From amit.sahrawat83@gmail.com Wed Dec 1 01:13:20 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: *** X-Spam-Status: No, score=3.9 required=5.0 tests=BAYES_50,FREEMAIL_FROM, HTML_MESSAGE,J_CHICKENPOX_46,T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB17DJhq183896 for ; Wed, 1 Dec 2010 01:13:20 -0600 X-ASG-Debug-ID: 1291187699-7bb202420000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qy0-f181.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 603831C85653 for ; Tue, 30 Nov 2010 23:14:59 -0800 (PST) Received: from mail-qy0-f181.google.com (mail-qy0-f181.google.com [209.85.216.181]) by cuda.sgi.com with ESMTP id M6hQb6dEIOfeklxh for ; Tue, 30 Nov 2010 23:14:59 -0800 (PST) Received: by qyk12 with SMTP id 12so7482028qyk.5 for ; Tue, 30 Nov 2010 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file system corruption(Return Bad Transaction) kernel - 2.6.34 Subject: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 From: Amit Sahrawat To: Eric Sandeen , xfs@oss.sgi.com, sandeen-xfs@sandeen.net Content-Type: multipart/alternative; boundary=0015175cb71a246c770496541099 X-Barracuda-Connect: mail-qy0-f181.google.com[209.85.216.181] X-Barracuda-Start-Time: 1291187700 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.50 X-Barracuda-Spam-Status: No, SCORE=-1.50 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE, MIME_BASE64_TEXT X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48143 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message 0.52 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --0015175cb71a246c770496541099 Content-Type: text/plain; charset=ISO-8859-1 Dear Member, I am getting following corruption on XFS formatted disk during a simple copy operation: sd 9:0:0:0: Attached scsi removable disk sdc sd 9:0:0:0: Attached scsi generic sg2 type 0 XFS mounting filesystem sdc2 Starting XFS recovery on filesystem: sdc2 (logdev: internal) XFS: xlog_recover_process_data: bad transaction XFS: log mount/recovery failed: error 5 XFS: log mount failed [root@localhost TEGRA]# [root@localhost TEGRA]# mount /dev/sdc2 /mnt/ mount: /dev/sdc2: can't read superblock [root@localhost TEGRA]# xfs_logprint -t /dev/sdc2 xfs_logprint: data device: 0x822 log device: 0x822 daddr: 6809632 length: 20480 log tail: 284 head: 412 state: LOG REC AT LSN cycle 1 block 284 (0x1, 0x11c) ============================================================================ TRANS: tid:0x863c5000 type:CREATE #items:5 trans:0x0 q:0x80b5c08 BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x2 len:1 bmap size:1 flags:0x0 AGI Buffer: (XAGI) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x18 len:8 bmap size:2 flags:0x0 BUF DATA INO: cnt:2 total:2 a:0x80adaa8 len:56 a:0x80adb20 len:96 INODE: #regs:2 ino:0x85 flags:0x1 dsize:0 CORE inode: INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80b5c48 len:96 a:0x80b5cb0 len:68 INODE: #regs:3 ino:0x80 flags:0x3 dsize:68 CORE inode: DATA FORK LOCAL inode data: BUF: cnt:2 total:2 a:0x80b5cf8 len:24 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5d18 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c48 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c68 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5d18 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5cf8 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c68 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c48 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5cf8 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5d18 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c48 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c68 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5d18 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5cf8 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c68 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c48 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5cf8 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5d18 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c48 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c68 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5d18 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5cf8 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c68 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c48 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5cf8 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5d18 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c48 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c68 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5d18 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5cf8 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c68 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c48 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5cf8 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5d18 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c48 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c68 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5d18 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5cf8 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c68 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c48 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5cf8 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5d18 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c48 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c68 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5d18 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5cf8 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c68 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c48 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5cf8 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5d18 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c48 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c68 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5d18 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5cf8 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c68 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c48 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5cf8 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5d18 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c48 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c68 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5d18 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5cf8 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80adbe8 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80adbc8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80adae8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c08 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c68 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: ============================================================================ TRANS: tid:0x863c5000 type:STRAT_WRITE #items:5 trans:0x0 q:0x80b5c48 INO: cnt:3 total:3 a:0x80adb88 len:56 a:0x80adb20 len:96 a:0x80b5c88 len:16 INODE: #regs:3 ino:0x85 flags:0x5 dsize:16 CORE inode: DATA FORK EXTENTS inode data: BUF: cnt:2 total:2 a:0x80ad6f8 len:24 a:0x80ad730 len:128 BUF: #regs:2 start blkno:0x1 len:1 bmap size:1 flags:0x0 AGF Buffer: (XAGF) BUF: cnt:2 total:2 a:0x80ad7b8 len:28 a:0x80ada20 len:128 BUF: #regs:2 start blkno:0x10 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5c28 len:28 a:0x80b5d38 len:128 BUF: #regs:2 start blkno:0x8 len:8 bmap size:2 flags:0x0 BUF DATA BUF: cnt:2 total:2 a:0x80b5cf8 len:24 a:0x80b5dc0 len:128 BUF: #regs:2 start blkno:0x0 len:1 bmap size:1 flags:0x0 SUPER Block Buffer: LOG REC AT LSN cycle 1 block 348 (0x1, 0x15c) XFS: xlog_recover_process_data: bad transaction xfs_logprint: failed in xfs_do_recovery_pass, error: 5 --0015175cb71a246c770496541099 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: base64 PGRpdj5EZWFyIE1lbWJlciw8L2Rpdj4KPGRpdj6gPC9kaXY+CjxkaXY+SSBhbSBnZXR0aW5nIGZv bGxvd2luZyBjb3JydXB0aW9uIG9uIFhGUyBmb3JtYXR0ZWQgZGlzayBkdXJpbmcgYSBzaW1wbGUg Y29weSBvcGVyYXRpb246PC9kaXY+CjxkaXY+c2QgOTowOjA6MDogQXR0YWNoZWQgc2NzaSByZW1v 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08:42:28 +0100 (CET) Date: Wed, 1 Dec 2010 08:42:25 +0100 From: Emmanuel Florac To: naveen yadav Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: issue with unmount of XFS partation Subject: Re: issue with unmount of XFS partation Message-ID: <20101201084225.7e47a2ff@galadriel.home> In-Reply-To: References: Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp3-g21.free.fr[212.27.42.3] X-Barracuda-Start-Time: 1291189355 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48145 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Wed, 1 Dec 2010 10:13:57 +0530 vous =E9criviez: > FAT got unmounted every time, but XFS does not, >=20 > /dev/sda2 on /dtv/usb/sda2 type xfs (rw,relatime,nouuid,attr2,noquota) > /dev/sdb2 on /dtv/usb/sdb2 type xfs (rw,relatime,nouuid,attr2,noquota) >=20 > If I do sync on Shell I got below error. I don't get it, do you unmount the FS before unplugging USB? It looks like you simply pulled the cable. FAT is an extremely primitive filesystem that remains coherent when there isn't any data in cache or disk activity; xfs (and all other modern filesystems) simply doesn't work that way. You must "umount" it before unplugging, else you'll break it. --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From MAILER-DAEMON@oss.sgi.com Wed Dec 1 05:47:56 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=BAYES_20,MISSING_MIME_HB_SEP, T_MIME_NO_TEXT,T_TVD_MIME_NO_HEADERS autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1Blubd204291 for ; Wed, 1 Dec 2010 05:47:56 -0600 X-ASG-Debug-ID: 1291204179-457e01330000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail7.fastdnsnetwork.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 784071B9DA6 for ; Wed, 1 Dec 2010 03:49:39 -0800 (PST) Received: from mail7.fastdnsnetwork.com (mail7.fastdnsnetwork.com [174.133.162.186]) by cuda.sgi.com with ESMTP id bKiaCfBu3sXMLbfj for ; Wed, 01 Dec 2010 03:49:39 -0800 (PST) Received: (qmail 21039 invoked for bounce); 1 Dec 2010 11:48:15 -0000 Date: 1 Dec 2010 11:48:15 -0000 From: MAILER-DAEMON@mail7.fastdnsnetwork.com To: xfs@oss.sgi.com MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="1291204095mail7.fastdnsnetwork.com33097008" X-ASG-Orig-Subj: failure notice Subject: failure notice X-Barracuda-Connect: mail7.fastdnsnetwork.com[174.133.162.186] X-Barracuda-Start-Time: 1291204179 Message-Id: <20101201114939.784071B9DA6@cuda.sgi.com> X-Barracuda-Bayes: INNOCENT GLOBAL 0.1645 1.0000 -1.0202 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.68 X-Barracuda-Spam-Status: No, SCORE=-0.68 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=ANY_BOUNCE_MESSAGE, BOUNCE_MESSAGE, BSF_SC0_MISSING_MID, BSF_SC0_SA590, NO_REAL_NAME X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48160 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 NO_REAL_NAME From: does not include a real name 0.14 BSF_SC0_MISSING_MID BODY: Custom Rule BSF_SC0_MISSING_MID 0.20 BSF_SC0_SA590 Custom Rule SA590 0.00 BOUNCE_MESSAGE MTA bounce message 0.00 ANY_BOUNCE_MESSAGE Message is some kind of bounce message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --1291204095mail7.fastdnsnetwork.com33097008 Hi. This is the qmail-send program at mail7.fastdnsnetwork.com. I'm afraid I wasn't able to deliver your message to the following addresses. This is a permanent error; I've given up. Sorry it didn't work out. : mail is looping --- Enclosed are the original headers of the message. --1291204095mail7.fastdnsnetwork.com33097008 Content-Type: message/rfc822 Return-Path: Received: (qmail 20900 invoked by uid 399); 1 Dec 2010 11:48:09 -0000 Delivered-To: bennorayan@goodleather.net Received: (qmail 20786 invoked by uid 399); 1 Dec 2010 11:48:04 -0000 Message-ID: <20101201114804.20785.qmail@mail7.fastdnsnetwork.com> Delivered-To: goodledr@goodleather.net Received: (qmail 20708 invoked by uid 399); 1 Dec 2010 11:47:59 -0000 Received: from unknown (HELO oss.sgi.com) (122.166.114.232) by mail7.fastdnsnetwork.com with ESMTP; 1 Dec 2010 11:47:59 -0000 X-Originating-IP: 122.166.114.232 Received-SPF: none (mail7.fastdnsnetwork.com: domain at oss.sgi.com does not designate permitted sender hosts) identity=mailfrom; client-ip=122.166.114.232; envelope-from=; From: xfs@oss.sgi.com To: goodledr@goodleather.net Subject: MESSAGE COULD NOT BE DELIVERED Date: Wed, 1 Dec 2010 17:18:21 +0530 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_NextPart_000_0008_074DE884.2DD529BA" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2600.0000 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2600.0000 (Body supressed) ------=_NextPart_000_0008_074DE884.2DD529BA-- --1291204095mail7.fastdnsnetwork.com33097008-- From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 06:28:53 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1CSpQm206746 for ; Wed, 1 Dec 2010 06:28:53 -0600 X-ASG-Debug-ID: 1291206634-4f7d01390000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B34621BA206 for ; Wed, 1 Dec 2010 04:30:34 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id l8bysXQsBmqld5ap for ; Wed, 01 Dec 2010 04:30:34 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNlpQ-0008Sn-PM; Wed, 01 Dec 2010 12:30:32 +0000 Date: Wed, 1 Dec 2010 07:30:32 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 02/14] xfs: clean up log space grant functions Subject: Re: [PATCH 02/14] xfs: clean up log space grant functions Message-ID: <20101201123032.GA20378@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-3-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-3-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291206634 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Nov 29, 2010 at 12:38:20PM +1100, Dave Chinner wrote: > From: Dave Chinner > > xlog_grant_log_space and xlog_regrant_log_write_space both have very > similar structure. Both have a "wait on non-empty queue" section at > the start, followed by a "wait for space" loop of which the contents > are almost identical to the initial non-empty queue section. > > In both cases, the non-empty queue wait can be folded into the wait > for space loop, simply by entering the loop if the queue is not > empty and the current ticket is not on the queue. If we trigger the > non-empty queue case, we always add ourselves to the queue, and > hence the second and subsequent loops are always driven by the "wait > for space" test. > > IOWs, both wait conditions can be folded into the one loop, removing > a bunch of duplicated code and making it simpler to modify in > future patches. I don't really like this patch. The new conditions are overly complicated because of the desire to only go through the loop once for the queue not empty case. In addition there's some behaviour changes: - in xlog_grant_log_space we previously didn't call xlog_grant_push_ail for the queue not empty case, and now we do. - in xlog_regrant_write_log_space the old version of the queue not empty case would loop over all waiting tickets, and if we could wake up all of them we'll skip the first wait, and given enough free space also the second wait, while the new code always adds it to the writeq, although it will still skip the actualy wait later. My recommendation would be to skip this patch for now and revisit the area later. For example the superflous xlog_grant_push_ail actually is rather harmless these days with the xfsaild threshold, so not skipping it for the first case probably is fine in the end. Then again the whole add to the queue just in case if it's non-empty doesn't make much sense to me to start with. As soon as xfs_log_move_tail makes space in the log it wakes up all tickets waiting for it anyway, so adding us to the queue just in case seems rather inefficient, and not overl helpful. From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 06:33:11 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1CXBuw206973 for ; Wed, 1 Dec 2010 06:33:11 -0600 X-ASG-Debug-ID: 1291206894-4f7d014d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E4CE01BA235 for ; Wed, 1 Dec 2010 04:34:54 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id h6qe7ggXkOvHDQtY for ; Wed, 01 Dec 2010 04:34:54 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNlte-0000BE-DI; Wed, 01 Dec 2010 12:34:54 +0000 Date: Wed, 1 Dec 2010 07:34:54 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 04/14] xfs: use wait queues directly for log grant queues Subject: Re: [PATCH 04/14] xfs: use wait queues directly for log grant queues Message-ID: <20101201123454.GA612@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-5-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-5-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291206894 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Nov 29, 2010 at 12:38:22PM +1100, Dave Chinner wrote: > From: Dave Chinner > > The log grant queues are one of the few places left using sv_t > constructs for waiting. Convert them to use wait queues directly > while we are cleaning up the code to move one step closer to remove > the sv_t type from the XFS codebase. Doing this one separately from the other sv_t removal seems a bit pointless. From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 06:40:52 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1Cep1V207442 for ; Wed, 1 Dec 2010 06:40:52 -0600 X-ASG-Debug-ID: 1291207355-4f7d018a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 69D751BA274 for ; Wed, 1 Dec 2010 04:42:35 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id m2zCzzLfuPlb0TYe for ; Wed, 01 Dec 2010 04:42:35 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNm15-0001eE-1t; Wed, 01 Dec 2010 12:42:35 +0000 Date: Wed, 1 Dec 2010 07:42:35 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 03/14] xfs: convert log grant heads to LSN notation Subject: Re: [PATCH 03/14] xfs: convert log grant heads to LSN notation Message-ID: <20101201124234.GB612@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-4-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-4-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291207355 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean The patch looks good to me, but I really hate overloading the lsn types and helpers. Just add duplicated of CYCLE_LSN/BLOCK_LSN and xlog_assign_lsn for a new type as use them. From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 06:43:57 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1ChvZp207784 for ; Wed, 1 Dec 2010 06:43:57 -0600 X-ASG-Debug-ID: 1291207540-083e00540000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1E4EF140434D for ; Wed, 1 Dec 2010 04:45:40 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id Iy0vDivUZzxRXprn for ; Wed, 01 Dec 2010 04:45:40 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNm44-0002PD-Bl; Wed, 01 Dec 2010 12:45:40 +0000 Date: Wed, 1 Dec 2010 07:45:40 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 05/14] xfs: make AIL tail pushing independent of the grant lock Subject: Re: [PATCH 05/14] xfs: make AIL tail pushing independent of the grant lock Message-ID: <20101201124540.GC612@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-6-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-6-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291207541 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Once l_tail_lsn and l_last_sync_lsn are converted to atomic64_ts later in the series passing them in separately becomes pointless again. Maybe scale the patch back a bit and require the caller to hold l_grant_lock for now, until the atomic64_t conversion happens. From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 06:53:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1Cr0E4208341 for ; Wed, 1 Dec 2010 06:53:01 -0600 X-ASG-Debug-ID: 1291208083-0bf8006a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id EC8231404474 for ; Wed, 1 Dec 2010 04:54:43 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id cUkp1cjKU1cRCXnc for ; Wed, 01 Dec 2010 04:54:43 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNmCp-0003HE-A4; Wed, 01 Dec 2010 12:54:43 +0000 Date: Wed, 1 Dec 2010 07:54:43 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 06/14] xfs: convert l_last_sync_lsn to an atomic variable Subject: Re: [PATCH 06/14] xfs: convert l_last_sync_lsn to an atomic variable Message-ID: <20101201125443.GD612@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-7-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-7-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291208083 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Looks good, Reviewed-by: Christoph Hellwig From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 06:54:22 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1CsLBR208436 for ; Wed, 1 Dec 2010 06:54:22 -0600 X-ASG-Debug-ID: 1291208165-6d22013d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 90AC41C85F8B for ; Wed, 1 Dec 2010 04:56:05 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id jeLh54POaroeDZg7 for ; Wed, 01 Dec 2010 04:56:05 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNmE8-0003xK-V8; Wed, 01 Dec 2010 12:56:05 +0000 Date: Wed, 1 Dec 2010 07:56:04 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 07/14] xfs: convert l_tail_lsn to an atomic variable. Subject: Re: [PATCH 07/14] xfs: convert l_tail_lsn to an atomic variable. Message-ID: <20101201125604.GE612@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-8-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-8-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291208165 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Looks good, Reviewed-by: Christoph Hellwig From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 06:57:37 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1Cvb2g208651 for ; Wed, 1 Dec 2010 06:57:37 -0600 X-ASG-Debug-ID: 1291208361-6d2f01630000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 37FE11C86905 for ; Wed, 1 Dec 2010 04:59:21 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id GxLMksyaNx2cGes2 for ; Wed, 01 Dec 2010 04:59:21 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNmHI-00044q-PM; Wed, 01 Dec 2010 12:59:20 +0000 Date: Wed, 1 Dec 2010 07:59:20 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 08/14] xfs: convert log grant heads to atomic variables Subject: Re: [PATCH 08/14] xfs: convert log grant heads to atomic variables Message-ID: <20101201125920.GF612@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-9-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-9-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291208361 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Nov 29, 2010 at 12:38:26PM +1100, Dave Chinner wrote: > From: Dave Chinner > > Convert the log grant heads to atomic64_t types in preparation for > converting the accounting algorithms to atomic operations. his patch > just converts the variables; the algorithmic changes are in a > separate patch for clarity. > > Signed-off-by: Dave Chinner > --- > fs/xfs/linux-2.6/xfs_trace.h | 18 +++++++------ > fs/xfs/xfs_log.c | 54 +++++++++++++++++++++-------------------- > fs/xfs/xfs_log_priv.h | 4 +- > fs/xfs/xfs_log_recover.c | 8 +++--- > 4 files changed, 44 insertions(+), 40 deletions(-) > > diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h > index d2cdc85..68c3bdd 100644 > --- a/fs/xfs/linux-2.6/xfs_trace.h > +++ b/fs/xfs/linux-2.6/xfs_trace.h > @@ -768,8 +768,8 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, > __field(unsigned int, flags) > __field(void *, reserveq) > __field(void *, writeq) > - __field(xfs_lsn_t, grant_reserve_lsn) > - __field(xfs_lsn_t, grant_write_lsn) > + __field(xfs_lsn_t, grant_reserve_head) > + __field(xfs_lsn_t, grant_write_head) What about just naming them _head from the beginning? That would be a tad cleaner. Same for the actual variables in the log, even if they change the type here. Otherwise looks good, Reviewed-by: Christoph Hellwig From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 07:03:21 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1D3LIk209024 for ; Wed, 1 Dec 2010 07:03:21 -0600 X-ASG-Debug-ID: 1291208705-643102040000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3D92C1C8695E for ; Wed, 1 Dec 2010 05:05:05 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 6so5STpUVC4BwNKR for ; Wed, 01 Dec 2010 05:05:05 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNmMq-0005WZ-PB; Wed, 01 Dec 2010 13:05:04 +0000 Date: Wed, 1 Dec 2010 08:05:04 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 03/14] xfs: convert log grant heads to LSN notation Subject: Re: [PATCH 03/14] xfs: convert log grant heads to LSN notation Message-ID: <20101201130504.GA18379@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-4-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-4-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291208705 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean > -STATIC int xlog_space_left(xlog_t *log, int cycle, int bytes); > +STATIC int xlog_space_left(int logsize, xfs_lsn_t tail_lsn, > + xfs_lsn_t head); Looking further through the series I have to say I really hate passing in the logsize instead of the log structure. Passing the log pointer from higher level functions just makes a lot more sense. Also in this case passing the tail_lsn explicitly doesn't make any sense - it becomes atomic later and thus there is no locking requirement for it. > -xlog_grant_sub_space(struct log *log, int bytes) > +__xlog_grant_sub_space( > + xfs_lsn_t *head, > + int bytes, > + int logsize) Same thing here - the calling convention would be a lot more regular by still passing the log as first argument. After the factoring I also think we could cut down on the amount of wrappers in this area. Just rename __xlog_grant_sub_space and __xlog_grant_add_space to not have the __ prefix, and kill the wrappers around it - they only have one or two callers, and just having two helpers and passing the heads we're interested in is a lot simpler and cleaner. From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 07:10:25 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,SUBJ_TICKET autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1DAPuD209478 for ; Wed, 1 Dec 2010 07:10:25 -0600 X-ASG-Debug-ID: 1291209129-406703180000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 44C391BA3EC for ; Wed, 1 Dec 2010 05:12:09 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id q64kedN01J7Mzlkm for ; Wed, 01 Dec 2010 05:12:09 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNmTg-0006aZ-Sr; Wed, 01 Dec 2010 13:12:08 +0000 Date: Wed, 1 Dec 2010 08:12:08 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 09/14] xfs: introduce new locks for the log grant ticket wait queues Subject: Re: [PATCH 09/14] xfs: introduce new locks for the log grant ticket wait queues Message-ID: <20101201131208.GA22455@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-10-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-10-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291209129 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean > + /* co-ordinate with xfs_log_force_shutdown */ > + if (XLOG_FORCED_SHUTDOWN(log)) { > + spin_unlock(&log->l_grant_reserve_lock); > + goto error_return; > + } Where is this coming from? Otherwise the patch looks good to me. From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 07:13:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1DDUNu209979 for ; Wed, 1 Dec 2010 07:13:30 -0600 X-ASG-Debug-ID: 1291209313-406e031d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C2A491BA432 for ; Wed, 1 Dec 2010 05:15:13 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id lDIHVfukgERkqxYG for ; Wed, 01 Dec 2010 05:15:13 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNmWf-0007XD-BO; Wed, 01 Dec 2010 13:15:13 +0000 Date: Wed, 1 Dec 2010 08:15:13 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 10/14] xfs: convert grant head manipulations to lockless algorithm Subject: Re: [PATCH 10/14] xfs: convert grant head manipulations to lockless algorithm Message-ID: <20101201131513.GB22455@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-11-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-11-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291209313 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Nov 29, 2010 at 12:38:28PM +1100, Dave Chinner wrote: > From: Dave Chinner > > The only thing that the grant lock remains to protect is the grant head > manipulations when adding or removing space from the log. These calculations > are already based on atomic variables, so we can already update them safely > without locks. However, the grant head manpulations require atomic multi-step > calculations to be executed, which the algorithms currently don't allow. > > To make these multi-step calculations atomic, convert the algorithms to > compare-and-exchange loops on the atomic variables. That is, we sample the old > value, perform the calculation and use atomic64_cmpxchg() to attempt to update > the head with the new value. If the head has not changed since we sampled it, > it will succeed and we are done. Otherwise, we rerun the calculation again from > a new sample of the head. > > This allows us to remove the grant lock from around all the grant head space > manipulations, and that effectively removes the grant lock from the log > completely. > > Signed-off-by: Dave Chinner > --- > fs/xfs/xfs_log.c | 133 ++++++++++++++++++++++++++++++------------------------ > 1 files changed, 74 insertions(+), 59 deletions(-) > > diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c > index 8365496..50cf6af 100644 > --- a/fs/xfs/xfs_log.c > +++ b/fs/xfs/xfs_log.c > @@ -111,6 +111,13 @@ STATIC int xlog_iclogs_empty(xlog_t *log); > * is the byte offset into the log for the marker. Unlike the xfs_lsn_t, this > * is held in bytes rather than basic blocks, even though it uses the > * BLOCK_LSN() macro to extract it. > + * > + * We use a lock-free compare and exchange algorithm to atomically update > + * the grant head. That is, we sample the current head, crack it, perform the > + * calculation, recombine it into a new value, and then conditionally set the > + * value back into the atomic variable only if it hasn't changed since we first > + * sampled it. This provides atomic updates of the head, even though we do > + * non-atomic, multi-step calculation to arrive at the new value. > */ > static void > __xlog_grant_sub_space( > @@ -119,16 +126,23 @@ __xlog_grant_sub_space( > int logsize) > { > xfs_lsn_t head_lsn = atomic64_read(head); > - int cycle, space; > + xfs_lsn_t old, new; > > - cycle = CYCLE_LSN(head_lsn); > - space = BLOCK_LSN(head_lsn); > - space -= bytes; > - if (space < 0) { > - cycle--; > - space += logsize; > - } > - atomic64_set(head, xlog_assign_lsn(cycle, space)); > + do { > + int cycle, space; > + > + cycle = CYCLE_LSN(head_lsn); > + space = BLOCK_LSN(head_lsn); > + space -= bytes; > + if (space < 0) { > + cycle--; > + space += logsize; > + } > + > + old = head_lsn; > + new = xlog_assign_lsn(cycle, space); > + head_lsn = atomic64_cmpxchg(head, old, new); > + } while (head_lsn != old); > } > > static void > @@ -138,18 +152,25 @@ __xlog_grant_add_space( > int logsize) > { > xfs_lsn_t head_lsn = atomic64_read(head); > - int cycle, space, tmp; > + xfs_lsn_t old, new; > > - cycle = CYCLE_LSN(head_lsn); > - space = BLOCK_LSN(head_lsn); > - tmp = logsize - space; > - if (tmp > bytes) > - space += bytes; > - else { > - cycle++; > - space = bytes - tmp; > - } > - atomic64_set(head, xlog_assign_lsn(cycle, space)); > + do { > + int cycle, space, tmp; > + > + cycle = CYCLE_LSN(head_lsn); > + space = BLOCK_LSN(head_lsn); > + tmp = logsize - space; > + if (tmp > bytes) > + space += bytes; > + else { > + cycle++; > + space = bytes - tmp; > + } > + > + old = head_lsn; > + new = xlog_assign_lsn(cycle, space); > + head_lsn = atomic64_cmpxchg(head, old, new); > + } while (head_lsn != old); > } > > static inline void > @@ -360,11 +381,9 @@ xfs_log_reserve( > > trace_xfs_log_reserve(log, internal_ticket); > > - spin_lock(&log->l_grant_lock); > xlog_grant_push_ail(log, atomic64_read(&log->l_tail_lsn), > atomic64_read(&log->l_last_sync_lsn), > internal_ticket->t_unit_res); > - spin_unlock(&log->l_grant_lock); > retval = xlog_regrant_write_log_space(log, internal_ticket); > } else { > /* may sleep if need to allocate more tickets */ > @@ -378,12 +397,10 @@ xfs_log_reserve( > > trace_xfs_log_reserve(log, internal_ticket); > > - spin_lock(&log->l_grant_lock); > xlog_grant_push_ail(log, atomic64_read(&log->l_tail_lsn), > atomic64_read(&log->l_last_sync_lsn), > (internal_ticket->t_unit_res * > internal_ticket->t_cnt)); > - spin_unlock(&log->l_grant_lock); > retval = xlog_grant_log_space(log, internal_ticket); > } > > @@ -1376,9 +1393,7 @@ xlog_sync(xlog_t *log, > roundoff < BBTOB(1))); > > /* move grant heads by roundoff in sync */ > - spin_lock(&log->l_grant_lock); > xlog_grant_add_space(log, roundoff); > - spin_unlock(&log->l_grant_lock); > > /* put cycle number in every block */ > xlog_pack_data(log, iclog, roundoff); > @@ -2618,13 +2633,11 @@ redo: > } > > /* we've got enough space */ > - spin_lock(&log->l_grant_lock); > xlog_grant_add_space(log, need_bytes); > > trace_xfs_log_grant_exit(log, tic); > xlog_verify_grant_tail(log); > xlog_verify_grant_head(log, 1); > - spin_unlock(&log->l_grant_lock); > return 0; > > error_return: > @@ -2752,13 +2765,11 @@ redo: > } > > /* we've got enough space */ > - spin_lock(&log->l_grant_lock); > xlog_grant_add_space_write(log, need_bytes); > > trace_xfs_log_regrant_write_exit(log, tic); > xlog_verify_grant_tail(log); > xlog_verify_grant_head(log, 1); > - spin_unlock(&log->l_grant_lock); > return 0; > > > @@ -2779,23 +2790,23 @@ redo: > } > > > -/* The first cnt-1 times through here we don't need to > - * move the grant write head because the permanent > - * reservation has reserved cnt times the unit amount. > - * Release part of current permanent unit reservation and > - * reset current reservation to be one units worth. Also > - * move grant reservation head forward. > +/* > + * The first cnt-1 times through here we don't need to move the grant write > + * head because the permanent reservation has reserved cnt times the unit > + * amount. Release part of current permanent unit reservation and reset > + * current reservation to be one units worth. Also move grant reservation head > + * forward. > */ > STATIC void > -xlog_regrant_reserve_log_space(xlog_t *log, > - xlog_ticket_t *ticket) > +xlog_regrant_reserve_log_space( > + struct log *log, > + struct xlog_ticket *ticket) > { > trace_xfs_log_regrant_reserve_enter(log, ticket); > > if (ticket->t_cnt > 0) > ticket->t_cnt--; > > - spin_lock(&log->l_grant_lock); > xlog_grant_sub_space(log, ticket->t_curr_res); > ticket->t_curr_res = ticket->t_unit_res; > xlog_tic_reset_res(ticket); > @@ -2805,20 +2816,17 @@ xlog_regrant_reserve_log_space(xlog_t *log, > xlog_verify_grant_head(log, 1); > > /* just return if we still have some of the pre-reserved space */ > - if (ticket->t_cnt > 0) { > - spin_unlock(&log->l_grant_lock); > + if (ticket->t_cnt > 0) > return; > - } > > xlog_grant_add_space_reserve(log, ticket->t_unit_res); > > trace_xfs_log_regrant_reserve_exit(log, ticket); > > xlog_verify_grant_head(log, 0); > - spin_unlock(&log->l_grant_lock); > ticket->t_curr_res = ticket->t_unit_res; > xlog_tic_reset_res(ticket); > -} /* xlog_regrant_reserve_log_space */ > +} > > > /* > @@ -2836,34 +2844,33 @@ xlog_regrant_reserve_log_space(xlog_t *log, > * in the current reservation field. > */ > STATIC void > -xlog_ungrant_log_space(xlog_t *log, > - xlog_ticket_t *ticket) > +xlog_ungrant_log_space( > + struct log *log, > + struct xlog_ticket *ticket) > { > - if (ticket->t_cnt > 0) > - ticket->t_cnt--; > + int space; > > - spin_lock(&log->l_grant_lock); > trace_xfs_log_ungrant_enter(log, ticket); > + if (ticket->t_cnt > 0) > + ticket->t_cnt--; > > - xlog_grant_sub_space(log, ticket->t_curr_res); > - > - trace_xfs_log_ungrant_sub(log, ticket); > - > - /* If this is a permanent reservation ticket, we may be able to free > + /* > + * If this is a permanent reservation ticket, we may be able to free > * up more space based on the remaining count. > */ > + space = ticket->t_curr_res; > if (ticket->t_cnt > 0) { > ASSERT(ticket->t_flags & XLOG_TIC_PERM_RESERV); > - xlog_grant_sub_space(log, ticket->t_unit_res*ticket->t_cnt); > + space += ticket->t_unit_res * ticket->t_cnt; > } > + trace_xfs_log_ungrant_sub(log, ticket); > + xlog_grant_sub_space(log, space); > > trace_xfs_log_ungrant_exit(log, ticket); > - > xlog_verify_grant_head(log, 1); > - spin_unlock(&log->l_grant_lock); > - xfs_log_move_tail(log->l_mp, 1); > -} /* xlog_ungrant_log_space */ > > + xfs_log_move_tail(log->l_mp, 1); > +} > > /* > * Flush iclog to disk if this is the last reference to the given iclog and > @@ -3478,11 +3485,18 @@ xlog_verify_dest_ptr( > xlog_panic("xlog_verify_dest_ptr: invalid ptr"); > } > > +/* > + * XXX: because we cannot atomically sample both the reserve and write heads, > + * we cannot verify them reliably as they may be sampled in the middle of > + * racing modifications. Hence just taking snapshots of the heads can give an > + * incorrect view of the state of log. Hence just disable this check for now. > + */ > STATIC void > xlog_verify_grant_head( I can't see any way to keep this check with the atomic reserve/write heads, so we might as well remove it entirely. Otherwise the patch looks good, Reviewed-by: Christoph Hellwig From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 07:13:52 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1DDqo3210027 for ; Wed, 1 Dec 2010 07:13:52 -0600 X-ASG-Debug-ID: 1291209336-6d0001a00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 58D331C869F1 for ; Wed, 1 Dec 2010 05:15:36 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id S7zSNh5l0XEAoBAF for ; Wed, 01 Dec 2010 05:15:36 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNmX1-0007Y0-Ve; Wed, 01 Dec 2010 13:15:36 +0000 Date: Wed, 1 Dec 2010 08:15:35 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 11/14] xfs: remove log grant lock Subject: Re: [PATCH 11/14] xfs: remove log grant lock Message-ID: <20101201131535.GC22455@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-12-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-12-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291209336 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Nov 29, 2010 at 12:38:29PM +1100, Dave Chinner wrote: > From: Dave Chinner > > The log grant lock no longer protects anything, so remove the remaining > initialisation and teardown code that still exists. Looks good, although I would fold it into the previous patch. Reviewed-by: Christoph Hellwig From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 07:17:25 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1DHOo0210298 for ; Wed, 1 Dec 2010 07:17:25 -0600 X-ASG-Debug-ID: 1291209548-6d1b01ab0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 72EBD1C86806 for ; Wed, 1 Dec 2010 05:19:08 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id Q1vZbIKBGpPtOIVN for ; Wed, 01 Dec 2010 05:19:08 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNmaS-0007ui-0p; Wed, 01 Dec 2010 13:19:08 +0000 Date: Wed, 1 Dec 2010 08:19:08 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 12/14] xfs: kill useless spinlock_destroy macro Subject: Re: [PATCH 12/14] xfs: kill useless spinlock_destroy macro Message-ID: <20101201131907.GD22455@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-13-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-13-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291209548 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Nov 29, 2010 at 12:38:30PM +1100, Dave Chinner wrote: > From: Dave Chinner > > It is only used in 2 places in the log code, and is an empty macro, > so get rid of it. yeah, time to kill it. Reviewed-by: Christoph Hellwig From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 07:18:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1DINuJ210361 for ; Wed, 1 Dec 2010 07:18:23 -0600 X-ASG-Debug-ID: 1291209606-21fa002b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 282551404539 for ; Wed, 1 Dec 2010 05:20:06 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 21ms22AqSnJd31Es for ; Wed, 01 Dec 2010 05:20:06 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNmbO-00006c-FJ; Wed, 01 Dec 2010 13:20:06 +0000 Date: Wed, 1 Dec 2010 08:20:06 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 13/14] xfs: replace use of sv_t with waitqueues in the log Subject: Re: [PATCH 13/14] xfs: replace use of sv_t with waitqueues in the log Message-ID: <20101201132006.GE22455@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-14-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-14-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291209607 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Nov 29, 2010 at 12:38:31PM +1100, Dave Chinner wrote: > From: Dave Chinner > > Only the log still uses the old Irix wait queue interface. The log > grant lock scaling series killed one of the users, so convert > the remaining users of sv_t to plain wait queues so the sv_t wrapper can > be removed. Looks good, but as said before I'd prefer it to be merged with the introduction of xlog_wait and the first sv_t removal. Reviewed-by: Christoph Hellwig From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 07:18:47 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1DIlWX210409 for ; Wed, 1 Dec 2010 07:18:47 -0600 X-ASG-Debug-ID: 1291209630-457f02ea0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C7FB31B9FF8 for ; Wed, 1 Dec 2010 05:20:30 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id riqg9mCF0KoDhXhx for ; Wed, 01 Dec 2010 05:20:30 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNmbm-00007D-Bx; Wed, 01 Dec 2010 13:20:30 +0000 Date: Wed, 1 Dec 2010 08:20:30 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 14/14] xfs: remove sv wrappers Subject: Re: [PATCH 14/14] xfs: remove sv wrappers Message-ID: <20101201132030.GF22455@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-15-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290994712-21376-15-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291209630 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Nov 29, 2010 at 12:38:32PM +1100, Dave Chinner wrote: > From: Dave Chinner > > The sv_t type is no longer used in XFS. Remove the header file defining the > wrapper and the fragments that still reference it. Looks good, although I'd suggest merging it into the previous patch. Reviewed-by: Christoph Hellwig From sandeen@sandeen.net Wed Dec 1 08:53:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1ErMMD217074 for ; Wed, 1 Dec 2010 08:53:23 -0600 X-ASG-Debug-ID: 1291215304-21fa02150000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id F22CB16071C5 for ; Wed, 1 Dec 2010 06:55:04 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id 9kPCTeEBnCjprria for ; Wed, 01 Dec 2010 06:55:04 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id 1EA054817D73; Wed, 1 Dec 2010 08:55:04 -0600 (CST) Message-ID: <4CF661C7.2020103@sandeen.net> Date: Wed, 01 Dec 2010 08:55:03 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: Amit Sahrawat CC: xfs@oss.sgi.com, sandeen-xfs@sandeen.net X-ASG-Orig-Subj: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 Subject: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1291215305 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48174 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/1/10 1:14 AM, Amit Sahrawat wrote: > Dear Member, > > I am getting following corruption on XFS formatted disk during a simple copy operation: > sd 9:0:0:0: Attached scsi removable disk sdc > sd 9:0:0:0: Attached scsi generic sg2 type 0 > XFS mounting filesystem sdc2 > Starting XFS recovery on filesystem: sdc2 (logdev: internal) > XFS: xlog_recover_process_data: bad transaction > XFS: log mount/recovery failed: error 5 > XFS: log mount failed hm, that's not a simple copy operation, that is a mount failing; your log appears to be corrupted. offhand I'm going to blame it on having a write cache enabled on your drive, and having barriers either off, or not working properly. -Eric From aelder@sgi.com Wed Dec 1 14:28:36 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1KSaFd232389 for ; Wed, 1 Dec 2010 14:28:36 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay1.corp.sgi.com (Postfix) with ESMTP id E9D858F8094; Wed, 1 Dec 2010 12:30:16 -0800 (PST) Received: from [127.0.0.1] ([198.149.20.12]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 1 Dec 2010 14:29:40 -0600 Subject: xfstests 065 failures From: Alex Elder Reply-To: aelder@sgi.com To: dchinner@redhat.com Cc: Bill Kendall , XFS Mailing List Content-Type: text/plain; charset="UTF-8" Date: Wed, 01 Dec 2010 14:29:39 -0600 Message-ID: <1291235379.2556.28.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 01 Dec 2010 20:29:40.0145 (UTC) FILETIME=[7ACB3210:01CB9196] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Dave, you were asking on IRC about test 065 failures. I asked Bill Kendall about it and he bisected to find that the commit below seems to be where the problems started. I believe the problem is that one of the times is not updated properly when renaming the file "addedfile4". Here are the commands that might affect that file in test 065: mv addeddir4/addedfile5 addeddir4/addedfile4 mv addeddir4 addeddir6 I glanced at the commit and saw nothing obviously wrong, but at the moment I can't really dig into it any deeper so I thought I'd report what Bill found so others could look. -Alex >From dcd79a1423f64ee0184629874805c3ac40f3a2c5 Mon Sep 17 00:00:00 2001 From: Dave Chinner Date: Tue, 28 Sep 2010 12:27:25 +1000 Subject: [PATCH] xfs: don't use vfs writeback for pure metadata modifications Under heavy multi-way parallel create workloads, the VFS struggles to write back all the inodes that have been changed in age order. The bdi flusher thread becomes CPU bound, spending 85% of it's time in the VFS code, mostly traversing the superblock dirty inode list to separate dirty inodes old enough to flush. We already keep an index of all metadata changes in age order - in the AIL - and continued log pressure will do age ordered writeback without any extra overhead at all. If there is no pressure on the log, the xfssyncd will periodically write back metadata in ascending disk address offset order so will be very efficient. Hence we can stop marking VFS inodes dirty during transaction commit or when changing timestamps during transactions. This will keep the inodes in the superblock dirty list to those containing data or unlogged metadata changes. However, the timstamp changes are slightly more complex than this - there are a couple of places that do unlogged updates of the timestamps, and the VFS need to be informed of these. Hence add a new function xfs_trans_ichgtime() for transactional changes, and leave xfs_ichgtime() for the non-transactional changes. Signed-off-by: Dave Chinner Reviewed-by: Alex Elder Reviewed-by: Christoph Hellwig From aelder@oss.sgi.com Wed Dec 1 14:54:03 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-0.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from oss.sgi.com (localhost [127.0.0.1]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1Ks3DV233550 for ; Wed, 1 Dec 2010 14:54:03 -0600 Received: (from aelder@localhost) by oss.sgi.com (8.14.3/8.14.3/Submit) id oB1Ks0NA233500; Wed, 1 Dec 2010 14:54:00 -0600 Date: Wed, 1 Dec 2010 14:54:00 -0600 Message-Id: <201012012054.oB1Ks0NA233500@oss.sgi.com> From: xfs@oss.sgi.com To: xfs@oss.sgi.com Subject: [XFS updates] XFS development tree branch, master, updated. v2.6.36-rc8-11223-gc76febe X-Git-Refname: refs/heads/master X-Git-Reftype: branch X-Git-Oldrev: ece413f59f257682de4a2e2e42af33b016af53f3 X-Git-Newrev: c76febef574fd86566bbdf1a73a547a439115c25 This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "XFS development tree". The branch, master has been updated c76febe xfs: only run xfs_error_test if error injection is active de25c18 xfs: avoid moving stale inodes in the AIL 309c848 xfs: delayed alloc blocks beyond EOF are valid after writeback 90810b9 xfs: push stale, pinned buffers on trylock failures c726de4 xfs: fix failed write truncation handling. from ece413f59f257682de4a2e2e42af33b016af53f3 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit c76febef574fd86566bbdf1a73a547a439115c25 Author: Dave Chinner Date: Tue Nov 30 15:15:31 2010 +1100 xfs: only run xfs_error_test if error injection is active Recent tests writing lots of small files showed the flusher thread being CPU bound and taking a long time to do allocations on a debug kernel. perf showed this as the prime reason: samples pcnt function DSO _______ _____ ___________________________ _________________ 224648.00 36.8% xfs_error_test [kernel.kallsyms] 86045.00 14.1% xfs_btree_check_sblock [kernel.kallsyms] 39778.00 6.5% prandom32 [kernel.kallsyms] 37436.00 6.1% xfs_btree_increment [kernel.kallsyms] 29278.00 4.8% xfs_btree_get_rec [kernel.kallsyms] 27717.00 4.5% random32 [kernel.kallsyms] Walking btree blocks during allocation checking them requires each block (a cache hit, so no I/O) call xfs_error_test(), which then does a random32() call as the first operation. IOWs, ~50% of the CPU is being consumed just testing whether we need to inject an error, even though error injection is not active. Kill this overhead when error injection is not active by adding a global counter of active error traps and only calling into xfs_error_test when fault injection is active. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig commit de25c1818c44f580ff556cb9e0f7a1c687ed870b Author: Dave Chinner Date: Tue Nov 30 15:15:46 2010 +1100 xfs: avoid moving stale inodes in the AIL When an inode has been marked stale because the cluster is being freed, we don't want to (re-)insert this inode into the AIL. There is a race condition where the cluster buffer may be unpinned before the inode is inserted into the AIL during transaction committed processing. If the buffer is unpinned before the inode item has been committed and inserted, then it is possible for the buffer to be released and hence processthe stale inode callbacks before the inode is inserted into the AIL. In this case, we then insert a clean, stale inode into the AIL which will never get removed by an IO completion. It will, however, get reclaimed and that triggers an assert in xfs_inode_free() complaining about freeing an inode still in the AIL. This race can be avoided by not moving stale inodes forward in the AIL during transaction commit completion processing. This closes the race condition by ensuring we never insert clean stale inodes into the AIL. It is safe to do this because a dirty stale inode, by definition, must already be in the AIL. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig commit 309c848002052edbec650075a1eb098b17c17f35 Author: Dave Chinner Date: Tue Nov 30 15:16:02 2010 +1100 xfs: delayed alloc blocks beyond EOF are valid after writeback There is an assumption in the parts of XFS that flushing a dirty file will make all the delayed allocation blocks disappear from an inode. That is, that after calling xfs_flush_pages() then ip->i_delayed_blks will be zero. This is an invalid assumption as we may have specualtive preallocation beyond EOF and they are recorded in ip->i_delayed_blks. A flush of the dirty pages of an inode will not change the state of these blocks beyond EOF, so a non-zero deeelalloc block count after a flush is valid. The bmap code has an invalid ASSERT() that needs to be removed, and the swapext code has a bug in that while it swaps the data forks around, it fails to swap the i_delayed_blks counter associated with the fork and hence can get the block accounting wrong. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig commit 90810b9e82a36c3c57c1aeb8b2918b242a130b26 Author: Dave Chinner Date: Tue Nov 30 15:16:16 2010 +1100 xfs: push stale, pinned buffers on trylock failures As reported by Nick Piggin, XFS is suffering from long pauses under highly concurrent workloads when hosted on ramdisks. The problem is that an inode buffer is stuck in the pinned state in memory and as a result either the inode buffer or one of the inodes within the buffer is stopping the tail of the log from being moved forward. The system remains in this state until a periodic log force issued by xfssyncd causes the buffer to be unpinned. The main problem is that these are stale buffers, and are hence held locked until the transaction/checkpoint that marked them state has been committed to disk. When the filesystem gets into this state, only the xfssyncd can cause the async transactions to be committed to disk and hence unpin the inode buffer. This problem was encountered when scaling the busy extent list, but only the blocking lock interface was fixed to solve the problem. Extend the same fix to the buffer trylock operations - if we fail to lock a pinned, stale buffer, then force the log immediately so that when the next attempt to lock it comes around, it will have been unpinned. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig commit c726de4409a8d3a03877b1ef4342bfe8a15f5e5e Author: Dave Chinner Date: Tue Nov 30 15:14:39 2010 +1100 xfs: fix failed write truncation handling. Since the move to the new truncate sequence we call xfs_setattr to truncate down excessively instanciated blocks. As shown by the testcase in kernel.org BZ #22452 that doesn't work too well. Due to the confusion of the internal inode size, and the VFS inode i_size it zeroes data that it shouldn't. But full blown truncate seems like overkill here. We only instanciate delayed allocations in the write path, and given that we never released the iolock we can't have converted them to real allocations yet either. The only nasty case is pre-existing preallocation which we need to skip. We already do this for page discard during writeback, so make the delayed allocation block punching a generic function and call it from the failed write path as well as xfs_aops_discard_page. The callers are responsible for ensuring that partial blocks are not truncated away, and that they hold the ilock. Based on a fix originally from Christoph Hellwig. This version used filesystem blocks as the range unit. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig ----------------------------------------------------------------------- Summary of changes: fs/xfs/linux-2.6/xfs_aops.c | 94 ++++++++++++++++++------------------------ fs/xfs/linux-2.6/xfs_buf.c | 35 +++++++--------- fs/xfs/xfs_bmap.c | 85 ++++++++++++++++++++++++++++++++++++++- fs/xfs/xfs_bmap.h | 5 ++ fs/xfs/xfs_dfrag.c | 13 ++++++ fs/xfs/xfs_error.c | 3 + fs/xfs/xfs_error.h | 5 +- fs/xfs/xfs_inode_item.c | 31 +++++++++++--- 8 files changed, 188 insertions(+), 83 deletions(-) hooks/post-receive -- XFS development tree From aelder@oss.sgi.com Wed Dec 1 14:54:11 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-0.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from oss.sgi.com (localhost [127.0.0.1]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1KsBnB233672 for ; Wed, 1 Dec 2010 14:54:11 -0600 Received: (from aelder@localhost) by oss.sgi.com (8.14.3/8.14.3/Submit) id oB1Ks9h4233622; Wed, 1 Dec 2010 14:54:09 -0600 Date: Wed, 1 Dec 2010 14:54:09 -0600 Message-Id: <201012012054.oB1Ks9h4233622@oss.sgi.com> From: xfs@oss.sgi.com To: xfs@oss.sgi.com Subject: [XFS updates] XFS development tree branch, for-linus, updated. v2.6.36-rc8-11223-gc76febe X-Git-Refname: refs/heads/for-linus X-Git-Reftype: branch X-Git-Oldrev: ece413f59f257682de4a2e2e42af33b016af53f3 X-Git-Newrev: c76febef574fd86566bbdf1a73a547a439115c25 This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "XFS development tree". The branch, for-linus has been updated c76febe xfs: only run xfs_error_test if error injection is active de25c18 xfs: avoid moving stale inodes in the AIL 309c848 xfs: delayed alloc blocks beyond EOF are valid after writeback 90810b9 xfs: push stale, pinned buffers on trylock failures c726de4 xfs: fix failed write truncation handling. from ece413f59f257682de4a2e2e42af33b016af53f3 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit c76febef574fd86566bbdf1a73a547a439115c25 Author: Dave Chinner Date: Tue Nov 30 15:15:31 2010 +1100 xfs: only run xfs_error_test if error injection is active Recent tests writing lots of small files showed the flusher thread being CPU bound and taking a long time to do allocations on a debug kernel. perf showed this as the prime reason: samples pcnt function DSO _______ _____ ___________________________ _________________ 224648.00 36.8% xfs_error_test [kernel.kallsyms] 86045.00 14.1% xfs_btree_check_sblock [kernel.kallsyms] 39778.00 6.5% prandom32 [kernel.kallsyms] 37436.00 6.1% xfs_btree_increment [kernel.kallsyms] 29278.00 4.8% xfs_btree_get_rec [kernel.kallsyms] 27717.00 4.5% random32 [kernel.kallsyms] Walking btree blocks during allocation checking them requires each block (a cache hit, so no I/O) call xfs_error_test(), which then does a random32() call as the first operation. IOWs, ~50% of the CPU is being consumed just testing whether we need to inject an error, even though error injection is not active. Kill this overhead when error injection is not active by adding a global counter of active error traps and only calling into xfs_error_test when fault injection is active. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig commit de25c1818c44f580ff556cb9e0f7a1c687ed870b Author: Dave Chinner Date: Tue Nov 30 15:15:46 2010 +1100 xfs: avoid moving stale inodes in the AIL When an inode has been marked stale because the cluster is being freed, we don't want to (re-)insert this inode into the AIL. There is a race condition where the cluster buffer may be unpinned before the inode is inserted into the AIL during transaction committed processing. If the buffer is unpinned before the inode item has been committed and inserted, then it is possible for the buffer to be released and hence processthe stale inode callbacks before the inode is inserted into the AIL. In this case, we then insert a clean, stale inode into the AIL which will never get removed by an IO completion. It will, however, get reclaimed and that triggers an assert in xfs_inode_free() complaining about freeing an inode still in the AIL. This race can be avoided by not moving stale inodes forward in the AIL during transaction commit completion processing. This closes the race condition by ensuring we never insert clean stale inodes into the AIL. It is safe to do this because a dirty stale inode, by definition, must already be in the AIL. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig commit 309c848002052edbec650075a1eb098b17c17f35 Author: Dave Chinner Date: Tue Nov 30 15:16:02 2010 +1100 xfs: delayed alloc blocks beyond EOF are valid after writeback There is an assumption in the parts of XFS that flushing a dirty file will make all the delayed allocation blocks disappear from an inode. That is, that after calling xfs_flush_pages() then ip->i_delayed_blks will be zero. This is an invalid assumption as we may have specualtive preallocation beyond EOF and they are recorded in ip->i_delayed_blks. A flush of the dirty pages of an inode will not change the state of these blocks beyond EOF, so a non-zero deeelalloc block count after a flush is valid. The bmap code has an invalid ASSERT() that needs to be removed, and the swapext code has a bug in that while it swaps the data forks around, it fails to swap the i_delayed_blks counter associated with the fork and hence can get the block accounting wrong. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig commit 90810b9e82a36c3c57c1aeb8b2918b242a130b26 Author: Dave Chinner Date: Tue Nov 30 15:16:16 2010 +1100 xfs: push stale, pinned buffers on trylock failures As reported by Nick Piggin, XFS is suffering from long pauses under highly concurrent workloads when hosted on ramdisks. The problem is that an inode buffer is stuck in the pinned state in memory and as a result either the inode buffer or one of the inodes within the buffer is stopping the tail of the log from being moved forward. The system remains in this state until a periodic log force issued by xfssyncd causes the buffer to be unpinned. The main problem is that these are stale buffers, and are hence held locked until the transaction/checkpoint that marked them state has been committed to disk. When the filesystem gets into this state, only the xfssyncd can cause the async transactions to be committed to disk and hence unpin the inode buffer. This problem was encountered when scaling the busy extent list, but only the blocking lock interface was fixed to solve the problem. Extend the same fix to the buffer trylock operations - if we fail to lock a pinned, stale buffer, then force the log immediately so that when the next attempt to lock it comes around, it will have been unpinned. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig commit c726de4409a8d3a03877b1ef4342bfe8a15f5e5e Author: Dave Chinner Date: Tue Nov 30 15:14:39 2010 +1100 xfs: fix failed write truncation handling. Since the move to the new truncate sequence we call xfs_setattr to truncate down excessively instanciated blocks. As shown by the testcase in kernel.org BZ #22452 that doesn't work too well. Due to the confusion of the internal inode size, and the VFS inode i_size it zeroes data that it shouldn't. But full blown truncate seems like overkill here. We only instanciate delayed allocations in the write path, and given that we never released the iolock we can't have converted them to real allocations yet either. The only nasty case is pre-existing preallocation which we need to skip. We already do this for page discard during writeback, so make the delayed allocation block punching a generic function and call it from the failed write path as well as xfs_aops_discard_page. The callers are responsible for ensuring that partial blocks are not truncated away, and that they hold the ilock. Based on a fix originally from Christoph Hellwig. This version used filesystem blocks as the range unit. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig ----------------------------------------------------------------------- Summary of changes: fs/xfs/linux-2.6/xfs_aops.c | 94 ++++++++++++++++++------------------------ fs/xfs/linux-2.6/xfs_buf.c | 35 +++++++--------- fs/xfs/xfs_bmap.c | 85 ++++++++++++++++++++++++++++++++++++++- fs/xfs/xfs_bmap.h | 5 ++ fs/xfs/xfs_dfrag.c | 13 ++++++ fs/xfs/xfs_error.c | 3 + fs/xfs/xfs_error.h | 5 +- fs/xfs/xfs_inode_item.c | 31 +++++++++++--- 8 files changed, 188 insertions(+), 83 deletions(-) hooks/post-receive -- XFS development tree From aelder@sgi.com Wed Dec 1 16:04:29 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1M4T16236283 for ; Wed, 1 Dec 2010 16:04:29 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id 4D2F3AC006; Wed, 1 Dec 2010 14:06:10 -0800 (PST) Received: from [127.0.0.1] ([198.149.20.12]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 1 Dec 2010 16:05:59 -0600 Subject: Re: [XFS updates] XFS development tree branch, master, updated. v2.6.36-rc8-11223-gc76febe From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Cc: Dave Chinner In-Reply-To: <201012012054.oB1Ks0NA233500@oss.sgi.com> References: <201012012054.oB1Ks0NA233500@oss.sgi.com> Content-Type: text/plain; charset="UTF-8" Date: Wed, 01 Dec 2010 16:05:58 -0600 Message-ID: <1291241158.2556.54.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 01 Dec 2010 22:05:59.0494 (UTC) FILETIME=[EF8DDE60:01CB91A3] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, 2010-12-01 at 14:54 -0600, xfs@oss.sgi.com wrote: > This is an automated email from the git hooks/post-receive script. It was > generated because a ref change was pushed to the repository containing > the project "XFS development tree". > > The branch, master has been updated > c76febe xfs: only run xfs_error_test if error injection is active > de25c18 xfs: avoid moving stale inodes in the AIL > 309c848 xfs: delayed alloc blocks beyond EOF are valid after writeback > 90810b9 xfs: push stale, pinned buffers on trylock failures > c726de4 xfs: fix failed write truncation handling. > from ece413f59f257682de4a2e2e42af33b016af53f3 (commit) > > Those revisions listed above that are new to this repository have > not appeared on any other notification email; so we list those > revisions in full, below. . . . I have updated the XFS master branch to be based on 6.2.37-rc4. The only commits that were rebased were those I just took in from Dave Chinner's xfsdev tree, so unless you have work based on that branch you should not need to do anything special to update your local repository. -Alex From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 16:05:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_65 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1M5RAC236334 for ; Wed, 1 Dec 2010 16:05:29 -0600 X-ASG-Debug-ID: 1291241231-3479026e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A9F824F05FE for ; Wed, 1 Dec 2010 14:07:11 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id UinowJwox2Ql2NWa for ; Wed, 01 Dec 2010 14:07:11 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNupS-0007mj-2r for xfs@oss.sgi.com; Wed, 01 Dec 2010 22:07:10 +0000 Message-Id: <20101201220710.042656730@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Wed, 01 Dec 2010 17:06:21 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 1/4] xfs: remove leftovers of old buffer log items in recovery code Subject: [PATCH 1/4] xfs: remove leftovers of old buffer log items in recovery code References: <20101201220620.340188389@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-remove-blf_type-switches X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291241231 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean XFS used to support different types of buffer log items long time ago. Remove the switch statements checking the log item type in various buffer recovery helpers that were left over from those days and the rather useless xlog_recover_do_buffer_pass2 wrapper. Signed-off-by: Christoph Hellwig Index: xfs/fs/xfs/xfs_log_recover.c =================================================================== --- xfs.orig/fs/xfs/xfs_log_recover.c 2010-11-29 15:06:43.921010269 +0100 +++ xfs/fs/xfs/xfs_log_recover.c 2010-11-29 16:33:20.495004054 +0100 @@ -1614,22 +1614,13 @@ xlog_recover_do_buffer_pass1( xfs_buf_cancel_t *nextp; xfs_buf_cancel_t *prevp; xfs_buf_cancel_t **bucket; - xfs_daddr_t blkno = 0; - uint len = 0; - ushort flags = 0; - - switch (buf_f->blf_type) { - case XFS_LI_BUF: - blkno = buf_f->blf_blkno; - len = buf_f->blf_len; - flags = buf_f->blf_flags; - break; - } + xfs_daddr_t blkno = buf_f->blf_blkno; + uint len = buf_f->blf_len; /* * If this isn't a cancel buffer item, then just return. */ - if (!(flags & XFS_BLF_CANCEL)) { + if (!(buf_f->blf_flags & XFS_BLF_CANCEL)) { trace_xfs_log_recover_buf_not_cancel(log, buf_f); return; } @@ -1767,77 +1758,38 @@ xlog_check_buffer_cancelled( return 0; } -STATIC int -xlog_recover_do_buffer_pass2( - xlog_t *log, - xfs_buf_log_format_t *buf_f) -{ - xfs_daddr_t blkno = 0; - ushort flags = 0; - uint len = 0; - - switch (buf_f->blf_type) { - case XFS_LI_BUF: - blkno = buf_f->blf_blkno; - flags = buf_f->blf_flags; - len = buf_f->blf_len; - break; - } - - return xlog_check_buffer_cancelled(log, blkno, len, flags); -} - /* - * Perform recovery for a buffer full of inodes. In these buffers, - * the only data which should be recovered is that which corresponds - * to the di_next_unlinked pointers in the on disk inode structures. - * The rest of the data for the inodes is always logged through the - * inodes themselves rather than the inode buffer and is recovered - * in xlog_recover_do_inode_trans(). + * Perform recovery for a buffer full of inodes. In these buffers, the only + * data which should be recovered is that which corresponds to the + * di_next_unlinked pointers in the on disk inode structures. The rest of the + * data for the inodes is always logged through the inodes themselves rather + * than the inode buffer and is recovered in xlog_recover_inode_pass2(). * - * The only time when buffers full of inodes are fully recovered is - * when the buffer is full of newly allocated inodes. In this case - * the buffer will not be marked as an inode buffer and so will be - * sent to xlog_recover_do_reg_buffer() below during recovery. + * The only time when buffers full of inodes are fully recovered is when the + * buffer is full of newly allocated inodes. In this case the buffer will + * not be marked as an inode buffer and so will be sent to + * xlog_recover_do_reg_buffer() below during recovery. */ STATIC int xlog_recover_do_inode_buffer( - xfs_mount_t *mp, + struct xfs_mount *mp, xlog_recover_item_t *item, - xfs_buf_t *bp, + struct xfs_buf *bp, xfs_buf_log_format_t *buf_f) { int i; - int item_index; - int bit; - int nbits; - int reg_buf_offset; - int reg_buf_bytes; + int item_index = 0; + int bit = 0; + int nbits = 0; + int reg_buf_offset = 0; + int reg_buf_bytes = 0; int next_unlinked_offset; int inodes_per_buf; xfs_agino_t *logged_nextp; xfs_agino_t *buffer_nextp; - unsigned int *data_map = NULL; - unsigned int map_size = 0; trace_xfs_log_recover_buf_inode_buf(mp->m_log, buf_f); - switch (buf_f->blf_type) { - case XFS_LI_BUF: - data_map = buf_f->blf_data_map; - map_size = buf_f->blf_map_size; - break; - } - /* - * Set the variables corresponding to the current region to - * 0 so that we'll initialize them on the first pass through - * the loop. - */ - reg_buf_offset = 0; - reg_buf_bytes = 0; - bit = 0; - nbits = 0; - item_index = 0; inodes_per_buf = XFS_BUF_COUNT(bp) >> mp->m_sb.sb_inodelog; for (i = 0; i < inodes_per_buf; i++) { next_unlinked_offset = (i * mp->m_sb.sb_inodesize) + @@ -1852,18 +1804,18 @@ xlog_recover_do_inode_buffer( * the current di_next_unlinked field. */ bit += nbits; - bit = xfs_next_bit(data_map, map_size, bit); + bit = xfs_next_bit(buf_f->blf_data_map, + buf_f->blf_map_size, bit); /* * If there are no more logged regions in the * buffer, then we're done. */ - if (bit == -1) { + if (bit == -1) return 0; - } - nbits = xfs_contig_bits(data_map, map_size, - bit); + nbits = xfs_contig_bits(buf_f->blf_data_map, + buf_f->blf_map_size, bit); ASSERT(nbits > 0); reg_buf_offset = bit << XFS_BLF_SHIFT; reg_buf_bytes = nbits << XFS_BLF_SHIFT; @@ -1875,9 +1827,8 @@ xlog_recover_do_inode_buffer( * di_next_unlinked field, then move on to the next * di_next_unlinked field. */ - if (next_unlinked_offset < reg_buf_offset) { + if (next_unlinked_offset < reg_buf_offset) continue; - } ASSERT(item->ri_buf[item_index].i_addr != NULL); ASSERT((item->ri_buf[item_index].i_len % XFS_BLF_CHUNK) == 0); @@ -1913,36 +1864,29 @@ xlog_recover_do_inode_buffer( * given buffer. The bitmap in the buf log format structure indicates * where to place the logged data. */ -/*ARGSUSED*/ STATIC void xlog_recover_do_reg_buffer( struct xfs_mount *mp, xlog_recover_item_t *item, - xfs_buf_t *bp, + struct xfs_buf *bp, xfs_buf_log_format_t *buf_f) { int i; int bit; int nbits; - unsigned int *data_map = NULL; - unsigned int map_size = 0; int error; trace_xfs_log_recover_buf_reg_buf(mp->m_log, buf_f); - switch (buf_f->blf_type) { - case XFS_LI_BUF: - data_map = buf_f->blf_data_map; - map_size = buf_f->blf_map_size; - break; - } bit = 0; i = 1; /* 0 is the buf format structure */ while (1) { - bit = xfs_next_bit(data_map, map_size, bit); + bit = xfs_next_bit(buf_f->blf_data_map, + buf_f->blf_map_size, bit); if (bit == -1) break; - nbits = xfs_contig_bits(data_map, map_size, bit); + nbits = xfs_contig_bits(buf_f->blf_data_map, + buf_f->blf_map_size, bit); ASSERT(nbits > 0); ASSERT(item->ri_buf[i].i_addr != NULL); ASSERT(item->ri_buf[i].i_len % XFS_BLF_CHUNK == 0); @@ -2182,13 +2126,9 @@ xlog_recover_do_buffer_trans( int pass) { xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; - xfs_mount_t *mp; + xfs_mount_t *mp = log->l_mp; xfs_buf_t *bp; int error; - int cancel; - xfs_daddr_t blkno; - int len; - ushort flags; uint buf_flags; if (pass == XLOG_RECOVER_PASS1) { @@ -2206,47 +2146,32 @@ xlog_recover_do_buffer_trans( * we call here will tell us whether or not to * continue with the replay of this buffer. */ - cancel = xlog_recover_do_buffer_pass2(log, buf_f); - if (cancel) { + if (xlog_check_buffer_cancelled(log, buf_f->blf_blkno, + buf_f->blf_len, buf_f->blf_flags)) { trace_xfs_log_recover_buf_cancel(log, buf_f); return 0; } } trace_xfs_log_recover_buf_recover(log, buf_f); - switch (buf_f->blf_type) { - case XFS_LI_BUF: - blkno = buf_f->blf_blkno; - len = buf_f->blf_len; - flags = buf_f->blf_flags; - break; - default: - xfs_fs_cmn_err(CE_ALERT, log->l_mp, - "xfs_log_recover: unknown buffer type 0x%x, logdev %s", - buf_f->blf_type, log->l_mp->m_logname ? - log->l_mp->m_logname : "internal"); - XFS_ERROR_REPORT("xlog_recover_do_buffer_trans", - XFS_ERRLEVEL_LOW, log->l_mp); - return XFS_ERROR(EFSCORRUPTED); - } - mp = log->l_mp; buf_flags = XBF_LOCK; - if (!(flags & XFS_BLF_INODE_BUF)) + if (!(buf_f->blf_flags & XFS_BLF_INODE_BUF)) buf_flags |= XBF_MAPPED; - bp = xfs_buf_read(mp->m_ddev_targp, blkno, len, buf_flags); + bp = xfs_buf_read(mp->m_ddev_targp, buf_f->blf_blkno, buf_f->blf_len, + buf_flags); if (XFS_BUF_ISERROR(bp)) { - xfs_ioerror_alert("xlog_recover_do..(read#1)", log->l_mp, - bp, blkno); + xfs_ioerror_alert("xlog_recover_do..(read#1)", mp, + bp, buf_f->blf_blkno); error = XFS_BUF_GETERROR(bp); xfs_buf_relse(bp); return error; } error = 0; - if (flags & XFS_BLF_INODE_BUF) { + if (buf_f->blf_flags & XFS_BLF_INODE_BUF) { error = xlog_recover_do_inode_buffer(mp, item, bp, buf_f); - } else if (flags & + } else if (buf_f->blf_flags & (XFS_BLF_UDQUOT_BUF|XFS_BLF_PDQUOT_BUF|XFS_BLF_GDQUOT_BUF)) { xlog_recover_do_dquot_buffer(mp, log, item, bp, buf_f); } else { From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 16:05:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1M5Su1236341 for ; Wed, 1 Dec 2010 16:05:30 -0600 X-ASG-Debug-ID: 1291241232-4a1903160000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 6C7E91609CBA for ; Wed, 1 Dec 2010 14:07:12 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id MJc2InuiI1XHceIf for ; Wed, 01 Dec 2010 14:07:12 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNupS-0007nl-GC for xfs@oss.sgi.com; Wed, 01 Dec 2010 22:07:10 +0000 Message-Id: <20101201220710.454838485@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Wed, 01 Dec 2010 17:06:23 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 3/4] xfs: refactor xlog_recover_commit_trans Subject: [PATCH 3/4] xfs: refactor xlog_recover_commit_trans References: <20101201220620.340188389@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-cleanup-xlog_recover_commit_trans X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291241232 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Merge the call to xlog_recover_reorder_trans and the loop over the recovery items from xlog_recover_do_trans into xlog_recover_commit_trans, and keep the switch statement over the log item types as a separate helper. Signed-off-by: Christoph Hellwig Index: xfs/fs/xfs/xfs_log_recover.c =================================================================== --- xfs.orig/fs/xfs/xfs_log_recover.c 2010-11-29 15:15:58.174005517 +0100 +++ xfs/fs/xfs/xfs_log_recover.c 2010-11-29 15:27:26.298253879 +0100 @@ -2674,71 +2674,13 @@ xlog_recover_do_efd_trans( } /* - * Perform the transaction - * - * If the transaction modifies a buffer or inode, do it now. Otherwise, - * EFIs and EFDs get queued up by adding entries into the AIL for them. - */ -STATIC int -xlog_recover_do_trans( - xlog_t *log, - xlog_recover_t *trans, - int pass) -{ - int error = 0; - xlog_recover_item_t *item; - - error = xlog_recover_reorder_trans(log, trans, pass); - if (error) - return error; - - list_for_each_entry(item, &trans->r_itemq, ri_list) { - trace_xfs_log_recover_item_recover(log, trans, item, pass); - switch (ITEM_TYPE(item)) { - case XFS_LI_BUF: - error = xlog_recover_do_buffer_trans(log, item, pass); - break; - case XFS_LI_INODE: - error = xlog_recover_do_inode_trans(log, item, pass); - break; - case XFS_LI_EFI: - error = xlog_recover_do_efi_trans(log, item, - trans->r_lsn, pass); - break; - case XFS_LI_EFD: - xlog_recover_do_efd_trans(log, item, pass); - error = 0; - break; - case XFS_LI_DQUOT: - error = xlog_recover_do_dquot_trans(log, item, pass); - break; - case XFS_LI_QUOTAOFF: - error = xlog_recover_do_quotaoff_trans(log, item, - pass); - break; - default: - xlog_warn( - "XFS: invalid item type (%d) xlog_recover_do_trans", ITEM_TYPE(item)); - ASSERT(0); - error = XFS_ERROR(EIO); - break; - } - - if (error) - return error; - } - - return 0; -} - -/* * Free up any resources allocated by the transaction * * Remember that EFIs, EFDs, and IUNLINKs are handled later. */ STATIC void xlog_recover_free_trans( - xlog_recover_t *trans) + struct xlog_recover *trans) { xlog_recover_item_t *item, *n; int i; @@ -2757,17 +2699,65 @@ xlog_recover_free_trans( } STATIC int +xlog_recover_commit_item( + struct log *log, + struct xlog_recover *trans, + xlog_recover_item_t *item, + int pass) +{ + trace_xfs_log_recover_item_recover(log, trans, item, pass); + + switch (ITEM_TYPE(item)) { + case XFS_LI_BUF: + return xlog_recover_do_buffer_trans(log, item, pass); + break; + case XFS_LI_INODE: + return xlog_recover_do_inode_trans(log, item, pass); + case XFS_LI_EFI: + return xlog_recover_do_efi_trans(log, item, trans->r_lsn, pass); + case XFS_LI_EFD: + xlog_recover_do_efd_trans(log, item, pass); + return 0; + case XFS_LI_DQUOT: + return xlog_recover_do_dquot_trans(log, item, pass); + case XFS_LI_QUOTAOFF: + return xlog_recover_do_quotaoff_trans(log, item, pass); + default: + xlog_warn( + "XFS: invalid item type (%d) xlog_recover_do_trans", ITEM_TYPE(item)); + ASSERT(0); + return XFS_ERROR(EIO); + } +} + +/* + * Perform the transaction. + * + * If the transaction modifies a buffer or inode, do it now. Otherwise, + * EFIs and EFDs get queued up by adding entries into the AIL for them. + */ +STATIC int xlog_recover_commit_trans( - xlog_t *log, - xlog_recover_t *trans, + struct log *log, + struct xlog_recover *trans, int pass) { - int error; + int error = 0; + xlog_recover_item_t *item; hlist_del(&trans->r_list); - if ((error = xlog_recover_do_trans(log, trans, pass))) + + error = xlog_recover_reorder_trans(log, trans, pass); + if (error) return error; - xlog_recover_free_trans(trans); /* no error */ + + list_for_each_entry(item, &trans->r_itemq, ri_list) { + error = xlog_recover_commit_item(log, trans, item, pass); + if (error) + return error; + } + + xlog_recover_free_trans(trans); return 0; } From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 16:05:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_65, J_CHICKENPOX_66 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1M5SwK236339 for ; Wed, 1 Dec 2010 16:05:30 -0600 X-ASG-Debug-ID: 1291241230-734701b40000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E14C91609CBA for ; Wed, 1 Dec 2010 14:07:11 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id HARdAZMiDfS4nfQr for ; Wed, 01 Dec 2010 14:07:11 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNupS-0007nF-9h for xfs@oss.sgi.com; Wed, 01 Dec 2010 22:07:10 +0000 Message-Id: <20101201220710.254521341@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Wed, 01 Dec 2010 17:06:22 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 2/4] xfs: use struct list_head for the buf cancel table Subject: [PATCH 2/4] xfs: use struct list_head for the buf cancel table References: <20101201220620.340188389@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-buf-cancel-list_head X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291241231 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Signed-off-by: Christoph Hellwig Index: xfs/fs/xfs/xfs_buf_item.h =================================================================== --- xfs.orig/fs/xfs/xfs_buf_item.h 2010-11-29 16:33:20.473005032 +0100 +++ xfs/fs/xfs/xfs_buf_item.h 2010-11-29 17:26:52.384003914 +0100 @@ -105,17 +105,6 @@ typedef struct xfs_buf_log_item { xfs_buf_log_format_t bli_format; /* in-log header */ } xfs_buf_log_item_t; -/* - * This structure is used during recovery to record the buf log - * items which have been canceled and should not be replayed. - */ -typedef struct xfs_buf_cancel { - xfs_daddr_t bc_blkno; - uint bc_len; - int bc_refcount; - struct xfs_buf_cancel *bc_next; -} xfs_buf_cancel_t; - void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *); void xfs_buf_item_relse(struct xfs_buf *); void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint); Index: xfs/fs/xfs/xfs_log_priv.h =================================================================== --- xfs.orig/fs/xfs/xfs_log_priv.h 2010-11-29 16:33:20.486010899 +0100 +++ xfs/fs/xfs/xfs_log_priv.h 2010-11-29 17:26:52.385003145 +0100 @@ -21,7 +21,6 @@ struct xfs_buf; struct log; struct xlog_ticket; -struct xfs_buf_cancel; struct xfs_mount; /* @@ -491,7 +490,7 @@ typedef struct log { struct xfs_buftarg *l_targ; /* buftarg of log */ uint l_flags; uint l_quotaoffs_flag; /* XFS_DQ_*, for QUOTAOFFs */ - struct xfs_buf_cancel **l_buf_cancel_table; + struct list_head *l_buf_cancel_table; int l_iclog_hsize; /* size of iclog header */ int l_iclog_heads; /* # of iclog header sectors */ uint l_sectBBsize; /* sector size in BBs (2^n) */ @@ -534,6 +533,9 @@ typedef struct log { } xlog_t; +#define XLOG_BUF_CANCEL_BUCKET(log, blkno) \ + ((log)->l_buf_cancel_table + ((__uint64_t)blkno % XLOG_BC_TABLE_SIZE)) + #define XLOG_FORCED_SHUTDOWN(log) ((log)->l_flags & XLOG_IO_ERROR) /* common routines */ Index: xfs/fs/xfs/xfs_log_recover.c =================================================================== --- xfs.orig/fs/xfs/xfs_log_recover.c 2010-11-29 16:33:20.495004054 +0100 +++ xfs/fs/xfs/xfs_log_recover.c 2010-11-29 17:31:12.135004894 +0100 @@ -53,6 +53,17 @@ STATIC void xlog_recover_check_summary(x #endif /* + * This structure is used during recovery to record the buf log items which + * have been canceled and should not be replayed. + */ +struct xfs_buf_cancel { + xfs_daddr_t bc_blkno; + uint bc_len; + int bc_refcount; + struct list_head bc_list; +}; + +/* * Sector aligned buffer routines for buffer create/read/write/access */ @@ -1607,15 +1618,11 @@ xlog_recover_reorder_trans( */ STATIC void xlog_recover_do_buffer_pass1( - xlog_t *log, + struct log *log, xfs_buf_log_format_t *buf_f) { - xfs_buf_cancel_t *bcp; - xfs_buf_cancel_t *nextp; - xfs_buf_cancel_t *prevp; - xfs_buf_cancel_t **bucket; - xfs_daddr_t blkno = buf_f->blf_blkno; - uint len = buf_f->blf_len; + struct list_head *bucket; + struct xfs_buf_cancel *bcp; /* * If this isn't a cancel buffer item, then just return. @@ -1626,51 +1633,25 @@ xlog_recover_do_buffer_pass1( } /* - * Insert an xfs_buf_cancel record into the hash table of - * them. If there is already an identical record, bump - * its reference count. - */ - bucket = &log->l_buf_cancel_table[(__uint64_t)blkno % - XLOG_BC_TABLE_SIZE]; - /* - * If the hash bucket is empty then just insert a new record into - * the bucket. - */ - if (*bucket == NULL) { - bcp = (xfs_buf_cancel_t *)kmem_alloc(sizeof(xfs_buf_cancel_t), - KM_SLEEP); - bcp->bc_blkno = blkno; - bcp->bc_len = len; - bcp->bc_refcount = 1; - bcp->bc_next = NULL; - *bucket = bcp; - return; - } - - /* - * The hash bucket is not empty, so search for duplicates of our - * record. If we find one them just bump its refcount. If not - * then add us at the end of the list. - */ - prevp = NULL; - nextp = *bucket; - while (nextp != NULL) { - if (nextp->bc_blkno == blkno && nextp->bc_len == len) { - nextp->bc_refcount++; + * Insert an xfs_buf_cancel record into the hash table of them. + * If there is already an identical record, bump its reference count. + */ + bucket = XLOG_BUF_CANCEL_BUCKET(log, buf_f->blf_blkno); + list_for_each_entry(bcp, bucket, bc_list) { + if (bcp->bc_blkno == buf_f->blf_blkno && + bcp->bc_len == buf_f->blf_len) { + bcp->bc_refcount++; trace_xfs_log_recover_buf_cancel_ref_inc(log, buf_f); return; } - prevp = nextp; - nextp = nextp->bc_next; } - ASSERT(prevp != NULL); - bcp = (xfs_buf_cancel_t *)kmem_alloc(sizeof(xfs_buf_cancel_t), - KM_SLEEP); - bcp->bc_blkno = blkno; - bcp->bc_len = len; + + bcp = kmem_alloc(sizeof(struct xfs_buf_cancel), KM_SLEEP); + bcp->bc_blkno = buf_f->blf_blkno; + bcp->bc_len = buf_f->blf_len; bcp->bc_refcount = 1; - bcp->bc_next = NULL; - prevp->bc_next = bcp; + list_add_tail(&bcp->bc_list, bucket); + trace_xfs_log_recover_buf_cancel_add(log, buf_f); } @@ -1689,14 +1670,13 @@ xlog_recover_do_buffer_pass1( */ STATIC int xlog_check_buffer_cancelled( - xlog_t *log, + struct log *log, xfs_daddr_t blkno, uint len, ushort flags) { - xfs_buf_cancel_t *bcp; - xfs_buf_cancel_t *prevp; - xfs_buf_cancel_t **bucket; + struct list_head *bucket; + struct xfs_buf_cancel *bcp; if (log->l_buf_cancel_table == NULL) { /* @@ -1707,55 +1687,36 @@ xlog_check_buffer_cancelled( return 0; } - bucket = &log->l_buf_cancel_table[(__uint64_t)blkno % - XLOG_BC_TABLE_SIZE]; - bcp = *bucket; - if (bcp == NULL) { - /* - * There is no corresponding entry in the table built - * in pass one, so this buffer has not been cancelled. - */ - ASSERT(!(flags & XFS_BLF_CANCEL)); - return 0; - } - /* - * Search for an entry in the buffer cancel table that - * matches our buffer. + * Search for an entry in the cancel table that matches our buffer. */ - prevp = NULL; - while (bcp != NULL) { - if (bcp->bc_blkno == blkno && bcp->bc_len == len) { - /* - * We've go a match, so return 1 so that the - * recovery of this buffer is cancelled. - * If this buffer is actually a buffer cancel - * log item, then decrement the refcount on the - * one in the table and remove it if this is the - * last reference. - */ - if (flags & XFS_BLF_CANCEL) { - bcp->bc_refcount--; - if (bcp->bc_refcount == 0) { - if (prevp == NULL) { - *bucket = bcp->bc_next; - } else { - prevp->bc_next = bcp->bc_next; - } - kmem_free(bcp); - } - } - return 1; - } - prevp = bcp; - bcp = bcp->bc_next; + bucket = XLOG_BUF_CANCEL_BUCKET(log, blkno); + list_for_each_entry(bcp, bucket, bc_list) { + if (bcp->bc_blkno == blkno && bcp->bc_len == len) + goto found; } + /* - * We didn't find a corresponding entry in the table, so - * return 0 so that the buffer is NOT cancelled. + * We didn't find a corresponding entry in the table, so return 0 so + * that the buffer is NOT cancelled. */ ASSERT(!(flags & XFS_BLF_CANCEL)); return 0; + +found: + /* + * We've go a match, so return 1 so that the recovery of this buffer + * is cancelled. If this buffer is actually a buffer cancel log + * item, then decrement the refcount on the one in the table and + * remove it if this is the last reference. + */ + if (flags & XFS_BLF_CANCEL) { + if (--bcp->bc_refcount == 0) { + list_del(&bcp->bc_list); + kmem_free(bcp); + } + } + return 1; } /* @@ -3649,7 +3610,7 @@ xlog_do_log_recovery( xfs_daddr_t head_blk, xfs_daddr_t tail_blk) { - int error; + int error, i; ASSERT(head_blk != tail_blk); @@ -3657,10 +3618,12 @@ xlog_do_log_recovery( * First do a pass to find all of the cancelled buf log items. * Store them in the buf_cancel_table for use in the second pass. */ - log->l_buf_cancel_table = - (xfs_buf_cancel_t **)kmem_zalloc(XLOG_BC_TABLE_SIZE * - sizeof(xfs_buf_cancel_t*), + log->l_buf_cancel_table = kmem_zalloc(XLOG_BC_TABLE_SIZE * + sizeof(struct list_head), KM_SLEEP); + for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) + INIT_LIST_HEAD(&log->l_buf_cancel_table[i]); + error = xlog_do_recovery_pass(log, head_blk, tail_blk, XLOG_RECOVER_PASS1); if (error != 0) { @@ -3679,7 +3642,7 @@ xlog_do_log_recovery( int i; for (i = 0; i < XLOG_BC_TABLE_SIZE; i++) - ASSERT(log->l_buf_cancel_table[i] == NULL); + ASSERT(list_empty(&log->l_buf_cancel_table[i])); } #endif /* DEBUG */ From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 16:05:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1M5STQ236342 for ; Wed, 1 Dec 2010 16:05:30 -0600 X-ASG-Debug-ID: 1291241232-734301db0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 6C97F1609CBE for ; Wed, 1 Dec 2010 14:07:12 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 3do7UuMchneZVKLZ for ; Wed, 01 Dec 2010 14:07:12 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNupR-0007m9-SE for xfs@oss.sgi.com; Wed, 01 Dec 2010 22:07:09 +0000 Message-Id: <20101201220620.340188389@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Wed, 01 Dec 2010 17:06:20 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 0/4] log recovery cleanups Subject: [PATCH 0/4] log recovery cleanups X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291241232 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean A couple of cleanups for the log recovery code that I stumbled upon when researching some improvements for the CRC cleanup. From BATV+3217d6c06e4d83826047+2656+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 1 16:05:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_66, LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB1M5RQt236332 for ; Wed, 1 Dec 2010 16:05:30 -0600 X-ASG-Debug-ID: 1291241230-3482028f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 5ADB44F05FE for ; Wed, 1 Dec 2010 14:07:11 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 2bOMalUQXXzbFOuE for ; Wed, 01 Dec 2010 14:07:11 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PNupS-0007oH-MP for xfs@oss.sgi.com; Wed, 01 Dec 2010 22:07:10 +0000 Message-Id: <20101201220710.647499265@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Wed, 01 Dec 2010 17:06:24 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 4/4] xfs: untangle phase1 vs phase2 recovery helpers Subject: [PATCH 4/4] xfs: untangle phase1 vs phase2 recovery helpers References: <20101201220620.340188389@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-split-log-recovery-passes X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291241231 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Dispatch to a different helper for phase1 vs phase2 in xlog_recover_commit_trans instead of doing it in all the low-level functions. Signed-off-by: Christoph Hellwig Index: xfs/fs/xfs/xfs_log_recover.c =================================================================== --- xfs.orig/fs/xfs/xfs_log_recover.c 2010-12-01 17:03:04.922253529 +0100 +++ xfs/fs/xfs/xfs_log_recover.c 2010-12-01 17:12:29.318255483 +0100 @@ -1616,11 +1616,12 @@ xlog_recover_reorder_trans( * record in the table to tell us how many times we expect to see this * record during the second pass. */ -STATIC void -xlog_recover_do_buffer_pass1( +STATIC int +xlog_recover_buffer_pass1( struct log *log, - xfs_buf_log_format_t *buf_f) + xlog_recover_item_t *item) { + xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; struct list_head *bucket; struct xfs_buf_cancel *bcp; @@ -1629,7 +1630,7 @@ xlog_recover_do_buffer_pass1( */ if (!(buf_f->blf_flags & XFS_BLF_CANCEL)) { trace_xfs_log_recover_buf_not_cancel(log, buf_f); - return; + return 0; } /* @@ -1642,7 +1643,7 @@ xlog_recover_do_buffer_pass1( bcp->bc_len == buf_f->blf_len) { bcp->bc_refcount++; trace_xfs_log_recover_buf_cancel_ref_inc(log, buf_f); - return; + return 0; } } @@ -1653,6 +1654,7 @@ xlog_recover_do_buffer_pass1( list_add_tail(&bcp->bc_list, bucket); trace_xfs_log_recover_buf_cancel_add(log, buf_f); + return 0; } /* @@ -2081,10 +2083,9 @@ xlog_recover_do_dquot_buffer( * for more details on the implementation of the table of cancel records. */ STATIC int -xlog_recover_do_buffer_trans( +xlog_recover_buffer_pass2( xlog_t *log, - xlog_recover_item_t *item, - int pass) + xlog_recover_item_t *item) { xfs_buf_log_format_t *buf_f = item->ri_buf[0].i_addr; xfs_mount_t *mp = log->l_mp; @@ -2092,27 +2093,16 @@ xlog_recover_do_buffer_trans( int error; uint buf_flags; - if (pass == XLOG_RECOVER_PASS1) { - /* - * In this pass we're only looking for buf items - * with the XFS_BLF_CANCEL bit set. - */ - xlog_recover_do_buffer_pass1(log, buf_f); + /* + * In this pass we only want to recover all the buffers which have + * not been cancelled and are not cancellation buffers themselves. + */ + if (xlog_check_buffer_cancelled(log, buf_f->blf_blkno, + buf_f->blf_len, buf_f->blf_flags)) { + trace_xfs_log_recover_buf_cancel(log, buf_f); return 0; - } else { - /* - * In this pass we want to recover all the buffers - * which have not been cancelled and are not - * cancellation buffers themselves. The routine - * we call here will tell us whether or not to - * continue with the replay of this buffer. - */ - if (xlog_check_buffer_cancelled(log, buf_f->blf_blkno, - buf_f->blf_len, buf_f->blf_flags)) { - trace_xfs_log_recover_buf_cancel(log, buf_f); - return 0; - } } + trace_xfs_log_recover_buf_recover(log, buf_f); buf_flags = XBF_LOCK; @@ -2172,16 +2162,14 @@ xlog_recover_do_buffer_trans( } STATIC int -xlog_recover_do_inode_trans( +xlog_recover_inode_pass2( xlog_t *log, - xlog_recover_item_t *item, - int pass) + xlog_recover_item_t *item) { xfs_inode_log_format_t *in_f; - xfs_mount_t *mp; + xfs_mount_t *mp = log->l_mp; xfs_buf_t *bp; xfs_dinode_t *dip; - xfs_ino_t ino; int len; xfs_caddr_t src; xfs_caddr_t dest; @@ -2191,10 +2179,6 @@ xlog_recover_do_inode_trans( xfs_icdinode_t *dicp; int need_free = 0; - if (pass == XLOG_RECOVER_PASS1) { - return 0; - } - if (item->ri_buf[0].i_len == sizeof(xfs_inode_log_format_t)) { in_f = item->ri_buf[0].i_addr; } else { @@ -2204,8 +2188,6 @@ xlog_recover_do_inode_trans( if (error) goto error; } - ino = in_f->ilf_ino; - mp = log->l_mp; /* * Inode buffers can be freed, look out for it, @@ -2240,8 +2222,8 @@ xlog_recover_do_inode_trans( xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad inode magic number, dino ptr = 0x%p, dino bp = 0x%p, ino = %Ld", - dip, bp, ino); - XFS_ERROR_REPORT("xlog_recover_do_inode_trans(1)", + dip, bp, in_f->ilf_ino); + XFS_ERROR_REPORT("xlog_recover_inode_pass2(1)", XFS_ERRLEVEL_LOW, mp); error = EFSCORRUPTED; goto error; @@ -2251,8 +2233,8 @@ xlog_recover_do_inode_trans( xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad inode log record, rec ptr 0x%p, ino %Ld", - item, ino); - XFS_ERROR_REPORT("xlog_recover_do_inode_trans(2)", + item, in_f->ilf_ino); + XFS_ERROR_REPORT("xlog_recover_inode_pass2(2)", XFS_ERRLEVEL_LOW, mp); error = EFSCORRUPTED; goto error; @@ -2280,12 +2262,12 @@ xlog_recover_do_inode_trans( if (unlikely((dicp->di_mode & S_IFMT) == S_IFREG)) { if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && (dicp->di_format != XFS_DINODE_FMT_BTREE)) { - XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(3)", + XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(3)", XFS_ERRLEVEL_LOW, mp, dicp); xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad regular inode log record, rec ptr 0x%p, ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", - item, dip, bp, ino); + item, dip, bp, in_f->ilf_ino); error = EFSCORRUPTED; goto error; } @@ -2293,40 +2275,40 @@ xlog_recover_do_inode_trans( if ((dicp->di_format != XFS_DINODE_FMT_EXTENTS) && (dicp->di_format != XFS_DINODE_FMT_BTREE) && (dicp->di_format != XFS_DINODE_FMT_LOCAL)) { - XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(4)", + XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(4)", XFS_ERRLEVEL_LOW, mp, dicp); xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad dir inode log record, rec ptr 0x%p, ino ptr = 0x%p, ino bp = 0x%p, ino %Ld", - item, dip, bp, ino); + item, dip, bp, in_f->ilf_ino); error = EFSCORRUPTED; goto error; } } if (unlikely(dicp->di_nextents + dicp->di_anextents > dicp->di_nblocks)){ - XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(5)", + XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(5)", XFS_ERRLEVEL_LOW, mp, dicp); xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad inode log record, rec ptr 0x%p, dino ptr 0x%p, dino bp 0x%p, ino %Ld, total extents = %d, nblocks = %Ld", - item, dip, bp, ino, + item, dip, bp, in_f->ilf_ino, dicp->di_nextents + dicp->di_anextents, dicp->di_nblocks); error = EFSCORRUPTED; goto error; } if (unlikely(dicp->di_forkoff > mp->m_sb.sb_inodesize)) { - XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(6)", + XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(6)", XFS_ERRLEVEL_LOW, mp, dicp); xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, "xfs_inode_recover: Bad inode log rec ptr 0x%p, dino ptr 0x%p, dino bp 0x%p, ino %Ld, forkoff 0x%x", - item, dip, bp, ino, dicp->di_forkoff); + item, dip, bp, in_f->ilf_ino, dicp->di_forkoff); error = EFSCORRUPTED; goto error; } if (unlikely(item->ri_buf[1].i_len > sizeof(struct xfs_icdinode))) { - XFS_CORRUPTION_ERROR("xlog_recover_do_inode_trans(7)", + XFS_CORRUPTION_ERROR("xlog_recover_inode_pass2(7)", XFS_ERRLEVEL_LOW, mp, dicp); xfs_buf_relse(bp); xfs_fs_cmn_err(CE_ALERT, mp, @@ -2418,7 +2400,7 @@ xlog_recover_do_inode_trans( break; default: - xlog_warn("XFS: xlog_recover_do_inode_trans: Invalid flag"); + xlog_warn("XFS: xlog_recover_inode_pass2: Invalid flag"); ASSERT(0); xfs_buf_relse(bp); error = EIO; @@ -2442,18 +2424,11 @@ error: * of that type. */ STATIC int -xlog_recover_do_quotaoff_trans( +xlog_recover_quotaoff_pass1( xlog_t *log, - xlog_recover_item_t *item, - int pass) + xlog_recover_item_t *item) { - xfs_qoff_logformat_t *qoff_f; - - if (pass == XLOG_RECOVER_PASS2) { - return (0); - } - - qoff_f = item->ri_buf[0].i_addr; + xfs_qoff_logformat_t *qoff_f = item->ri_buf[0].i_addr; ASSERT(qoff_f); /* @@ -2474,22 +2449,17 @@ xlog_recover_do_quotaoff_trans( * Recover a dquot record */ STATIC int -xlog_recover_do_dquot_trans( +xlog_recover_dquot_pass2( xlog_t *log, - xlog_recover_item_t *item, - int pass) + xlog_recover_item_t *item) { - xfs_mount_t *mp; + xfs_mount_t *mp = log->l_mp; xfs_buf_t *bp; struct xfs_disk_dquot *ddq, *recddq; int error; xfs_dq_logformat_t *dq_f; uint type; - if (pass == XLOG_RECOVER_PASS1) { - return 0; - } - mp = log->l_mp; /* * Filesystems are required to send in quota flags at mount time. @@ -2533,7 +2503,7 @@ xlog_recover_do_dquot_trans( if ((error = xfs_qm_dqcheck(recddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, - "xlog_recover_do_dquot_trans (log copy)"))) { + "xlog_recover_dquot_pass2 (log copy)"))) { return XFS_ERROR(EIO); } ASSERT(dq_f->qlf_len == 1); @@ -2556,7 +2526,7 @@ xlog_recover_do_dquot_trans( * minimal initialization then. */ if (xfs_qm_dqcheck(ddq, dq_f->qlf_id, 0, XFS_QMOPT_DOWARN, - "xlog_recover_do_dquot_trans")) { + "xlog_recover_dquot_pass2")) { xfs_buf_relse(bp); return XFS_ERROR(EIO); } @@ -2579,24 +2549,18 @@ xlog_recover_do_dquot_trans( * LSN. */ STATIC int -xlog_recover_do_efi_trans( +xlog_recover_efi_pass2( xlog_t *log, xlog_recover_item_t *item, - xfs_lsn_t lsn, - int pass) + xfs_lsn_t lsn) { int error; - xfs_mount_t *mp; + xfs_mount_t *mp = log->l_mp; xfs_efi_log_item_t *efip; xfs_efi_log_format_t *efi_formatp; - if (pass == XLOG_RECOVER_PASS1) { - return 0; - } - efi_formatp = item->ri_buf[0].i_addr; - mp = log->l_mp; efip = xfs_efi_init(mp, efi_formatp->efi_nextents); if ((error = xfs_efi_copy_format(&(item->ri_buf[0]), &(efip->efi_format)))) { @@ -2623,11 +2587,10 @@ xlog_recover_do_efi_trans( * efd format structure. If we find it, we remove the efi from the * AIL and free it. */ -STATIC void -xlog_recover_do_efd_trans( +STATIC int +xlog_recover_efd_pass2( xlog_t *log, - xlog_recover_item_t *item, - int pass) + xlog_recover_item_t *item) { xfs_efd_log_format_t *efd_formatp; xfs_efi_log_item_t *efip = NULL; @@ -2636,10 +2599,6 @@ xlog_recover_do_efd_trans( struct xfs_ail_cursor cur; struct xfs_ail *ailp = log->l_ailp; - if (pass == XLOG_RECOVER_PASS1) { - return; - } - efd_formatp = item->ri_buf[0].i_addr; ASSERT((item->ri_buf[0].i_len == (sizeof(xfs_efd_log_format_32_t) + ((efd_formatp->efd_nextents - 1) * sizeof(xfs_extent_32_t)))) || @@ -2671,6 +2630,8 @@ xlog_recover_do_efd_trans( } xfs_trans_ail_cursor_done(ailp, &cur); spin_unlock(&ailp->xa_lock); + + return 0; } /* @@ -2699,32 +2660,59 @@ xlog_recover_free_trans( } STATIC int -xlog_recover_commit_item( +xlog_recover_commit_pass1( struct log *log, struct xlog_recover *trans, - xlog_recover_item_t *item, - int pass) + xlog_recover_item_t *item) { - trace_xfs_log_recover_item_recover(log, trans, item, pass); + trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS1); switch (ITEM_TYPE(item)) { case XFS_LI_BUF: - return xlog_recover_do_buffer_trans(log, item, pass); - break; + return xlog_recover_buffer_pass1(log, item); + case XFS_LI_QUOTAOFF: + return xlog_recover_quotaoff_pass1(log, item); case XFS_LI_INODE: - return xlog_recover_do_inode_trans(log, item, pass); case XFS_LI_EFI: - return xlog_recover_do_efi_trans(log, item, trans->r_lsn, pass); case XFS_LI_EFD: - xlog_recover_do_efd_trans(log, item, pass); + case XFS_LI_DQUOT: + /* nothing to do in pass 1 */ return 0; + default: + xlog_warn( + "XFS: invalid item type (%d) xlog_recover_commit_pass1", + ITEM_TYPE(item)); + ASSERT(0); + return XFS_ERROR(EIO); + } +} + +STATIC int +xlog_recover_commit_pass2( + struct log *log, + struct xlog_recover *trans, + xlog_recover_item_t *item) +{ + trace_xfs_log_recover_item_recover(log, trans, item, XLOG_RECOVER_PASS2); + + switch (ITEM_TYPE(item)) { + case XFS_LI_BUF: + return xlog_recover_buffer_pass2(log, item); + case XFS_LI_INODE: + return xlog_recover_inode_pass2(log, item); + case XFS_LI_EFI: + return xlog_recover_efi_pass2(log, item, trans->r_lsn); + case XFS_LI_EFD: + return xlog_recover_efd_pass2(log, item); case XFS_LI_DQUOT: - return xlog_recover_do_dquot_trans(log, item, pass); + return xlog_recover_dquot_pass2(log, item); case XFS_LI_QUOTAOFF: - return xlog_recover_do_quotaoff_trans(log, item, pass); + /* nothing to do in pass2 */ + return 0; default: xlog_warn( - "XFS: invalid item type (%d) xlog_recover_do_trans", ITEM_TYPE(item)); + "XFS: invalid item type (%d) xlog_recover_commit_pass2", + ITEM_TYPE(item)); ASSERT(0); return XFS_ERROR(EIO); } @@ -2752,7 +2740,10 @@ xlog_recover_commit_trans( return error; list_for_each_entry(item, &trans->r_itemq, ri_list) { - error = xlog_recover_commit_item(log, trans, item, pass); + if (pass == XLOG_RECOVER_PASS1) + error = xlog_recover_commit_pass1(log, trans, item); + else + error = xlog_recover_commit_pass2(log, trans, item); if (error) return error; } From SRS0+W+pQ+5+fromorbit.com=david@internode.on.net Wed Dec 1 19:27:03 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB21R305243939 for ; Wed, 1 Dec 2010 19:27:03 -0600 X-ASG-Debug-ID: 1291253324-31bf01b60000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4EA8E160AA63 for ; Wed, 1 Dec 2010 17:28:45 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id 8bkHc1d6Coebwv3m for ; Wed, 01 Dec 2010 17:28:45 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 36992712-1927428 for multiple; Thu, 02 Dec 2010 11:58:43 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PNxyT-0006D8-Qo; Thu, 02 Dec 2010 12:28:41 +1100 Date: Thu, 2 Dec 2010 12:28:41 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 1/8] xfs: Pull EFI/EFD handling out from under the AIL lock Subject: Re: [PATCH 1/8] xfs: Pull EFI/EFD handling out from under the AIL lock Message-ID: <20101202012841.GL16922@dastard> References: <1290993152-20999-1-git-send-email-david@fromorbit.com> <1290993152-20999-2-git-send-email-david@fromorbit.com> <20101130201734.GA16079@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101130201734.GA16079@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1291253326 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48216 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Nov 30, 2010 at 03:17:34PM -0500, Christoph Hellwig wrote: > > - xfs_efi_init needs to initialize efi_next_extent using ATOMIC_INIT OK. > - there is a behaviour change about the xfs_trans_del_item call > in xfs_efi_item_unpin - before it was protected by the > XFS_EFI_CANCELED which was never set, and now it's not. XFS_EFI_CANCELED has not been set in the code base since xfs_efi_cancel() was removed back in 2006 by commit 065d312e15902976d256ddaf396a7950ec0350a8 ("[XFS] Remove unused iop_abort log item operation), and even then xfs_efi_cancel() was never called. I haven't tracked it back further than that (beyond git history), but handling of efis in cancelled transactions has been broken for a long time. Basically, when we get an IOP_UNPIN(lip, 1); call from xfs_trans_uncommit() (i.e. remove == 1), if we don't free the log item descriptor we leak it. IOWs, the new behaviour introduced in this patch is actually the correct behaviour. > - what happened to XFS_EFI_RECOVERED? You changed it to be indexed > for the atomic bit-ops, but it's still used non-atomic in the log > recovery code. Ah, I forgot to convert it. > - Why is XFS_EFI_COMMITTED cleared in xlog_recover_do_efi_trans, > where it can't ever be set? It was just a straight transformation. I'll kill it. > - can you please add a shared helper for xfs_efi_item_unpin and > xfs_efi_release, ala: Ok. Will do. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+W+pQ+5+fromorbit.com=david@internode.on.net Wed Dec 1 19:30:34 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB21UXJj244091 for ; Wed, 1 Dec 2010 19:30:34 -0600 X-ASG-Debug-ID: 1291253535-1d0400b80000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A36B81BB270 for ; Wed, 1 Dec 2010 17:32:16 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id BySFDH6YoApFGSYT for ; Wed, 01 Dec 2010 17:32:16 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48849312-1927428 for multiple; Thu, 02 Dec 2010 12:02:15 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PNy1t-0006DK-Sc; Thu, 02 Dec 2010 12:32:13 +1100 Date: Thu, 2 Dec 2010 12:32:13 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 3/8] xfs: bulk AIL insertion during transaction commit Subject: Re: [PATCH 3/8] xfs: bulk AIL insertion during transaction commit Message-ID: <20101202013213.GM16922@dastard> References: <1290993152-20999-1-git-send-email-david@fromorbit.com> <1290993152-20999-4-git-send-email-david@fromorbit.com> <20101130224057.GA16143@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101130224057.GA16143@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1291253537 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48217 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Nov 30, 2010 at 05:40:57PM -0500, Christoph Hellwig wrote: > Generally looks good, a few minor comments below: > > > +void > > +xfs_trans_committed_bulk( > > + struct xfs_ail *ailp, > > + struct xfs_log_vec *log_vector, > > + xfs_lsn_t commit_lsn, > > + int aborted) > > +{ > > +#define LGIA_SIZE 32 > > + struct xfs_log_item *lgia[LGIA_SIZE]; > > The lgia name seems a bit to obscure to me. lgia == "log item array" > What about just log_items > as variable name, and LOG_ITEM_BATCH_SIZE or similar for the size? Ok, that's easy to do. > > + spin_lock(&ailp->xa_lock); > > + xfs_trans_ail_update_bulk(ailp, lgia, LGIA_SIZE, > > + commit_lsn); > > + for (i = 0; i < LGIA_SIZE; i++) > > + IOP_UNPIN(lgia[i], 0); > > > + spin_lock(&ailp->xa_lock); > > + xfs_trans_ail_update_bulk(ailp, lgia, i, commit_lsn); > > + for (j = 0; j < i; j++) > > + IOP_UNPIN(lgia[j], 0); > > It might be worth to factor these two little sniplets into a little > helper. I thought about it, but didn't because there was more code in writing a helper. I'll do it anyway... > > > + * Bulk update version of xfs_trans_ail_update. > > That won't be a very useful comment anymore once xfs_trans_ail_update is > implemented as a wrapper around this function.. Yup, but when the wrapper is introduced the comment is updated appropriately. > > > + struct xfs_log_item **lgia, > > Same naming comment here. Will fix. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+jcQm+5+fromorbit.com=david@internode.on.net Wed Dec 1 19:46:56 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB21ktbw244793 for ; Wed, 1 Dec 2010 19:46:55 -0600 X-ASG-Debug-ID: 1291254516-29f102d70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DEB951401FAE for ; Wed, 1 Dec 2010 17:48:37 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id cu1SBKhiqWMQJm7I for ; Wed, 01 Dec 2010 17:48:37 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 47875939-1927428 for multiple; Thu, 02 Dec 2010 12:18:36 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PNyHi-0006FJ-08; Thu, 02 Dec 2010 12:48:34 +1100 Date: Thu, 2 Dec 2010 12:48:33 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 02/14] xfs: clean up log space grant functions Subject: Re: [PATCH 02/14] xfs: clean up log space grant functions Message-ID: <20101202014833.GN16922@dastard> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-3-git-send-email-david@fromorbit.com> <20101201123032.GA20378@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101201123032.GA20378@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1291254518 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48218 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 07:30:32AM -0500, Christoph Hellwig wrote: > On Mon, Nov 29, 2010 at 12:38:20PM +1100, Dave Chinner wrote: > > From: Dave Chinner > > > > xlog_grant_log_space and xlog_regrant_log_write_space both have very > > similar structure. Both have a "wait on non-empty queue" section at > > the start, followed by a "wait for space" loop of which the contents > > are almost identical to the initial non-empty queue section. > > > > In both cases, the non-empty queue wait can be folded into the wait > > for space loop, simply by entering the loop if the queue is not > > empty and the current ticket is not on the queue. If we trigger the > > non-empty queue case, we always add ourselves to the queue, and > > hence the second and subsequent loops are always driven by the "wait > > for space" test. > > > > IOWs, both wait conditions can be folded into the one loop, removing > > a bunch of duplicated code and making it simpler to modify in > > future patches. > > I don't really like this patch. The new conditions are overly > complicated because of the desire to only go through the loop once > for the queue not empty case. In addition there's some behaviour > changes: > > - in xlog_grant_log_space we previously didn't call xlog_grant_push_ail > for the queue not empty case, and now we do. As you point out, there's no actual harm in doing that. > - in xlog_regrant_write_log_space the old version of the queue not > empty case would loop over all waiting tickets, and if we could > wake up all of them we'll skip the first wait, and given enough > free space also the second wait, while the new code always adds it > to the writeq, although it will still skip the actualy wait later. I didn't think there's any harm in that, either, because we're walking the entire queue anyway and it does not dirty any global shared cachelines we aren't already dirtying by taking the queue lock. > My recommendation would be to skip this patch for now and revisit the > area later. Ugh. That means the following 10 patches need to be reworked. > For example the superflous xlog_grant_push_ail actually > is rather harmless these days with the xfsaild threshold, so not > skipping it for the first case probably is fine in the end. Then again > the whole add to the queue just in case if it's non-empty doesn't make > much sense to me to start with. As soon as xfs_log_move_tail makes > space in the log it wakes up all tickets waiting for it anyway, so > adding us to the queue just in case seems rather inefficient, and not > overl helpful. Ok, so your main objection is the needless addition to the queue? That can be avoided easily enough via a local variable. Would that be sufficient to alleviate your concerns? Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+W+pQ+5+fromorbit.com=david@internode.on.net Wed Dec 1 19:47:48 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB21llGK244843 for ; Wed, 1 Dec 2010 19:47:48 -0600 X-ASG-Debug-ID: 1291254569-334500330000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id BA54F1BB301 for ; Wed, 1 Dec 2010 17:49:30 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id cfYJDBJR0PX5fX3A for ; Wed, 01 Dec 2010 17:49:30 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48851849-1927428 for multiple; Thu, 02 Dec 2010 12:19:29 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PNyIa-0006Fd-2s; Thu, 02 Dec 2010 12:49:28 +1100 Date: Thu, 2 Dec 2010 12:49:28 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 03/14] xfs: convert log grant heads to LSN notation Subject: Re: [PATCH 03/14] xfs: convert log grant heads to LSN notation Message-ID: <20101202014927.GO16922@dastard> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-4-git-send-email-david@fromorbit.com> <20101201124234.GB612@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101201124234.GB612@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1291254571 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48217 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 07:42:35AM -0500, Christoph Hellwig wrote: > The patch looks good to me, but I really hate overloading the lsn types > and helpers. Just add duplicated of CYCLE_LSN/BLOCK_LSN and > xlog_assign_lsn for a new type as use them. Ok, will fix. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+tXB3+5+fromorbit.com=david@internode.on.net Wed Dec 1 19:59:54 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB21xrSY245458 for ; Wed, 1 Dec 2010 19:59:53 -0600 X-ASG-Debug-ID: 1291255295-290302990000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 22EF41C85066 for ; Wed, 1 Dec 2010 18:01:35 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id qNmZFGzcJeGanLPS for ; Wed, 01 Dec 2010 18:01:35 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 3172791-1927428 for multiple; Thu, 02 Dec 2010 12:31:34 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PNyUG-0006GZ-QQ; Thu, 02 Dec 2010 13:01:32 +1100 Date: Thu, 2 Dec 2010 13:01:32 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 03/14] xfs: convert log grant heads to LSN notation Subject: Re: [PATCH 03/14] xfs: convert log grant heads to LSN notation Message-ID: <20101202020132.GP16922@dastard> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-4-git-send-email-david@fromorbit.com> <20101201130504.GA18379@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101201130504.GA18379@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1291255297 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48219 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 08:05:04AM -0500, Christoph Hellwig wrote: > > -STATIC int xlog_space_left(xlog_t *log, int cycle, int bytes); > > +STATIC int xlog_space_left(int logsize, xfs_lsn_t tail_lsn, > > + xfs_lsn_t head); > > Looking further through the series I have to say I really hate > passing in the logsize instead of the log structure. Passing the > log pointer from higher level functions just makes a lot more sense. > > Also in this case passing the tail_lsn explicitly doesn't make any sense > - it becomes atomic later and thus there is no locking requirement for > it. What I wanted to make clear is that the calculation works on fixed values and doesn't sample values internally itself. I guess that's not important for the log size, but for stuff like the tail lsn it avoids needing to sample inside xlog_space_left() before we crack it. i.e. something like this is wrong: cycle = CYCLE_LSN(atomic64_read(&log->l_tail_lsn)); block = BLOCK_LSN(atomic64_read(&log->l_tail_lsn)); and this is correct: tail_lsn = atomic64_read(&log->l_tail_lsn); cycle = CYCLE_LSN(tail_lsn); block = BLOCK_LSN(tail_lsn); So it makes sense to me to have the value of of the tail lsn and other variables that should only be sampled once passed into the function. That avoids misunderstandings further down the track because it is obvious that the calculation works on constant values. Perhaps I should add "const" to the parameter declarations to help make my intentions clear... > > > -xlog_grant_sub_space(struct log *log, int bytes) > > +__xlog_grant_sub_space( > > + xfs_lsn_t *head, > > + int bytes, > > + int logsize) > > Same thing here - the calling convention would be a lot more regular > by still passing the log as first argument. Ok, it's only for the logsize again, but that's not the important part of the calculation... > After the factoring I also think we could cut down on the amount of > wrappers in this area. Just rename __xlog_grant_sub_space and > __xlog_grant_add_space to not have the __ prefix, and kill the wrappers > around it - they only have one or two callers, and just having two > helpers and passing the heads we're interested in is a lot simpler and > cleaner. I thought about that - my first version even did this. I thought it was easier to understand the changes if I didn't change the calling conventions for modifying the grant heads. As such, I'd prefer to make this change to the wrappers in a separate patch. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+W+pQ+5+fromorbit.com=david@internode.on.net Wed Dec 1 20:00:42 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB220gOL245517 for ; Wed, 1 Dec 2010 20:00:42 -0600 X-ASG-Debug-ID: 1291255344-7a5503400000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2D67C1C851E5 for ; Wed, 1 Dec 2010 18:02:24 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id E5oDqiFFROQkHuEk for ; Wed, 01 Dec 2010 18:02:24 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48853526-1927428 for multiple; Thu, 02 Dec 2010 12:32:23 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PNyUu-0006Gh-Ff; Thu, 02 Dec 2010 13:02:12 +1100 Date: Thu, 2 Dec 2010 13:02:12 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 04/14] xfs: use wait queues directly for log grant queues Subject: Re: [PATCH 04/14] xfs: use wait queues directly for log grant queues Message-ID: <20101202020212.GQ16922@dastard> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-5-git-send-email-david@fromorbit.com> <20101201123454.GA612@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101201123454.GA612@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1291255346 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48219 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 07:34:54AM -0500, Christoph Hellwig wrote: > On Mon, Nov 29, 2010 at 12:38:22PM +1100, Dave Chinner wrote: > > From: Dave Chinner > > > > The log grant queues are one of the few places left using sv_t > > constructs for waiting. Convert them to use wait queues directly > > while we are cleaning up the code to move one step closer to remove > > the sv_t type from the XFS codebase. > > Doing this one separately from the other sv_t removal seems a bit > pointless. Ok, as you suggest later Iii'll just fold the other sv_t patches into this one. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+fUtr+5+fromorbit.com=david@internode.on.net Wed Dec 1 20:02:57 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB222utm245616 for ; Wed, 1 Dec 2010 20:02:57 -0600 X-ASG-Debug-ID: 1291255478-7a3503430000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B138E1C851FC for ; Wed, 1 Dec 2010 18:04:39 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id 25HjJPQGDmzktmBs for ; Wed, 01 Dec 2010 18:04:39 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48639325-1927428 for multiple; Thu, 02 Dec 2010 12:34:31 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PNyWn-0006H9-G9; Thu, 02 Dec 2010 13:04:09 +1100 Date: Thu, 2 Dec 2010 13:04:09 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 05/14] xfs: make AIL tail pushing independent of the grant lock Subject: Re: [PATCH 05/14] xfs: make AIL tail pushing independent of the grant lock Message-ID: <20101202020409.GR16922@dastard> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-6-git-send-email-david@fromorbit.com> <20101201124540.GC612@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101201124540.GC612@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1291255480 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48219 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 07:45:40AM -0500, Christoph Hellwig wrote: > Once l_tail_lsn and l_last_sync_lsn are converted to atomic64_ts later > in the series passing them in separately becomes pointless again. Maybe > scale the patch back a bit and require the caller to hold l_grant_lock > for now, until the atomic64_t conversion happens. Same reasoning as for the change to xlog_space_left - the values should only be sampled once for correctness, which is why I pass them into the function. more "const" annotations, I guess. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+Ztt8+5+fromorbit.com=david@internode.on.net Wed Dec 1 20:03:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2231l0245632 for ; Wed, 1 Dec 2010 20:03:01 -0600 X-ASG-Debug-ID: 1291255483-7a4403460000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7471A1C851FE for ; Wed, 1 Dec 2010 18:04:44 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id QE2qd7gdZnmAbtmS for ; Wed, 01 Dec 2010 18:04:44 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48487720-1927428 for multiple; Thu, 02 Dec 2010 12:34:43 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PNyXJ-0006HJ-Me; Thu, 02 Dec 2010 13:04:41 +1100 Date: Thu, 2 Dec 2010 13:04:41 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 08/14] xfs: convert log grant heads to atomic variables Subject: Re: [PATCH 08/14] xfs: convert log grant heads to atomic variables Message-ID: <20101202020441.GS16922@dastard> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-9-git-send-email-david@fromorbit.com> <20101201125920.GF612@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101201125920.GF612@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1291255485 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48219 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 07:59:20AM -0500, Christoph Hellwig wrote: > On Mon, Nov 29, 2010 at 12:38:26PM +1100, Dave Chinner wrote: > > From: Dave Chinner > > > > Convert the log grant heads to atomic64_t types in preparation for > > converting the accounting algorithms to atomic operations. his patch > > just converts the variables; the algorithmic changes are in a > > separate patch for clarity. > > > > Signed-off-by: Dave Chinner > > --- > > fs/xfs/linux-2.6/xfs_trace.h | 18 +++++++------ > > fs/xfs/xfs_log.c | 54 +++++++++++++++++++++-------------------- > > fs/xfs/xfs_log_priv.h | 4 +- > > fs/xfs/xfs_log_recover.c | 8 +++--- > > 4 files changed, 44 insertions(+), 40 deletions(-) > > > > diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h > > index d2cdc85..68c3bdd 100644 > > --- a/fs/xfs/linux-2.6/xfs_trace.h > > +++ b/fs/xfs/linux-2.6/xfs_trace.h > > @@ -768,8 +768,8 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, > > __field(unsigned int, flags) > > __field(void *, reserveq) > > __field(void *, writeq) > > - __field(xfs_lsn_t, grant_reserve_lsn) > > - __field(xfs_lsn_t, grant_write_lsn) > > + __field(xfs_lsn_t, grant_reserve_head) > > + __field(xfs_lsn_t, grant_write_head) > > What about just naming them _head from the beginning? That would > be a tad cleaner. Same for the actual variables in the log, even > if they change the type here. Will do. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+W+pQ+5+fromorbit.com=david@internode.on.net Wed Dec 1 20:08:52 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,SUBJ_TICKET autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB228pYl245854 for ; Wed, 1 Dec 2010 20:08:52 -0600 X-ASG-Debug-ID: 1291255833-254701ef0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 697681B9487 for ; Wed, 1 Dec 2010 18:10:34 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id Aye7sVXZM3MCP7qG for ; Wed, 01 Dec 2010 18:10:34 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48385437-1927428 for multiple; Thu, 02 Dec 2010 12:40:32 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PNycx-0006Ho-A9; Thu, 02 Dec 2010 13:10:31 +1100 Date: Thu, 2 Dec 2010 13:10:31 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 09/14] xfs: introduce new locks for the log grant ticket wait queues Subject: Re: [PATCH 09/14] xfs: introduce new locks for the log grant ticket wait queues Message-ID: <20101202021031.GT16922@dastard> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-10-git-send-email-david@fromorbit.com> <20101201131208.GA22455@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101201131208.GA22455@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1291255835 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48219 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 08:12:08AM -0500, Christoph Hellwig wrote: > > + /* co-ordinate with xfs_log_force_shutdown */ > > + if (XLOG_FORCED_SHUTDOWN(log)) { > > + spin_unlock(&log->l_grant_reserve_lock); > > + goto error_return; > > + } > > Where is this coming from? Otherwise the patch looks good to me. To handles the race condition between xfs_log_force_shutdown() clearing all the tickets off the queue and a racing log reserve that had already checked the shutdown flag and was spinning waiting for the reserve lock to add the ticket to the queue. The race condition is documented in xfs_log_force_shutdown()... Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+W+pQ+5+fromorbit.com=david@internode.on.net Wed Dec 1 20:09:50 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB229okA245896 for ; Wed, 1 Dec 2010 20:09:50 -0600 X-ASG-Debug-ID: 1291255892-7a3703750000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4566B1C8525D for ; Wed, 1 Dec 2010 18:11:33 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id PXiEW8XjQEDNhbnk for ; Wed, 01 Dec 2010 18:11:33 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48854960-1927428 for multiple; Thu, 02 Dec 2010 12:41:32 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PNydu-0006Hx-Mo; Thu, 02 Dec 2010 13:11:30 +1100 Date: Thu, 2 Dec 2010 13:11:30 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 10/14] xfs: convert grant head manipulations to lockless algorithm Subject: Re: [PATCH 10/14] xfs: convert grant head manipulations to lockless algorithm Message-ID: <20101202021130.GU16922@dastard> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-11-git-send-email-david@fromorbit.com> <20101201131513.GB22455@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101201131513.GB22455@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1291255894 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0021 1.0000 -2.0070 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.01 X-Barracuda-Spam-Status: No, SCORE=-2.01 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48219 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 08:15:13AM -0500, Christoph Hellwig wrote: > On Mon, Nov 29, 2010 at 12:38:28PM +1100, Dave Chinner wrote: > > From: Dave Chinner > > > > The only thing that the grant lock remains to protect is the grant head > > manipulations when adding or removing space from the log. These calculations > > are already based on atomic variables, so we can already update them safely > > without locks. However, the grant head manpulations require atomic multi-step > > calculations to be executed, which the algorithms currently don't allow. > > > > To make these multi-step calculations atomic, convert the algorithms to > > compare-and-exchange loops on the atomic variables. That is, we sample the old > > value, perform the calculation and use atomic64_cmpxchg() to attempt to update > > the head with the new value. If the head has not changed since we sampled it, > > it will succeed and we are done. Otherwise, we rerun the calculation again from > > a new sample of the head. > > > > This allows us to remove the grant lock from around all the grant head space > > manipulations, and that effectively removes the grant lock from the log > > completely. > > > > Signed-off-by: Dave Chinner .... > > @@ -3478,11 +3485,18 @@ xlog_verify_dest_ptr( > > xlog_panic("xlog_verify_dest_ptr: invalid ptr"); > > } > > > > +/* > > + * XXX: because we cannot atomically sample both the reserve and write heads, > > + * we cannot verify them reliably as they may be sampled in the middle of > > + * racing modifications. Hence just taking snapshots of the heads can give an > > + * incorrect view of the state of log. Hence just disable this check for now. > > + */ > > STATIC void > > xlog_verify_grant_head( > > I can't see any way to keep this check with the atomic reserve/write > heads, so we might as well remove it entirely. Ok, will do. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+tXB3+5+fromorbit.com=david@internode.on.net Wed Dec 1 20:14:36 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB22EapY246391 for ; Wed, 1 Dec 2010 20:14:36 -0600 X-ASG-Debug-ID: 1291256177-509401880000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id ABCC7160ADB3 for ; Wed, 1 Dec 2010 18:16:18 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id DssgHF5xm04GlEHr for ; Wed, 01 Dec 2010 18:16:18 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 3174778-1927428 for multiple; Thu, 02 Dec 2010 12:46:11 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PNyiP-0006IN-JK; Thu, 02 Dec 2010 13:16:09 +1100 Date: Thu, 2 Dec 2010 13:16:09 +1100 From: Dave Chinner To: Amit Sahrawat Cc: Eric Sandeen , xfs@oss.sgi.com, sandeen-xfs@sandeen.net X-ASG-Orig-Subj: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 Subject: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 Message-ID: <20101202021609.GV16922@dastard> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1291256179 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48220 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 12:44:58PM +0530, Amit Sahrawat wrote: > Dear Member, > > I am getting following corruption on XFS formatted disk during a simple copy > operation: > sd 9:0:0:0: Attached scsi removable disk sdc > sd 9:0:0:0: Attached scsi generic sg2 type 0 > XFS mounting filesystem sdc2 > Starting XFS recovery on filesystem: sdc2 (logdev: internal) > XFS: xlog_recover_process_data: bad transaction > XFS: log mount/recovery failed: error 5 > XFS: log mount failed > [root@localhost TEGRA]# "TEGRA" - You're running on an ARM device? If so, what kernel are you running? i.e. does it have the VIVT cache aliasing fixes in it? Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+W+pQ+5+fromorbit.com=david@internode.on.net Wed Dec 1 20:19:36 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB22Ja0P246609 for ; Wed, 1 Dec 2010 20:19:36 -0600 X-ASG-Debug-ID: 1291256478-1cf802aa0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0CD4A1BAC59 for ; Wed, 1 Dec 2010 18:21:18 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id rAc5VXRMhTeuidCo for ; Wed, 01 Dec 2010 18:21:18 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 37000957-1927428 for multiple; Thu, 02 Dec 2010 12:51:17 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PNynM-0006JD-81; Thu, 02 Dec 2010 13:21:16 +1100 Date: Thu, 2 Dec 2010 13:21:16 +1100 From: Dave Chinner To: Alex Elder Cc: dchinner@redhat.com, XFS Mailing List X-ASG-Orig-Subj: Re: xfstests 065 failures Subject: Re: xfstests 065 failures Message-ID: <20101202022116.GW16922@dastard> References: <1291235379.2556.28.camel@doink> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1291235379.2556.28.camel@doink> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1291256480 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0015 1.0000 -2.0115 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.01 X-Barracuda-Spam-Status: No, SCORE=-2.01 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48221 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 02:29:39PM -0600, Alex Elder wrote: > Dave, you were asking on IRC about test 065 failures. > I asked Bill Kendall about it and he bisected to find > that the commit below seems to be where the problems > started. I believe the problem is that one of the > times is not updated properly when renaming the file > "addedfile4". Here are the commands that might affect > that file in test 065: > > mv addeddir4/addedfile5 addeddir4/addedfile4 > mv addeddir4 addeddir6 > > I glanced at the commit and saw nothing obviously > wrong, but at the moment I can't really dig into > it any deeper so I thought I'd report what Bill > found so others could look. Yeah, I know that this patch was the cause, and IIRC it only affects a hard linked directory. What I found is that the iterative dump actually contains all the correct changes (the restore part of the test does not fail) - it's just that the dump image table of contents does not contain the all the changes. I haven't tracked down why the dump TOC does not contain a modification that is actually in the dump yet.... Cheers, Dave. -- Dave Chinner david@fromorbit.com From amit.sahrawat83@gmail.com Wed Dec 1 21:38:26 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.2 required=5.0 tests=BAYES_00,FREEMAIL_FROM, HTML_MESSAGE,J_CHICKENPOX_45,T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB23cPjH250034 for ; Wed, 1 Dec 2010 21:38:26 -0600 X-ASG-Debug-ID: 1291261209-57e202630000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qy0-f174.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 674DB1C8632C for ; Wed, 1 Dec 2010 19:40:09 -0800 (PST) Received: from mail-qy0-f174.google.com (mail-qy0-f174.google.com [209.85.216.174]) by cuda.sgi.com with ESMTP id H01HP3eCEGbY5XD7 for ; Wed, 01 Dec 2010 19:40:09 -0800 (PST) Received: by qyk11 with SMTP id 11so3581544qyk.5 for ; Wed, 01 Dec 2010 19:40:08 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=3eN9FK9Or81wtpTdaaWuXhb7tYTYejpWdMFL4SfU184=; b=Ot6PbvfXc/l1zqKbxX+LM5oL7Xgoi7r7KC8FlOG9t9juebnWWbRlUizVSdjiNDr63Y r9Asgaiw6ueQWbG7F7yBxwIXY5SpcXNw1wieA090u/iwUJ6gqzVGa9+pVNkTiYikaq47 15wpf8a5t1rOxdIEaIAQ+4jOvewox+bsYqRc8= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=sWeGKdIUHbL+7XcpfPssn87LoXu4l0Mr3n8sY5/8ekITIHKVKY/1hoG9Ghx/DnJgoE c0wQ/UeAYaWn7hq6jEqDKy9dNMovvOMeyoPB2bd1xUdpdasifJtCiqW2kc4TtUfufVKJ FsYOG5Dc837z35Pw8pVMAaCRbUDWthxV1A+/s= MIME-Version: 1.0 Received: by 10.229.227.12 with SMTP id iy12mr8128080qcb.101.1291261208805; Wed, 01 Dec 2010 19:40:08 -0800 (PST) Received: by 10.220.194.3 with HTTP; Wed, 1 Dec 2010 19:40:08 -0800 (PST) In-Reply-To: <4CF661C7.2020103@sandeen.net> References: <4CF661C7.2020103@sandeen.net> Date: Thu, 2 Dec 2010 09:10:08 +0530 Message-ID: X-ASG-Orig-Subj: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 Subject: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 From: Amit Sahrawat To: Eric Sandeen Cc: xfs@oss.sgi.com, sandeen-xfs@sandeen.net, david@fromorbit.com Content-Type: multipart/alternative; boundary=00163630f435a9c7700496652d68 X-Barracuda-Connect: mail-qy0-f174.google.com[209.85.216.174] X-Barracuda-Start-Time: 1291261209 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48224 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --00163630f435a9c7700496652d68 Content-Type: text/plain; charset=ISO-8859-1 While the copy operation is in progress, simply unplug the usb device and then replug. The issue can be seen from XFS (2.6.31) onwards, I am trying to figure out the changes between 2.6.30.9 and 2.6.31. One thing I noticed is - there is difference in speed for 2 versions - in case of 2.6.30.9 if I remove the USB within '5' seconds - I can see the file being created at the destination and some data written, while in case of 2.6.31(onwards), it takes around 20 seconds to get some data to disk. I am using MIPS at the moment with VIPT(fixes included) Please let me know if this information is useful. Thanks, Amit Sahrawat On Wed, Dec 1, 2010 at 8:25 PM, Eric Sandeen wrote: > On 12/1/10 1:14 AM, Amit Sahrawat wrote: > > Dear Member, > > > > I am getting following corruption on XFS formatted disk during a simple > copy operation: > > sd 9:0:0:0: Attached scsi removable disk sdc > > sd 9:0:0:0: Attached scsi generic sg2 type 0 > > XFS mounting filesystem sdc2 > > Starting XFS recovery on filesystem: sdc2 (logdev: internal) > > XFS: xlog_recover_process_data: bad transaction > > XFS: log mount/recovery failed: error 5 > > XFS: log mount failed > > hm, that's not a simple copy operation, that is a mount failing; > your log appears to be corrupted. > > offhand I'm going to blame it on having a write cache enabled > on your drive, and having barriers either off, or not working > properly. > > -Eric > > --00163630f435a9c7700496652d68 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
While the copy operation is in progress, simply unplug the usb device = and then replug.
The issue can be seen from XFS (2.6.31) onwards, I am trying to figure= out the changes between 2.6.30.9 and 2.6.31.
One thing I noticed is - there is difference in speed for 2 versions -= in case of 2.6.30.9 if I remove the USB within '5' seconds - I can= see the file being created at the destination and some data written, while= in case of 2.6.31(onwards), it takes=A0around 20 seconds to get some data = to disk.
I am using MIPS at the moment with VIPT(fixes included)

Please let me know if this information is useful.
=A0
Thanks,
Amit Sahrawat
On Wed, Dec 1, 2010 at 8:25 PM, Eric Sandeen <sandeen@sandeen.n= et> wrote:
On 12/1/10 1:14 AM, Amit Sahrawat wrote:
> Dear Mem= ber,
>
> I am getting following corruption on XFS formatted dis= k during a simple copy operation:
> sd 9:0:0:0: Attached scsi removab= le disk sdc
> sd 9:0:0:0: Attached scsi generic sg2 type 0
> XFS mounting file= system sdc2
> Starting XFS recovery on filesystem: sdc2 (logdev: inte= rnal)
> XFS: xlog_recover_process_data: bad transaction
> XFS: = log mount/recovery failed: error 5
> XFS: log mount failed

hm, that's not a simple copy op= eration, that is a mount failing;
your log appears to be corrupted.
<= br>offhand I'm going to blame it on having a write cache enabled
on your drive, and having barriers either off, or not working
properly.<= br>
-Eric


--00163630f435a9c7700496652d68-- From amit.sahrawat83@gmail.com Wed Dec 1 21:39:59 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.2 required=5.0 tests=BAYES_00,FREEMAIL_FROM, HTML_MESSAGE,J_CHICKENPOX_55,T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB23dw4Y250093 for ; Wed, 1 Dec 2010 21:39:59 -0600 X-ASG-Debug-ID: 1291261301-1db9011e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qy0-f174.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 809E5160AE7B for ; Wed, 1 Dec 2010 19:41:41 -0800 (PST) Received: from mail-qy0-f174.google.com (mail-qy0-f174.google.com [209.85.216.174]) by cuda.sgi.com with ESMTP id iNVnWkD3UcJXTpfw for ; Wed, 01 Dec 2010 19:41:41 -0800 (PST) Received: by qyk11 with SMTP id 11so3582780qyk.5 for ; Wed, 01 Dec 2010 19:41:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=/oV4NFdpueP4EM2eDGGI0WTQZ6ke8FMxCwNjm9LQ0pg=; b=SzzPS/z2+IYCvItgUr9nFxzk3k1OQzE90MfgYTyB/93p5JHdbQB4qjxtjIMwoLjnyg R6Xy8qi3lgL6LE5tx31MC6U4Qkkdd0KbZf5Xfsh1rk6mLgxV1T4vvJIAmqyuu+gEZHt8 zCwRmj1z1upDXaJgBsqIsxyazAlhIYMU3nsHM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=tlq4Hx0PWQIcRDDOdlICdojHgkLSoZTfrU+4juzRWOT56QSYgygoo7zD5q4YvGcdum tBG28TqlA5B1vHds9EHIG3kgS/Nkg5aBHvdseO0WPIbXHRc6p9dK2vbmplEc6SiH4o+C hh5Hl4aC96luFAvnwbXfPXWSBhbiOO1HrG8iM= MIME-Version: 1.0 Received: by 10.229.227.12 with SMTP id iy12mr8129210qcb.101.1291261301021; Wed, 01 Dec 2010 19:41:41 -0800 (PST) Received: by 10.220.194.3 with HTTP; Wed, 1 Dec 2010 19:41:40 -0800 (PST) In-Reply-To: <20101202021609.GV16922@dastard> References: <20101202021609.GV16922@dastard> Date: Thu, 2 Dec 2010 09:11:40 +0530 Message-ID: X-ASG-Orig-Subj: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 Subject: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 From: Amit Sahrawat To: Dave Chinner Cc: Eric Sandeen , xfs@oss.sgi.com, sandeen-xfs@sandeen.net Content-Type: multipart/alternative; boundary=00163630f43528de3504966533b4 X-Barracuda-Connect: mail-qy0-f174.google.com[209.85.216.174] X-Barracuda-Start-Time: 1291261302 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48226 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --00163630f43528de3504966533b4 Content-Type: text/plain; charset=ISO-8859-1 "TEGRA" by mistake happended to be the name of directory where I maintained logs :) I am using MIPS with VIPT cache(fixes included - regarding bad client id). Thanks, Amit Sahrawat On Thu, Dec 2, 2010 at 7:46 AM, Dave Chinner wrote: > On Wed, Dec 01, 2010 at 12:44:58PM +0530, Amit Sahrawat wrote: > > Dear Member, > > > > I am getting following corruption on XFS formatted disk during a simple > copy > > operation: > > sd 9:0:0:0: Attached scsi removable disk sdc > > sd 9:0:0:0: Attached scsi generic sg2 type 0 > > XFS mounting filesystem sdc2 > > Starting XFS recovery on filesystem: sdc2 (logdev: internal) > > XFS: xlog_recover_process_data: bad transaction > > XFS: log mount/recovery failed: error 5 > > XFS: log mount failed > > [root@localhost TEGRA]# > > "TEGRA" - You're running on an ARM device? If so, what kernel are > you running? i.e. does it have the VIVT cache aliasing fixes in it? > > Cheers, > > Dave. > -- > Dave Chinner > david@fromorbit.com > --00163630f43528de3504966533b4 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
"TEGRA" by mistake happended to be the name of directory whe= re I maintained logs :)
I am using MIPS with VIPT cache(fixes included - regarding bad client = id).
=A0
=A0
Thanks,
Amit Sahrawat

On Thu, Dec 2, 2010 at 7:46 AM, Dave Chinner <david@fromorbit.c= om> wrote:
On Wed, Dec 01, 2010 at 12:44:58PM +0530, Amit Sahrawat w= rote:
> Dear Member,
>
> I am getting following corruptio= n on XFS formatted disk during a simple copy
> operation:
> sd = 9:0:0:0: Attached scsi removable disk sdc
> sd 9:0:0:0: Attached scsi generic sg2 type 0
> XFS mounting file= system sdc2
> Starting XFS recovery on filesystem: sdc2 (logdev: inte= rnal)
> XFS: xlog_recover_process_data: bad transaction
> XFS: = log mount/recovery failed: error 5
> XFS: log mount failed
> [root@localhost TEGRA]#

&qu= ot;TEGRA" - You're running on an ARM device? If so, what kernel ar= e
you running? i.e. does it have the VIVT cache aliasing fixes in it?
Cheers,

Dave.
--
Dave Chinner
<= a href=3D"mailto:david@fromorbit.com">david@fromorbit.com

--00163630f43528de3504966533b4-- From sandeen@sandeen.net Wed Dec 1 21:55:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_45 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB23tEPA250836 for ; Wed, 1 Dec 2010 21:55:15 -0600 X-ASG-Debug-ID: 1291262217-7d0e00ce0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 6B1B81C81737 for ; Wed, 1 Dec 2010 19:56:57 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id edUj8bnxJUBrOgp2 for ; Wed, 01 Dec 2010 19:56:57 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id 204F648E8B05; Wed, 1 Dec 2010 21:56:57 -0600 (CST) Message-ID: <4CF71907.60803@sandeen.net> Date: Wed, 01 Dec 2010 21:56:55 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: Amit Sahrawat CC: xfs@oss.sgi.com, sandeen-xfs@sandeen.net, david@fromorbit.com X-ASG-Orig-Subj: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 Subject: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 References: <4CF661C7.2020103@sandeen.net> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1291262218 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48227 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/1/10 9:40 PM, Amit Sahrawat wrote: > While the copy operation is in progress, simply unplug the usb device and then replug. that's not a simple copy operation either ;) > The issue can be seen from XFS (2.6.31) onwards, I am trying to figure out the changes between 2.6.30.9 and 2.6.31. If you have a regression, perhaps you can do: # git bisect start v2.6.31 v2.6.30 fs/xfs and methodically test the changes in between. -Eric > One thing I noticed is - there is difference in speed for 2 versions - in case of 2.6.30.9 if I remove the USB within '5' seconds - I can see the file being created at the destination and some data written, while in case of 2.6.31(onwards), it takes around 20 seconds to get some data to disk. > I am using MIPS at the moment with VIPT(fixes included) > > Please let me know if this information is useful. > > Thanks, > Amit Sahrawat > On Wed, Dec 1, 2010 at 8:25 PM, Eric Sandeen > wrote: > > On 12/1/10 1:14 AM, Amit Sahrawat wrote: > > Dear Member, > > > > I am getting following corruption on XFS formatted disk during a simple copy operation: > > sd 9:0:0:0: Attached scsi removable disk sdc > > sd 9:0:0:0: Attached scsi generic sg2 type 0 > > XFS mounting filesystem sdc2 > > Starting XFS recovery on filesystem: sdc2 (logdev: internal) > > XFS: xlog_recover_process_data: bad transaction > > XFS: log mount/recovery failed: error 5 > > XFS: log mount failed > > hm, that's not a simple copy operation, that is a mount failing; > your log appears to be corrupted. > > offhand I'm going to blame it on having a write cache enabled > on your drive, and having barriers either off, or not working > properly. > > -Eric > > From amit.sahrawat83@gmail.com Wed Dec 1 22:07:36 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.2 required=5.0 tests=BAYES_00,FREEMAIL_FROM, HTML_MESSAGE,J_CHICKENPOX_45,T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB247aI5251339 for ; Wed, 1 Dec 2010 22:07:36 -0600 X-ASG-Debug-ID: 1291262959-082d00e60000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qy0-f181.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id BE4C21B9F2F for ; Wed, 1 Dec 2010 20:09:19 -0800 (PST) Received: from mail-qy0-f181.google.com (mail-qy0-f181.google.com [209.85.216.181]) by cuda.sgi.com with ESMTP id mntLUYW32B51YOtZ for ; Wed, 01 Dec 2010 20:09:19 -0800 (PST) Received: by qyk12 with SMTP id 12so8736908qyk.5 for ; Wed, 01 Dec 2010 20:09:19 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=uCP83ARkYvV1ZZoqbtmShdh0PxECl9B3lbsLA8mjFrQ=; b=KPoL3NoOOTRtzI6VwG1rSUKufOGEBQag3jBhwNhXAsOmCt8KgUJyqaMpjM3RCmLwWz UZRXiHqDMQNBkUYTtkcoc5/w4BXPVFV7ety7GXy07h80v0sdb7Z4QEgBm51BDz+8W1K3 nNLjNAKGFiMYloDEcnM+CZISmYIiyLaKrp0PY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=FXIrZ9cXftbKYwGawTwNUC6CKZIbKzSBEaaZY2QivcTrTWgFrwqOSRnFkYyGP1n0Ba ttFIiPmTxX5VhI8cZG2LbKHh04eLAq/8OvI4Dj21kxC+2ZMzzB1Fn8FqiYnqhzXQ8Hes VcSYd+A5vAVrxL0x2xZw9jcxD6zHklzV+udW4= MIME-Version: 1.0 Received: by 10.224.54.72 with SMTP id p8mr8712402qag.126.1291262958762; Wed, 01 Dec 2010 20:09:18 -0800 (PST) Received: by 10.220.194.3 with HTTP; Wed, 1 Dec 2010 20:09:18 -0800 (PST) In-Reply-To: <4CF71907.60803@sandeen.net> References: <4CF661C7.2020103@sandeen.net> <4CF71907.60803@sandeen.net> Date: Thu, 2 Dec 2010 09:39:18 +0530 Message-ID: X-ASG-Orig-Subj: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 Subject: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 From: Amit Sahrawat To: Eric Sandeen Cc: xfs@oss.sgi.com, sandeen-xfs@sandeen.net, david@fromorbit.com Content-Type: multipart/alternative; boundary=0015175caa80f7fa6804966595a2 X-Barracuda-Connect: mail-qy0-f181.google.com[209.85.216.181] X-Barracuda-Start-Time: 1291262959 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48227 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --0015175caa80f7fa6804966595a2 Content-Type: text/plain; charset=ISO-8859-1 yes, thats the only approach at the moment which can help. I am doubting the changes related with the disk commit, but I am not sure. Thanks, Amit Sahrawat On Thu, Dec 2, 2010 at 9:26 AM, Eric Sandeen wrote: > On 12/1/10 9:40 PM, Amit Sahrawat wrote: > > While the copy operation is in progress, simply unplug the usb device and > then replug. > > that's not a simple copy operation either ;) > > > The issue can be seen from XFS (2.6.31) onwards, I am trying to figure > out the changes between 2.6.30.9 and 2.6.31. > > If you have a regression, perhaps you can do: > > # git bisect start v2.6.31 v2.6.30 fs/xfs > > and methodically test the changes in between. > > -Eric > > > One thing I noticed is - there is difference in speed for 2 versions - in > case of 2.6.30.9 if I remove the USB within '5' seconds - I can see the file > being created at the destination and some data written, while in case of > 2.6.31(onwards), it takes around 20 seconds to get some data to disk. > > I am using MIPS at the moment with VIPT(fixes included) > > > > Please let me know if this information is useful. > > > > Thanks, > > Amit Sahrawat > > On Wed, Dec 1, 2010 at 8:25 PM, Eric Sandeen sandeen@sandeen.net>> wrote: > > > > On 12/1/10 1:14 AM, Amit Sahrawat wrote: > > > Dear Member, > > > > > > I am getting following corruption on XFS formatted disk during a > simple copy operation: > > > sd 9:0:0:0: Attached scsi removable disk sdc > > > sd 9:0:0:0: Attached scsi generic sg2 type 0 > > > XFS mounting filesystem sdc2 > > > Starting XFS recovery on filesystem: sdc2 (logdev: internal) > > > XFS: xlog_recover_process_data: bad transaction > > > XFS: log mount/recovery failed: error 5 > > > XFS: log mount failed > > > > hm, that's not a simple copy operation, that is a mount failing; > > your log appears to be corrupted. > > > > offhand I'm going to blame it on having a write cache enabled > > on your drive, and having barriers either off, or not working > > properly. > > > > -Eric > > > > > > --0015175caa80f7fa6804966595a2 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
yes, thats the only approach at the moment which can help. I am doubti= ng the changes related with the disk commit, but I=A0am not sure.
=A0
Thanks,
Amit Sahrawat

On Thu, Dec 2, 2010 at 9:26 AM, Eric Sandeen <sandeen@sandeen.n= et> wrote:
On 12/1/10 9:40 PM, Amit Sahrawat wrote:
> While th= e copy operation is in progress, simply unplug the usb device and then repl= ug.

that's not a simple copy operation either ;)

> The issue can be seen from XFS (2.6.31) onwards,= I am trying to figure out the changes between 2.6.30.9 and 2.6.31.

=
If you have a regression, perhaps you can do:

# git bisect sta= rt v2.6.31 v2.6.30 fs/xfs

and methodically test the changes in between.

-Eric

> One thing I noticed is - there is difference in = speed for 2 versions - in case of 2.6.30.9 if I remove the USB within '= 5' seconds - I can see the file being created at the destination and so= me data written, while in case of 2.6.31(onwards), it takes around 20 secon= ds to get some data to disk.
> I am using MIPS at the moment with VIPT(fixes included)
>
>= ; Please let me know if this information is useful.
>
> Thanks,=
> Amit Sahrawat
> On Wed, Dec 1, 2010 at 8:25 PM, Eric Sandeen <sandeen@sandeen.net <mailto:sandeen@sandeen.net>> wrote: >
> =A0 =A0 On 12/1/10 1:14 AM, Amit Sahrawat wrote:
> =A0 = =A0 > Dear Member,
> =A0 =A0 >
> =A0 =A0 > I am gettin= g following corruption on XFS formatted disk during a simple copy operation= :
> =A0 =A0 > sd 9:0:0:0: Attached scsi removable disk sdc
> =A0 =A0 > sd 9:0:0:0: Attached scsi generic sg2 type 0
> =A0 = =A0 > XFS mounting filesystem sdc2
> =A0 =A0 > Starting XFS rec= overy on filesystem: sdc2 (logdev: internal)
> =A0 =A0 > XFS: xlog= _recover_process_data: bad transaction
> =A0 =A0 > XFS: log mount/recovery failed: error 5
> =A0 =A0 &= gt; XFS: log mount failed
>
> =A0 =A0 hm, that's not a simp= le copy operation, that is a mount failing;
> =A0 =A0 your log appear= s to be corrupted.
>
> =A0 =A0 offhand I'm going to blame it on having a write ca= che enabled
> =A0 =A0 on your drive, and having barriers either off, = or not working
> =A0 =A0 properly.
>
> =A0 =A0 -Eric
&= gt;
>


--0015175caa80f7fa6804966595a2-- From SRS0+W+pQ+5+fromorbit.com=david@internode.on.net Wed Dec 1 22:11:50 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB24Bn5c251500 for ; Wed, 1 Dec 2010 22:11:50 -0600 X-ASG-Debug-ID: 1291263211-1da102870000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3867C160B415 for ; Wed, 1 Dec 2010 20:13:31 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id wCGnQxD6bHUsRVZq for ; Wed, 01 Dec 2010 20:13:31 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48229173-1927428 for multiple; Thu, 02 Dec 2010 14:43:24 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PO0Xg-0006Qu-5j; Thu, 02 Dec 2010 15:13:12 +1100 Date: Thu, 2 Dec 2010 15:13:12 +1100 From: Dave Chinner To: Amit Sahrawat Cc: Eric Sandeen , xfs@oss.sgi.com, sandeen-xfs@sandeen.net X-ASG-Orig-Subj: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 Subject: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 Message-ID: <20101202041312.GX16922@dastard> References: <4CF661C7.2020103@sandeen.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail18.adl2.internode.on.net[150.101.137.103] X-Barracuda-Start-Time: 1291263213 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48228 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02, 2010 at 09:10:08AM +0530, Amit Sahrawat wrote: > While the copy operation is in progress, simply unplug the usb device and > then replug. That's pretty much a guaranteed recipe for data and filesystem corruption regardless of the filesystem you are using. Even if you are lucky enough that there was is no IO being issued while the device is unplugged, what guarantee is there that the device even comes back with the same device name? Further, if the device is usb powered, there is no guarantee that the drive caches were flushed correctly before the unplug so random log and metadata corruptions are definitely possible. Cheers, Dave. -- Dave Chinner david@fromorbit.com From amit.sahrawat83@gmail.com Wed Dec 1 22:37:07 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,FREEMAIL_FROM, HTML_MESSAGE,T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB24b6Ds254156 for ; Wed, 1 Dec 2010 22:37:07 -0600 X-ASG-Debug-ID: 1291264730-738d035d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qy0-f181.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9BF711B726B for ; Wed, 1 Dec 2010 20:38:50 -0800 (PST) Received: from mail-qy0-f181.google.com (mail-qy0-f181.google.com [209.85.216.181]) by cuda.sgi.com with ESMTP id ZRaJN3asFSpqn6Ac for ; Wed, 01 Dec 2010 20:38:50 -0800 (PST) Received: by qyk12 with SMTP id 12so8761266qyk.5 for ; Wed, 01 Dec 2010 20:38:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=7giLKChMisuw7WvE9okr4pVIv3jUNUrYns1QzEBQGUI=; b=p7JWWetSO9JHzm0ughghPpre3ZLJONc0ecPtSJmNCY8Xcgs7YovVfShowSf94N+bFA vrlX0wVNK41B7nTGCf4itbBPB13C077BEqVp7T+QY1SG1kaXv6944QSkA/wkM5OYB477 1GU1A9VFzvoRwMF47CGoM/bnMDAimHohMYAHo= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=dMjeilD2oq5U1Bui0QDvUPaW6QEBoFh1PvXb7QtrQtstI8TwKn6HKnTBRqqvODfhJr 6A28sAmAMA8iFNcQ7ifgtKmABROpnjbHf0/ZLeJTrj/PD+zWe7GUlNZ8Y+5gbeCCX6wM 6wwpZpL31XgmDX63qtCG1GMpawMefR3kyIAWY= MIME-Version: 1.0 Received: by 10.224.54.72 with SMTP id p8mr8736042qag.126.1291264729848; Wed, 01 Dec 2010 20:38:49 -0800 (PST) Received: by 10.220.194.3 with HTTP; Wed, 1 Dec 2010 20:38:49 -0800 (PST) In-Reply-To: <20101202041312.GX16922@dastard> References: <4CF661C7.2020103@sandeen.net> <20101202041312.GX16922@dastard> Date: Thu, 2 Dec 2010 10:08:49 +0530 Message-ID: X-ASG-Orig-Subj: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 Subject: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 From: Amit Sahrawat To: Dave Chinner Cc: Eric Sandeen , xfs@oss.sgi.com, sandeen-xfs@sandeen.net Content-Type: multipart/alternative; boundary=0015175caa80889cee049665ffdf X-Barracuda-Connect: mail-qy0-f181.google.com[209.85.216.181] X-Barracuda-Start-Time: 1291264730 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48228 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --0015175caa80889cee049665ffdf Content-Type: text/plain; charset=ISO-8859-1 I am not able to reproduce the same behaviour on 2.6.30.9, had it been on all versions - this can safely be termed as behaviour. But from 2.6.31 onwards this is very much reproducable, especially the change in behaviour of writing to disk. I will try more things and update if I can find anything new in this. Thanks, Amit Sahrawat On Thu, Dec 2, 2010 at 9:43 AM, Dave Chinner wrote: > On Thu, Dec 02, 2010 at 09:10:08AM +0530, Amit Sahrawat wrote: > > While the copy operation is in progress, simply unplug the usb device and > > then replug. > > That's pretty much a guaranteed recipe for data and filesystem > corruption regardless of the filesystem you are using. Even if you > are lucky enough that there was is no IO being issued while the > device is unplugged, what guarantee is there that the device even > comes back with the same device name? Further, if the device is usb > powered, there is no guarantee that the drive caches were > flushed correctly before the unplug so random log and metadata > corruptions are definitely possible. > > Cheers, > > Dave. > -- > Dave Chinner > david@fromorbit.com > --0015175caa80889cee049665ffdf Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
I am not able to reproduce the same behaviour on 2.6.30.9, had it been= on all versions - this can safely be termed as behaviour. But from 2.6.31 = onwards this is very much reproducable, especially the change in behaviour = of writing to disk.
I will try more things and update if I can find anything new in this.<= /div>
=A0
Thanks,
Amit Sahrawat

On Thu, Dec 2, 2010 at 9:43 AM, Dave Chinner <david@fromorbit.c= om> wrote:
On Thu, Dec 02, 2010 at 09:10:08AM +0530, Amit Sahrawat w= rote:
> While the copy operation is in progress, simply unplug the us= b device and
> then replug.

That's pretty much a gua= ranteed recipe for data and filesystem
corruption regardless of the filesystem you are using. Even if you
are l= ucky enough that there was is no IO being issued while the
device is unp= lugged, what guarantee is there that the device even
comes back with the= same device name? Further, if the device is usb
powered, there is no guarantee that the drive caches were
flushed correc= tly before the unplug so random log and metadata
corruptions are definit= ely possible.

Cheers,

Dave.
--
Dave Chinner
david@fromorbit.com

--0015175caa80889cee049665ffdf-- From ajeet.yadav.77@gmail.com Thu Dec 2 00:59:48 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: *** X-Spam-Status: No, score=3.0 required=5.0 tests=BAYES_40,FREEMAIL_FROM, HTML_MESSAGE,T_DKIM_INVALID,T_TO_NO_BRKTS_FREEMAIL autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB26xlgh000783 for ; Thu, 2 Dec 2010 00:59:48 -0600 X-ASG-Debug-ID: 1291273290-156901a20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qw0-f53.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 832D2160B6BB for ; Wed, 1 Dec 2010 23:01:31 -0800 (PST) Received: from mail-qw0-f53.google.com (mail-qw0-f53.google.com [209.85.216.53]) by cuda.sgi.com with ESMTP id SygcYnwMAJup1BaK for ; Wed, 01 Dec 2010 23:01:31 -0800 (PST) Received: by qwe5 with SMTP id 5so7837165qwe.26 for ; Wed, 01 Dec 2010 23:01:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=xwQuflRrJ83yrtvkZMQVVGu7y3vSBgnWUA9//kXxhBY=; b=DZttjlz/0iZdBUa95YbKPEHNzNcIwOSVFZn8ddaj76m8q+kWhAtF/Ja66YncQ+n0gD qVhwS8WAljpaW3F9v2wZiNmyMCGFpqNgO79vWJQnNPfyCea6sR4y7xewm8bdrkCCle6O qucAXynWeB+b1hIYOqFptM5yomr6c1E8AYwjc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=MiOH9Y6OjeilQuI0pLocQ/6T8TJUYElN2bWwlyw7CW7FyPpcKZ2pXIlTTqts1d2ul3 NbRfjHmhttqdQGJG8/aifO7rsBDPSVb9F094arI8Ugvmk7cVD9KFEUPTa+YhjwvguqR1 jo8IGhuw23jPHMg2W4w0FGX1timQozib0y1Bg= MIME-Version: 1.0 Received: by 10.224.61.6 with SMTP id r6mr8921746qah.104.1291273290692; Wed, 01 Dec 2010 23:01:30 -0800 (PST) Received: by 10.220.162.69 with HTTP; Wed, 1 Dec 2010 23:01:30 -0800 (PST) Date: Thu, 2 Dec 2010 12:31:30 +0530 Message-ID: X-ASG-Orig-Subj: XFS mount fail: XFS_WANT_CORRUPTED_GOTO fs/xfs/xfs_alloc.c Subject: XFS mount fail: XFS_WANT_CORRUPTED_GOTO fs/xfs/xfs_alloc.c From: Ajeet Yadav To: xfs@oss.sgi.com Content-Type: multipart/alternative; boundary=0015175cded4ccbab7049667fd60 X-Barracuda-Connect: mail-qw0-f53.google.com[209.85.216.53] X-Barracuda-Start-Time: 1291273291 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48238 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --0015175cded4ccbab7049667fd60 Content-Type: text/plain; charset=ISO-8859-1 Dear all, This is XFS fail mount log on linux 2.6.30.9 XFS mounting filesystem sda2 Starting XFS recovery on filesystem: sda2 (logdev: internal) XFS internal error XFS_WANT_CORRUPTED_GOTO at line 1629 of file fs/xfs/xfs_alloc.c. Caller 0x80129658 Call Trace: [<802dedc8>] dump_stack+0x8/0x34 from[<80127400>] xfs_free_ag_extent+0x128/0x7ac [<80127400>] xfs_free_ag_extent+0x128/0x7ac from[<80129658>] xfs_free_extent+0xb8/0xe8 [<80129658>] xfs_free_extent+0xb8/0xe8 from[<80163978>] xlog_recover_process_efi+0x160/0x214 [<80163978>] xlog_recover_process_efi+0x160/0x214 from[<80163ac4>] xlog_recover_process_efis+0x98/0x11c [<80163ac4>] xlog_recover_process_efis+0x98/0x11c from[<8016663c>] xlog_recover_finish+0x28/0xdc [<8016663c>] xlog_recover_finish+0x28/0xdc from[<8016aec0>] xfs_mountfs+0x4d0/0x610 [<8016aec0>] xfs_mountfs+0x4d0/0x610 from[<80184434>] xfs_fs_fill_super+0x1fc/0x418 [<80184434>] xfs_fs_fill_super+0x1fc/0x418 from[<800bae48>] get_sb_bdev+0x11c/0x1c0 [<800bae48>] get_sb_bdev+0x11c/0x1c0 from[<80181f20>] xfs_fs_get_sb+0x20/0x2c [<80181f20>] xfs_fs_get_sb+0x20/0x2c from[<800b9424>] vfs_kern_mount+0x68/0xd0 [<800b9424>] vfs_kern_mount+0x68/0xd0 from[<800b94f0>] do_kern_mount+0x54/0x118 [<800b94f0>] do_kern_mount+0x54/0x118 from[<800d44e8>] do_mount+0x7b4/0x828 [<800d44e8>] do_mount+0x7b4/0x828 from[<800d45f8>] sys_mount+0x9c/0x194 [<800d45f8>] sys_mount+0x9c/0x194 from[<800102c4>] stack_done+0x20/0x3c Failed to recover EFIs on filesystem: sda2 XFS: log mount finish failed --0015175cded4ccbab7049667fd60 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Dear all,
This is XFS fail mount log on linux 2.6.30.9
=A0
XFS mounting filesystem sda2
Starting XFS recovery on filesystem: s= da2 (logdev: internal)
XFS internal error XFS_WANT_CORRUPTED_GOTO at lin= e 1629 of file fs/xfs/xfs_alloc.c.=A0 Caller 0x80129658
Call Trace:
[<802dedc8>] dump_stack+0x8/0x34 from[<80127400>] xfs_free_ag_e= xtent+0x128/0x7ac
[<80127400>] xfs_free_ag_extent+0x128/0x7ac from= [<80129658>] xfs_free_extent+0xb8/0xe8
[<80129658>] xfs_free= _extent+0xb8/0xe8 from[<80163978>] xlog_recover_process_efi+0x160/0x2= 14
[<80163978>] xlog_recover_process_efi+0x160/0x214 from[<80163ac4&g= t;] xlog_recover_process_efis+0x98/0x11c
[<80163ac4>] xlog_recover= _process_efis+0x98/0x11c from[<8016663c>] xlog_recover_finish+0x28/0x= dc
[<8016663c>] xlog_recover_finish+0x28/0xdc from[<8016aec0>] xfs= _mountfs+0x4d0/0x610
[<8016aec0>] xfs_mountfs+0x4d0/0x610 from[<= ;80184434>] xfs_fs_fill_super+0x1fc/0x418
[<80184434>] xfs_fs_f= ill_super+0x1fc/0x418 from[<800bae48>] get_sb_bdev+0x11c/0x1c0
[<800bae48>] get_sb_bdev+0x11c/0x1c0 from[<80181f20>] xfs_fs_ge= t_sb+0x20/0x2c
[<80181f20>] xfs_fs_get_sb+0x20/0x2c from[<800b9= 424>] vfs_kern_mount+0x68/0xd0
[<800b9424>] vfs_kern_mount+0x68= /0xd0 from[<800b94f0>] do_kern_mount+0x54/0x118
[<800b94f0>] do_kern_mount+0x54/0x118 from[<800d44e8>] do_mount= +0x7b4/0x828
[<800d44e8>] do_mount+0x7b4/0x828 from[<800d45f8&g= t;] sys_mount+0x9c/0x194
[<800d45f8>] sys_mount+0x9c/0x194 from[&l= t;800102c4>] stack_done+0x20/0x3c
=A0
Failed to recover EFIs on filesystem: sda2
XFS: log mount finish = failed
--0015175cded4ccbab7049667fd60-- From michael.monnerie@is.it-management.at Thu Dec 2 05:31:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2BVTh4014138 for ; Thu, 2 Dec 2010 05:31:30 -0600 X-ASG-Debug-ID: 1291289590-73b3018f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mailsrv14.zmi.at (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CA99E1C883BB for ; Thu, 2 Dec 2010 03:33:11 -0800 (PST) Received: from mailsrv14.zmi.at (mailsrv1.zmi.at [212.69.164.54]) by cuda.sgi.com with ESMTP id eHYkEGr4gWzzTT4h for ; Thu, 02 Dec 2010 03:33:11 -0800 (PST) Received: from mailsrv.i.zmi.at (h081217106033.dyn.cm.kabsi.at [81.217.106.33]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client CN "mailsrv2.i.zmi.at", Issuer "power4u.zmi.at" (not verified)) by mailsrv14.zmi.at (Postfix) with ESMTPSA id 2609F609; Thu, 2 Dec 2010 12:33:09 +0100 (CET) Received: from saturn.localnet (saturn.i.zmi.at [10.72.27.2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mailsrv.i.zmi.at (Postfix) with ESMTPSA id 86303401C3D; Thu, 2 Dec 2010 12:33:07 +0100 (CET) From: Michael Monnerie Organization: it-management http://it-management.at To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs_repair of critical volume Subject: Re: xfs_repair of critical volume Date: Thu, 2 Dec 2010 12:33:02 +0100 User-Agent: KMail/1.13.5 (Linux/2.6.34.7-0.5-desktop; KDE/4.4.4; x86_64; ; ) Cc: Eli Morris , Dave Chinner References: <75C248E3-2C99-426E-AE7D-9EC543726796@ucsc.edu> <20101117074708.GP22876@dastard> In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2592691.X4ZIO1cIyr"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <201012021233.07213@zmi.at> X-Barracuda-Connect: mailsrv1.zmi.at[212.69.164.54] X-Barracuda-Start-Time: 1291289591 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48257 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --nextPart2592691.X4ZIO1cIyr Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable On Dienstag, 30. November 2010 Eli Morris wrote: > Thanks for your help with this. I wrote the program and ran it > through and it looks like we have we able to preserve 44 TB of valid > data, while removing the corrupted files, which is a great result, > considering the circumstances.=20 Eli, could you post the relevant program here so others can use it if=20 needed? There are requests from time to time, and it would be good if=20 such a program were available (like I'm sure you'd been happy if it=20 already existed the time you needed it). Thanks, and wow: what an amazing filesystem can recover such an event! =2D-=20 mit freundlichen Gr=FCssen, Michael Monnerie, Ing. BSc it-management Internet Services: Prot=E9ger http://proteger.at [gesprochen: Prot-e-schee] Tel: +43 660 / 415 6531 // ****** Radiointerview zum Thema Spam ****** // http://www.it-podcast.at/archiv.html#podcast-100716 //=20 // Haus zu verkaufen: http://zmi.at/langegg/ --nextPart2592691.X4ZIO1cIyr Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.15 (GNU/Linux) iEYEABECAAYFAkz3g/MACgkQzhSR9xwSCbSqfACg3RkCYB+j5dLKRL3PTvGvmA7H Rw8An24uOFEeD0Kgzxb6Wug0hvbNuJXi =wvwl -----END PGP SIGNATURE----- --nextPart2592691.X4ZIO1cIyr-- From BATV+5c8b8fc841e426a1fab9+2657+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 2 05:37:11 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2Bb8WJ014392 for ; Thu, 2 Dec 2010 05:37:10 -0600 X-ASG-Debug-ID: 1291289931-0a0400850000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A0FBE1404F6A for ; Thu, 2 Dec 2010 03:38:52 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id qm1feOlqniwCKSQC for ; Thu, 02 Dec 2010 03:38:52 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PO7Uv-0005ai-Bx; Thu, 02 Dec 2010 11:38:49 +0000 Date: Thu, 2 Dec 2010 06:38:49 -0500 From: Christoph Hellwig To: Dave Chinner Cc: Christoph Hellwig , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 1/8] xfs: Pull EFI/EFD handling out from under the AIL lock Subject: Re: [PATCH 1/8] xfs: Pull EFI/EFD handling out from under the AIL lock Message-ID: <20101202113849.GA21365@infradead.org> References: <1290993152-20999-1-git-send-email-david@fromorbit.com> <1290993152-20999-2-git-send-email-david@fromorbit.com> <20101130201734.GA16079@infradead.org> <20101202012841.GL16922@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101202012841.GL16922@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291289932 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02, 2010 at 12:28:41PM +1100, Dave Chinner wrote: > > - there is a behaviour change about the xfs_trans_del_item call > > in xfs_efi_item_unpin - before it was protected by the > > XFS_EFI_CANCELED which was never set, and now it's not. > > XFS_EFI_CANCELED has not been set in the code base since > xfs_efi_cancel() was removed back in 2006 by commit > 065d312e15902976d256ddaf396a7950ec0350a8 ("[XFS] Remove unused > iop_abort log item operation), and even then xfs_efi_cancel() was > never called. I haven't tracked it back further than that (beyond > git history), but handling of efis in cancelled transactions has > been broken for a long time. > > Basically, when we get an IOP_UNPIN(lip, 1); call from > xfs_trans_uncommit() (i.e. remove == 1), if we don't free the log > item descriptor we leak it. IOWs, the new behaviour introduced in > this patch is actually the correct behaviour. Maybe fix this issue first in a separate patch, instead of hiding it in a bigger one. From BATV+5c8b8fc841e426a1fab9+2657+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 2 05:39:06 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2Bd6Hq014506 for ; Thu, 2 Dec 2010 05:39:06 -0600 X-ASG-Debug-ID: 1291290050-739201ed0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9C5581C888FB for ; Thu, 2 Dec 2010 03:40:50 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 5sagJsvC2a0Yp2Lj for ; Thu, 02 Dec 2010 03:40:50 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PO7Ws-0006Gn-19; Thu, 02 Dec 2010 11:40:50 +0000 Date: Thu, 2 Dec 2010 06:40:50 -0500 From: Christoph Hellwig To: Dave Chinner Cc: Christoph Hellwig , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 02/14] xfs: clean up log space grant functions Subject: Re: [PATCH 02/14] xfs: clean up log space grant functions Message-ID: <20101202114049.GB21365@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-3-git-send-email-david@fromorbit.com> <20101201123032.GA20378@infradead.org> <20101202014833.GN16922@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101202014833.GN16922@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291290050 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02, 2010 at 12:48:33PM +1100, Dave Chinner wrote: > Ok, so your main objection is the needless addition to the queue? > That can be avoided easily enough via a local variable. Would that > be sufficient to alleviate your concerns? The main objection is that the new code might be a bit shorted, but is a lot less readable. If you really want it go with it and an updated changelog mentioning the behaviour change, but I don't really feel too good about it. From BATV+5c8b8fc841e426a1fab9+2657+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 2 05:45:43 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2BjhAX014925 for ; Thu, 2 Dec 2010 05:45:43 -0600 X-ASG-Debug-ID: 1291290447-1619001a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 67668140521E for ; Thu, 2 Dec 2010 03:47:27 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id N3Shda6FvUSZqRSW for ; Thu, 02 Dec 2010 03:47:27 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PO7dG-00079U-Iu; Thu, 02 Dec 2010 11:47:26 +0000 Date: Thu, 2 Dec 2010 06:47:26 -0500 From: Christoph Hellwig To: Dave Chinner Cc: Christoph Hellwig , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 03/14] xfs: convert log grant heads to LSN notation Subject: Re: [PATCH 03/14] xfs: convert log grant heads to LSN notation Message-ID: <20101202114726.GC21365@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-4-git-send-email-david@fromorbit.com> <20101201130504.GA18379@infradead.org> <20101202020132.GP16922@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101202020132.GP16922@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291290447 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02, 2010 at 01:01:32PM +1100, Dave Chinner wrote: > On Wed, Dec 01, 2010 at 08:05:04AM -0500, Christoph Hellwig wrote: > > > -STATIC int xlog_space_left(xlog_t *log, int cycle, int bytes); > > > +STATIC int xlog_space_left(int logsize, xfs_lsn_t tail_lsn, > > > + xfs_lsn_t head); > > > > Looking further through the series I have to say I really hate > > passing in the logsize instead of the log structure. Passing the > > log pointer from higher level functions just makes a lot more sense. > > > > Also in this case passing the tail_lsn explicitly doesn't make any sense > > - it becomes atomic later and thus there is no locking requirement for > > it. > > What I wanted to make clear is that the calculation works on fixed > values and doesn't sample values internally itself. I guess that's > not important for the log size, but for stuff like the tail lsn > it avoids needing to sample inside xlog_space_left() before we > crack it. i.e. something like this is wrong: > > cycle = CYCLE_LSN(atomic64_read(&log->l_tail_lsn)); > block = BLOCK_LSN(atomic64_read(&log->l_tail_lsn)); > > and this is correct: > > tail_lsn = atomic64_read(&log->l_tail_lsn); > cycle = CYCLE_LSN(tail_lsn); > block = BLOCK_LSN(tail_lsn); > > So it makes sense to me to have the value of of the tail lsn and > other variables that should only be sampled once passed into the > function. That avoids misunderstandings further down the track > because it is obvious that the calculation works on constant values. > Perhaps I should add "const" to the parameter declarations to help > make my intentions clear... I don't think obsfucating the code is a good idea to reach this goal. What might be better is a helper like: static inline void xlog_crack_lsn(atomic64_t *lsn, int *cycle, int *block) { xfs_lsn_t = atomic64_read(lsn); *cycle = CYCLE_LSN(tail_lsn); *block = BLOCK_LSN(tail_lsn); } and a long comment explaining how it needs to be used. > I thought about that - my first version even did this. I thought it > was easier to understand the changes if I didn't change the calling > conventions for modifying the grant heads. As such, I'd prefer to > make this change to the wrappers in a separate patch. Heh, when looking at the patch I actually found this part pretty hard to read already. So moving the factoring of the helpers out into a separate patch might indeed be a good idea, and that patch can also remove the wrappers. From BATV+5c8b8fc841e426a1fab9+2657+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 2 05:46:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,SUBJ_TICKET autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2BkNHF014979 for ; Thu, 2 Dec 2010 05:46:23 -0600 X-ASG-Debug-ID: 1291290487-166f00210000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8B5981405227 for ; Thu, 2 Dec 2010 03:48:07 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id H6v1SpJnSIoNaLOG for ; Thu, 02 Dec 2010 03:48:07 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PO7du-0007Bg-QT; Thu, 02 Dec 2010 11:48:06 +0000 Date: Thu, 2 Dec 2010 06:48:06 -0500 From: Christoph Hellwig To: Dave Chinner Cc: Christoph Hellwig , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 09/14] xfs: introduce new locks for the log grant ticket wait queues Subject: Re: [PATCH 09/14] xfs: introduce new locks for the log grant ticket wait queues Message-ID: <20101202114806.GD21365@infradead.org> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-10-git-send-email-david@fromorbit.com> <20101201131208.GA22455@infradead.org> <20101202021031.GT16922@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101202021031.GT16922@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291290487 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02, 2010 at 01:10:31PM +1100, Dave Chinner wrote: > On Wed, Dec 01, 2010 at 08:12:08AM -0500, Christoph Hellwig wrote: > > > + /* co-ordinate with xfs_log_force_shutdown */ > > > + if (XLOG_FORCED_SHUTDOWN(log)) { > > > + spin_unlock(&log->l_grant_reserve_lock); > > > + goto error_return; > > > + } > > > > Where is this coming from? Otherwise the patch looks good to me. > > To handles the race condition between xfs_log_force_shutdown() clearing > all the tickets off the queue and a racing log reserve that had > already checked the shutdown flag and was spinning waiting for the > reserve lock to add the ticket to the queue. The race condition is > documented in xfs_log_force_shutdown()... Ok. Please add something like that to the patch description. From denny.priebe@googlemail.com Thu Dec 2 06:18:59 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_DKIM_INVALID autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2CIwqS016629 for ; Thu, 2 Dec 2010 06:18:59 -0600 X-ASG-Debug-ID: 1291292440-06c5029a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-wy0-f181.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8F117160B89E for ; Thu, 2 Dec 2010 04:20:40 -0800 (PST) Received: from mail-wy0-f181.google.com (mail-wy0-f181.google.com [74.125.82.181]) by cuda.sgi.com with ESMTP id gYCpgYZwl0MZ8qKW for ; Thu, 02 Dec 2010 04:20:40 -0800 (PST) Received: by wyf22 with SMTP id 22so8783778wyf.26 for ; Thu, 02 Dec 2010 04:20:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=googlemail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=Pgb3z0h1KXD7mIDBiGuSEQfxpAJQMRLgy/Ask3kLJHA=; b=gtv/RmcLEw0aUmHOj6EQ+/1yoM9LwcNUkUaNyFnsfHIiD6+BStiot7EXxAmzL+LEnx +gPtRKspLR+5Tkmkb3/YBCwIKcDz5Y1aoWku5+bSsk9tgkAxhIX0SZd3O9f88wvUsZKK BeRW9cOt4aumpG5Xj7dOB2kLeHrsIBZg4KE/E= DomainKey-Signature: a=rsa-sha1; c=nofws; d=googlemail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=dLRkvnVyZVkxCaTuPwdibbMza68X2RWRS9sxEGZ0lgEPfY/nFJfTk+4FwQu9359L3m wFPjKVK9EkROpCCjlErwHzCdY29eyhve7Q0GM3Gkb9pbMchMC8QYx57U/ZG3663QM7eI xxSJup9IZNnsagDRk5IAjL9EiE0Tcg4FIW6Ys= MIME-Version: 1.0 Received: by 10.216.48.138 with SMTP id v10mr31687web.66.1291292439423; Thu, 02 Dec 2010 04:20:39 -0800 (PST) Received: by 10.216.18.137 with HTTP; Thu, 2 Dec 2010 04:20:39 -0800 (PST) In-Reply-To: <20101026225839.GZ32255@dastard> References: <20101026225839.GZ32255@dastard> Date: Thu, 2 Dec 2010 12:20:39 +0000 Message-ID: X-ASG-Orig-Subj: Re: Possible deadlock when deleting from realtime section Subject: Re: Possible deadlock when deleting from realtime section From: Denny Priebe To: Dave Chinner Cc: xfs@oss.sgi.com Content-Type: text/plain; charset=ISO-8859-1 X-Barracuda-Connect: mail-wy0-f181.google.com[74.125.82.181] X-Barracuda-Start-Time: 1291292442 X-Barracuda-Bayes: INNOCENT GLOBAL 0.3748 1.0000 -0.0706 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: 0.43 X-Barracuda-Spam-Status: No, SCORE=0.43 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M, DKIM_SIGNED, DKIM_VERIFIED X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48260 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Oct 26, 2010 at 10:58 PM, Dave Chinner wrote: > Hmmm. Looks like we broke recursive inode locking in > xfs_trans_iget() in commit aa72a5cf00001d0b952c7c755be404b9118ceb2e > ("xfs: simplify xfs_trans_iget"). > What we didn't take into account is multiple RT allocator calls in > the same transaction context. Let me think about the best way to fix > this. Is there any news on this? Maybe some patch I could try out? Regards, Denny From amit.sahrawat83@gmail.com Thu Dec 2 06:21:53 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.2 required=5.0 tests=BAYES_00,FREEMAIL_FROM, HTML_MESSAGE,J_CHICKENPOX_83,T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2CLrrG016765 for ; Thu, 2 Dec 2010 06:21:53 -0600 X-ASG-Debug-ID: 1291292615-67f2011c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qw0-f53.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C8D811BC14D for ; Thu, 2 Dec 2010 04:23:35 -0800 (PST) Received: from mail-qw0-f53.google.com (mail-qw0-f53.google.com [209.85.216.53]) by cuda.sgi.com with ESMTP id h3IOyiltgDKwAChJ for ; Thu, 02 Dec 2010 04:23:35 -0800 (PST) Received: by qwe5 with SMTP id 5so8157860qwe.26 for ; Thu, 02 Dec 2010 04:23:34 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=KtjGyAF3BXwyLH8vhsDPunhw5Fs3LPRDTPxIIQTQK9E=; b=PvdVRoz0C6xPQXDZYvkTyYW5/8tjqN4G6+89FW3C1zGL4p1Ntj2oLDnFYxutb61U1/ qwU0OLBmE7OP2stMvDgQbUKDTAc3YGSiIePpbdGcq7da1qLgDHFQ2ItApFr9gGqEU8Ej EsrRnmIqeGXEiOoKeBP5lhpwogVusuo33Tu2Q= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=c+E28sYntqcphII+xzBTu3uRgrfLuO/pQawK4N1STyu6eRC8XqhO2QSQmQrvJE/cVg CA4IE2UU6X9nAl5HyC0o6xlFXXPgFhoUgX2Fe0wOGTwC54aaxbqp1cb7JaWwJP07idTX E/pD3psGCkeQ3aG0JZHxUW9J2fVFQtBpbgLSw= MIME-Version: 1.0 Received: by 10.224.37.141 with SMTP id x13mr1954749qad.76.1291292614166; Thu, 02 Dec 2010 04:23:34 -0800 (PST) Received: by 10.220.194.3 with HTTP; Thu, 2 Dec 2010 04:23:34 -0800 (PST) In-Reply-To: References: <4CF661C7.2020103@sandeen.net> <20101202041312.GX16922@dastard> Date: Thu, 2 Dec 2010 17:53:34 +0530 Message-ID: X-ASG-Orig-Subj: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 Subject: Re: XFS file system corruption(Return Bad Transaction) kernel - 2.6.34 From: Amit Sahrawat To: Dave Chinner Cc: Eric Sandeen , xfs@oss.sgi.com, sandeen-xfs@sandeen.net Content-Type: multipart/alternative; boundary=0015175cddbe918a5304966c7de2 X-Barracuda-Connect: mail-qw0-f53.google.com[209.85.216.53] X-Barracuda-Start-Time: 1291292615 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48260 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --0015175cddbe918a5304966c7de2 Content-Type: text/plain; charset=ISO-8859-1 By tracing back to find the cause of the issue: http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.6.31.y.git;a=commitdiff;h=f95022161d23ee661a48af8f280472209f513a67 This patch results in generating different behaviour for write. - it makes dependency on xfssyncd(for which default time out value is 3000centisecs - cat /proc/sys/fs/xfs/xfssyncd_centisecs) - 30secs is too large for committing to disc. So, either this value can be lowered or this patch can be reverted so that pdflush takes care of all this. Removing the changes from this patch seems viable solution at this moment. What do you suggest? Thanks, Amit Sahrawat On Thu, Dec 2, 2010 at 10:08 AM, Amit Sahrawat wrote: > I am not able to reproduce the same behaviour on 2.6.30.9, had it been on > all versions - this can safely be termed as behaviour. But from 2.6.31 > onwards this is very much reproducable, especially the change in behaviour > of writing to disk. > I will try more things and update if I can find anything new in this. > > Thanks, > Amit Sahrawat > > On Thu, Dec 2, 2010 at 9:43 AM, Dave Chinner wrote: > >> On Thu, Dec 02, 2010 at 09:10:08AM +0530, Amit Sahrawat wrote: >> > While the copy operation is in progress, simply unplug the usb device >> and >> > then replug. >> >> That's pretty much a guaranteed recipe for data and filesystem >> corruption regardless of the filesystem you are using. Even if you >> are lucky enough that there was is no IO being issued while the >> device is unplugged, what guarantee is there that the device even >> comes back with the same device name? Further, if the device is usb >> powered, there is no guarantee that the drive caches were >> flushed correctly before the unplug so random log and metadata >> corruptions are definitely possible. >> >> Cheers, >> >> Dave. >> -- >> Dave Chinner >> david@fromorbit.com >> > > --0015175cddbe918a5304966c7de2 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
By tracing back to find the cause of the issue:
This patch results in generating different behaviour for write. - it m= akes dependency on xfssyncd(for which default time out value is 3000centise= cs - cat /proc/sys/fs/xfs/xfssyncd_centisecs) - 30secs is too large for com= mitting to disc.
So, either this value can be lowered or this patch can be reverted so = that pdflush takes care of all this.
Removing the changes from this patch seems viable solution at this mom= ent.
=A0
What do you suggest?
=A0
Thanks,
Amit Sahrawat


=A0
On Thu, Dec 2, 2010 at 10:08 AM, Amit Sahrawat <= span dir=3D"ltr"><amit.sahr= awat83@gmail.com> wrote:
I am not able to reproduce the same behaviour on 2.6.30.9, had it been= on all versions - this can safely be termed as behaviour. But from 2.6.31 = onwards this is very much reproducable, especially the change in behaviour = of writing to disk.
I will try more things and update if I can find anything new in this.<= /div>
=A0
Thanks,
Amit Sahrawat

On Thu, Dec 2, 2010 at 9:43 AM, Dave Chinner <david@fromorbit.com> wrote:
On Thu, Dec 02, 2010 at 09:10:08AM +0530, Amit Sahrawat wrote:
>= While the copy operation is in progress, simply unplug the usb device and<= br>> then replug.

That's pretty much a guaranteed recip= e for data and filesystem
corruption regardless of the filesystem you are using. Even if you
are l= ucky enough that there was is no IO being issued while the
device is unp= lugged, what guarantee is there that the device even
comes back with the= same device name? Further, if the device is usb
powered, there is no guarantee that the drive caches were
flushed correc= tly before the unplug so random log and metadata
corruptions are definit= ely possible.

Cheers,

Dave.
--
Dave Chinner
david@fromorbit.com


--0015175cddbe918a5304966c7de2-- From spelic@shiftmail.org Thu Dec 2 07:54:58 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2Dsv5p021141 for ; Thu, 2 Dec 2010 07:54:58 -0600 X-ASG-Debug-ID: 1291298200-1a3200810000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from BLADE3.ISTI.CNR.IT (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 18A831C88DF7 for ; Thu, 2 Dec 2010 05:56:40 -0800 (PST) Received: from BLADE3.ISTI.CNR.IT (blade3.isti.cnr.it [194.119.192.19]) by cuda.sgi.com with ESMTP id 68BrRAf1qEQrmksx for ; Thu, 02 Dec 2010 05:56:40 -0800 (PST) Received: from SCRIPT-SPFWL-DAEMON.mx.isti.cnr.it by mx.isti.cnr.it (PMDF V6.5 #31825) id <01NUY6C6IIV4LS7885@mx.isti.cnr.it> for xfs@oss.sgi.com; Thu, 02 Dec 2010 14:55:09 +0100 (MET) Received: from conversionlocal.isti.cnr.it by mx.isti.cnr.it (PMDF V6.5 #31825) id <01NUY6C3HEJKLVVT6P@mx.isti.cnr.it> for xfs@oss.sgi.com; Thu, 02 Dec 2010 14:55:05 +0100 (MET) Received: from [192.168.7.52] (firewall.itb.cnr.it [155.253.6.254]) by mx.isti.cnr.it (PMDF V6.5 #31826) with ESMTPSA id <01NUY6C2UEEWLX52AX@mx.isti.cnr.it>; Thu, 02 Dec 2010 14:55:02 +0100 (MET) Date: Thu, 02 Dec 2010 14:55:05 +0100 From: Spelic X-ASG-Orig-Subj: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Subject: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram To: "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, linux-lvm@redhat.com Message-id: <4CF7A539.1050206@shiftmail.org> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=ISO-8859-1 Content-transfer-encoding: 7bit User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.11) Gecko/20100713 Thunderbird/3.0.6 X-INSM-ip-source: 155.253.6.254 Auth Done X-Barracuda-Connect: blade3.isti.cnr.it[194.119.192.19] X-Barracuda-Start-Time: 1291298201 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.12 X-Barracuda-Spam-Status: No, SCORE=-1.12 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M, BSF_SC0_SA085b X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48267 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M 0.40 BSF_SC0_SA085b Custom Rule SA085b X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hello all I noticed what seem to be 4 bugs. (kernel v2.6.37-rc4 but probably also before) First two are one in mkfs.xfs and one in device mapper (lvm mailing list I suppose, otherwise pls forward it): Steps to reproduce: Boot with a large ramdisk, like ramdisk_size=2097152 (actually I had 14GB ramdisk when I tried this but I don't think it will make a difference) Now partition it with a 1GB partition: fdisk /dev/ram0 n p 1 1 +1G w (only one 1GB physical partition) Make a devmapper mapping for the partition kpartx -av /dev/ram0 mkfs.xfs -f /dev/mapper/ram0p1 meta-data=/dev/mapper/ram0p1 isize=256 agcount=4, agsize=66266 blks = sectsz=512 attr=2 data = bsize=4096 blocks=265064, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 log =internal log bsize=4096 blocks=2560, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 Now, lo and behold, partition is gone! fdisk /dev/ram0 p will show no partitions! you can also check with dd if=/dev/ram bs=1M count=1 | hexdump -C All first MB of /dev/ram is zeroed!! also mount /dev/ram0p1 /mnt will fail. Unknown filesystem I think this shows 2 bugs: firstly mkfs.xfs dares to do stuff before the beginning of the device on which it should work. Secondly, device mapper does not constrain access within the boundaries of the device, which I think it should do. Then I have 2 more bugs for you. Please see my thread in linux-rdma called: "NFS-RDMA hangs: connection closed (-103)" in particular this post http://www.mail-archive.com/linux-rdma@vger.kernel.org/msg06632.html with NFS over over Infiniband over XFS over ramdisk it is possible to write a file (2.3GB) which is larger than the size of the device (1.5GB): one bug I think is for XFS people (because I think XFS should check if the space on the filesystem is finished), and another one I think is for /dev/ram people (what mailing list? I am adding lkml), because I think the device should check if someone is writing beyond the end of it. Thank you PS: I am not subscribed to lkml so please do not reply ONLY to lkml. From BATV+5c8b8fc841e426a1fab9+2657+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 2 08:09:54 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2E9qbN021898 for ; Thu, 2 Dec 2010 08:09:54 -0600 X-ASG-Debug-ID: 1291299096-125b03cd0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 5E6231BCA70 for ; Thu, 2 Dec 2010 06:11:36 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id ECjlYSBqnqp1Vghw for ; Thu, 02 Dec 2010 06:11:36 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PO9sk-0006VT-9U; Thu, 02 Dec 2010 14:11:34 +0000 Date: Thu, 2 Dec 2010 09:11:34 -0500 From: Christoph Hellwig To: Spelic Cc: "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, linux-lvm@redhat.com X-ASG-Orig-Subj: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Message-ID: <20101202141134.GA22012@infradead.org> References: <4CF7A539.1050206@shiftmail.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4CF7A539.1050206@shiftmail.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291299096 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean I'm pretty sure you have CONFIG_DEBUG_BLOCK_EXT_DEVT enabled. This option must never be enabled, as it causes block devices to be randomly renumered. Together with the ramdisk driver overloading the BLKFLSBUF ioctl to discard all data it guarantees you to get data loss like yours. From spelic@shiftmail.org Thu Dec 2 08:14:09 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2EE9TX022176 for ; Thu, 2 Dec 2010 08:14:09 -0600 X-ASG-Debug-ID: 1291299351-12cd01d70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx2.isti.cnr.it (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 505351E94300 for ; Thu, 2 Dec 2010 06:15:51 -0800 (PST) Received: from mx2.isti.cnr.it (mx2.isti.cnr.it [194.119.192.4]) by cuda.sgi.com with ESMTP id qxG8AlpsczvgWYoB for ; Thu, 02 Dec 2010 06:15:51 -0800 (PST) Received: from SCRIPT-SPFWL-DAEMON.mx.isti.cnr.it by mx.isti.cnr.it (PMDF V6.5 #31825) id <01NUY70BGTDSLVVTNA@mx.isti.cnr.it> for xfs@oss.sgi.com; Thu, 02 Dec 2010 15:14:39 +0100 (MET) Received: from conversionlocal.isti.cnr.it by mx.isti.cnr.it (PMDF V6.5 #31825) id <01NUY706M72OLS71Q6@mx.isti.cnr.it> for xfs@oss.sgi.com; Thu, 02 Dec 2010 15:14:32 +0100 (MET) Received: from [192.168.7.52] (firewall.itb.cnr.it [155.253.6.254]) by mx.isti.cnr.it (PMDF V6.5 #31826) with ESMTPSA id <01NUY704GITULX4XXJ@mx.isti.cnr.it>; Thu, 02 Dec 2010 15:14:26 +0100 (MET) Date: Thu, 02 Dec 2010 15:14:28 +0100 From: Spelic X-ASG-Orig-Subj: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram In-reply-to: <20101202141134.GA22012@infradead.org> To: Christoph Hellwig Cc: "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, linux-lvm@redhat.com Message-id: <4CF7A9C4.2040607@shiftmail.org> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=ISO-8859-1 Content-transfer-encoding: 7bit User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.11) Gecko/20100713 Thunderbird/3.0.6 X-INSM-ip-source: 155.253.6.254 Auth Done References: <4CF7A539.1050206@shiftmail.org> <20101202141134.GA22012@infradead.org> X-Barracuda-Connect: mx2.isti.cnr.it[194.119.192.4] X-Barracuda-Start-Time: 1291299353 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48267 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/02/2010 03:11 PM, Christoph Hellwig wrote: > I'm pretty sure you have CONFIG_DEBUG_BLOCK_EXT_DEVT enabled. This > option must never be enabled, as it causes block devices to be > randomly renumered. Together with the ramdisk driver overloading > the BLKFLSBUF ioctl to discard all data it guarantees you to get > data loss like yours. > Nope... # CONFIG_DEBUG_BLOCK_EXT_DEVT is not set From spelic@shiftmail.org Thu Dec 2 08:14:10 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2EE9hc022179 for ; Thu, 2 Dec 2010 08:14:09 -0600 X-ASG-Debug-ID: 1291299351-681602a70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx2.isti.cnr.it (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8F1211405B41 for ; Thu, 2 Dec 2010 06:15:52 -0800 (PST) Received: from mx2.isti.cnr.it (mx2.isti.cnr.it [194.119.192.4]) by cuda.sgi.com with ESMTP id VPu7M0CINZM8zeM8 for ; Thu, 02 Dec 2010 06:15:52 -0800 (PST) Received: from SCRIPT-SPFWL-DAEMON.mx.isti.cnr.it by mx.isti.cnr.it (PMDF V6.5 #31825) id <01NUY70IQ3Q8LS7BA9@mx.isti.cnr.it> for xfs@oss.sgi.com; Thu, 02 Dec 2010 15:15:00 +0100 (MET) Received: from conversionlocal.isti.cnr.it by mx.isti.cnr.it (PMDF V6.5 #31825) id <01NUY70FXFGGLS76YD@mx.isti.cnr.it> for xfs@oss.sgi.com; Thu, 02 Dec 2010 15:14:41 +0100 (MET) Received: from [192.168.7.52] (firewall.itb.cnr.it [155.253.6.254]) by mx.isti.cnr.it (PMDF V6.5 #31826) with ESMTPSA id <01NUY70CQOTKLX4XXJ@mx.isti.cnr.it>; Thu, 02 Dec 2010 15:14:36 +0100 (MET) Date: Thu, 02 Dec 2010 15:14:39 +0100 From: Spelic X-ASG-Orig-Subj: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram In-reply-to: <4CF7A539.1050206@shiftmail.org> To: Spelic Cc: "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, linux-lvm@redhat.com Message-id: <4CF7A9CF.2020904@shiftmail.org> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=ISO-8859-1 Content-transfer-encoding: 7bit User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.11) Gecko/20100713 Thunderbird/3.0.6 X-INSM-ip-source: 155.253.6.254 Auth Done References: <4CF7A539.1050206@shiftmail.org> X-Barracuda-Connect: mx2.isti.cnr.it[194.119.192.4] X-Barracuda-Start-Time: 1291299353 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA_TO_FROM_ADDR_MATCH X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48268 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_SC0_SA_TO_FROM_ADDR_MATCH Sender Address Matches Recipient Address X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Sorry for replying to my own email already one more thing on the 3rd bug: On 12/02/2010 02:55 PM, Spelic wrote: > Hello all > [CUT] > ....... > with NFS over over Infiniband over XFS over ramdisk it > is possible to write a file (2.3GB) which is larger than This is also reproducible with: NFS over TCP over Ethernet over XFS over ramdisk. You don't need infiniband for this. With ethernet it doesn't hang (that's another bug, for RDMA people, in the othter thread) but the file is still 1.9GB, i.e. larger than the device. Look, after running the test over ethernet, at server side: # ll -h /mnt/ram total 1.5G drwxr-xr-x 2 root root 21 2010-12-02 12:54 ./ drwxr-xr-x 3 root root 4.0K 2010-11-29 23:51 ../ -rw-r--r-- 1 root root 1.9G 2010-12-02 15:04 zerofile # mount rpc_pipefs on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) /dev/sda1 on / type ext4 (rw,errors=remount-ro) proc on /proc type proc (rw,noexec,nosuid,nodev) none on /sys type sysfs (rw,noexec,nosuid,nodev) none on /sys/fs/fuse/connections type fusectl (rw) none on /sys/kernel/debug type debugfs (rw) none on /sys/kernel/security type securityfs (rw) devtmpfs on /dev type devtmpfs (rw,mode=0755) none on /dev/pts type devpts (rw,noexec,nosuid,gid=5,mode=0620) none on /dev/shm type tmpfs (rw,nosuid,nodev) none on /var/run type tmpfs (rw,nosuid,mode=0755) none on /var/lock type tmpfs (rw,noexec,nosuid,nodev) none on /lib/init/rw type tmpfs (rw,nosuid,mode=0755) nfsd on /proc/fs/nfsd type nfsd (rw) binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw,noexec,nosuid,nodev) /dev/ram0 on /mnt/ram type xfs (rw) # blockdev --getsize64 /dev/ram0 1610612736 # dd if=/mnt/ram/zerofile | wc -c 1985937408 3878784+0 records in 3878784+0 records out 1985937408 bytes (2.0 GB) copied, 6.57081 s, 302 MB/s Feel free to forward to NFS mailing list also if you think it's appropriate. Thank you From BATV+5c8b8fc841e426a1fab9+2657+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 2 08:15:55 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2EFsZ9022289 for ; Thu, 2 Dec 2010 08:15:55 -0600 X-ASG-Debug-ID: 1291299458-206601370000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DA7AD1E94327 for ; Thu, 2 Dec 2010 06:17:38 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id OjZJoT8GMQJtNhkQ for ; Thu, 02 Dec 2010 06:17:38 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PO9yb-0007om-6Q; Thu, 02 Dec 2010 14:17:37 +0000 Date: Thu, 2 Dec 2010 09:17:37 -0500 From: Christoph Hellwig To: Spelic Cc: Christoph Hellwig , "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, linux-lvm@redhat.com X-ASG-Orig-Subj: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Message-ID: <20101202141737.GA29799@infradead.org> References: <4CF7A539.1050206@shiftmail.org> <20101202141134.GA22012@infradead.org> <4CF7A9C4.2040607@shiftmail.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4CF7A9C4.2040607@shiftmail.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291299458 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02, 2010 at 03:14:28PM +0100, Spelic wrote: > On 12/02/2010 03:11 PM, Christoph Hellwig wrote: > >I'm pretty sure you have CONFIG_DEBUG_BLOCK_EXT_DEVT enabled. This > >option must never be enabled, as it causes block devices to be > >randomly renumered. Together with the ramdisk driver overloading > >the BLKFLSBUF ioctl to discard all data it guarantees you to get > >data loss like yours. > > Nope... > > # CONFIG_DEBUG_BLOCK_EXT_DEVT is not set Hmm, I suspect dm-linear's dumb forwarding of ioctls has the same effect. From aelder@sgi.com Thu Dec 2 10:41:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2GfNXO029777 for ; Thu, 2 Dec 2010 10:41:23 -0600 Received: from stout.americas.sgi.com (stout.americas.sgi.com [128.162.232.50]) by relay3.corp.sgi.com (Postfix) with ESMTP id 5F451AC006; Thu, 2 Dec 2010 08:43:04 -0800 (PST) Received: from stout.americas.sgi.com (localhost6.localdomain6 [127.0.0.1]) by stout.americas.sgi.com (8.14.4/8.14.2) with ESMTP id oB2Gh3r9006179; Thu, 2 Dec 2010 10:43:03 -0600 Received: (from aelder@localhost) by stout.americas.sgi.com (8.14.4/8.14.4/Submit) id oB2Gh3JL006178; Thu, 2 Dec 2010 10:43:03 -0600 From: Alex Elder Message-Id: <201012021643.oB2Gh3JL006178@stout.americas.sgi.com> Date: Thu, 02 Dec 2010 10:43:03 -0600 To: torvalds@linux-foundation.org Subject: [GIT PULL] XFS update for 2.6.37-rc5 Cc: linux-kernel@vger.kernel.org, xfs@oss.sgi.com, akpm@linux-foundation.org User-Agent: Heirloom mailx 12.5 7/5/10 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Linus, please pull the following five XFS bug fixes for 2.6.37. -Alex The following changes since commit 22a5b566c8c442b0b35b3b106795e2f2b3578096: Merge branch 'for_linus' of git://github.com/at91linux/linux-2.6-at91 (2010-11-30 17:57:57 -0800) are available in the git repository at: git://oss.sgi.com/xfs/xfs for-linus Dave Chinner (5): xfs: fix failed write truncation handling. xfs: push stale, pinned buffers on trylock failures xfs: delayed alloc blocks beyond EOF are valid after writeback xfs: avoid moving stale inodes in the AIL xfs: only run xfs_error_test if error injection is active fs/xfs/linux-2.6/xfs_aops.c | 94 ++++++++++++++++++------------------------ fs/xfs/linux-2.6/xfs_buf.c | 35 +++++++--------- fs/xfs/xfs_bmap.c | 85 ++++++++++++++++++++++++++++++++++++++- fs/xfs/xfs_bmap.h | 5 ++ fs/xfs/xfs_dfrag.c | 13 ++++++ fs/xfs/xfs_error.c | 3 + fs/xfs/xfs_error.h | 5 +- fs/xfs/xfs_inode_item.c | 31 +++++++++++--- 8 files changed, 188 insertions(+), 83 deletions(-) From msnitzer@redhat.com Thu Dec 2 15:21:03 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2LL2Jg041167 for ; Thu, 2 Dec 2010 15:21:03 -0600 X-ASG-Debug-ID: 1291324966-1fd003610000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 414491BE224 for ; Thu, 2 Dec 2010 13:22:46 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id yDVCpbiFyUxs9S6S for ; Thu, 02 Dec 2010 13:22:46 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oB2LMYvk030630 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 2 Dec 2010 16:22:34 -0500 Received: from localhost (dhcp-100-19-150.bos.redhat.com [10.16.19.150]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id oB2LMS4R002275 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Thu, 2 Dec 2010 16:22:28 -0500 Date: Thu, 2 Dec 2010 16:22:27 -0500 From: Mike Snitzer To: LVM general discussion and development Cc: Spelic , Christoph Hellwig , "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, npiggin@kernel.dk, dm-devel@redhat.com X-ASG-Orig-Subj: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Message-ID: <20101202212227.GA22703@redhat.com> References: <4CF7A539.1050206@shiftmail.org> <20101202141134.GA22012@infradead.org> <4CF7A9C4.2040607@shiftmail.org> <20101202141737.GA29799@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101202141737.GA29799@infradead.org> User-Agent: Mutt/1.5.21 (2010-09-15) X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291324967 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02 2010 at 9:17am -0500, Christoph Hellwig wrote: > On Thu, Dec 02, 2010 at 03:14:28PM +0100, Spelic wrote: > > On 12/02/2010 03:11 PM, Christoph Hellwig wrote: > > >I'm pretty sure you have CONFIG_DEBUG_BLOCK_EXT_DEVT enabled. This > > >option must never be enabled, as it causes block devices to be > > >randomly renumered. Together with the ramdisk driver overloading > > >the BLKFLSBUF ioctl to discard all data it guarantees you to get > > >data loss like yours. > > > > Nope... > > > > # CONFIG_DEBUG_BLOCK_EXT_DEVT is not set > > Hmm, I suspect dm-linear's dumb forwarding of ioctls has the same > effect. For the benefit of others: - mkfs.xfs will avoid sending BLKFLSBUF to any device whose major is ramdisk's major, this dates back to 2004: http://oss.sgi.com/archives/xfs/2004-08/msg00463.html - but because a kpartx partition overlay (linear DM mapping) is used for the /dev/ram0p1 device, mkfs.xfs only sees a device with DM's major - so mkfs.xfs sends BLKFLSBUF to the DM device blissfully unaware that the backing device (behind the DM linear target) is a brd device - DM will forward the BLKFLSBUF ioctl to brd, which triggers drivers/block/brd.c:brd_ioctl (nuking the entire ramdisk in the process) So coming full circle this is what hch was referring to when he mentioned: 1) "ramdisk driver overloading the BLKFLSBUF ioctl ..." 2) "dm-linear's dumb forwarding of ioctls ..." I really can't see DM adding a specific check for ramdisk's major when forwarding the BLKFLSBUF ioctl. brd has direct partition support (see commit d7853d1f8932c) so maybe kpartx should just blacklist /dev/ram devices? Alternatively, what about switching brd away from overloading BLKFLSBUF to a real implementation of (overloaded) BLKDISCARD support in brd.c? One that doesn't blindly nuke the entire device but that properly processes the discard request. Mike From msnitzer@redhat.com Thu Dec 2 16:06:35 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2M6Ybd043219 for ; Thu, 2 Dec 2010 16:06:35 -0600 X-ASG-Debug-ID: 1291327698-6ba800bf0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 84B431BE190 for ; Thu, 2 Dec 2010 14:08:18 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id bKZwh1D1QxYAFsAm for ; Thu, 02 Dec 2010 14:08:18 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oB2M8CQX024459 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 2 Dec 2010 17:08:12 -0500 Received: from localhost (dhcp-100-19-150.bos.redhat.com [10.16.19.150]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id oB2M85VB020026 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Thu, 2 Dec 2010 17:08:06 -0500 Date: Thu, 2 Dec 2010 17:08:05 -0500 From: Mike Snitzer To: LVM general discussion and development Cc: Spelic , Christoph Hellwig , "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, npiggin@kernel.dk, dm-devel@redhat.com, tytso@mit.edu X-ASG-Orig-Subj: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Message-ID: <20101202220805.GA23388@redhat.com> References: <4CF7A539.1050206@shiftmail.org> <20101202141134.GA22012@infradead.org> <4CF7A9C4.2040607@shiftmail.org> <20101202141737.GA29799@infradead.org> <20101202212227.GA22703@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101202212227.GA22703@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291327699 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02 2010 at 4:22pm -0500, Mike Snitzer wrote: > On Thu, Dec 02 2010 at 9:17am -0500, > Christoph Hellwig wrote: > > > On Thu, Dec 02, 2010 at 03:14:28PM +0100, Spelic wrote: > > > On 12/02/2010 03:11 PM, Christoph Hellwig wrote: > > > >I'm pretty sure you have CONFIG_DEBUG_BLOCK_EXT_DEVT enabled. This > > > >option must never be enabled, as it causes block devices to be > > > >randomly renumered. Together with the ramdisk driver overloading > > > >the BLKFLSBUF ioctl to discard all data it guarantees you to get > > > >data loss like yours. > > > > > > Nope... > > > > > > # CONFIG_DEBUG_BLOCK_EXT_DEVT is not set > > > > Hmm, I suspect dm-linear's dumb forwarding of ioctls has the same > > effect. > > For the benefit of others: > - mkfs.xfs will avoid sending BLKFLSBUF to any device whose major is > ramdisk's major, this dates back to 2004: > http://oss.sgi.com/archives/xfs/2004-08/msg00463.html > - but because a kpartx partition overlay (linear DM mapping) is used for > the /dev/ram0p1 device, mkfs.xfs only sees a device with DM's major > - so mkfs.xfs sends BLKFLSBUF to the DM device blissfully unaware that > the backing device (behind the DM linear target) is a brd device > - DM will forward the BLKFLSBUF ioctl to brd, which triggers > drivers/block/brd.c:brd_ioctl (nuking the entire ramdisk in the > process) > > So coming full circle this is what hch was referring to when he > mentioned: > 1) "ramdisk driver overloading the BLKFLSBUF ioctl ..." > 2) "dm-linear's dumb forwarding of ioctls ..." > > I really can't see DM adding a specific check for ramdisk's major when > forwarding the BLKFLSBUF ioctl. > > brd has direct partition support (see commit d7853d1f8932c) so maybe > kpartx should just blacklist /dev/ram devices? > > Alternatively, what about switching brd away from overloading BLKFLSBUF > to a real implementation of (overloaded) BLKDISCARD support in brd.c? > One that doesn't blindly nuke the entire device but that properly > processes the discard request. Hmm, any chance we could revisit this approach? http://lkml.indiana.edu/hypermail/linux/kernel/0405.3/0998.html From SRS0+MKu5+5+fromorbit.com=david@internode.on.net Thu Dec 2 16:43:28 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2MhROQ044750 for ; Thu, 2 Dec 2010 16:43:28 -0600 X-ASG-Debug-ID: 1291329908-409402ba0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 51346137A73E for ; Thu, 2 Dec 2010 14:45:09 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id eWZXz8OSPff13P7d for ; Thu, 02 Dec 2010 14:45:09 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48357133-1927428 for multiple; Fri, 03 Dec 2010 09:15:07 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1POHti-0007hj-6h; Fri, 03 Dec 2010 09:45:06 +1100 Date: Fri, 3 Dec 2010 09:45:06 +1100 From: Dave Chinner To: Ajeet Yadav Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: XFS mount fail: XFS_WANT_CORRUPTED_GOTO fs/xfs/xfs_alloc.c Subject: Re: XFS mount fail: XFS_WANT_CORRUPTED_GOTO fs/xfs/xfs_alloc.c Message-ID: <20101202224506.GY16922@dastard> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1291329911 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48302 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02, 2010 at 12:31:30PM +0530, Ajeet Yadav wrote: > Dear all, > This is XFS fail mount log on linux 2.6.30.9 > > XFS mounting filesystem sda2 > Starting XFS recovery on filesystem: sda2 (logdev: internal) > XFS internal error XFS_WANT_CORRUPTED_GOTO at line 1629 of file > fs/xfs/xfs_alloc.c. Caller 0x80129658 > Call Trace: > [<802dedc8>] dump_stack+0x8/0x34 from[<80127400>] > xfs_free_ag_extent+0x128/0x7ac > [<80127400>] xfs_free_ag_extent+0x128/0x7ac from[<80129658>] > xfs_free_extent+0xb8/0xe8 > [<80129658>] xfs_free_extent+0xb8/0xe8 from[<80163978>] > xlog_recover_process_efi+0x160/0x214 > [<80163978>] xlog_recover_process_efi+0x160/0x214 from[<80163ac4>] > xlog_recover_process_efis+0x98/0x11c > [<80163ac4>] xlog_recover_process_efis+0x98/0x11c from[<8016663c>] > xlog_recover_finish+0x28/0xdc > [<8016663c>] xlog_recover_finish+0x28/0xdc from[<8016aec0>] > xfs_mountfs+0x4d0/0x610 > [<8016aec0>] xfs_mountfs+0x4d0/0x610 from[<80184434>] > xfs_fs_fill_super+0x1fc/0x418 > [<80184434>] xfs_fs_fill_super+0x1fc/0x418 from[<800bae48>] > get_sb_bdev+0x11c/0x1c0 > [<800bae48>] get_sb_bdev+0x11c/0x1c0 from[<80181f20>] > xfs_fs_get_sb+0x20/0x2c > [<80181f20>] xfs_fs_get_sb+0x20/0x2c from[<800b9424>] > vfs_kern_mount+0x68/0xd0 > [<800b9424>] vfs_kern_mount+0x68/0xd0 from[<800b94f0>] > do_kern_mount+0x54/0x118 > [<800b94f0>] do_kern_mount+0x54/0x118 from[<800d44e8>] do_mount+0x7b4/0x828 > [<800d44e8>] do_mount+0x7b4/0x828 from[<800d45f8>] sys_mount+0x9c/0x194 > [<800d45f8>] sys_mount+0x9c/0x194 from[<800102c4>] stack_done+0x20/0x3c > > Failed to recover EFIs on filesystem: sda2 > XFS: log mount finish failed You corrupted a free space btree. Care to tell uswhat test you were running that caused this? Did you pull the plug on the device during a copy again? Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+Ztt8+5+fromorbit.com=david@internode.on.net Thu Dec 2 17:06:17 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB2N6GOW045850 for ; Thu, 2 Dec 2010 17:06:16 -0600 X-ASG-Debug-ID: 1291331278-1d6f013e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 643181BE568 for ; Thu, 2 Dec 2010 15:07:59 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id XcfMHcds7sDUAg62 for ; Thu, 02 Dec 2010 15:07:59 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48608204-1927428 for multiple; Fri, 03 Dec 2010 09:37:45 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1POIFb-0007jg-U3; Fri, 03 Dec 2010 10:07:43 +1100 Date: Fri, 3 Dec 2010 10:07:43 +1100 From: Dave Chinner To: Spelic Cc: "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, linux-lvm@redhat.com X-ASG-Orig-Subj: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Message-ID: <20101202230743.GZ16922@dastard> References: <4CF7A539.1050206@shiftmail.org> <4CF7A9CF.2020904@shiftmail.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4CF7A9CF.2020904@shiftmail.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1291331280 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48303 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02, 2010 at 03:14:39PM +0100, Spelic wrote: > Sorry for replying to my own email already > one more thing on the 3rd bug: > > On 12/02/2010 02:55 PM, Spelic wrote: > >Hello all > >[CUT] > >....... > >with NFS over over Infiniband over XFS over > >ramdisk it is possible to write a file (2.3GB) which is larger > >than > > This is also reproducible with: > NFS over TCP over Ethernet over XFS over ramdisk. > You don't need infiniband for this. > With ethernet it doesn't hang (that's another bug, for RDMA people, > in the othter thread) but the file is still 1.9GB, i.e. larger than > the device. > > > Look, after running the test over ethernet, > at server side: > > # ll -h /mnt/ram > total 1.5G > drwxr-xr-x 2 root root 21 2010-12-02 12:54 ./ > drwxr-xr-x 3 root root 4.0K 2010-11-29 23:51 ../ > -rw-r--r-- 1 root root 1.9G 2010-12-02 15:04 zerofile This is a classic ENOSPC vs NFS client writeback overcommit caching issue. Have a look at the block map output - I bet theres holes in the file and it's only consuming 1.5GB of disk space. use xfs_bmap to check this. du should tell you the same thing. Basically, the NFS client overcommits the server filesystem space by doing local writeback caching. Hence it caches 1.9GB of data before it gets the first ENOSPC error back from the server at around 1.5GB of written data. At that point, the data that gets ENOSPC errors is tossed by the NFS client, and a ENOSPC error is placed on the address space to be reported to the next write/sync call. That gets to the dd process when it's 1.9GB into the write. However, there is still (in this case) 400MB of dirty data in the NFS client cache that it will try to write to the server. Because XFS uses speculative preallocation and reserves some space for metadata allocation during delayed allocation, it's handling of the initial ENOSPC condition can result in some space being freed up again as unused reserved metadata space is returned to the free pool as delalloc occurs during server writeback. This usually takes a second or two to complete. As a result, shortly after the first ENOSPC has been reported and subsequent writes have also ENOSPC, we can have space freed up and another write will succeed. At that point, the write that succeeds will be a different offset to the last one that succeeded, leaving a hole in the file and moving the EOF well past 1.5GB. That will go on until there really is no space left at all or the NFS client has no more dirty data to send. Basically, what you see it not a bug in XFS, it is a result of NFS clients being able to overcommit server filesystem space and the interaction that has with the way the filesystem on the NFS server handles ENOSPC. Cheers, Dave. -- Dave Chinner david@fromorbit.com From stan@hardwarefreak.com Thu Dec 2 18:56:59 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB30uwMC050877 for ; Thu, 2 Dec 2010 18:56:59 -0600 X-ASG-Debug-ID: 1291337922-5645009a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 21307140C06B for ; Thu, 2 Dec 2010 16:58:42 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id VVFDpcpLI1pvjkKH for ; Thu, 02 Dec 2010 16:58:42 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 935C16C0B9 for ; Thu, 2 Dec 2010 18:58:41 -0600 (CST) Message-ID: <4CF840C1.1030301@hardwarefreak.com> Date: Thu, 02 Dec 2010 18:58:41 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs_repair of critical volume Subject: Re: xfs_repair of critical volume References: <75C248E3-2C99-426E-AE7D-9EC543726796@ucsc.edu> <20101117074708.GP22876@dastard> <201012021233.07213@zmi.at> In-Reply-To: <201012021233.07213@zmi.at> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1291337923 X-Barracuda-Bayes: INNOCENT GLOBAL 0.1492 1.0000 -1.1057 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.51 X-Barracuda-Spam-Status: No, SCORE=-0.51 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48309 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Michael Monnerie put forth on 12/2/2010 5:33 AM: > Thanks, and wow: what an amazing filesystem can recover such an event! FSVO "recover". It's definitely amazing that he didn't lose all of his data as a result of his hardware failures and storage configuration. -- Stan From SRS0+srf8+6+fromorbit.com=dave@internode.on.net Thu Dec 2 19:54:14 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_63, J_CHICKENPOX_74 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB31sDh9054378 for ; Thu, 2 Dec 2010 19:54:14 -0600 X-ASG-Debug-ID: 1291341355-5efc015d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8A5D8140CC45 for ; Thu, 2 Dec 2010 17:55:55 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id 01ZTFtFKyjewlBqd for ; Thu, 02 Dec 2010 17:55:55 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48527034-1927428 for ; Fri, 03 Dec 2010 12:25:54 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.71) (envelope-from ) id 1POKsK-0007wk-QZ for xfs@oss.sgi.com; Fri, 03 Dec 2010 12:55:52 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1POKrj-00089z-L9 for xfs@oss.sgi.com; Fri, 03 Dec 2010 12:55:15 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH] xfs: prevent NMI timeouts in cmn_err Subject: [PATCH] xfs: prevent NMI timeouts in cmn_err Date: Fri, 3 Dec 2010 12:55:15 +1100 Message-Id: <1291341315-31338-1-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1291341357 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48313 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner We currently have a global error message buffer in cmn_err that is protected by a spin lock that disables interrupts. Recently there have been reports of NMI timeouts occurring when the console is being flooded by SCSI error reports due to cmn_err() getting stuck trying to print to the console while holding this lock (i.e. with interrupts disabled). The NMI watchdog is seeing this CPU as non-responding and so is triggering a panic. While the trigger for the reported case is SCSI errors, pretty much anything that spams the kernel log could cause this to occur. Realistically the only reason that we have the intemediate message buffer is to prepend the correct kernel log level prefix to the log message. The only reason we have the lock is to protect the global message buffer and the only reason the message buffer is global is to keep it off the stack. Hence if we can avoid needing a global message buffer we avoid needing the lock, and we can do this with a small amount of cleanup and some preprocessor tricks: 1. clean up xfs_cmn_err() panic mask functionality to avoid needing debug code in xfs_cmn_err() 2. remove the couple of "!" message prefixes that still exist that the existing cmn_err() code steps over. 3. redefine CE_* levels directly to KERN_* 4. redefine cmn_err() and friends to use printk() directly via variable argument length macros. By doing this, we can completely remove the cmn_err() code and the lock that is causing the problems, and rely solely on printk() serialisation to ensure that we don't get garbled messages. A series of followup patches is really needed to clean up all the cmn_err() calls and related messages properly, but that results in a series that is not easily back portable to enterprise kernels. Hence this initial fix is only to address the direct problem in the lowest impact way possible. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_sysctl.c | 22 +++++++++++- fs/xfs/support/debug.c | 76 ----------------------------------------- fs/xfs/support/debug.h | 40 +++++++++++++++++----- fs/xfs/xfs_error.c | 31 ----------------- fs/xfs/xfs_error.h | 14 ++----- fs/xfs/xfs_log.c | 2 +- fs/xfs/xfs_log_recover.c | 2 +- 7 files changed, 58 insertions(+), 129 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_sysctl.c b/fs/xfs/linux-2.6/xfs_sysctl.c index 7bb5092..768acd8 100644 --- a/fs/xfs/linux-2.6/xfs_sysctl.c +++ b/fs/xfs/linux-2.6/xfs_sysctl.c @@ -51,6 +51,26 @@ xfs_stats_clear_proc_handler( return ret; } + +STATIC int +xfs_panic_mask_proc_handler( + ctl_table *ctl, + int write, + void __user *buffer, + size_t *lenp, + loff_t *ppos) +{ + int ret, *valp = ctl->data; + + ret = proc_dointvec_minmax(ctl, write, buffer, lenp, ppos); + if (!ret && write) { + xfs_panic_mask = *valp; +#ifdef DEBUG + xfs_panic_mask |= (XFS_PTAG_SHUTDOWN_CORRUPT | XFS_PTAG_LOGRES); +#endif + } + return ret; +} #endif /* CONFIG_PROC_FS */ static ctl_table xfs_table[] = { @@ -77,7 +97,7 @@ static ctl_table xfs_table[] = { .data = &xfs_params.panic_mask.val, .maxlen = sizeof(int), .mode = 0644, - .proc_handler = proc_dointvec_minmax, + .proc_handler = xfs_panic_mask_proc_handler, .extra1 = &xfs_params.panic_mask.min, .extra2 = &xfs_params.panic_mask.max }, diff --git a/fs/xfs/support/debug.c b/fs/xfs/support/debug.c index 975aa10..fa39e98 100644 --- a/fs/xfs/support/debug.c +++ b/fs/xfs/support/debug.c @@ -25,82 +25,6 @@ #include "xfs_mount.h" #include "xfs_error.h" -static char message[1024]; /* keep it off the stack */ -static DEFINE_SPINLOCK(xfs_err_lock); - -/* Translate from CE_FOO to KERN_FOO, err_level(CE_FOO) == KERN_FOO */ -#define XFS_MAX_ERR_LEVEL 7 -#define XFS_ERR_MASK ((1 << 3) - 1) -static const char * const err_level[XFS_MAX_ERR_LEVEL+1] = - {KERN_EMERG, KERN_ALERT, KERN_CRIT, - KERN_ERR, KERN_WARNING, KERN_NOTICE, - KERN_INFO, KERN_DEBUG}; - -void -cmn_err(register int level, char *fmt, ...) -{ - char *fp = fmt; - int len; - ulong flags; - va_list ap; - - level &= XFS_ERR_MASK; - if (level > XFS_MAX_ERR_LEVEL) - level = XFS_MAX_ERR_LEVEL; - spin_lock_irqsave(&xfs_err_lock,flags); - va_start(ap, fmt); - if (*fmt == '!') fp++; - len = vsnprintf(message, sizeof(message), fp, ap); - if (len >= sizeof(message)) - len = sizeof(message) - 1; - if (message[len-1] == '\n') - message[len-1] = 0; - printk("%s%s\n", err_level[level], message); - va_end(ap); - spin_unlock_irqrestore(&xfs_err_lock,flags); - BUG_ON(level == CE_PANIC); -} - -void -xfs_fs_vcmn_err( - int level, - struct xfs_mount *mp, - char *fmt, - va_list ap) -{ - unsigned long flags; - int len = 0; - - level &= XFS_ERR_MASK; - if (level > XFS_MAX_ERR_LEVEL) - level = XFS_MAX_ERR_LEVEL; - - spin_lock_irqsave(&xfs_err_lock,flags); - - if (mp) { - len = sprintf(message, "Filesystem \"%s\": ", mp->m_fsname); - - /* - * Skip the printk if we can't print anything useful - * due to an over-long device name. - */ - if (len >= sizeof(message)) - goto out; - } - - len = vsnprintf(message + len, sizeof(message) - len, fmt, ap); - if (len >= sizeof(message)) - len = sizeof(message) - 1; - if (message[len-1] == '\n') - message[len-1] = 0; - - printk("%s%s\n", err_level[level], message); - out: - spin_unlock_irqrestore(&xfs_err_lock,flags); - - BUG_ON(level == CE_PANIC); -} - void assfail(char *expr, char *file, int line) { diff --git a/fs/xfs/support/debug.h b/fs/xfs/support/debug.h index d2d2046..f659bd0 100644 --- a/fs/xfs/support/debug.h +++ b/fs/xfs/support/debug.h @@ -20,15 +20,37 @@ #include -#define CE_DEBUG 7 /* debug */ -#define CE_CONT 6 /* continuation */ -#define CE_NOTE 5 /* notice */ -#define CE_WARN 4 /* warning */ -#define CE_ALERT 1 /* alert */ -#define CE_PANIC 0 /* panic */ - -extern void cmn_err(int, char *, ...) - __attribute__ ((format (printf, 2, 3))); +#define CE_DEBUG KERN_DEBUG +#define CE_CONT KERN_INFO +#define CE_NOTE KERN_NOTICE +#define CE_WARN KERN_WARNING +#define CE_ALERT KERN_ALERT +#define CE_PANIC KERN_EMERG + +#define cmn_err(lvl, fmt, args...) \ + do { \ + printk(lvl fmt, ## args); \ + BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); \ + } while (0) + +#define xfs_fs_cmn_err(lvl, mp, fmt, args...) \ + do { \ + printk(lvl "Filesystem %s: " fmt, (mp)->m_fsname, ## args); \ + BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); \ + } while (0) + +/* All callers to xfs_cmn_err use CE_ALERT, so don't bother testing lvl */ +#define xfs_cmn_err(panic_tag, lvl, mp, fmt, args...) \ + do { \ + int panic = 0; \ + if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) { \ + printk(KERN_ALERT "XFS: Transforming an alert into a BUG."); \ + panic = 1; \ + } \ + printk(KERN_ALERT "Filesystem %s: " fmt, (mp)->m_fsname, ## args); \ + BUG_ON(panic); \ + } while (0) + extern void assfail(char *expr, char *f, int l); #define ASSERT_ALWAYS(expr) \ diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c index c78cc6a..4c7db74 100644 --- a/fs/xfs/xfs_error.c +++ b/fs/xfs/xfs_error.c @@ -152,37 +152,6 @@ xfs_errortag_clearall(xfs_mount_t *mp, int loud) } #endif /* DEBUG */ - -void -xfs_fs_cmn_err(int level, xfs_mount_t *mp, char *fmt, ...) -{ - va_list ap; - - va_start(ap, fmt); - xfs_fs_vcmn_err(level, mp, fmt, ap); - va_end(ap); -} - -void -xfs_cmn_err(int panic_tag, int level, xfs_mount_t *mp, char *fmt, ...) -{ - va_list ap; - -#ifdef DEBUG - xfs_panic_mask |= (XFS_PTAG_SHUTDOWN_CORRUPT | XFS_PTAG_LOGRES); -#endif - - if (xfs_panic_mask && (xfs_panic_mask & panic_tag) - && (level & CE_ALERT)) { - level &= ~CE_ALERT; - level |= CE_PANIC; - cmn_err(CE_ALERT, "XFS: Transforming an alert into a BUG."); - } - va_start(ap, fmt); - xfs_fs_vcmn_err(level, mp, fmt, ap); - va_end(ap); -} - void xfs_error_report( const char *tag, diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h index f338847..6b518d2 100644 --- a/fs/xfs/xfs_error.h +++ b/fs/xfs/xfs_error.h @@ -162,21 +162,15 @@ extern int xfs_errortag_clearall(xfs_mount_t *mp, int loud); struct xfs_mount; -extern void xfs_fs_vcmn_err(int level, struct xfs_mount *mp, - char *fmt, va_list ap) - __attribute__ ((format (printf, 3, 0))); -extern void xfs_cmn_err(int panic_tag, int level, struct xfs_mount *mp, - char *fmt, ...) - __attribute__ ((format (printf, 4, 5))); -extern void xfs_fs_cmn_err(int level, struct xfs_mount *mp, char *fmt, ...) - __attribute__ ((format (printf, 3, 4))); - extern void xfs_hex_dump(void *p, int length); #define xfs_fs_repair_cmn_err(level, mp, fmt, args...) \ xfs_fs_cmn_err(level, mp, fmt " Unmount and run xfs_repair.", ## args) #define xfs_fs_mount_cmn_err(f, fmt, args...) \ - ((f & XFS_MFSI_QUIET)? (void)0 : cmn_err(CE_WARN, "XFS: " fmt, ## args)) + do { \ + if (!(f & XFS_MFSI_QUIET)) \ + cmn_err(CE_WARN, "XFS: " fmt, ## args); \ + } while (0) #endif /* __XFS_ERROR_H__ */ diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index abdcbd0..2209035 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -431,7 +431,7 @@ xfs_log_mount( cmn_err(CE_NOTE, "XFS mounting filesystem %s", mp->m_fsname); else { cmn_err(CE_NOTE, - "!Mounting filesystem \"%s\" in no-recovery mode. Filesystem will be inconsistent.", + "Mounting filesystem \"%s\" in no-recovery mode. Filesystem will be inconsistent.", mp->m_fsname); ASSERT(mp->m_flags & XFS_MOUNT_RDONLY); } diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 6e7dfbb..411f3a9 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -3934,7 +3934,7 @@ xlog_recover_finish( log->l_flags &= ~XLOG_RECOVERY_NEEDED; } else { cmn_err(CE_DEBUG, - "!Ending clean XFS mount for filesystem: %s\n", + "Ending clean XFS mount for filesystem: %s\n", log->l_mp->m_fsname); } return 0; -- 1.7.2.3 From lmcilroy@redhat.com Thu Dec 2 21:50:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_63, J_CHICKENPOX_74 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB33o0Rw059397 for ; Thu, 2 Dec 2010 21:50:01 -0600 X-ASG-Debug-ID: 1291348304-6039002c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx3-phx2.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 86E4C140D133 for ; Thu, 2 Dec 2010 19:51:44 -0800 (PST) Received: from mx3-phx2.redhat.com (mx3-phx2.redhat.com [209.132.183.24]) by cuda.sgi.com with ESMTP id C8aEQCkSdAmJ8kZ3 for ; Thu, 02 Dec 2010 19:51:44 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from mail05.corp.redhat.com (zmail05.collab.prod.int.phx2.redhat.com [10.5.5.46]) by mx3-phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oB33pW0H003246; Thu, 2 Dec 2010 22:51:32 -0500 Date: Thu, 2 Dec 2010 22:51:32 -0500 (EST) From: Lachlan McIlroy Reply-To: Lachlan McIlroy To: Dave Chinner Cc: xfs@oss.sgi.com Message-ID: <275948151.359301291348292101.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> In-Reply-To: <121488966.359171291347997519.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> X-ASG-Orig-Subj: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Subject: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [10.5.5.71] X-Mailer: Zimbra 5.0.21_GA_3150.RHEL4_64 (ZimbraWebClient - FF3.0 (Linux)/5.0.21_GA_3150.RHEL4_64) X-Barracuda-Connect: mx3-phx2.redhat.com[209.132.183.24] X-Barracuda-Start-Time: 1291348305 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Dave, overall it looks good - just a few minor points below. Thanks for doing this. ----- "Dave Chinner" wrote: > From: Dave Chinner > > We currently have a global error message buffer in cmn_err that is > protected by a spin lock that disables interrupts. Recently there > have been reports of NMI timeouts occurring when the console is > being flooded by SCSI error reports due to cmn_err() getting stuck > trying to print to the console while holding this lock (i.e. with > interrupts disabled). The NMI watchdog is seeing this CPU as > non-responding and so is triggering a panic. While the trigger for > the reported case is SCSI errors, pretty much anything that spams > the kernel log could cause this to occur. > > Realistically the only reason that we have the intemediate message > buffer is to prepend the correct kernel log level prefix to the log > message. The only reason we have the lock is to protect the global > message buffer and the only reason the message buffer is global is > to keep it off the stack. Hence if we can avoid needing a global > message buffer we avoid needing the lock, and we can do this with a > small amount of cleanup and some preprocessor tricks: > > 1. clean up xfs_cmn_err() panic mask functionality to avoid > needing debug code in xfs_cmn_err() > 2. remove the couple of "!" message prefixes that still exist that > the existing cmn_err() code steps over. > 3. redefine CE_* levels directly to KERN_* > 4. redefine cmn_err() and friends to use printk() directly > via variable argument length macros. > > By doing this, we can completely remove the cmn_err() code and the > lock that is causing the problems, and rely solely on printk() > serialisation to ensure that we don't get garbled messages. > > A series of followup patches is really needed to clean up all the > cmn_err() calls and related messages properly, but that results in a > series that is not easily back portable to enterprise kernels. Hence > this initial fix is only to address the direct problem in the lowest > impact way possible. > > Signed-off-by: Dave Chinner > --- > fs/xfs/linux-2.6/xfs_sysctl.c | 22 +++++++++++- > fs/xfs/support/debug.c | 76 > ----------------------------------------- > fs/xfs/support/debug.h | 40 +++++++++++++++++----- > fs/xfs/xfs_error.c | 31 ----------------- > fs/xfs/xfs_error.h | 14 ++----- > fs/xfs/xfs_log.c | 2 +- > fs/xfs/xfs_log_recover.c | 2 +- > 7 files changed, 58 insertions(+), 129 deletions(-) > > diff --git a/fs/xfs/linux-2.6/xfs_sysctl.c > b/fs/xfs/linux-2.6/xfs_sysctl.c > index 7bb5092..768acd8 100644 > --- a/fs/xfs/linux-2.6/xfs_sysctl.c > +++ b/fs/xfs/linux-2.6/xfs_sysctl.c > @@ -51,6 +51,26 @@ xfs_stats_clear_proc_handler( > > return ret; > } > + > +STATIC int > +xfs_panic_mask_proc_handler( > + ctl_table *ctl, > + int write, > + void __user *buffer, > + size_t *lenp, > + loff_t *ppos) > +{ > + int ret, *valp = ctl->data; > + > + ret = proc_dointvec_minmax(ctl, write, buffer, lenp, ppos); > + if (!ret && write) { > + xfs_panic_mask = *valp; > +#ifdef DEBUG > + xfs_panic_mask |= (XFS_PTAG_SHUTDOWN_CORRUPT | XFS_PTAG_LOGRES); > +#endif > + } > + return ret; > +} > #endif /* CONFIG_PROC_FS */ > > static ctl_table xfs_table[] = { > @@ -77,7 +97,7 @@ static ctl_table xfs_table[] = { > .data = &xfs_params.panic_mask.val, > .maxlen = sizeof(int), > .mode = 0644, > - .proc_handler = proc_dointvec_minmax, > + .proc_handler = xfs_panic_mask_proc_handler, > .extra1 = &xfs_params.panic_mask.min, > .extra2 = &xfs_params.panic_mask.max > }, > diff --git a/fs/xfs/support/debug.c b/fs/xfs/support/debug.c > index 975aa10..fa39e98 100644 > --- a/fs/xfs/support/debug.c > +++ b/fs/xfs/support/debug.c > @@ -25,82 +25,6 @@ > #include "xfs_mount.h" > #include "xfs_error.h" > > -static char message[1024]; /* keep it off the stack */ > -static DEFINE_SPINLOCK(xfs_err_lock); > - > -/* Translate from CE_FOO to KERN_FOO, err_level(CE_FOO) == KERN_FOO > */ > -#define XFS_MAX_ERR_LEVEL 7 > -#define XFS_ERR_MASK ((1 << 3) - 1) > -static const char * const err_level[XFS_MAX_ERR_LEVEL+1] = > - {KERN_EMERG, KERN_ALERT, KERN_CRIT, > - KERN_ERR, KERN_WARNING, KERN_NOTICE, > - KERN_INFO, KERN_DEBUG}; > - > -void > -cmn_err(register int level, char *fmt, ...) > -{ > - char *fp = fmt; > - int len; > - ulong flags; > - va_list ap; > - > - level &= XFS_ERR_MASK; > - if (level > XFS_MAX_ERR_LEVEL) > - level = XFS_MAX_ERR_LEVEL; > - spin_lock_irqsave(&xfs_err_lock,flags); > - va_start(ap, fmt); > - if (*fmt == '!') fp++; > - len = vsnprintf(message, sizeof(message), fp, ap); > - if (len >= sizeof(message)) > - len = sizeof(message) - 1; > - if (message[len-1] == '\n') > - message[len-1] = 0; > - printk("%s%s\n", err_level[level], message); > - va_end(ap); > - spin_unlock_irqrestore(&xfs_err_lock,flags); > - BUG_ON(level == CE_PANIC); > -} > - > -void > -xfs_fs_vcmn_err( > - int level, > - struct xfs_mount *mp, > - char *fmt, > - va_list ap) > -{ > - unsigned long flags; > - int len = 0; > - > - level &= XFS_ERR_MASK; > - if (level > XFS_MAX_ERR_LEVEL) > - level = XFS_MAX_ERR_LEVEL; > - > - spin_lock_irqsave(&xfs_err_lock,flags); > - > - if (mp) { > - len = sprintf(message, "Filesystem \"%s\": ", mp->m_fsname); > - > - /* > - * Skip the printk if we can't print anything useful > - * due to an over-long device name. > - */ > - if (len >= sizeof(message)) > - goto out; > - } > - > - len = vsnprintf(message + len, sizeof(message) - len, fmt, ap); > - if (len >= sizeof(message)) > - len = sizeof(message) - 1; > - if (message[len-1] == '\n') > - message[len-1] = 0; > - > - printk("%s%s\n", err_level[level], message); > - out: > - spin_unlock_irqrestore(&xfs_err_lock,flags); > - > - BUG_ON(level == CE_PANIC); > -} > - > void > assfail(char *expr, char *file, int line) > { > diff --git a/fs/xfs/support/debug.h b/fs/xfs/support/debug.h > index d2d2046..f659bd0 100644 > --- a/fs/xfs/support/debug.h > +++ b/fs/xfs/support/debug.h > @@ -20,15 +20,37 @@ > > #include > > -#define CE_DEBUG 7 /* debug */ > -#define CE_CONT 6 /* continuation */ > -#define CE_NOTE 5 /* notice */ > -#define CE_WARN 4 /* warning */ > -#define CE_ALERT 1 /* alert */ > -#define CE_PANIC 0 /* panic */ > - > -extern void cmn_err(int, char *, ...) > - __attribute__ ((format (printf, 2, 3))); > +#define CE_DEBUG KERN_DEBUG > +#define CE_CONT KERN_INFO > +#define CE_NOTE KERN_NOTICE > +#define CE_WARN KERN_WARNING > +#define CE_ALERT KERN_ALERT > +#define CE_PANIC KERN_EMERG > + > +#define cmn_err(lvl, fmt, args...) \ > + do { \ > + printk(lvl fmt, ## args); \ The old cmn_err() routine would append a newline if one was not supplied. As far as I know printk() will not do the same so either we need to fix all calls to cmn_err() to supply a '\n' or add it here (at the risk of having two newlines) - maybe: printk(lvl fmt "\n", ## args); > + BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); \ > + } while (0) > + > +#define xfs_fs_cmn_err(lvl, mp, fmt, args...) \ > + do { \ > + printk(lvl "Filesystem %s: " fmt, (mp)->m_fsname, ## args); \ printk(lvl "Filesystem %s: " fmt "\n", (mp)->m_fsname, ## args); > + BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); \ > + } while (0) > + > +/* All callers to xfs_cmn_err use CE_ALERT, so don't bother testing > lvl */ > +#define xfs_cmn_err(panic_tag, lvl, mp, fmt, args...) \ > + do { \ > + int panic = 0; \ > + if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) { \ > + printk(KERN_ALERT "XFS: Transforming an alert into a BUG."); \ > + panic = 1; \ > + } \ > + printk(KERN_ALERT "Filesystem %s: " fmt, (mp)->m_fsname, ## args); > \ > + BUG_ON(panic); \ > + } while (0) I think we can simplify this case a bit and remove the panic variable, like this: do { \ printk(KERN_ALERT "Filesystem %s: " fmt "\n", (mp)->m_fsname, ## args); if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) { \ printk(KERN_ALERT "XFS: Transforming an alert into a BUG.\n"); \ BUG_ON(1); \ } \ } while (0) This also reorders the messages which I think makes more sense. > + > extern void assfail(char *expr, char *f, int l); > > #define ASSERT_ALWAYS(expr) \ > diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c > index c78cc6a..4c7db74 100644 > --- a/fs/xfs/xfs_error.c > +++ b/fs/xfs/xfs_error.c > @@ -152,37 +152,6 @@ xfs_errortag_clearall(xfs_mount_t *mp, int loud) > } > #endif /* DEBUG */ > > - > -void > -xfs_fs_cmn_err(int level, xfs_mount_t *mp, char *fmt, ...) > -{ > - va_list ap; > - > - va_start(ap, fmt); > - xfs_fs_vcmn_err(level, mp, fmt, ap); > - va_end(ap); > -} > - > -void > -xfs_cmn_err(int panic_tag, int level, xfs_mount_t *mp, char *fmt, > ...) > -{ > - va_list ap; > - > -#ifdef DEBUG > - xfs_panic_mask |= (XFS_PTAG_SHUTDOWN_CORRUPT | XFS_PTAG_LOGRES); > -#endif > - > - if (xfs_panic_mask && (xfs_panic_mask & panic_tag) > - && (level & CE_ALERT)) { > - level &= ~CE_ALERT; > - level |= CE_PANIC; > - cmn_err(CE_ALERT, "XFS: Transforming an alert into a BUG."); > - } > - va_start(ap, fmt); > - xfs_fs_vcmn_err(level, mp, fmt, ap); > - va_end(ap); > -} > - > void > xfs_error_report( > const char *tag, > diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h > index f338847..6b518d2 100644 > --- a/fs/xfs/xfs_error.h > +++ b/fs/xfs/xfs_error.h > @@ -162,21 +162,15 @@ extern int xfs_errortag_clearall(xfs_mount_t > *mp, int loud); > > struct xfs_mount; > > -extern void xfs_fs_vcmn_err(int level, struct xfs_mount *mp, > - char *fmt, va_list ap) > - __attribute__ ((format (printf, 3, 0))); > -extern void xfs_cmn_err(int panic_tag, int level, struct xfs_mount > *mp, > - char *fmt, ...) > - __attribute__ ((format (printf, 4, 5))); > -extern void xfs_fs_cmn_err(int level, struct xfs_mount *mp, char > *fmt, ...) > - __attribute__ ((format (printf, 3, 4))); > - > extern void xfs_hex_dump(void *p, int length); > > #define xfs_fs_repair_cmn_err(level, mp, fmt, args...) \ > xfs_fs_cmn_err(level, mp, fmt " Unmount and run xfs_repair.", ## > args) > > #define xfs_fs_mount_cmn_err(f, fmt, args...) \ > - ((f & XFS_MFSI_QUIET)? (void)0 : cmn_err(CE_WARN, "XFS: " fmt, ## > args)) > + do { \ > + if (!(f & XFS_MFSI_QUIET)) \ > + cmn_err(CE_WARN, "XFS: " fmt, ## args); \ > + } while (0) > > #endif /* __XFS_ERROR_H__ */ > diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c > index abdcbd0..2209035 100644 > --- a/fs/xfs/xfs_log.c > +++ b/fs/xfs/xfs_log.c > @@ -431,7 +431,7 @@ xfs_log_mount( > cmn_err(CE_NOTE, "XFS mounting filesystem %s", mp->m_fsname); > else { > cmn_err(CE_NOTE, > - "!Mounting filesystem \"%s\" in no-recovery mode. Filesystem will > be inconsistent.", > + "Mounting filesystem \"%s\" in no-recovery mode. Filesystem will > be inconsistent.", > mp->m_fsname); > ASSERT(mp->m_flags & XFS_MOUNT_RDONLY); > } > diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c > index 6e7dfbb..411f3a9 100644 > --- a/fs/xfs/xfs_log_recover.c > +++ b/fs/xfs/xfs_log_recover.c > @@ -3934,7 +3934,7 @@ xlog_recover_finish( > log->l_flags &= ~XLOG_RECOVERY_NEEDED; > } else { > cmn_err(CE_DEBUG, > - "!Ending clean XFS mount for filesystem: %s\n", > + "Ending clean XFS mount for filesystem: %s\n", > log->l_mp->m_fsname); > } > return 0; > -- > 1.7.2.3 > > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs From SRS0+ohoZ+6+fromorbit.com=david@internode.on.net Thu Dec 2 22:37:07 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_32, J_CHICKENPOX_33 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB34b6w1061885 for ; Thu, 2 Dec 2010 22:37:07 -0600 X-ASG-Debug-ID: 1291351129-1ebd00650000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 939671BF14B for ; Thu, 2 Dec 2010 20:38:49 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id wXxizzRzz70u7Hqv for ; Thu, 02 Dec 2010 20:38:49 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48350448-1927428 for ; Fri, 03 Dec 2010 15:08:48 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PONPy-00087q-VW for xfs@oss.sgi.com; Fri, 03 Dec 2010 15:38:47 +1100 Date: Fri, 3 Dec 2010 15:38:46 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Subject: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Message-ID: <20101203043846.GB23339@dastard> References: <1291341315-31338-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1291341315-31338-1-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail18.adl2.internode.on.net[150.101.137.103] X-Barracuda-Start-Time: 1291351130 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48324 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, Dec 03, 2010 at 12:55:15PM +1100, Dave Chinner wrote: > From: Dave Chinner > > We currently have a global error message buffer in cmn_err that is > protected by a spin lock that disables interrupts. Recently there > have been reports of NMI timeouts occurring when the console is > being flooded by SCSI error reports due to cmn_err() getting stuck > trying to print to the console while holding this lock (i.e. with > interrupts disabled). The NMI watchdog is seeing this CPU as > non-responding and so is triggering a panic. While the trigger for > the reported case is SCSI errors, pretty much anything that spams > the kernel log could cause this to occur. > > Realistically the only reason that we have the intemediate message > buffer is to prepend the correct kernel log level prefix to the log > message. The only reason we have the lock is to protect the global > message buffer and the only reason the message buffer is global is > to keep it off the stack. Hence if we can avoid needing a global > message buffer we avoid needing the lock, and we can do this with a > small amount of cleanup and some preprocessor tricks: > > 1. clean up xfs_cmn_err() panic mask functionality to avoid > needing debug code in xfs_cmn_err() > 2. remove the couple of "!" message prefixes that still exist that > the existing cmn_err() code steps over. > 3. redefine CE_* levels directly to KERN_* > 4. redefine cmn_err() and friends to use printk() directly > via variable argument length macros. > > By doing this, we can completely remove the cmn_err() code and the > lock that is causing the problems, and rely solely on printk() > serialisation to ensure that we don't get garbled messages. > > A series of followup patches is really needed to clean up all the > cmn_err() calls and related messages properly, but that results in a > series that is not easily back portable to enterprise kernels. Hence > this initial fix is only to address the direct problem in the lowest > impact way possible. FWIW, while these macros are the best way to make a simple backport is possible, I just discovered that mainline has a %pV format operator that allows an implementation like: void xfs_fs_cmn_err( const char *lvl, struct xfs_mount *mp, const char *fmt, ...) { struct va_format vaf; va_list args; va_start(args, fmt); vaf.fmt = fmt; vaf.va = &args; printk("%sFilesystem %s: %pV", lvl, mp->m_fsname, &vaf); va_end(args); BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); } Would this be a preferable method for replacing the existing implementations, or are the macros good enough as the first step of a mainline cleanup? Cheers,,, Dave. -- Dave Chinner david@fromorbit.com From SRS0+BQCf+6+fromorbit.com=david@internode.on.net Thu Dec 2 23:23:06 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB35N6WR063608 for ; Thu, 2 Dec 2010 23:23:06 -0600 X-ASG-Debug-ID: 1291353888-1bf302450000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 6328F1BF58E for ; Thu, 2 Dec 2010 21:24:48 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id 8cf0E186evYVNFKT for ; Thu, 02 Dec 2010 21:24:48 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48410981-1927428 for multiple; Fri, 03 Dec 2010 15:54:47 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1POO8T-0008Ab-Dr; Fri, 03 Dec 2010 16:24:45 +1100 Date: Fri, 3 Dec 2010 16:24:45 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 1/8] xfs: Pull EFI/EFD handling out from under the AIL lock Subject: Re: [PATCH 1/8] xfs: Pull EFI/EFD handling out from under the AIL lock Message-ID: <20101203052445.GC23339@dastard> References: <1290993152-20999-1-git-send-email-david@fromorbit.com> <1290993152-20999-2-git-send-email-david@fromorbit.com> <20101130201734.GA16079@infradead.org> <20101202012841.GL16922@dastard> <20101202113849.GA21365@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101202113849.GA21365@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1291353890 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48328 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02, 2010 at 06:38:49AM -0500, Christoph Hellwig wrote: > On Thu, Dec 02, 2010 at 12:28:41PM +1100, Dave Chinner wrote: > > > - there is a behaviour change about the xfs_trans_del_item call > > > in xfs_efi_item_unpin - before it was protected by the > > > XFS_EFI_CANCELED which was never set, and now it's not. > > > > XFS_EFI_CANCELED has not been set in the code base since > > xfs_efi_cancel() was removed back in 2006 by commit > > 065d312e15902976d256ddaf396a7950ec0350a8 ("[XFS] Remove unused > > iop_abort log item operation), and even then xfs_efi_cancel() was > > never called. I haven't tracked it back further than that (beyond > > git history), but handling of efis in cancelled transactions has > > been broken for a long time. > > > > Basically, when we get an IOP_UNPIN(lip, 1); call from > > xfs_trans_uncommit() (i.e. remove == 1), if we don't free the log > > item descriptor we leak it. IOWs, the new behaviour introduced in > > this patch is actually the correct behaviour. > > Maybe fix this issue first in a separate patch, instead of hiding it > in a bigger one. Ok, I'll split it out. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+EuKW+6+fromorbit.com=david@internode.on.net Fri Dec 3 00:44:08 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB36i8iw068839 for ; Fri, 3 Dec 2010 00:44:08 -0600 X-ASG-Debug-ID: 1291358751-6aa0011c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id EE5041BBBA4 for ; Thu, 2 Dec 2010 22:45:51 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id R0JAypqSAnXnyy86 for ; Thu, 02 Dec 2010 22:45:51 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48057601-1927428 for multiple; Fri, 03 Dec 2010 17:15:50 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1POPOu-0008FY-N7; Fri, 03 Dec 2010 17:45:48 +1100 Date: Fri, 3 Dec 2010 17:45:48 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 02/14] xfs: clean up log space grant functions Subject: Re: [PATCH 02/14] xfs: clean up log space grant functions Message-ID: <20101203064548.GD23339@dastard> References: <1290994712-21376-1-git-send-email-david@fromorbit.com> <1290994712-21376-3-git-send-email-david@fromorbit.com> <20101201123032.GA20378@infradead.org> <20101202014833.GN16922@dastard> <20101202114049.GB21365@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101202114049.GB21365@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1291358752 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0003 1.0000 -2.0194 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48332 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02, 2010 at 06:40:50AM -0500, Christoph Hellwig wrote: > On Thu, Dec 02, 2010 at 12:48:33PM +1100, Dave Chinner wrote: > > Ok, so your main objection is the needless addition to the queue? > > That can be avoided easily enough via a local variable. Would that > > be sufficient to alleviate your concerns? > > The main objection is that the new code might be a bit shorted, > but is a lot less readable. If you really want it go with it and > an updated changelog mentioning the behaviour change, but I don't > really feel too good about it. OK, I'll drop it. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+QyiU+6+fromorbit.com=david@internode.on.net Fri Dec 3 02:35:20 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_63 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB38ZJOl073215 for ; Fri, 3 Dec 2010 02:35:20 -0600 X-ASG-Debug-ID: 1291365421-03da01220000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7A74C1E90C16 for ; Fri, 3 Dec 2010 00:37:01 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id Ullid87kvhgdvJIZ for ; Fri, 03 Dec 2010 00:37:01 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48679845-1927428 for multiple; Fri, 03 Dec 2010 19:07:00 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1POR8V-0008Lx-4j; Fri, 03 Dec 2010 19:36:59 +1100 Date: Fri, 3 Dec 2010 19:36:59 +1100 From: Dave Chinner To: Lachlan McIlroy Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Subject: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Message-ID: <20101203083659.GE23339@dastard> References: <121488966.359171291347997519.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> <275948151.359301291348292101.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <275948151.359301291348292101.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1291365423 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48340 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02, 2010 at 10:51:32PM -0500, Lachlan McIlroy wrote: > Dave, overall it looks good - just a few minor points below. > Thanks for doing this. > > ----- "Dave Chinner" wrote: [snip] > > -void > > -cmn_err(register int level, char *fmt, ...) > > -{ > > - char *fp = fmt; > > - int len; > > - ulong flags; > > - va_list ap; > > - > > - level &= XFS_ERR_MASK; > > - if (level > XFS_MAX_ERR_LEVEL) > > - level = XFS_MAX_ERR_LEVEL; > > - spin_lock_irqsave(&xfs_err_lock,flags); > > - va_start(ap, fmt); > > - if (*fmt == '!') fp++; > > - len = vsnprintf(message, sizeof(message), fp, ap); > > - if (len >= sizeof(message)) > > - len = sizeof(message) - 1; > > - if (message[len-1] == '\n') > > - message[len-1] = 0; ^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > - printk("%s%s\n", err_level[level], message); > > - va_end(ap); > > - spin_unlock_irqrestore(&xfs_err_lock,flags); > > - BUG_ON(level == CE_PANIC); > > -} [snip] > > +#define CE_DEBUG KERN_DEBUG > > +#define CE_CONT KERN_INFO > > +#define CE_NOTE KERN_NOTICE > > +#define CE_WARN KERN_WARNING > > +#define CE_ALERT KERN_ALERT > > +#define CE_PANIC KERN_EMERG > > + > > +#define cmn_err(lvl, fmt, args...) \ > > + do { \ > > + printk(lvl fmt, ## args); \ > > The old cmn_err() routine would append a newline if one was not supplied. > As far as I know printk() will not do the same so either we need to fix > all calls to cmn_err() to supply a '\n' or add it here (at the risk of > having two newlines) - maybe: See above - I think you have it the wrong way around - it looks to me like the old cmn_err() stripped the newline character if it existed, then added one itself. > printk(lvl fmt "\n", ## args); printk() is actually pretty tolerant of missing newlines - if it detects the previous printk() was not newline terminated and the next one starts with a log level that is not KERN_CONT, it will print the new message on a new line automatically. This is the code in vprintk() that handles it: /* Do we have a loglevel in the string? */ if (p[0] == '<') { unsigned char c = p[1]; if (c && p[2] == '>') { switch (c) { case '0' ... '7': /* loglevel */ current_log_level = c - '0'; /* Fallthrough - make sure we're on a new line */ case 'd': /* KERN_DEFAULT */ if (!new_text_line) { emit_log_char('\n'); new_text_line = 1; } /* Fallthrough - skip the loglevel */ case 'c': /* KERN_CONT */ p += 3; break; } } } So we are probably OK not to need additional newlines. Indeed, I didn't notice the output being screwed up without them. ;) I can add them if you want, though. > > > + BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); \ > > + } while (0) > > + > > +#define xfs_fs_cmn_err(lvl, mp, fmt, args...) \ > > + do { \ > > + printk(lvl "Filesystem %s: " fmt, (mp)->m_fsname, ## args); \ > > printk(lvl "Filesystem %s: " fmt "\n", (mp)->m_fsname, ## args); > > > + BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); \ > > + } while (0) > > + > > +/* All callers to xfs_cmn_err use CE_ALERT, so don't bother testing > > lvl */ > > +#define xfs_cmn_err(panic_tag, lvl, mp, fmt, args...) \ > > + do { \ > > + int panic = 0; \ > > + if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) { \ > > + printk(KERN_ALERT "XFS: Transforming an alert into a BUG."); \ > > + panic = 1; \ > > + } \ > > + printk(KERN_ALERT "Filesystem %s: " fmt, (mp)->m_fsname, ## args); > > \ > > + BUG_ON(panic); \ > > + } while (0) > > I think we can simplify this case a bit and remove the panic variable, > like this: > > do { \ > printk(KERN_ALERT "Filesystem %s: " fmt "\n", (mp)->m_fsname, ## args); > if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) { \ > printk(KERN_ALERT "XFS: Transforming an alert into a BUG.\n"); \ > BUG_ON(1); \ > } \ > } while (0) > > This also reorders the messages which I think makes more sense. Definitely. That's a vast improvement. ;) Cheers, Dave. -- Dave Chinner david@fromorbit.com From spelic@shiftmail.org Fri Dec 3 08:06:46 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB3E6kdo090363 for ; Fri, 3 Dec 2010 08:06:46 -0600 X-ASG-Debug-ID: 1291385309-312b012f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from BLADE3.ISTI.CNR.IT (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4A59B1C90452 for ; Fri, 3 Dec 2010 06:08:29 -0800 (PST) Received: from BLADE3.ISTI.CNR.IT (blade3.isti.cnr.it [194.119.192.19]) by cuda.sgi.com with ESMTP id emKIeuHBESkn19E5 for ; Fri, 03 Dec 2010 06:08:29 -0800 (PST) Received: from SCRIPT-SPFWL-DAEMON.mx.isti.cnr.it by mx.isti.cnr.it (PMDF V6.5 #31825) id <01NUZL2FI08GLS7MS1@mx.isti.cnr.it> for xfs@oss.sgi.com; Fri, 03 Dec 2010 15:07:57 +0100 (MET) Received: from conversionlocal.isti.cnr.it by mx.isti.cnr.it (PMDF V6.5 #31825) id <01NUZL2E915SLS7X2C@mx.isti.cnr.it> for xfs@oss.sgi.com; Fri, 03 Dec 2010 15:07:54 +0100 (MET) Received: from [192.168.7.52] (firewall.itb.cnr.it [155.253.6.254]) by mx.isti.cnr.it (PMDF V6.5 #31826) with ESMTPSA id <01NUZL2CKKJ8LX5R9L@mx.isti.cnr.it>; Fri, 03 Dec 2010 15:07:52 +0100 (MET) Date: Fri, 03 Dec 2010 15:07:58 +0100 From: Spelic X-ASG-Orig-Subj: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram In-reply-to: <20101202230743.GZ16922@dastard> To: Dave Chinner Cc: "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, linux-lvm@redhat.com Message-id: <4CF8F9BE.6000604@shiftmail.org> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=ISO-8859-1 Content-transfer-encoding: 7bit User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.11) Gecko/20100713 Thunderbird/3.0.6 X-INSM-ip-source: 155.253.6.254 Auth Done References: <4CF7A539.1050206@shiftmail.org> <4CF7A9CF.2020904@shiftmail.org> <20101202230743.GZ16922@dastard> X-Barracuda-Connect: blade3.isti.cnr.it[194.119.192.19] X-Barracuda-Start-Time: 1291385310 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48361 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/03/2010 12:07 AM, Dave Chinner wrote: > This is a classic ENOSPC vs NFS client writeback overcommit caching > issue. Have a look at the block map output - I bet theres holes in > the file and it's only consuming 1.5GB of disk space. use xfs_bmap > to check this. du should tell you the same thing. > > Yes you are right! root@server:/mnt/ram# ll -h total 1.5G drwxr-xr-x 2 root root 21 2010-12-02 12:54 ./ drwxr-xr-x 3 root root 4.0K 2010-11-29 23:51 ../ -rw-r--r-- 1 root root 1.9G 2010-12-02 15:04 zerofile root@server:/mnt/ram# ls -lsh total 1.5G 1.5G -rw-r--r-- 1 root root 1.9G 2010-12-02 15:04 zerofile (it's a sparse file) root@server:/mnt/ram# xfs_bmap zerofile zerofile: 0: [0..786367]: 786496..1572863 1: [786368..1572735]: 2359360..3145727 2: [1572736..2232319]: 1593408..2252991 3: [2232320..2529279]: 285184..582143 4: [2529280..2531327]: hole 5: [2531328..2816407]: 96..285175 6: [2816408..2971511]: 582144..737247 7: [2971512..2971647]: hole 8: [2971648..2975183]: 761904..765439 9: [2975184..2975743]: hole 10: [2975744..2975751]: 765440..765447 11: [2975752..2977791]: hole 12: [2977792..2977799]: 765480..765487 13: [2977800..2979839]: hole 14: [2979840..2979847]: 765448..765455 15: [2979848..2981887]: hole 16: [2981888..2981895]: 765472..765479 17: [2981896..2983935]: hole 18: [2983936..2983943]: 765456..765463 19: [2983944..2985983]: hole 20: [2985984..2985991]: 765464..765471 21: [2985992..3202903]: hole 22: [3202904..3215231]: 737248..749575 23: [3215232..3239767]: hole 24: [3239768..3252095]: 774104..786431 25: [3252096..3293015]: hole 26: [3293016..3305343]: 749576..761903 27: [3305344..3370839]: hole 28: [3370840..3383167]: 2252992..2265319 29: [3383168..3473239]: hole 30: [3473240..3485567]: 2265328..2277655 31: [3485568..3632983]: hole 32: [3632984..3645311]: 2277656..2289983 33: [3645312..3866455]: hole 34: [3866456..3878783]: 2289984..2302311 (many delayed allocation extents cannot be filled because space on device is finished) However ... > Basically, the NFS client overcommits the server filesystem space by > doing local writeback caching. Hence it caches 1.9GB of data before > it gets the first ENOSPC error back from the server at around 1.5GB > of written data. At that point, the data that gets ENOSPC errors is > tossed by the NFS client, and a ENOSPC error is placed on the > address space to be reported to the next write/sync call. That gets > to the dd process when it's 1.9GB into the write. > I'm no great expert but isn't this a design flaw in NFS? Ok in this case we were lucky it was all zeroes so XFS made a sparse file and could fit a 1.9GB into 1.5GB device size. In general with nonzero data it seems to me you will get data corruption because the NFS client thinks it has written the data while the NFS server really can't write more data than the device size. It's nice that the NFS server does local writeback caching but it should also cache the filesystem's free space (and check it periodically, since nfs-server is presumably not the only process writing in that filesystem) so that it doesn't accept more data than it can really write. Alternatively, when free space drops below 1GB (or a reasonable size based on network speed), nfs-server should turn off filesystem writeback caching. I can't repeat the test with urandom because it's too slow (8MB/sec !?). How come Linux hasn't got an "uurandom" device capable of e.g. 400MB/sec with only very weak randomness? But I have repeated the test over ethernet with a bunch of symlinks to a 100MB file created from urandom: At client side: # time cat randfile{001..020} | pv -b > /mnt/nfsram/randfile 1.95GB real 0m22.978s user 0m0.310s sys 0m5.360s At server side: # ls -lsh ram total 1.5G 1.5G -rw-r--r-- 1 root root 1.7G 2010-12-03 14:43 randfile # xfs_bmap ram/randfile ram/randfile: 0: [0..786367]: 786496..1572863 1: [786368..790527]: 96..4255 2: [790528..1130495]: hole 3: [1130496..1916863]: 2359360..3145727 4: [1916864..2682751]: 1593408..2359295 5: [2682752..3183999]: 285184..786431 6: [3184000..3387207]: 4256..207463 7: [3387208..3387391]: hole 8: [3387392..3391567]: 207648..211823 9: [3391568..3393535]: hole 10: [3393536..3393543]: 211824..211831 11: [3393544..3395583]: hole 12: [3395584..3395591]: 211832..211839 13: [3395592..3397631]: hole 14: [3397632..3397639]: 211856..211863 15: [3397640..3399679]: hole 16: [3399680..3399687]: 211848..211855 17: [3399688..3401727]: hole 18: [3401728..3409623]: 221984..229879 # dd if=/mnt/ram/randfile | wc -c 3409624+0 records in 3409624+0 records out 1745727488 1745727488 bytes (1.7 GB) copied, 5.72443 s, 305 MB/s The file is still sparse, and this time it certainly has data corruption (holes will be read as zeroes). I understand that the client receives Input/output error when this condition is hit, but the file written at server side has apparent size 1.8GB but the valid data in it is not 1.8GB. Is it good semantics? Wouldn't it be better for nfs-server to turn off writeback caching when it approaches a disk-full situation? And then I see another problem: As you see, xfs_fsr shows lots of holes, even with randomfile (this is taken from urandom so you can be sure it hasn't got many zeroes) already from offset 790528 sectors which is far from the disk full situation... First I checked that this does not happen by pushing less than 1.5GB of data. Ok it does not. Then I tried with exactly 15*100MB (files are 100MB, are symliks to a file which was created with dd if=/dev/urandom of=randfile.rnd bs=1M count=100) and this happened: client side: # time cat randfile{001..015} | pv -b > /mnt/nfsram/randfile 1.46GB real 0m18.265s user 0m0.260s sys 0m4.460s (please note: no I/O error at client side! blockdev --getsize64 /dev/ram0 == 1610612736) server side: # ls -ls ram total 1529676 1529676 -rw-r--r-- 1 root root 1571819520 2010-12-03 14:51 randfile # dd if=/mnt/ram/randfile | wc -c 3069960+0 records in 3069960+0 records out 1571819520 1571819520 bytes (1.6 GB) copied, 5.30442 s, 296 MB/s # xfs_bmap ram/randfile ram/randfile: 0: [0..112639]: 96..112735 1: [112640..208895]: 114784..211039 2: [208896..399359]: 285184..475647 3: [399360..401407]: 112736..114783 4: [401408..573439]: 475648..647679 5: [573440..937983]: 786496..1151039 6: [937984..1724351]: 2359360..3145727 7: [1724352..2383871]: 1593408..2252927 8: [2383872..2805695]: 1151040..1572863 9: [2805696..2944447]: 647680..786431 10: [2944448..2949119]: 211040..215711 11: [2949120..3055487]: 2252928..2359295 12: [3055488..3058871]: 215712..219095 13: [3058872..3059711]: hole 14: [3059712..3060143]: 219936..220367 15: [3060144..3061759]: hole 16: [3061760..3061767]: 220368..220375 17: [3061768..3063807]: hole 18: [3063808..3063815]: 220376..220383 19: [3063816..3065855]: hole 20: [3065856..3065863]: 220384..220391 21: [3065864..3067903]: hole 22: [3067904..3067911]: 220392..220399 23: [3067912..3069951]: hole 24: [3069952..3069959]: 220400..220407 Holes in a random file! This is data corruption, and nobody is notified of this data corruption: no error at client side or server side! Is it good semantics? How could client get notified of this? Some kind of fsync maybe? Thank you From npiggin@kernel.dk Fri Dec 3 11:10:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB3HA1aU097359 for ; Fri, 3 Dec 2010 11:10:01 -0600 X-ASG-Debug-ID: 1291396304-53c503dc0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from ipmail06.adl6.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B86801C90E6A for ; Fri, 3 Dec 2010 09:11:44 -0800 (PST) Received: from ipmail06.adl6.internode.on.net (ipmail06.adl6.internode.on.net [150.101.137.145]) by cuda.sgi.com with ESMTP id 8UMxFbXCxpE4bMxN for ; Fri, 03 Dec 2010 09:11:44 -0800 (PST) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AvsEAPuy+Ex5LdV4/2dsb2JhbACjNXLDJ4VIBA Received: from ppp121-45-213-120.lns20.cbr1.internode.on.net (HELO laptop.local0.net) ([121.45.213.120]) by ipmail06.adl6.internode.on.net with ESMTP; 04 Dec 2010 03:41:42 +1030 Received: by laptop.local0.net (Postfix, from userid 1000) id B58542981A; Sat, 4 Dec 2010 04:11:40 +1100 (EST) Date: Sat, 4 Dec 2010 04:11:40 +1100 From: Nick Piggin To: Mike Snitzer Cc: LVM general discussion and development , Spelic , Christoph Hellwig , "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, npiggin@kernel.dk, dm-devel@redhat.com X-ASG-Orig-Subj: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Message-ID: <20101203171140.GA11889@amd> References: <4CF7A539.1050206@shiftmail.org> <20101202141134.GA22012@infradead.org> <4CF7A9C4.2040607@shiftmail.org> <20101202141737.GA29799@infradead.org> <20101202212227.GA22703@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101202212227.GA22703@redhat.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: ipmail06.adl6.internode.on.net[150.101.137.145] X-Barracuda-Start-Time: 1291396305 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48373 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 02, 2010 at 04:22:27PM -0500, Mike Snitzer wrote: > On Thu, Dec 02 2010 at 9:17am -0500, > Christoph Hellwig wrote: > > > On Thu, Dec 02, 2010 at 03:14:28PM +0100, Spelic wrote: > > > On 12/02/2010 03:11 PM, Christoph Hellwig wrote: > > > >I'm pretty sure you have CONFIG_DEBUG_BLOCK_EXT_DEVT enabled. This > > > >option must never be enabled, as it causes block devices to be > > > >randomly renumered. Together with the ramdisk driver overloading > > > >the BLKFLSBUF ioctl to discard all data it guarantees you to get > > > >data loss like yours. > > > > > > Nope... > > > > > > # CONFIG_DEBUG_BLOCK_EXT_DEVT is not set > > > > Hmm, I suspect dm-linear's dumb forwarding of ioctls has the same > > effect. > > For the benefit of others: > - mkfs.xfs will avoid sending BLKFLSBUF to any device whose major is > ramdisk's major, this dates back to 2004: > http://oss.sgi.com/archives/xfs/2004-08/msg00463.html > - but because a kpartx partition overlay (linear DM mapping) is used for > the /dev/ram0p1 device, mkfs.xfs only sees a device with DM's major > - so mkfs.xfs sends BLKFLSBUF to the DM device blissfully unaware that > the backing device (behind the DM linear target) is a brd device > - DM will forward the BLKFLSBUF ioctl to brd, which triggers > drivers/block/brd.c:brd_ioctl (nuking the entire ramdisk in the > process) > > So coming full circle this is what hch was referring to when he > mentioned: > 1) "ramdisk driver overloading the BLKFLSBUF ioctl ..." > 2) "dm-linear's dumb forwarding of ioctls ..." > > I really can't see DM adding a specific check for ramdisk's major when > forwarding the BLKFLSBUF ioctl. > > brd has direct partition support (see commit d7853d1f8932c) so maybe > kpartx should just blacklist /dev/ram devices? > > Alternatively, what about switching brd away from overloading BLKFLSBUF > to a real implementation of (overloaded) BLKDISCARD support in brd.c? > One that doesn't blindly nuke the entire device but that properly > processes the discard request. Yeah the situation really sucks (mkfs.jfs doesn't work on ramdisk for the same reason). I want to unfortunately keep ioctl for compatibility, but adding new saner ones would be welcome. Also, having a non-default config or load time parameter for brd, to skip the special case, if that would help testing on older userspace. DISCARD is actually a problem for rd. To actually get proper correctness, you need to preload brd with pages, otherwise when doing stress tests, IO can require memory allocations and deadlock. If we add a discard that frees pages, that introduces the same problem. If you find any option useful for testing, however, patches are fine -- brd pretty much is only useful for testing nowadays. From tytso@thunk.org Fri Dec 3 12:13:45 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB3IDi4H099887 for ; Fri, 3 Dec 2010 12:13:45 -0600 X-ASG-Debug-ID: 1291400128-03b802b50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from thunker.thunk.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1A6261C91433 for ; Fri, 3 Dec 2010 10:15:28 -0800 (PST) Received: from thunker.thunk.org (thunk.org [69.25.196.29]) by cuda.sgi.com with ESMTP id lrOSMBAjqamrdbsI for ; Fri, 03 Dec 2010 10:15:28 -0800 (PST) Received: from root (helo=tytso-glaptop) by thunker.thunk.org with local-esmtp (Exim 4.50 #1 (Debian)) id 1POaAD-0001bK-S2; Fri, 03 Dec 2010 13:15:21 -0500 Received: from tytso by tytso-glaptop with local (Exim 4.71) (envelope-from ) id 1POaAC-00072v-GP; Fri, 03 Dec 2010 13:15:20 -0500 Date: Fri, 3 Dec 2010 13:15:20 -0500 From: "Ted Ts'o" To: Nick Piggin Cc: Mike Snitzer , LVM general discussion and development , Spelic , Christoph Hellwig , "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, dm-devel@redhat.com X-ASG-Orig-Subj: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Message-ID: <20101203181520.GA26906@thunk.org> Mail-Followup-To: Ted Ts'o , Nick Piggin , Mike Snitzer , LVM general discussion and development , Spelic , Christoph Hellwig , "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, dm-devel@redhat.com References: <4CF7A539.1050206@shiftmail.org> <20101202141134.GA22012@infradead.org> <4CF7A9C4.2040607@shiftmail.org> <20101202141737.GA29799@infradead.org> <20101202212227.GA22703@redhat.com> <20101203171140.GA11889@amd> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101203171140.GA11889@amd> User-Agent: Mutt/1.5.20 (2009-06-14) X-SA-Exim-Connect-IP: X-SA-Exim-Mail-From: tytso@thunk.org X-SA-Exim-Scanned: No (on thunker.thunk.org); SAEximRunCond expanded to false X-Barracuda-Connect: thunk.org[69.25.196.29] X-Barracuda-Start-Time: 1291400129 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48377 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Sat, Dec 04, 2010 at 04:11:40AM +1100, Nick Piggin wrote: > > Alternatively, what about switching brd away from overloading BLKFLSBUF > > to a real implementation of (overloaded) BLKDISCARD support in brd.c? > > One that doesn't blindly nuke the entire device but that properly > > processes the discard request. > > Yeah the situation really sucks (mkfs.jfs doesn't work on ramdisk > for the same reason). > > I want to unfortunately keep ioctl for compatibility, but adding new > saner ones would be welcome. Also, having a non-default config or > load time parameter for brd, to skip the special case, if that would > help testing on older userspace. How many programs actually depend on BLKFLSBUF dropping the pages used in /dev/ram? The fact that it did this at all was a historical accident of how the original /dev/ram was implemented (in the buffer cache directly), and not anything that was intended. I think that's something that we should be able to fix, since the number of programs that knowly operate on the ramdisk is quite small. Just a few system programs used by distributions in their early boot scripts.... So I would argue for dropping the "special" behavior of BLKFLSBUF for /dev/ram. - Ted From ermorris@ucsc.edu Fri Dec 3 18:41:43 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,HTML_MESSAGE autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB40fgiI114194 for ; Fri, 3 Dec 2010 18:41:42 -0600 X-ASG-Debug-ID: 1291423404-085803700000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from ucsc.edu (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 32E021410F8D for ; Fri, 3 Dec 2010 16:43:24 -0800 (PST) Received: from ucsc.edu (email-prod-out-1.ucsc.edu [128.114.129.85]) by cuda.sgi.com with ESMTP id ZSEDVQmgV7tOxMTi for ; Fri, 03 Dec 2010 16:43:24 -0800 (PST) X-UCSC-EDU-Sender: X-UCSC-EDU-Scanned-By: email-prod-out-1 X-UCSC-EDU-Submitted-Via: SMTP [128.114.125.121] X-UCSC-EDU-ClamAVCheck: not spam, ClamAV(signaure=none) X-UCSC-EDU-SpamCheck: No, score=-1.439 required=5 tests=ALL_TRUSTED, HTML_MESSAGE X-UCSC-EDU-SpamScore: X-UCSC-EDU-SpamFlag: NO X-UCSC-EDU-SpamReport: -1.4 ALL_TRUSTED Passed through trusted hosts only via SMTP X-UCSC-EDU-SpamReport: 0.0 HTML_MESSAGE BODY: HTML included in message Received: from [128.114.125.121] (HELO ucsc.edu) by email-prod-out-1.ucsc.edu (CommuniGate Pro SMTP 5.2.13) with ESMTPS id 28624895; Fri, 03 Dec 2010 16:43:25 -0800 Received: by email-prod-fe-2.ucsc.edu (CommuniGate Pro PIPE 5.2.13) with PIPE id 405752112; Fri, 03 Dec 2010 16:43:22 -0800 X-UCSC-EDU-ClamAVCheck: not spam, ClamAV(signaure=none) Received: from [128.114.25.84] (account ermorris@ucsc.edu HELO dhcp-25-84.ucsc.edu) by email-prod-fe-2.ucsc.edu (CommuniGate Pro SMTP 5.2.13) with ESMTPSA id 405752076; Fri, 03 Dec 2010 16:43:08 -0800 X-ASG-Orig-Subj: Re: xfs_repair of critical volume Subject: Re: xfs_repair of critical volume Mime-Version: 1.0 (Apple Message framework v1082) Content-Type: multipart/alternative; boundary=Apple-Mail-2--416424039 From: Eli Morris In-Reply-To: <201012021233.07213@zmi.at> Date: Fri, 3 Dec 2010 16:43:08 -0800 Cc: xfs@oss.sgi.com, Dave Chinner Message-Id: <86C6F4CD-B39B-4702-80E7-350A363D5F55@ucsc.edu> References: <75C248E3-2C99-426E-AE7D-9EC543726796@ucsc.edu> <20101117074708.GP22876@dastard> <201012021233.07213@zmi.at> To: Michael Monnerie X-Mailer: Apple Mail (2.1082) X-Barracuda-Connect: email-prod-out-1.ucsc.edu[128.114.129.85] X-Barracuda-Start-Time: 1291423405 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0003 1.0000 -2.0192 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48404 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 HTML_MESSAGE BODY: HTML included in message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --Apple-Mail-2--416424039 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=iso-8859-1 On Dec 2, 2010, at 3:33 AM, Michael Monnerie wrote: > On Dienstag, 30. November 2010 Eli Morris wrote: >> Thanks for your help with this. I wrote the program and ran it >> through and it looks like we have we able to preserve 44 TB of valid >> data, while removing the corrupted files, which is a great result, >> considering the circumstances.=20 >=20 > Eli, could you post the relevant program here so others can use it if=20= > needed? There are requests from time to time, and it would be good if=20= > such a program were available (like I'm sure you'd been happy if it=20 > already existed the time you needed it). >=20 > Thanks, and wow: what an amazing filesystem can recover such an event! >=20 > --=20 > mit freundlichen Gr=FCssen, > Michael Monnerie, Ing. BSc >=20 > it-management Internet Services: Prot=E9ger > http://proteger.at [gesprochen: Prot-e-schee] > Tel: +43 660 / 415 6531 >=20 > // ****** Radiointerview zum Thema Spam ****** > // http://www.it-podcast.at/archiv.html#podcast-100716 > //=20 > // Haus zu verkaufen: http://zmi.at/langegg/ Good idea, here is the program: Eli #!/bin/bash #=20 # Copyright 2010 Eli Morris, Travis O'Brien, University of California=20= #=20 # remove_bad.sh is free software: you can redistribute it under the = terms # of the GNU General Public License as published by the Free Software # Foundation, either version 3 of the License, or (at your option) = any later # version.=20 #=20 # This program is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of = MERCHANTABILITY # or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public = License # for more details.=20 #=20 # You should have received a copy of the GNU General Public License = along # with this program. If not, see .=20 # # #remove_bad.sh: A script to determine whether any part of a file falls = within a #set of blocks (indicated by arguments 1 and 2). This script is #originally written with the intent to find files on a file system that #exist(ed) on a corrupt section of the file system. It generates a list = of files #that are potentially bad, so that they can be removed by another = script. # #Check command line arguments; grab arguments 1 and 2 if [ $# -eq 2 ]; then BAD_BLOCK_BEGINNING=3D$1 BAD_BLOCK_END=3D$2 echo "bad block beginning $BAD_BLOCK_BEGINNING" echo "bad block ending $BAD_BLOCK_END" #if there aren't exactly 2 arguments then print the usage to the user else echo "usage: remove_bad.sh beginning_block ending_block" exit fi remove file from last run if ( test -e "./naughty_list.txt")=20 then echo "removing the previous naughty list" rm "./naughty_list.txt" fi IFS=3D$'\n' #set the field separator to the carriage return character ALL_FILES=3D(`find /export/vol5 -type f`) #A list of all files on the = volume, SUBSTITUTE NAME OF YOUR VOLUME NUM_FILES=3D${#ALL_FILES[@]} #The number of files on the volume echo "number of files is $NUM_FILES" #Report the number of files to the = user # for each of the file in vol5 for (( COUNT=3D0; COUNT<$NUM_FILES; COUNT++)) do #Report which file is being worked on echo "file number: $COUNT is ${ALL_FILES[$COUNT]}" # report number of files to go FILES_TO_GO=3D$((NUM_FILES-COUNT)) echo "files left: $FILES_TO_GO"=20 #Run xfs_bmap to get the blocks that the file lives within OUTPUT=3D(`xfs_bmap ${ALL_FILES[$COUNT]}`) # output looks like this # vol5dump: # 0: [0..1053271]: 5200578944..5201632215 BAD_FILE=3D0 #Initialize the bad file flag NUM_LINES=3D${#OUTPUT[@]} #The number of lines from xfs_bmap # echo "number of lines for file: $NUM_LINES" #Report the number = of lines to the user #Loop through each line for (( LINE=3D1; LINE < $NUM_LINES; LINE++)) do # echo "line number $LINE: output: ${OUTPUT[$LINE]}" = #Report the current working line # get the block range from the line BLOCKS=3D`echo ${OUTPUT[$LINE]} | cut -d':' -f3` #Report the number of blocks occupied # echo "blocks after cut: '$BLOCKS'"=20 #Use cut to get the first and last block for the file FIRST_BLOCK=3D`echo $BLOCKS | cut -d'.' -f1`=20 LAST_BLOCK=3D`echo $BLOCKS | cut -d'.' -f3` =09 #Report these to the user # echo "beginning block: $FIRST_BLOCK" # echo "ending block: $LAST_BLOCK" #TODO: I'm not sure what exactly 'hole' means, but I get = the impression that it has something #to do with XFS's way of avoiding file fragmentation. = TAO if [ "$BLOCKS" !=3D " hole" ]; then #Don't deal with = lines that report 'hole' # compare to bad block region #For now, check whether the blocks for the file = fall within the user-given block range #if any of the blocks do, then mark this file as = bad. if ( (( "$BAD_BLOCK_BEGINNING" <=3D = "$FIRST_BLOCK")) && (( "$FIRST_BLOCK" <=3D "$BAD_BLOCK_END")) ); then # echo "hit first criterium" BAD_FILE=3D1 break elif ( (( "$BAD_BLOCK_BEGINNING" <=3D = "$LAST_BLOCK")) && (( "$LAST_BLOCK" <=3D "$BAD_BLOCK_END")) ); then # echo "hit second criterium" BAD_FILE=3D1 break fi fi done # add the file to the list of bad files if (($BAD_FILE =3D=3D 1)); then #Report to the user that the current file is bad echo "putting file: ${ALL_FILES[$COUNT]} on the naughty = list" #Write the file's name to the list echo "${ALL_FILES[$COUNT]}" >> naughty_list.txt fi done echo "program_ended_succesfully" >> naughty_list.txt --Apple-Mail-2--416424039 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=iso-8859-1
On Dienstag, 30. November 2010 Eli Morris = wrote:
Thanks for your help with this. I = wrote the program and ran it
through and it looks like we have we able to preserve 44 = TB of valid
data, while = removing the corrupted files, which is a great = result,
considering the = circumstances.

Eli, could you post the relevant = program here so others can use it if
needed? There are requests from = time to time, and it would be good if
such a program were available = (like I'm sure you'd been happy if it
already existed the time you = needed it).

Thanks, and wow: what an amazing filesystem can = recover such an event!

--
mit freundlichen = Gr=FCssen,
Michael Monnerie, Ing. BSc

it-management Internet = Services: Prot=E9ger
http://proteger.at [gesprochen: = Prot-e-schee]
Tel: +43 660 / 415 6531

// ****** Radiointerview = zum Thema Spam ******
// http://www.it= -podcast.at/archiv.html#podcast-100716
//
// Haus zu = verkaufen: http://zmi.at/langegg/


Good idea, here is the = program:

Eli

#!/bin/bash
#    Copyright = 2010 Eli Morris, Travis O'Brien, University of = California 
# 
#    remove_bad.sh is free software: you can = redistribute it under the  terms
#  =   of the GNU General Public License as published by the Free = Software
#    Foundation, = either version 3 of the License, or (at your option) any later
#    version. 
# 
#    = This program is distributed in the hope that it will be useful, = but
#    WITHOUT ANY = WARRANTY; without even the implied warranty of MERCHANTABILITY
#    or FITNESS FOR A PARTICULAR = PURPOSE.  See the GNU General Public License
#    for more details. 
# 
#    = You should have received a copy of the GNU General Public License = along
#    with this = program.  If not, see <http://www.gnu.org/licenses/>. 
#
#
#remove_bad.sh: A script to determine whether any part = of a file falls within a
#set of blocks = (indicated by arguments 1 and 2).  This script is
#originally written with the intent to find files on a = file system that
#exist(ed) on a corrupt = section of the file system.  It generates a list of files
#that are potentially bad, so that they can be removed = by another script.
#

#Check command = line arguments; grab arguments 1 and 2
if [ $# -eq 2 ]; = then
BAD_BLOCK_BEGINNING=3D$1
BAD_BLOCK_END=3D$2
echo "bad block beginning = $BAD_BLOCK_BEGINNING"
= echo "bad block ending $BAD_BLOCK_END"
#if there aren't exactly 2 arguments then print the = usage to the user
else
echo = "usage: remove_bad.sh beginning_block ending_block"
= exit
fi

remove file from last run
if ( test -e "./naughty_list.txt") 
= echo "removing the previous naughty list"
rm = "./naughty_list.txt"
fi

IFS=3D$'\n' #set the = field separator to the carriage return character
ALL_FILES=3D(`find /export/vol5 -type f`) #A list of all files on the volume, = SUBSTITUTE NAME OF YOUR VOLUME
NUM_FILES=3D${#ALL_FILES[@]} #The number = of files on the volume
echo "number of files is = $NUM_FILES" #Report the = number of files to the user

# for each of the file in vol5
for (( COUNT=3D0; COUNT<$NUM_FILES; COUNT++))
do
    #Report which file is = being worked on
= echo "file number: $COUNT is = ${ALL_FILES[$COUNT]}"

# report number of files = to go
= FILES_TO_GO=3D$((NUM_FILES-COUNT))
echo "files left: = $FILES_TO_GO" 

    #Run xfs_bmap to get the = blocks that the file lives within
OUTPUT=3D(`xfs_bmap = ${ALL_FILES[$COUNT]}`)
# = output looks like this
= # vol5dump:
# 0: [0..1053271]: = 5200578944..5201632215

BAD_FILE=3D0 = #Initialize the bad file flag
NUM_LINES=3D${#OUTPUT[@]} = #The number of lines from xfs_bmap

# = echo "number of lines for file: $NUM_LINES" #Report the number of lines = to the user
    #Loop through each = line
for (( LINE=3D1; = LINE < $NUM_LINES; LINE++))
do
= # echo "line number $LINE: output: ${OUTPUT[$LINE]}" = #Report the current working line

= # get the block range from the line
= BLOCKS=3D`echo ${OUTPUT[$LINE]} | cut -d':' -f3`

        = #Report the number of blocks occupied
= # echo "blocks after cut: '$BLOCKS'" 
      =   = #Use cut to get the first and last block for the = file
= FIRST_BLOCK=3D`echo $BLOCKS | cut -d'.' -f1` 
LAST_BLOCK=3D`echo = $BLOCKS | cut -d'.' -f3`

=

      =   = #Report these to the user
# echo "beginning = block: $FIRST_BLOCK"
= # echo "ending block: $LAST_BLOCK"

#TODO: I'm not = sure what exactly 'hole' means, but I get the impression that it has = something
= #to do with XFS's way of avoiding file fragmentation. = TAO
= if [ "$BLOCKS" !=3D = " hole" ]; then  #Don't deal with lines that = report 'hole'
= # compare to bad block region
= #For now, check whether the blocks for the file fall = within the user-given block range
#if any of = the blocks do, then mark this file as bad.
=   = if ( (( "$BAD_BLOCK_BEGINNING" <=3D "$FIRST_BLOCK")) && (( "$FIRST_BLOCK" <=3D "$BAD_BLOCK_END")) ); then
=   # echo "hit first = criterium"
  = BAD_FILE=3D1
=   break
=   = elif ( (( "$BAD_BLOCK_BEGINNING" <=3D "$LAST_BLOCK")) && (( "$LAST_BLOCK" <=3D "$BAD_BLOCK_END")) ); then
=   # echo "hit second = criterium"
  = BAD_FILE=3D1
=   break
=   = fi
= fi
= done
= # add the file to the list of bad files
if (($BAD_FILE =3D=3D 1)); then
                = #Report to the user that the current file is bad
= echo "putting file: ${ALL_FILES[$COUNT]} on the naughty = list"
                = #Write the file's name to the list
echo "${ALL_FILES[$COUNT]}" >> = naughty_list.txt
= fi
done
echo = "program_ended_succesfully" = >> naughty_list.txt
Umount -> run xfs_repair -> mount Mount fails -> try xfs_repair -> xfs_repair fails -> finally xfs_repair -L -> mount Adding above mount + xfs_repair procedure to script makes file system stable. But other member of my team do not agree as it increases mount time. On Fri, Dec 3, 2010 at 4:15 AM, Dave Chinner wrote: > On Thu, Dec 02, 2010 at 12:31:30PM +0530, Ajeet Yadav wrote: > > Dear all, > > This is XFS fail mount log on linux 2.6.30.9 > > > > XFS mounting filesystem sda2 > > Starting XFS recovery on filesystem: sda2 (logdev: internal) > > XFS internal error XFS_WANT_CORRUPTED_GOTO at line 1629 of file > > fs/xfs/xfs_alloc.c. Caller 0x80129658 > > Call Trace: > > [<802dedc8>] dump_stack+0x8/0x34 from[<80127400>] > > xfs_free_ag_extent+0x128/0x7ac > > [<80127400>] xfs_free_ag_extent+0x128/0x7ac from[<80129658>] > > xfs_free_extent+0xb8/0xe8 > > [<80129658>] xfs_free_extent+0xb8/0xe8 from[<80163978>] > > xlog_recover_process_efi+0x160/0x214 > > [<80163978>] xlog_recover_process_efi+0x160/0x214 from[<80163ac4>] > > xlog_recover_process_efis+0x98/0x11c > > [<80163ac4>] xlog_recover_process_efis+0x98/0x11c from[<8016663c>] > > xlog_recover_finish+0x28/0xdc > > [<8016663c>] xlog_recover_finish+0x28/0xdc from[<8016aec0>] > > xfs_mountfs+0x4d0/0x610 > > [<8016aec0>] xfs_mountfs+0x4d0/0x610 from[<80184434>] > > xfs_fs_fill_super+0x1fc/0x418 > > [<80184434>] xfs_fs_fill_super+0x1fc/0x418 from[<800bae48>] > > get_sb_bdev+0x11c/0x1c0 > > [<800bae48>] get_sb_bdev+0x11c/0x1c0 from[<80181f20>] > > xfs_fs_get_sb+0x20/0x2c > > [<80181f20>] xfs_fs_get_sb+0x20/0x2c from[<800b9424>] > > vfs_kern_mount+0x68/0xd0 > > [<800b9424>] vfs_kern_mount+0x68/0xd0 from[<800b94f0>] > > do_kern_mount+0x54/0x118 > > [<800b94f0>] do_kern_mount+0x54/0x118 from[<800d44e8>] > do_mount+0x7b4/0x828 > > [<800d44e8>] do_mount+0x7b4/0x828 from[<800d45f8>] sys_mount+0x9c/0x194 > > [<800d45f8>] sys_mount+0x9c/0x194 from[<800102c4>] stack_done+0x20/0x3c > > > > Failed to recover EFIs on filesystem: sda2 > > XFS: log mount finish failed > > You corrupted a free space btree. Care to tell uswhat test you were > running that caused this? Did you pull the plug on the device > during a copy again? > > Cheers, > > Dave. > -- > Dave Chinner > david@fromorbit.com > --0015175cded4cc681904968df599 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Our test case is automated:
1. Create large number of file of 6KB sizes = ( 6KB is taken, we wanted to increase journal load, and file size not in mu= ltiple of file system block size)
2. Set target to reboot at random sec= onds seconds.
3. Next boot do "ls" of all files in XFS partition.
4. Remove = all files in XFS.
5. Go back to step 1

The purpose of this test i= s to test journal and stability of XFS filestem.

Do you think, we sh= ould consider this test case ?

Other is when we should run xfs_repair ? because if mount fails and jou= rnal contain dirty logs then xfs_repair does not run, we are forced to use = (-L) option but its description say that (-L) can corrupt the file system.<= br>
Other case even if xfs mount successfully, even in that case accessing = some files give IO input/ output error.

1. I recommend the following= usage for xfs_repair so that we do not come accross these problem
=A0 = =A0 Mount Success -> Umount -> run xfs_repair -> mount
=A0 =A0 Mount fails -> try xfs_repair -> xfs_repair fails -> final= ly xfs_repair -L -> mount

Adding above mount + xfs_repair procedu= re to script makes file system stable. But other member of my team do not a= gree as it increases mount time.

=A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 =A0 =A0=A0 =A0

On Fri, Dec 3, 2= 010 at 4:15 AM, Dave Chinner <david@fromorbit.com> wrote:
<= div class=3D"h5">On Thu, Dec 02, 2010 at 12:31:30PM +0530, Ajeet Yadav wrot= e:
> Dear all,
> This is XFS fail mount log on linux 2.6.30.9
>
> XFS mounting filesystem sda2
> Starting XFS recovery on filesystem: sda2 (logdev: internal)
> XFS internal error XFS_WANT_CORRUPTED_GOTO at line 1629 of file
> fs/xfs/xfs_alloc.c. =A0Caller 0x80129658
> Call Trace:
> [<802dedc8>] dump_stack+0x8/0x34 from[<80127400>]
> xfs_free_ag_extent+0x128/0x7ac
> [<80127400>] xfs_free_ag_extent+0x128/0x7ac from[<80129658>= ;]
> xfs_free_extent+0xb8/0xe8
> [<80129658>] xfs_free_extent+0xb8/0xe8 from[<80163978>] > xlog_recover_process_efi+0x160/0x214
> [<80163978>] xlog_recover_process_efi+0x160/0x214 from[<80163= ac4>]
> xlog_recover_process_efis+0x98/0x11c
> [<80163ac4>] xlog_recover_process_efis+0x98/0x11c from[<80166= 63c>]
> xlog_recover_finish+0x28/0xdc
> [<8016663c>] xlog_recover_finish+0x28/0xdc from[<8016aec0>= ]
> xfs_mountfs+0x4d0/0x610
> [<8016aec0>] xfs_mountfs+0x4d0/0x610 from[<80184434>]
> xfs_fs_fill_super+0x1fc/0x418
> [<80184434>] xfs_fs_fill_super+0x1fc/0x418 from[<800bae48>= ]
> get_sb_bdev+0x11c/0x1c0
> [<800bae48>] get_sb_bdev+0x11c/0x1c0 from[<80181f20>]
> xfs_fs_get_sb+0x20/0x2c
> [<80181f20>] xfs_fs_get_sb+0x20/0x2c from[<800b9424>]
> vfs_kern_mount+0x68/0xd0
> [<800b9424>] vfs_kern_mount+0x68/0xd0 from[<800b94f0>]
> do_kern_mount+0x54/0x118
> [<800b94f0>] do_kern_mount+0x54/0x118 from[<800d44e8>] do_= mount+0x7b4/0x828
> [<800d44e8>] do_mount+0x7b4/0x828 from[<800d45f8>] sys_mou= nt+0x9c/0x194
> [<800d45f8>] sys_mount+0x9c/0x194 from[<800102c4>] stack_d= one+0x20/0x3c
>
> Failed to recover EFIs on filesystem: sda2
> XFS: log mount finish failed

You corrupted a free space btree. Care to tell uswhat test you = were
running that caused this? =A0Did you pull the plug on the device
during a copy again?

Cheers,

Dave.
--
Dave Chinner
david@fromorbit.com

--0015175cded4cc681904968df599-- From Martin@lichtvoll.de Sat Dec 4 04:28:40 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB4ASeKR146814 for ; Sat, 4 Dec 2010 04:28:40 -0600 X-ASG-Debug-ID: 1291458623-37f903e40000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.lichtvoll.de (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D355C1C95399 for ; Sat, 4 Dec 2010 02:30:23 -0800 (PST) Received: from mail.lichtvoll.de (mondschein.lichtvoll.de [194.150.191.11]) by cuda.sgi.com with ESMTP id LDMgRWJzaTBo1yFs for ; Sat, 04 Dec 2010 02:30:23 -0800 (PST) Received: from shambhala.localnet (ppp-93-104-153-33.dynamic.mnet-online.de [93.104.153.33]) by mail.lichtvoll.de (Postfix) with ESMTPSA id 08D22BA for ; Sat, 4 Dec 2010 11:30:22 +0100 (CET) From: Martin Steigerwald To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs_repair of critical volume Subject: Re: xfs_repair of critical volume Date: Sat, 4 Dec 2010 11:30:19 +0100 User-Agent: KMail/1.13.5 (Linux/2.6.37-rc3-tp42; KDE/4.5.3; i686; ; ) References: <75C248E3-2C99-426E-AE7D-9EC543726796@ucsc.edu> <201011121422.28993@zmi.at> <4CDDBC5C.7020708@hardwarefreak.com> (sfid-20101113_121516_584378_2321CE16) In-Reply-To: <4CDDBC5C.7020708@hardwarefreak.com> MIME-Version: 1.0 Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Message-Id: <201012041130.20344.Martin@lichtvoll.de> X-Barracuda-Connect: mondschein.lichtvoll.de[194.150.191.11] X-Barracuda-Start-Time: 1291458624 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48443 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Am Freitag 12 November 2010 schrieb Stan Hoeppner: > Michael Monnerie put forth on 11/12/2010 7:22 AM: > > I find the robustness of XFS amazing: You overwrote 1/5th of the disk > > with zeroes, and it still works :-) > > This isn't "robustness" Michael. If anything it's a serious problem. > XFS is reporting that hundreds or thousands of files that have been > physically removed still exist. Regardless of how he arrived at this > position, how is this "robust"? Most people would consider this > inconsistency of state a "corruption" situation, not "robustness". I think its necessary to differentiate here: 1) It appears to be robustness - or pure luck - regarding metadata consistency of the filesystem. I tend to believe its pure luck and that XFS just stored the metadata on the other RAID arrays. 2) XFS does not seem to have a way to detect whether file contents are still valid and consistent. It shares that with I think every other Linux filesystem instead BTRFS which uses checksumming for files. (Maybe NILFS as well, I don't know, and the FUSE or the other ZFS port). Ciao, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 From 3h8L6TBcKA5EA3xvDvHzwv6wF7D-89CzA6J19916z.x97I0D9DD.D13.x97@photos-server.bounces.google.com Sat Dec 4 16:35:12 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: **** X-Spam-Status: No, score=4.3 required=5.0 tests=BAYES_99,MIME_8BIT_HEADER, T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB4MZB4K234869 for ; Sat, 4 Dec 2010 16:35:11 -0600 X-ASG-Debug-ID: 1291502215-31b603d40000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-gx0-f201.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 5098614143CA for ; Sat, 4 Dec 2010 14:36:55 -0800 (PST) Received: from mail-gx0-f201.google.com (mail-gx0-f201.google.com [209.85.161.201]) by 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s+MkfKvBP8I9KojwP4cW9gvB4f0sXcHl+VOLKPzI9gATa23I2hVAx0wMdKOV2sH1eoocl09f0Svt v19XvfU5f4d65favfWd9qyXS3Gs2Mt/Yq13ujitg8Z8poUAQFfOj2yHfI67ixj4jHodUrDQ9N0q5 u7iy0+1s7i7fzLmW3hVHmbJO5yBljlmOT6n1q7VxTSszpw9OdKnyzd33/r+unmFFFFUdQUUUUAFF FFABRRRQAUUUUAFFFFAH/9k= --0016364c5d15c4385004969d4af6-- From stan@hardwarefreak.com Sat Dec 4 22:48:04 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB54m4tx033800 for ; Sat, 4 Dec 2010 22:48:04 -0600 X-ASG-Debug-ID: 1291524566-5bd5026b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A13D31DB6B2D for ; Sat, 4 Dec 2010 20:49:26 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id MvkYblPvNLbb9WWS for ; Sat, 04 Dec 2010 20:49:26 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 770C36C161 for ; Sat, 4 Dec 2010 22:49:25 -0600 (CST) Message-ID: <4CFB19D5.7010301@hardwarefreak.com> Date: Sat, 04 Dec 2010 22:49:25 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs_repair of critical volume Subject: Re: xfs_repair of critical volume References: <75C248E3-2C99-426E-AE7D-9EC543726796@ucsc.edu> <201011121422.28993@zmi.at> <4CDDBC5C.7020708@hardwarefreak.com> (sfid-20101113_121516_584378_2321CE16) <201012041130.20344.Martin@lichtvoll.de> In-Reply-To: <201012041130.20344.Martin@lichtvoll.de> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1291524566 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.42 X-Barracuda-Spam-Status: No, SCORE=-1.42 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48516 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Martin Steigerwald put forth on 12/4/2010 4:30 AM: > Am Freitag 12 November 2010 schrieb Stan Hoeppner: >> Michael Monnerie put forth on 11/12/2010 7:22 AM: >>> I find the robustness of XFS amazing: You overwrote 1/5th of the disk >>> with zeroes, and it still works :-) >> >> This isn't "robustness" Michael. If anything it's a serious problem. >> XFS is reporting that hundreds or thousands of files that have been >> physically removed still exist. Regardless of how he arrived at this >> position, how is this "robust"? Most people would consider this >> inconsistency of state a "corruption" situation, not "robustness". > > I think its necessary to differentiate here: > > 1) It appears to be robustness - or pure luck - regarding metadata > consistency of the filesystem. I tend to believe its pure luck and that XFS > just stored the metadata on the other RAID arrays. > > 2) XFS does not seem to have a way to detect whether file contents are > still valid and consistent. It shares that with I think every other Linux > filesystem instead BTRFS which uses checksumming for files. (Maybe NILFS as > well, I don't know, and the FUSE or the other ZFS port). After re-reading my own words above again, I feel I a need to clarify something: I took exception merely to the description of "robustness" being used in this situation. I was not and am not being derogatory of XFS in any way. I love XFS. Of all available filesystems (on any OS) I feel it is the best. That's why I use it. :) In this scenario, other filesystems may have left the OP empty handed. So, I guess XFS deserves deserves a positive attribution for this. But, again, I don't think "robustness" is the correct attribution here. -- Stan From roger@filmlight.ltd.uk Sun Dec 5 03:43:21 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB59hK9R065211 for ; Sun, 5 Dec 2010 03:43:21 -0600 X-ASG-Debug-ID: 1291542305-690801f80000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from a.mx.filmlight.ltd.uk (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with SMTP id A3B931DB7045 for ; Sun, 5 Dec 2010 01:45:05 -0800 (PST) Received: from a.mx.filmlight.ltd.uk (a.mx.filmlight.ltd.uk [77.107.81.250]) by cuda.sgi.com with SMTP id NkjptsbVyKdMLHEs for ; Sun, 05 Dec 2010 01:45:05 -0800 (PST) Received: (dqd 6921 invoked from network); 5 Dec 2010 09:45:00 -0000 Received: from 50c553bc.flatrate.dk (HELO ?192.168.2.36?) (roger@80.197.83.188) by a.mx.filmlight.ltd.uk with SMTP; 5 Dec 2010 09:45:00 -0000 X-ASG-Orig-Subj: Re: xfs_repair of critical volume Subject: Re: xfs_repair of critical volume Mime-Version: 1.0 (Apple Message framework v1081) Content-Type: text/plain; charset=us-ascii From: Roger Willcocks In-Reply-To: <4CFB19D5.7010301@hardwarefreak.com> Date: Sun, 5 Dec 2010 09:44:59 +0000 Cc: xfs@oss.sgi.com Content-Transfer-Encoding: quoted-printable Message-Id: References: <75C248E3-2C99-426E-AE7D-9EC543726796@ucsc.edu> <201011121422.28993@zmi.at> <4CDDBC5C.7020708@hardwarefreak.com> (sfid-20101113_121516_584378_2321CE16) <201012041130.20344.Martin@lichtvoll.de> <4CFB19D5.7010301@hardwarefreak.com> To: Stan Hoeppner X-Mailer: Apple Mail (2.1081) X-Barracuda-Connect: a.mx.filmlight.ltd.uk[77.107.81.250] X-Barracuda-Start-Time: 1291542306 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48534 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 5 Dec 2010, at 04:49, Stan Hoeppner wrote: > Martin Steigerwald put forth on 12/4/2010 4:30 AM: >> Am Freitag 12 November 2010 schrieb Stan Hoeppner: >>> Michael Monnerie put forth on 11/12/2010 7:22 AM: >>>> I find the robustness of XFS amazing: You overwrote 1/5th of the = disk >>>> with zeroes, and it still works :-) >>>=20 >>> This isn't "robustness" Michael. If anything it's a serious = problem. >>> XFS is reporting that hundreds or thousands of files that have been >>> physically removed still exist. Regardless of how he arrived at = this >>> position, how is this "robust"? Most people would consider this >>> inconsistency of state a "corruption" situation, not "robustness". >>=20 >> I think its necessary to differentiate here: >>=20 >> 1) It appears to be robustness - or pure luck - regarding metadata=20 >> consistency of the filesystem. I tend to believe its pure luck and = that XFS=20 >> just stored the metadata on the other RAID arrays. >>=20 >> 2) XFS does not seem to have a way to detect whether file contents = are=20 >> still valid and consistent. It shares that with I think every other = Linux=20 >> filesystem instead BTRFS which uses checksumming for files. (Maybe = NILFS as=20 >> well, I don't know, and the FUSE or the other ZFS port). >=20 > After re-reading my own words above again, I feel I a need to clarify > something: I took exception merely to the description of "robustness" > being used in this situation. I was not and am not being derogatory = of > XFS in any way. I love XFS. Of all available filesystems (on any OS) = I > feel it is the best. That's why I use it. :) >=20 > In this scenario, other filesystems may have left the OP empty handed. > So, I guess XFS deserves deserves a positive attribution for this. = But, > again, I don't think "robustness" is the correct attribution here. I think 'lucky' is probably a more appropriate term. The chances are = that due to the size of the array, all the inodes and the inline extent = lists were on the first volume. If' he'd lost that instead, everything = would be gone. -- Roger From 3kwn8TBcKA-UWPJHZHdLIHSIbTZ-UVYLWSfNVVNSL.JVTeMZVZZ.ZNP.JVT@photos-server.bounces.google.com Sun Dec 5 15:50:35 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: **** X-Spam-Status: No, score=4.3 required=5.0 tests=BAYES_99,MIME_8BIT_HEADER, T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB5LoYab147153 for ; Sun, 5 Dec 2010 15:50:35 -0600 X-ASG-Debug-ID: 1291585939-387103960000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-vw0-f73.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 71CD71C980DC for ; Sun, 5 Dec 2010 13:52:19 -0800 (PST) Received: from mail-vw0-f73.google.com (mail-vw0-f73.google.com [209.85.212.73]) by cuda.sgi.com with ESMTP id rgpocFMC4DM4rKbt for ; Sun, 05 Dec 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X-ASG-Whitelist: Barracuda Reputation Received: from mail05.corp.redhat.com (zmail05.collab.prod.int.phx2.redhat.com [10.5.5.46]) by mx3-phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oB61ekNl002750; Sun, 5 Dec 2010 20:40:46 -0500 Date: Sun, 5 Dec 2010 20:40:46 -0500 (EST) From: Lachlan McIlroy Reply-To: Lachlan McIlroy To: Dave Chinner Cc: xfs@oss.sgi.com Message-ID: <1860606102.27381291599646249.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> In-Reply-To: <2033621546.27171291599487418.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> X-ASG-Orig-Subj: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Subject: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [10.5.5.71] X-Mailer: Zimbra 5.0.21_GA_3150.RHEL4_64 (ZimbraWebClient - FF3.0 (Linux)/5.0.21_GA_3150.RHEL4_64) X-Barracuda-Connect: mx3-phx2.redhat.com[209.132.183.24] X-Barracuda-Start-Time: 1291599658 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean ----- "Dave Chinner" wrote: > On Thu, Dec 02, 2010 at 10:51:32PM -0500, Lachlan McIlroy wrote: > > Dave, overall it looks good - just a few minor points below. > > Thanks for doing this. > > > > ----- "Dave Chinner" wrote: > > [snip] > > > > -void > > > -cmn_err(register int level, char *fmt, ...) > > > -{ > > > - char *fp = fmt; > > > - int len; > > > - ulong flags; > > > - va_list ap; > > > - > > > - level &= XFS_ERR_MASK; > > > - if (level > XFS_MAX_ERR_LEVEL) > > > - level = XFS_MAX_ERR_LEVEL; > > > - spin_lock_irqsave(&xfs_err_lock,flags); > > > - va_start(ap, fmt); > > > - if (*fmt == '!') fp++; > > > - len = vsnprintf(message, sizeof(message), fp, ap); > > > - if (len >= sizeof(message)) > > > - len = sizeof(message) - 1; > > > - if (message[len-1] == '\n') > > > - message[len-1] = 0; > ^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > > > - printk("%s%s\n", err_level[level], message); > > > - va_end(ap); > > > - spin_unlock_irqrestore(&xfs_err_lock,flags); > > > - BUG_ON(level == CE_PANIC); > > > -} > > [snip] > > > > +#define CE_DEBUG KERN_DEBUG > > > +#define CE_CONT KERN_INFO > > > +#define CE_NOTE KERN_NOTICE > > > +#define CE_WARN KERN_WARNING > > > +#define CE_ALERT KERN_ALERT > > > +#define CE_PANIC KERN_EMERG > > > + > > > +#define cmn_err(lvl, fmt, args...) \ > > > + do { \ > > > + printk(lvl fmt, ## args); \ > > > > The old cmn_err() routine would append a newline if one was not > supplied. > > As far as I know printk() will not do the same so either we need to > fix > > all calls to cmn_err() to supply a '\n' or add it here (at the risk > of > > having two newlines) - maybe: > > See above - I think you have it the wrong way around - it looks to > me like the old cmn_err() stripped the newline character if it > existed, then added one itself. That's the same thing - the input may or may not have a newline but the output always will. We should at least try to maintain that behaviour. > > > printk(lvl fmt "\n", ## args); > > printk() is actually pretty tolerant of missing newlines - if it > detects the previous printk() was not newline terminated and the > next one starts with a log level that is not KERN_CONT, it will > print the new message on a new line automatically. This is the code > in vprintk() that handles it: > > /* Do we have a loglevel in the string? */ > if (p[0] == '<') { > unsigned char c = p[1]; > if (c && p[2] == '>') { > switch (c) { > case '0' ... '7': /* loglevel */ > current_log_level = c - '0'; > /* Fallthrough - make sure we're on a new line > */ > case 'd': /* KERN_DEFAULT */ > if (!new_text_line) { > emit_log_char('\n'); > new_text_line = 1; > } > /* Fallthrough - skip the loglevel */ > case 'c': /* KERN_CONT */ > p += 3; > break; > } > } > } > > So we are probably OK not to need additional newlines. Indeed, I > didn't notice the output being screwed up without them. ;) What if the next message after a cmn_err() message doesn't have a log level? There are many users of printk() that don't specify a log level so it could potentially be joined with the previous message. (BTW that code above is not in rhel5). > > I can add them if you want, though. I think we should add them. > > > > > > + BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); \ > > > + } while (0) > > > + > > > +#define xfs_fs_cmn_err(lvl, mp, fmt, args...) \ > > > + do { \ > > > + printk(lvl "Filesystem %s: " fmt, (mp)->m_fsname, ## args); \ > > > > printk(lvl "Filesystem %s: " fmt "\n", (mp)->m_fsname, ## args); > > > > > + BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); \ > > > + } while (0) > > > + > > > +/* All callers to xfs_cmn_err use CE_ALERT, so don't bother > testing > > > lvl */ > > > +#define xfs_cmn_err(panic_tag, lvl, mp, fmt, args...) \ > > > + do { \ > > > + int panic = 0; \ > > > + if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) { \ > > > + printk(KERN_ALERT "XFS: Transforming an alert into a BUG."); > \ > > > + panic = 1; \ > > > + } \ > > > + printk(KERN_ALERT "Filesystem %s: " fmt, (mp)->m_fsname, ## > args); > > > \ > > > + BUG_ON(panic); \ > > > + } while (0) > > > > I think we can simplify this case a bit and remove the panic > variable, > > like this: > > > > do { \ > > printk(KERN_ALERT "Filesystem %s: " fmt "\n", (mp)->m_fsname, ## > args); > > if (xfs_panic_mask && (xfs_panic_mask & panic_tag)) { \ > > printk(KERN_ALERT "XFS: Transforming an alert into a BUG.\n"); \ > > BUG_ON(1); \ > > } \ > > } while (0) > > > > This also reorders the messages which I think makes more sense. > > Definitely. That's a vast improvement. ;) > > Cheers, > > Dave. > -- > Dave Chinner > david@fromorbit.com > > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs From SRS0+fHnJ+9+fromorbit.com=david@internode.on.net Sun Dec 5 22:08:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB648ErI186491 for ; Sun, 5 Dec 2010 22:08:15 -0600 X-ASG-Debug-ID: 1291608598-243901750000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 6908D1C98E06 for ; Sun, 5 Dec 2010 20:09:58 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id CdxUFzBvYCWGMECE for ; Sun, 05 Dec 2010 20:09:58 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48617300-1927428 for multiple; Mon, 06 Dec 2010 14:39:42 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PPSOS-0004Dx-I6; Mon, 06 Dec 2010 15:09:40 +1100 Date: Mon, 6 Dec 2010 15:09:40 +1100 From: Dave Chinner To: Spelic Cc: "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, linux-lvm@redhat.com X-ASG-Orig-Subj: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Subject: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram Message-ID: <20101206040940.GA16103@dastard> References: <4CF7A539.1050206@shiftmail.org> <4CF7A9CF.2020904@shiftmail.org> <20101202230743.GZ16922@dastard> <4CF8F9BE.6000604@shiftmail.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4CF8F9BE.6000604@shiftmail.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail18.adl2.internode.on.net[150.101.137.103] X-Barracuda-Start-Time: 1291608600 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48600 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, Dec 03, 2010 at 03:07:58PM +0100, Spelic wrote: > On 12/03/2010 12:07 AM, Dave Chinner wrote: > >This is a classic ENOSPC vs NFS client writeback overcommit caching > >issue. Have a look at the block map output - I bet theres holes in > >the file and it's only consuming 1.5GB of disk space. use xfs_bmap > >to check this. du should tell you the same thing. > > > > Yes you are right! .... > root@server:/mnt/ram# xfs_bmap zerofile > zerofile: .... > 30: [3473240..3485567]: 2265328..2277655 > 31: [3485568..3632983]: hole > 32: [3632984..3645311]: 2277656..2289983 > 33: [3645312..3866455]: hole > 34: [3866456..3878783]: 2289984..2302311 > > (many delayed allocation extents cannot be filled because space on > device is finished) > > However ... > > > >Basically, the NFS client overcommits the server filesystem space by > >doing local writeback caching. Hence it caches 1.9GB of data before > >it gets the first ENOSPC error back from the server at around 1.5GB > >of written data. At that point, the data that gets ENOSPC errors is > >tossed by the NFS client, and a ENOSPC error is placed on the > >address space to be reported to the next write/sync call. That gets > >to the dd process when it's 1.9GB into the write. > > I'm no great expert but isn't this a design flaw in NFS? Yes, sure is. [ Well, to be precise the original NFSv2 specification didn't have this flaw because all writes were synchronous. NFSv3 introduced asynchronous writes (writeback caching) and with it this problem. NFSv4 does not fix this flaw. ] > Ok in this case we were lucky it was all zeroes so XFS made a sparse > file and could fit a 1.9GB into 1.5GB device size. > > In general with nonzero data it seems to me you will get data > corruption because the NFS client thinks it has written the data > while the NFS server really can't write more data than the device > size. Yup, well known issue. Simple rule: don't run your NFS server out of space. > It's nice that the NFS server does local writeback caching but it > should also cache the filesystem's free space (and check it > periodically, since nfs-server is presumably not the only process > writing in that filesystem) so that it doesn't accept more data than > it can really write. Alternatively, when free space drops below 1GB > (or a reasonable size based on network speed), nfs-server should > turn off filesystem writeback caching. This isn't a NFS server problem, or one that canbe worked around at the server. it's a NFS _client_ problem in that it does not get synchronous ENOSPC errors when using writeback caching. There is no way for the NFS client to know the server is near ENOSPC conditions prior to writing the data to the server as clients operate independently. If you really want your NFS clients to behave correctly when the server goes ENOSPC, turn off writeback caching at the client side, not the server (i.e. use sync mounts on the client side). Write performance will suck, but if you want sane ENOSPC behaviour... ..... > Holes in a random file! > This is data corruption, and nobody is notified of this data > corruption: no error at client side or server side! > Is it good semantics? How could client get notified of this? Some > kind of fsync maybe? Use wireshark to determine if the server sends an ENOSPC to the client when the first background write fails. I bet it does and that your dd write failed with ENOSPC, too. Something stopped it writing at 1.9GB.... What happens to the remaining cached writeback data in the NFS client once the server runs out of space is NFS client specific behaviour. If you end up with only bits of the file on the server, ending up on the server, then that's a result of NFS client behaviour, not a NFS server problem. Cheers, Dave. -- Dave Chinner david@fromorbit.com From lczerner@redhat.com Mon Dec 6 04:18:58 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.4 required=5.0 tests=BAYES_00,J_CHICKENPOX_43, J_CHICKENPOX_44,J_CHICKENPOX_64,J_CHICKENPOX_66,J_CHICKENPOX_73 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB6AIwUj228103 for ; Mon, 6 Dec 2010 04:18:58 -0600 X-ASG-Debug-ID: 1291630844-1b1a02be0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1689D1C9876B for ; Mon, 6 Dec 2010 02:20:44 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id 0LZDVRkFeaPSlfd2 for ; Mon, 06 Dec 2010 02:20:44 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oB6AKY2M000619 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Mon, 6 Dec 2010 05:20:34 -0500 Received: from dhcp-lab-213.englab.brq.redhat.com (dhcp-27-109.brq.redhat.com [10.34.27.109]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id oB6AKWO4015641 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Mon, 6 Dec 2010 05:20:33 -0500 Date: Mon, 6 Dec 2010 11:20:31 +0100 (CET) From: Lukas Czerner X-X-Sender: lukas@dhcp-lab-213.englab.brq.redhat.com To: Lukas Czerner cc: xfs@oss.sgi.com, esandeen@redhat.com, hch@infradead.org X-ASG-Orig-Subj: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Subject: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation In-Reply-To: <1290780743-12112-1-git-send-email-lczerner@redhat.com> Message-ID: References: <1290780743-12112-1-git-send-email-lczerner@redhat.com> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291630845 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, 26 Nov 2010, Lukas Czerner wrote: > FITRIM ioctl is used on a mounted filesystem to discard (or "trim") > blocks which are not in use by the filesystem. This is useful for > solid-state drives (SSDs) and thinly-provi-sioned storage. This test > helps to verify filesystem FITRIM implementation to assure that it > does not corrupts data. > > This test creates checksums of all files in /usr/share/doc directory and > run several processes which clear its working directory on SCRATCH_MNT, > then copy everything from /usr/share/doc into its working directory, create > list of files in working directory and its checksums and compare it with the > original list of checksums. Every process works in the loop so it repeat > remove->copy->check, while fstrim tool is running simultaneously. > > Fstrim is just a helper tool which uses FITRIM ioctl to actually do the > filesystem discard. > > I found this very useful because when the FITRIM is really buggy (thus > data-destroying) the 248 test will notice, because checksums will most > likely change. Hello, what is the status of this patch ? It would be nice to get some response before someone add a new test and the patch becomes obsolete :). Thanks! -Lukas > > Signed-off-by: Lukas Czerner > --- > 248 | 163 +++++++++++++++++++++++++++++++++++++ > 248.out | 3 + > group | 1 + > src/Makefile | 2 +- > src/fstrim.c | 257 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > 5 files changed, 425 insertions(+), 1 deletions(-) > create mode 100755 248 > create mode 100644 248.out > create mode 100644 src/fstrim.c > > diff --git a/248 b/248 > new file mode 100755 > index 0000000..0d2f17f > --- /dev/null > +++ b/248 > @@ -0,0 +1,163 @@ > +#!/bin/bash > +# FS QA Test No. 248 > +# > +# This test was created in order to verify filesystem FITRIM implementation. > +# By many concurrent copy and remove operations and checking that files > +# does not change after copied into SCRATCH_MNT test if FITIM implementation > +# corrupts the filesystem (data/metadata). > +# > +#----------------------------------------------------------------------- > +# Copyright 2010 (C) Red Hat, Inc., Lukas Czerner > +# > +# This program is free software; you can redistribute it and/or > +# modify it under the terms of the GNU General Public License as > +# published by the Free Software Foundation. > +# > +# This program is distributed in the hope that it would be useful, > +# but WITHOUT ANY WARRANTY; without even the implied warranty of > +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > +# GNU General Public License for more details. > +# > +# You should have received a copy of the GNU General Public License > +# along with this program; if not, write the Free Software Foundation, > +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA > +#----------------------------------------------------------------------- > + > +owner=lczerner@redhat.com > + > +seq=`basename $0` > +echo "QA output created by $seq" > + > +here=`pwd` > +tmp=`mktemp -d` > +status=1 # failure is the default! > +trap "_cleanup; exit \$status" 0 1 3 > +trap "_destroy; exit \$status" 2 15 > +chpid=0 > +mypid=$$ > + > +# get standard environment, filters and checks > +. ./common.rc > +. ./common.filter > + > +# real QA test starts here > +_supported_fs generic > +_supported_os Linux > +_require_scratch > +_scratch_mkfs >/dev/null 2>&1 > +_scratch_mount > + > +_cleanup() > +{ > + rm -rf $tmp > +} > + > +_destroy() > +{ > + kill $pids $fstrim_pid > + wait $pids $fstrim_pid > + rm -rf $tmp > +} > + > +_destroy_fstrim() > +{ > + kill $fpid > + wait $fpid > +} > + > +fstrim_loop() > +{ > + trap "_destroy_fstrim; exit \$status" 2 15 > + fsize=$(df | grep $SCRATCH_MNT | grep $SCRATCH_DEV | awk '{print $2}') > + > + while true ; do > + step=1048576 > + start=0 > + $here/src/fstrim $SCRATCH_MNT & > + fpid=$! > + wait $fpid > + while [ $start -lt $fsize ] ; do > + $here/src/fstrim -s ${start}k -l ${step}k $SCRATCH_MNT & > + fpid=$! > + wait $fpid > + start=$(( $start + $step )) > + done > + done > +} > + > +function check_sums() { > + dir=$1 > + > + ( > + cd $SCRATCH_MNT/$p > + find -P . -xdev -type f -print0 | xargs -0 md5sum | sort -o $tmp/stress.$$.$p > + ) > + > + diff $tmp/content.sums $tmp/stress.$$.$p > + if [ $? -ne 0 ]; then > + echo "!!!Checksums has changed - Filesystem possibly corrupted!!!\n" > + kill $mypid > + fi > + rm -f $tmp/stress.$$.$p > +} > + > +function run_process() { > + local p=$1 > + repeat=10 > + > + sleep $((5*$p))s & > + export chpid=$! && wait $chpid &> /dev/null > + chpid=0 > + > + while [ $repeat -gt 0 ]; do > + > + # Remove old directories. > + rm -rf $SCRATCH_MNT/$p > + export chpid=$! && wait $chpid &> /dev/null > + > + # Copy content -> partition. > + mkdir $SCRATCH_MNT/$p > + cp -ax $content/* $SCRATCH_MNT/$p > + export chpid=$! && wait $chpid &> /dev/null > + > + check_sums > + repeat=$(( $repeat - 1 )) > + done > +} > + > +nproc=20 > +content=/usr/share/doc > + > +# Check for FITRIM support > +echo -n "Checking FITRIM support: " > +$here/src/fstrim -l 10M $SCRATCH_MNT > +[ $? -ne 0 ] && exit > +echo "done." > + > +mkdir -p $tmp > + > +( > +cd $content > +find -P . -xdev -type f -print0 | xargs -0 md5sum | sort -o $tmp/content.sums > +) > + > +echo -n "Running the test: " > +pids="" > +fstrim_loop & > +fstrim_pid=$! > +p=1 > +while [ $p -le $nproc ]; do > + run_process $p & > + pids="$pids $!" > + p=$(($p+1)) > +done > +echo "done." > + > +wait $pids > +kill $fstrim_pid > +wait $fstrim_pid > + > +status=0 > +_check_scratch_fs > + > +exit > diff --git a/248.out b/248.out > new file mode 100644 > index 0000000..880d9c7 > --- /dev/null > +++ b/248.out > @@ -0,0 +1,3 @@ > +QA output created by 248 > +Checking FITRIM support: done. > +Running the test: done. > diff --git a/group b/group > index 0f94dd9..fea84ed 100644 > --- a/group > +++ b/group > @@ -361,3 +361,4 @@ deprecated > 245 auto quick dir > 246 auto quick rw > 247 auto quick rw > +248 ioctl > diff --git a/src/Makefile b/src/Makefile > index b827bd0..885fd65 100644 > --- a/src/Makefile > +++ b/src/Makefile > @@ -17,7 +17,7 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ > preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \ > locktest unwritten_mmap bulkstat_unlink_test t_stripealign \ > bulkstat_unlink_test_modified t_dir_offset t_futimens t_immutable \ > - stale_handle > + stale_handle fstrim > > SUBDIRS = > > diff --git a/src/fstrim.c b/src/fstrim.c > new file mode 100644 > index 0000000..6686c99 > --- /dev/null > +++ b/src/fstrim.c > @@ -0,0 +1,257 @@ > +/* > + * fstrim.c -- discard the part (or whole) of mounted filesystem. > + * > + * Copyright (C) 2009 Red Hat, Inc., Lukas Czerner > + * > + * This program is free software: you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation, either version 2 of the License, or > + * (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program. If not, see . > + * > + * This program uses FITRIM ioctl to discard parts or the whole filesystem > + * online (mounted). You can specify range (start and lenght) to be > + * discarded, or simply discard while filesystem. > + * > + * Usage: fstrim [options] > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include > +#include > +#include > + > +#ifndef FITRIM > +struct fstrim_range { > + uint64_t start; > + uint64_t len; > + uint64_t minlen; > +}; > +#define FITRIM _IOWR('X', 121, struct fstrim_range) > +#endif > + > +const char *program_name = "fstrim"; > + > +struct options { > + struct fstrim_range *range; > + char mpoint[PATH_MAX]; > + char verbose; > +}; > + > +static void usage(void) > +{ > + fprintf(stderr, > + "Usage: %s [-s start] [-l length] [-m minimum-extent]" > + " [-v] {mountpoint}\n\t" > + "-s Starting Byte to discard from\n\t" > + "-l Number of Bytes to discard from the start\n\t" > + "-m Minimum extent length to discard\n\t" > + "-v Verbose - number of discarded bytes\n", > + program_name); > +} > + > +static void err_exit(const char *fmt, ...) > +{ > + va_list pvar; > + va_start(pvar, fmt); > + vfprintf(stderr, fmt, pvar); > + va_end(pvar); > + usage(); > + exit(EXIT_FAILURE); > +} > + > +/** > + * Get the number from argument. It can be number followed by > + * units: k|K, m|M, g|G, t|T > + */ > +static unsigned long long get_number(char **optarg) > +{ > + char *opt, *end; > + unsigned long long number, max; > + > + /* get the max to avoid overflow */ > + max = ULLONG_MAX / 1024; > + number = 0; > + opt = *optarg; > + > + if (*opt == '-') { > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + } > + > + errno = 0; > + number = strtoul(opt, &end , 0); > + if (errno) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(errno), *optarg); > + > + /* > + * Convert units to numbers. Fall-through stack is used for units > + * so absence of breaks is intentional. > + */ > + switch (*end) { > + case 'T': /* terabytes */ > + case 't': > + if (number > max) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + number *= 1024; > + case 'G': /* gigabytes */ > + case 'g': > + if (number > max) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + number *= 1024; > + case 'M': /* megabytes */ > + case 'm': > + if (number > max) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + number *= 1024; > + case 'K': /* kilobytes */ > + case 'k': > + if (number > max) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + number *= 1024; > + end++; > + case '\0': /* end of the string */ > + break; > + default: > + err_exit("%s: %s (%s)\n", program_name, > + strerror(EINVAL), *optarg); > + return 0; > + } > + > + if (*end != '\0') { > + err_exit("%s: %s (%s)\n", program_name, > + strerror(EINVAL), *optarg); > + } > + > + return number; > +} > + > +static int parse_opts(int argc, char **argv, struct options *opts) > +{ > + int c; > + > + while ((c = getopt(argc, argv, "s:l:m:v")) != EOF) { > + switch (c) { > + case 's': /* starting point */ > + opts->range->start = get_number(&optarg); > + break; > + case 'l': /* length */ > + opts->range->len = get_number(&optarg); > + break; > + case 'm': /* minlen */ > + opts->range->minlen = get_number(&optarg); > + break; > + case 'v': /* verbose */ > + opts->verbose = 1; > + break; > + default: > + return EXIT_FAILURE; > + } > + } > + > + return 0; > +} > + > +int main(int argc, char **argv) > +{ > + struct options *opts; > + struct stat sb; > + int fd, err = 0, ret = EXIT_FAILURE; > + > + opts = malloc(sizeof(struct options)); > + if (!opts) > + err_exit("%s: malloc(): %s\n", program_name, strerror(errno)); > + > + opts->range = NULL; > + opts->verbose = 0; > + > + if (argc > 1) > + strncpy(opts->mpoint, argv[argc - 1], sizeof(opts->mpoint)); > + > + opts->range = calloc(1, sizeof(struct fstrim_range)); > + if (!opts->range) { > + fprintf(stderr, "%s: calloc(): %s\n", program_name, > + strerror(errno)); > + goto free_opts; > + } > + > + opts->range->len = ULLONG_MAX; > + > + if (argc > 2) > + err = parse_opts(argc, argv, opts); > + > + if (err) { > + usage(); > + goto free_opts; > + } > + > + if (strnlen(opts->mpoint, 1) < 1) { > + fprintf(stderr, "%s: You have to specify mount point.\n", > + program_name); > + usage(); > + goto free_opts; > + } > + > + if (stat(opts->mpoint, &sb) == -1) { > + fprintf(stderr, "%s: %s: %s\n", program_name, > + opts->mpoint, strerror(errno)); > + usage(); > + goto free_opts; > + } > + > + if (!S_ISDIR(sb.st_mode)) { > + fprintf(stderr, "%s: %s: (%s)\n", program_name, > + opts->mpoint, strerror(ENOTDIR)); > + usage(); > + goto free_opts; > + } > + > + fd = open(opts->mpoint, O_RDONLY); > + if (fd < 0) { > + fprintf(stderr, "%s: open(%s): %s\n", program_name, > + opts->mpoint, strerror(errno)); > + goto free_opts; > + } > + > + if (ioctl(fd, FITRIM, opts->range)) { > + fprintf(stderr, "%s: FSTRIM: %s\n", program_name, > + strerror(errno)); > + goto free_opts; > + } > + > + if ((opts->verbose) && (opts->range)) > + fprintf(stdout, "%llu Bytes was trimmed\n", opts->range->len); > + > + ret = EXIT_SUCCESS; > + > +free_opts: > + if (opts) { > + if (opts->range) > + free(opts->range); > + free(opts); > + } > + > + return ret; > +} > -- From spelic@shiftmail.org Mon Dec 6 06:19:26 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_43, J_CHICKENPOX_45 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB6CJQZi239796 for ; Mon, 6 Dec 2010 06:19:26 -0600 X-ASG-Debug-ID: 1291638071-568101090000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx2.isti.cnr.it (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id ADAC51C9397 for ; Mon, 6 Dec 2010 04:21:11 -0800 (PST) Received: from mx2.isti.cnr.it (mx2.isti.cnr.it [194.119.192.4]) by cuda.sgi.com with ESMTP id N6wdpLr4AeKLLJZB for ; Mon, 06 Dec 2010 04:21:11 -0800 (PST) Received: from SCRIPT-SPFWL-DAEMON.mx.isti.cnr.it by mx.isti.cnr.it (PMDF V6.5 #31825) id <01NV3O6KBVIOLS8X2Z@mx.isti.cnr.it> for xfs@oss.sgi.com; Mon, 06 Dec 2010 13:20:00 +0100 (MET) Received: from conversionlocal.isti.cnr.it by mx.isti.cnr.it (PMDF V6.5 #31825) id <01NV3O6JBJIOLVX0OJ@mx.isti.cnr.it> for xfs@oss.sgi.com; Mon, 06 Dec 2010 13:19:55 +0100 (MET) Received: from [10.0.0.61] (dynamic-adsl-84-220-171-138.clienti.tiscali.it [84.220.171.138]) by mx.isti.cnr.it (PMDF V6.5 #31826) with ESMTPSA id <01NV3O6IFH12LZNASB@mx.isti.cnr.it>; Mon, 06 Dec 2010 13:19:54 +0100 (MET) Date: Mon, 06 Dec 2010 13:20:02 +0100 From: Spelic X-ASG-Orig-Subj: NFS corruption on ENOSPC (was: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram) Subject: NFS corruption on ENOSPC (was: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram) In-reply-to: <20101206040940.GA16103@dastard> To: Dave Chinner Cc: "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, linux-lvm@redhat.com, linux-nfs@vger.kernel.org Message-id: <4CFCD4F2.10300@shiftmail.org> MIME-version: 1.0 Content-type: text/plain; format=flowed; charset=ISO-8859-1 Content-transfer-encoding: 7bit User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.11) Gecko/20100713 Thunderbird/3.0.6 X-INSM-ip-source: 84.220.171.138 Auth Done References: <4CF7A539.1050206@shiftmail.org> <4CF7A9CF.2020904@shiftmail.org> <20101202230743.GZ16922@dastard> <4CF8F9BE.6000604@shiftmail.org> <20101206040940.GA16103@dastard> X-Barracuda-Connect: mx2.isti.cnr.it[194.119.192.4] X-Barracuda-Start-Time: 1291638072 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48633 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/06/2010 05:09 AM, Dave Chinner wrote: >> [Files become sparse at nfs-server-side upon hitting ENOSPC if NFS client uses local writeback caching] >> >> >> It's nice that the NFS server does local writeback caching but it >> should also cache the filesystem's free space (and check it >> periodically, since nfs-server is presumably not the only process >> writing in that filesystem) so that it doesn't accept more data than >> it can really write. Alternatively, when free space drops below 1GB >> (or a reasonable size based on network speed), nfs-server should >> turn off filesystem writeback caching. >> > This isn't a NFS server problem, or one that canbe worked around at > the server. it's a NFS _client_ problem in that it does not get > synchronous ENOSPC errors when using writeback caching. There is no > way for the NFS client to know the server is near ENOSPC conditions > prior to writing the data to the server as clients operate > independently. > > If you really want your NFS clients to behave correctly when the > server goes ENOSPC, turn off writeback caching at the client side, > not the server (i.e. use sync mounts on the client side). > Write performance will suck, but if you want sane ENOSPC behaviour... > > [adding NFS ML in cc] Thank you for your very clear explanation. Going without writeback cache is a problem (write performance sucks as you say), but guaranteeing to never reach ENOSPC also is hardly feasible, especially if humans are logged at client side and they are doing "whatever they want". I would suggest that either be the NFS client to do polling to see if it's near an ENOSPC and if yes disable writeback caching, or be the server to do the polling and if it finds out it's near-ENOSPC condition it sends a specific message to clients to warn them so that they can disable caching. Performed at client side wouldn't change the NFS protocol and can be good enough if one can specify how often freespace should be polled and what is the freespace threshold. Or with just one value: specify what is the max speed at which server disk can fill (next polling period can be inferred from current free space), and maybe also specify a minimum polling period (just in case). Regarding the last part of the email, perhaps I was not clear: > ..... > >> Holes in a random file! >> This is data corruption, and nobody is notified of this data >> corruption: no error at client side or server side! >> Is it good semantics? How could client get notified of this? Some >> kind of fsync maybe? >> > Use wireshark to determine if the server sends an ENOSPC to the > client when the first background write fails. I bet it does and that > your dd write failed with ENOSPC, too. Something stopped it writing > at 1.9GB.... > No, in that case I had written 15x100MB which was more than the available space but less than available+writeback_cache. So "cat" ended by itself and never got an ENOSPC error but data never reached the disk at the other side. However today I found that by using fsync, the problem is fortunately detected: # time cat randfile{001..015} | pv -b | dd conv=fsync of=/mnt/nfsram/randfile 1.46GB dd: fsync failed for `/mnt/nfsram/randfile': Input/output error 3072000+0 records in 3072000+0 records out 1572864000 bytes (1.6 GB) copied, 20.9101 s, 75.2 MB/s real 0m21.364s user 0m0.470s sys 0m11.440s so ok I understand that processes needing guarantees on written data should use fsync/fdatasync (which is good practice also for a local filesystem actually...) Thank you From trond.myklebust@fys.uio.no Mon Dec 6 07:32:22 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB6DWLMU247343 for ; Mon, 6 Dec 2010 07:32:22 -0600 X-ASG-Debug-ID: 1291642447-26d700bb0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-out1.uio.no (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1425E1C9A27 for ; Mon, 6 Dec 2010 05:34:07 -0800 (PST) Received: from mail-out1.uio.no (mail-out1.uio.no [129.240.10.57]) by cuda.sgi.com with ESMTP id HdtDnezJSwJ8nhO1 for ; Mon, 06 Dec 2010 05:34:07 -0800 (PST) Received: from mail-mx5.uio.no ([129.240.10.46]) by mail-out1.uio.no with esmtp (Exim 4.69) (envelope-from ) id 1PPbCc-00017V-S9; Mon, 06 Dec 2010 14:34:02 +0100 Received: from c-68-40-206-115.hsd1.mi.comcast.net ([68.40.206.115] helo=[192.168.1.12]) by mail-mx5.uio.no with esmtpsa (SSLv3:CAMELLIA256-SHA:256) user trondmy (Exim 4.69) (envelope-from ) id 1PPbCb-0004CF-Va; Mon, 06 Dec 2010 14:34:02 +0100 X-ASG-Orig-Subj: Re: NFS corruption on ENOSPC (was: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram) Subject: Re: NFS corruption on ENOSPC (was: Re: Bugs in mkfs.xfs, device mapper, xfs, and /dev/ram) From: Trond Myklebust To: Spelic Cc: Dave Chinner , "linux-kernel@vger.kernel.org" , xfs@oss.sgi.com, linux-lvm@redhat.com, linux-nfs@vger.kernel.org In-Reply-To: <4CFCD4F2.10300@shiftmail.org> References: <4CF7A539.1050206@shiftmail.org> <4CF7A9CF.2020904@shiftmail.org> <20101202230743.GZ16922@dastard> <4CF8F9BE.6000604@shiftmail.org> <20101206040940.GA16103@dastard> <4CFCD4F2.10300@shiftmail.org> Content-Type: text/plain; charset="UTF-8" Date: Mon, 06 Dec 2010 08:33:55 -0500 Message-ID: <1291642435.3990.8.camel@heimdal.trondhjem.org> Mime-Version: 1.0 X-Mailer: Evolution 2.32.1 (2.32.1-1.fc14) Content-Transfer-Encoding: 7bit X-UiO-Ratelimit-Test: rcpts/h 6 msgs/h 1 sum rcpts/h 6 sum msgs/h 1 total rcpts 1231 max rcpts/h 20 ratelimit 0 X-UiO-Spam-info: not spam, SpamAssassin (score=-5.0, required=5.0, autolearn=disabled, UIO_MAIL_IS_INTERNAL=-5, uiobl=NO, uiouri=NO) X-UiO-Scanned: DD6A827C3B7EFB58D1A1EA143A7B28E6DA7DFADD X-UiO-SPAM-Test: remote_host: 68.40.206.115 spam_score: -49 maxlevel 80 minaction 2 bait 0 mail/h: 1 total 485 max/h 7 blacklist 0 greylist 0 ratelimit 0 X-Barracuda-Connect: mail-out1.uio.no[129.240.10.57] X-Barracuda-Start-Time: 1291642448 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48638 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, 2010-12-06 at 13:20 +0100, Spelic wrote: > On 12/06/2010 05:09 AM, Dave Chinner wrote: > >> [Files become sparse at nfs-server-side upon hitting ENOSPC if NFS client uses local writeback caching] > >> > >> > >> It's nice that the NFS server does local writeback caching but it > >> should also cache the filesystem's free space (and check it > >> periodically, since nfs-server is presumably not the only process > >> writing in that filesystem) so that it doesn't accept more data than > >> it can really write. Alternatively, when free space drops below 1GB > >> (or a reasonable size based on network speed), nfs-server should > >> turn off filesystem writeback caching. > >> > > This isn't a NFS server problem, or one that canbe worked around at > > the server. it's a NFS _client_ problem in that it does not get > > synchronous ENOSPC errors when using writeback caching. There is no > > way for the NFS client to know the server is near ENOSPC conditions > > prior to writing the data to the server as clients operate > > independently. > > > > If you really want your NFS clients to behave correctly when the > > server goes ENOSPC, turn off writeback caching at the client side, > > not the server (i.e. use sync mounts on the client side). > > Write performance will suck, but if you want sane ENOSPC behaviour... > > > > > > [adding NFS ML in cc] > > Thank you for your very clear explanation. > > Going without writeback cache is a problem (write performance sucks as > you say), but guaranteeing to never reach ENOSPC also is hardly > feasible, especially if humans are logged at client side and they are > doing "whatever they want". > > I would suggest that either be the NFS client to do polling to see if > it's near an ENOSPC and if yes disable writeback caching, or be the > server to do the polling and if it finds out it's near-ENOSPC condition > it sends a specific message to clients to warn them so that they can > disable caching. > Performed at client side wouldn't change the NFS protocol and can be > good enough if one can specify how often freespace should be polled and > what is the freespace threshold. Or with just one value: specify what is > the max speed at which server disk can fill (next polling period can be > inferred from current free space), and maybe also specify a minimum > polling period (just in case). You can just as easily do this at the application level. The kernel can't do it any more reliably than the application can, so there really is no point in doing it there. We already ensure that when the server does send us an error, we switch to synchronous operation until the error clears. Trond From BATV+97ff857f1b70a67ae353+2661+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 6 08:31:26 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB6EVPfD253779 for ; Mon, 6 Dec 2010 08:31:26 -0600 X-ASG-Debug-ID: 1291645991-3c7401ec0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D6C06141E06F for ; Mon, 6 Dec 2010 06:33:12 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id LBcv47EQwPNQ9gxW for ; Mon, 06 Dec 2010 06:33:12 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PPc7o-0002pv-AV; Mon, 06 Dec 2010 14:33:08 +0000 Date: Mon, 6 Dec 2010 09:33:08 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 6/8] xfs: remove all the inodes on a buffer from the AIL in bulk Subject: Re: [PATCH 6/8] xfs: remove all the inodes on a buffer from the AIL in bulk Message-ID: <20101206143308.GA31100@infradead.org> References: <1290993152-20999-1-git-send-email-david@fromorbit.com> <1290993152-20999-7-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290993152-20999-7-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291645992 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean While the patch looks good for the ail lock contetion removal, I don't quite like the model with the double iteration over the log item list on the buffer. What do you think about the following plan: (1) merge xfs_istale_done into xfs_iflush_done by checking for XFS_ISTALE (2) convert not only the inode log item completion to your new scheme, but also the dquots (3) replace xfs_buf_do_callbacks with a callback in the buffer, which now points to the inode and dqout routines, or calls the completion for the only items in "normal" buf items. From BATV+97ff857f1b70a67ae353+2661+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 6 08:34:00 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB6EY0C2254237 for ; Mon, 6 Dec 2010 08:34:00 -0600 X-ASG-Debug-ID: 1291646147-16f103620000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CC4B11C99F6D for ; Mon, 6 Dec 2010 06:35:47 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 4daKGhDhP2kgfAff for ; Mon, 06 Dec 2010 06:35:47 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PPcAL-0003fV-Ag; Mon, 06 Dec 2010 14:35:45 +0000 Date: Mon, 6 Dec 2010 09:35:45 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 7/8] xfs: use AIL bulk update function to implement single updates Subject: Re: [PATCH 7/8] xfs: use AIL bulk update function to implement single updates Message-ID: <20101206143545.GB31100@infradead.org> References: <1290993152-20999-1-git-send-email-david@fromorbit.com> <1290993152-20999-8-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290993152-20999-8-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291646147 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Nov 29, 2010 at 12:12:31PM +1100, Dave Chinner wrote: > From: Dave Chinner > > We now have two copies of AIL insert operations that are mostly > duplicate functionality. The single log item updates can be > implemented via the bulk updates by turning xfs_trans_ail_update() > into a simple wrapper. This removes all the duplicate insert > functionality and associated helpers. Looks good, although the comment above xfs_trans_ail_update_bulk, stating it's the bulk version of xfs_trans_ail_update isn't too helpful any more after this patch. From BATV+97ff857f1b70a67ae353+2661+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 6 08:35:45 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB6EZjdK254396 for ; Mon, 6 Dec 2010 08:35:45 -0600 X-ASG-Debug-ID: 1291646252-2721031c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0B9CD1C9E60 for ; Mon, 6 Dec 2010 06:37:32 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id N78lAO2PE4GdFk5P for ; Mon, 06 Dec 2010 06:37:32 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PPcC4-0003gP-Ec; Mon, 06 Dec 2010 14:37:32 +0000 Date: Mon, 6 Dec 2010 09:37:32 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 8/8] xfs: use AIL bulk delete function to implement single delete Subject: Re: [PATCH 8/8] xfs: use AIL bulk delete function to implement single delete Message-ID: <20101206143732.GC31100@infradead.org> References: <1290993152-20999-1-git-send-email-david@fromorbit.com> <1290993152-20999-9-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290993152-20999-9-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291646253 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean > -/* > * Bulk update version of xfs_trans_ail_delete > * > * This version takes an array of log items that all need to removed from the > * AIL. The caller is already holding the AIL lock, and done all the checks Not overly useful now that the non-bulk version is gone. > * necessary to ensure the items passed in via @lgia are ready for deletion. > + * If an item we delete in the AIL is the minimum one, update the tail lsn in > + * the log manager. > * > * This function will not drop the AIL lock until all items are removed from > * the AIL to minimise the amount of lock traffic on the AIL. This does not > * greatly increase the AIL hold time, but does significantly reduce the amount > * of traffic on the lock, especially during IO completion. > + * > + * This function must be called with the AIL lock held. The lock is dropped > + * before returning. These should be in the patch introducing xfs_trans_ail_delete_bulk. Otherwise looks good. From SRS0+od1M+10+fromorbit.com=david@internode.on.net Mon Dec 6 21:43:21 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB73hIL9080590 for ; Mon, 6 Dec 2010 21:43:20 -0600 X-ASG-Debug-ID: 1291693501-5ff8039a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8C97E14223AA for ; Mon, 6 Dec 2010 19:45:01 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id UCW5xyiDAmzbiR6G for ; Mon, 06 Dec 2010 19:45:01 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 37555951-1927428 for multiple; Tue, 07 Dec 2010 14:14:59 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PPoU4-00067W-IC; Tue, 07 Dec 2010 14:44:56 +1100 Date: Tue, 7 Dec 2010 14:44:56 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 6/8] xfs: remove all the inodes on a buffer from the AIL in bulk Subject: Re: [PATCH 6/8] xfs: remove all the inodes on a buffer from the AIL in bulk Message-ID: <20101207034456.GB29856@dastard> References: <1290993152-20999-1-git-send-email-david@fromorbit.com> <1290993152-20999-7-git-send-email-david@fromorbit.com> <20101206143308.GA31100@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101206143308.GA31100@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1291693503 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48695 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 06, 2010 at 09:33:08AM -0500, Christoph Hellwig wrote: > While the patch looks good for the ail lock contetion removal, I don't > quite like the model with the double iteration over the log item list > on the buffer. What do you think about the following plan: > > (1) merge xfs_istale_done into xfs_iflush_done by checking for > XFS_ISTALE > (2) convert not only the inode log item completion to your new scheme, > but also the dquots > (3) replace xfs_buf_do_callbacks with a callback in the buffer, which > now points to the inode and dqout routines, or calls the completion > for the only items in "normal" buf items. Seems like a reasonable approach. However, what I'd prefer to do is make these changes as a separate set of changes on top of this patch series rather than try to integrate them into the existing series. If there are problems, that should make it more bisectable. Do you have any concerns with such an approach? Cheers, Dave. -- Dave Chinner david@fromorbit.com From BATV+4931a86851e2f3a4cf07+2662+infradead.org+hch@bombadil.srs.infradead.org Tue Dec 7 01:37:42 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB77beIw110659 for ; Tue, 7 Dec 2010 01:37:42 -0600 X-ASG-Debug-ID: 1291707567-68e502950000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DCFD31CCE47 for ; Mon, 6 Dec 2010 23:39:27 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 6bCEHQveucwoZ16s for ; Mon, 06 Dec 2010 23:39:27 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PPs8z-0006Bx-HJ; Tue, 07 Dec 2010 07:39:25 +0000 Date: Tue, 7 Dec 2010 02:39:25 -0500 From: Christoph Hellwig To: Dave Chinner Cc: Christoph Hellwig , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 6/8] xfs: remove all the inodes on a buffer from the AIL in bulk Subject: Re: [PATCH 6/8] xfs: remove all the inodes on a buffer from the AIL in bulk Message-ID: <20101207073925.GA25617@infradead.org> References: <1290993152-20999-1-git-send-email-david@fromorbit.com> <1290993152-20999-7-git-send-email-david@fromorbit.com> <20101206143308.GA31100@infradead.org> <20101207034456.GB29856@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101207034456.GB29856@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291707567 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 07, 2010 at 02:44:56PM +1100, Dave Chinner wrote: > On Mon, Dec 06, 2010 at 09:33:08AM -0500, Christoph Hellwig wrote: > > While the patch looks good for the ail lock contetion removal, I don't > > quite like the model with the double iteration over the log item list > > on the buffer. What do you think about the following plan: > > > > (1) merge xfs_istale_done into xfs_iflush_done by checking for > > XFS_ISTALE > > (2) convert not only the inode log item completion to your new scheme, > > but also the dquots > > (3) replace xfs_buf_do_callbacks with a callback in the buffer, which > > now points to the inode and dqout routines, or calls the completion > > for the only items in "normal" buf items. > > Seems like a reasonable approach. However, what I'd prefer to do is > make these changes as a separate set of changes on top of this patch > series rather than try to integrate them into the existing series. > If there are problems, that should make it more bisectable. Do you > have any concerns with such an approach? Sounds fine, although I think getting rid of xfs_istale_done might be worth doing before this patch. From BATV+4931a86851e2f3a4cf07+2662+infradead.org+hch@bombadil.srs.infradead.org Tue Dec 7 04:14:55 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7AEsZv130564 for ; Tue, 7 Dec 2010 04:14:55 -0600 X-ASG-Debug-ID: 1291717002-1c93015b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 6FEEA1423160 for ; Tue, 7 Dec 2010 02:16:42 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id JVaSI3a18hijb6ys for ; Tue, 07 Dec 2010 02:16:42 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PPubB-0006lK-PW for xfs@oss.sgi.com; Tue, 07 Dec 2010 10:16:41 +0000 Date: Tue, 7 Dec 2010 05:16:41 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH] xfs: log timestamp changes to the source inode in rename Subject: [PATCH] xfs: log timestamp changes to the source inode in rename Message-ID: <20101207101641.GA25995@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291717002 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Now that we don't mark VFS inodes dirty anymore for internal timestamp changes, but rely on the transaction subsystem to push them out, we need to explicitly log the source inode in rename after updating it's timestamps to make sure the changes actually get forced out by sync/fsync or an AIL push. We already account for the fourth inode in the log reservation, as a rename of directories needs to update the nlink field, so just adding the xfs_trans_log_inode call is enough. This fixes the xfsqa 065 regression introduced by: "xfs: don't use vfs writeback for pure metadata modifications" Signed-off-by: Christoph Hellwig Index: xfs/fs/xfs/xfs_rename.c =================================================================== --- xfs.orig/fs/xfs/xfs_rename.c 2010-12-07 11:05:15.661253391 +0100 +++ xfs/fs/xfs/xfs_rename.c 2010-12-07 11:05:25.139275042 +0100 @@ -297,6 +297,7 @@ xfs_rename( * it and some incremental backup programs won't work without it. */ xfs_trans_ichgtime(tp, src_ip, XFS_ICHGTIME_CHG); + xfs_trans_log_inode(tp, src_ip, XFS_ILOG_CORE); /* * Adjust the link count on src_dp. This is necessary when From BATV+4931a86851e2f3a4cf07+2662+infradead.org+hch@bombadil.srs.infradead.org Tue Dec 7 04:16:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7AG0P5130685 for ; Tue, 7 Dec 2010 04:16:01 -0600 X-ASG-Debug-ID: 1291717068-146d01750000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id BE3EF1C9DEC0 for ; Tue, 7 Dec 2010 02:17:48 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id zgCck5NhE37CF9WS for ; Tue, 07 Dec 2010 02:17:48 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PPucE-0006mA-IV; Tue, 07 Dec 2010 10:17:46 +0000 Date: Tue, 7 Dec 2010 05:17:46 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 1/2] xfs: dynamic speculative EOF preallocation Subject: Re: [PATCH 1/2] xfs: dynamic speculative EOF preallocation Message-ID: <20101207101746.GB25995@infradead.org> References: <1290991431-20519-1-git-send-email-david@fromorbit.com> <1290991431-20519-2-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1290991431-20519-2-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291717068 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean I need the patch below to make the new code link on 32-bit systems: Index: xfs/fs/xfs/xfs_mount.c =================================================================== --- xfs.orig/fs/xfs/xfs_mount.c 2010-12-07 11:01:50.394021585 +0100 +++ xfs/fs/xfs/xfs_mount.c 2010-12-07 11:02:46.231256257 +0100 @@ -1111,7 +1111,10 @@ xfs_set_low_space_thresholds( int i; for (i = 0; i < XFS_LOWSP_MAX; i++) { - mp->m_low_space[i] = mp->m_sb.sb_dblocks / 100 * (i + 1); + __uint64_t space = mp->m_sb.sb_dblocks; + do_div(space, 100); + + mp->m_low_space[i] = space * (i + 1); } } From SRS0+8zW4+10+fromorbit.com=david@internode.on.net Tue Dec 7 04:48:11 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7AmA6Y135501 for ; Tue, 7 Dec 2010 04:48:11 -0600 X-ASG-Debug-ID: 1291718996-5bec00060000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B616A1C9E0C9 for ; Tue, 7 Dec 2010 02:49:56 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id x5az2KiRp6qBzdy4 for ; Tue, 07 Dec 2010 02:49:56 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49102023-1927428 for multiple; Tue, 07 Dec 2010 21:19:54 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PPv7I-0006d3-Rt; Tue, 07 Dec 2010 21:49:52 +1100 Date: Tue, 7 Dec 2010 21:49:52 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 1/2] xfs: dynamic speculative EOF preallocation Subject: Re: [PATCH 1/2] xfs: dynamic speculative EOF preallocation Message-ID: <20101207104952.GC16103@dastard> References: <1290991431-20519-1-git-send-email-david@fromorbit.com> <1290991431-20519-2-git-send-email-david@fromorbit.com> <20101207101746.GB25995@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101207101746.GB25995@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1291718997 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48724 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 07, 2010 at 05:17:46AM -0500, Christoph Hellwig wrote: > I need the patch below to make the new code link on 32-bit systems: > > Index: xfs/fs/xfs/xfs_mount.c > =================================================================== > --- xfs.orig/fs/xfs/xfs_mount.c 2010-12-07 11:01:50.394021585 +0100 > +++ xfs/fs/xfs/xfs_mount.c 2010-12-07 11:02:46.231256257 +0100 > @@ -1111,7 +1111,10 @@ xfs_set_low_space_thresholds( > int i; > > for (i = 0; i < XFS_LOWSP_MAX; i++) { > - mp->m_low_space[i] = mp->m_sb.sb_dblocks / 100 * (i + 1); > + __uint64_t space = mp->m_sb.sb_dblocks; > + do_div(space, 100); > + > + mp->m_low_space[i] = space * (i + 1); > } > } Yes, makes sense. I'll fold that into the latest version of the patch. Thanks. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+h4DP+10+fromorbit.com=david@internode.on.net Tue Dec 7 05:18:48 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7BIlMh139444 for ; Tue, 7 Dec 2010 05:18:47 -0600 X-ASG-Debug-ID: 1291720832-5bec014e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 119A31C9DEDD for ; Tue, 7 Dec 2010 03:20:32 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id RvH89D5X3JzyN0tm for ; Tue, 07 Dec 2010 03:20:32 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 48482674-1927428 for multiple; Tue, 07 Dec 2010 21:50:31 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PPvav-0006hA-Tr; Tue, 07 Dec 2010 22:20:29 +1100 Date: Tue, 7 Dec 2010 22:20:24 +1100 From: Dave Chinner To: Ajeet Yadav Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: XFS mount fail: XFS_WANT_CORRUPTED_GOTO fs/xfs/xfs_alloc.c Subject: Re: XFS mount fail: XFS_WANT_CORRUPTED_GOTO fs/xfs/xfs_alloc.c Message-ID: <20101207112024.GD16103@dastard> References: <20101202224506.GY16922@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1291720835 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48726 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Sat, Dec 04, 2010 at 09:49:25AM +0530, Ajeet Yadav wrote: > Our test case is automated: > 1. Create large number of file of 6KB sizes ( 6KB is taken, we wanted to > increase journal load, and file size not in multiple of file system block > size) > 2. Set target to reboot at random seconds seconds. > 3. Next boot do "ls" of all files in XFS partition. > 4. Remove all files in XFS. > 5. Go back to step 1 > > The purpose of this test is to test journal and stability of XFS filestem. > > Do you think, we should consider this test case ? Are you running with barriers enabled? What are your mkfs and mount options? Also, does the problem exist on a current kernel? We've fixed lots of writeback related problems since 2.6.30, so I'd suggest that you need to reproduce this on a current kernel before anyone will spend large amounts of time trying to track it down. Especially as xfstests 136-140 do similar testing (just without the reboots) and don't show any problems. > Other is when we should run xfs_repair ? because if mount fails and journal > contain dirty logs then xfs_repair does not run, we are forced to use (-L) > option but its description say that (-L) can corrupt the file system. Yes, it can. > Other case even if xfs mount successfully, even in that case accessing some > files give IO input/ output error. Which means something got corrupted. Look in dmesg for reasons why. > 1. I recommend the following usage for xfs_repair so that we do not come > accross these problem > Mount Success -> Umount -> run xfs_repair -> mount > Mount fails -> try xfs_repair -> xfs_repair fails -> finally xfs_repair > -L -> mount > > Adding above mount + xfs_repair procedure to script makes file system > stable. But other member of my team do not agree as it increases mount time. I agree with your team members. All you are proposing to do is to hide failures that need further investigation... Cheers, Dave. -- Dave Chinner david@fromorbit.com From lists@nabble.com Tue Dec 7 05:48:04 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_TO_NO_BRKTS_FREEMAIL autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7Bm4nq142847 for ; Tue, 7 Dec 2010 05:48:04 -0600 X-ASG-Debug-ID: 1291722589-747a01590000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from kuber.nabble.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E38A21420CC4 for ; Tue, 7 Dec 2010 03:49:49 -0800 (PST) Received: from kuber.nabble.com (kuber.nabble.com [216.139.236.158]) by cuda.sgi.com with ESMTP id 4YfOpZ4QxrDUPZdy for ; Tue, 07 Dec 2010 03:49:49 -0800 (PST) Received: from isper.nabble.com ([192.168.236.156]) by kuber.nabble.com with esmtp (Exim 4.63) (envelope-from ) id 1PPw3J-0000DU-CT for xfs@oss.sgi.com; Tue, 07 Dec 2010 03:49:49 -0800 Message-ID: <30395558.post@talk.nabble.com> Date: Tue, 7 Dec 2010 03:49:49 -0800 (PST) From: blacknred To: xfs@oss.sgi.com X-ASG-Orig-Subj: possible xfs corruption Subject: possible xfs corruption MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Nabble-From: leo1783@hotmail.co.uk X-Barracuda-Connect: kuber.nabble.com[216.139.236.158] X-Barracuda-Start-Time: 1291722590 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48727 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hi... I'm stuck with a storage issue on reboot. Initially doubted the storage, but dmesg throws these errors. Now wondering whether this is a fs issue? Any thoughts as to whats going on here? XFS: failed to locate log tail XFS: log mount/recovery failed: error 117 XFS: log mount failed XFS mounting filesystem cciss/c0d0 Filesystem "cciss/c0d0": XFS internal error xlog_clear_stale_blocks(2) at line 1237 of file /home/buildsvn/rpmbuild/BUILD/xfs-kmod-0.4/_kmod_build_PAE/xfs_log_recover.c. Caller 0xf8aa7892 [] xlog_find_tail+0x91b/0xa4a [xfs] [] xlog_recover+0x15/0x20b [xfs] [] xlog_recover+0x15/0x20b [xfs] [] xfs_buf_get_empty+0x2a/0x33 [xfs] [] xfs_log_mount+0x467/0x4ab [xfs] [] kmem_zalloc+0xd/0x34 [xfs] [] xfs_mountfs+0x9f5/0xdfb [xfs] [] xfs_fs_vcmn_err+0x5f/0x83 [xfs] [] xfs_mountfs_check_barriers+0xb8/0xd0 [xfs] [] xfs_mount+0x75e/0x82a [xfs] [] xfs_mount+0x0/0x82a [xfs] [] vfs_mount+0x17/0x1a [xfs] [] xfs_fs_fill_super+0x68/0x1a5 [xfs] [] snprintf+0x1c/0x1f [] disk_name+0x56/0x60 [] get_sb_bdev+0xc6/0x113 [] xfs_fs_get_sb+0x12/0x16 [xfs] [] xfs_fs_fill_super+0x0/0x1a5 [xfs] [] vfs_kern_mount+0x7d/0xf2 [] do_kern_mount+0x25/0x36 [] do_mount+0x5fb/0x66b [] avc_has_perm+0x3c/0x46 [] avc_has_perm+0x3c/0x46 [] selinux_inode_alloc_security+0x50/0x7b [] inode_doinit_with_dentry+0x8a/0x495 [] get_page_from_freelist+0x96/0x370 [] __alloc_pages+0x69/0x2cf [] copy_mount_options+0x26/0x109 [] sys_mount+0x6d/0xa5 [] sysenter_past_esp+0x56/0x79 Thanks in advance David -- View this message in context: http://old.nabble.com/possible-xfs-corruption-tp30395558p30395558.html Sent from the Xfs - General mailing list archive at Nabble.com. From btharindu@gmail.com Tue Dec 7 06:55:36 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,FREEMAIL_FROM, HTML_MESSAGE,T_DKIM_INVALID,T_TO_NO_BRKTS_FREEMAIL autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7CtaG2150672 for ; Tue, 7 Dec 2010 06:55:36 -0600 X-ASG-Debug-ID: 1291726643-52c203e60000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-iw0-f181.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CFA491CDA77 for ; Tue, 7 Dec 2010 04:57:23 -0800 (PST) Received: from mail-iw0-f181.google.com (mail-iw0-f181.google.com [209.85.214.181]) by cuda.sgi.com with ESMTP id 2GbNeLkF4qPrSo0n for ; Tue, 07 Dec 2010 04:57:23 -0800 (PST) Received: by iwn3 with SMTP id 3so17007803iwn.26 for ; Tue, 07 Dec 2010 04:57:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:mime-version:received:from:date :message-id:subject:to:content-type; bh=RbW+Ep3b0vEEDqooeiC1RmPIWtg5SlNw0Cfne/Bnueo=; b=jYjHcbAz8mAB7g7KMJEnpduCsJX0GHasHwJGbANcQoaxWm1C5ngT7yCAE+XsrrO4Mp encXXh9d+ciJAYiMFzrub+kxL0zjPuiYeFfmEo0rxnVbe/zgnzuzz2pfRy91TGI3Dxnx hqPImwI2KkMIKhq9Dx0wtAxJ8GNpyBYKgsJqo= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:from:date:message-id:subject:to:content-type; b=tO0UJggW0wHptJG6G7gWND3JraB1B9kZW1rhWfQLxnncH4GMx/J+HGeD8den3ohler tgGxx5nt0qwtM2Eh1eZeYnd6nCsMoVAxSRVnCIj2dn0Cqe/Q8wcuHwpzwTZH3NzmvhFN baNbJtO8GIbfpGeOcE4folnaPBz9g4g03R8EM= Received: by 10.231.20.70 with SMTP id e6mr7418786ibb.199.1291726642964; Tue, 07 Dec 2010 04:57:22 -0800 (PST) MIME-Version: 1.0 Received: by 10.231.12.4 with HTTP; Tue, 7 Dec 2010 04:56:52 -0800 (PST) From: Tharindu Rukshan Bamunuarachchi Date: Tue, 7 Dec 2010 18:26:52 +0530 Message-ID: X-ASG-Orig-Subj: xfs_count_page_state inside kswapd Subject: xfs_count_page_state inside kswapd To: xfs@oss.sgi.com Content-Type: multipart/alternative; boundary=000325576092b36b900496d18bf6 X-Barracuda-Connect: mail-iw0-f181.google.com[209.85.214.181] X-Barracuda-Start-Time: 1291726643 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M, DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48732 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --000325576092b36b900496d18bf6 Content-Type: text/plain; charset=UTF-8 Dear All, We got following oops in one of our SLES 11 server. This occurred inside swapd and we running our server swap turned off.. Could this be memory corruption or possible old bug in code ? Please help. Thanks Dec 6 22:55:46 tm-spes-md102 kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 Dec 6 22:55:46 tm-spes-md102 kernel: IP: [] xfs_count_page_state+0x25/0x66 [xfs] Dec 6 22:55:46 tm-spes-md102 kernel: PGD 37dc4e067 PUD 16f631067 PMD 0 Dec 6 22:55:46 tm-spes-md102 kernel: Oops: 0000 [1] SMP Dec 6 22:55:46 tm-spes-md102 kernel: last sysfs file: /sys/devices/pci0000:00/0000:00:03.0/0000:15:00.0/infiniband/mlx4_0/node_type Dec 6 22:55:46 tm-spes-md102 kernel: CPU 2 Dec 6 22:55:46 tm-spes-md102 kernel: Modules linked in: af_packet st ide_disk ide_cd_mod lp parport_pc ppdev parport nfs lockd nfs_acl sunrpc ipmi_devintf ipmi_si ipmi_msghandler bonding microcode binfmt_misc rdma_ucm(N) ib_sdp(N) rdma_cm(N) iw_cm(N) ib_addr(N) ib_ipoib( N) ib_cm(N) ib_sa(N) ipv6 ib_uverbs(N) ib_umad(N) mlx4_en(N) mlx4_ib(N) ib_mthca(N) ib_mad(N) ib_core(N) fuse ext2 xfs loop dm_mod joyde v cdc_ether rtc_cmos usbhid usbnet rtc_core mlx4_core(N) hid shpchp i2c_i801 pci_hotplug button pcspkr mii sr_mod i2c_core rtc_lib ff_me mless cdrom sg uhci_hcd sd_mod ehci_hcd crc_t10dif usbcore edd ext3 mbcache jbd fan thermal processor thermal_sys hwmon ide_pci_generic ide_core ata_generic ata_piix libata dock megaraid_sas scsi_mod [last unloaded: parport_pc] Dec 6 22:55:46 tm-spes-md102 kernel: Supported: No, Unsupported modules are loaded Dec 6 22:55:46 tm-spes-md102 kernel: Pid: 58, comm: kswapd0 Tainted: G 2.6.27.45-0.1-default #1 Dec 6 22:55:46 tm-spes-md102 kernel: RIP: 0010:[] [] xfs_count_page_state+0x25/0x66 [xfs] Dec 6 22:55:46 tm-spes-md102 kernel: RSP: 0018:ffff88037cdcbbe8 EFLAGS: 00010207 Dec 6 22:55:46 tm-spes-md102 kernel: RAX: ffff88038ceff610 RBX: ffffe20012c30b40 RCX: ffff88037cdcbc34 Dec 6 22:55:46 tm-spes-md102 kernel: RDX: ffff88037cdcbc38 RSI: ffff88037cdcbc3c RDI: ffffe20012c30b40 Dec 6 22:55:46 tm-spes-md102 kernel: RBP: 0000000000000000 R08: 0000000000000021 R09: 0000000000000000 Dec 6 22:55:46 tm-spes-md102 kernel: R10: ffff88038ceff678 R11: ffffffffa0251b18 R12: ffff880517690480 Dec 6 22:55:46 tm-spes-md102 kernel: R13: ffff88037cdcbce0 R14: 00000000002548c2 R15: ffff880517690590 Dec 6 22:55:46 tm-spes-md102 kernel: FS: 0000000000000000(0000) GS:ffff88037e520e40(0000) knlGS:0000000000000000 Dec 6 22:55:46 tm-spes-md102 kernel: CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b Dec 6 22:55:46 tm-spes-md102 kernel: CR2: 0000000000000000 CR3: 000000016f670000 CR4: 00000000000006e0 Dec 6 22:55:46 tm-spes-md102 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Dec 6 22:55:46 tm-spes-md102 kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Dec 6 22:55:46 tm-spes-md102 kernel: Process kswapd0 (pid: 58, threadinfo ffff88037cdca000, task ffff88037cdc8780) Dec 6 22:55:47 tm-spes-md102 kernel: Stack: ffffffffa0251b68 0000000000000000 0000000000000001 0000000000000000 Dec 6 22:55:47 tm-spes-md102 kernel: 0000000000000001 0000000000000000 0000000000000000 0000000000000000 Dec 6 22:55:47 tm-spes-md102 kernel: 0000000000000000 00000000002acfa4 0000000000000000 ffffe20012c30b40 Dec 6 22:55:47 tm-spes-md102 kernel: Call Trace: Dec 6 22:55:47 tm-spes-md102 kernel: [] xfs_vm_releasepage+0x50/0xa5 [xfs] Dec 6 22:55:47 tm-spes-md102 kernel: [] __invalidate_mapping_pages+0x98/0x12d Dec 6 22:55:47 tm-spes-md102 kernel: [] prune_icache+0xe7/0x1f7 Dec 6 22:55:47 tm-spes-md102 kernel: [] shrink_icache_memory+0x15/0x32 Dec 6 22:55:47 tm-spes-md102 kernel: [] shrink_slab+0xe4/0x157 Dec 6 22:55:47 tm-spes-md102 kernel: [] balance_pgdat+0x292/0x3d6 Dec 6 22:55:53 tm-spes-md102 kernel: [] kswapd+0x12a/0x12c Dec 6 22:55:53 tm-spes-md102 kernel: [] kthread+0x47/0x73 Dec 6 22:55:53 tm-spes-md102 kernel: [] child_rip+0xa/0x11 Dec 6 22:55:53 tm-spes-md102 kernel: Dec 6 22:55:53 tm-spes-md102 kernel: Dec 6 22:55:53 tm-spes-md102 kernel: Code: 1f eb ef 90 90 90 c7 01 00 00 00 00 c7 02 00 00 00 00 c7 06 00 00 00 00 48 8b 07 f6 c4 10 75 04 0f 0b eb fe 48 8b 47 10 49 89 c1 <4d> 8b 01 41 f6 c0 01 74 0e 41 f6 c0 20 75 08 c7 02 01 00 00 00 Dec 6 22:55:53 tm-spes-md102 kernel: RIP [] xfs_count_page_state+0x25/0x66 [xfs] Dec 6 22:55:53 tm-spes-md102 kernel: RSP Dec 6 22:55:53 tm-spes-md102 kernel: CR2: 0000000000000000 __ Tharindu *R* Bamunuarachchi. --000325576092b36b900496d18bf6 Content-Type: text/html; charset=UTF-8 Dear All,

We got following oops in one of our SLES 11 server. This occurred inside swapd and we running our server swap turned off..

Could this be memory corruption or possible old bug in code ?

Please help.
Thanks

Dec 6 22:55:46 tm-spes-md102 kernel: BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
Dec 6 22:55:46 tm-spes-md102 kernel: IP: [<ffffffffa0250659>] xfs_count_page_state+0x25/0x66 [xfs]
Dec 6 22:55:46 tm-spes-md102 kernel: PGD 37dc4e067 PUD 16f631067 PMD 0
Dec 6 22:55:46 tm-spes-md102 kernel: Oops: 0000 [1] SMP
Dec 6 22:55:46 tm-spes-md102 kernel: last sysfs file: /sys/devices/pci0000:00/0000:00:03.0/0000:15:00.0/infiniband/mlx4_0/node_type
Dec 6 22:55:46 tm-spes-md102 kernel: CPU 2
Dec 6 22:55:46 tm-spes-md102 kernel: Modules linked in: af_packet st ide_disk ide_cd_mod lp parport_pc ppdev parport nfs lockd nfs_acl
sunrpc ipmi_devintf ipmi_si ipmi_msghandler bonding microcode binfmt_misc rdma_ucm(N) ib_sdp(N) rdma_cm(N) iw_cm(N) ib_addr(N) ib_ipoib(
N) ib_cm(N) ib_sa(N) ipv6 ib_uverbs(N) ib_umad(N) mlx4_en(N) mlx4_ib(N) ib_mthca(N) ib_mad(N) ib_core(N) fuse ext2 xfs loop dm_mod joyde
v cdc_ether rtc_cmos usbhid usbnet rtc_core mlx4_core(N) hid shpchp i2c_i801 pci_hotplug button pcspkr mii sr_mod i2c_core rtc_lib ff_me
mless cdrom sg uhci_hcd sd_mod ehci_hcd crc_t10dif usbcore edd ext3 mbcache jbd fan thermal processor thermal_sys hwmon ide_pci_generic
ide_core ata_generic ata_piix libata dock megaraid_sas scsi_mod [last unloaded: parport_pc]
Dec 6 22:55:46 tm-spes-md102 kernel: Supported: No, Unsupported modules are loaded
Dec 6 22:55:46 tm-spes-md102 kernel: Pid: 58, comm: kswapd0 Tainted: G 2.6.27.45-0.1-default #1
Dec 6 22:55:46 tm-spes-md102 kernel: RIP: 0010:[<ffffffffa0250659>] [<ffffffffa0250659>] xfs_count_page_state+0x25/0x66 [xfs]
Dec 6 22:55:46 tm-spes-md102 kernel: RSP: 0018:ffff88037cdcbbe8 EFLAGS: 00010207
Dec 6 22:55:46 tm-spes-md102 kernel: RAX: ffff88038ceff610 RBX: ffffe20012c30b40 RCX: ffff88037cdcbc34
Dec 6 22:55:46 tm-spes-md102 kernel: RDX: ffff88037cdcbc38 RSI: ffff88037cdcbc3c RDI: ffffe20012c30b40
Dec 6 22:55:46 tm-spes-md102 kernel: RBP: 0000000000000000 R08: 0000000000000021 R09: 0000000000000000
Dec 6 22:55:46 tm-spes-md102 kernel: R10: ffff88038ceff678 R11: ffffffffa0251b18 R12: ffff880517690480
Dec 6 22:55:46 tm-spes-md102 kernel: R13: ffff88037cdcbce0 R14: 00000000002548c2 R15: ffff880517690590
Dec 6 22:55:46 tm-spes-md102 kernel: FS: 0000000000000000(0000) GS:ffff88037e520e40(0000) knlGS:0000000000000000
Dec 6 22:55:46 tm-spes-md102 kernel: CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b
Dec 6 22:55:46 tm-spes-md102 kernel: CR2: 0000000000000000 CR3: 000000016f670000 CR4: 00000000000006e0
Dec 6 22:55:46 tm-spes-md102 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
Dec 6 22:55:46 tm-spes-md102 kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Dec 6 22:55:46 tm-spes-md102 kernel: Process kswapd0 (pid: 58, threadinfo ffff88037cdca000, task ffff88037cdc8780)
Dec 6 22:55:47 tm-spes-md102 kernel: Stack: ffffffffa0251b68 0000000000000000 0000000000000001 0000000000000000
Dec 6 22:55:47 tm-spes-md102 kernel: 0000000000000001 0000000000000000 0000000000000000 0000000000000000
Dec 6 22:55:47 tm-spes-md102 kernel: 0000000000000000 00000000002acfa4 0000000000000000 ffffe20012c30b40
Dec 6 22:55:47 tm-spes-md102 kernel: Call Trace:
Dec 6 22:55:47 tm-spes-md102 kernel: [<ffffffffa0251b68>] xfs_vm_releasepage+0x50/0xa5 [xfs]
Dec 6 22:55:47 tm-spes-md102 kernel: [<ffffffff8028bf57>] __invalidate_mapping_pages+0x98/0x12d
Dec 6 22:55:47 tm-spes-md102 kernel: [<ffffffff802c4ca1>] prune_icache+0xe7/0x1f7
Dec 6 22:55:47 tm-spes-md102 kernel: [<ffffffff802c4dc6>] shrink_icache_memory+0x15/0x32
Dec 6 22:55:47 tm-spes-md102 kernel: [<ffffffff8028dc59>] shrink_slab+0xe4/0x157
Dec 6 22:55:47 tm-spes-md102 kernel: [<ffffffff8028e173>] balance_pgdat+0x292/0x3d6
Dec 6 22:55:53 tm-spes-md102 kernel: [<ffffffff8028e3e1>] kswapd+0x12a/0x12c
Dec 6 22:55:53 tm-spes-md102 kernel: [<ffffffff8024fb2f>] kthread+0x47/0x73
Dec 6 22:55:53 tm-spes-md102 kernel: [<ffffffff8020cfb9>] child_rip+0xa/0x11
Dec 6 22:55:53 tm-spes-md102 kernel:
Dec 6 22:55:53 tm-spes-md102 kernel:
Dec 6 22:55:53 tm-spes-md102 kernel: Code: 1f eb ef 90 90 90 c7 01 00 00 00 00 c7 02 00 00 00 00 c7 06 00 00 00 00 48 8b 07 f6 c4 10 75
04 0f 0b eb fe 48 8b 47 10 49 89 c1 <4d> 8b 01 41 f6 c0 01 74 0e 41 f6 c0 20 75 08 c7 02 01 00 00 00
Dec 6 22:55:53 tm-spes-md102 kernel: RIP [<ffffffffa0250659>] xfs_count_page_state+0x25/0x66 [xfs]
Dec 6 22:55:53 tm-spes-md102 kernel: RSP <ffff88037cdcbbe8>
Dec 6 22:55:53 tm-spes-md102 kernel: CR2: 0000000000000000

__
Tharindu R Bamunuarachchi.

--000325576092b36b900496d18bf6-- From eflorac@intellique.com Tue Dec 7 08:08:57 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7E8uqQ158213 for ; Tue, 7 Dec 2010 08:08:56 -0600 X-ASG-Debug-ID: 1291731038-78a201a00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp4-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4E2131C9EA96 for ; Tue, 7 Dec 2010 06:10:41 -0800 (PST) Received: from smtp4-g21.free.fr (smtp4-g21.free.fr [212.27.42.4]) by cuda.sgi.com with ESMTP id QsUtZ6AdEOBh3REs for ; Tue, 07 Dec 2010 06:10:41 -0800 (PST) Received: from harpe.intellique.com (unknown [82.225.196.72]) by smtp4-g21.free.fr (Postfix) with ESMTP id 4CC694C80C9; Tue, 7 Dec 2010 15:10:34 +0100 (CET) Date: Tue, 7 Dec 2010 15:10:39 +0100 From: Emmanuel Florac To: blacknred Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: possible xfs corruption Subject: Re: possible xfs corruption Message-ID: <20101207151039.25d45cb5@harpe.intellique.com> In-Reply-To: <30395558.post@talk.nabble.com> References: <30395558.post@talk.nabble.com> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.16.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp4-g21.free.fr[212.27.42.4] X-Barracuda-Start-Time: 1291731044 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.82 X-Barracuda-Spam-Status: No, SCORE=-1.82 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA620b, MAILTO_TO_SPAM_ADDR X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48736 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 MAILTO_TO_SPAM_ADDR URI: Includes a link to a likely spammer email 0.20 BSF_SC0_SA620b Custom Rule SA620b X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Tue, 7 Dec 2010 03:49:49 -0800 (PST) blacknred =E9crivait: > I'm stuck with a storage issue on reboot. Initially doubted the > storage, but dmesg throws these errors. Now wondering whether this is > a fs issue? Any thoughts as to whats going on here? >=20 It looks like a part of the filesystem is physically missing. What is the underlying device? Apparently it's a SmartArray in some HP server, did you had a power failure?=20 --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From lists@nabble.com Tue Dec 7 09:09:18 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_TO_NO_BRKTS_FREEMAIL autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7F9H63167789 for ; Tue, 7 Dec 2010 09:09:18 -0600 X-ASG-Debug-ID: 1291734664-735600aa0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from kuber.nabble.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2E24D1CED62 for ; Tue, 7 Dec 2010 07:11:04 -0800 (PST) Received: from kuber.nabble.com (kuber.nabble.com [216.139.236.158]) by cuda.sgi.com with ESMTP id I4U6yPb5HWEvTut4 for ; Tue, 07 Dec 2010 07:11:04 -0800 (PST) Received: from isper.nabble.com ([192.168.236.156]) by kuber.nabble.com with esmtp (Exim 4.63) (envelope-from ) id 1PPzC4-0001fw-5W for xfs@oss.sgi.com; Tue, 07 Dec 2010 07:11:04 -0800 Message-ID: <30397173.post@talk.nabble.com> Date: Tue, 7 Dec 2010 07:11:04 -0800 (PST) From: blacknred To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: possible xfs corruption Subject: Re: possible xfs corruption In-Reply-To: <20101207151039.25d45cb5@harpe.intellique.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Nabble-From: leo1783@hotmail.co.uk References: <30395558.post@talk.nabble.com> <20101207151039.25d45cb5@harpe.intellique.com> X-Barracuda-Connect: kuber.nabble.com[216.139.236.158] X-Barracuda-Start-Time: 1291734665 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MAILTO_TO_SPAM_ADDR X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48740 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 MAILTO_TO_SPAM_ADDR URI: Includes a link to a likely spammer email X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Yes, It's a Smart Array in HP Proliant Server. No power failure, just upgraded the controller firmware and rebooted the server..... Emmanuel Florac wrote: >=20 > Le Tue, 7 Dec 2010 03:49:49 -0800 (PST) > blacknred =C3=A9crivait: >=20 >> I'm stuck with a storage issue on reboot. Initially doubted the >> storage, but dmesg throws these errors. Now wondering whether this is >> a fs issue? Any thoughts as to whats going on here? >>=20 >=20 > It looks like a part of the filesystem is physically missing. What is > the underlying device? Apparently it's a SmartArray in some HP server, > did you had a power failure?=20 >=20 > --=20 > ------------------------------------------------------------------------ > Emmanuel Florac | Direction technique > | Intellique > |=09 > | +33 1 78 94 84 02 > ------------------------------------------------------------------------ >=20 > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs >=20 >=20 --=20 View this message in context: http://old.nabble.com/possible-xfs-corruption= -tp30395558p30397173.html Sent from the Xfs - General mailing list archive at Nabble.com. From eflorac@intellique.com Tue Dec 7 09:40:43 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_74 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7Fehfj172239 for ; Tue, 7 Dec 2010 09:40:43 -0600 X-ASG-Debug-ID: 1291736545-735701520000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp4-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1F6961CEFC7 for ; Tue, 7 Dec 2010 07:42:29 -0800 (PST) Received: from smtp4-g21.free.fr (smtp4-g21.free.fr [212.27.42.4]) by cuda.sgi.com with ESMTP id bukVvV3Ym26ayXRm for ; Tue, 07 Dec 2010 07:42:29 -0800 (PST) Received: from harpe.intellique.com (unknown [82.225.196.72]) by smtp4-g21.free.fr (Postfix) with ESMTP id B57194C8180; Tue, 7 Dec 2010 16:42:21 +0100 (CET) Date: Tue, 7 Dec 2010 16:42:27 +0100 From: Emmanuel Florac To: blacknred Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: possible xfs corruption Subject: Re: possible xfs corruption Message-ID: <20101207164227.152cef01@harpe.intellique.com> In-Reply-To: <30397173.post@talk.nabble.com> References: <30395558.post@talk.nabble.com> <20101207151039.25d45cb5@harpe.intellique.com> <30397173.post@talk.nabble.com> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.16.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp4-g21.free.fr[212.27.42.4] X-Barracuda-Start-Time: 1291736551 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.82 X-Barracuda-Spam-Status: No, SCORE=-1.82 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA620b, MAILTO_TO_SPAM_ADDR X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48742 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 MAILTO_TO_SPAM_ADDR URI: Includes a link to a likely spammer email 0.20 BSF_SC0_SA620b Custom Rule SA620b X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Tue, 7 Dec 2010 07:11:04 -0800 (PST) blacknred =E9crivait: > Yes, It's a Smart Array in HP Proliant Server. > No power failure, just upgraded the controller firmware and rebooted > the server..... >=20 Hu oh, that stinks. Nothing in the firmware release notes? Do you have any other filesystem on this array?=20 First you could try to backup the filesystem metadata using xfs_metadump -o -w /dev/DEVICE outfile.meta It can be useful later in case things turn bad. Does it output any errors? IO errors particularly ? --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From lists@nabble.com Tue Dec 7 09:41:10 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_TO_NO_BRKTS_FREEMAIL autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7FfA17172276 for ; Tue, 7 Dec 2010 09:41:10 -0600 X-ASG-Debug-ID: 1291736577-3ce701010000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from kuber.nabble.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7F7DB1C9F690 for ; Tue, 7 Dec 2010 07:42:57 -0800 (PST) Received: from kuber.nabble.com (kuber.nabble.com [216.139.236.158]) by cuda.sgi.com with ESMTP id N5Fbyj51slMyuJZR for ; Tue, 07 Dec 2010 07:42:57 -0800 (PST) Received: from isper.nabble.com ([192.168.236.156]) by kuber.nabble.com with esmtp (Exim 4.63) (envelope-from ) id 1PPzgu-0004cE-TT for xfs@oss.sgi.com; Tue, 07 Dec 2010 07:42:56 -0800 Message-ID: <30397503.post@talk.nabble.com> Date: Tue, 7 Dec 2010 07:42:56 -0800 (PST) From: blacknred To: xfs@oss.sgi.com X-ASG-Orig-Subj: kernel panic-xfs errors Subject: kernel panic-xfs errors MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Nabble-From: leo1783@hotmail.co.uk X-Barracuda-Connect: kuber.nabble.com[216.139.236.158] X-Barracuda-Start-Time: 1291736577 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48742 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hi..... I get a kernel panic on my HP Proliant Server. here's trace: BUG: unable to handle kernel NULL pointer dereference at virtual address 00000052 printing eip: *pde = 2c731001 Oops: 0000 [#1] SMP CPU: 2 EIP: 0060:[] Tainted: GF VLI EFLAGS: 00010272 (2.6.33.3-85.fc13.x86_64 #1) EIP is at do_page_fault+0x245/0x617 eax: ec5ee000 ebx: 00000000 ecx: eb5de084 edx: 0000000e esi: 00013103 edi: ec5de0b3 ebp: 00000023 esp: ec5de024 ds: 008b es: 008b ss: 0078 Process bm (pid: 3210, ti=ec622000 task=ec5e3450 task.ti=ec6ee000) Stack: 00000000 00000000 ecd5e0a4 00000024 00000093 f7370000 00000007 00000000 ed6ef0a4 c0639569 00000000 0000000f 0000000b 00000000 00000000 00000000 00015106 c0629b9d 00000014 c0305b83 00000000 ec3d40f7 0000000e 00013006 Call Trace: [] do_page_fault+0x0/0x607 [] error_code+0x49/0x50 [] do_page_fault+0x204/00x607 [] elv_next_request+0x137/0x234 [] do_cciss_request+0x397/0x3a3 [cciss] [] do_page_fault+0x0/0x607 [] error_code+0x49/0x40 [] do_page_fault+0x215/0x607 [] deadline_set_request+0x26/0x57 [] do_page_fault+0x0/0x607 [] error_code+0x39/0x40 [] __down+0x2b/0xbb [] default_wake_function+0x0/0xc [] __down_failed+0x7/0xc [] .text.lock.xfs_buf+0x17/0x5f [xfs] [] xfs_buf_read_flags+0x48/0x76 [xfs] [] xfs_trans_read_buf+0x1bb/0x2c0 [xfs] [] xfs_btree_read_bufl+0x96/0xb3 [xfs] [] xfs_bmbt_lookup+0x135/0x478 [xfs] [] xfs_bmap_add_extent+0xd2b/0x1e30 [xfs] [] xfs_alloc_update+0x3a/0xbc [xfs] [] xfs_alloc_fixup_trees+0x217/0x29a [xfs] [] xfs_trans_log_buf+0x49/0x6c [xfs] [] xfs_alloc_search_busy+0x20/0xae [xfs] [] xfs_iext_bno_to_ext+0xd8/0x191 [xfs] [] kmem_zone_zalloc+0x1d/0x41 [xfs] [] xfs_bmapi+0x15fe/0x2016 [xfs] [] xfs_iext_bno_to_ext+0x48/0x191 [xfs] [] xfs_bmap_search_multi_extents+0x8a/0xc5 [xfs] [] xfs_iomap_write_allocate+0x29c/0x469 [xfs] [] lock_timer_base+0x15/0x2f [] del_timer+0x41/0x47 [] xfs_iomap+0x409/0x71d [xfs] [] xfs_map_blocks+0x29/0x52 [xfs] [] xfs_page_state_convert+0x37b/0xd2e [xfs] [] xfs_bmap_add_extent+0x1dcf/0x1e30 [xfs] [] xfs_bmap_search_multi_extents+0x8a/0xc5 [xfs] [] xfs_bmapi+0x272/0x2017 [xfs] [] xfs_bmapi+0x1853/0x2017 [xfs] [] find_get_pages_tag+0x40/0x75 [] xfs_vm_writepage+0x8f/0xd2 [xfs] [] mpage_writepages+0x1b7/0x310 [] xfs_vm_writepage+0x0/0xc4 [xfs] [] do_writepages+0x20/0x42 [] __writeback_single_inode+0x180/0x2af [] write_inode_now+0x67/0xa7 [] file_fsync+0xf/0x6c [] moddw_ioctl+0x420/0x679 [mod_dw] [] __cond_resched+0x16/0x54 [] do_ioctl+0x47/0x5d [] vfs_ioctl+0x47b/0x4d3 [] sys_ioctl+0x48/0x4f [] sysenter_past_esp+0x46/0x79 dmesg shows: XFS: bad magic number XFS: SB validate failed I rebooted the server, now xfs_repair comes clean. But the server has hung again after an hour. No panic this time, checked dmesg output and it again shows same XFS: bad magic number XFS: SB validate failed messages.. Any thoughts?? Thanks in advance David -- View this message in context: http://old.nabble.com/kernel-panic-xfs-errors-tp30397503p30397503.html Sent from the Xfs - General mailing list archive at Nabble.com. From eflorac@intellique.com Tue Dec 7 09:57:33 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7FvW1w175576 for ; Tue, 7 Dec 2010 09:57:33 -0600 X-ASG-Debug-ID: 1291737554-731301af0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp4-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 6CA5A1CEC33 for ; Tue, 7 Dec 2010 07:59:18 -0800 (PST) Received: from smtp4-g21.free.fr (smtp4-g21.free.fr [212.27.42.4]) by cuda.sgi.com with ESMTP id wLH9ftkdwLZUsaVo for ; Tue, 07 Dec 2010 07:59:18 -0800 (PST) Received: from harpe.intellique.com (unknown [82.225.196.72]) by smtp4-g21.free.fr (Postfix) with ESMTP id BCB7E4C80E1; Tue, 7 Dec 2010 16:59:10 +0100 (CET) Date: Tue, 7 Dec 2010 16:59:17 +0100 From: Emmanuel Florac To: blacknred Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors Message-ID: <20101207165917.0c96dd95@harpe.intellique.com> In-Reply-To: <30397503.post@talk.nabble.com> References: <30397503.post@talk.nabble.com> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.16.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp4-g21.free.fr[212.27.42.4] X-Barracuda-Start-Time: 1291737560 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.82 X-Barracuda-Spam-Status: No, SCORE=-1.82 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA620b, MAILTO_TO_SPAM_ADDR X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48744 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 MAILTO_TO_SPAM_ADDR URI: Includes a link to a likely spammer email 0.20 BSF_SC0_SA620b Custom Rule SA620b X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Tue, 7 Dec 2010 07:42:56 -0800 (PST) blacknred =E9crivait: > But the server has hung again after an hour. No panic this time, > checked dmesg output and it again > shows same=20 > XFS: bad magic number > XFS: SB validate failed=20 > messages.. Any thoughts?? >=20 What is the kernel version, distro, and xfs_progs? You didn't update anything but the controller firmware? Is the new firmware compatible with the previous driver? This one is intriguing : [] do_cciss_request+0x397/0x3a3 [cciss] --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From lists@nabble.com Tue Dec 7 11:18:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_TO_NO_BRKTS_FREEMAIL autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7HIUBH187790 for ; Tue, 7 Dec 2010 11:18:30 -0600 X-ASG-Debug-ID: 1291742417-3ca502670000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from kuber.nabble.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E31701C9FC8F for ; Tue, 7 Dec 2010 09:20:17 -0800 (PST) Received: from kuber.nabble.com (kuber.nabble.com [216.139.236.158]) by cuda.sgi.com with ESMTP id KZtkzx6xeB4stmff for ; Tue, 07 Dec 2010 09:20:17 -0800 (PST) Received: from isper.nabble.com ([192.168.236.156]) by kuber.nabble.com with esmtp (Exim 4.63) (envelope-from ) id 1PQ1D7-0005xH-6i for xfs@oss.sgi.com; Tue, 07 Dec 2010 09:20:17 -0800 Message-ID: <30398448.post@talk.nabble.com> Date: Tue, 7 Dec 2010 09:20:17 -0800 (PST) From: blacknred To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors In-Reply-To: <20101207165917.0c96dd95@harpe.intellique.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Nabble-From: leo1783@hotmail.co.uk References: <30397503.post@talk.nabble.com> <20101207165917.0c96dd95@harpe.intellique.com> X-Barracuda-Connect: kuber.nabble.com[216.139.236.158] X-Barracuda-Start-Time: 1291742417 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MAILTO_TO_SPAM_ADDR X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48750 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 MAILTO_TO_SPAM_ADDR URI: Includes a link to a likely spammer email X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean kernel-2.6.18-164.el5 rhel 5.0 xfs_progs ver: 2.9.4 I haven't updated the controller on this server, it just panicked while doing I/O [] do_cciss_request+0x397/0x3a3 [cciss] looks like the controller was wedged there? Emmanuel Florac wrote: >=20 > Le Tue, 7 Dec 2010 07:42:56 -0800 (PST) > blacknred =C3=A9crivait: >=20 >> But the server has hung again after an hour. No panic this time, >> checked dmesg output and it again >> shows same=20 >> XFS: bad magic number >> XFS: SB validate failed=20 >> messages.. Any thoughts?? >>=20 >=20 > What is the kernel version, distro, and xfs_progs? You didn't update > anything but the controller firmware? Is the new firmware compatible > with the previous driver? >=20 > This one is intriguing : >=20 > [] do_cciss_request+0x397/0x3a3 [cciss] >=20 > --=20 > ------------------------------------------------------------------------ > Emmanuel Florac | Direction technique > | Intellique > |=09 > | +33 1 78 94 84 02 > ------------------------------------------------------------------------ >=20 > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs >=20 >=20 --=20 View this message in context: http://old.nabble.com/kernel-panic-xfs-errors= -tp30397503p30398448.html Sent from the Xfs - General mailing list archive at Nabble.com. From lists@nabble.com Tue Dec 7 11:28:36 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,FREEMAIL_FROM, J_CHICKENPOX_74,T_TO_NO_BRKTS_FREEMAIL autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7HSatG189222 for ; Tue, 7 Dec 2010 11:28:36 -0600 X-ASG-Debug-ID: 1291743023-3cb9028e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from kuber.nabble.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id EBC9B1C9FD85 for ; Tue, 7 Dec 2010 09:30:23 -0800 (PST) Received: from kuber.nabble.com (kuber.nabble.com [216.139.236.158]) by cuda.sgi.com with ESMTP id nJ00jgujgPIC6EEU for ; Tue, 07 Dec 2010 09:30:23 -0800 (PST) Received: from isper.nabble.com ([192.168.236.156]) by kuber.nabble.com with esmtp (Exim 4.63) (envelope-from ) id 1PQ1Mt-0006nX-K7 for xfs@oss.sgi.com; Tue, 07 Dec 2010 09:30:23 -0800 Message-ID: <30398538.post@talk.nabble.com> Date: Tue, 7 Dec 2010 09:30:23 -0800 (PST) From: blacknred To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: possible xfs corruption Subject: Re: possible xfs corruption In-Reply-To: <20101207164227.152cef01@harpe.intellique.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Nabble-From: leo1783@hotmail.co.uk References: <30395558.post@talk.nabble.com> <20101207151039.25d45cb5@harpe.intellique.com> <30397173.post@talk.nabble.com> <20101207164227.152cef01@harpe.intellique.com> X-Barracuda-Connect: kuber.nabble.com[216.139.236.158] X-Barracuda-Start-Time: 1291743023 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MAILTO_TO_SPAM_ADDR X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48750 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 MAILTO_TO_SPAM_ADDR URI: Includes a link to a likely spammer email X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean It's all xfs..... and didn't see any I/O errors as well...except that dmesg is flooded with similar traces to one i posted.... Emmanuel Florac wrote: >=20 > Le Tue, 7 Dec 2010 07:11:04 -0800 (PST) > blacknred =C3=A9crivait: >=20 >> Yes, It's a Smart Array in HP Proliant Server. >> No power failure, just upgraded the controller firmware and rebooted >> the server..... >>=20 >=20 > Hu oh, that stinks. Nothing in the firmware release notes? Do you have > any other filesystem on this array?=20 >=20 > First you could try to backup the filesystem metadata using >=20 > xfs_metadump -o -w /dev/DEVICE outfile.meta >=20 > It can be useful later in case things turn bad. > Does it output any errors? IO errors particularly ? >=20 > --=20 > ------------------------------------------------------------------------ > Emmanuel Florac | Direction technique > | Intellique > |=09 > | +33 1 78 94 84 02 > ------------------------------------------------------------------------ >=20 > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs >=20 >=20 --=20 View this message in context: http://old.nabble.com/possible-xfs-corruption= -tp30395558p30398538.html Sent from the Xfs - General mailing list archive at Nabble.com. From eflorac@intellique.com Tue Dec 7 11:58:54 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7Hwsbe194335 for ; Tue, 7 Dec 2010 11:58:54 -0600 X-ASG-Debug-ID: 1291744834-1d3501220000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp4-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 46F841CF6C6 for ; Tue, 7 Dec 2010 10:00:35 -0800 (PST) Received: from smtp4-g21.free.fr (smtp4-g21.free.fr [212.27.42.4]) by cuda.sgi.com with ESMTP id BizM1J0JydViSYtp for ; Tue, 07 Dec 2010 10:00:35 -0800 (PST) Received: from harpe.intellique.com (unknown [82.225.196.72]) by smtp4-g21.free.fr (Postfix) with ESMTP id EB0BC4C81A4; Tue, 7 Dec 2010 19:00:30 +0100 (CET) Date: Tue, 7 Dec 2010 19:00:38 +0100 From: Emmanuel Florac To: blacknred Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors Message-ID: <20101207190038.61e9dbb7@harpe.intellique.com> In-Reply-To: <30398448.post@talk.nabble.com> References: <30397503.post@talk.nabble.com> <20101207165917.0c96dd95@harpe.intellique.com> <30398448.post@talk.nabble.com> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.16.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp4-g21.free.fr[212.27.42.4] X-Barracuda-Start-Time: 1291744838 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.82 X-Barracuda-Spam-Status: No, SCORE=-1.82 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA620b, MAILTO_TO_SPAM_ADDR X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48752 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 MAILTO_TO_SPAM_ADDR URI: Includes a link to a likely spammer email 0.20 BSF_SC0_SA620b Custom Rule SA620b X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Tue, 7 Dec 2010 09:20:17 -0800 (PST) blacknred =E9crivait: > [] do_cciss_request+0x397/0x3a3 [cciss] > looks like the controller was wedged there? >=20 Yes, apparently your controller wrote garbage at the beginning of the filesystem... you have lots of trouble with these controllers, has anything special happened? that's weird. You should try using a newer xfs_repair (> 3.x), for instance by booting from an Ubuntu 10.10 live CD, and see if it fares any better from there. --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From stan@hardwarefreak.com Tue Dec 7 12:14:07 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7IE72F196704 for ; Tue, 7 Dec 2010 12:14:07 -0600 X-ASG-Debug-ID: 1291745754-1d3501c30000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 183E61CFE4E for ; Tue, 7 Dec 2010 10:15:54 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id P6ctnKQk9F0NOil0 for ; Tue, 07 Dec 2010 10:15:54 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 494246C14E for ; Tue, 7 Dec 2010 12:15:54 -0600 (CST) Message-ID: <4CFE79DA.9080400@hardwarefreak.com> Date: Tue, 07 Dec 2010 12:15:54 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: possible xfs corruption Subject: Re: possible xfs corruption References: <30395558.post@talk.nabble.com> <20101207151039.25d45cb5@harpe.intellique.com> <30397173.post@talk.nabble.com> <20101207164227.152cef01@harpe.intellique.com> <30398538.post@talk.nabble.com> In-Reply-To: <30398538.post@talk.nabble.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1291745755 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0451 1.0000 -1.7306 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.13 X-Barracuda-Spam-Status: No, SCORE=-1.13 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48752 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean blacknred put forth on 12/7/2010 11:30 AM: > > It's all xfs..... and didn't see any I/O errors as well...except that dmesg > is flooded with similar traces to one i posted.... Out of the blue, one OP, with two Proliant servers having storage problems, within hours of one another, the same day? Long odds, that. Did you walk a mile, flat footed, on deep shag carpet, while wearing a wool sweater, in a room with zero humidity, then walk into the DC and touch each of these servers, or something? ;) -- Stan From stan@hardwarefreak.com Tue Dec 7 12:17:02 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7IH1av197241 for ; Tue, 7 Dec 2010 12:17:02 -0600 X-ASG-Debug-ID: 1291745929-3cde03410000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B713C1CA0A0D for ; Tue, 7 Dec 2010 10:18:49 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id PFSDrdEeJ9KqC9MP for ; Tue, 07 Dec 2010 10:18:49 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 27A686C14E for ; Tue, 7 Dec 2010 12:18:49 -0600 (CST) Message-ID: <4CFE7A89.2010307@hardwarefreak.com> Date: Tue, 07 Dec 2010 12:18:49 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors References: <30397503.post@talk.nabble.com> <20101207165917.0c96dd95@harpe.intellique.com> <30398448.post@talk.nabble.com> <20101207190038.61e9dbb7@harpe.intellique.com> In-Reply-To: <20101207190038.61e9dbb7@harpe.intellique.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1291745929 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.22 X-Barracuda-Spam-Status: No, SCORE=-1.22 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA620b, BSF_SC5_MJ1963, MAILTO_TO_SPAM_ADDR, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48752 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 MAILTO_TO_SPAM_ADDR URI: Includes a link to a likely spammer email 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 0.20 BSF_SC0_SA620b Custom Rule SA620b X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Emmanuel Florac put forth on 12/7/2010 12:00 PM: > Le Tue, 7 Dec 2010 09:20:17 -0800 (PST) > blacknred écrivait: > >> [] do_cciss_request+0x397/0x3a3 [cciss] >> looks like the controller was wedged there? >> > > Yes, apparently your controller wrote garbage at the beginning of the > filesystem... you have lots of trouble with these controllers, has > anything special happened? that's weird. > > You should try using a newer xfs_repair (> 3.x), for instance by booting > from an Ubuntu 10.10 live CD, and see if it fares any better from there. The answer for the one server is simple: back out the firmware--flash it with the previously installed version. BTW, what need prompted the new flash in the first place? I _never_ flash controller firmware unless absolutely necessary. You've demonstrated today why I practice that faith. -- Stan From michael.monnerie@is.it-management.at Tue Dec 7 13:31:12 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7JVBnR207746 for ; Tue, 7 Dec 2010 13:31:12 -0600 X-ASG-Debug-ID: 1291750376-332701380000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mailsrv14.zmi.at (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E26A4160F3F5 for ; Tue, 7 Dec 2010 11:32:56 -0800 (PST) Received: from mailsrv14.zmi.at (mailsrv1.zmi.at [212.69.164.54]) by cuda.sgi.com with ESMTP id tpIThEkXFI12uJuA for ; Tue, 07 Dec 2010 11:32:56 -0800 (PST) Received: from mailsrv.i.zmi.at (h081217106033.dyn.cm.kabsi.at [81.217.106.33]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client CN "mailsrv2.i.zmi.at", Issuer "power4u.zmi.at" (not verified)) by mailsrv14.zmi.at (Postfix) with ESMTPSA id 480EA144; Tue, 7 Dec 2010 20:32:55 +0100 (CET) Received: from saturn.localnet (saturn.i.zmi.at [10.72.27.2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mailsrv.i.zmi.at (Postfix) with ESMTPSA id 6E9B6401C3E; Tue, 7 Dec 2010 20:32:54 +0100 (CET) From: Michael Monnerie Organization: it-management http://it-management.at To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: possible xfs corruption Subject: Re: possible xfs corruption Date: Tue, 7 Dec 2010 20:32:53 +0100 User-Agent: KMail/1.13.5 (Linux/2.6.34.7-0.5-desktop; KDE/4.4.4; x86_64; ; ) Cc: blacknred References: <30395558.post@talk.nabble.com> <20101207151039.25d45cb5@harpe.intellique.com> <30397173.post@talk.nabble.com> In-Reply-To: <30397173.post@talk.nabble.com> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart7703918.QEWK9RTnrp"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <201012072032.54069@zmi.at> X-Barracuda-Connect: mailsrv1.zmi.at[212.69.164.54] X-Barracuda-Start-Time: 1291750377 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48757 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --nextPart7703918.QEWK9RTnrp Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable On Dienstag, 7. Dezember 2010 blacknred wrote: > Yes, It's a Smart Array in HP Proliant Server. > No power failure, just upgraded the controller firmware and rebooted > the server..... What Server, controller, and from which firmware version did you go to=20 which one? =2D-=20 mit freundlichen Gr=C3=BCssen, Michael Monnerie, Ing. BSc it-management Internet Services: Prot=C3=A9ger http://proteger.at [gesprochen: Prot-e-schee] Tel: +43 660 / 415 6531 // ****** Radiointerview zum Thema Spam ****** // http://www.it-podcast.at/archiv.html#podcast-100716 //=20 // Haus zu verkaufen: http://zmi.at/langegg/ --nextPart7703918.QEWK9RTnrp Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.15 (GNU/Linux) iEYEABECAAYFAkz+i+YACgkQzhSR9xwSCbTfOwCcDMY9VzesWwignv1DVKO1O42b VTYAoOjO0jRWFnJEjmtMCg2QFeL8bWDs =uAsw -----END PGP SIGNATURE----- --nextPart7703918.QEWK9RTnrp-- From eflorac@intellique.com Tue Dec 7 15:50:49 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7Lom7M228447 for ; Tue, 7 Dec 2010 15:50:49 -0600 X-ASG-Debug-ID: 1291758752-1e9e01410000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp3-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7BA121426BA0 for ; Tue, 7 Dec 2010 13:52:33 -0800 (PST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id us05kPch6PutdLK5 for ; Tue, 07 Dec 2010 13:52:33 -0800 (PST) Received: from galadriel.home (unknown [82.235.234.79]) by smtp3-g21.free.fr (Postfix) with ESMTP id 88E9EA62AC; Tue, 7 Dec 2010 22:52:28 +0100 (CET) Date: Tue, 7 Dec 2010 22:52:26 +0100 From: Emmanuel Florac To: Stan Hoeppner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors Message-ID: <20101207225226.55be2b4d@galadriel.home> In-Reply-To: <4CFE7A89.2010307@hardwarefreak.com> References: <30397503.post@talk.nabble.com> <20101207165917.0c96dd95@harpe.intellique.com> <30398448.post@talk.nabble.com> <20101207190038.61e9dbb7@harpe.intellique.com> <4CFE7A89.2010307@hardwarefreak.com> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp3-g21.free.fr[212.27.42.3] X-Barracuda-Start-Time: 1291758756 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48767 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Tue, 07 Dec 2010 12:18:49 -0600 vous =E9criviez: > The answer for the one server is simple: back out the firmware--flash > it with the previously installed version. >=20 > BTW, what need prompted the new flash in the first place? I _never_ > flash controller firmware unless absolutely necessary. You've > demonstrated today why I practice that faith. I've experienced myself some very convincing reasons, for instance a RAID array with a performance varying by 1000% with a new firmware. However the kernel panic occured on another that apparently wasn't firmware-flashed. --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From SRS0+8zW4+10+fromorbit.com=david@internode.on.net Tue Dec 7 16:08:27 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7M8QUg231574 for ; Tue, 7 Dec 2010 16:08:26 -0600 X-ASG-Debug-ID: 1291759812-270801d90000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 5CDB214260FE for ; Tue, 7 Dec 2010 14:10:13 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id iW0yk5sNTwfz01iR for ; Tue, 07 Dec 2010 14:10:13 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49149054-1927428 for multiple; Wed, 08 Dec 2010 08:40:11 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PQ5je-0007dr-0N; Wed, 08 Dec 2010 09:10:10 +1100 Date: Wed, 8 Dec 2010 09:10:09 +1100 From: Dave Chinner To: blacknred Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: possible xfs corruption Subject: Re: possible xfs corruption Message-ID: <20101207221009.GA29333@dastard> References: <30395558.post@talk.nabble.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <30395558.post@talk.nabble.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1291759814 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0058 1.0000 -1.9830 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.48 X-Barracuda-Spam-Status: No, SCORE=-1.48 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48769 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 07, 2010 at 03:49:49AM -0800, blacknred wrote: > > Hi... > > I'm stuck with a storage issue on reboot. Initially doubted the storage, but > dmesg throws these errors. Now wondering whether this is a fs issue? Any > thoughts as to whats going on here? > > > XFS: failed to locate log tail > XFS: log mount/recovery failed: error 117 > XFS: log mount failed > XFS mounting filesystem cciss/c0d0 > Filesystem "cciss/c0d0": XFS internal error xlog_clear_stale_blocks(2) at > line 1237 of file Which indicates that the head and/or the tail of the log are not valid. Can you provide the output of: # xfs_logprint -d /dev/cciss/c0d0 So we can see what the head/tail values are in the log? > /home/buildsvn/rpmbuild/BUILD/xfs-kmod-0.4/_kmod_build_PAE/xfs_log_recover.c. CentOS kernel? How old? Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+8zW4+10+fromorbit.com=david@internode.on.net Tue Dec 7 16:12:59 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7MCxTa232191 for ; Tue, 7 Dec 2010 16:12:59 -0600 X-ASG-Debug-ID: 1291760085-2c1302c20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 479BA1CA2F15 for ; Tue, 7 Dec 2010 14:14:46 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id ZLHrCStwSBJbsx1F for ; Tue, 07 Dec 2010 14:14:46 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49149753-1927428 for multiple; Wed, 08 Dec 2010 08:44:45 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PQ5o3-0007eO-MW; Wed, 08 Dec 2010 09:14:43 +1100 Date: Wed, 8 Dec 2010 09:14:43 +1100 From: Dave Chinner To: Tharindu Rukshan Bamunuarachchi Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs_count_page_state inside kswapd Subject: Re: xfs_count_page_state inside kswapd Message-ID: <20101207221443.GB29333@dastard> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1291760087 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0208 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48768 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 07, 2010 at 06:26:52PM +0530, Tharindu Rukshan Bamunuarachchi wrote: > Dear All, > > We got following oops in one of our SLES 11 server. This occurred inside > swapd and we running our server swap turned off.. > > Could this be memory corruption or possible old bug in code ? No idea - the SLES11 kernel is lots of non-standard stuff in it compared to mainline (e.g. the XFS code has DMAPI support) and you are running a kernel with Novell supported kernel modules loaded (all the IB stuff). Your best bet is to contact your SLES support representative to see if they know of such a problem... Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+8zW4+10+fromorbit.com=david@internode.on.net Tue Dec 7 16:24:16 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB7MOFv7234234 for ; Tue, 7 Dec 2010 16:24:15 -0600 X-ASG-Debug-ID: 1291760761-5aff00670000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0DBC914262B4 for ; Tue, 7 Dec 2010 14:26:01 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id M7tIUP3CZbkVnxYi for ; Tue, 07 Dec 2010 14:26:01 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49151090-1927428 for multiple; Wed, 08 Dec 2010 08:56:00 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PQ5yw-0007fb-6G; Wed, 08 Dec 2010 09:25:58 +1100 Date: Wed, 8 Dec 2010 09:25:58 +1100 From: Dave Chinner To: blacknred Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors Message-ID: <20101207222558.GC29333@dastard> References: <30397503.post@talk.nabble.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <30397503.post@talk.nabble.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1291760763 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48769 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 07, 2010 at 07:42:56AM -0800, blacknred wrote: > > Hi..... > > I get a kernel panic on my HP Proliant Server. > > here's trace: > > BUG: unable to handle kernel NULL pointer dereference at virtual address > 00000052 > printing eip: > *pde = 2c731001 > Oops: 0000 [#1] > SMP > > CPU: 2 > EIP: 0060:[] Tainted: GF VLI ^^^^^^^^^^^ You've done a forced module load. No guarantee your kernel is in any sane shape if you've done that.... > EFLAGS: 00010272 (2.6.33.3-85.fc13.x86_64 #1) > EIP is at do_page_fault+0x245/0x617 > eax: ec5ee000 ebx: 00000000 ecx: eb5de084 edx: 0000000e > esi: 00013103 edi: ec5de0b3 ebp: 00000023 esp: ec5de024 > ds: 008b es: 008b ss: 0078 > Process bm (pid: 3210, ti=ec622000 task=ec5e3450 task.ti=ec6ee000) > Stack: 00000000 00000000 ecd5e0a4 00000024 00000093 f7370000 00000007 > 00000000 > ed6ef0a4 c0639569 00000000 0000000f 0000000b 00000000 00000000 > 00000000 > 00015106 c0629b9d 00000014 c0305b83 00000000 ec3d40f7 0000000e > 00013006 > Call Trace: > [] do_page_fault+0x0/0x607 > [] error_code+0x49/0x50 > [] do_page_fault+0x204/00x607 > [] elv_next_request+0x137/0x234 > [] do_cciss_request+0x397/0x3a3 [cciss] > [] do_page_fault+0x0/0x607 > [] error_code+0x49/0x40 > [] do_page_fault+0x215/0x607 > [] deadline_set_request+0x26/0x57 > [] do_page_fault+0x0/0x607 > [] error_code+0x39/0x40 > [] __down+0x2b/0xbb > [] default_wake_function+0x0/0xc > [] __down_failed+0x7/0xc > [] .text.lock.xfs_buf+0x17/0x5f [xfs] > [] xfs_buf_read_flags+0x48/0x76 [xfs] > [] xfs_trans_read_buf+0x1bb/0x2c0 [xfs] > [] xfs_btree_read_bufl+0x96/0xb3 [xfs] > [] xfs_bmbt_lookup+0x135/0x478 [xfs] > [] xfs_bmap_add_extent+0xd2b/0x1e30 [xfs] > [] xfs_alloc_update+0x3a/0xbc [xfs] > [] xfs_alloc_fixup_trees+0x217/0x29a [xfs] > [] xfs_trans_log_buf+0x49/0x6c [xfs] > [] xfs_alloc_search_busy+0x20/0xae [xfs] > [] xfs_iext_bno_to_ext+0xd8/0x191 [xfs] > [] kmem_zone_zalloc+0x1d/0x41 [xfs] > [] xfs_bmapi+0x15fe/0x2016 [xfs] > [] xfs_iext_bno_to_ext+0x48/0x191 [xfs] > [] xfs_bmap_search_multi_extents+0x8a/0xc5 [xfs] > [] xfs_iomap_write_allocate+0x29c/0x469 [xfs] > [] lock_timer_base+0x15/0x2f > [] del_timer+0x41/0x47 > [] xfs_iomap+0x409/0x71d [xfs] > [] xfs_map_blocks+0x29/0x52 [xfs] > [] xfs_page_state_convert+0x37b/0xd2e [xfs] > [] xfs_bmap_add_extent+0x1dcf/0x1e30 [xfs] > [] xfs_bmap_search_multi_extents+0x8a/0xc5 [xfs] > [] xfs_bmapi+0x272/0x2017 [xfs] > [] xfs_bmapi+0x1853/0x2017 [xfs] > [] find_get_pages_tag+0x40/0x75 > [] xfs_vm_writepage+0x8f/0xd2 [xfs] > [] mpage_writepages+0x1b7/0x310 > [] xfs_vm_writepage+0x0/0xc4 [xfs] > [] do_writepages+0x20/0x42 > [] __writeback_single_inode+0x180/0x2af > [] write_inode_now+0x67/0xa7 > [] file_fsync+0xf/0x6c > [] moddw_ioctl+0x420/0x679 [mod_dw] > [] __cond_resched+0x16/0x54 > [] do_ioctl+0x47/0x5d > [] vfs_ioctl+0x47b/0x4d3 > [] sys_ioctl+0x48/0x4f > [] sysenter_past_esp+0x46/0x79 Strange failure. Hmmm - i386 arch and fedora - are you running with 4k stacks? If so, maybe it blew the stack... > > dmesg shows: > XFS: bad magic number > XFS: SB validate failed > > I rebooted the server, now xfs_repair comes clean. > > But the server has hung again after an hour. No panic this time, checked > dmesg output and it again > shows same > XFS: bad magic number > XFS: SB validate failed > messages.. Any thoughts?? What does this give you before and after the failure: # dd if= bs=512 count=1 | od -c Cheers, Dave. -- Dave Chinner david@fromorbit.com From lists@nabble.com Wed Dec 8 03:37:24 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_TO_NO_BRKTS_FREEMAIL autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB89bOC8091327 for ; Wed, 8 Dec 2010 03:37:24 -0600 X-ASG-Debug-ID: 1291801151-074e01500000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from kuber.nabble.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D3E241D34E0 for ; Wed, 8 Dec 2010 01:39:11 -0800 (PST) Received: from kuber.nabble.com (kuber.nabble.com [216.139.236.158]) by cuda.sgi.com with ESMTP id AaOlAr3OyY1orAEz for ; Wed, 08 Dec 2010 01:39:11 -0800 (PST) Received: from isper.nabble.com ([192.168.236.156]) by kuber.nabble.com with esmtp (Exim 4.63) (envelope-from ) id 1PQGUQ-0002dP-PC for xfs@oss.sgi.com; Wed, 08 Dec 2010 01:39:10 -0800 Message-ID: <30403823.post@talk.nabble.com> Date: Wed, 8 Dec 2010 01:39:10 -0800 (PST) From: blacknred To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors In-Reply-To: <20101207222558.GC29333@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Nabble-From: leo1783@hotmail.co.uk References: <30397503.post@talk.nabble.com> <20101207222558.GC29333@dastard> X-Barracuda-Connect: kuber.nabble.com[216.139.236.158] X-Barracuda-Start-Time: 1291801151 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48814 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean >You've done a forced module load. No guarantee your kernel is in any >sane shape if you've done that.... Agree, but I'm reasonably convinced that module isn't the issue, because it works fine with my other servers...... >Strange failure. Hmmm - i386 arch and fedora - are you running with 4k stacks? If so, maybe it blew the stack... i386 arch, rhel 5.0 ># dd if= bs=512 count=1 | od -c This is what i get now, but now server's been rebooted and running OK, what should i be expecting or rather what are we looking for in this output at point of failure? 1+0 records in 1+0 records out 0000000 X F S B \0 \0 020 \0 \0 \0 \0 \0 025 324 304 \0 512 bytes (512 B) copied0000020 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 0000040 330 k 004 8 A 365 F 023 221 035 215 E 277 + v 256 0000060 \0 \0 \0 \0 020 \0 \0 @ \0 \0 \0 \0 \0 \0 \0 200 , 3.8e-05 seconds, 13.5 MB/s 0000100 \0 \0 \0 \0 \0 \0 \0 201 \0 \0 \0 \0 \0 \0 \0 202 0000120 \0 \0 \0 001 \0 256 246 @ \0 \0 \0 \0 \0 \0 \0 0000140 \0 \0 200 \0 261 204 002 \0 \b \0 \0 002 \0 \0 \0 \0 0000160 \0 \0 \0 \0 \0 \0 \0 \0 \b \t \v 001 030 \0 \0 \0 0000200 \0 \0 \0 \0 \0 023 240 @ \0 \0 \0 \0 \0 004 264 344 0000220 \0 \0 \0 \0 \b 346 311 ( \0 \0 \0 \0 \0 \0 \0 \0 0000240 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 0000260 \0 \0 \0 \0 \0 \0 \0 002 \0 \0 \0 @ \0 \0 001 \0 0000300 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \b \0 \0 \0 \b 0000320 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 * 0001000 >why did I flash the controller I was on 5.22 fw version which has a known 'lockup' issue which is fixed in 7.x ver. This is a critical fix. So initially i was thinking the lockup caused the xfs errors in dmesg on the panicked server. But now its hung with the 7.x fw as well and same error shows in dmesg which makes me worried about the fs more.... Dave Chinner wrote: > > On Tue, Dec 07, 2010 at 07:42:56AM -0800, blacknred wrote: >> >> Hi..... >> >> I get a kernel panic on my HP Proliant Server. >> >> here's trace: >> >> BUG: unable to handle kernel NULL pointer dereference at virtual address >> 00000052 >> printing eip: >> *pde = 2c731001 >> Oops: 0000 [#1] >> SMP >> >> CPU: 2 >> EIP: 0060:[] Tainted: GF VLI > ^^^^^^^^^^^ > > You've done a forced module load. No guarantee your kernel is in any > sane shape if you've done that.... > >> EFLAGS: 00010272 (2.6.33.3-85.fc13.x86_64 #1) >> EIP is at do_page_fault+0x245/0x617 >> eax: ec5ee000 ebx: 00000000 ecx: eb5de084 edx: 0000000e >> esi: 00013103 edi: ec5de0b3 ebp: 00000023 esp: ec5de024 >> ds: 008b es: 008b ss: 0078 >> Process bm (pid: 3210, ti=ec622000 task=ec5e3450 task.ti=ec6ee000) >> Stack: 00000000 00000000 ecd5e0a4 00000024 00000093 f7370000 00000007 >> 00000000 >> ed6ef0a4 c0639569 00000000 0000000f 0000000b 00000000 00000000 >> 00000000 >> 00015106 c0629b9d 00000014 c0305b83 00000000 ec3d40f7 0000000e >> 00013006 >> Call Trace: >> [] do_page_fault+0x0/0x607 >> [] error_code+0x49/0x50 >> [] do_page_fault+0x204/00x607 >> [] elv_next_request+0x137/0x234 >> [] do_cciss_request+0x397/0x3a3 [cciss] >> [] do_page_fault+0x0/0x607 >> [] error_code+0x49/0x40 >> [] do_page_fault+0x215/0x607 >> [] deadline_set_request+0x26/0x57 >> [] do_page_fault+0x0/0x607 >> [] error_code+0x39/0x40 >> [] __down+0x2b/0xbb >> [] default_wake_function+0x0/0xc >> [] __down_failed+0x7/0xc >> [] .text.lock.xfs_buf+0x17/0x5f [xfs] >> [] xfs_buf_read_flags+0x48/0x76 [xfs] >> [] xfs_trans_read_buf+0x1bb/0x2c0 [xfs] >> [] xfs_btree_read_bufl+0x96/0xb3 [xfs] >> [] xfs_bmbt_lookup+0x135/0x478 [xfs] >> [] xfs_bmap_add_extent+0xd2b/0x1e30 [xfs] >> [] xfs_alloc_update+0x3a/0xbc [xfs] >> [] xfs_alloc_fixup_trees+0x217/0x29a [xfs] >> [] xfs_trans_log_buf+0x49/0x6c [xfs] >> [] xfs_alloc_search_busy+0x20/0xae [xfs] >> [] xfs_iext_bno_to_ext+0xd8/0x191 [xfs] >> [] kmem_zone_zalloc+0x1d/0x41 [xfs] >> [] xfs_bmapi+0x15fe/0x2016 [xfs] >> [] xfs_iext_bno_to_ext+0x48/0x191 [xfs] >> [] xfs_bmap_search_multi_extents+0x8a/0xc5 [xfs] >> [] xfs_iomap_write_allocate+0x29c/0x469 [xfs] >> [] lock_timer_base+0x15/0x2f >> [] del_timer+0x41/0x47 >> [] xfs_iomap+0x409/0x71d [xfs] >> [] xfs_map_blocks+0x29/0x52 [xfs] >> [] xfs_page_state_convert+0x37b/0xd2e [xfs] >> [] xfs_bmap_add_extent+0x1dcf/0x1e30 [xfs] >> [] xfs_bmap_search_multi_extents+0x8a/0xc5 [xfs] >> [] xfs_bmapi+0x272/0x2017 [xfs] >> [] xfs_bmapi+0x1853/0x2017 [xfs] >> [] find_get_pages_tag+0x40/0x75 >> [] xfs_vm_writepage+0x8f/0xd2 [xfs] >> [] mpage_writepages+0x1b7/0x310 >> [] xfs_vm_writepage+0x0/0xc4 [xfs] >> [] do_writepages+0x20/0x42 >> [] __writeback_single_inode+0x180/0x2af >> [] write_inode_now+0x67/0xa7 >> [] file_fsync+0xf/0x6c >> [] moddw_ioctl+0x420/0x679 [mod_dw] >> [] __cond_resched+0x16/0x54 >> [] do_ioctl+0x47/0x5d >> [] vfs_ioctl+0x47b/0x4d3 >> [] sys_ioctl+0x48/0x4f >> [] sysenter_past_esp+0x46/0x79 > > Strange failure. Hmmm - i386 arch and fedora - are you running with > 4k stacks? If so, maybe it blew the stack... > >> >> dmesg shows: >> XFS: bad magic number >> XFS: SB validate failed >> >> I rebooted the server, now xfs_repair comes clean. >> >> But the server has hung again after an hour. No panic this time, checked >> dmesg output and it again >> shows same >> XFS: bad magic number >> XFS: SB validate failed >> messages.. Any thoughts?? > > What does this give you before and after the failure: > > # dd if= bs=512 count=1 | od -c > > Cheers, > > Dave. > -- > Dave Chinner > david@fromorbit.com > > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs > > -- View this message in context: http://old.nabble.com/kernel-panic-xfs-errors-tp30397503p30403823.html Sent from the Xfs - General mailing list archive at Nabble.com. From eflorac@intellique.com Wed Dec 8 04:55:40 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB8Atei9106466 for ; Wed, 8 Dec 2010 04:55:40 -0600 X-ASG-Debug-ID: 1291805845-1de2006e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp4-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 42EFC1CA59C7 for ; Wed, 8 Dec 2010 02:57:26 -0800 (PST) Received: from smtp4-g21.free.fr (smtp4-g21.free.fr [212.27.42.4]) by cuda.sgi.com with ESMTP id fI1CNF4dHqnLMPXY for ; Wed, 08 Dec 2010 02:57:26 -0800 (PST) Received: from harpe.intellique.com (unknown [82.225.196.72]) by smtp4-g21.free.fr (Postfix) with ESMTP id 723284C81A3; Wed, 8 Dec 2010 11:57:21 +0100 (CET) Date: Wed, 8 Dec 2010 11:57:24 +0100 From: Emmanuel Florac To: blacknred Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors Message-ID: <20101208115724.0b2c210a@harpe.intellique.com> In-Reply-To: <30403823.post@talk.nabble.com> References: <30397503.post@talk.nabble.com> <20101207222558.GC29333@dastard> <30403823.post@talk.nabble.com> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.16.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp4-g21.free.fr[212.27.42.4] X-Barracuda-Start-Time: 1291805848 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.82 X-Barracuda-Spam-Status: No, SCORE=-1.82 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA620b, MAILTO_TO_SPAM_ADDR X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48820 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 MAILTO_TO_SPAM_ADDR URI: Includes a link to a likely spammer email 0.20 BSF_SC0_SA620b Custom Rule SA620b X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Wed, 8 Dec 2010 01:39:10 -0800 (PST) blacknred =E9crivait: > But now its hung with the 7.x fw as well and same error shows in > dmesg which makes me worried about the fs more.... >=20 Maybe there's a remaining hidden corruption. Could you try with latest xfs_repair ? --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From lists@nabble.com Wed Dec 8 07:59:40 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_TO_NO_BRKTS_FREEMAIL autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB8DxeTh125525 for ; Wed, 8 Dec 2010 07:59:40 -0600 X-ASG-Debug-ID: 1291816887-2c8401580000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from kuber.nabble.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 21176152A356 for ; Wed, 8 Dec 2010 06:01:27 -0800 (PST) Received: from kuber.nabble.com (kuber.nabble.com [216.139.236.158]) by cuda.sgi.com with ESMTP id 3GOiO1YTHcoNa4Ay for ; Wed, 08 Dec 2010 06:01:27 -0800 (PST) Received: from isper.nabble.com ([192.168.236.156]) by kuber.nabble.com with esmtp (Exim 4.63) (envelope-from ) id 1PQKaE-0004m6-IQ for xfs@oss.sgi.com; Wed, 08 Dec 2010 06:01:26 -0800 Message-ID: <30405587.post@talk.nabble.com> Date: Wed, 8 Dec 2010 06:01:26 -0800 (PST) From: blacknred To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors In-Reply-To: <20101208115724.0b2c210a@harpe.intellique.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Nabble-From: leo1783@hotmail.co.uk References: <30397503.post@talk.nabble.com> <20101207222558.GC29333@dastard> <30403823.post@talk.nabble.com> <20101208115724.0b2c210a@harpe.intellique.com> X-Barracuda-Connect: kuber.nabble.com[216.139.236.158] X-Barracuda-Start-Time: 1291816888 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MAILTO_TO_SPAM_ADDR X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48831 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 MAILTO_TO_SPAM_ADDR URI: Includes a link to a likely spammer email X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean >Yes, apparently your controller wrote garbage at the beginning of the >filesystem... on that, just wondering if you could provide more info.....=20 As in -is controller writing data in a different location which is not intended to be written to? Or is it case of writing incorrect data causing corruption?.... or could it be an application sw thats gone rogue? but that's a long shot, isn't it.... Emmanuel Florac wrote: >=20 > Le Wed, 8 Dec 2010 01:39:10 -0800 (PST) > blacknred =C3=A9crivait: >=20 >> But now its hung with the 7.x fw as well and same error shows in >> dmesg which makes me worried about the fs more.... >>=20 >=20 > Maybe there's a remaining hidden corruption. Could you try with latest > xfs_repair ? >=20 > --=20 > ------------------------------------------------------------------------ > Emmanuel Florac | Direction technique > | Intellique > |=09 > | +33 1 78 94 84 02 > ------------------------------------------------------------------------ >=20 > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs >=20 >=20 --=20 View this message in context: http://old.nabble.com/kernel-panic-xfs-errors= -tp30397503p30405587.html Sent from the Xfs - General mailing list archive at Nabble.com. From eflorac@intellique.com Wed Dec 8 08:32:44 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB8EWhNi127062 for ; Wed, 8 Dec 2010 08:32:44 -0600 X-ASG-Debug-ID: 1291818869-495b034b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp4-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3B39F1D4211 for ; Wed, 8 Dec 2010 06:34:30 -0800 (PST) Received: from smtp4-g21.free.fr (smtp4-g21.free.fr [212.27.42.4]) by cuda.sgi.com with ESMTP id 4iRW93YAWRhjG0GC for ; Wed, 08 Dec 2010 06:34:30 -0800 (PST) Received: from harpe.intellique.com (unknown [82.225.196.72]) by smtp4-g21.free.fr (Postfix) with ESMTP id 652654C8123; Wed, 8 Dec 2010 15:34:25 +0100 (CET) Date: Wed, 8 Dec 2010 15:34:30 +0100 From: Emmanuel Florac To: blacknred Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors Message-ID: <20101208153430.3f5831b3@harpe.intellique.com> In-Reply-To: <30405587.post@talk.nabble.com> References: <30397503.post@talk.nabble.com> <20101207222558.GC29333@dastard> <30403823.post@talk.nabble.com> <20101208115724.0b2c210a@harpe.intellique.com> <30405587.post@talk.nabble.com> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.16.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp4-g21.free.fr[212.27.42.4] X-Barracuda-Start-Time: 1291818872 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.82 X-Barracuda-Spam-Status: No, SCORE=-1.82 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA620b, MAILTO_TO_SPAM_ADDR X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48834 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 MAILTO_TO_SPAM_ADDR URI: Includes a link to a likely spammer email 0.20 BSF_SC0_SA620b Custom Rule SA620b X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Wed, 8 Dec 2010 06:01:26 -0800 (PST) blacknred =E9crivait: > As in -is controller writing data in a different location which is not > intended to be written to? > Or is it case of writing incorrect data causing corruption?.... >=20 This: XFS: bad magic number XFS: SB validate failed=20 Seems to indicate that the beginning of the filesystem was somehow corrupted. Just like the log was apparently truncated on the other server. That's why I though that you had a power failure and that an incomplete write operation was the culprit. --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From jensen_lorn@ns2.pagdigit.com.ar Wed Dec 8 10:15:58 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: **** X-Spam-Status: No, score=4.0 required=5.0 tests=BAYES_99 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB8GFwvq131771 for ; Wed, 8 Dec 2010 10:15:58 -0600 X-ASG-Debug-ID: 1291825064-3b7b01f00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from paginadigital.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id BDF6B1CA6D58 for ; Wed, 8 Dec 2010 08:17:45 -0800 (PST) Received: from paginadigital.net (ns2.pagdigit.com.ar [190.111.202.203]) by cuda.sgi.com with ESMTP id 0NRnbe0sCUYDwoL6 for ; 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c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=qT2TiwH9N46XtBcC5+Kkj4z0Cipq3HYqLt4wkTecIGm9o0gfGpwhXPN02SSIHF050x 9NyGE/DRByXQwjhnkCMyhjX2JwJD6M659Ya9RdkZNa6t/H+yQQ5rRgmE3xnsRvAamziX T1WnKX8z2xdji9Gy3+cYQjCVe6RRAOP4EKmV4= MIME-Version: 1.0 Received: by 10.213.30.20 with SMTP id s20mr9975063ebc.16.1291836748617; Wed, 08 Dec 2010 11:32:28 -0800 (PST) Received: by 10.213.33.146 with HTTP; Wed, 8 Dec 2010 11:32:28 -0800 (PST) Date: Wed, 8 Dec 2010 20:32:28 +0100 Message-ID: X-ASG-Orig-Subj: xfs tuning for a 830 GB partition (mkfs.xfs options) Subject: xfs tuning for a 830 GB partition (mkfs.xfs options) From: Abel Coto To: xfs@oss.sgi.com Content-Type: multipart/alternative; boundary=000e0cd1e32a82577f0496eb2e94 X-Barracuda-Connect: mail-ey0-f179.google.com[209.85.215.179] X-Barracuda-Start-Time: 1291836751 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.61 X-Barracuda-Spam-Status: No, SCORE=-1.61 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE, SUBJECT_FUZZY_TION X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48853 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.41 SUBJECT_FUZZY_TION Attempt to obfuscate words in Subject: -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --000e0cd1e32a82577f0496eb2e94 Content-Type: text/plain; charset=ISO-8859-1 I want to create a 830 GB partition, to mount as /home in my Centos 5.4 workstation. Actually i have /home not mounted ,so i would have to create the new partition in the lvm,format it and use rsync to copy /home directory to it. for a 830 GB partition that i will use to save my data in general and also 3d / CG projects and renders once finished them what agcount value should be used. I have read that mkfs default option creates 1 allocation group each 4G , so i understand that for a 830 GB partition agcount should be 208. It is this correct ? so i would use for format the partition mkfs.xfs -l lazy-count=1,version=2,size=128m -i attr=2 -d agcount=208 -L VolumeName I have read that some people instead use a 8GB allocation size , and agcount Size partition / 8 GB (in my case 104) , but i don't know if that would be good , as would result in less allocation groups. i understand if agcount > 208 (for example 416 ) , the allocation size (2GB for agcount=416) would be less than 4 GB , to have in total 830 GB. I have read that too much allocation groups are bad , but i don't now if 416 are too much for a 830 GB partition (and shoukd use 208 to 300) or not. I will mount the partition with logbufs=8. (i use a 128m journal and logbufs=8 to improve a bit deleting performance). I will perhaps use noatime too ,but i have to see if my backup app, uses atime or not. I have another 1,5 TB HDD where i want to create a 350 GB xfs partition to save the 3d projects and render output when working with the 3d software i use (Maya 2011). My thoughts are to use /home to save both music , photography,isos,etc also of finished 3d / cg work and iso dvd / tutorials and video-tutorials ,and this 350 GB partition use it only for data and projects that i am still working with,and once finished copy to /home. for this partition , that will handle mostly big files (500 MB to 2-3 GB at least) what mkfs.xfs options should i use ? something like: mkfs.xfs -l lazy-count=1,version=2,size=128m -i attr=2 -d agcount=90 -L VolumeName (350/4 --> 88) I prefer to have a separate partition to save projects at least when i am working with them , although 3d modelling is not too much filesystem bounded , and then copy it to /home , as i think having a good backup strategy shoud not be a problem to have my music and data along with 3d work finished in the same partition (3d is for me a hobby,that i like a lot but a hobby) I will have to compile a custom kernel from kernel.org because my centos kernel is 2.6.18,and there is no higher one available, only compiling it, but this shouldn't be a problem. --000e0cd1e32a82577f0496eb2e94 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable I want to create a 830 GB partition, to mount as /home in my Centos 5.4 wor= kstation.

Actually i have /home not mounted ,so i would have to cre= ate the new partition in the lvm,format it and use rsync to copy /home dire= ctory to it.

for a 830 GB partition that i will use to save my data in general and a= lso 3d / CG projects and renders once finished them what agcount value shou= ld be used. I have read that mkfs default option creates 1 allocation group= each 4G , so i understand that for a 830 GB partition agcount should be 20= 8.

It is this correct ?

so i would use for format the partition
mkfs.xfs -l lazy-count=3D1,version=3D2,size=3D128m -i attr=3D2 -d agc= ount=3D208 -L VolumeName <dev>

I have read that some people in= stead use a 8GB allocation size , and agcount Size partition / 8 GB (in my = case 104) , but i don't know if that would be good , as would result in= less allocation groups.

i understand if agcount > 208=A0 (for example 416 ) , the allocation= size (2GB for agcount=3D416) would be less than 4 GB , to have in total 83= 0 GB.

I have read that too much allocation groups are bad , but i do= n't now if 416 are=A0 too much for a 830 GB partition (and shoukd use 2= 08 to 300) or not.

I will mount the partition with logbufs=3D8. (i use a 128m journal and = logbufs=3D8 to improve a bit deleting performance). I will perhaps use noat= ime too ,but i have to see if my backup app, uses atime or not.


I have another 1,5 TB HDD where i want to create a 350 GB xfs partition to = save the 3d projects and render output when working with the 3d software i = use (Maya 2011). My thoughts are to use /home to save both music , photogra= phy,isos,etc also of finished 3d / cg work and iso dvd / tutorials and vide= o-tutorials ,and this 350 GB partition use it only for data and projects th= at i am still working with,and once finished copy to /home.

for this partition , that will handle mostly big files (500 MB to 2-3 G= B at least) what mkfs.xfs options should i use ?

something like:
=
mkfs.xfs -l lazy-count=3D1,version=3D2,size=3D128m -i attr=3D2 -d agcou= nt=3D90 -L VolumeName <dev>=A0 (350/4 --> 88)

I prefer to have a separate partition to save projects at least when i = am working with them , although 3d modelling is not too much filesystem bou= nded , and then copy it to /home , as i think having a good backup strategy= shoud not be a problem to have my music and data along with 3d work finish= ed in the same partition (3d is for me a hobby,that i like a lot but a hobb= y)

I will have to compile a custom kernel from kernel.org because my centos kernel is 2.6.18,and there is no higher= one available, only compiling it, but this shouldn't be a problem.
--000e0cd1e32a82577f0496eb2e94-- From eparis@redhat.com Wed Dec 8 13:46:02 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.5 required=5.0 tests=BAYES_00,J_CHICKENPOX_25, J_CHICKENPOX_26,J_CHICKENPOX_66,J_CHICKENPOX_73 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB8Jk1bD141667 for ; Wed, 8 Dec 2010 13:46:02 -0600 X-ASG-Debug-ID: 1291837669-1e1800ed0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A8AE81CA7B05; Wed, 8 Dec 2010 11:47:49 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id yfFhfqanUD4ZiYA6; Wed, 08 Dec 2010 11:47:49 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oB8Jk1lX031193 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 8 Dec 2010 14:46:01 -0500 Received: from paris.rdu.redhat.com (paris.rdu.redhat.com [10.11.231.241]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oB8Jjqe9004807; Wed, 8 Dec 2010 14:45:52 -0500 From: Eric Paris X-ASG-Orig-Subj: [PATCH] fs/vfs/security: pass last path component to LSM on inode creation Subject: [PATCH] fs/vfs/security: pass last path component to LSM on inode creation To: xfs-masters@oss.sgi.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, cluster-devel@redhat.com, linux-mtd@lists.infradead.org, jfs-discussion@lists.sourceforge.net, ocfs2-devel@oss.oracle.com, reiserfs-devel@vger.kernel.org, xfs@oss.sgi.com, linux-mm@kvack.org, linux-security-module@vger.kernel.org Cc: chris.mason@oracle.com, jack@suse.cz, akpm@linux-foundation.org, adilger.kernel@dilger.ca, tytso@mit.edu, swhiteho@redhat.com, dwmw2@infradead.org, shaggy@linux.vnet.ibm.com, mfasheh@suse.com, joel.becker@oracle.com, aelder@sgi.com, hughd@google.com, jmorris@namei.org, sds@tycho.nsa.gov, eparis@parisplace.org, hch@lst.de, dchinner@redhat.com, viro@zeniv.linux.org.uk, tao.ma@oracle.com, shemminger@vyatta.com, jeffm@suse.com, serue@us.ibm.com, paul.moore@hp.com, penguin-kernel@I-love.SAKURA.ne.jp, casey@schaufler-ca.com, kees.cook@canonical.com, dhowells@redhat.com Date: Wed, 08 Dec 2010 14:45:27 -0500 Message-ID: <20101208194527.13537.77202.stgit@paris.rdu.redhat.com> User-Agent: StGIT/0.14.3 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.67 on 10.5.11.11 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291837670 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean SELinux would like to implement a new labeling behavior of newly created inodes. We currently label new inodes based on the parent and the creating process. This new behavior would also take into account the name of the new object when deciding the new label. This is not the (supposed) full path, just the last component of the path. This is very useful because creating /etc/shadow is different than creating /etc/passwd but the kernel hooks are unable to differentiate these operations. We currently require that userspace realize it is doing some difficult operation like that and than userspace jumps through SELinux hoops to get things set up correctly. This patch does not implement new behavior, that is obviously contained in a seperate SELinux patch, but it does pass the needed name down to the correct LSM hook. If no such name exists it is fine to pass NULL. Signed-off-by: Eric Paris --- fs/btrfs/inode.c | 13 +++++++------ fs/btrfs/xattr.c | 6 ++++-- fs/btrfs/xattr.h | 3 ++- fs/ext2/ext2.h | 2 +- fs/ext2/ialloc.c | 5 +++-- fs/ext2/namei.c | 8 ++++---- fs/ext2/xattr.h | 6 ++++-- fs/ext2/xattr_security.c | 5 +++-- fs/ext3/ialloc.c | 5 +++-- fs/ext3/namei.c | 8 ++++---- fs/ext3/xattr.h | 4 ++-- fs/ext3/xattr_security.c | 5 +++-- fs/ext4/ialloc.c | 2 +- fs/ext4/xattr.h | 4 ++-- fs/ext4/xattr_security.c | 5 +++-- fs/gfs2/inode.c | 7 ++++--- fs/jffs2/dir.c | 9 ++++----- fs/jffs2/nodelist.h | 2 +- fs/jffs2/security.c | 5 +++-- fs/jffs2/write.c | 18 ++++++++++-------- fs/jffs2/xattr.h | 5 +++-- fs/jfs/jfs_xattr.h | 5 +++-- fs/jfs/namei.c | 8 ++++---- fs/jfs/xattr.c | 6 ++++-- fs/ocfs2/namei.c | 4 ++-- fs/ocfs2/refcounttree.c | 3 ++- fs/ocfs2/xattr.c | 10 ++++++---- fs/ocfs2/xattr.h | 4 +++- fs/reiserfs/namei.c | 9 +++++---- fs/reiserfs/xattr_security.c | 3 ++- fs/xfs/linux-2.6/xfs_iops.c | 9 +++++---- include/linux/ext3_fs.h | 3 ++- include/linux/reiserfs_xattr.h | 2 ++ include/linux/security.h | 9 +++++++-- mm/shmem.c | 9 +++++---- security/capability.c | 3 ++- security/security.c | 6 ++++-- security/selinux/hooks.c | 5 +++-- security/smack/smack_lsm.c | 5 ++++- 39 files changed, 136 insertions(+), 94 deletions(-) diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c index 8039390..ffc6e15 100644 --- a/fs/btrfs/inode.c +++ b/fs/btrfs/inode.c @@ -90,13 +90,14 @@ static noinline int cow_file_range(struct inode *inode, unsigned long *nr_written, int unlock); static int btrfs_init_inode_security(struct btrfs_trans_handle *trans, - struct inode *inode, struct inode *dir) + struct inode *inode, struct inode *dir, + const struct qstr *qstr) { int err; err = btrfs_init_acl(trans, inode, dir); if (!err) - err = btrfs_xattr_security_init(trans, inode, dir); + err = btrfs_xattr_security_init(trans, inode, dir, qstr); return err; } @@ -4675,7 +4676,7 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry, if (IS_ERR(inode)) goto out_unlock; - err = btrfs_init_inode_security(trans, inode, dir); + err = btrfs_init_inode_security(trans, inode, dir, &dentry->d_name); if (err) { drop_inode = 1; goto out_unlock; @@ -4736,7 +4737,7 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry, if (IS_ERR(inode)) goto out_unlock; - err = btrfs_init_inode_security(trans, inode, dir); + err = btrfs_init_inode_security(trans, inode, dir, &dentry->d_name); if (err) { drop_inode = 1; goto out_unlock; @@ -4864,7 +4865,7 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) drop_on_err = 1; - err = btrfs_init_inode_security(trans, inode, dir); + err = btrfs_init_inode_security(trans, inode, dir, &dentry->d_name); if (err) goto out_fail; @@ -6940,7 +6941,7 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry, if (IS_ERR(inode)) goto out_unlock; - err = btrfs_init_inode_security(trans, inode, dir); + err = btrfs_init_inode_security(trans, inode, dir, &dentry->d_name); if (err) { drop_inode = 1; goto out_unlock; diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c index 698fdd2..3338a7e 100644 --- a/fs/btrfs/xattr.c +++ b/fs/btrfs/xattr.c @@ -352,7 +352,8 @@ int btrfs_removexattr(struct dentry *dentry, const char *name) } int btrfs_xattr_security_init(struct btrfs_trans_handle *trans, - struct inode *inode, struct inode *dir) + struct inode *inode, struct inode *dir, + const struct qstr *qstr) { int err; size_t len; @@ -360,7 +361,8 @@ int btrfs_xattr_security_init(struct btrfs_trans_handle *trans, char *suffix; char *name; - err = security_inode_init_security(inode, dir, &suffix, &value, &len); + err = security_inode_init_security(inode, dir, qstr, &suffix, &value, + &len); if (err) { if (err == -EOPNOTSUPP) return 0; diff --git a/fs/btrfs/xattr.h b/fs/btrfs/xattr.h index 7a43fd6..b3cc803 100644 --- a/fs/btrfs/xattr.h +++ b/fs/btrfs/xattr.h @@ -37,6 +37,7 @@ extern int btrfs_setxattr(struct dentry *dentry, const char *name, extern int btrfs_removexattr(struct dentry *dentry, const char *name); extern int btrfs_xattr_security_init(struct btrfs_trans_handle *trans, - struct inode *inode, struct inode *dir); + struct inode *inode, struct inode *dir, + const struct qstr *qstr); #endif /* __XATTR__ */ diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h index 6346a2a..1b48c33 100644 --- a/fs/ext2/ext2.h +++ b/fs/ext2/ext2.h @@ -110,7 +110,7 @@ extern struct ext2_dir_entry_2 * ext2_dotdot (struct inode *, struct page **); extern void ext2_set_link(struct inode *, struct ext2_dir_entry_2 *, struct page *, struct inode *, int); /* ialloc.c */ -extern struct inode * ext2_new_inode (struct inode *, int); +extern struct inode * ext2_new_inode (struct inode *, int, const struct qstr *); extern void ext2_free_inode (struct inode *); extern unsigned long ext2_count_free_inodes (struct super_block *); extern void ext2_check_inodes_bitmap (struct super_block *); diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c index ad70479..ee9ed31 100644 --- a/fs/ext2/ialloc.c +++ b/fs/ext2/ialloc.c @@ -429,7 +429,8 @@ found: return group; } -struct inode *ext2_new_inode(struct inode *dir, int mode) +struct inode *ext2_new_inode(struct inode *dir, int mode, + const struct qstr *qstr) { struct super_block *sb; struct buffer_head *bitmap_bh = NULL; @@ -585,7 +586,7 @@ got: if (err) goto fail_free_drop; - err = ext2_init_security(inode,dir); + err = ext2_init_security(inode, dir, qstr); if (err) goto fail_free_drop; diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c index f8aecd2..368d704 100644 --- a/fs/ext2/namei.c +++ b/fs/ext2/namei.c @@ -104,7 +104,7 @@ static int ext2_create (struct inode * dir, struct dentry * dentry, int mode, st dquot_initialize(dir); - inode = ext2_new_inode(dir, mode); + inode = ext2_new_inode(dir, mode, &dentry->d_name); if (IS_ERR(inode)) return PTR_ERR(inode); @@ -133,7 +133,7 @@ static int ext2_mknod (struct inode * dir, struct dentry *dentry, int mode, dev_ dquot_initialize(dir); - inode = ext2_new_inode (dir, mode); + inode = ext2_new_inode (dir, mode, &dentry->d_name); err = PTR_ERR(inode); if (!IS_ERR(inode)) { init_special_inode(inode, inode->i_mode, rdev); @@ -159,7 +159,7 @@ static int ext2_symlink (struct inode * dir, struct dentry * dentry, dquot_initialize(dir); - inode = ext2_new_inode (dir, S_IFLNK | S_IRWXUGO); + inode = ext2_new_inode (dir, S_IFLNK | S_IRWXUGO, &dentry->d_name); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out; @@ -230,7 +230,7 @@ static int ext2_mkdir(struct inode * dir, struct dentry * dentry, int mode) inode_inc_link_count(dir); - inode = ext2_new_inode (dir, S_IFDIR | mode); + inode = ext2_new_inode(dir, S_IFDIR | mode, &dentry->d_name); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out_dir; diff --git a/fs/ext2/xattr.h b/fs/ext2/xattr.h index a1a1c21..5e41ccc 100644 --- a/fs/ext2/xattr.h +++ b/fs/ext2/xattr.h @@ -116,9 +116,11 @@ exit_ext2_xattr(void) # endif /* CONFIG_EXT2_FS_XATTR */ #ifdef CONFIG_EXT2_FS_SECURITY -extern int ext2_init_security(struct inode *inode, struct inode *dir); +extern int ext2_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr); #else -static inline int ext2_init_security(struct inode *inode, struct inode *dir) +static inline int ext2_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr) { return 0; } diff --git a/fs/ext2/xattr_security.c b/fs/ext2/xattr_security.c index 3004e15..5d979b4 100644 --- a/fs/ext2/xattr_security.c +++ b/fs/ext2/xattr_security.c @@ -47,14 +47,15 @@ ext2_xattr_security_set(struct dentry *dentry, const char *name, } int -ext2_init_security(struct inode *inode, struct inode *dir) +ext2_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr) { int err; size_t len; void *value; char *name; - err = security_inode_init_security(inode, dir, &name, &value, &len); + err = security_inode_init_security(inode, dir, qstr, &name, &value, &len); if (err) { if (err == -EOPNOTSUPP) return 0; diff --git a/fs/ext3/ialloc.c b/fs/ext3/ialloc.c index 9724aef..bfc2dc4 100644 --- a/fs/ext3/ialloc.c +++ b/fs/ext3/ialloc.c @@ -404,7 +404,8 @@ static int find_group_other(struct super_block *sb, struct inode *parent) * For other inodes, search forward from the parent directory's block * group to find a free inode. */ -struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, int mode) +struct inode *ext3_new_inode(handle_t *handle, struct inode * dir, + const struct qstr *qstr, int mode) { struct super_block *sb; struct buffer_head *bitmap_bh = NULL; @@ -589,7 +590,7 @@ got: if (err) goto fail_free_drop; - err = ext3_init_security(handle,inode, dir); + err = ext3_init_security(handle, inode, dir, qstr); if (err) goto fail_free_drop; diff --git a/fs/ext3/namei.c b/fs/ext3/namei.c index bce9dce..a900033 100644 --- a/fs/ext3/namei.c +++ b/fs/ext3/namei.c @@ -1707,7 +1707,7 @@ retry: if (IS_DIRSYNC(dir)) handle->h_sync = 1; - inode = ext3_new_inode (handle, dir, mode); + inode = ext3_new_inode (handle, dir, &dentry->d_name, mode); err = PTR_ERR(inode); if (!IS_ERR(inode)) { inode->i_op = &ext3_file_inode_operations; @@ -1743,7 +1743,7 @@ retry: if (IS_DIRSYNC(dir)) handle->h_sync = 1; - inode = ext3_new_inode (handle, dir, mode); + inode = ext3_new_inode (handle, dir, &dentry->d_name, mode); err = PTR_ERR(inode); if (!IS_ERR(inode)) { init_special_inode(inode, inode->i_mode, rdev); @@ -1781,7 +1781,7 @@ retry: if (IS_DIRSYNC(dir)) handle->h_sync = 1; - inode = ext3_new_inode (handle, dir, S_IFDIR | mode); + inode = ext3_new_inode (handle, dir, &dentry->d_name, S_IFDIR | mode); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out_stop; @@ -2195,7 +2195,7 @@ retry: if (IS_DIRSYNC(dir)) handle->h_sync = 1; - inode = ext3_new_inode (handle, dir, S_IFLNK|S_IRWXUGO); + inode = ext3_new_inode (handle, dir, &dentry->d_name, S_IFLNK|S_IRWXUGO); err = PTR_ERR(inode); if (IS_ERR(inode)) goto out_stop; diff --git a/fs/ext3/xattr.h b/fs/ext3/xattr.h index 377fe72..2be4f69 100644 --- a/fs/ext3/xattr.h +++ b/fs/ext3/xattr.h @@ -128,10 +128,10 @@ exit_ext3_xattr(void) #ifdef CONFIG_EXT3_FS_SECURITY extern int ext3_init_security(handle_t *handle, struct inode *inode, - struct inode *dir); + struct inode *dir, const struct qstr *qstr); #else static inline int ext3_init_security(handle_t *handle, struct inode *inode, - struct inode *dir) + struct inode *dir, const struct qstr *qstr) { return 0; } diff --git a/fs/ext3/xattr_security.c b/fs/ext3/xattr_security.c index 03a99bf..b8d9f83 100644 --- a/fs/ext3/xattr_security.c +++ b/fs/ext3/xattr_security.c @@ -49,14 +49,15 @@ ext3_xattr_security_set(struct dentry *dentry, const char *name, } int -ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir) +ext3_init_security(handle_t *handle, struct inode *inode, struct inode *dir, + const struct qstr *qstr) { int err; size_t len; void *value; char *name; - err = security_inode_init_security(inode, dir, &name, &value, &len); + err = security_inode_init_security(inode, dir, qstr, &name, &value, &len); if (err) { if (err == -EOPNOTSUPP) return 0; diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c index 1ce240a..49b6cfd 100644 --- a/fs/ext4/ialloc.c +++ b/fs/ext4/ialloc.c @@ -1042,7 +1042,7 @@ got: if (err) goto fail_free_drop; - err = ext4_init_security(handle, inode, dir); + err = ext4_init_security(handle, inode, dir, qstr); if (err) goto fail_free_drop; diff --git a/fs/ext4/xattr.h b/fs/ext4/xattr.h index 1ef1652..25b7387 100644 --- a/fs/ext4/xattr.h +++ b/fs/ext4/xattr.h @@ -145,10 +145,10 @@ ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize, #ifdef CONFIG_EXT4_FS_SECURITY extern int ext4_init_security(handle_t *handle, struct inode *inode, - struct inode *dir); + struct inode *dir, const struct qstr *qstr); #else static inline int ext4_init_security(handle_t *handle, struct inode *inode, - struct inode *dir) + struct inode *dir, const struct qstr *qstr) { return 0; } diff --git a/fs/ext4/xattr_security.c b/fs/ext4/xattr_security.c index 9b21268..007c3bf 100644 --- a/fs/ext4/xattr_security.c +++ b/fs/ext4/xattr_security.c @@ -49,14 +49,15 @@ ext4_xattr_security_set(struct dentry *dentry, const char *name, } int -ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir) +ext4_init_security(handle_t *handle, struct inode *inode, struct inode *dir, + const struct qstr *qstr) { int err; size_t len; void *value; char *name; - err = security_inode_init_security(inode, dir, &name, &value, &len); + err = security_inode_init_security(inode, dir, qstr, &name, &value, &len); if (err) { if (err == -EOPNOTSUPP) return 0; diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c index e1213f7..52fd31e 100644 --- a/fs/gfs2/inode.c +++ b/fs/gfs2/inode.c @@ -791,14 +791,15 @@ fail: return error; } -static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip) +static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip, + const struct qstr *qstr) { int err; size_t len; void *value; char *name; - err = security_inode_init_security(&ip->i_inode, &dip->i_inode, + err = security_inode_init_security(&ip->i_inode, &dip->i_inode, qstr, &name, &value, &len); if (err) { @@ -882,7 +883,7 @@ struct inode *gfs2_createi(struct gfs2_holder *ghs, const struct qstr *name, if (error) goto fail_gunlock2; - error = gfs2_security_init(dip, GFS2_I(inode)); + error = gfs2_security_init(dip, GFS2_I(inode), name); if (error) goto fail_gunlock2; diff --git a/fs/jffs2/dir.c b/fs/jffs2/dir.c index 9297865..82faddd 100644 --- a/fs/jffs2/dir.c +++ b/fs/jffs2/dir.c @@ -215,8 +215,7 @@ static int jffs2_create(struct inode *dir_i, struct dentry *dentry, int mode, no chance of AB-BA deadlock involving its f->sem). */ mutex_unlock(&f->sem); - ret = jffs2_do_create(c, dir_f, f, ri, - dentry->d_name.name, dentry->d_name.len); + ret = jffs2_do_create(c, dir_f, f, ri, &dentry->d_name); if (ret) goto fail; @@ -386,7 +385,7 @@ static int jffs2_symlink (struct inode *dir_i, struct dentry *dentry, const char jffs2_complete_reservation(c); - ret = jffs2_init_security(inode, dir_i); + ret = jffs2_init_security(inode, dir_i, &dentry->d_name); if (ret) goto fail; @@ -530,7 +529,7 @@ static int jffs2_mkdir (struct inode *dir_i, struct dentry *dentry, int mode) jffs2_complete_reservation(c); - ret = jffs2_init_security(inode, dir_i); + ret = jffs2_init_security(inode, dir_i, &dentry->d_name); if (ret) goto fail; @@ -703,7 +702,7 @@ static int jffs2_mknod (struct inode *dir_i, struct dentry *dentry, int mode, de jffs2_complete_reservation(c); - ret = jffs2_init_security(inode, dir_i); + ret = jffs2_init_security(inode, dir_i, &dentry->d_name); if (ret) goto fail; diff --git a/fs/jffs2/nodelist.h b/fs/jffs2/nodelist.h index 5a53d9b..e4619b0 100644 --- a/fs/jffs2/nodelist.h +++ b/fs/jffs2/nodelist.h @@ -401,7 +401,7 @@ int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, unsigned char *buf, uint32_t offset, uint32_t writelen, uint32_t *retlen); int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f, - struct jffs2_raw_inode *ri, const char *name, int namelen); + struct jffs2_raw_inode *ri, const struct qstr *qstr); int jffs2_do_unlink(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, const char *name, int namelen, struct jffs2_inode_info *dead_f, uint32_t time); int jffs2_do_link(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, uint32_t ino, diff --git a/fs/jffs2/security.c b/fs/jffs2/security.c index 239f512..cfeb716 100644 --- a/fs/jffs2/security.c +++ b/fs/jffs2/security.c @@ -23,14 +23,15 @@ #include "nodelist.h" /* ---- Initial Security Label Attachment -------------- */ -int jffs2_init_security(struct inode *inode, struct inode *dir) +int jffs2_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr) { int rc; size_t len; void *value; char *name; - rc = security_inode_init_security(inode, dir, &name, &value, &len); + rc = security_inode_init_security(inode, dir, qstr, &name, &value, &len); if (rc) { if (rc == -EOPNOTSUPP) return 0; diff --git a/fs/jffs2/write.c b/fs/jffs2/write.c index c819eb0..30d175b 100644 --- a/fs/jffs2/write.c +++ b/fs/jffs2/write.c @@ -424,7 +424,9 @@ int jffs2_write_inode_range(struct jffs2_sb_info *c, struct jffs2_inode_info *f, return ret; } -int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, const char *name, int namelen) +int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, + struct jffs2_inode_info *f, struct jffs2_raw_inode *ri, + const struct qstr *qstr) { struct jffs2_raw_dirent *rd; struct jffs2_full_dnode *fn; @@ -466,15 +468,15 @@ int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, str mutex_unlock(&f->sem); jffs2_complete_reservation(c); - ret = jffs2_init_security(&f->vfs_inode, &dir_f->vfs_inode); + ret = jffs2_init_security(&f->vfs_inode, &dir_f->vfs_inode, qstr); if (ret) return ret; ret = jffs2_init_acl_post(&f->vfs_inode); if (ret) return ret; - ret = jffs2_reserve_space(c, sizeof(*rd)+namelen, &alloclen, - ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(namelen)); + ret = jffs2_reserve_space(c, sizeof(*rd)+qstr->len, &alloclen, + ALLOC_NORMAL, JFFS2_SUMMARY_DIRENT_SIZE(qstr->len)); if (ret) { /* Eep. */ @@ -493,19 +495,19 @@ int jffs2_do_create(struct jffs2_sb_info *c, struct jffs2_inode_info *dir_f, str rd->magic = cpu_to_je16(JFFS2_MAGIC_BITMASK); rd->nodetype = cpu_to_je16(JFFS2_NODETYPE_DIRENT); - rd->totlen = cpu_to_je32(sizeof(*rd) + namelen); + rd->totlen = cpu_to_je32(sizeof(*rd) + qstr->len); rd->hdr_crc = cpu_to_je32(crc32(0, rd, sizeof(struct jffs2_unknown_node)-4)); rd->pino = cpu_to_je32(dir_f->inocache->ino); rd->version = cpu_to_je32(++dir_f->highest_version); rd->ino = ri->ino; rd->mctime = ri->ctime; - rd->nsize = namelen; + rd->nsize = qstr->len; rd->type = DT_REG; rd->node_crc = cpu_to_je32(crc32(0, rd, sizeof(*rd)-8)); - rd->name_crc = cpu_to_je32(crc32(0, name, namelen)); + rd->name_crc = cpu_to_je32(crc32(0, qstr->name, qstr->len)); - fd = jffs2_write_dirent(c, dir_f, rd, name, namelen, ALLOC_NORMAL); + fd = jffs2_write_dirent(c, dir_f, rd, qstr->name, qstr->len, ALLOC_NORMAL); jffs2_free_raw_dirent(rd); diff --git a/fs/jffs2/xattr.h b/fs/jffs2/xattr.h index cf4f575..7be4beb 100644 --- a/fs/jffs2/xattr.h +++ b/fs/jffs2/xattr.h @@ -121,10 +121,11 @@ extern ssize_t jffs2_listxattr(struct dentry *, char *, size_t); #endif /* CONFIG_JFFS2_FS_XATTR */ #ifdef CONFIG_JFFS2_FS_SECURITY -extern int jffs2_init_security(struct inode *inode, struct inode *dir); +extern int jffs2_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr); extern const struct xattr_handler jffs2_security_xattr_handler; #else -#define jffs2_init_security(inode,dir) (0) +#define jffs2_init_security(inode,dir,qstr) (0) #endif /* CONFIG_JFFS2_FS_SECURITY */ #endif /* _JFFS2_FS_XATTR_H_ */ diff --git a/fs/jfs/jfs_xattr.h b/fs/jfs/jfs_xattr.h index 88b6cc5..e9e100f 100644 --- a/fs/jfs/jfs_xattr.h +++ b/fs/jfs/jfs_xattr.h @@ -62,10 +62,11 @@ extern ssize_t jfs_listxattr(struct dentry *, char *, size_t); extern int jfs_removexattr(struct dentry *, const char *); #ifdef CONFIG_JFS_SECURITY -extern int jfs_init_security(tid_t, struct inode *, struct inode *); +extern int jfs_init_security(tid_t, struct inode *, struct inode *, + const struct qstr *); #else static inline int jfs_init_security(tid_t tid, struct inode *inode, - struct inode *dir) + struct inode *dir, const struct qstr *qstr) { return 0; } diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c index 231ca4a..ff0fda9 100644 --- a/fs/jfs/namei.c +++ b/fs/jfs/namei.c @@ -114,7 +114,7 @@ static int jfs_create(struct inode *dip, struct dentry *dentry, int mode, if (rc) goto out3; - rc = jfs_init_security(tid, ip, dip); + rc = jfs_init_security(tid, ip, dip, &dentry->d_name); if (rc) { txAbort(tid, 0); goto out3; @@ -252,7 +252,7 @@ static int jfs_mkdir(struct inode *dip, struct dentry *dentry, int mode) if (rc) goto out3; - rc = jfs_init_security(tid, ip, dip); + rc = jfs_init_security(tid, ip, dip, &dentry->d_name); if (rc) { txAbort(tid, 0); goto out3; @@ -931,7 +931,7 @@ static int jfs_symlink(struct inode *dip, struct dentry *dentry, mutex_lock_nested(&JFS_IP(dip)->commit_mutex, COMMIT_MUTEX_PARENT); mutex_lock_nested(&JFS_IP(ip)->commit_mutex, COMMIT_MUTEX_CHILD); - rc = jfs_init_security(tid, ip, dip); + rc = jfs_init_security(tid, ip, dip, &dentry->d_name); if (rc) goto out3; @@ -1394,7 +1394,7 @@ static int jfs_mknod(struct inode *dir, struct dentry *dentry, if (rc) goto out3; - rc = jfs_init_security(tid, ip, dir); + rc = jfs_init_security(tid, ip, dir, &dentry->d_name); if (rc) { txAbort(tid, 0); goto out3; diff --git a/fs/jfs/xattr.c b/fs/jfs/xattr.c index 2d7f165..3fa4c32 100644 --- a/fs/jfs/xattr.c +++ b/fs/jfs/xattr.c @@ -1091,7 +1091,8 @@ int jfs_removexattr(struct dentry *dentry, const char *name) } #ifdef CONFIG_JFS_SECURITY -int jfs_init_security(tid_t tid, struct inode *inode, struct inode *dir) +int jfs_init_security(tid_t tid, struct inode *inode, struct inode *dir, + const struct qstr *qstr) { int rc; size_t len; @@ -1099,7 +1100,8 @@ int jfs_init_security(tid_t tid, struct inode *inode, struct inode *dir) char *suffix; char *name; - rc = security_inode_init_security(inode, dir, &suffix, &value, &len); + rc = security_inode_init_security(inode, dir, qstr, &suffix, &value, + &len); if (rc) { if (rc == -EOPNOTSUPP) return 0; diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c index ff5744e..7740bc0 100644 --- a/fs/ocfs2/namei.c +++ b/fs/ocfs2/namei.c @@ -294,7 +294,7 @@ static int ocfs2_mknod(struct inode *dir, } /* get security xattr */ - status = ocfs2_init_security_get(inode, dir, &si); + status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); if (status) { if (status == -EOPNOTSUPP) si.enable = 0; @@ -1665,7 +1665,7 @@ static int ocfs2_symlink(struct inode *dir, } /* get security xattr */ - status = ocfs2_init_security_get(inode, dir, &si); + status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si); if (status) { if (status == -EOPNOTSUPP) si.enable = 0; diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c index b5f9160..cd3f5b4 100644 --- a/fs/ocfs2/refcounttree.c +++ b/fs/ocfs2/refcounttree.c @@ -4325,7 +4325,8 @@ static int ocfs2_reflink(struct dentry *old_dentry, struct inode *dir, /* If the security isn't preserved, we need to re-initialize them. */ if (!preserve) { - error = ocfs2_init_security_and_acl(dir, new_orphan_inode); + error = ocfs2_init_security_and_acl(dir, new_orphan_inode, + &new_dentry->d_name); if (error) mlog_errno(error); } diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c index 67cd439..6bb6024 100644 --- a/fs/ocfs2/xattr.c +++ b/fs/ocfs2/xattr.c @@ -7185,7 +7185,8 @@ out: * must not hold any lock expect i_mutex. */ int ocfs2_init_security_and_acl(struct inode *dir, - struct inode *inode) + struct inode *inode, + const struct qstr *qstr) { int ret = 0; struct buffer_head *dir_bh = NULL; @@ -7193,7 +7194,7 @@ int ocfs2_init_security_and_acl(struct inode *dir, .enable = 1, }; - ret = ocfs2_init_security_get(inode, dir, &si); + ret = ocfs2_init_security_get(inode, dir, qstr, &si); if (!ret) { ret = ocfs2_xattr_set(inode, OCFS2_XATTR_INDEX_SECURITY, si.name, si.value, si.value_len, @@ -7261,13 +7262,14 @@ static int ocfs2_xattr_security_set(struct dentry *dentry, const char *name, int ocfs2_init_security_get(struct inode *inode, struct inode *dir, + const struct qstr *qstr, struct ocfs2_security_xattr_info *si) { /* check whether ocfs2 support feature xattr */ if (!ocfs2_supports_xattr(OCFS2_SB(dir->i_sb))) return -EOPNOTSUPP; - return security_inode_init_security(inode, dir, &si->name, &si->value, - &si->value_len); + return security_inode_init_security(inode, dir, qstr, &si->name, + &si->value, &si->value_len); } int ocfs2_init_security_set(handle_t *handle, diff --git a/fs/ocfs2/xattr.h b/fs/ocfs2/xattr.h index aa64bb3..d63cfb7 100644 --- a/fs/ocfs2/xattr.h +++ b/fs/ocfs2/xattr.h @@ -57,6 +57,7 @@ int ocfs2_has_inline_xattr_value_outside(struct inode *inode, struct ocfs2_dinode *di); int ocfs2_xattr_remove(struct inode *, struct buffer_head *); int ocfs2_init_security_get(struct inode *, struct inode *, + const struct qstr *, struct ocfs2_security_xattr_info *); int ocfs2_init_security_set(handle_t *, struct inode *, struct buffer_head *, @@ -94,5 +95,6 @@ int ocfs2_reflink_xattrs(struct inode *old_inode, struct buffer_head *new_bh, bool preserve_security); int ocfs2_init_security_and_acl(struct inode *dir, - struct inode *inode); + struct inode *inode, + const struct qstr *qstr); #endif /* OCFS2_XATTR_H */ diff --git a/fs/reiserfs/namei.c b/fs/reiserfs/namei.c index ba5f51e..d5b22ed 100644 --- a/fs/reiserfs/namei.c +++ b/fs/reiserfs/namei.c @@ -593,7 +593,7 @@ static int reiserfs_create(struct inode *dir, struct dentry *dentry, int mode, new_inode_init(inode, dir, mode); jbegin_count += reiserfs_cache_default_acl(dir); - retval = reiserfs_security_init(dir, inode, &security); + retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); if (retval < 0) { drop_new_inode(inode); return retval; @@ -667,7 +667,7 @@ static int reiserfs_mknod(struct inode *dir, struct dentry *dentry, int mode, new_inode_init(inode, dir, mode); jbegin_count += reiserfs_cache_default_acl(dir); - retval = reiserfs_security_init(dir, inode, &security); + retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); if (retval < 0) { drop_new_inode(inode); return retval; @@ -747,7 +747,7 @@ static int reiserfs_mkdir(struct inode *dir, struct dentry *dentry, int mode) new_inode_init(inode, dir, mode); jbegin_count += reiserfs_cache_default_acl(dir); - retval = reiserfs_security_init(dir, inode, &security); + retval = reiserfs_security_init(dir, inode, &dentry->d_name, &security); if (retval < 0) { drop_new_inode(inode); return retval; @@ -1032,7 +1032,8 @@ static int reiserfs_symlink(struct inode *parent_dir, } new_inode_init(inode, parent_dir, mode); - retval = reiserfs_security_init(parent_dir, inode, &security); + retval = reiserfs_security_init(parent_dir, inode, &dentry->d_name, + &security); if (retval < 0) { drop_new_inode(inode); return retval; diff --git a/fs/reiserfs/xattr_security.c b/fs/reiserfs/xattr_security.c index 237c692..ef66c18 100644 --- a/fs/reiserfs/xattr_security.c +++ b/fs/reiserfs/xattr_security.c @@ -54,6 +54,7 @@ static size_t security_list(struct dentry *dentry, char *list, size_t list_len, * of blocks needed for the transaction. If successful, reiserfs_security * must be released using reiserfs_security_free when the caller is done. */ int reiserfs_security_init(struct inode *dir, struct inode *inode, + const struct qstr *qstr, struct reiserfs_security_handle *sec) { int blocks = 0; @@ -65,7 +66,7 @@ int reiserfs_security_init(struct inode *dir, struct inode *inode, if (IS_PRIVATE(dir)) return 0; - error = security_inode_init_security(inode, dir, &sec->name, + error = security_inode_init_security(inode, dir, qstr, &sec->name, &sec->value, &sec->length); if (error) { if (error == -EOPNOTSUPP) diff --git a/fs/xfs/linux-2.6/xfs_iops.c b/fs/xfs/linux-2.6/xfs_iops.c index 94d5fd6..d9298cf 100644 --- a/fs/xfs/linux-2.6/xfs_iops.c +++ b/fs/xfs/linux-2.6/xfs_iops.c @@ -103,7 +103,8 @@ xfs_mark_inode_dirty( STATIC int xfs_init_security( struct inode *inode, - struct inode *dir) + struct inode *dir, + const struct qstr *qstr) { struct xfs_inode *ip = XFS_I(inode); size_t length; @@ -111,7 +112,7 @@ xfs_init_security( unsigned char *name; int error; - error = security_inode_init_security(inode, dir, (char **)&name, + error = security_inode_init_security(inode, dir, qstr, (char **)&name, &value, &length); if (error) { if (error == -EOPNOTSUPP) @@ -195,7 +196,7 @@ xfs_vn_mknod( inode = VFS_I(ip); - error = xfs_init_security(inode, dir); + error = xfs_init_security(inode, dir, &dentry->d_name); if (unlikely(error)) goto out_cleanup_inode; @@ -368,7 +369,7 @@ xfs_vn_symlink( inode = VFS_I(cip); - error = xfs_init_security(inode, dir); + error = xfs_init_security(inode, dir, &dentry->d_name); if (unlikely(error)) goto out_cleanup_inode; diff --git a/include/linux/ext3_fs.h b/include/linux/ext3_fs.h index 6ce1bca..87312a8 100644 --- a/include/linux/ext3_fs.h +++ b/include/linux/ext3_fs.h @@ -874,7 +874,8 @@ extern int ext3fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo); /* ialloc.c */ -extern struct inode * ext3_new_inode (handle_t *, struct inode *, int); +extern struct inode * ext3_new_inode (handle_t *, struct inode *, + const struct qstr *, int); extern void ext3_free_inode (handle_t *, struct inode *); extern struct inode * ext3_orphan_get (struct super_block *, unsigned long); extern unsigned long ext3_count_free_inodes (struct super_block *); diff --git a/include/linux/reiserfs_xattr.h b/include/linux/reiserfs_xattr.h index b2cf208..c2b7147 100644 --- a/include/linux/reiserfs_xattr.h +++ b/include/linux/reiserfs_xattr.h @@ -63,6 +63,7 @@ extern const struct xattr_handler reiserfs_xattr_trusted_handler; extern const struct xattr_handler reiserfs_xattr_security_handler; #ifdef CONFIG_REISERFS_FS_SECURITY int reiserfs_security_init(struct inode *dir, struct inode *inode, + const struct qstr *qstr, struct reiserfs_security_handle *sec); int reiserfs_security_write(struct reiserfs_transaction_handle *th, struct inode *inode, @@ -130,6 +131,7 @@ static inline void reiserfs_init_xattr_rwsem(struct inode *inode) #ifndef CONFIG_REISERFS_FS_SECURITY static inline int reiserfs_security_init(struct inode *dir, struct inode *inode, + const struct qstr *qstr, struct reiserfs_security_handle *sec) { return 0; diff --git a/include/linux/security.h b/include/linux/security.h index 4ab684e..02fcc0e 100644 --- a/include/linux/security.h +++ b/include/linux/security.h @@ -25,6 +25,7 @@ #include #include #include +#include #include #include #include @@ -315,6 +316,7 @@ static inline void security_free_mnt_opts(struct security_mnt_opts *opts) * then it should return -EOPNOTSUPP to skip this processing. * @inode contains the inode structure of the newly created inode. * @dir contains the inode structure of the parent directory. + * @qstr contains the last path component of the new object * @name will be set to the allocated name suffix (e.g. selinux). * @value will be set to the allocated attribute value. * @len will be set to the length of the value. @@ -1437,7 +1439,8 @@ struct security_operations { int (*inode_alloc_security) (struct inode *inode); void (*inode_free_security) (struct inode *inode); int (*inode_init_security) (struct inode *inode, struct inode *dir, - char **name, void **value, size_t *len); + const struct qstr *qstr, char **name, + void **value, size_t *len); int (*inode_create) (struct inode *dir, struct dentry *dentry, int mode); int (*inode_link) (struct dentry *old_dentry, @@ -1701,7 +1704,8 @@ int security_sb_parse_opts_str(char *options, struct security_mnt_opts *opts); int security_inode_alloc(struct inode *inode); void security_inode_free(struct inode *inode); int security_inode_init_security(struct inode *inode, struct inode *dir, - char **name, void **value, size_t *len); + const struct qstr *qstr, char **name, + void **value, size_t *len); int security_inode_create(struct inode *dir, struct dentry *dentry, int mode); int security_inode_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_dentry); @@ -2028,6 +2032,7 @@ static inline void security_inode_free(struct inode *inode) static inline int security_inode_init_security(struct inode *inode, struct inode *dir, + const struct qstr *qstr, char **name, void **value, size_t *len) diff --git a/mm/shmem.c b/mm/shmem.c index 47fdeeb..86cd21d 100644 --- a/mm/shmem.c +++ b/mm/shmem.c @@ -1843,8 +1843,9 @@ shmem_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev) inode = shmem_get_inode(dir->i_sb, dir, mode, dev, VM_NORESERVE); if (inode) { - error = security_inode_init_security(inode, dir, NULL, NULL, - NULL); + error = security_inode_init_security(inode, dir, + &dentry->d_name, NULL, + NULL, NULL); if (error) { if (error != -EOPNOTSUPP) { iput(inode); @@ -1983,8 +1984,8 @@ static int shmem_symlink(struct inode *dir, struct dentry *dentry, const char *s if (!inode) return -ENOSPC; - error = security_inode_init_security(inode, dir, NULL, NULL, - NULL); + error = security_inode_init_security(inode, dir, &dentry->d_name, NULL, + NULL, NULL); if (error) { if (error != -EOPNOTSUPP) { iput(inode); diff --git a/security/capability.c b/security/capability.c index 92a1bff..c3d796c 100644 --- a/security/capability.c +++ b/security/capability.c @@ -118,7 +118,8 @@ static void cap_inode_free_security(struct inode *inode) } static int cap_inode_init_security(struct inode *inode, struct inode *dir, - char **name, void **value, size_t *len) + const struct qstr *qstr, char **name, + void **value, size_t *len) { return -EOPNOTSUPP; } diff --git a/security/security.c b/security/security.c index 799239d..7ebeb86 100644 --- a/security/security.c +++ b/security/security.c @@ -336,11 +336,13 @@ void security_inode_free(struct inode *inode) } int security_inode_init_security(struct inode *inode, struct inode *dir, - char **name, void **value, size_t *len) + const struct qstr *qstr, char **name, + void **value, size_t *len) { if (unlikely(IS_PRIVATE(inode))) return -EOPNOTSUPP; - return security_ops->inode_init_security(inode, dir, name, value, len); + return security_ops->inode_init_security(inode, dir, qstr, name, value, + len); } EXPORT_SYMBOL(security_inode_init_security); diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c index b8dcd05..7699e23 100644 --- a/security/selinux/hooks.c +++ b/security/selinux/hooks.c @@ -39,6 +39,7 @@ #include #include #include +#include #include #include #include @@ -2509,8 +2510,8 @@ static void selinux_inode_free_security(struct inode *inode) } static int selinux_inode_init_security(struct inode *inode, struct inode *dir, - char **name, void **value, - size_t *len) + const struct qstr *qstr, char **name, + void **value, size_t *len) { const struct task_security_struct *tsec = current_security(); struct inode_security_struct *dsec; diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index 489a85a..581b65e 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -31,6 +31,7 @@ #include #include #include +#include #include "smack.h" #define task_security(task) (task_cred_xxx((task), security)) @@ -424,6 +425,7 @@ static void smack_inode_free_security(struct inode *inode) * smack_inode_init_security - copy out the smack from an inode * @inode: the inode * @dir: unused + * @qstr: unused * @name: where to put the attribute name * @value: where to put the attribute value * @len: where to put the length of the attribute @@ -431,7 +433,8 @@ static void smack_inode_free_security(struct inode *inode) * Returns 0 if it all works out, -ENOMEM if there's no memory */ static int smack_inode_init_security(struct inode *inode, struct inode *dir, - char **name, void **value, size_t *len) + const struct qstr *qstr, char **name, + void **value, size_t *len) { char *isp = smk_of_inode(inode); From stan@hardwarefreak.com Wed Dec 8 16:12:19 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_36, J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB8MCJ3W149194 for ; Wed, 8 Dec 2010 16:12:19 -0600 X-ASG-Debug-ID: 1291846446-7a2a037b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D066C1CA7F4F for ; Wed, 8 Dec 2010 14:14:07 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id 99wgGwIGgL6qbMh5 for ; Wed, 08 Dec 2010 14:14:07 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id D2A6C6C174 for ; Wed, 8 Dec 2010 16:14:05 -0600 (CST) Message-ID: <4D00032D.4040000@hardwarefreak.com> Date: Wed, 08 Dec 2010 16:14:05 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs tuning for a 830 GB partition (mkfs.xfs options) Subject: Re: xfs tuning for a 830 GB partition (mkfs.xfs options) References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1291846447 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.01 X-Barracuda-Spam-Status: No, SCORE=-1.01 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC, SUBJECT_FUZZY_TION X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48864 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.41 SUBJECT_FUZZY_TION Attempt to obfuscate words in Subject: 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Abel Coto put forth on 12/8/2010 1:32 PM: > I want to create a 830 GB partition, to mount as /home in my Centos 5.4 > workstation. > > Actually i have /home not mounted ,so i would have to create the new > partition in the lvm,format it and use rsync to copy /home directory to it. > > for a 830 GB partition that i will use to save my data in general and also > 3d / CG projects and renders once finished them what agcount value should be > used. I have read that mkfs default option creates 1 allocation group each > 4G , so i understand that for a 830 GB partition agcount should be 208. > > It is this correct ? No that's not correct. > so i would use for format the partition > > mkfs.xfs -l lazy-count=1,version=2,size=128m -i attr=2 -d agcount=208 -L > VolumeName Do not do this! If this filesystem will reside on a single physical disk, format the partition using the XFS defaults. agcount, and most of the other options, exists for optimizing parallel performance on striped RAID or SSD storage systems that have lots of IOPS performance. These options are _not_ for use on single disk drives. AG count is related to number of spindles and/or IOPs throughput, not the size of the partition. The mkfs.xfs default for a single drive filesystem is 4 AGs. If you specify a value greater than 4 your performance will suffer. If you specify 208 AGs it may likely be little faster than a floppy disk drive. -- Stan From stan@hardwarefreak.com Wed Dec 8 18:26:03 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB90Q3oR154028 for ; Wed, 8 Dec 2010 18:26:03 -0600 X-ASG-Debug-ID: 1291854470-577203e20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A5A421CA8667 for ; Wed, 8 Dec 2010 16:27:51 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id hDXytBuwkkwogvAh for ; Wed, 08 Dec 2010 16:27:51 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id C2B386C173 for ; Wed, 8 Dec 2010 18:27:50 -0600 (CST) Message-ID: <4D002286.2080204@hardwarefreak.com> Date: Wed, 08 Dec 2010 18:27:50 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs tuning for a 830 GB partition (mkfs.xfs options) Subject: Re: xfs tuning for a 830 GB partition (mkfs.xfs options) References: <4D00032D.4040000@hardwarefreak.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1291854471 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.01 X-Barracuda-Spam-Status: No, SCORE=-1.01 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, BSF_SC5_SA210e, RDNS_DYNAMIC, SUBJECT_FUZZY_TION X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48874 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.41 SUBJECT_FUZZY_TION Attempt to obfuscate words in Subject: 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 0.00 BSF_SC5_SA210e Custom Rule SA210e X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Abel Coto put forth on 12/8/2010 5:29 PM: > By the moment i will use one hard disk for / (on ext3) and /home , and > the data partition for saving 3d projects working on in another hard > disk (1,5 tb one , with the 350 GB partition and one of 1 TB for > backups of /home mostly) > > so agcount should be in both cases 4, as i haven't got a raid (the 1,5 > tb disk won't be in the LVM neither). > > I have read that in xfsprogs 3.1.2, i think, -l lazy-count=1,version=2 > and -i attr=2 is the default option like agcount=4. So i should only > specify the -l size=128m if i want a log size of 128m for improve > deleting performance and improving system in general. With a single disk filesystem, you can tweak these things forever, and you will gain almost no performance benefit over the mkfs.xfs defaults, though you may decrease performance if you don't know exactly what you're doing, such as with your previous misunderstanding of agcount. The one thing you can tweak beyond defaults to get improved performance is using delayed logging, which will increase metadata write performance substantially. For example, deletes of large groups (thousands) of small files will be "massively" faster using delayed logging. IIRC this requires kernel 2.6.36 or later. Simply add "delaylog" to you /etc/fstab mount options. > I think in /home the most important thing is read/write seqential > performance , and in /data (the 350 GB partition) the same. > > I don't think /data would have to handle too many ramdon reads/ writes > when Maya saves and read data from it, i think would be mostly > seqential and then allocated in memory. Again, with a single disk, there's not much you can tweak to increase general XFS performance, except for metadata writes using delaylog. For sequential file reads/writes and random reads/writes, you're at the mercy of the drive's spindle speed. XFS options can't improve upon the poor physics of a single spinning drive. If you need improved file performance (not metadata), your options are to add spindles and stripe the data (RAID card or mdadm, RAID 0/5/6/10), or use a good quality SSD. -- Stan From SRS0+UJ1G+12+fromorbit.com=david@internode.on.net Wed Dec 8 18:58:02 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB90w1pp155373 for ; Wed, 8 Dec 2010 18:58:02 -0600 X-ASG-Debug-ID: 1291856388-20f601c50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D6C891CA7B6A for ; Wed, 8 Dec 2010 16:59:48 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id ArF1txQl4CXmFiEk for ; Wed, 08 Dec 2010 16:59:48 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49678282-1927428 for multiple; Thu, 09 Dec 2010 11:29:46 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PQUrJ-0001ny-0I; Thu, 09 Dec 2010 11:59:45 +1100 Date: Thu, 9 Dec 2010 11:59:44 +1100 From: Dave Chinner To: blacknred Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors Message-ID: <20101209005944.GD32766@dastard> References: <30397503.post@talk.nabble.com> <20101207222558.GC29333@dastard> <30403823.post@talk.nabble.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <30403823.post@talk.nabble.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1291856390 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48876 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 08, 2010 at 01:39:10AM -0800, blacknred wrote: > > > >You've done a forced module load. No guarantee your kernel is in any > >sane shape if you've done that.... > > Agree, but I'm reasonably convinced that module isn't the issue, because it > works fine with my other servers...... > > >Strange failure. Hmmm - i386 arch and fedora - are you running with > 4k stacks? If so, maybe it blew the stack... > > i386 arch, rhel 5.0 Yup, 4k stacks. This is definitely smelling like a stack blowout. XFS on 4k stacks is a ticking timebomb - it will explode and you've got no idea of when it will go boom. Recompile your kernel with 8k stacks or move to x86_64. > ># dd if= bs=512 count=1 | od -c > This is what i get now, but now server's been rebooted and running OK, what > should i be expecting or rather what are we looking for in this output at > point of failure? Well, what you see here: > 0000000 X F S B \0 \0 020 \0 \0 \0 \0 \0 025 324 304 \0 ^^^^^^^^^^^^^ Is a valid XFS superblock magic number. If you are getting this error: > >> XFS: bad magic number > >> XFS: SB validate failed Then I'd expect to see anything other than "XFSB" as the magic number. Of course, if you smashed the stack during mount, then there will most likely be nothing wrong with the value on disk... > >why did I flash the controller > I was on 5.22 fw version which has a known 'lockup' issue which is fixed in > 7.x ver. > This is a critical fix. Is the version 7.x firmware certified with such an old kernel? It's not uncommon for different firmware versions to only be supported on specific releases/kernel versions. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+UJ1G+12+fromorbit.com=david@internode.on.net Wed Dec 8 19:03:47 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_36, J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB913lnA155554 for ; Wed, 8 Dec 2010 19:03:47 -0600 X-ASG-Debug-ID: 1291856733-68fa01330000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 289501D6025 for ; Wed, 8 Dec 2010 17:05:34 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id prTuhfhyJjQTKHG2 for ; Wed, 08 Dec 2010 17:05:34 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 37805253-1927428 for multiple; Thu, 09 Dec 2010 11:35:33 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PQUwt-0001oa-Ak; Thu, 09 Dec 2010 12:05:31 +1100 Date: Thu, 9 Dec 2010 12:05:31 +1100 From: Dave Chinner To: Abel Coto Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs tuning for a 830 GB partition (mkfs.xfs options) Subject: Re: xfs tuning for a 830 GB partition (mkfs.xfs options) Message-ID: <20101209010531.GE32766@dastard> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1291856736 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.61 X-Barracuda-Spam-Status: No, SCORE=-1.61 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=SUBJECT_FUZZY_TION X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48876 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.41 SUBJECT_FUZZY_TION Attempt to obfuscate words in Subject: X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 08, 2010 at 08:32:28PM +0100, Abel Coto wrote: > I want to create a 830 GB partition, to mount as /home in my Centos 5.4 > workstation. > > Actually i have /home not mounted ,so i would have to create the new > partition in the lvm,format it and use rsync to copy /home directory to it. > > for a 830 GB partition that i will use to save my data in general and also > 3d / CG projects and renders once finished them what agcount value should be > used. I have read that mkfs default option creates 1 allocation group each > 4G , so i understand that for a 830 GB partition agcount should be 208. > > It is this correct ? No, you've read something that is at least 5 years out of date. Just use the defaults - they are already optimised for best performance in most circumstances. > I have read that too much allocation groups are bad , but i don't now if 416 > are too much for a 830 GB partition (and shoukd use 208 to 300) or not. Any more than 4 AGs on a single spindle is bad for performance. AGs can be up to 1TB in size, so you're going to get 4 as the default for your 830GB partition. > I will mount the partition with logbufs=8. (i use a 128m journal and > logbufs=8 to improve a bit deleting performance). I will perhaps use noatime > too ,but i have to see if my backup app, uses atime or not. logbufs=8 is the default. Also, the default atime option is relatime which has pretty much zero compareeed to noatime, so once again just use the defaults. > for this partition , that will handle mostly big files (500 MB to 2-3 GB at > least) what mkfs.xfs options should i use ? The defaults. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+rFbk+12+fromorbit.com=david@internode.on.net Wed Dec 8 19:37:37 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_36 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB91ba4l156647 for ; Wed, 8 Dec 2010 19:37:37 -0600 X-ASG-Debug-ID: 1291858479-68dc01da0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DAD231D6DF3 for ; Wed, 8 Dec 2010 17:34:39 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id 7T2GCNU8rJJDw4ar for ; Wed, 08 Dec 2010 17:34:39 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49456341-1927428 for multiple; Thu, 09 Dec 2010 12:04:36 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PQVOg-0001r4-2H; Thu, 09 Dec 2010 12:34:14 +1100 Date: Thu, 9 Dec 2010 12:34:14 +1100 From: Dave Chinner To: Abel Coto Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs tuning for a 830 GB partition (mkfs.xfs options) Subject: Re: xfs tuning for a 830 GB partition (mkfs.xfs options) Message-ID: <20101209013413.GA7105@dastard> References: <20101209010531.GE32766@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101209010531.GE32766@dastard> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1291858480 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0209 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.51 X-Barracuda-Spam-Status: No, SCORE=-1.51 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA085, SUBJECT_FUZZY_TION X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48878 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.41 SUBJECT_FUZZY_TION Attempt to obfuscate words in Subject: 0.10 BSF_SC0_SA085 Custom Rule SA085 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 09, 2010 at 12:05:31PM +1100, Dave Chinner wrote: > On Wed, Dec 08, 2010 at 08:32:28PM +0100, Abel Coto wrote: > > I want to create a 830 GB partition, to mount as /home in my Centos 5.4 > > workstation. > > > > Actually i have /home not mounted ,so i would have to create the new > > partition in the lvm,format it and use rsync to copy /home directory to it. > > > > for a 830 GB partition that i will use to save my data in general and also > > 3d / CG projects and renders once finished them what agcount value should be > > used. I have read that mkfs default option creates 1 allocation group each > > 4G , so i understand that for a 830 GB partition agcount should be 208. > > > > It is this correct ? > > No, you've read something that is at least 5 years out of date. Just > use the defaults - they are already optimised for best performance > in most circumstances. Seeing as I say this so often: http://xfs.org/index.php/XFS_FAQ#Q:_I_want_to_tune_my_XFS_filesystems_for_.3Csomething.3E Cheers, Dave. -- Dave Chinner david@fromorbit.com From sandeen@sandeen.net Wed Dec 8 21:42:28 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB93gSHg166437 for ; Wed, 8 Dec 2010 21:42:28 -0600 X-ASG-Debug-ID: 1291866256-466902630000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2F9B51CA8ED2 for ; Wed, 8 Dec 2010 19:44:16 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id JEutCkHHfi6U8Bhv for ; Wed, 08 Dec 2010 19:44:16 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id 2CEC44817CFA; Wed, 8 Dec 2010 21:44:15 -0600 (CST) Message-ID: <4D00508E.5040408@sandeen.net> Date: Wed, 08 Dec 2010 21:44:14 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: Dave Chinner CC: blacknred , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: possible xfs corruption Subject: Re: possible xfs corruption References: <30395558.post@talk.nabble.com> <20101207221009.GA29333@dastard> In-Reply-To: <20101207221009.GA29333@dastard> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1291866257 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.42 X-Barracuda-Spam-Status: No, SCORE=-1.42 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48886 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/7/10 4:10 PM, Dave Chinner wrote: > On Tue, Dec 07, 2010 at 03:49:49AM -0800, blacknred wrote: >> >> Hi... >> >> I'm stuck with a storage issue on reboot. Initially doubted the storage, but >> dmesg throws these errors. Now wondering whether this is a fs issue? Any >> thoughts as to whats going on here? >> >> >> XFS: failed to locate log tail >> XFS: log mount/recovery failed: error 117 >> XFS: log mount failed >> XFS mounting filesystem cciss/c0d0 >> Filesystem "cciss/c0d0": XFS internal error xlog_clear_stale_blocks(2) at >> line 1237 of file > > Which indicates that the head and/or the tail of the log are not > valid. Can you provide the output of: > > # xfs_logprint -d /dev/cciss/c0d0 > > So we can see what the head/tail values are in the log? > >> /home/buildsvn/rpmbuild/BUILD/xfs-kmod-0.4/_kmod_build_PAE/xfs_log_recover.c. > > CentOS kernel? How old? Assuning it's centos5, there's really no need to be using an xfs kmod there anymore, the module shipped with the kernel in recent versions of the OS is really the one you want to use. That kmod is ancient and unmaintained. Although I suspect the storage is more likely at fault here. :) -Eric > Cheers, > > Dave. From sandeen@sandeen.net Wed Dec 8 21:49:36 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB93nZoe167350 for ; Wed, 8 Dec 2010 21:49:36 -0600 X-ASG-Debug-ID: 1291866683-07ae03420000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 63773152A76D for ; Wed, 8 Dec 2010 19:51:23 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id 0aMhTIiIxjXTwnNX for ; Wed, 08 Dec 2010 19:51:23 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id EEE234817CFA; Wed, 8 Dec 2010 21:51:22 -0600 (CST) Message-ID: <4D00523A.9020703@sandeen.net> Date: Wed, 08 Dec 2010 21:51:22 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: Ajeet Yadav CC: Dave Chinner , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: XFS mount fail: XFS_WANT_CORRUPTED_GOTO fs/xfs/xfs_alloc.c Subject: Re: XFS mount fail: XFS_WANT_CORRUPTED_GOTO fs/xfs/xfs_alloc.c References: <20101202224506.GY16922@dastard> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1291866684 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48887 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/3/10 10:19 PM, Ajeet Yadav wrote: > Our test case is automated: > 1. Create large number of file of 6KB sizes ( 6KB is taken, we wanted to increase journal load, and file size not in multiple of file system block size) > 2. Set target to reboot at random seconds seconds. What exactly is meant by "reboot?" Does this mean "cycle power" or cleanly reboot? Based on the problems you are encountering, I am guessing that you drop power. Is the storage external for this test? Is it qualified hardware or are you planning on supporting anything that the user may choose to plug into their device? It's possible that an external USB device is behaving poorly, and that may be the root of your problems. -Eric > 3. Next boot do "ls" of all files in XFS partition. > 4. Remove all files in XFS. > 5. Go back to step 1 > > The purpose of this test is to test journal and stability of XFS filestem. > > Do you think, we should consider this test case ? > > Other is when we should run xfs_repair ? because if mount fails and journal contain dirty logs then xfs_repair does not run, we are forced to use (-L) option but its description say that (-L) can corrupt the file system. > > Other case even if xfs mount successfully, even in that case accessing some files give IO input/ output error. > > 1. I recommend the following usage for xfs_repair so that we do not come accross these problem > Mount Success -> Umount -> run xfs_repair -> mount > Mount fails -> try xfs_repair -> xfs_repair fails -> finally xfs_repair -L -> mount > > Adding above mount + xfs_repair procedure to script makes file system stable. But other member of my team do not agree as it increases mount time. > > > > On Fri, Dec 3, 2010 at 4:15 AM, Dave Chinner > wrote: > > On Thu, Dec 02, 2010 at 12:31:30PM +0530, Ajeet Yadav wrote: > > Dear all, > > This is XFS fail mount log on linux 2.6.30.9 > > > > XFS mounting filesystem sda2 > > Starting XFS recovery on filesystem: sda2 (logdev: internal) > > XFS internal error XFS_WANT_CORRUPTED_GOTO at line 1629 of file > > fs/xfs/xfs_alloc.c. Caller 0x80129658 > > Call Trace: > > [<802dedc8>] dump_stack+0x8/0x34 from[<80127400>] > > xfs_free_ag_extent+0x128/0x7ac > > [<80127400>] xfs_free_ag_extent+0x128/0x7ac from[<80129658>] > > xfs_free_extent+0xb8/0xe8 > > [<80129658>] xfs_free_extent+0xb8/0xe8 from[<80163978>] > > xlog_recover_process_efi+0x160/0x214 > > [<80163978>] xlog_recover_process_efi+0x160/0x214 from[<80163ac4>] > > xlog_recover_process_efis+0x98/0x11c > > [<80163ac4>] xlog_recover_process_efis+0x98/0x11c from[<8016663c>] > > xlog_recover_finish+0x28/0xdc > > [<8016663c>] xlog_recover_finish+0x28/0xdc from[<8016aec0>] > > xfs_mountfs+0x4d0/0x610 > > [<8016aec0>] xfs_mountfs+0x4d0/0x610 from[<80184434>] > > xfs_fs_fill_super+0x1fc/0x418 > > [<80184434>] xfs_fs_fill_super+0x1fc/0x418 from[<800bae48>] > > get_sb_bdev+0x11c/0x1c0 > > [<800bae48>] get_sb_bdev+0x11c/0x1c0 from[<80181f20>] > > xfs_fs_get_sb+0x20/0x2c > > [<80181f20>] xfs_fs_get_sb+0x20/0x2c from[<800b9424>] > > vfs_kern_mount+0x68/0xd0 > > [<800b9424>] vfs_kern_mount+0x68/0xd0 from[<800b94f0>] > > do_kern_mount+0x54/0x118 > > [<800b94f0>] do_kern_mount+0x54/0x118 from[<800d44e8>] do_mount+0x7b4/0x828 > > [<800d44e8>] do_mount+0x7b4/0x828 from[<800d45f8>] sys_mount+0x9c/0x194 > > [<800d45f8>] sys_mount+0x9c/0x194 from[<800102c4>] stack_done+0x20/0x3c > > > > Failed to recover EFIs on filesystem: sda2 > > XFS: log mount finish failed > > You corrupted a free space btree. Care to tell uswhat test you were > running that caused this? Did you pull the plug on the device > during a copy again? > > Cheers, > > Dave. > -- > Dave Chinner > david@fromorbit.com > > > > > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs From sandeen@sandeen.net Wed Dec 8 22:42:22 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB94gMZG178743 for ; Wed, 8 Dec 2010 22:42:22 -0600 X-ASG-Debug-ID: 1291869850-10d901190000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D21B11CA8E2C for ; Wed, 8 Dec 2010 20:44:10 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id sh9Gy0OVcseLZGzC for ; Wed, 08 Dec 2010 20:44:10 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id 004544817CFA; Wed, 8 Dec 2010 22:44:09 -0600 (CST) Message-ID: <4D005E99.2030400@sandeen.net> Date: Wed, 08 Dec 2010 22:44:09 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: Dave Chinner CC: blacknred , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors References: <30397503.post@talk.nabble.com> <20101207222558.GC29333@dastard> <30403823.post@talk.nabble.com> <20101209005944.GD32766@dastard> In-Reply-To: <20101209005944.GD32766@dastard> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1291869850 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48890 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/8/10 6:59 PM, Dave Chinner wrote: > On Wed, Dec 08, 2010 at 01:39:10AM -0800, blacknred wrote: >> >> >>> You've done a forced module load. No guarantee your kernel is in any >>> sane shape if you've done that.... >> >> Agree, but I'm reasonably convinced that module isn't the issue, because it >> works fine with my other servers...... >> >>> Strange failure. Hmmm - i386 arch and fedora - are you running with >> 4k stacks? If so, maybe it blew the stack... >> >> i386 arch, rhel 5.0 > > Yup, 4k stacks. This is definitely smelling like a stack blowout. well, hang on. The oops said: EIP: 0060:[] Tainted: GF VLI EFLAGS: 00010272 (2.6.33.3-85.fc13.x86_64 #1) EIP is at do_page_fault+0x245/0x617 eax: ec5ee000 ebx: 00000000 ecx: eb5de084 edx: 0000000e esi: 00013103 edi: ec5de0b3 ebp: 00000023 esp: ec5de024 ds: 008b es: 008b ss: 0078 which is NOT a rhel 5.0 kernel, and it says x86_64. But the addresses are all 32 bits? So what's going on here? > esi: 00013103 edi: ec5de0b3 ebp: 00000023 esp: ec5de024 > ds: 008b es: 008b ss: 0078 > Process bm (pid: 3210, ti=ec622000 task=ec5e3450 task.ti=ec6ee000) end of the stack is ec6ee000, stack grows up, esp is at ec5de024, well past it (i.e. yes, overrun) if I remember my stack math right... but that's a pretty huge difference so either I have it wrong, or things are really a huge mess here. -Eric From sandeen@sandeen.net Wed Dec 8 23:13:32 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.4 required=5.0 tests=BAYES_00,J_CHICKENPOX_43, J_CHICKENPOX_44,J_CHICKENPOX_64,J_CHICKENPOX_66,J_CHICKENPOX_73 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB95DWHh184123 for ; Wed, 8 Dec 2010 23:13:32 -0600 X-ASG-Debug-ID: 1291871719-4b8100c50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DC0DF1D2C41 for ; Wed, 8 Dec 2010 21:15:19 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id MZhwaf2lA8I7j0Az for ; Wed, 08 Dec 2010 21:15:19 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id 8D2C74817CFA; Wed, 8 Dec 2010 23:15:18 -0600 (CST) Message-ID: <4D0065E6.6010009@sandeen.net> Date: Wed, 08 Dec 2010 23:15:18 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: Lukas Czerner CC: xfs@oss.sgi.com, hch@infradead.org, esandeen@redhat.com X-ASG-Orig-Subj: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Subject: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation References: <1290780743-12112-1-git-send-email-lczerner@redhat.com> In-Reply-To: <1290780743-12112-1-git-send-email-lczerner@redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1291871719 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48892 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 11/26/10 8:12 AM, Lukas Czerner wrote: > FITRIM ioctl is used on a mounted filesystem to discard (or "trim") > blocks which are not in use by the filesystem. This is useful for > solid-state drives (SSDs) and thinly-provi-sioned storage. This test > helps to verify filesystem FITRIM implementation to assure that it > does not corrupts data. > > This test creates checksums of all files in /usr/share/doc directory and > run several processes which clear its working directory on SCRATCH_MNT, > then copy everything from /usr/share/doc into its working directory, create > list of files in working directory and its checksums and compare it with the > original list of checksums. Every process works in the loop so it repeat > remove->copy->check, while fstrim tool is running simultaneously. > > Fstrim is just a helper tool which uses FITRIM ioctl to actually do the > filesystem discard. > > I found this very useful because when the FITRIM is really buggy (thus > data-destroying) the 248 test will notice, because checksums will most > likely change. > > Signed-off-by: Lukas Czerner > --- > 248 | 163 +++++++++++++++++++++++++++++++++++++ > 248.out | 3 + > group | 1 + > src/Makefile | 2 +- > src/fstrim.c | 257 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > 5 files changed, 425 insertions(+), 1 deletions(-) > create mode 100755 248 > create mode 100644 248.out > create mode 100644 src/fstrim.c > > diff --git a/248 b/248 > new file mode 100755 > index 0000000..0d2f17f > --- /dev/null > +++ b/248 > @@ -0,0 +1,163 @@ > +#!/bin/bash > +# FS QA Test No. 248 > +# > +# This test was created in order to verify filesystem FITRIM implementation. > +# By many concurrent copy and remove operations and checking that files > +# does not change after copied into SCRATCH_MNT test if FITIM implementation typo up there in "FITIM", just FWIW. > +# corrupts the filesystem (data/metadata). > +# > +#----------------------------------------------------------------------- > +# Copyright 2010 (C) Red Hat, Inc., Lukas Czerner > +# > +# This program is free software; you can redistribute it and/or > +# modify it under the terms of the GNU General Public License as > +# published by the Free Software Foundation. > +# > +# This program is distributed in the hope that it would be useful, > +# but WITHOUT ANY WARRANTY; without even the implied warranty of > +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > +# GNU General Public License for more details. > +# > +# You should have received a copy of the GNU General Public License > +# along with this program; if not, write the Free Software Foundation, > +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA > +#----------------------------------------------------------------------- > + > +owner=lczerner@redhat.com > + > +seq=`basename $0` > +echo "QA output created by $seq" > + > +here=`pwd` > +tmp=`mktemp -d` > +status=1 # failure is the default! > +trap "_cleanup; exit \$status" 0 1 3 > +trap "_destroy; exit \$status" 2 15 > +chpid=0 > +mypid=$$ > + > +# get standard environment, filters and checks > +. ./common.rc > +. ./common.filter > + > +# real QA test starts here > +_supported_fs generic > +_supported_os Linux > +_require_scratch > +_scratch_mkfs >/dev/null 2>&1 > +_scratch_mount > + > +_cleanup() > +{ > + rm -rf $tmp > +} > + > +_destroy() > +{ > + kill $pids $fstrim_pid > + wait $pids $fstrim_pid > + rm -rf $tmp > +} > + > +_destroy_fstrim() > +{ > + kill $fpid > + wait $fpid > +} > + > +fstrim_loop() > +{ > + trap "_destroy_fstrim; exit \$status" 2 15 > + fsize=$(df | grep $SCRATCH_MNT | grep $SCRATCH_DEV | awk '{print $2}') > + > + while true ; do > + step=1048576 > + start=0 > + $here/src/fstrim $SCRATCH_MNT & > + fpid=$! > + wait $fpid > + while [ $start -lt $fsize ] ; do > + $here/src/fstrim -s ${start}k -l ${step}k $SCRATCH_MNT & > + fpid=$! > + wait $fpid > + start=$(( $start + $step )) > + done I may be dense here but a) why do you background and then immediately wait? b) does this start a whole-device trim followed by several smaller range-trims? I could do with some comments, I suppose. > + done > +} > + > +function check_sums() { > + dir=$1 > + > + ( > + cd $SCRATCH_MNT/$p > + find -P . -xdev -type f -print0 | xargs -0 md5sum | sort -o $tmp/stress.$$.$p > + ) > + > + diff $tmp/content.sums $tmp/stress.$$.$p > + if [ $? -ne 0 ]; then > + echo "!!!Checksums has changed - Filesystem possibly corrupted!!!\n" > + kill $mypid what is $mypid? Oh right $$ ... why not: _fail "!!!Checksums has changed - Filesystem possibly corrupted!!!" > + fi > + rm -f $tmp/stress.$$.$p > +} > + > +function run_process() { > + local p=$1 > + repeat=10 > + > + sleep $((5*$p))s & > + export chpid=$! && wait $chpid &> /dev/null I guess I don't sight-read bash very well. What's going on with all the backgrounding/waiting here? > + chpid=0 > + > + while [ $repeat -gt 0 ]; do > + > + # Remove old directories. > + rm -rf $SCRATCH_MNT/$p > + export chpid=$! && wait $chpid &> /dev/null and here? > + # Copy content -> partition. > + mkdir $SCRATCH_MNT/$p > + cp -ax $content/* $SCRATCH_MNT/$p > + export chpid=$! && wait $chpid &> /dev/null > + > + check_sums > + repeat=$(( $repeat - 1 )) > + done > +} > + > +nproc=20 > +content=/usr/share/doc > + > +# Check for FITRIM support > +echo -n "Checking FITRIM support: " > +$here/src/fstrim -l 10M $SCRATCH_MNT > +[ $? -ne 0 ] && exit > +echo "done." > + > +mkdir -p $tmp > + > +( > +cd $content > +find -P . -xdev -type f -print0 | xargs -0 md5sum | sort -o $tmp/content.sums > +) > + > +echo -n "Running the test: " > +pids="" > +fstrim_loop & > +fstrim_pid=$! > +p=1 > +while [ $p -le $nproc ]; do > + run_process $p & > + pids="$pids $!" > + p=$(($p+1)) > +done > +echo "done." > + > +wait $pids > +kill $fstrim_pid > +wait $fstrim_pid > + > +status=0 > +_check_scratch_fs Scratch fs should get checked automatically after the test I think? I guess other tests do this, but I'm not sure it's necessary unless filesystems are made, remounted, etc in a loop during the test > +exit > diff --git a/248.out b/248.out > new file mode 100644 > index 0000000..880d9c7 > --- /dev/null > +++ b/248.out > @@ -0,0 +1,3 @@ > +QA output created by 248 > +Checking FITRIM support: done. > +Running the test: done. > diff --git a/group b/group > index 0f94dd9..fea84ed 100644 > --- a/group > +++ b/group > @@ -361,3 +361,4 @@ deprecated > 245 auto quick dir > 246 auto quick rw > 247 auto quick rw > +248 ioctl I suppose maybe a trim group would be worthwhile at some point ... > diff --git a/src/Makefile b/src/Makefile > index b827bd0..885fd65 100644 > --- a/src/Makefile > +++ b/src/Makefile > @@ -17,7 +17,7 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ > preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \ > locktest unwritten_mmap bulkstat_unlink_test t_stripealign \ > bulkstat_unlink_test_modified t_dir_offset t_futimens t_immutable \ > - stale_handle > + stale_handle fstrim > > SUBDIRS = > > diff --git a/src/fstrim.c b/src/fstrim.c > new file mode 100644 > index 0000000..6686c99 > --- /dev/null > +++ b/src/fstrim.c > @@ -0,0 +1,257 @@ > +/* > + * fstrim.c -- discard the part (or whole) of mounted filesystem. > + * > + * Copyright (C) 2009 Red Hat, Inc., Lukas Czerner 2010 I think :) > + * > + * This program is free software: you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation, either version 2 of the License, or > + * (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program. If not, see . > + * > + * This program uses FITRIM ioctl to discard parts or the whole filesystem > + * online (mounted). You can specify range (start and lenght) to be > + * discarded, or simply discard while filesystem. > + * > + * Usage: fstrim [options] > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include > +#include > +#include > + > +#ifndef FITRIM > +struct fstrim_range { > + uint64_t start; > + uint64_t len; > + uint64_t minlen; > +}; > +#define FITRIM _IOWR('X', 121, struct fstrim_range) > +#endif > + > +const char *program_name = "fstrim"; > + > +struct options { > + struct fstrim_range *range; > + char mpoint[PATH_MAX]; > + char verbose; > +}; > + > +static void usage(void) > +{ > + fprintf(stderr, > + "Usage: %s [-s start] [-l length] [-m minimum-extent]" > + " [-v] {mountpoint}\n\t" > + "-s Starting Byte to discard from\n\t" > + "-l Number of Bytes to discard from the start\n\t" > + "-m Minimum extent length to discard\n\t" > + "-v Verbose - number of discarded bytes\n", > + program_name); > +} > + > +static void err_exit(const char *fmt, ...) > +{ > + va_list pvar; > + va_start(pvar, fmt); > + vfprintf(stderr, fmt, pvar); > + va_end(pvar); > + usage(); > + exit(EXIT_FAILURE); > +} > + > +/** > + * Get the number from argument. It can be number followed by > + * units: k|K, m|M, g|G, t|T > + */ > +static unsigned long long get_number(char **optarg) > +{ > + char *opt, *end; > + unsigned long long number, max; > + > + /* get the max to avoid overflow */ > + max = ULLONG_MAX / 1024; > + number = 0; > + opt = *optarg; > + > + if (*opt == '-') { > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + } > + > + errno = 0; > + number = strtoul(opt, &end , 0); > + if (errno) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(errno), *optarg); > + > + /* > + * Convert units to numbers. Fall-through stack is used for units > + * so absence of breaks is intentional. > + */ wish we had a library for this sort of thing :( > + switch (*end) { > + case 'T': /* terabytes */ > + case 't': > + if (number > max) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + number *= 1024; > + case 'G': /* gigabytes */ > + case 'g': > + if (number > max) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + number *= 1024; > + case 'M': /* megabytes */ > + case 'm': > + if (number > max) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + number *= 1024; > + case 'K': /* kilobytes */ > + case 'k': > + if (number > max) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + number *= 1024; > + end++; > + case '\0': /* end of the string */ > + break; > + default: > + err_exit("%s: %s (%s)\n", program_name, > + strerror(EINVAL), *optarg); > + return 0; > + } > + > + if (*end != '\0') { > + err_exit("%s: %s (%s)\n", program_name, > + strerror(EINVAL), *optarg); > + } > + > + return number; > +} > + > +static int parse_opts(int argc, char **argv, struct options *opts) > +{ > + int c; > + > + while ((c = getopt(argc, argv, "s:l:m:v")) != EOF) { > + switch (c) { > + case 's': /* starting point */ > + opts->range->start = get_number(&optarg); > + break; > + case 'l': /* length */ > + opts->range->len = get_number(&optarg); > + break; > + case 'm': /* minlen */ > + opts->range->minlen = get_number(&optarg); > + break; > + case 'v': /* verbose */ > + opts->verbose = 1; > + break; > + default: > + return EXIT_FAILURE; > + } > + } > + > + return 0; > +} > + > +int main(int argc, char **argv) > +{ > + struct options *opts; > + struct stat sb; > + int fd, err = 0, ret = EXIT_FAILURE; > + > + opts = malloc(sizeof(struct options)); > + if (!opts) > + err_exit("%s: malloc(): %s\n", program_name, strerror(errno)); > + > + opts->range = NULL; > + opts->verbose = 0; > + > + if (argc > 1) > + strncpy(opts->mpoint, argv[argc - 1], sizeof(opts->mpoint)); > + > + opts->range = calloc(1, sizeof(struct fstrim_range)); > + if (!opts->range) { > + fprintf(stderr, "%s: calloc(): %s\n", program_name, > + strerror(errno)); > + goto free_opts; > + } > + > + opts->range->len = ULLONG_MAX; > + > + if (argc > 2) > + err = parse_opts(argc, argv, opts); > + > + if (err) { > + usage(); > + goto free_opts; > + } > + > + if (strnlen(opts->mpoint, 1) < 1) { > + fprintf(stderr, "%s: You have to specify mount point.\n", > + program_name); > + usage(); > + goto free_opts; > + } > + > + if (stat(opts->mpoint, &sb) == -1) { > + fprintf(stderr, "%s: %s: %s\n", program_name, > + opts->mpoint, strerror(errno)); > + usage(); > + goto free_opts; > + } > + > + if (!S_ISDIR(sb.st_mode)) { > + fprintf(stderr, "%s: %s: (%s)\n", program_name, > + opts->mpoint, strerror(ENOTDIR)); > + usage(); > + goto free_opts; > + } > + > + fd = open(opts->mpoint, O_RDONLY); > + if (fd < 0) { > + fprintf(stderr, "%s: open(%s): %s\n", program_name, > + opts->mpoint, strerror(errno)); > + goto free_opts; > + } > + > + if (ioctl(fd, FITRIM, opts->range)) { > + fprintf(stderr, "%s: FSTRIM: %s\n", program_name, > + strerror(errno)); > + goto free_opts; > + } > + > + if ((opts->verbose) && (opts->range)) > + fprintf(stdout, "%llu Bytes was trimmed\n", opts->range->len); "Bytes were trimmed," just FWIW > + > + ret = EXIT_SUCCESS; > + > +free_opts: > + if (opts) { > + if (opts->range) > + free(opts->range); > + free(opts); > + } > + > + return ret; > +} From SRS0+rFbk+12+fromorbit.com=david@internode.on.net Thu Dec 9 04:34:22 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9AYLc2233074 for ; Thu, 9 Dec 2010 04:34:22 -0600 X-ASG-Debug-ID: 1291890967-032b03e50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2EC59152AFC6 for ; Thu, 9 Dec 2010 02:36:08 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id yebwcRK5aipmAlQy for ; Thu, 09 Dec 2010 02:36:08 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49518214-1927428 for multiple; Thu, 09 Dec 2010 21:06:07 +1030 (CDT) Received: from dave by dastard with local (Exim 4.71) (envelope-from ) id 1PQdr3-0002Z2-QN; Thu, 09 Dec 2010 21:36:05 +1100 Date: Thu, 9 Dec 2010 21:36:05 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH] xfs: log timestamp changes to the source inode in rename Subject: Re: [PATCH] xfs: log timestamp changes to the source inode in rename Message-ID: <20101209103605.GC29856@dastard> References: <20101207101641.GA25995@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101207101641.GA25995@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1291890970 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48915 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 07, 2010 at 05:16:41AM -0500, Christoph Hellwig wrote: > Now that we don't mark VFS inodes dirty anymore for internal timestamp changes, > but rely on the transaction subsystem to push them out, we need to explicitly > log the source inode in rename after updating it's timestamps to make sure > the changes actually get forced out by sync/fsync or an AIL push. > > We already account for the fourth inode in the log reservation, as a rename > of directories needs to update the nlink field, so just adding the > xfs_trans_log_inode call is enough. > > This fixes the xfsqa 065 regression introduced by: > > "xfs: don't use vfs writeback for pure metadata modifications" > > > Signed-off-by: Christoph Hellwig Looks good. Reviewed-by: Dave Chinner -- Dave Chinner david@fromorbit.com From lczerner@redhat.com Thu Dec 9 05:01:16 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9B1Gqe237089 for ; Thu, 9 Dec 2010 05:01:16 -0600 X-ASG-Debug-ID: 1291892584-46ac00e40000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 669961C9A025 for ; Thu, 9 Dec 2010 03:03:04 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id ED3pvaWjGVHV2tXQ for ; Thu, 09 Dec 2010 03:03:04 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oB9B2wBo012891 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 9 Dec 2010 06:02:58 -0500 Received: from dhcp-lab-213.englab.brq.redhat.com (dhcp-27-109.brq.redhat.com [10.34.27.109]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oB9B2tME007164 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 9 Dec 2010 06:02:56 -0500 Date: Thu, 9 Dec 2010 12:02:52 +0100 (CET) From: Lukas Czerner X-X-Sender: lukas@dhcp-lab-213.englab.brq.redhat.com To: Eric Sandeen cc: Lukas Czerner , xfs@oss.sgi.com, hch@infradead.org, esandeen@redhat.com X-ASG-Orig-Subj: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Subject: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation In-Reply-To: <4D0065E6.6010009@sandeen.net> Message-ID: References: <1290780743-12112-1-git-send-email-lczerner@redhat.com> <4D0065E6.6010009@sandeen.net> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Scanned-By: MIMEDefang 2.67 on 10.5.11.11 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291892585 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, 8 Dec 2010, Eric Sandeen wrote: > On 11/26/10 8:12 AM, Lukas Czerner wrote: > > FITRIM ioctl is used on a mounted filesystem to discard (or "trim") > > blocks which are not in use by the filesystem. This is useful for > > solid-state drives (SSDs) and thinly-provi-sioned storage. This test > > helps to verify filesystem FITRIM implementation to assure that it > > does not corrupts data. > > > > This test creates checksums of all files in /usr/share/doc directory and > > run several processes which clear its working directory on SCRATCH_MNT, > > then copy everything from /usr/share/doc into its working directory, create > > list of files in working directory and its checksums and compare it with the > > original list of checksums. Every process works in the loop so it repeat > > remove->copy->check, while fstrim tool is running simultaneously. > > > > Fstrim is just a helper tool which uses FITRIM ioctl to actually do the > > filesystem discard. > > > > I found this very useful because when the FITRIM is really buggy (thus > > data-destroying) the 248 test will notice, because checksums will most > > likely change. > > > > Signed-off-by: Lukas Czerner -snip- > > + > > +fstrim_loop() > > +{ > > + trap "_destroy_fstrim; exit \$status" 2 15 > > + fsize=$(df | grep $SCRATCH_MNT | grep $SCRATCH_DEV | awk '{print $2}') > > + > > + while true ; do > > + step=1048576 > > + start=0 > > + $here/src/fstrim $SCRATCH_MNT & > > + fpid=$! > > + wait $fpid > > + while [ $start -lt $fsize ] ; do > > + $here/src/fstrim -s ${start}k -l ${step}k $SCRATCH_MNT & > > + fpid=$! > > + wait $fpid > > + start=$(( $start + $step )) > > + done > > I may be dense here but > > a) why do you background and then immediately wait? > b) does this start a whole-device trim followed by several > smaller range-trims? > > I could do with some comments, I suppose. Hi Eric, all the waiting is done because Bash is incredibly stupid. As you know, fstrim_loop is run at background and when the test is over, or when it is killed (with ^C), because of trap, it tries to kill fstrim_loop. However, it does not kill currently running commands, so fstrim might be still running making it impossible to umount the SCRATCH_MNT. So this way, I can kill the running process directly. I believe I am not the first one running into this troubles, so maybe there is a better way ? > > > + done > > +} > > + > > +function check_sums() { > > + dir=$1 > > + > > + ( > > + cd $SCRATCH_MNT/$p > > + find -P . -xdev -type f -print0 | xargs -0 md5sum | sort -o $tmp/stress.$$.$p > > + ) > > + > > + diff $tmp/content.sums $tmp/stress.$$.$p > > + if [ $? -ne 0 ]; then > > + echo "!!!Checksums has changed - Filesystem possibly corrupted!!!\n" > > + kill $mypid > > what is $mypid? Oh right $$ ... why not: > > _fail "!!!Checksums has changed - Filesystem possibly corrupted!!!" oh, that's better, thanks. > > > + fi > > + rm -f $tmp/stress.$$.$p > > +} > > + > > +function run_process() { > > + local p=$1 > > + repeat=10 > > + > > + sleep $((5*$p))s & > > + export chpid=$! && wait $chpid &> /dev/null > > I guess I don't sight-read bash very well. What's going > on with all the backgrounding/waiting here? > > > + chpid=0 > > + > > + while [ $repeat -gt 0 ]; do > > + > > + # Remove old directories. > > + rm -rf $SCRATCH_MNT/$p > > + export chpid=$! && wait $chpid &> /dev/null > > and here? The same thing here, the process will still be running when xfstests will attempt to umount SCRATCH_MNT, resulting in error. This way I can kill it directly. > > > + # Copy content -> partition. > > + mkdir $SCRATCH_MNT/$p > > + cp -ax $content/* $SCRATCH_MNT/$p > > + export chpid=$! && wait $chpid &> /dev/null > > + > > + check_sums > > + repeat=$(( $repeat - 1 )) > > + done > > +} > > + > > +nproc=20 > > +content=/usr/share/doc > > + > > +# Check for FITRIM support > > +echo -n "Checking FITRIM support: " > > +$here/src/fstrim -l 10M $SCRATCH_MNT > > +[ $? -ne 0 ] && exit > > +echo "done." > > + > > +mkdir -p $tmp > > + > > +( > > +cd $content > > +find -P . -xdev -type f -print0 | xargs -0 md5sum | sort -o $tmp/content.sums > > +) > > + > > +echo -n "Running the test: " > > +pids="" > > +fstrim_loop & > > +fstrim_pid=$! > > +p=1 > > +while [ $p -le $nproc ]; do > > + run_process $p & > > + pids="$pids $!" > > + p=$(($p+1)) > > +done > > +echo "done." > > + > > +wait $pids > > +kill $fstrim_pid > > +wait $fstrim_pid > > + > > +status=0 > > +_check_scratch_fs > > Scratch fs should get checked automatically after the test I think? > I guess other tests do this, but I'm not sure it's necessary > unless filesystems are made, remounted, etc in a loop during > the test Ok, I'll get rid of it. > > > +exit > > diff --git a/248.out b/248.out > > new file mode 100644 > > index 0000000..880d9c7 > > --- /dev/null > > +++ b/248.out > > @@ -0,0 +1,3 @@ > > +QA output created by 248 > > +Checking FITRIM support: done. > > +Running the test: done. > > diff --git a/group b/group > > index 0f94dd9..fea84ed 100644 > > --- a/group > > +++ b/group > > @@ -361,3 +361,4 @@ deprecated > > 245 auto quick dir > > 246 auto quick rw > > 247 auto quick rw > > +248 ioctl > > I suppose maybe a trim group would be worthwhile at some point ... Added. > > > diff --git a/src/Makefile b/src/Makefile > > index b827bd0..885fd65 100644 > > --- a/src/Makefile > > +++ b/src/Makefile > > @@ -17,7 +17,7 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ > > preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \ > > locktest unwritten_mmap bulkstat_unlink_test t_stripealign \ > > bulkstat_unlink_test_modified t_dir_offset t_futimens t_immutable \ > > - stale_handle > > + stale_handle fstrim > > > > SUBDIRS = > > > > diff --git a/src/fstrim.c b/src/fstrim.c > > new file mode 100644 > > index 0000000..6686c99 > > --- /dev/null > > +++ b/src/fstrim.c > > @@ -0,0 +1,257 @@ > > +/* > > + * fstrim.c -- discard the part (or whole) of mounted filesystem. > > + * > > + * Copyright (C) 2009 Red Hat, Inc., Lukas Czerner > > 2010 I think :) Hmm, still living in the past :). Thanks for review Eric! -Lukas -snip- From lczerner@redhat.com Thu Dec 9 05:09:38 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9B9cUx238856 for ; Thu, 9 Dec 2010 05:09:38 -0600 X-ASG-Debug-ID: 1291893086-14e303c10000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7B6921D80E8 for ; Thu, 9 Dec 2010 03:11:26 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id 2oaAii4xP99OmyQL for ; Thu, 09 Dec 2010 03:11:26 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oB9BBNYX014336 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 9 Dec 2010 06:11:24 -0500 Received: from dhcp-lab-213.englab.brq.redhat.com (dhcp-27-109.brq.redhat.com [10.34.27.109]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id oB9BBLfg018056 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 9 Dec 2010 06:11:22 -0500 Date: Thu, 9 Dec 2010 12:11:20 +0100 (CET) From: Lukas Czerner X-X-Sender: lukas@dhcp-lab-213.englab.brq.redhat.com To: Lukas Czerner cc: Eric Sandeen , xfs@oss.sgi.com, hch@infradead.org, esandeen@redhat.com X-ASG-Orig-Subj: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Subject: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation In-Reply-To: Message-ID: References: <1290780743-12112-1-git-send-email-lczerner@redhat.com> <4D0065E6.6010009@sandeen.net> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291893087 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, 9 Dec 2010, Lukas Czerner wrote: > On Wed, 8 Dec 2010, Eric Sandeen wrote: > > > On 11/26/10 8:12 AM, Lukas Czerner wrote: > > > FITRIM ioctl is used on a mounted filesystem to discard (or "trim") > > > blocks which are not in use by the filesystem. This is useful for > > > solid-state drives (SSDs) and thinly-provi-sioned storage. This test > > > helps to verify filesystem FITRIM implementation to assure that it > > > does not corrupts data. > > > > > > This test creates checksums of all files in /usr/share/doc directory and > > > run several processes which clear its working directory on SCRATCH_MNT, > > > then copy everything from /usr/share/doc into its working directory, create > > > list of files in working directory and its checksums and compare it with the > > > original list of checksums. Every process works in the loop so it repeat > > > remove->copy->check, while fstrim tool is running simultaneously. > > > > > > Fstrim is just a helper tool which uses FITRIM ioctl to actually do the > > > filesystem discard. > > > > > > I found this very useful because when the FITRIM is really buggy (thus > > > data-destroying) the 248 test will notice, because checksums will most > > > likely change. > > > > > > Signed-off-by: Lukas Czerner > > -snip- > > > > + > > > +fstrim_loop() > > > +{ > > > + trap "_destroy_fstrim; exit \$status" 2 15 > > > + fsize=$(df | grep $SCRATCH_MNT | grep $SCRATCH_DEV | awk '{print $2}') > > > + > > > + while true ; do > > > + step=1048576 > > > + start=0 > > > + $here/src/fstrim $SCRATCH_MNT & > > > + fpid=$! > > > + wait $fpid > > > + while [ $start -lt $fsize ] ; do > > > + $here/src/fstrim -s ${start}k -l ${step}k $SCRATCH_MNT & > > > + fpid=$! > > > + wait $fpid > > > + start=$(( $start + $step )) > > > + done > > > > I may be dense here but > > > > a) why do you background and then immediately wait? > > b) does this start a whole-device trim followed by several > > smaller range-trims? I forgot about this one. The reason for this is, that this way we can get better test coverage of the kernel code, because the code path of smaller trims (especially not ag-aligned) might be slightly different, so we test that case as well. -Lukas > > > > I could do with some comments, I suppose. > > Hi Eric, > > all the waiting is done because Bash is incredibly stupid. As you know, > fstrim_loop is run at background and when the test is over, or when it > is killed (with ^C), because of trap, it tries to kill fstrim_loop. > However, it does not kill currently running commands, so fstrim might be > still running making it impossible to umount the SCRATCH_MNT. > > So this way, I can kill the running process directly. I believe I am not > the first one running into this troubles, so maybe there is a better way > ? > From branto@redhat.com Thu Dec 9 07:03:59 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9D3wWj258219 for ; Thu, 9 Dec 2010 07:03:58 -0600 X-ASG-Debug-ID: 1291899947-46f203da0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 204901CA9E4E for ; Thu, 9 Dec 2010 05:05:47 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id 8fNaJe8Tg6CrEuKD for ; Thu, 09 Dec 2010 05:05:47 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oB9D5kHF021986 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 9 Dec 2010 08:05:46 -0500 Received: from [10.34.26.208] (dhcp-26-208.brq.redhat.com [10.34.26.208]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oB9D5iQn006710 for ; Thu, 9 Dec 2010 08:05:45 -0500 X-ASG-Orig-Subj: xfstests: ignore absolute address in filename in test case 237 Subject: xfstests: ignore absolute address in filename in test case 237 From: Boris Ranto To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 09 Dec 2010 14:05:44 +0100 Message-ID: <1291899944.3196.11.camel@dhcp-31-190.brq.redhat.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.67 on 10.5.11.11 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291899948 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Test case 237 checks for setfacl output. The setfacl can use both relative address or absolute address for filename. Following patch ignores the unnecessary part of absolute address and therefore the test case can pass on systems that output absolute address: diff -urpN a/xfstests/237 b/xfstests/237 --- a/xfstests/237 2010-12-09 11:24:48.587432718 +0100 +++ b/xfstests/237 2010-12-09 13:46:29.008245581 +0100 @@ -72,7 +72,7 @@ touch file1 chown $acl1.$acl1 file1 echo "Expect to FAIL" -$runas -u $acl2 -g $acl2 -- `which setfacl` -m u::rwx file1 2>&1 +$runas -u $acl2 -g $acl2 -- `which setfacl` -m u::rwx file1 2>&1 | sed 's/^setfacl: \/.*file1: Operation not permitted$/setfacl: file1: Operation not permitted/' echo "Test over." # success, all done Signed-off-by: Boris Ranto From lists@nabble.com Thu Dec 9 07:15:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_TO_NO_BRKTS_FREEMAIL autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9DFFld260535 for ; Thu, 9 Dec 2010 07:15:15 -0600 X-ASG-Debug-ID: 1291900623-5a0502c20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from kuber.nabble.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1749B1D8868 for ; Thu, 9 Dec 2010 05:17:03 -0800 (PST) Received: from kuber.nabble.com (kuber.nabble.com [216.139.236.158]) by cuda.sgi.com with ESMTP id VcHcD7PAbIJhwYCS for ; Thu, 09 Dec 2010 05:17:03 -0800 (PST) Received: from isper.nabble.com ([192.168.236.156]) by kuber.nabble.com with esmtp (Exim 4.63) (envelope-from ) id 1PQgMp-0003K0-3B for xfs@oss.sgi.com; Thu, 09 Dec 2010 05:17:03 -0800 Message-ID: <30416394.post@talk.nabble.com> Date: Thu, 9 Dec 2010 05:17:03 -0800 (PST) From: blacknred To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors In-Reply-To: <4D005E99.2030400@sandeen.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Nabble-From: leo1783@hotmail.co.uk References: <30397503.post@talk.nabble.com> <20101207222558.GC29333@dastard> <30403823.post@talk.nabble.com> <20101209005944.GD32766@dastard> <4D005E99.2030400@sandeen.net> X-Barracuda-Connect: kuber.nabble.com[216.139.236.158] X-Barracuda-Start-Time: 1291900624 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48924 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean >which is NOT a rhel 5.0 kernel, and it says x86_64. >But the addresses are all 32 bits? My apologies there, somehow it all got jumbled up, pasting it again: BUG: unable to handle kernel NULL pointer dereference at virtual address 00000098 printing eip: *pde = 2c621001 Oops: 0000 [#1] SMP CPU: 2 EIP: 0060:[] Tainted: GF VLI EFLAGS: 00010282 (2.6.18-164.11.1.el5PAE #1) EIP is at do_page_fault+0x205/0x607 eax: ec6de000 ebx: 00000000 ecx: ec6de074 edx: 0000000d esi: 00014005 edi: ec6de0a4 ebp: 00000014 esp: ec6de054 ds: 007b es: 007b ss: 0068 Process bm (pid: 2910, ti=ec6dd000 task=ec6e3550 task.ti=ec6dd000) Stack: 00000000 00000000 ec6de0a4 00000014 00000098 f7180000 00000001 00000000 ec6de0a4 c0639439 00000000 0000000e 0000000b 00000000 00000000 00000000 00014005 c0619b9c 00000014 c0405a89 00000000 ec6de0f8 0000000d 00014005 Call Trace: [] do_page_fault+0x0/0x607 [] error_code+0x39/0x40 [] do_page_fault+0x205/0x607 [] elv_next_request+0x127/0x134 [] do_cciss_request+0x398/0x3a3 [cciss] [] do_page_fault+0x0/0x607 [] error_code+0x39/0x40 [] do_page_fault+0x205/0x607 [] deadline_set_request+0x16/0x57 [] do_page_fault+0x0/0x607 [] error_code+0x39/0x40 [] do_page_fault+0x205/0x607 [] do_page_fault+0x0/0x607 [] error_code+0x39/0x40 [] do_page_fault+0x205/0x607 [] do_page_fault+0x0/0x607 [] error_code+0x39/0x40 [] __down+0x2b/0xbb [] default_wake_function+0x0/0xc [] __down_failed+0x7/0xc [] .text.lock.xfs_buf+0x17/0x5f [xfs] [] xfs_buf_read_flags+0x48/0x76 [xfs] [] xfs_trans_read_buf+0x1bb/0x2c0 [xfs] [] xfs_btree_read_bufl+0x96/0xb3 [xfs] [] xfs_bmbt_lookup+0x135/0x478 [xfs] [] xfs_bmap_add_extent+0xd2b/0x1e30 [xfs] [] xfs_alloc_update+0x3a/0xbc [xfs] [] xfs_alloc_fixup_trees+0x217/0x29a [xfs] [] xfs_trans_log_buf+0x49/0x6c [xfs] [] xfs_alloc_search_busy+0x20/0xae [xfs] [] xfs_iext_bno_to_ext+0xd8/0x191 [xfs] [] kmem_zone_zalloc+0x1d/0x41 [xfs] [] xfs_bmapi+0x15fe/0x2016 [xfs] [] xfs_iext_bno_to_ext+0x48/0x191 [xfs] [] xfs_bmap_search_multi_extents+0x8a/0xc5 [xfs] [] xfs_iomap_write_allocate+0x29c/0x469 [xfs] [] lock_timer_base+0x15/0x2f [] del_timer+0x41/0x47 [] xfs_iomap+0x409/0x71d [xfs] [] xfs_map_blocks+0x29/0x52 [xfs] [] xfs_page_state_convert+0x37b/0xd2e [xfs] [] xfs_bmap_add_extent+0x1dcf/0x1e30 [xfs] [] xfs_bmap_search_multi_extents+0x8a/0xc5 [xfs] [] xfs_bmapi+0x272/0x2016 [xfs] [] xfs_bmapi+0x1853/0x2016 [xfs] [] find_get_pages_tag+0x30/0x75 [] xfs_vm_writepage+0x8f/0xc2 [xfs] [] mpage_writepages+0x1a7/0x310 [] xfs_vm_writepage+0x0/0xc2 [xfs] [] do_writepages+0x20/0x32 [] __writeback_single_inode+0x170/0x2af [] write_inode_now+0x66/0xa7 [] file_fsync+0xf/0x6c [] moddw_ioctl+0x420/0x669 [mod_dw] [] __cond_resched+0x16/0x34 [] do_ioctl+0x47/0x5d [] vfs_ioctl+0x47b/0x4d3 [] sys_ioctl+0x48/0x5f [] sysenter_past_esp+0x56/0x79 Thanks, sorry for the confusion.... Eric Sandeen-3 wrote: > > On 12/8/10 6:59 PM, Dave Chinner wrote: >> On Wed, Dec 08, 2010 at 01:39:10AM -0800, blacknred wrote: >>> >>> >>>> You've done a forced module load. No guarantee your kernel is in any >>>> sane shape if you've done that.... >>> >>> Agree, but I'm reasonably convinced that module isn't the issue, because >>> it >>> works fine with my other servers...... >>> >>>> Strange failure. Hmmm - i386 arch and fedora - are you running with >>> 4k stacks? If so, maybe it blew the stack... >>> >>> i386 arch, rhel 5.0 >> >> Yup, 4k stacks. This is definitely smelling like a stack blowout. > > well, hang on. The oops said: > > EIP: 0060:[] Tainted: GF VLI > EFLAGS: 00010272 (2.6.33.3-85.fc13.x86_64 #1) > EIP is at do_page_fault+0x245/0x617 > eax: ec5ee000 ebx: 00000000 ecx: eb5de084 edx: 0000000e > esi: 00013103 edi: ec5de0b3 ebp: 00000023 esp: ec5de024 > ds: 008b es: 008b ss: 0078 > > which is NOT a rhel 5.0 kernel, and it says x86_64. > > But the addresses are all 32 bits? > > So what's going on here? > >> esi: 00013103 edi: ec5de0b3 ebp: 00000023 esp: ec5de024 >> ds: 008b es: 008b ss: 0078 >> Process bm (pid: 3210, ti=ec622000 task=ec5e3450 task.ti=ec6ee000) > > end of the stack is ec6ee000, stack grows up, esp is at ec5de024, > well past it (i.e. yes, overrun) if I remember my stack math > right... but that's a pretty huge difference so either I have it > wrong, or things are really a huge mess here. > > -Eric > > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs > > -- View this message in context: http://old.nabble.com/kernel-panic-xfs-errors-tp30397503p30416394.html Sent from the Xfs - General mailing list archive at Nabble.com. From lists@nabble.com Thu Dec 9 07:21:47 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_TO_NO_BRKTS_FREEMAIL autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9DLlmc001433 for ; Thu, 9 Dec 2010 07:21:47 -0600 X-ASG-Debug-ID: 1291901015-5fa103620000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from kuber.nabble.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E9A791E974D8 for ; Thu, 9 Dec 2010 05:23:35 -0800 (PST) Received: from kuber.nabble.com (kuber.nabble.com [216.139.236.158]) by cuda.sgi.com with ESMTP id 7CXP3s18Os9H1E4U for ; Thu, 09 Dec 2010 05:23:35 -0800 (PST) Received: from isper.nabble.com ([192.168.236.156]) by kuber.nabble.com with esmtp (Exim 4.63) (envelope-from ) id 1PQgT9-0003nW-1s for xfs@oss.sgi.com; Thu, 09 Dec 2010 05:23:35 -0800 Message-ID: <30416451.post@talk.nabble.com> Date: Thu, 9 Dec 2010 05:23:35 -0800 (PST) From: blacknred To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors In-Reply-To: <20101209005944.GD32766@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Nabble-From: leo1783@hotmail.co.uk References: <30397503.post@talk.nabble.com> <20101207222558.GC29333@dastard> <30403823.post@talk.nabble.com> <20101209005944.GD32766@dastard> X-Barracuda-Connect: kuber.nabble.com[216.139.236.158] X-Barracuda-Start-Time: 1291901015 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48926 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean >Is the version 7.x firmware certified with such an old kernel? Yes, it is... It hung again today and dmesg said XFS: bad magic number XFS: SB validate failed But when I do dd if=/dev/cciss/c0d0 bs=512 count=1 |od -c I get below which suggests its a valid XFS superblock magic number as per your reply, correct? I couldn't unmount the partition to do a xfs_repair -n 1+0 records in 1+0 records out 0000000 X F S B \0 \0 020 \0 \0 \0 \0 \0 + 251 262 ^ 512 bytes (512 B) copied0000020 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 0000040 354 B \b 277 ) 376 @ 333 267 232 304 326 * L 344 322 0000060 \0 \0 \0 \0 \0 \0 @ \0 \0 \0 \0 \0 \0 \0 200 0000100 \0 \0 \0 \0 \0 \0 \0 201 \0 \0 \0 \0 \0 \0 \0 202 0000120 \0 \0 \0 001 \n 352 l 300 \0 \0 \0 004 \0 \0 \0 \0 , 0.000190895 seconds, 2.7 MB/s 0000140 \0 \0 200 \0 265 244 002 \0 \b \0 \0 002 \0 \0 \0 \0 0000160 \0 \0 \0 \0 \0 \0 \0 \0 \b \t \v 001 034 \0 \0 005 0000200 \0 \0 \0 \0 \0 \0 \v \0 \0 \0 \0 \0 \0 \0 \t . 0000220 \0 \0 \0 \0 030 243 275 267 \0 \0 \0 \0 \0 \0 \0 \0 0000240 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 0000260 \0 \0 \0 \0 \0 \0 \0 002 \0 \0 \0 @ \0 \0 001 \0 0000300 \0 \0 \0 \0 \0 004 \0 \0 \0 \0 \0 \b \0 \0 \0 \b 0000320 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 \0 * 0001000 Dave Chinner wrote: > > On Wed, Dec 08, 2010 at 01:39:10AM -0800, blacknred wrote: >> >> >> >You've done a forced module load. No guarantee your kernel is in any >> >sane shape if you've done that.... >> >> Agree, but I'm reasonably convinced that module isn't the issue, because >> it >> works fine with my other servers...... >> >> >Strange failure. Hmmm - i386 arch and fedora - are you running with >> 4k stacks? If so, maybe it blew the stack... >> >> i386 arch, rhel 5.0 > > Yup, 4k stacks. This is definitely smelling like a stack blowout. > > XFS on 4k stacks is a ticking timebomb - it will explode and you've > got no idea of when it will go boom. Recompile your kernel with 8k > stacks or move to x86_64. > >> ># dd if= bs=512 count=1 | od -c >> This is what i get now, but now server's been rebooted and running OK, >> what >> should i be expecting or rather what are we looking for in this output at >> point of failure? > > Well, what you see here: > >> 0000000 X F S B \0 \0 020 \0 \0 \0 \0 \0 025 324 304 \0 > ^^^^^^^^^^^^^ > Is a valid XFS superblock magic number. > > If you are getting this error: > >> >> XFS: bad magic number >> >> XFS: SB validate failed > > Then I'd expect to see anything other than "XFSB" as the magic > number. Of course, if you smashed the stack during mount, then there > will most likely be nothing wrong with the value on disk... > >> >why did I flash the controller >> I was on 5.22 fw version which has a known 'lockup' issue which is fixed >> in >> 7.x ver. >> This is a critical fix. > > Is the version 7.x firmware certified with such an old kernel? It's > not uncommon for different firmware versions to only be supported on > specific releases/kernel versions. > > Cheers, > > Dave. > -- > Dave Chinner > david@fromorbit.com > > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs > > -- View this message in context: http://old.nabble.com/kernel-panic-xfs-errors-tp30397503p30416451.html Sent from the Xfs - General mailing list archive at Nabble.com. From branto@redhat.com Thu Dec 9 07:39:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9Dd046008000 for ; Thu, 9 Dec 2010 07:39:01 -0600 X-ASG-Debug-ID: 1291902049-5fa803c70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2575E1E97855 for ; Thu, 9 Dec 2010 05:40:49 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id doEind54yKDS33GZ for ; Thu, 09 Dec 2010 05:40:49 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oB9DemXI027963 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 9 Dec 2010 08:40:49 -0500 Received: from [10.34.26.208] (dhcp-26-208.brq.redhat.com [10.34.26.208]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oB9DelMI016524 for ; Thu, 9 Dec 2010 08:40:48 -0500 X-ASG-Orig-Subj: Re: xfstests: ignore absolute address in filename in test case 237 Subject: Re: xfstests: ignore absolute address in filename in test case 237 From: Boris Ranto To: xfs@oss.sgi.com In-Reply-To: <1291899944.3196.11.camel@dhcp-31-190.brq.redhat.com> References: <1291899944.3196.11.camel@dhcp-31-190.brq.redhat.com> Content-Type: text/plain; charset="UTF-8" Date: Thu, 09 Dec 2010 14:40:47 +0100 Message-ID: <1291902047.3196.26.camel@dhcp-31-190.brq.redhat.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.67 on 10.5.11.11 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291902050 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, 2010-12-09 at 14:05 +0100, Boris Ranto wrote: > Test case 237 checks for setfacl output. The setfacl can use both > relative address or absolute address for filename. > > Following patch ignores the unnecessary part of absolute address and > therefore the test case can pass on systems that output absolute > address: > > diff -urpN a/xfstests/237 b/xfstests/237 > --- a/xfstests/237 2010-12-09 11:24:48.587432718 +0100 > +++ b/xfstests/237 2010-12-09 13:46:29.008245581 +0100 > @@ -72,7 +72,7 @@ touch file1 > chown $acl1.$acl1 file1 > > echo "Expect to FAIL" > -$runas -u $acl2 -g $acl2 -- `which setfacl` -m u::rwx file1 2>&1 > +$runas -u $acl2 -g $acl2 -- `which setfacl` -m u::rwx file1 2>&1 | sed 's/^setfacl: \/.*file1: Operation not permitted$/setfacl: file1: Operation not permitted/' > > echo "Test over." > # success, all done > > Signed-off-by: Boris Ranto I noticed that text is usually filtered in a little different way therefore I'd rather suggest the following patch: diff -urpN a/xfstests/237 b/xfstests/237 --- a/xfstests/237 2010-12-09 11:24:48.587432718 +0100 +++ b/xfstests/237 2010-12-09 14:24:09.463402051 +0100 @@ -47,6 +47,11 @@ _cleanup() _cleanup_testdir } +# Allow absolute path in setfacl output +_filter_absolute_path() +{ + sed 's/^setfacl: \/.*file1: Operation not permitted$/setfacl: file1: Operation not permitted/' +} # real QA test starts here _supported_fs generic # only Linux supports fallocate @@ -72,7 +77,7 @@ touch file1 chown $acl1.$acl1 file1 echo "Expect to FAIL" -$runas -u $acl2 -g $acl2 -- `which setfacl` -m u::rwx file1 2>&1 +$runas -u $acl2 -g $acl2 -- `which setfacl` -m u::rwx file1 2>&1 | _filter_absolute_path echo "Test over." # success, all done From branto@redhat.com Thu Dec 9 08:38:26 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_34 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9EcPXu017339 for ; Thu, 9 Dec 2010 08:38:26 -0600 X-ASG-Debug-ID: 1291905614-610001ad0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 5E3CC1D8A10 for ; Thu, 9 Dec 2010 06:40:14 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id LqB3eRtOQPH79z6f for ; Thu, 09 Dec 2010 06:40:14 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oB9EeEFB015374 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 9 Dec 2010 09:40:14 -0500 Received: from [10.34.26.208] (dhcp-26-208.brq.redhat.com [10.34.26.208]) by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oB9EeDLZ008302 for ; Thu, 9 Dec 2010 09:40:13 -0500 X-ASG-Orig-Subj: xfstests: fix 108 through config mechanism Subject: xfstests: fix 108 through config mechanism From: Boris Ranto To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 09 Dec 2010 15:40:12 +0100 Message-ID: <1291905612.3196.49.camel@dhcp-31-190.brq.redhat.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.67 on 10.5.11.12 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291905615 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Test case 108 can fail beacuse of the incorrect amount of spaces in its output. This can be overrided by passing -b option to diff (quotation of man page): -b --ignore-space-change Ignore changes in the amount of white space. Since there is currently no mechanism to pass any option to diff I suggest following mechanism: Every test can have its config file ($sef.config) where all its test-run configuration can be stored. Also it should contain variable CONFIG_OPTIONS that specifies what options are created/modified. The check script'll only source the config file if it exists and unset all the modified variables that are listed in CONFIG_OPTIONS variable once they're not needed. This configuration mechanism could (with additional patch to the file check) also help handle multiple output files that might be beneficial in few test cases. Patch that fixes test case 108 and adds described mechanism of test configuration: diff -urpN a/xfstests/108.config b/xfstests/108.config --- a/xfstests/108.config 1970-01-01 01:00:00.000000000 +0100 +++ b/xfstests/108.config 2010-12-09 11:24:51.626367533 +0100 @@ -0,0 +1,2 @@ +export CONFIG_OPTIONS="DIFF_OPTIONS CONFIG_OPTIONS" +export DIFF_OPTIONS="-b" diff -urpN a/xfstests/check b/xfstests/check --- a/xfstests/check 2010-12-09 11:34:26.709247611 +0100 +++ b/xfstests/check 2010-12-09 11:37:13.857370558 +0100 @@ -226,6 +226,11 @@ do else # really going to try and run this one # + CONFIG_OPTIONS="CONFIG_OPTIONS" + if [ -f $seq.config ] + then + source $seq.config + fi rm -f $seq.out.bad lasttime=`sed -n -e "/^$seq /s/.* //p" /dev/null 2>&1 + if diff $DIFF_OPTIONS $seq.out $tmp.out >/dev/null 2>&1 then if $err then @@ -286,12 +291,12 @@ do else echo " - output mismatch (see $seq.out.bad)" mv $tmp.out $seq.out.bad - $diff $seq.out $seq.out.bad + $diff $DIFF_OPTIONS $seq.out $seq.out.bad err=true fi fi fi - + unset $CONFIG_OPTIONS fi # come here for each test, except when $showme is true Signed-off-by: Boris Ranto From sandeen@sandeen.net Thu Dec 9 08:55:03 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_42 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9Et1RR020314 for ; Thu, 9 Dec 2010 08:55:03 -0600 X-ASG-Debug-ID: 1291906609-6ac603010000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 56E221E97C4F for ; Thu, 9 Dec 2010 06:56:49 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id q0SbsOPDLLkNEB4r for ; Thu, 09 Dec 2010 06:56:49 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id D4DB44817CFA; Thu, 9 Dec 2010 08:56:48 -0600 (CST) Message-ID: <4D00EE30.2000408@sandeen.net> Date: Thu, 09 Dec 2010 08:56:48 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: blacknred CC: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: kernel panic-xfs errors Subject: Re: kernel panic-xfs errors References: <30397503.post@talk.nabble.com> <20101207222558.GC29333@dastard> <30403823.post@talk.nabble.com> <20101209005944.GD32766@dastard> <4D005E99.2030400@sandeen.net> <30416394.post@talk.nabble.com> In-Reply-To: <30416394.post@talk.nabble.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1291906610 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_SA210e, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48932 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.00 BSF_SC5_SA210e Custom Rule SA210e X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/9/10 7:17 AM, blacknred wrote: > >> which is NOT a rhel 5.0 kernel, and it says x86_64. >> But the addresses are all 32 bits? > > My apologies there, somehow it all got jumbled up, pasting it again: > > BUG: unable to handle kernel NULL pointer dereference at virtual address > 00000098 > printing eip: > *pde = 2c621001 > Oops: 0000 [#1] > SMP > CPU: 2 > EIP: 0060:[] Tainted: GF VLI > EFLAGS: 00010282 (2.6.18-164.11.1.el5PAE #1) > EIP is at do_page_fault+0x205/0x607 > eax: ec6de000 ebx: 00000000 ecx: ec6de074 edx: 0000000d > esi: 00014005 edi: ec6de0a4 ebp: 00000014 esp: ec6de054 > ds: 007b es: 007b ss: 0068 > Process bm (pid: 2910, ti=ec6dd000 task=ec6e3550 task.ti=ec6dd000) > Stack: 00000000 00000000 ec6de0a4 00000014 00000098 f7180000 00000001 > 00000000 > ec6de0a4 c0639439 00000000 0000000e 0000000b 00000000 00000000 > 00000000 > 00014005 c0619b9c 00000014 c0405a89 00000000 ec6de0f8 0000000d > 00014005 ok, same task.ti and esp though, so same massive stack overflow. Is this really RHEL, or CentOS? RHEL doesn't ship xfs for i386, and using the xfs-kmod is a very unsupported/unmaintained solution. If it is "real RHEL" you could try requesting actual i386 support, but these stack issues are one of the reasons it's unlikely. CentOS would do well to ship the same xfs code as is in the x86_64 kernel and drop the kmod-xfs altogether. Some stack issues have been resolved since then, but probably not as much as we see here. I also am suspicious of whatever "moddw_ioctl" is in mod_dw; I assume that's the proprietary kernel module. It may have a really bad stack footprint, although the callchain below looks bad enough. What does: # objdump -d /path/to/mod_dw.ko | grep -A30 ":" | grep sub say? -Eric From john@stoffel.org Thu Dec 9 09:04:25 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9F4PR0022071 for ; Thu, 9 Dec 2010 09:04:25 -0600 X-ASG-Debug-ID: 1291907172-64ae02530000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mycroft.westnet.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DA9031D8BD5; Thu, 9 Dec 2010 07:06:12 -0800 (PST) Received: from mycroft.westnet.com (Mycroft.westnet.com [216.187.52.7]) by cuda.sgi.com with ESMTP id X7cj7RLCOjsrRgTN; Thu, 09 Dec 2010 07:06:12 -0800 (PST) Received: from jfsnew.stoffel.org (97-95-180-151.dhcp.oxfr.ma.charter.com [97.95.180.151]) (authenticated bits=0) by mycroft.westnet.com (8.14.4/8.14.4) with ESMTP id oB9F5Dxn022512 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 9 Dec 2010 10:05:14 -0500 (EST) Received: by jfsnew.stoffel.org (Postfix, from userid 1000) id 5EA90A073D; Thu, 9 Dec 2010 10:05:47 -0500 (EST) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <19712.61515.201226.938553@quad.stoffel.home> Date: Thu, 9 Dec 2010 10:05:47 -0500 From: "John Stoffel" To: Eric Paris Cc: xfs-masters@oss.sgi.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, cluster-devel@redhat.com, linux-mtd@lists.infradead.org, jfs-discussion@lists.sourceforge.net, ocfs2-devel@oss.oracle.com, reiserfs-devel@vger.kernel.org, xfs@oss.sgi.com, linux-mm@kvack.org, linux-security-module@vger.kernel.org, chris.mason@oracle.com, jack@suse.cz, akpm@linux-foundation.org, adilger.kernel@dilger.ca, tytso@mit.edu, swhiteho@redhat.com, dwmw2@infradead.org, shaggy@linux.vnet.ibm.com, mfasheh@suse.com, joel.becker@oracle.com, aelder@sgi.com, hughd@google.com, jmorris@namei.org, sds@tycho.nsa.gov, eparis@parisplace.org, hch@lst.de, dchinner@redhat.com, viro@zeniv.linux.org.uk, tao.ma@oracle.com, shemminger@vyatta.com, jeffm@suse.com, serue@us.ibm.com, paul.moore@hp.com, penguin-kernel@I-love.SAKURA.ne.jp, casey@schaufler-ca.com, kees.cook@canonical.com, dhowells@redhat.com X-ASG-Orig-Subj: Re: [PATCH] fs/vfs/security: pass last path component to LSM on inode creation Subject: Re: [PATCH] fs/vfs/security: pass last path component to LSM on inode creation In-Reply-To: <20101208194527.13537.77202.stgit@paris.rdu.redhat.com> References: <20101208194527.13537.77202.stgit@paris.rdu.redhat.com> X-Mailer: VM 8.1.1 under 23.2.1 (x86_64-pc-linux-gnu) X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Scanned: clamav-milter 0.96.5 at mycroft X-Virus-Status: Clean X-Barracuda-Connect: Mycroft.westnet.com[216.187.52.7] X-Barracuda-Start-Time: 1291907173 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48932 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- >>>>> "Eric" == Eric Paris writes: Eric> SELinux would like to implement a new labeling behavior of newly Eric> created inodes. We currently label new inodes based on the Eric> parent and the creating process. This new behavior would also Eric> take into account the name of the new object when deciding the Eric> new label. This is not the (supposed) full path, just the last Eric> component of the path. Eric> This is very useful because creating /etc/shadow is different Eric> than creating /etc/passwd but the kernel hooks are unable to Eric> differentiate these operations. We currently require that Eric> userspace realize it is doing some difficult operation like that Eric> and than userspace jumps through SELinux hoops to get things set Eric> up correctly. This patch does not implement new behavior, that Eric> is obviously contained in a seperate SELinux patch, but it does Eric> pass the needed name down to the correct LSM hook. If no such Eric> name exists it is fine to pass NULL. I've looked this patch over, and maybe I'm missing something, but how does knowing the name of the file really tell you anything, esp when you only get the filename, not the path? What threat are you addressing with this change? So what happens when I create a file /home/john/shadow, does selinux (or LSM in general) then run extra checks because the filename is 'shadow' in your model? I *think* the overhead shouldn't be there if SELINUX is disabled, but have you confirmed this? How you run performance tests before/after this change when doing lots of creations of inodes to see what sort of performance changes might be there? Thanks, John From yad.naveen@gmail.com Thu Dec 9 09:30:29 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_DKIM_INVALID,T_TO_NO_BRKTS_FREEMAIL autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9FUTnH026129 for ; Thu, 9 Dec 2010 09:30:29 -0600 X-ASG-Debug-ID: 1291908737-239602170000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-vw0-f53.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 52C5C1435C5F for ; Thu, 9 Dec 2010 07:32:17 -0800 (PST) Received: from mail-vw0-f53.google.com (mail-vw0-f53.google.com [209.85.212.53]) by cuda.sgi.com with ESMTP id fWaDZ5Q7aCWz3IPL for ; Thu, 09 Dec 2010 07:32:17 -0800 (PST) Received: by vws8 with SMTP id 8so1723779vws.26 for ; Thu, 09 Dec 2010 07:32:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=kc0vkT6SAqI5zUUcidzQwdq4GtCatsuUKBMZ97Krq18=; b=Il8D8135kn2m3ux+uJFonJCjTd9HawYAJRY4Scv1+LNRbpWk6tpJNrCngSSZNKHg65 0ho2tRN3vgcCvw2KDo6GQPyD6wMcquUkvA/49Mhx8VwdtKSZdTqbOzjCHsFEAl+qcmSh fgTAX+7VuPG+mfkqyf47kl7L+Yw1TOWYahp2I= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=Fpi7tlVX0EsMdivCm7UWpqTfnIudnPX6DcjUGMolBY2y5RO9BxduuUWSl7K/s8seRt 4FSmNMo+TN7ZxvO5X/8CivSfICGvjmqsrSdMEFRwtVjkD/Og8xDJ1hOZmiy9PXr3wTmX ZKCAO+kh8MFuvfuxuvaZPTT9Q5t+M70YsBdfo= MIME-Version: 1.0 Received: by 10.229.246.83 with SMTP id lx19mr3179304qcb.210.1291908736123; Thu, 09 Dec 2010 07:32:16 -0800 (PST) Received: by 10.229.75.13 with HTTP; Thu, 9 Dec 2010 07:32:15 -0800 (PST) Date: Thu, 9 Dec 2010 21:02:15 +0530 Message-ID: X-ASG-Orig-Subj: XFS Testsuite Subject: XFS Testsuite From: naveen yadav To: xfs@oss.sgi.com Content-Type: text/plain; charset=ISO-8859-1 X-Barracuda-Connect: mail-vw0-f53.google.com[209.85.212.53] X-Barracuda-Start-Time: 1291908738 X-Barracuda-Bayes: INNOCENT GLOBAL 0.2213 1.0000 -0.7176 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.72 X-Barracuda-Spam-Status: No, SCORE=-0.72 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48933 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hi all, I want to setup XFS testsuite for my embedded ARM Target, Is it possible ? If any body have already done, Please help me. I am trying but there are lots of constrain and problem Thanks From eparis@redhat.com Thu Dec 9 09:52:51 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9FqpMs029997 for ; Thu, 9 Dec 2010 09:52:51 -0600 X-ASG-Debug-ID: 1291910079-17da03a50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 73DFA14343F3; Thu, 9 Dec 2010 07:54:39 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id oPNSgEVerTZ5EQgE; Thu, 09 Dec 2010 07:54:39 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oB9FqVs9030130 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 9 Dec 2010 10:52:31 -0500 Received: from [10.11.231.139] (dhcp231-139.rdu.redhat.com [10.11.231.139]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id oB9FqMN9030453; Thu, 9 Dec 2010 10:52:22 -0500 X-ASG-Orig-Subj: Re: [PATCH] fs/vfs/security: pass last path component to LSM on inode creation Subject: Re: [PATCH] fs/vfs/security: pass last path component to LSM on inode creation From: Eric Paris To: John Stoffel Cc: xfs-masters@oss.sgi.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, cluster-devel@redhat.com, linux-mtd@lists.infradead.org, jfs-discussion@lists.sourceforge.net, ocfs2-devel@oss.oracle.com, reiserfs-devel@vger.kernel.org, xfs@oss.sgi.com, linux-mm@kvack.org, linux-security-module@vger.kernel.org, chris.mason@oracle.com, jack@suse.cz, akpm@linux-foundation.org, adilger.kernel@dilger.ca, tytso@mit.edu, swhiteho@redhat.com, dwmw2@infradead.org, shaggy@linux.vnet.ibm.com, mfasheh@suse.com, joel.becker@oracle.com, aelder@sgi.com, hughd@google.com, jmorris@namei.org, sds@tycho.nsa.gov, eparis@parisplace.org, hch@lst.de, dchinner@redhat.com, viro@zeniv.linux.org.uk, tao.ma@oracle.com, shemminger@vyatta.com, jeffm@suse.com, paul.moore@hp.com, penguin-kernel@I-love.SAKURA.ne.jp, casey@schaufler-ca.com, kees.cook@canonical.com, dhowells@redhat.com In-Reply-To: <19712.61515.201226.938553@quad.stoffel.home> References: <20101208194527.13537.77202.stgit@paris.rdu.redhat.com> <19712.61515.201226.938553@quad.stoffel.home> Content-Type: text/plain; charset="UTF-8" Date: Thu, 09 Dec 2010 10:52:21 -0500 Message-ID: <1291909941.3072.70.camel@localhost.localdomain> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291910080 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, 2010-12-09 at 10:05 -0500, John Stoffel wrote: > >>>>> "Eric" == Eric Paris writes: > So what happens when I create a file /home/john/shadow, does selinux > (or LSM in general) then run extra checks because the filename is > 'shadow' in your model? It's entirely a question of labeling and one that was discussed on the LSM list in some detail: http://marc.info/?t=129141308200002&r=1&w=2 The basic synopsis is that when a new inode is created SELinux must apply some label. It makes the decision for what label to apply based on 3 pieces of information. The label of the parent inode. The label of the process creating the new inode. The 'class' of the inode, S_ISREG, S_ISDIR, S_ISLNK, etc This patch adds a 4th piece of information, the name of the object being created. An obvious situation where this will be useful is devtmpfs (although you'll find other examples in the above thread). devtmpfs when it creates char/block devices is unable to distinguish between kmem and console and so they are created with a generic label. hotplug/udev is then called which does some pathname like matching and relabels them to something more specific. We've found that many people are able to race against this particular updating and get spurious denials in /dev. With this patch devtmpfs will be able to get the labels correct to begin with. I'm certainly willing to discuss the security implications of this patch, but that would probably be best done with a significantly shortened cc-list. You'll see in the above mentioned thread that a number of 'security' people (even those who are staunchly anti-SELinux) recognize there is value in this and that it is certainly much better than we have today. > I *think* the overhead shouldn't be there if SELINUX is disabled, but > have you confirmed this? How you run performance tests before/after > this change when doing lots of creations of inodes to see what sort of > performance changes might be there? I've actually recently done some perf testing on creating large numbers of inodes using bonnie++, since SELinux was a noticeable overhead in that operation. Doing that same test with SELinux disabled (or enabled) I do not see a noticeable difference when this patch is applied or not. It's just an extra argument to a function that goes unused. -Eric From serge.hallyn@canonical.com Thu Dec 9 10:04:32 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9G4Wap032174 for ; Thu, 9 Dec 2010 10:04:32 -0600 X-ASG-Debug-ID: 1291910780-4f0f004f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from adelie.canonical.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 168E51D8F0E; Thu, 9 Dec 2010 08:06:20 -0800 (PST) Received: from adelie.canonical.com (adelie.canonical.com [91.189.90.139]) by cuda.sgi.com with ESMTP id orYmieJYxgitvNBy; Thu, 09 Dec 2010 08:06:20 -0800 (PST) Received: from hutte.canonical.com ([91.189.90.181]) by adelie.canonical.com with esmtp (Exim 4.69 #1 (Debian)) id 1PQj0K-0003ei-O3; Thu, 09 Dec 2010 16:06:02 +0000 Received: from [64.202.139.114] (helo=peq) by hutte.canonical.com with esmtpsa (TLS-1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.69) (envelope-from ) id 1PQj0J-0006Ab-KJ; Thu, 09 Dec 2010 16:06:00 +0000 Date: Thu, 9 Dec 2010 10:05:49 -0600 From: Serge Hallyn To: John Stoffel Cc: Eric Paris , xfs-masters@oss.sgi.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, cluster-devel@redhat.com, linux-mtd@lists.infradead.org, jfs-discussion@lists.sourceforge.net, ocfs2-devel@oss.oracle.com, reiserfs-devel@vger.kernel.org, xfs@oss.sgi.com, linux-mm@kvack.org, linux-security-module@vger.kernel.org, chris.mason@oracle.com, jack@suse.cz, akpm@linux-foundation.org, adilger.kernel@dilger.ca, tytso@mit.edu, swhiteho@redhat.com, dwmw2@infradead.org, shaggy@linux.vnet.ibm.com, mfasheh@suse.com, joel.becker@oracle.com, aelder@sgi.com, hughd@google.com, jmorris@namei.org, sds@tycho.nsa.gov, eparis@parisplace.org, hch@lst.de, dchinner@redhat.com, viro@zeniv.linux.org.uk, tao.ma@oracle.com, shemminger@vyatta.com, jeffm@suse.com, serue@us.ibm.com, paul.moore@hp.com, penguin-kernel@I-love.SAKURA.ne.jp, casey@schaufler-ca.com, kees.cook@canonical.com, dhowells@redhat.com X-ASG-Orig-Subj: Re: [PATCH] fs/vfs/security: pass last path component to LSM on inode creation Subject: Re: [PATCH] fs/vfs/security: pass last path component to LSM on inode creation Message-ID: <20101209160549.GA2315@peq> References: <20101208194527.13537.77202.stgit@paris.rdu.redhat.com> <19712.61515.201226.938553@quad.stoffel.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <19712.61515.201226.938553@quad.stoffel.home> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: adelie.canonical.com[91.189.90.139] X-Barracuda-Start-Time: 1291910781 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48936 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Quoting John Stoffel (john@stoffel.org): > >>>>> "Eric" == Eric Paris writes: > > Eric> SELinux would like to implement a new labeling behavior of newly > Eric> created inodes. We currently label new inodes based on the > Eric> parent and the creating process. This new behavior would also > Eric> take into account the name of the new object when deciding the > Eric> new label. This is not the (supposed) full path, just the last > Eric> component of the path. > > Eric> This is very useful because creating /etc/shadow is different > Eric> than creating /etc/passwd but the kernel hooks are unable to > Eric> differentiate these operations. We currently require that > Eric> userspace realize it is doing some difficult operation like that > Eric> and than userspace jumps through SELinux hoops to get things set > Eric> up correctly. This patch does not implement new behavior, that > Eric> is obviously contained in a seperate SELinux patch, but it does > Eric> pass the needed name down to the correct LSM hook. If no such > Eric> name exists it is fine to pass NULL. > > I've looked this patch over, and maybe I'm missing something, but how > does knowing the name of the file really tell you anything, esp when > you only get the filename, not the path? What threat are you > addressing with this change? Like you, I keep thinking back to this patch and going back and forth. But to answer your question: in some cases, the name of the file (plus the context of the directory in which it is created) can tell you what assumptions userspace will make about it. And userspace most definately is a part of the TCB, i.e. /bin/passwd and /bin/login. -serge From sandeen@sandeen.net Thu Dec 9 11:46:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9HkT6B047431 for ; Thu, 9 Dec 2010 11:46:30 -0600 X-ASG-Debug-ID: 1291916897-37af011c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A1BFB1436751 for ; Thu, 9 Dec 2010 09:48:17 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id 4aMMzKCZLFqLJCFS for ; Thu, 09 Dec 2010 09:48:17 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id 067C848E8B05; Thu, 9 Dec 2010 11:48:17 -0600 (CST) Message-ID: <4D011660.200@sandeen.net> Date: Thu, 09 Dec 2010 11:48:16 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.12) Gecko/20101027 Thunderbird/3.1.6 MIME-Version: 1.0 To: naveen yadav CC: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: XFS Testsuite Subject: Re: XFS Testsuite References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1291916898 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0209 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.48943 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/9/10 9:32 AM, naveen yadav wrote: > Hi all, > > I want to setup XFS testsuite for my embedded ARM Target, Is it possible ? > If any body have already done, Please help me. I am trying but there > are lots of constrain and problem It certainly is possible, and a very good idea - what problems have you encountered? I assume you've started with the README instructions? -Eric > Thanks > > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs > From john@stoffel.org Thu Dec 9 11:46:56 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9HkuGE047533 for ; Thu, 9 Dec 2010 11:46:56 -0600 X-ASG-Debug-ID: 1291916925-2a6c006b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mycroft.westnet.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0440C1D9DF8; Thu, 9 Dec 2010 09:48:45 -0800 (PST) Received: from mycroft.westnet.com (Mycroft.westnet.com [216.187.52.7]) by cuda.sgi.com with ESMTP id nZsGgoIhxfISrETN; Thu, 09 Dec 2010 09:48:45 -0800 (PST) Received: from jfsnew.stoffel.org (97-95-180-151.dhcp.oxfr.ma.charter.com [97.95.180.151]) (authenticated bits=0) by mycroft.westnet.com (8.14.4/8.14.4) with ESMTP id oB9HlruS002884 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 9 Dec 2010 12:47:53 -0500 (EST) Received: by jfsnew.stoffel.org (Postfix, from userid 1000) id D3637A073F; Thu, 9 Dec 2010 12:48:26 -0500 (EST) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <19713.5738.653711.301814@quad.stoffel.home> Date: Thu, 9 Dec 2010 12:48:26 -0500 From: "John Stoffel" To: Eric Paris Cc: John Stoffel , xfs-masters@oss.sgi.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, cluster-devel@redhat.com, linux-mtd@lists.infradead.org, jfs-discussion@lists.sourceforge.net, ocfs2-devel@oss.oracle.com, reiserfs-devel@vger.kernel.org, xfs@oss.sgi.com, linux-mm@kvack.org, linux-security-module@vger.kernel.org, chris.mason@oracle.com, jack@suse.cz, akpm@linux-foundation.org, adilger.kernel@dilger.ca, tytso@mit.edu, swhiteho@redhat.com, dwmw2@infradead.org, shaggy@linux.vnet.ibm.com, mfasheh@suse.com, joel.becker@oracle.com, aelder@sgi.com, hughd@google.com, jmorris@namei.org, sds@tycho.nsa.gov, eparis@parisplace.org, hch@lst.de, dchinner@redhat.com, viro@zeniv.linux.org.uk, tao.ma@oracle.com, shemminger@vyatta.com, jeffm@suse.com, paul.moore@hp.com, penguin-kernel@I-love.SAKURA.ne.jp, casey@schaufler-ca.com, kees.cook@canonical.com, dhowells@redhat.com X-ASG-Orig-Subj: Re: [PATCH] fs/vfs/security: pass last path component to LSM on inode creation Subject: Re: [PATCH] fs/vfs/security: pass last path component to LSM on inode creation In-Reply-To: <1291909941.3072.70.camel@localhost.localdomain> References: <20101208194527.13537.77202.stgit@paris.rdu.redhat.com> <19712.61515.201226.938553@quad.stoffel.home> <1291909941.3072.70.camel@localhost.localdomain> X-Mailer: VM 8.1.1 under 23.2.1 (x86_64-pc-linux-gnu) X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Scanned: clamav-milter 0.96.5 at mycroft X-Virus-Status: Clean X-Barracuda-Connect: Mycroft.westnet.com[216.187.52.7] X-Barracuda-Start-Time: 1291916926 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-ASG-Whitelist: BODY (http://marc\.info/\?) >>>>> "Eric" == Eric Paris writes: Eric> On Thu, 2010-12-09 at 10:05 -0500, John Stoffel wrote: >> >>>>> "Eric" == Eric Paris writes: >> So what happens when I create a file /home/john/shadow, does selinux >> (or LSM in general) then run extra checks because the filename is >> 'shadow' in your model? Eric> It's entirely a question of labeling and one that was discussed on the Eric> LSM list in some detail: Eric> http://marc.info/?t=129141308200002&r=1&w=2 Thank you for pointing me at this discussion. I'm working my way through it, but so far I'm not seeing any consensus that this is really the proper thing to do. I personally feel this should be in userspace if at all possible. Eric> The basic synopsis is that when a new inode is created SELinux Eric> must apply some label. It makes the decision for what label to Eric> apply based on 3 pieces of information. Eric> The label of the parent inode. Eric> The label of the process creating the new inode. Eric> The 'class' of the inode, S_ISREG, S_ISDIR, S_ISLNK, etc These seem to be ok, if you're using label based security. But since I freely admit I'm not an expert or even a user, I'm just trying to understand and push back to make sure we do what's good. And which doesn't impact non-SElinux users. Eric> This patch adds a 4th piece of information, the name of the Eric> object being created. An obvious situation where this will be Eric> useful is devtmpfs (although you'll find other examples in the Eric> above thread). devtmpfs when it creates char/block devices is Eric> unable to distinguish between kmem and console and so they are Eric> created with a generic label. hotplug/udev is then called which Eric> does some pathname like matching and relabels them to something Eric> more specific. We've found that many people are able to race Eric> against this particular updating and get spurious denials in Eric> /dev. With this patch devtmpfs will be able to get the labels Eric> correct to begin with. So your Label based access controls are *also* based on pathnames? Right? Eric> I'm certainly willing to discuss the security implications of this Eric> patch, but that would probably be best done with a significantly Eric> shortened cc-list. You'll see in the above mentioned thread that a Eric> number of 'security' people (even those who are staunchly anti-SELinux) Eric> recognize there is value in this and that it is certainly much better Eric> than we have today. >> I *think* the overhead shouldn't be there if SELINUX is disabled, but >> have you confirmed this? How you run performance tests before/after >> this change when doing lots of creations of inodes to see what sort of >> performance changes might be there? Eric> I've actually recently done some perf testing on creating large Eric> numbers of inodes using bonnie++, since SELinux was a noticeable Eric> overhead in that operation. Doing that same test with SELinux Eric> disabled (or enabled) I do not see a noticeable difference when Eric> this patch is applied or not. It's just an extra argument to a Eric> function that goes unused. That answers alot of my concerns then. Not having it impact users in a non-SELinux context is vitally important to me. Thanks, John From eparis@redhat.com Thu Dec 9 12:05:54 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=unavailable version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9I5sgW050863 for ; Thu, 9 Dec 2010 12:05:54 -0600 X-ASG-Debug-ID: 1291918062-5b3e01440000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4FA901CAA578; Thu, 9 Dec 2010 10:07:42 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id fkhXafT85bMVo6Dy; Thu, 09 Dec 2010 10:07:42 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oB9I5Ttk031827 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Thu, 9 Dec 2010 13:05:29 -0500 Received: from [10.11.231.139] (dhcp231-139.rdu.redhat.com [10.11.231.139]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id oB9I5LfX014858; Thu, 9 Dec 2010 13:05:21 -0500 X-ASG-Orig-Subj: Re: [PATCH] fs/vfs/security: pass last path component to LSM on inode creation Subject: Re: [PATCH] fs/vfs/security: pass last path component to LSM on inode creation From: Eric Paris To: John Stoffel Cc: xfs-masters@oss.sgi.com, linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org, linux-ext4@vger.kernel.org, cluster-devel@redhat.com, linux-mtd@lists.infradead.org, jfs-discussion@lists.sourceforge.net, ocfs2-devel@oss.oracle.com, reiserfs-devel@vger.kernel.org, xfs@oss.sgi.com, linux-mm@kvack.org, linux-security-module@vger.kernel.org, chris.mason@oracle.com, jack@suse.cz, akpm@linux-foundation.org, adilger.kernel@dilger.ca, tytso@mit.edu, swhiteho@redhat.com, dwmw2@infradead.org, shaggy@linux.vnet.ibm.com, mfasheh@suse.com, joel.becker@oracle.com, aelder@sgi.com, hughd@google.com, jmorris@namei.org, sds@tycho.nsa.gov, eparis@parisplace.org, hch@lst.de, dchinner@redhat.com, viro@zeniv.linux.org.uk, shemminger@vyatta.com, jeffm@suse.com, paul.moore@hp.com, penguin-kernel@I-love.SAKURA.ne.jp, casey@schaufler-ca.com, kees.cook@canonical.com, dhowells@redhat.com In-Reply-To: <19713.5738.653711.301814@quad.stoffel.home> References: <20101208194527.13537.77202.stgit@paris.rdu.redhat.com> <19712.61515.201226.938553@quad.stoffel.home> <1291909941.3072.70.camel@localhost.localdomain> <19713.5738.653711.301814@quad.stoffel.home> Content-Type: text/plain; charset="UTF-8" Date: Thu, 09 Dec 2010 13:05:21 -0500 Message-ID: <1291917921.12683.4.camel@localhost.localdomain> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291918063 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, 2010-12-09 at 12:48 -0500, John Stoffel wrote: > >>>>> "Eric" == Eric Paris writes: > > Eric> On Thu, 2010-12-09 at 10:05 -0500, John Stoffel wrote: > >> >>>>> "Eric" == Eric Paris writes: > > Eric> This patch adds a 4th piece of information, the name of the > Eric> object being created. An obvious situation where this will be > Eric> useful is devtmpfs (although you'll find other examples in the > Eric> above thread). devtmpfs when it creates char/block devices is > Eric> unable to distinguish between kmem and console and so they are > Eric> created with a generic label. hotplug/udev is then called which > Eric> does some pathname like matching and relabels them to something > Eric> more specific. We've found that many people are able to race > Eric> against this particular updating and get spurious denials in > Eric> /dev. With this patch devtmpfs will be able to get the labels > Eric> correct to begin with. > > So your Label based access controls are *also* based on pathnames? > Right? Access decisions are still based solely on the label. This patch can influence how new objects get their label, which makes the access decisions indirectly path based. You'll find a reasonable summary and commentary on lwn in this weeks security section. From aelder@sgi.com Thu Dec 9 15:17:54 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9LHstr082640 for ; Thu, 9 Dec 2010 15:17:54 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay2.corp.sgi.com (Postfix) with ESMTP id 6031D30407A; Thu, 9 Dec 2010 13:19:41 -0800 (PST) Received: from [127.0.0.1] ([198.149.20.12]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 9 Dec 2010 15:19:41 -0600 Subject: Re: [PATCH] xfstests: fix 108 golden output From: Alex Elder Reply-To: aelder@sgi.com To: Christoph Hellwig Cc: xfs@oss.sgi.com, branto@redhat.com In-Reply-To: <20101110125855.GA18357@infradead.org> References: <20101110125855.GA18357@infradead.org> Content-Type: text/plain; charset="UTF-8" Date: Thu, 09 Dec 2010 15:19:39 -0600 Message-ID: <1291929579.13355.30.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 09 Dec 2010 21:19:41.0215 (UTC) FILETIME=[CAE022F0:01CB97E6] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, 2010-11-10 at 07:58 -0500, Christoph Hellwig wrote: > The new common scratch mount filter produces slightly different > whitespaces than the old home grown filter, so adjust the golden > output. > > Signed-off-by: Christoph Hellwig I found out why this is happening. I get no such error, and Dave Chinner said he wasn't seeing it either. xfs_quota is formatting its output such that the second and later columns always align at a certain offset from the beginning of the line. As a result, path names assigned as SCRATCH_DEV of different lengths will produce different (filtered) output, with more or fewer blanks between SCRATCH_DEV and the usage number. Boris Ranto has proposed a change that would add the "-b" flag to diff when checking output against golden output. That should fix it, but it's possible we *want* differences in white space to matter in some cases. Have to look into this. -Alex From Natashal19@terra.com Thu Dec 9 17:37:14 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=2.0 required=5.0 tests=BAYES_50,FREEMAIL_FROM, FREEMAIL_REPLYTO_END_DIGIT autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oB9NbDgP106574 for ; Thu, 9 Dec 2010 17:37:14 -0600 X-ASG-Debug-ID: 1291937940-484c02fc0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from if00-mail-fb03-mia.mta.terra.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 950351437D92 for ; Thu, 9 Dec 2010 15:39:00 -0800 (PST) Received: from if00-mail-fb03-mia.mta.terra.com (if00-mail-fb03-mia.mta.terra.com [208.84.243.137]) by cuda.sgi.com with ESMTP id TcOqWcfJlyMXLhsZ for ; Thu, 09 Dec 2010 15:39:00 -0800 (PST) Received: from midland.terra.com (midland.tpn.terra.com [10.235.200.8]) by mail-fb03-mia.tpn.terra.com (Postfix) with ESMTP id E92A420061948 for ; Thu, 9 Dec 2010 23:38:59 +0000 (UTC) X-Terra-Karma: 0% X-Terra-Hash: 430f18e1c27bb7f65046f499c10b12a6 Received-SPF: pass (midland.terra.com: domain of terra.com designates 208.84.242.62 as permitted sender) client-ip=208.84.242.62; envelope-from=Natashal19@terra.com; helo=192.168.0.61; Received: from 192.168.0.61 (unknown [112.201.180.129]) (authenticated user Natashal19@terra.com) by midland.terra.com (Postfix) with ESMTPA id D0286280000BD for ; Thu, 9 Dec 2010 23:38:58 +0000 (UTC) Date: Thu, 9 Dec 2010 23:39:02 +0000 To: name From: Reply-To: X-ASG-Orig-Subj: I highly recommend this service... 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Go here now: http://379aday.Co.CC To your success, Carolyn Griffith P.S.: Don't delay - this could be gone any second now... ...If you are serious about cashing 6 figures per month affiliates cheques you can't miss this out -- go there NOW: => http://379aday.Co.CC 64 Bridgeport Drive Waynesboro VA 22980 Reply *remove* if you wish to be removed in our system From aelder@oss.sgi.com Thu Dec 9 20:10:25 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-0.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from oss.sgi.com (localhost [127.0.0.1]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA2APsT134279 for ; Thu, 9 Dec 2010 20:10:25 -0600 Received: (from aelder@localhost) by oss.sgi.com (8.14.3/8.14.3/Submit) id oBA2APVN134251; Thu, 9 Dec 2010 20:10:25 -0600 Date: Thu, 9 Dec 2010 20:10:25 -0600 Message-Id: <201012100210.oBA2APVN134251@oss.sgi.com> From: xfs@oss.sgi.com To: xfs@oss.sgi.com Subject: [XFS updates] XFS development tree branch, master, updated. v2.6.37-rc4-6-g05340d4 X-Git-Refname: refs/heads/master X-Git-Reftype: branch X-Git-Oldrev: c76febef574fd86566bbdf1a73a547a439115c25 X-Git-Newrev: 05340d4ab2ec2b6b4962c1c41c6ea8fb550f947b This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "XFS development tree". The branch, master has been updated 05340d4 xfs: log timestamp changes to the source inode in rename from c76febef574fd86566bbdf1a73a547a439115c25 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit 05340d4ab2ec2b6b4962c1c41c6ea8fb550f947b Author: Christoph Hellwig Date: Tue Dec 7 10:16:41 2010 +0000 xfs: log timestamp changes to the source inode in rename Now that we don't mark VFS inodes dirty anymore for internal timestamp changes, but rely on the transaction subsystem to push them out, we need to explicitly log the source inode in rename after updating it's timestamps to make sure the changes actually get forced out by sync/fsync or an AIL push. We already account for the fourth inode in the log reservation, as a rename of directories needs to update the nlink field, so just adding the xfs_trans_log_inode call is enough. This fixes the xfsqa 065 regression introduced by: "xfs: don't use vfs writeback for pure metadata modifications" Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder ----------------------------------------------------------------------- Summary of changes: fs/xfs/xfs_rename.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) hooks/post-receive -- XFS development tree From aelder@oss.sgi.com Thu Dec 9 20:10:35 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-0.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from oss.sgi.com (localhost [127.0.0.1]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA2AZbe134402 for ; Thu, 9 Dec 2010 20:10:35 -0600 Received: (from aelder@localhost) by oss.sgi.com (8.14.3/8.14.3/Submit) id oBA2AZbT134375; Thu, 9 Dec 2010 20:10:35 -0600 Date: Thu, 9 Dec 2010 20:10:35 -0600 Message-Id: <201012100210.oBA2AZbT134375@oss.sgi.com> From: xfs@oss.sgi.com To: xfs@oss.sgi.com Subject: [XFS updates] XFS development tree branch, for-linus, updated. v2.6.37-rc4-6-g05340d4 X-Git-Refname: refs/heads/for-linus X-Git-Reftype: branch X-Git-Oldrev: c76febef574fd86566bbdf1a73a547a439115c25 X-Git-Newrev: 05340d4ab2ec2b6b4962c1c41c6ea8fb550f947b This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "XFS development tree". The branch, for-linus has been updated 05340d4 xfs: log timestamp changes to the source inode in rename from c76febef574fd86566bbdf1a73a547a439115c25 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit 05340d4ab2ec2b6b4962c1c41c6ea8fb550f947b Author: Christoph Hellwig Date: Tue Dec 7 10:16:41 2010 +0000 xfs: log timestamp changes to the source inode in rename Now that we don't mark VFS inodes dirty anymore for internal timestamp changes, but rely on the transaction subsystem to push them out, we need to explicitly log the source inode in rename after updating it's timestamps to make sure the changes actually get forced out by sync/fsync or an AIL push. We already account for the fourth inode in the log reservation, as a rename of directories needs to update the nlink field, so just adding the xfs_trans_log_inode call is enough. This fixes the xfsqa 065 regression introduced by: "xfs: don't use vfs writeback for pure metadata modifications" Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder ----------------------------------------------------------------------- Summary of changes: fs/xfs/xfs_rename.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) hooks/post-receive -- XFS development tree From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 02:41:14 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA8fE4q205194 for ; Fri, 10 Dec 2010 02:41:14 -0600 X-ASG-Debug-ID: 1291970583-626f03170000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 06144160F98E for ; Fri, 10 Dec 2010 00:43:03 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id beg1NP4dVCRIg084 for ; Fri, 10 Dec 2010 00:43:03 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PQyZD-0006RQ-Be for xfs@oss.sgi.com; Fri, 10 Dec 2010 08:43:03 +0000 Message-Id: <20101210084303.320837611@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Fri, 10 Dec 2010 03:42:24 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 09/10] xfs: refactor xfs_vm_writepage Subject: [PATCH 09/10] xfs: refactor xfs_vm_writepage References: <20101210084215.259628825@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-factor-writepage X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291970584 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean After the last patches the code for overwrites is the same as for delayed and unwritten extents except that it doesn't need to call xfs_map_at_offset. Take care of that fact to simplify xfs_vm_writepage. The buffer loop now first checks the type of buffer and checks/sets the ioend type, or continues to the next buffer if it's not interesting to us. Only after that we validate the iomap and perform the block mapping if needed, all in common code for the cases where we have to do work. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Index: xfs/fs/xfs/linux-2.6/xfs_aops.c =================================================================== --- xfs.orig/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:52:12.718004124 +0100 +++ xfs/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:52:23.144273297 +0100 @@ -999,74 +999,55 @@ xfs_vm_writepage( continue; } - if (imap_valid) - imap_valid = xfs_imap_valid(inode, &imap, offset); - - if (buffer_unwritten(bh) || buffer_delay(bh)) { - if (buffer_unwritten(bh)) { - if (type != IO_UNWRITTEN) { - type = IO_UNWRITTEN; - imap_valid = 0; - } - } else if (buffer_delay(bh)) { - if (type != IO_DELALLOC) { - type = IO_DELALLOC; - imap_valid = 0; - } - } - - if (!imap_valid) { - /* - * If we didn't have a valid mapping then we - * need to ensure that we put the new mapping - * in a new ioend structure. This needs to be - * done to ensure that the ioends correctly - * reflect the block mappings at io completion - * for unwritten extent conversion. - */ - new_ioend = 1; - err = xfs_map_blocks(inode, offset, &imap, - type, nonblocking); - if (err) - goto error; - imap_valid = xfs_imap_valid(inode, &imap, - offset); + if (buffer_unwritten(bh)) { + if (type != IO_UNWRITTEN) { + type = IO_UNWRITTEN; + imap_valid = 0; } - if (imap_valid) { - xfs_map_at_offset(inode, bh, &imap, offset); - xfs_add_to_ioend(inode, bh, offset, type, - &ioend, new_ioend); - count++; + } else if (buffer_delay(bh)) { + if (type != IO_DELALLOC) { + type = IO_DELALLOC; + imap_valid = 0; } } else if (buffer_uptodate(bh)) { - /* - * we got here because the buffer is already mapped. - * That means it must already have extents allocated - * underneath it. Map the extent by reading it. - */ if (type != IO_OVERWRITE) { type = IO_OVERWRITE; imap_valid = 0; } - if (!imap_valid) { - new_ioend = 1; - err = xfs_map_blocks(inode, offset, - &imap, type, nonblocking); - if (err) - goto error; - imap_valid = xfs_imap_valid(inode, &imap, - offset); + } else { + if (PageUptodate(page)) { + ASSERT(buffer_mapped(bh)); + imap_valid = 0; } + continue; + } - if (imap_valid) { + if (imap_valid) + imap_valid = xfs_imap_valid(inode, &imap, offset); + if (!imap_valid) { + /* + * If we didn't have a valid mapping then we need to + * put the new mapping into a separate ioend structure. + * This ensures non-contiguous extents always have + * separate ioends, which is particularly important + * for unwritten extent conversion at I/O completion + * time. + */ + new_ioend = 1; + err = xfs_map_blocks(inode, offset, &imap, type, + nonblocking); + if (err) + goto error; + imap_valid = xfs_imap_valid(inode, &imap, offset); + } + if (imap_valid) { + if (type == IO_OVERWRITE) lock_buffer(bh); - xfs_add_to_ioend(inode, bh, offset, type, - &ioend, new_ioend); - count++; - } - } else if (PageUptodate(page)) { - ASSERT(buffer_mapped(bh)); - imap_valid = 0; + else + xfs_map_at_offset(inode, bh, &imap, offset); + xfs_add_to_ioend(inode, bh, offset, type, &ioend, + new_ioend); + count++; } if (!iohead) From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 02:41:14 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_35, LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA8fDLU205184 for ; Fri, 10 Dec 2010 02:41:14 -0600 X-ASG-Debug-ID: 1291970583-626b03820000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8AF65160F98F for ; Fri, 10 Dec 2010 00:43:03 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id Zb2agampurAibyfE for ; Fri, 10 Dec 2010 00:43:03 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PQyZC-0006QO-Tc for xfs@oss.sgi.com; Fri, 10 Dec 2010 08:43:02 +0000 Message-Id: <20101210084302.878788913@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Fri, 10 Dec 2010 03:42:22 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 07/10] xfs: remove xfs_probe_cluster Subject: [PATCH 07/10] xfs: remove xfs_probe_cluster References: <20101210084215.259628825@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-kill-xfs_probe_cluster X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291970583 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean xfs_map_blocks always calls xfs_bmapi with the XFS_BMAPI_ENTIRE entire flag, which tells it to not cap the extent at the passed in size, but just treat the size as an minimum to map. This means xfs_probe_cluster is entirely useless as we'll always get the whole extent back anyway. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Index: xfs/fs/xfs/linux-2.6/xfs_aops.c =================================================================== --- xfs.orig/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:51:10.367274204 +0100 +++ xfs/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:51:41.609272318 +0100 @@ -304,13 +304,13 @@ STATIC int xfs_map_blocks( struct inode *inode, loff_t offset, - ssize_t count, struct xfs_bmbt_irec *imap, int type, int nonblocking) { struct xfs_inode *ip = XFS_I(inode); struct xfs_mount *mp = ip->i_mount; + ssize_t count = 1 << inode->i_blkbits; xfs_fileoff_t offset_fsb, end_fsb; int error = 0; int bmapi_flags = XFS_BMAPI_ENTIRE; @@ -635,108 +635,6 @@ xfs_map_at_offset( } /* - * Look for a page at index that is suitable for clustering. - */ -STATIC unsigned int -xfs_probe_page( - struct page *page, - unsigned int pg_offset) -{ - struct buffer_head *bh, *head; - int ret = 0; - - if (PageWriteback(page)) - return 0; - if (!PageDirty(page)) - return 0; - if (!page->mapping) - return 0; - if (!page_has_buffers(page)) - return 0; - - bh = head = page_buffers(page); - do { - if (!buffer_uptodate(bh)) - break; - if (!buffer_mapped(bh)) - break; - ret += bh->b_size; - if (ret >= pg_offset) - break; - } while ((bh = bh->b_this_page) != head); - - return ret; -} - -STATIC size_t -xfs_probe_cluster( - struct inode *inode, - struct page *startpage, - struct buffer_head *bh, - struct buffer_head *head) -{ - struct pagevec pvec; - pgoff_t tindex, tlast, tloff; - size_t total = 0; - int done = 0, i; - - /* First sum forwards in this page */ - do { - if (!buffer_uptodate(bh) || !buffer_mapped(bh)) - return total; - total += bh->b_size; - } while ((bh = bh->b_this_page) != head); - - /* if we reached the end of the page, sum forwards in following pages */ - tlast = i_size_read(inode) >> PAGE_CACHE_SHIFT; - tindex = startpage->index + 1; - - /* Prune this back to avoid pathological behavior */ - tloff = min(tlast, startpage->index + 64); - - pagevec_init(&pvec, 0); - while (!done && tindex <= tloff) { - unsigned len = min_t(pgoff_t, PAGEVEC_SIZE, tlast - tindex + 1); - - if (!pagevec_lookup(&pvec, inode->i_mapping, tindex, len)) - break; - - for (i = 0; i < pagevec_count(&pvec); i++) { - struct page *page = pvec.pages[i]; - size_t pg_offset, pg_len = 0; - - if (tindex == tlast) { - pg_offset = - i_size_read(inode) & (PAGE_CACHE_SIZE - 1); - if (!pg_offset) { - done = 1; - break; - } - } else - pg_offset = PAGE_CACHE_SIZE; - - if (page->index == tindex && trylock_page(page)) { - pg_len = xfs_probe_page(page, pg_offset); - unlock_page(page); - } - - if (!pg_len) { - done = 1; - break; - } - - total += pg_len; - tindex++; - } - - pagevec_release(&pvec); - cond_resched(); - } - - return total; -} - -/* * Test if a given page is suitable for writing as part of an unwritten * or delayed allocate extent. */ @@ -1028,7 +926,7 @@ xfs_vm_writepage( unsigned int type; __uint64_t end_offset; pgoff_t end_index, last_index; - ssize_t size, len; + ssize_t len; int err, imap_valid = 0, uptodate = 1; int count = 0; int all_bh = 0; @@ -1133,7 +1031,7 @@ xfs_vm_writepage( * for unwritten extent conversion. */ new_ioend = 1; - err = xfs_map_blocks(inode, offset, len, &imap, + err = xfs_map_blocks(inode, offset, &imap, type, nonblocking); if (err) goto error; @@ -1158,8 +1056,7 @@ xfs_vm_writepage( } if (!imap_valid) { new_ioend = 1; - size = xfs_probe_cluster(inode, page, bh, head); - err = xfs_map_blocks(inode, offset, size, + err = xfs_map_blocks(inode, offset, &imap, type, nonblocking); if (err) goto error; From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 02:41:14 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_66 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA8fDga205177 for ; Fri, 10 Dec 2010 02:41:14 -0600 X-ASG-Debug-ID: 1291970582-523d027b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 508E11DC53D for ; Fri, 10 Dec 2010 00:43:03 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id hba4f68hXimpJO5P for ; Fri, 10 Dec 2010 00:43:03 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PQyZC-0006Ps-MB for xfs@oss.sgi.com; Fri, 10 Dec 2010 08:43:02 +0000 Message-Id: <20101210084302.641592786@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Fri, 10 Dec 2010 03:42:21 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 06/10] xfs: simplify xfs_map_blocks Subject: [PATCH 06/10] xfs: simplify xfs_map_blocks References: <20101210084215.259628825@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-simplify-map_blocks X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291970583 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean No need to lock the extent map exclusive when performing an overwrite, we know the extent map must already have been loaded by get_blocks. Apply the non-blocking inode semantics to all mapping types instead of just delayed allocations. Remove the handling of not yet allocated blocks for the IO_UNWRITTEN case - if an extent is marked as unwritten allocated in the buffer it must already have an extent on disk. Add asserts to verify all the assumptions above in debug builds. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Index: xfs/fs/xfs/linux-2.6/xfs_aops.c =================================================================== --- xfs.orig/fs/xfs/linux-2.6/xfs_aops.c 2010-10-31 15:10:59.000000000 -0400 +++ xfs/fs/xfs/linux-2.6/xfs_aops.c 2010-10-31 15:13:27.777719469 -0400 @@ -313,81 +313,54 @@ xfs_map_blocks( struct xfs_mount *mp = ip->i_mount; xfs_fileoff_t offset_fsb, end_fsb; int error = 0; - int lockmode = 0; int bmapi_flags = XFS_BMAPI_ENTIRE; int nimaps = 1; if (XFS_FORCED_SHUTDOWN(mp)) return -XFS_ERROR(EIO); - switch (type) { - case IO_OVERWRITE: - lockmode = xfs_ilock_map_shared(ip); - break; - case IO_UNWRITTEN: - lockmode = XFS_ILOCK_EXCL; + if (type == IO_UNWRITTEN) bmapi_flags |= XFS_BMAPI_IGSTATE; - xfs_ilock(ip, lockmode); - break; - case IO_DELALLOC: - lockmode = XFS_ILOCK_SHARED; - - if (!xfs_ilock_nowait(ip, lockmode)) { - if (nonblocking) - return -XFS_ERROR(EAGAIN); - xfs_ilock(ip, lockmode); - } - break; + + if (!xfs_ilock_nowait(ip, XFS_ILOCK_SHARED)) { + if (nonblocking) + return -XFS_ERROR(EAGAIN); + xfs_ilock(ip, XFS_ILOCK_SHARED); } + ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE || + (ip->i_df.if_flags & XFS_IFEXTENTS)); ASSERT(offset <= mp->m_maxioffset); + if (offset + count > mp->m_maxioffset) count = mp->m_maxioffset - offset; end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); offset_fsb = XFS_B_TO_FSBT(mp, offset); - error = xfs_bmapi(NULL, ip, offset_fsb, end_fsb - offset_fsb, bmapi_flags, NULL, 0, imap, &nimaps, NULL); - if (error) - goto out; - - switch (type) { - case IO_UNWRITTEN: - /* If we found an extent, return it */ - if (nimaps && - (imap->br_startblock != HOLESTARTBLOCK) && - (imap->br_startblock != DELAYSTARTBLOCK)) { - trace_xfs_map_blocks_found(ip, offset, count, type, imap); - break; - } + xfs_iunlock(ip, XFS_ILOCK_SHARED); - error = xfs_iomap_write_delay(ip, offset, count, imap); - if (!error) - trace_xfs_map_blocks_alloc(ip, offset, count, type, imap); - break; - case IO_DELALLOC: - /* If we found an extent, return it */ - xfs_iunlock(ip, lockmode); - lockmode = 0; - - if (nimaps && !isnullstartblock(imap->br_startblock)) { - trace_xfs_map_blocks_found(ip, offset, count, type, imap); - break; - } + if (error) + return -XFS_ERROR(error); + if (type == IO_DELALLOC && + (!nimaps || isnullstartblock(imap->br_startblock))) { error = xfs_iomap_write_allocate(ip, offset, count, imap); if (!error) trace_xfs_map_blocks_alloc(ip, offset, count, type, imap); - break; - default: - if (nimaps) - trace_xfs_map_blocks_found(ip, offset, count, type, imap); + return -XFS_ERROR(error); } -out: - if (lockmode) - xfs_iunlock(ip, lockmode); - return -XFS_ERROR(error); +#ifdef DEBUG + if (type == IO_UNWRITTEN) { + ASSERT(nimaps); + ASSERT(imap->br_startblock != HOLESTARTBLOCK); + ASSERT(imap->br_startblock != DELAYSTARTBLOCK); + } +#endif + if (nimaps) + trace_xfs_map_blocks_found(ip, offset, count, type, imap); + return 0; } STATIC int From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 02:41:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA8fChh205170 for ; Fri, 10 Dec 2010 02:41:14 -0600 X-ASG-Debug-ID: 1291970582-776801a00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9AD161CAE1E8 for ; Fri, 10 Dec 2010 00:43:02 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id DDrZtgYEqMD834yV for ; Fri, 10 Dec 2010 00:43:02 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PQyZC-0006OG-2S for xfs@oss.sgi.com; Fri, 10 Dec 2010 08:43:02 +0000 Message-Id: <20101210084302.036988910@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Fri, 10 Dec 2010 03:42:18 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 03/10] xfs: a few small tweaks for overwrites in xfs_vm_writepage Subject: [PATCH 03/10] xfs: a few small tweaks for overwrites in xfs_vm_writepage References: <20101210084215.259628825@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-stop-trylocking-buffers X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291970582 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Don't trylock the buffer. We are the only one ever locking it for a regular file address space, and trylock was only copied from the generic code which did it due to the old buffer based writeout in jbd. Also make sure to only write out the buffer if the iomap actually is valid, because we wouldn't have a proper mapping otherwise. In practice we will never get an invalid mapping here as the page lock guarantees truncate doesn't race with us, but better be safe than sorry. Also make sure we allocate a new ioend when crossing boundaries between mappings, just like we do for delalloc and unwritten extents. Again this currently doesn't matter as the I/O end handler only cares for the boundaries for unwritten extents, but this makes the code fully correct and the same as for delalloc/unwritten extents. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Index: xfs/fs/xfs/linux-2.6/xfs_aops.c =================================================================== --- xfs.orig/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:47:31.707272459 +0100 +++ xfs/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:47:44.805272667 +0100 @@ -1051,6 +1051,8 @@ xfs_vm_writepage( type = IO_NEW; do { + int new_ioend = 0; + if (offset >= end_offset) break; if (!buffer_uptodate(bh)) @@ -1071,8 +1073,6 @@ xfs_vm_writepage( imap_valid = xfs_imap_valid(inode, &imap, offset); if (buffer_unwritten(bh) || buffer_delay(bh)) { - int new_ioend = 0; - if (buffer_unwritten(bh)) { if (type != IO_UNWRITTEN) { type = IO_UNWRITTEN; @@ -1124,6 +1124,7 @@ xfs_vm_writepage( imap_valid = 0; } if (!imap_valid) { + new_ioend = 1; size = xfs_probe_cluster(inode, page, bh, head); err = xfs_map_blocks(inode, offset, size, &imap, flags); @@ -1142,14 +1143,12 @@ xfs_vm_writepage( * that we are writing into for the first time. */ type = IO_NEW; - if (trylock_buffer(bh)) { - if (imap_valid) - all_bh = 1; + if (imap_valid) { + all_bh = 1; + lock_buffer(bh); xfs_add_to_ioend(inode, bh, offset, type, - &ioend, !imap_valid); + &ioend, new_ioend); count++; - } else { - imap_valid = 0; } } else if (PageUptodate(page)) { ASSERT(buffer_mapped(bh)); From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 02:41:14 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_66 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA8fDY0205176 for ; Fri, 10 Dec 2010 02:41:14 -0600 X-ASG-Debug-ID: 1291970582-4666035a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4D8F71DC53B for ; Fri, 10 Dec 2010 00:43:02 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id IW2obc0CbT3nKfQN for ; Fri, 10 Dec 2010 00:43:02 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PQyZC-0006PI-Fw for xfs@oss.sgi.com; Fri, 10 Dec 2010 08:43:02 +0000 Message-Id: <20101210084302.454258243@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Fri, 10 Dec 2010 03:42:20 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 05/10] xfs: kill xfs_iomap Subject: [PATCH 05/10] xfs: kill xfs_iomap References: <20101210084215.259628825@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-kill-xfs_iomap X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291970583 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Opencode the xfs_iomap code in it's two callers. The overlap of passed flags already was minimal and will be further reduced in the next patch. As a side effect the BMAPI_* flags for xfs_bmapi and the IO_* flags for I/O end processing are merged into a single set of flags, which should be a bit more descriptive of the operation we perform. Also improve the tracing by giving each caller it's own type set of tracepoints. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Index: xfs/fs/xfs/xfs_iomap.h =================================================================== --- xfs.orig/fs/xfs/xfs_iomap.h 2010-12-02 12:38:03.719005800 +0100 +++ xfs/fs/xfs/xfs_iomap.h 2010-12-09 15:48:23.779003915 +0100 @@ -18,30 +18,15 @@ #ifndef __XFS_IOMAP_H__ #define __XFS_IOMAP_H__ -/* base extent manipulation calls */ -#define BMAPI_READ (1 << 0) /* read extents */ -#define BMAPI_WRITE (1 << 1) /* create extents */ -#define BMAPI_ALLOCATE (1 << 2) /* delayed allocate to real extents */ - -/* modifiers */ -#define BMAPI_IGNSTATE (1 << 4) /* ignore unwritten state on read */ -#define BMAPI_DIRECT (1 << 5) /* direct instead of buffered write */ -#define BMAPI_MMA (1 << 6) /* allocate for mmap write */ -#define BMAPI_TRYLOCK (1 << 7) /* non-blocking request */ - -#define BMAPI_FLAGS \ - { BMAPI_READ, "READ" }, \ - { BMAPI_WRITE, "WRITE" }, \ - { BMAPI_ALLOCATE, "ALLOCATE" }, \ - { BMAPI_IGNSTATE, "IGNSTATE" }, \ - { BMAPI_DIRECT, "DIRECT" }, \ - { BMAPI_TRYLOCK, "TRYLOCK" } - struct xfs_inode; struct xfs_bmbt_irec; -extern int xfs_iomap(struct xfs_inode *, xfs_off_t, ssize_t, int, - struct xfs_bmbt_irec *, int *, int *); +extern int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t, + struct xfs_bmbt_irec *, int); +extern int xfs_iomap_write_delay(struct xfs_inode *, xfs_off_t, size_t, + struct xfs_bmbt_irec *); +extern int xfs_iomap_write_allocate(struct xfs_inode *, xfs_off_t, size_t, + struct xfs_bmbt_irec *); extern int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, size_t); #endif /* __XFS_IOMAP_H__*/ Index: xfs/fs/xfs/linux-2.6/xfs_aops.c =================================================================== --- xfs.orig/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:47:44.805272667 +0100 +++ xfs/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:49:29.815255698 +0100 @@ -38,15 +38,6 @@ #include #include -/* - * Types of I/O for bmap clustering and I/O completion tracking. - */ -enum { - IO_READ, /* mapping for a read */ - IO_DELAY, /* mapping covers delalloc region */ - IO_UNWRITTEN, /* mapping covers allocated but uninitialized data */ - IO_NEW /* just allocated */ -}; /* * Prime number of hash buckets since address is used as the key. @@ -182,9 +173,6 @@ xfs_setfilesize( xfs_inode_t *ip = XFS_I(ioend->io_inode); xfs_fsize_t isize; - ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG); - ASSERT(ioend->io_type != IO_READ); - if (unlikely(ioend->io_error)) return 0; @@ -244,10 +232,8 @@ xfs_end_io( * We might have to update the on-disk file size after extending * writes. */ - if (ioend->io_type != IO_READ) { - error = xfs_setfilesize(ioend); - ASSERT(!error || error == EAGAIN); - } + error = xfs_setfilesize(ioend); + ASSERT(!error || error == EAGAIN); /* * If we didn't complete processing of the ioend, requeue it to the @@ -320,12 +306,88 @@ xfs_map_blocks( loff_t offset, ssize_t count, struct xfs_bmbt_irec *imap, - int flags) + int type, + int nonblocking) { - int nmaps = 1; - int new = 0; + struct xfs_inode *ip = XFS_I(inode); + struct xfs_mount *mp = ip->i_mount; + xfs_fileoff_t offset_fsb, end_fsb; + int error = 0; + int lockmode = 0; + int bmapi_flags = XFS_BMAPI_ENTIRE; + int nimaps = 1; + + if (XFS_FORCED_SHUTDOWN(mp)) + return -XFS_ERROR(EIO); + + switch (type) { + case IO_OVERWRITE: + lockmode = xfs_ilock_map_shared(ip); + break; + case IO_UNWRITTEN: + lockmode = XFS_ILOCK_EXCL; + bmapi_flags |= XFS_BMAPI_IGSTATE; + xfs_ilock(ip, lockmode); + break; + case IO_DELALLOC: + lockmode = XFS_ILOCK_SHARED; + + if (!xfs_ilock_nowait(ip, lockmode)) { + if (nonblocking) + return -XFS_ERROR(EAGAIN); + xfs_ilock(ip, lockmode); + } + break; + } + + ASSERT(offset <= mp->m_maxioffset); + if (offset + count > mp->m_maxioffset) + count = mp->m_maxioffset - offset; + end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); + offset_fsb = XFS_B_TO_FSBT(mp, offset); + + error = xfs_bmapi(NULL, ip, offset_fsb, end_fsb - offset_fsb, + bmapi_flags, NULL, 0, imap, &nimaps, NULL); + if (error) + goto out; + + switch (type) { + case IO_UNWRITTEN: + /* If we found an extent, return it */ + if (nimaps && + (imap->br_startblock != HOLESTARTBLOCK) && + (imap->br_startblock != DELAYSTARTBLOCK)) { + trace_xfs_map_blocks_found(ip, offset, count, type, imap); + break; + } + + error = xfs_iomap_write_delay(ip, offset, count, imap); + if (!error) + trace_xfs_map_blocks_alloc(ip, offset, count, type, imap); + break; + case IO_DELALLOC: + /* If we found an extent, return it */ + xfs_iunlock(ip, lockmode); + lockmode = 0; + + if (nimaps && !isnullstartblock(imap->br_startblock)) { + trace_xfs_map_blocks_found(ip, offset, count, type, imap); + break; + } + + error = xfs_iomap_write_allocate(ip, offset, count, imap); + if (!error) + trace_xfs_map_blocks_alloc(ip, offset, count, type, imap); + break; + default: + if (nimaps) + trace_xfs_map_blocks_found(ip, offset, count, type, imap); + } - return -xfs_iomap(XFS_I(inode), offset, count, flags, imap, &nmaps, &new); +out: + if (lockmode) + xfs_iunlock(ip, lockmode); + return -XFS_ERROR(error); } STATIC int @@ -722,9 +784,9 @@ xfs_is_delayed_page( if (buffer_unwritten(bh)) acceptable = (type == IO_UNWRITTEN); else if (buffer_delay(bh)) - acceptable = (type == IO_DELAY); + acceptable = (type == IO_DELALLOC); else if (buffer_dirty(bh) && buffer_mapped(bh)) - acceptable = (type == IO_NEW); + acceptable = (type == IO_OVERWRITE); else break; } while ((bh = bh->b_this_page) != head); @@ -809,7 +871,7 @@ xfs_convert_page( if (buffer_unwritten(bh)) type = IO_UNWRITTEN; else - type = IO_DELAY; + type = IO_DELALLOC; if (!xfs_imap_valid(inode, imap, offset)) { done = 1; @@ -826,7 +888,7 @@ xfs_convert_page( page_dirty--; count++; } else { - type = IO_NEW; + type = IO_OVERWRITE; if (buffer_mapped(bh) && all_bh) { lock_buffer(bh); xfs_add_to_ioend(inode, bh, offset, @@ -926,7 +988,7 @@ xfs_aops_discard_page( struct buffer_head *bh, *head; loff_t offset = page_offset(page); - if (!xfs_is_delayed_page(page, IO_DELAY)) + if (!xfs_is_delayed_page(page, IO_DELALLOC)) goto out_invalidate; if (XFS_FORCED_SHUTDOWN(ip->i_mount)) @@ -994,9 +1056,10 @@ xfs_vm_writepage( __uint64_t end_offset; pgoff_t end_index, last_index; ssize_t size, len; - int flags, err, imap_valid = 0, uptodate = 1; + int err, imap_valid = 0, uptodate = 1; int count = 0; int all_bh = 0; + int nonblocking = 0; trace_xfs_writepage(inode, page, 0); @@ -1047,8 +1110,10 @@ xfs_vm_writepage( bh = head = page_buffers(page); offset = page_offset(page); - flags = BMAPI_READ; - type = IO_NEW; + type = IO_OVERWRITE; + + if (wbc->sync_mode == WB_SYNC_NONE && wbc->nonblocking) + nonblocking = 1; do { int new_ioend = 0; @@ -1078,16 +1143,11 @@ xfs_vm_writepage( type = IO_UNWRITTEN; imap_valid = 0; } - flags = BMAPI_WRITE | BMAPI_IGNSTATE; } else if (buffer_delay(bh)) { - if (type != IO_DELAY) { - type = IO_DELAY; + if (type != IO_DELALLOC) { + type = IO_DELALLOC; imap_valid = 0; } - flags = BMAPI_ALLOCATE; - - if (wbc->sync_mode == WB_SYNC_NONE) - flags |= BMAPI_TRYLOCK; } if (!imap_valid) { @@ -1100,8 +1160,8 @@ xfs_vm_writepage( * for unwritten extent conversion. */ new_ioend = 1; - err = xfs_map_blocks(inode, offset, len, - &imap, flags); + err = xfs_map_blocks(inode, offset, len, &imap, + type, nonblocking); if (err) goto error; imap_valid = xfs_imap_valid(inode, &imap, @@ -1119,30 +1179,21 @@ xfs_vm_writepage( * That means it must already have extents allocated * underneath it. Map the extent by reading it. */ - if (flags != BMAPI_READ) { - flags = BMAPI_READ; + if (type != IO_OVERWRITE) { + type = IO_OVERWRITE; imap_valid = 0; } if (!imap_valid) { new_ioend = 1; size = xfs_probe_cluster(inode, page, bh, head); err = xfs_map_blocks(inode, offset, size, - &imap, flags); + &imap, type, nonblocking); if (err) goto error; imap_valid = xfs_imap_valid(inode, &imap, offset); } - /* - * We set the type to IO_NEW in case we are doing a - * small write at EOF that is extending the file but - * without needing an allocation. We need to update the - * file size on I/O completion in this case so it is - * the same case as having just allocated a new extent - * that we are writing into for the first time. - */ - type = IO_NEW; if (imap_valid) { all_bh = 1; lock_buffer(bh); @@ -1250,13 +1301,19 @@ __xfs_get_blocks( int create, int direct) { - int flags = create ? BMAPI_WRITE : BMAPI_READ; + struct xfs_inode *ip = XFS_I(inode); + struct xfs_mount *mp = ip->i_mount; + xfs_fileoff_t offset_fsb, end_fsb; + int error = 0; + int lockmode = 0; struct xfs_bmbt_irec imap; + int nimaps = 1; xfs_off_t offset; ssize_t size; - int nimap = 1; int new = 0; - int error; + + if (XFS_FORCED_SHUTDOWN(mp)) + return -XFS_ERROR(EIO); offset = (xfs_off_t)iblock << inode->i_blkbits; ASSERT(bh_result->b_size >= (1 << inode->i_blkbits)); @@ -1265,15 +1322,45 @@ __xfs_get_blocks( if (!create && direct && offset >= i_size_read(inode)) return 0; - if (direct && create) - flags |= BMAPI_DIRECT; + if (create) { + lockmode = XFS_ILOCK_EXCL; + xfs_ilock(ip, lockmode); + } else { + lockmode = xfs_ilock_map_shared(ip); + } + + ASSERT(offset <= mp->m_maxioffset); + if (offset + size > mp->m_maxioffset) + size = mp->m_maxioffset - offset; + end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + size); + offset_fsb = XFS_B_TO_FSBT(mp, offset); - error = xfs_iomap(XFS_I(inode), offset, size, flags, &imap, &nimap, - &new); + error = xfs_bmapi(NULL, ip, offset_fsb, end_fsb - offset_fsb, + XFS_BMAPI_ENTIRE, NULL, 0, &imap, &nimaps, NULL); if (error) - return -error; - if (nimap == 0) - return 0; + goto out_unlock; + + if (create && + (!nimaps || + (imap.br_startblock == HOLESTARTBLOCK || + imap.br_startblock == DELAYSTARTBLOCK))) { + if (direct) { + error = xfs_iomap_write_direct(ip, offset, size, + &imap, nimaps); + } else { + error = xfs_iomap_write_delay(ip, offset, size, &imap); + } + if (error) + goto out_unlock; + + trace_xfs_get_blocks_alloc(ip, offset, size, 0, &imap); + } else if (nimaps) { + trace_xfs_get_blocks_found(ip, offset, size, 0, &imap); + } else { + trace_xfs_get_blocks_notfound(ip, offset, size); + goto out_unlock; + } + xfs_iunlock(ip, lockmode); if (imap.br_startblock != HOLESTARTBLOCK && imap.br_startblock != DELAYSTARTBLOCK) { @@ -1340,6 +1427,10 @@ __xfs_get_blocks( } return 0; + +out_unlock: + xfs_iunlock(ip, lockmode); + return -error; } int @@ -1427,7 +1518,7 @@ xfs_vm_direct_IO( ssize_t ret; if (rw & WRITE) { - iocb->private = xfs_alloc_ioend(inode, IO_NEW); + iocb->private = xfs_alloc_ioend(inode, IO_DIRECT); ret = __blockdev_direct_IO(rw, iocb, inode, bdev, iov, offset, nr_segs, Index: xfs/fs/xfs/linux-2.6/xfs_trace.h =================================================================== --- xfs.orig/fs/xfs/linux-2.6/xfs_trace.h 2010-12-09 15:45:46.367254159 +0100 +++ xfs/fs/xfs/linux-2.6/xfs_trace.h 2010-12-09 15:48:23.784010410 +0100 @@ -935,10 +935,10 @@ DEFINE_PAGE_EVENT(xfs_writepage); DEFINE_PAGE_EVENT(xfs_releasepage); DEFINE_PAGE_EVENT(xfs_invalidatepage); -DECLARE_EVENT_CLASS(xfs_iomap_class, +DECLARE_EVENT_CLASS(xfs_imap_class, TP_PROTO(struct xfs_inode *ip, xfs_off_t offset, ssize_t count, - int flags, struct xfs_bmbt_irec *irec), - TP_ARGS(ip, offset, count, flags, irec), + int type, struct xfs_bmbt_irec *irec), + TP_ARGS(ip, offset, count, type, irec), TP_STRUCT__entry( __field(dev_t, dev) __field(xfs_ino_t, ino) @@ -946,7 +946,7 @@ DECLARE_EVENT_CLASS(xfs_iomap_class, __field(loff_t, new_size) __field(loff_t, offset) __field(size_t, count) - __field(int, flags) + __field(int, type) __field(xfs_fileoff_t, startoff) __field(xfs_fsblock_t, startblock) __field(xfs_filblks_t, blockcount) @@ -958,13 +958,13 @@ DECLARE_EVENT_CLASS(xfs_iomap_class, __entry->new_size = ip->i_new_size; __entry->offset = offset; __entry->count = count; - __entry->flags = flags; + __entry->type = type; __entry->startoff = irec ? irec->br_startoff : 0; __entry->startblock = irec ? irec->br_startblock : 0; __entry->blockcount = irec ? irec->br_blockcount : 0; ), TP_printk("dev %d:%d ino 0x%llx size 0x%llx new_size 0x%llx " - "offset 0x%llx count %zd flags %s " + "offset 0x%llx count %zd type %s " "startoff 0x%llx startblock %lld blockcount 0x%llx", MAJOR(__entry->dev), MINOR(__entry->dev), __entry->ino, @@ -972,20 +972,21 @@ DECLARE_EVENT_CLASS(xfs_iomap_class, __entry->new_size, __entry->offset, __entry->count, - __print_flags(__entry->flags, "|", BMAPI_FLAGS), + __print_symbolic(__entry->type, XFS_IO_TYPES), __entry->startoff, (__int64_t)__entry->startblock, __entry->blockcount) ) #define DEFINE_IOMAP_EVENT(name) \ -DEFINE_EVENT(xfs_iomap_class, name, \ +DEFINE_EVENT(xfs_imap_class, name, \ TP_PROTO(struct xfs_inode *ip, xfs_off_t offset, ssize_t count, \ - int flags, struct xfs_bmbt_irec *irec), \ - TP_ARGS(ip, offset, count, flags, irec)) -DEFINE_IOMAP_EVENT(xfs_iomap_enter); -DEFINE_IOMAP_EVENT(xfs_iomap_found); -DEFINE_IOMAP_EVENT(xfs_iomap_alloc); + int type, struct xfs_bmbt_irec *irec), \ + TP_ARGS(ip, offset, count, type, irec)) +DEFINE_IOMAP_EVENT(xfs_map_blocks_found); +DEFINE_IOMAP_EVENT(xfs_map_blocks_alloc); +DEFINE_IOMAP_EVENT(xfs_get_blocks_found); +DEFINE_IOMAP_EVENT(xfs_get_blocks_alloc); DECLARE_EVENT_CLASS(xfs_simple_io_class, TP_PROTO(struct xfs_inode *ip, xfs_off_t offset, ssize_t count), @@ -1022,6 +1023,7 @@ DEFINE_EVENT(xfs_simple_io_class, name, TP_ARGS(ip, offset, count)) DEFINE_SIMPLE_IO_EVENT(xfs_delalloc_enospc); DEFINE_SIMPLE_IO_EVENT(xfs_unwritten_convert); +DEFINE_SIMPLE_IO_EVENT(xfs_get_blocks_notfound); TRACE_EVENT(xfs_itruncate_start, Index: xfs/fs/xfs/linux-2.6/xfs_aops.h =================================================================== --- xfs.orig/fs/xfs/linux-2.6/xfs_aops.h 2010-12-02 12:38:03.745004124 +0100 +++ xfs/fs/xfs/linux-2.6/xfs_aops.h 2010-12-09 15:49:31.585257930 +0100 @@ -23,6 +23,22 @@ extern struct workqueue_struct *xfsconve extern mempool_t *xfs_ioend_pool; /* + * Types of I/O for bmap clustering and I/O completion tracking. + */ +enum { + IO_DIRECT = 0, /* special case for direct I/O ioends */ + IO_DELALLOC, /* mapping covers delalloc region */ + IO_UNWRITTEN, /* mapping covers allocated but uninitialized data */ + IO_OVERWRITE, /* mapping covers already allocated extent */ +}; + +#define XFS_IO_TYPES \ + { 0, "" }, \ + { IO_DELALLOC, "delalloc" }, \ + { IO_UNWRITTEN, "unwritten" }, \ + { IO_OVERWRITE, "overwrite" } + +/* * xfs_ioend struct manages large extent writes for XFS. * It can manage several multi-page bio's at once. */ Index: xfs/fs/xfs/xfs_iomap.c =================================================================== --- xfs.orig/fs/xfs/xfs_iomap.c 2010-12-09 15:48:00.407254089 +0100 +++ xfs/fs/xfs/xfs_iomap.c 2010-12-09 15:48:23.789003845 +0100 @@ -47,124 +47,8 @@ #define XFS_WRITEIO_ALIGN(mp,off) (((off) >> mp->m_writeio_log) \ << mp->m_writeio_log) -#define XFS_STRAT_WRITE_IMAPS 2 #define XFS_WRITE_IMAPS XFS_BMAP_MAX_NMAP -STATIC int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t, - struct xfs_bmbt_irec *, int); -STATIC int xfs_iomap_write_delay(struct xfs_inode *, xfs_off_t, size_t, - struct xfs_bmbt_irec *); -STATIC int xfs_iomap_write_allocate(struct xfs_inode *, xfs_off_t, size_t, - struct xfs_bmbt_irec *); - -int -xfs_iomap( - struct xfs_inode *ip, - xfs_off_t offset, - ssize_t count, - int flags, - struct xfs_bmbt_irec *imap, - int *nimaps, - int *new) -{ - struct xfs_mount *mp = ip->i_mount; - xfs_fileoff_t offset_fsb, end_fsb; - int error = 0; - int lockmode = 0; - int bmapi_flags = 0; - - ASSERT((ip->i_d.di_mode & S_IFMT) == S_IFREG); - - *new = 0; - - if (XFS_FORCED_SHUTDOWN(mp)) - return XFS_ERROR(EIO); - - trace_xfs_iomap_enter(ip, offset, count, flags, NULL); - - switch (flags & (BMAPI_READ | BMAPI_WRITE | BMAPI_ALLOCATE)) { - case BMAPI_READ: - lockmode = xfs_ilock_map_shared(ip); - bmapi_flags = XFS_BMAPI_ENTIRE; - break; - case BMAPI_WRITE: - lockmode = XFS_ILOCK_EXCL; - if (flags & BMAPI_IGNSTATE) - bmapi_flags |= XFS_BMAPI_IGSTATE|XFS_BMAPI_ENTIRE; - xfs_ilock(ip, lockmode); - break; - case BMAPI_ALLOCATE: - lockmode = XFS_ILOCK_SHARED; - bmapi_flags = XFS_BMAPI_ENTIRE; - - /* Attempt non-blocking lock */ - if (flags & BMAPI_TRYLOCK) { - if (!xfs_ilock_nowait(ip, lockmode)) - return XFS_ERROR(EAGAIN); - } else { - xfs_ilock(ip, lockmode); - } - break; - default: - BUG(); - } - - ASSERT(offset <= mp->m_maxioffset); - if ((xfs_fsize_t)offset + count > mp->m_maxioffset) - count = mp->m_maxioffset - offset; - end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count); - offset_fsb = XFS_B_TO_FSBT(mp, offset); - - error = xfs_bmapi(NULL, ip, offset_fsb, - (xfs_filblks_t)(end_fsb - offset_fsb), - bmapi_flags, NULL, 0, imap, - nimaps, NULL); - - if (error) - goto out; - - switch (flags & (BMAPI_WRITE|BMAPI_ALLOCATE)) { - case BMAPI_WRITE: - /* If we found an extent, return it */ - if (*nimaps && - (imap->br_startblock != HOLESTARTBLOCK) && - (imap->br_startblock != DELAYSTARTBLOCK)) { - trace_xfs_iomap_found(ip, offset, count, flags, imap); - break; - } - - if (flags & BMAPI_DIRECT) { - error = xfs_iomap_write_direct(ip, offset, count, imap, - *nimaps); - } else { - error = xfs_iomap_write_delay(ip, offset, count, imap); - } - - if (!error) { - trace_xfs_iomap_alloc(ip, offset, count, flags, imap); - } - *new = 1; - break; - case BMAPI_ALLOCATE: - /* If we found an extent, return it */ - xfs_iunlock(ip, lockmode); - lockmode = 0; - - if (*nimaps && !isnullstartblock(imap->br_startblock)) { - trace_xfs_iomap_found(ip, offset, count, flags, imap); - break; - } - - error = xfs_iomap_write_allocate(ip, offset, count, imap); - break; - } - -out: - if (lockmode) - xfs_iunlock(ip, lockmode); - return XFS_ERROR(error); -} - STATIC int xfs_iomap_eof_align_last_fsb( xfs_mount_t *mp, @@ -233,7 +117,7 @@ xfs_cmn_err_fsblock_zero( return EFSCORRUPTED; } -STATIC int +int xfs_iomap_write_direct( xfs_inode_t *ip, xfs_off_t offset, @@ -428,7 +312,7 @@ xfs_iomap_eof_want_preallocate( return 0; } -STATIC int +int xfs_iomap_write_delay( xfs_inode_t *ip, xfs_off_t offset, @@ -527,7 +411,7 @@ retry: * We no longer bother to look at the incoming map - all we have to * guarantee is that whatever we allocate fills the required range. */ -STATIC int +int xfs_iomap_write_allocate( xfs_inode_t *ip, xfs_off_t offset, From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 02:41:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.9 required=5.0 tests=BAYES_00,LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA8fDil205183 for ; Fri, 10 Dec 2010 02:41:15 -0600 X-ASG-Debug-ID: 1291970582-626903890000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 717C9160F98E for ; Fri, 10 Dec 2010 00:43:02 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id J8n7knZmSKLWXGHM for ; Fri, 10 Dec 2010 00:43:02 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PQyZC-0006Om-8o for xfs@oss.sgi.com; Fri, 10 Dec 2010 08:43:02 +0000 Message-Id: <20101210084302.229951279@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Fri, 10 Dec 2010 03:42:19 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 04/10] xfs: cleanup the xfs_iomap_write_* helpers Subject: [PATCH 04/10] xfs: cleanup the xfs_iomap_write_* helpers References: <20101210084215.259628825@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-cleanup-iomap-helpers X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291970583 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Remove passing the BMAPI_* flags to these helpers, in xfs_iomap_write_direct the check BMAPI_DIRECT was always true, and in the xfs_iomap_write_delay path is was never checked at all. Remove the nmap return value as we never make use of it. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Index: xfs/fs/xfs/xfs_iomap.c =================================================================== --- xfs.orig/fs/xfs/xfs_iomap.c 2010-11-02 11:10:15.000103373 -0400 +++ xfs/fs/xfs/xfs_iomap.c 2010-11-02 11:14:14.640103375 -0400 @@ -51,11 +51,11 @@ #define XFS_WRITE_IMAPS XFS_BMAP_MAX_NMAP STATIC int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t, - int, struct xfs_bmbt_irec *, int *); -STATIC int xfs_iomap_write_delay(struct xfs_inode *, xfs_off_t, size_t, int, - struct xfs_bmbt_irec *, int *); + struct xfs_bmbt_irec *, int); +STATIC int xfs_iomap_write_delay(struct xfs_inode *, xfs_off_t, size_t, + struct xfs_bmbt_irec *); STATIC int xfs_iomap_write_allocate(struct xfs_inode *, xfs_off_t, size_t, - struct xfs_bmbt_irec *, int *); + struct xfs_bmbt_irec *); int xfs_iomap( @@ -134,12 +134,12 @@ xfs_iomap( } if (flags & BMAPI_DIRECT) { - error = xfs_iomap_write_direct(ip, offset, count, flags, - imap, nimaps); + error = xfs_iomap_write_direct(ip, offset, count, imap, + *nimaps); } else { - error = xfs_iomap_write_delay(ip, offset, count, flags, - imap, nimaps); + error = xfs_iomap_write_delay(ip, offset, count, imap); } + if (!error) { trace_xfs_iomap_alloc(ip, offset, count, flags, imap); } @@ -155,13 +155,10 @@ xfs_iomap( break; } - error = xfs_iomap_write_allocate(ip, offset, count, - imap, nimaps); + error = xfs_iomap_write_allocate(ip, offset, count, imap); break; } - ASSERT(*nimaps <= 1); - out: if (lockmode) xfs_iunlock(ip, lockmode); @@ -241,9 +238,8 @@ xfs_iomap_write_direct( xfs_inode_t *ip, xfs_off_t offset, size_t count, - int flags, xfs_bmbt_irec_t *imap, - int *nmaps) + int nmaps) { xfs_mount_t *mp = ip->i_mount; xfs_fileoff_t offset_fsb; @@ -279,7 +275,7 @@ xfs_iomap_write_direct( if (error) goto error_out; } else { - if (*nmaps && (imap->br_startblock == HOLESTARTBLOCK)) + if (nmaps && (imap->br_startblock == HOLESTARTBLOCK)) last_fsb = MIN(last_fsb, (xfs_fileoff_t) imap->br_blockcount + imap->br_startoff); @@ -331,7 +327,7 @@ xfs_iomap_write_direct( xfs_trans_ijoin(tp, ip); bmapi_flag = XFS_BMAPI_WRITE; - if ((flags & BMAPI_DIRECT) && (offset < ip->i_size || extsz)) + if (offset < ip->i_size || extsz) bmapi_flag |= XFS_BMAPI_PREALLOC; /* @@ -370,7 +366,6 @@ xfs_iomap_write_direct( goto error_out; } - *nmaps = 1; return 0; error0: /* Cancel bmap, unlock inode, unreserve quota blocks, cancel trans */ @@ -379,7 +374,6 @@ error0: /* Cancel bmap, unlock inode, un error1: /* Just cancel transaction */ xfs_trans_cancel(tp, XFS_TRANS_RELEASE_LOG_RES | XFS_TRANS_ABORT); - *nmaps = 0; /* nothing set-up here */ error_out: return XFS_ERROR(error); @@ -396,7 +390,6 @@ xfs_iomap_eof_want_preallocate( xfs_inode_t *ip, xfs_off_t offset, size_t count, - int ioflag, xfs_bmbt_irec_t *imap, int nimaps, int *prealloc) @@ -440,9 +433,7 @@ xfs_iomap_write_delay( xfs_inode_t *ip, xfs_off_t offset, size_t count, - int ioflag, - xfs_bmbt_irec_t *ret_imap, - int *nmaps) + xfs_bmbt_irec_t *ret_imap) { xfs_mount_t *mp = ip->i_mount; xfs_fileoff_t offset_fsb; @@ -470,7 +461,7 @@ xfs_iomap_write_delay( offset_fsb = XFS_B_TO_FSBT(mp, offset); error = xfs_iomap_eof_want_preallocate(mp, ip, offset, count, - ioflag, imap, XFS_WRITE_IMAPS, &prealloc); + imap, XFS_WRITE_IMAPS, &prealloc); if (error) return error; @@ -523,8 +514,6 @@ retry: return xfs_cmn_err_fsblock_zero(ip, &imap[0]); *ret_imap = imap[0]; - *nmaps = 1; - return 0; } @@ -543,8 +532,7 @@ xfs_iomap_write_allocate( xfs_inode_t *ip, xfs_off_t offset, size_t count, - xfs_bmbt_irec_t *imap, - int *retmap) + xfs_bmbt_irec_t *imap) { xfs_mount_t *mp = ip->i_mount; xfs_fileoff_t offset_fsb, last_block; @@ -557,8 +545,6 @@ xfs_iomap_write_allocate( int error = 0; int nres; - *retmap = 0; - /* * Make sure that the dquots are there. */ @@ -680,7 +666,6 @@ xfs_iomap_write_allocate( if ((offset_fsb >= imap->br_startoff) && (offset_fsb < (imap->br_startoff + imap->br_blockcount))) { - *retmap = 1; XFS_STATS_INC(xs_xstrat_quick); return 0; } From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 02:41:14 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA8fDqU205182 for ; Fri, 10 Dec 2010 02:41:14 -0600 X-ASG-Debug-ID: 1291970583-648901350000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 84DD21DC540 for ; Fri, 10 Dec 2010 00:43:03 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id GTCfWTwAMfGrqwmh for ; Fri, 10 Dec 2010 00:43:03 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PQyZD-0006Qu-41 for xfs@oss.sgi.com; Fri, 10 Dec 2010 08:43:03 +0000 Message-Id: <20101210084303.084674092@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Fri, 10 Dec 2010 03:42:23 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 08/10] xfs: remove the all_bh flag from xfs_convert_page Subject: [PATCH 08/10] xfs: remove the all_bh flag from xfs_convert_page References: <20101210084215.259628825@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-kill-all-bh X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291970583 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean The all_bh flag is always set when entering the page clustering machinery with a regular written extent, which means the check for it is superflous. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Index: xfs/fs/xfs/linux-2.6/xfs_aops.c =================================================================== --- xfs.orig/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:51:41.609272318 +0100 +++ xfs/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:52:12.718004124 +0100 @@ -682,8 +682,7 @@ xfs_convert_page( loff_t tindex, struct xfs_bmbt_irec *imap, xfs_ioend_t **ioendp, - struct writeback_control *wbc, - int all_bh) + struct writeback_control *wbc) { struct buffer_head *bh, *head; xfs_off_t end_offset; @@ -738,11 +737,14 @@ xfs_convert_page( continue; } - if (buffer_unwritten(bh) || buffer_delay(bh)) { + if (buffer_unwritten(bh) || buffer_delay(bh) || + buffer_mapped(bh)) { if (buffer_unwritten(bh)) type = IO_UNWRITTEN; - else + else if (buffer_delay(bh)) type = IO_DELALLOC; + else + type = IO_OVERWRITE; if (!xfs_imap_valid(inode, imap, offset)) { done = 1; @@ -752,23 +754,17 @@ xfs_convert_page( ASSERT(imap->br_startblock != HOLESTARTBLOCK); ASSERT(imap->br_startblock != DELAYSTARTBLOCK); - xfs_map_at_offset(inode, bh, imap, offset); + if (type == IO_OVERWRITE) + lock_buffer(bh); + else + xfs_map_at_offset(inode, bh, imap, offset); xfs_add_to_ioend(inode, bh, offset, type, ioendp, done); page_dirty--; count++; } else { - type = IO_OVERWRITE; - if (buffer_mapped(bh) && all_bh) { - lock_buffer(bh); - xfs_add_to_ioend(inode, bh, offset, - type, ioendp, done); - count++; - page_dirty--; - } else { - done = 1; - } + done = 1; } } while (offset += len, (bh = bh->b_this_page) != head); @@ -800,7 +796,6 @@ xfs_cluster_write( struct xfs_bmbt_irec *imap, xfs_ioend_t **ioendp, struct writeback_control *wbc, - int all_bh, pgoff_t tlast) { struct pagevec pvec; @@ -815,7 +810,7 @@ xfs_cluster_write( for (i = 0; i < pagevec_count(&pvec); i++) { done = xfs_convert_page(inode, pvec.pages[i], tindex++, - imap, ioendp, wbc, all_bh); + imap, ioendp, wbc); if (done) break; } @@ -929,7 +924,6 @@ xfs_vm_writepage( ssize_t len; int err, imap_valid = 0, uptodate = 1; int count = 0; - int all_bh = 0; int nonblocking = 0; trace_xfs_writepage(inode, page, 0); @@ -1065,7 +1059,6 @@ xfs_vm_writepage( } if (imap_valid) { - all_bh = 1; lock_buffer(bh); xfs_add_to_ioend(inode, bh, offset, type, &ioend, new_ioend); @@ -1102,7 +1095,7 @@ xfs_vm_writepage( end_index = last_index; xfs_cluster_write(inode, page->index + 1, &imap, &ioend, - wbc, all_bh, end_index); + wbc, end_index); } if (iohead) From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 02:41:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA8fDRe205179 for ; Fri, 10 Dec 2010 02:41:15 -0600 X-ASG-Debug-ID: 1291970582-5e3e03c90000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4CD66160F98B for ; Fri, 10 Dec 2010 00:43:02 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id AUrICICJOTst1Dfw for ; Fri, 10 Dec 2010 00:43:02 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PQyZB-0006ND-LB for xfs@oss.sgi.com; Fri, 10 Dec 2010 08:43:01 +0000 Message-Id: <20101210084301.616302405@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Fri, 10 Dec 2010 03:42:16 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 01/10] xfs: improve mapping type check in xfs_vm_writepage Subject: [PATCH 01/10] xfs: improve mapping type check in xfs_vm_writepage References: <20101210084215.259628825@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-fix-iomap-type-checking X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291970583 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Currently we only refuse a "read-only" mapping for writing out unwritten and delayed buffers, and refuse any other for overwrites. Improve the checks to require delalloc mappings for delayed buffers, and unwritten extent mappings for unwritten extents. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Index: xfs/fs/xfs/linux-2.6/xfs_aops.c =================================================================== --- xfs.orig/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:46:04.943253809 +0100 +++ xfs/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:47:20.583004194 +0100 @@ -1082,17 +1082,17 @@ xfs_vm_writepage( if (buffer_unwritten(bh) || buffer_delay(bh)) { int new_ioend = 0; - /* - * Make sure we don't use a read-only iomap - */ - if (flags == BMAPI_READ) - imap_valid = 0; - if (buffer_unwritten(bh)) { - type = IO_UNWRITTEN; + if (type != IO_UNWRITTEN) { + type = IO_UNWRITTEN; + imap_valid = 0; + } flags = BMAPI_WRITE | BMAPI_IGNSTATE; } else if (buffer_delay(bh)) { - type = IO_DELAY; + if (type != IO_DELAY) { + type = IO_DELAY; + imap_valid = 0; + } flags = BMAPI_ALLOCATE; if (wbc->sync_mode == WB_SYNC_NONE) @@ -1128,8 +1128,11 @@ xfs_vm_writepage( * That means it must already have extents allocated * underneath it. Map the extent by reading it. */ - if (!imap_valid || flags != BMAPI_READ) { + if (flags != BMAPI_READ) { flags = BMAPI_READ; + imap_valid = 0; + } + if (!imap_valid) { size = xfs_probe_cluster(inode, page, bh, head); err = xfs_map_blocks(inode, offset, size, &imap, flags); From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 02:41:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA8fEcO205193 for ; Fri, 10 Dec 2010 02:41:14 -0600 X-ASG-Debug-ID: 1291970584-466f037c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3357C1DC540 for ; Fri, 10 Dec 2010 00:43:04 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 2qit0vwMH5fbBRiF for ; Fri, 10 Dec 2010 00:43:04 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PQyZB-0006Nk-SY for xfs@oss.sgi.com; Fri, 10 Dec 2010 08:43:01 +0000 Message-Id: <20101210084301.858316107@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Fri, 10 Dec 2010 03:42:17 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 02/10] xfs: remove some dead bio handling code Subject: [PATCH 02/10] xfs: remove some dead bio handling code References: <20101210084215.259628825@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-aop-cleanups X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291970584 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean We'll never have BIO_EOPNOTSUPP set after calling submit_bio as this can only happen for discards, and used to happen for barriers, none of which is every submitted by xfs_submit_ioend_bio. Also remove the loop around bio_alloc as it will never fail due to it's mempool backing. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Index: xfs/fs/xfs/linux-2.6/xfs_aops.c =================================================================== --- xfs.orig/fs/xfs/linux-2.6/xfs_aops.c 2010-11-19 14:49:28.115261980 +0100 +++ xfs/fs/xfs/linux-2.6/xfs_aops.c 2010-11-19 14:49:29.417024168 +0100 @@ -380,26 +380,18 @@ xfs_submit_ioend_bio( submit_bio(wbc->sync_mode == WB_SYNC_ALL ? WRITE_SYNC_PLUG : WRITE, bio); - ASSERT(!bio_flagged(bio, BIO_EOPNOTSUPP)); - bio_put(bio); } STATIC struct bio * xfs_alloc_ioend_bio( struct buffer_head *bh) { - struct bio *bio; int nvecs = bio_get_nr_vecs(bh->b_bdev); - - do { - bio = bio_alloc(GFP_NOIO, nvecs); - nvecs >>= 1; - } while (!bio); + struct bio *bio = bio_alloc(GFP_NOIO, nvecs); ASSERT(bio->bi_private == NULL); bio->bi_sector = bh->b_blocknr * (bh->b_size >> 9); bio->bi_bdev = bh->b_bdev; - bio_get(bio); return bio; } @@ -470,9 +462,8 @@ xfs_submit_ioend( /* Pass 1 - start writeback */ do { next = ioend->io_list; - for (bh = ioend->io_buffer_head; bh; bh = bh->b_private) { + for (bh = ioend->io_buffer_head; bh; bh = bh->b_private) xfs_start_buffer_writeback(bh); - } } while ((ioend = next) != NULL); /* Pass 2 - submit I/O */ From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 02:41:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA8fCsI205167 for ; Fri, 10 Dec 2010 02:41:14 -0600 X-ASG-Debug-ID: 1291970582-0d8300140000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9019D1CAE1E3 for ; Fri, 10 Dec 2010 00:43:02 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id s2wTjFL5Sz94HG7Y for ; Fri, 10 Dec 2010 00:43:02 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PQyZB-0006Me-9F for xfs@oss.sgi.com; Fri, 10 Dec 2010 08:43:01 +0000 Message-Id: <20101210084215.259628825@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Fri, 10 Dec 2010 03:42:15 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 00/10] writeback updates V2 Subject: [PATCH 00/10] writeback updates V2 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291970582 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean - add IO_DIRECT per Dave's review comment - fix up a commit message as per Dave's review comment - add Reviewed-by: tags for Dave's reviews From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 02:41:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBA8fE6N205197 for ; Fri, 10 Dec 2010 02:41:14 -0600 X-ASG-Debug-ID: 1291970583-5e3f03950000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3DB91160F98F for ; Fri, 10 Dec 2010 00:43:04 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id Ro4r6ARB8ko6TmeQ for ; Fri, 10 Dec 2010 00:43:04 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PQyZD-0006Rw-Ia for xfs@oss.sgi.com; Fri, 10 Dec 2010 08:43:03 +0000 Message-Id: <20101210084303.537974157@bombadil.infradead.org> User-Agent: quilt/0.48-1 Date: Fri, 10 Dec 2010 03:42:25 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 10/10] xfs: simplify xfs_map_at_offset Subject: [PATCH 10/10] xfs: simplify xfs_map_at_offset References: <20101210084215.259628825@bombadil.infradead.org> Content-Disposition: inline; filename=xfs-simplify-xfs_map_at_offset X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291970584 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Move the buffer locking into the callers as they need to do it wether they call xfs_map_at_offset or not. Remove the b_bdev assignment, which is already done by get_blocks. Remove the duplicate extent type asserts in xfs_convert_page just before calling xfs_map_at_offset. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Index: xfs/fs/xfs/linux-2.6/xfs_aops.c =================================================================== --- xfs.orig/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:52:23.144273297 +0100 +++ xfs/fs/xfs/linux-2.6/xfs_aops.c 2010-12-09 15:52:41.846254159 +0100 @@ -626,9 +626,7 @@ xfs_map_at_offset( ASSERT(imap->br_startblock != HOLESTARTBLOCK); ASSERT(imap->br_startblock != DELAYSTARTBLOCK); - lock_buffer(bh); xfs_map_buffer(inode, bh, imap, offset); - bh->b_bdev = xfs_find_bdev_for_inode(inode); set_buffer_mapped(bh); clear_buffer_delay(bh); clear_buffer_unwritten(bh); @@ -751,12 +749,8 @@ xfs_convert_page( continue; } - ASSERT(imap->br_startblock != HOLESTARTBLOCK); - ASSERT(imap->br_startblock != DELAYSTARTBLOCK); - - if (type == IO_OVERWRITE) - lock_buffer(bh); - else + lock_buffer(bh); + if (type != IO_OVERWRITE) xfs_map_at_offset(inode, bh, imap, offset); xfs_add_to_ioend(inode, bh, offset, type, ioendp, done); @@ -1041,9 +1035,8 @@ xfs_vm_writepage( imap_valid = xfs_imap_valid(inode, &imap, offset); } if (imap_valid) { - if (type == IO_OVERWRITE) - lock_buffer(bh); - else + lock_buffer(bh); + if (type != IO_OVERWRITE) xfs_map_at_offset(inode, bh, &imap, offset); xfs_add_to_ioend(inode, bh, offset, type, &ioend, new_ioend); From branto@redhat.com Fri Dec 10 04:05:08 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBAA58Lf221316 for ; Fri, 10 Dec 2010 04:05:08 -0600 X-ASG-Debug-ID: 1291975617-0e1a01c50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 730DB1CAEC64; Fri, 10 Dec 2010 02:06:57 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id dGPWk9vB5r8B2Ddu; Fri, 10 Dec 2010 02:06:57 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oBAA6pus022927 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 10 Dec 2010 05:06:52 -0500 Received: from [10.34.26.208] (dhcp-26-208.brq.redhat.com [10.34.26.208]) by int-mx12.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id oBAA6o9B002883; Fri, 10 Dec 2010 05:06:50 -0500 X-ASG-Orig-Subj: Re: [PATCH] xfstests: fix 108 golden output Subject: Re: [PATCH] xfstests: fix 108 golden output From: Boris Ranto To: aelder@sgi.com Cc: Christoph Hellwig , xfs@oss.sgi.com In-Reply-To: <1291929579.13355.30.camel@doink> References: <20101110125855.GA18357@infradead.org> <1291929579.13355.30.camel@doink> Content-Type: text/plain; charset="UTF-8" Date: Fri, 10 Dec 2010 11:06:49 +0100 Message-ID: <1291975609.3282.7.camel@dhcp-31-190.brq.redhat.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.68 on 10.5.11.25 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291975618 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, 2010-12-09 at 15:19 -0600, Alex Elder wrote: > On Wed, 2010-11-10 at 07:58 -0500, Christoph Hellwig wrote: > > The new common scratch mount filter produces slightly different > > whitespaces than the old home grown filter, so adjust the golden > > output. > > > > Signed-off-by: Christoph Hellwig > > I found out why this is happening. I get no > such error, and Dave Chinner said he wasn't seeing > it either. > > xfs_quota is formatting its output such that the > second and later columns always align at a certain > offset from the beginning of the line. As a result, > path names assigned as SCRATCH_DEV of different > lengths will produce different (filtered) output, > with more or fewer blanks between SCRATCH_DEV and > the usage number. > > Boris Ranto has proposed a change that would > add the "-b" flag to diff when checking output > against golden output. That should fix it, but > it's possible we *want* differences in white > space to matter in some cases. Have to look > into this. > > -Alex > The change was designed to add the "-b" flag only for this test case. Any other test case could also modify its diff options through DIFF_OPTIONS variable in its config file ($seq.config). -Boris From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 07:27:50 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_32, J_CHICKENPOX_33 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBADRnPJ257855 for ; Fri, 10 Dec 2010 07:27:50 -0600 X-ASG-Debug-ID: 1291987779-068c00d70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 418EA1CB11D7 for ; Fri, 10 Dec 2010 05:29:39 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id YEPyLRg9sR2kSd2v for ; Fri, 10 Dec 2010 05:29:39 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PR32V-0006wp-QO; Fri, 10 Dec 2010 13:29:35 +0000 Date: Fri, 10 Dec 2010 08:29:35 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Subject: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Message-ID: <20101210132935.GA24210@infradead.org> References: <1291341315-31338-1-git-send-email-david@fromorbit.com> <20101203043846.GB23339@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101203043846.GB23339@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291987779 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, Dec 03, 2010 at 03:38:46PM +1100, Dave Chinner wrote: > FWIW, while these macros are the best way to make a simple backport > is possible, I just discovered that mainline has a %pV format > operator that allows an implementation like: > > void > xfs_fs_cmn_err( > const char *lvl, > struct xfs_mount *mp, > const char *fmt, > ...) > { > struct va_format vaf; > va_list args; > > va_start(args, fmt); > vaf.fmt = fmt; > vaf.va = &args; > > printk("%sFilesystem %s: %pV", lvl, mp->m_fsname, &vaf); > va_end(args); > > BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); > } With this we can also keep the existing integer-based CE_ values and do trivial array lookup. That also avoids having to do a strcmp for every message printed. From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 08:34:08 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBAEY5wX008575 for ; Fri, 10 Dec 2010 08:34:08 -0600 X-ASG-Debug-ID: 1291991755-34a301900000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D29D316102D4 for ; Fri, 10 Dec 2010 06:35:55 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id no34PHDiQFd7dlrR for ; Fri, 10 Dec 2010 06:35:55 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PR44g-0000QH-Ne; Fri, 10 Dec 2010 14:35:54 +0000 Date: Fri, 10 Dec 2010 09:35:54 -0500 From: Christoph Hellwig To: Boris Ranto Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfstests: ignore absolute address in filename in test case 237 Subject: Re: xfstests: ignore absolute address in filename in test case 237 Message-ID: <20101210143554.GA1415@infradead.org> References: <1291899944.3196.11.camel@dhcp-31-190.brq.redhat.com> <1291902047.3196.26.camel@dhcp-31-190.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1291902047.3196.26.camel@dhcp-31-190.brq.redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291991755 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean I don't mind the patch, but what version of getfacl would produce an absolute filename? From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 08:35:28 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBAEZSC1008868 for ; Fri, 10 Dec 2010 08:35:28 -0600 X-ASG-Debug-ID: 1291991837-5b3d02d80000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 23AF91DD3D2 for ; Fri, 10 Dec 2010 06:37:18 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id PL7wRchtucD3EIRQ for ; Fri, 10 Dec 2010 06:37:18 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PR461-0000UV-N1; Fri, 10 Dec 2010 14:37:17 +0000 Date: Fri, 10 Dec 2010 09:37:17 -0500 From: Christoph Hellwig To: Boris Ranto Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfstests: fix 108 through config mechanism Subject: Re: xfstests: fix 108 through config mechanism Message-ID: <20101210143717.GB1415@infradead.org> References: <1291905612.3196.49.camel@dhcp-31-190.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1291905612.3196.49.camel@dhcp-31-190.brq.redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291991838 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean I don't rally like the per-test option. What about adding a _filter_xfs_quota helper that uses sed to output a canonical number of whitespaces? From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 09:02:07 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_64 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBAF271j014086 for ; Fri, 10 Dec 2010 09:02:07 -0600 X-ASG-Debug-ID: 1291993437-6401039a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A72E01DD9E6 for ; Fri, 10 Dec 2010 07:03:57 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id nXXEmtB1TClcLKz9 for ; Fri, 10 Dec 2010 07:03:57 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PR4Vp-0005OZ-96 for xfs@oss.sgi.com; Fri, 10 Dec 2010 15:03:57 +0000 Date: Fri, 10 Dec 2010 10:03:57 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH] xfs: clean up xfs_alloc_ag_vextent_exact Subject: [PATCH] xfs: clean up xfs_alloc_ag_vextent_exact Message-ID: <20101210150357.GA20726@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291993437 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Use a goto label to consolidate all block not found cases, and add a tracepoint for them. Also clean up a few whitespace issues. Based on an earlier patch from Dave Chinner. Signed-off-by: Christoph Hellwig Index: linux-2.6/fs/xfs/linux-2.6/xfs_trace.h =================================================================== --- linux-2.6.orig/fs/xfs/linux-2.6/xfs_trace.h +++ linux-2.6/fs/xfs/linux-2.6/xfs_trace.h @@ -1421,6 +1421,7 @@ DEFINE_EVENT(xfs_alloc_class, name, \ TP_PROTO(struct xfs_alloc_arg *args), \ TP_ARGS(args)) DEFINE_ALLOC_EVENT(xfs_alloc_exact_done); +DEFINE_ALLOC_EVENT(xfs_alloc_exact_notfound); DEFINE_ALLOC_EVENT(xfs_alloc_exact_error); DEFINE_ALLOC_EVENT(xfs_alloc_near_nominleft); DEFINE_ALLOC_EVENT(xfs_alloc_near_first); Index: linux-2.6/fs/xfs/xfs_alloc.c =================================================================== --- linux-2.6.orig/fs/xfs/xfs_alloc.c +++ linux-2.6/fs/xfs/xfs_alloc.c @@ -577,61 +577,58 @@ xfs_alloc_ag_vextent_exact( xfs_extlen_t rlen; /* length of returned extent */ ASSERT(args->alignment == 1); + /* * Allocate/initialize a cursor for the by-number freespace btree. */ bno_cur = xfs_allocbt_init_cursor(args->mp, args->tp, args->agbp, - args->agno, XFS_BTNUM_BNO); + args->agno, XFS_BTNUM_BNO); + /* * Lookup bno and minlen in the btree (minlen is irrelevant, really). * Look for the closest free block <= bno, it must contain bno * if any free block does. */ - if ((error = xfs_alloc_lookup_le(bno_cur, args->agbno, args->minlen, &i))) + error = xfs_alloc_lookup_le(bno_cur, args->agbno, args->minlen, &i); + if (error) goto error0; - if (!i) { - /* - * Didn't find it, return null. - */ - xfs_btree_del_cursor(bno_cur, XFS_BTREE_NOERROR); - args->agbno = NULLAGBLOCK; - return 0; - } + if (!i) + goto not_found; + /* * Grab the freespace record. */ - if ((error = xfs_alloc_get_rec(bno_cur, &fbno, &flen, &i))) + error = xfs_alloc_get_rec(bno_cur, &fbno, &flen, &i); + if (error) goto error0; XFS_WANT_CORRUPTED_GOTO(i == 1, error0); ASSERT(fbno <= args->agbno); minend = args->agbno + args->minlen; maxend = args->agbno + args->maxlen; fend = fbno + flen; + /* * Give up if the freespace isn't long enough for the minimum request. */ - if (fend < minend) { - xfs_btree_del_cursor(bno_cur, XFS_BTREE_NOERROR); - args->agbno = NULLAGBLOCK; - return 0; - } + if (fend < minend) + goto not_found; + /* * End of extent will be smaller of the freespace end and the * maximal requested end. - */ - end = XFS_AGBLOCK_MIN(fend, maxend); - /* + * * Fix the length according to mod and prod if given. */ + end = XFS_AGBLOCK_MIN(fend, maxend); args->len = end - args->agbno; xfs_alloc_fix_len(args); - if (!xfs_alloc_fix_minleft(args)) { - xfs_btree_del_cursor(bno_cur, XFS_BTREE_NOERROR); - return 0; - } + if (!xfs_alloc_fix_minleft(args)) + goto not_found; + rlen = args->len; ASSERT(args->agbno + rlen <= fend); end = args->agbno + rlen; + /* * We are allocating agbno for rlen [agbno .. end] * Allocate/initialize a cursor for the by-size btree. @@ -640,16 +637,25 @@ xfs_alloc_ag_vextent_exact( args->agno, XFS_BTNUM_CNT); ASSERT(args->agbno + args->len <= be32_to_cpu(XFS_BUF_TO_AGF(args->agbp)->agf_length)); - if ((error = xfs_alloc_fixup_trees(cnt_cur, bno_cur, fbno, flen, - args->agbno, args->len, XFSA_FIXUP_BNO_OK))) { + error = xfs_alloc_fixup_trees(cnt_cur, bno_cur, fbno, flen, args->agbno, + args->len, XFSA_FIXUP_BNO_OK); + if (error) { xfs_btree_del_cursor(cnt_cur, XFS_BTREE_ERROR); goto error0; } + xfs_btree_del_cursor(bno_cur, XFS_BTREE_NOERROR); xfs_btree_del_cursor(cnt_cur, XFS_BTREE_NOERROR); - trace_xfs_alloc_exact_done(args); args->wasfromfl = 0; + trace_xfs_alloc_exact_done(args); + return 0; + +not_found: + /* Didn't find it, return null. */ + xfs_btree_del_cursor(bno_cur, XFS_BTREE_NOERROR); + args->agbno = NULLAGBLOCK; + trace_xfs_alloc_exact_notfound(args); return 0; error0: From BATV+870d71e9bf4a5d360c11+2665+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 10 09:02:22 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_66 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBAF2MQ4014147 for ; Fri, 10 Dec 2010 09:02:22 -0600 X-ASG-Debug-ID: 1291993452-441702030000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 582381CB1B0E for ; Fri, 10 Dec 2010 07:04:12 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id n2w9BkPur0QVIXQi for ; Fri, 10 Dec 2010 07:04:12 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PR4W3-0005Oh-U4 for xfs@oss.sgi.com; Fri, 10 Dec 2010 15:04:11 +0000 Date: Fri, 10 Dec 2010 10:04:11 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH] xfs: factor duplicate code in xfs_alloc_ag_vextent_near into a helper Subject: [PATCH] xfs: factor duplicate code in xfs_alloc_ag_vextent_near into a helper Message-ID: <20101210150411.GB20726@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1291993452 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Add a new xfs_alloc_find_best_extent that does a forward/backward search in the allocation btree. That code previously was existed two times in xfs_alloc_ag_vextent_near, once for each search direction. Based on an earlier patch from Dave Chinner. Signed-off-by: Christoph Hellwig Index: xfs/fs/xfs/xfs_alloc.c =================================================================== --- xfs.orig/fs/xfs/xfs_alloc.c 2010-12-10 09:50:07.681023471 +0100 +++ xfs/fs/xfs/xfs_alloc.c 2010-12-10 09:51:32.874005592 +0100 @@ -665,6 +665,95 @@ error0: } /* + * Search the btree in a given direction via the search cursor and compare + * the records found against the good extent we've already found. + */ +STATIC int +xfs_alloc_find_best_extent( + struct xfs_alloc_arg *args, /* allocation argument structure */ + struct xfs_btree_cur **gcur, /* good cursor */ + struct xfs_btree_cur **scur, /* searching cursor */ + xfs_agblock_t gdiff, /* difference for search comparison */ + xfs_agblock_t *sbno, /* extent found by search */ + xfs_extlen_t *slen, + xfs_extlen_t *slena, /* aligned length */ + int dir) /* 0 = search right, 1 = search left */ +{ + xfs_agblock_t bno; + xfs_agblock_t new; + xfs_agblock_t sdiff; + int error; + int i; + + /* The good extent is perfect, no need to search. */ + if (!gdiff) + goto out_use_good; + + /* + * Look until we find a better one, run out of space or run off the end. + */ + do { + error = xfs_alloc_get_rec(*scur, sbno, slen, &i); + if (error) + goto error0; + XFS_WANT_CORRUPTED_GOTO(i == 1, error0); + xfs_alloc_compute_aligned(*sbno, *slen, args->alignment, + args->minlen, &bno, slena); + + /* + * The good extent is closer than this one. + */ + if (!dir) { + if (bno >= args->agbno + gdiff) + goto out_use_good; + } else { + if (bno <= args->agbno - gdiff) + goto out_use_good; + } + + /* + * Same distance, compare length and pick the best. + */ + if (*slena >= args->minlen) { + args->len = XFS_EXTLEN_MIN(*slena, args->maxlen); + xfs_alloc_fix_len(args); + + sdiff = xfs_alloc_compute_diff(args->agbno, args->len, + args->alignment, *sbno, + *slen, &new); + + /* + * Choose closer size and invalidate other cursor. + */ + if (sdiff < gdiff) + goto out_use_search; + goto out_use_good; + } + + if (!dir) + error = xfs_btree_increment(*scur, 0, &i); + else + error = xfs_btree_decrement(*scur, 0, &i); + if (error) + goto error0; + } while (i); + +out_use_good: + xfs_btree_del_cursor(*scur, XFS_BTREE_NOERROR); + *scur = NULL; + return 0; + +out_use_search: + xfs_btree_del_cursor(*gcur, XFS_BTREE_NOERROR); + *gcur = NULL; + return 0; + +error0: + /* caller invalidates cursors */ + return error; +} + +/* * Allocate a variable extent near bno in the allocation group agno. * Extent's length (returned in len) will be between minlen and maxlen, * and of the form k * prod + mod unless there's nothing that large. @@ -931,203 +1020,45 @@ xfs_alloc_ag_vextent_near( } } } while (bno_cur_lt || bno_cur_gt); + /* * Got both cursors still active, need to find better entry. */ if (bno_cur_lt && bno_cur_gt) { - /* - * Left side is long enough, look for a right side entry. - */ if (ltlena >= args->minlen) { /* - * Fix up the length. + * Left side is good, look for a right side entry. */ args->len = XFS_EXTLEN_MIN(ltlena, args->maxlen); xfs_alloc_fix_len(args); - rlen = args->len; - ltdiff = xfs_alloc_compute_diff(args->agbno, rlen, + ltdiff = xfs_alloc_compute_diff(args->agbno, args->len, args->alignment, ltbno, ltlen, <new); + + error = xfs_alloc_find_best_extent(args, + &bno_cur_lt, &bno_cur_gt, + ltdiff, >bno, >len, >lena, + 0 /* search right */); + } else { + ASSERT(gtlena >= args->minlen); + /* - * Not perfect. - */ - if (ltdiff) { - /* - * Look until we find a better one, run out of - * space, or run off the end. - */ - while (bno_cur_lt && bno_cur_gt) { - if ((error = xfs_alloc_get_rec( - bno_cur_gt, >bno, - >len, &i))) - goto error0; - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - xfs_alloc_compute_aligned(gtbno, gtlen, - args->alignment, args->minlen, - >bnoa, >lena); - /* - * The left one is clearly better. - */ - if (gtbnoa >= args->agbno + ltdiff) { - xfs_btree_del_cursor( - bno_cur_gt, - XFS_BTREE_NOERROR); - bno_cur_gt = NULL; - break; - } - /* - * If we reach a big enough entry, - * compare the two and pick the best. - */ - if (gtlena >= args->minlen) { - args->len = - XFS_EXTLEN_MIN(gtlena, - args->maxlen); - xfs_alloc_fix_len(args); - rlen = args->len; - gtdiff = xfs_alloc_compute_diff( - args->agbno, rlen, - args->alignment, - gtbno, gtlen, >new); - /* - * Right side is better. - */ - if (gtdiff < ltdiff) { - xfs_btree_del_cursor( - bno_cur_lt, - XFS_BTREE_NOERROR); - bno_cur_lt = NULL; - } - /* - * Left side is better. - */ - else { - xfs_btree_del_cursor( - bno_cur_gt, - XFS_BTREE_NOERROR); - bno_cur_gt = NULL; - } - break; - } - /* - * Fell off the right end. - */ - if ((error = xfs_btree_increment( - bno_cur_gt, 0, &i))) - goto error0; - if (!i) { - xfs_btree_del_cursor( - bno_cur_gt, - XFS_BTREE_NOERROR); - bno_cur_gt = NULL; - break; - } - } - } - /* - * The left side is perfect, trash the right side. - */ - else { - xfs_btree_del_cursor(bno_cur_gt, - XFS_BTREE_NOERROR); - bno_cur_gt = NULL; - } - } - /* - * It's the right side that was found first, look left. - */ - else { - /* - * Fix up the length. + * Right side is good, look for a left side entry. */ args->len = XFS_EXTLEN_MIN(gtlena, args->maxlen); xfs_alloc_fix_len(args); - rlen = args->len; - gtdiff = xfs_alloc_compute_diff(args->agbno, rlen, + gtdiff = xfs_alloc_compute_diff(args->agbno, args->len, args->alignment, gtbno, gtlen, >new); - /* - * Right side entry isn't perfect. - */ - if (gtdiff) { - /* - * Look until we find a better one, run out of - * space, or run off the end. - */ - while (bno_cur_lt && bno_cur_gt) { - if ((error = xfs_alloc_get_rec( - bno_cur_lt, <bno, - <len, &i))) - goto error0; - XFS_WANT_CORRUPTED_GOTO(i == 1, error0); - xfs_alloc_compute_aligned(ltbno, ltlen, - args->alignment, args->minlen, - <bnoa, <lena); - /* - * The right one is clearly better. - */ - if (ltbnoa <= args->agbno - gtdiff) { - xfs_btree_del_cursor( - bno_cur_lt, - XFS_BTREE_NOERROR); - bno_cur_lt = NULL; - break; - } - /* - * If we reach a big enough entry, - * compare the two and pick the best. - */ - if (ltlena >= args->minlen) { - args->len = XFS_EXTLEN_MIN( - ltlena, args->maxlen); - xfs_alloc_fix_len(args); - rlen = args->len; - ltdiff = xfs_alloc_compute_diff( - args->agbno, rlen, - args->alignment, - ltbno, ltlen, <new); - /* - * Left side is better. - */ - if (ltdiff < gtdiff) { - xfs_btree_del_cursor( - bno_cur_gt, - XFS_BTREE_NOERROR); - bno_cur_gt = NULL; - } - /* - * Right side is better. - */ - else { - xfs_btree_del_cursor( - bno_cur_lt, - XFS_BTREE_NOERROR); - bno_cur_lt = NULL; - } - break; - } - /* - * Fell off the left end. - */ - if ((error = xfs_btree_decrement( - bno_cur_lt, 0, &i))) - goto error0; - if (!i) { - xfs_btree_del_cursor(bno_cur_lt, - XFS_BTREE_NOERROR); - bno_cur_lt = NULL; - break; - } - } - } - /* - * The right side is perfect, trash the left side. - */ - else { - xfs_btree_del_cursor(bno_cur_lt, - XFS_BTREE_NOERROR); - bno_cur_lt = NULL; - } + + error = xfs_alloc_find_best_extent(args, + &bno_cur_gt, &bno_cur_lt, + gtdiff, <bno, <len, <lena, + 1 /* search left */); } + + if (error) + goto error0; } + /* * If we couldn't get anything, give up. */ @@ -1136,6 +1067,7 @@ xfs_alloc_ag_vextent_near( args->agbno = NULLAGBLOCK; return 0; } + /* * At this point we have selected a freespace entry, either to the * left or to the right. If it's on the right, copy all the @@ -1152,6 +1084,7 @@ xfs_alloc_ag_vextent_near( j = 1; } else j = 0; + /* * Fix up the length and compute the useful address. */ From lczerner@redhat.com Fri Dec 10 09:51:48 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,J_CHICKENPOX_43, J_CHICKENPOX_44,J_CHICKENPOX_64,J_CHICKENPOX_66,J_CHICKENPOX_73, LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBAFpm7J023337 for ; Fri, 10 Dec 2010 09:51:48 -0600 X-ASG-Debug-ID: 1291996417-5c5002db0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2E1EF1CAA020 for ; Fri, 10 Dec 2010 07:53:37 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id doGYPOhAEjCKUZ0N for ; Fri, 10 Dec 2010 07:53:37 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oBAFrWKh019682 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 10 Dec 2010 10:53:32 -0500 Received: from dhcp-lab-213.englab.brq.redhat.com (dhcp-27-109.brq.redhat.com [10.34.27.109]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id oBAFrUNT008797; Fri, 10 Dec 2010 10:53:30 -0500 From: Lukas Czerner To: xfs@oss.sgi.com Cc: esandeen@redhat.com, hch@infradead.org, lczerner@redhat.com X-ASG-Orig-Subj: [PATCH] Add test 248: Check filesystem FITRIM implementation Subject: [PATCH] Add test 248: Check filesystem FITRIM implementation Date: Fri, 10 Dec 2010 16:53:27 +0100 Message-Id: <1291996407-26251-1-git-send-email-lczerner@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1291996418 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean FITRIM ioctl is used on a mounted filesystem to discard (or "trim") blocks which are not in use by the filesystem. This is useful for solid-state drives (SSDs) and thinly-provi-sioned storage. This test helps to verify filesystem FITRIM implementation to assure that it does not corrupts data. This test creates checksums of all files in /usr/share/doc directory and run several processes which clear its working directory on SCRATCH_MNT, then copy everything from /usr/share/doc into its working directory, create list of files in working directory and its checksums and compare it with the original list of checksums. Every process works in the loop so it repeat remove->copy->check, while fstrim tool is running simultaneously. Fstrim is just a helper tool which uses FITRIM ioctl to actually do the filesystem discard. I found this very useful because when the FITRIM is really buggy (thus data-destroying) the 248 test will notice, because checksums will most likely change. Signed-off-by: Lukas Czerner --- 248 | 184 +++++++++++++++++++++++++++++++++++++++++ 248.out | 3 + group | 1 + src/Makefile | 2 +- src/fstrim.c | 257 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 446 insertions(+), 1 deletions(-) create mode 100755 248 create mode 100644 248.out create mode 100644 src/fstrim.c diff --git a/248 b/248 new file mode 100755 index 0000000..a6cfce2 --- /dev/null +++ b/248 @@ -0,0 +1,184 @@ +#!/bin/bash +# FS QA Test No. 248 +# +# This test was created in order to verify filesystem FITRIM implementation. +# By many concurrent copy and remove operations and checking that files +# does not change after copied into SCRATCH_MNT test if FITRIM implementation +# corrupts the filesystem (data/metadata). +# +#----------------------------------------------------------------------- +# Copyright 2010 (C) Red Hat, Inc., Lukas Czerner +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it would be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +#----------------------------------------------------------------------- + +owner=lczerner@redhat.com + +seq=`basename $0` +echo "QA output created by $seq" + +here=`pwd` +tmp=`mktemp -d` +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 3 +trap "_destroy; exit \$status" 2 15 +chpid=0 +mypid=$$ + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +# real QA test starts here +_supported_fs generic +_supported_os Linux +_require_scratch +_scratch_mkfs >/dev/null 2>&1 +_scratch_mount + +_cleanup() +{ + rm -rf $tmp +} + +_destroy() +{ + kill $pids $fstrim_pid + wait $pids $fstrim_pid + rm -rf $tmp +} + +_destroy_fstrim() +{ + kill $fpid + wait $fpid +} + +_fail() +{ + echo "$1" + kill $mypid +} + +## +# Background FSTRIM loop. We are trimming the device in the loop and for +# better test coverage, we are doing whole device trim followed by several +# smaller trims. +## +fstrim_loop() +{ + trap "_destroy_fstrim; exit \$status" 2 15 + fsize=$(df | grep $SCRATCH_MNT | grep $SCRATCH_DEV | awk '{print $2}') + + while true ; do + step=1048576 + start=0 + $here/src/fstrim $SCRATCH_MNT & + fpid=$! + wait $fpid + while [ $start -lt $fsize ] ; do + $here/src/fstrim -s ${start}k -l ${step}k $SCRATCH_MNT & + fpid=$! + + ## + # All the waiting is done because Bash is incredibly + # stupid. As you know, fstrim_loop is run at background + # and when the test is over, or when it is killed (with + # ^C), because of trap, it tries to kill fstrim_loop. + # However, it does not kill currently running commands, + # so fstrim might be still running making it impossible + # to umount the SCRATCH_MNT and hence resulting in + # error. + ## + wait $fpid + start=$(( $start + $step )) + done + done +} + +function check_sums() { + dir=$1 + + ( + cd $SCRATCH_MNT/$p + find -P . -xdev -type f -print0 | xargs -0 md5sum | sort -o $tmp/stress.$$.$p + ) + + diff $tmp/content.sums $tmp/stress.$$.$p + if [ $? -ne 0 ]; then + _fail "!!!Checksums has changed - Filesystem possibly corrupted!!!\n" + fi + rm -f $tmp/stress.$$.$p +} + +function run_process() { + local p=$1 + repeat=10 + trap "kill $chpid; wait $chpid" 2 15 + + sleep $((10*$p))s & + export chpid=$! && wait $chpid &> /dev/null + chpid=0 + + while [ $repeat -gt 0 ]; do + + # Remove old directories. + rm -rf $SCRATCH_MNT/$p + export chpid=$! && wait $chpid &> /dev/null + + # Copy content -> partition. + mkdir $SCRATCH_MNT/$p + cp -ax $content/* $SCRATCH_MNT/$p + export chpid=$! && wait $chpid &> /dev/null + + check_sums + repeat=$(( $repeat - 1 )) + done +} + +nproc=20 +content=/usr/share/doc + +# Check for FITRIM support +echo -n "Checking FITRIM support: " +$here/src/fstrim -l 10M $SCRATCH_MNT +[ $? -ne 0 ] && exit +echo "done." + +mkdir -p $tmp + +( +cd $content +find -P . -xdev -type f -print0 | xargs -0 md5sum | sort -o $tmp/content.sums +) + +echo -n "Running the test: " +pids="" +fstrim_loop & +fstrim_pid=$! +p=1 +while [ $p -le $nproc ]; do + run_process $p & + pids="$pids $!" + p=$(($p+1)) +done +echo "done." + +wait $pids +kill $fstrim_pid +wait $fstrim_pid + +status=0 + +exit diff --git a/248.out b/248.out new file mode 100644 index 0000000..880d9c7 --- /dev/null +++ b/248.out @@ -0,0 +1,3 @@ +QA output created by 248 +Checking FITRIM support: done. +Running the test: done. diff --git a/group b/group index 0f94dd9..19eec07 100644 --- a/group +++ b/group @@ -361,3 +361,4 @@ deprecated 245 auto quick dir 246 auto quick rw 247 auto quick rw +248 ioctl trim diff --git a/src/Makefile b/src/Makefile index b827bd0..885fd65 100644 --- a/src/Makefile +++ b/src/Makefile @@ -17,7 +17,7 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \ locktest unwritten_mmap bulkstat_unlink_test t_stripealign \ bulkstat_unlink_test_modified t_dir_offset t_futimens t_immutable \ - stale_handle + stale_handle fstrim SUBDIRS = diff --git a/src/fstrim.c b/src/fstrim.c new file mode 100644 index 0000000..45ad841 --- /dev/null +++ b/src/fstrim.c @@ -0,0 +1,257 @@ +/* + * fstrim.c -- discard the part (or whole) of mounted filesystem. + * + * Copyright (C) 2009 Red Hat, Inc., Lukas Czerner + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see . + * + * This program uses FITRIM ioctl to discard parts or the whole filesystem + * online (mounted). You can specify range (start and lenght) to be + * discarded, or simply discard while filesystem. + * + * Usage: fstrim [options] + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include + +#ifndef FITRIM +struct fstrim_range { + uint64_t start; + uint64_t len; + uint64_t minlen; +}; +#define FITRIM _IOWR('X', 121, struct fstrim_range) +#endif + +const char *program_name = "fstrim"; + +struct options { + struct fstrim_range *range; + char mpoint[PATH_MAX]; + char verbose; +}; + +static void usage(void) +{ + fprintf(stderr, + "Usage: %s [-s start] [-l length] [-m minimum-extent]" + " [-v] {mountpoint}\n\t" + "-s Starting Byte to discard from\n\t" + "-l Number of Bytes to discard from the start\n\t" + "-m Minimum extent length to discard\n\t" + "-v Verbose - number of discarded bytes\n", + program_name); +} + +static void err_exit(const char *fmt, ...) +{ + va_list pvar; + va_start(pvar, fmt); + vfprintf(stderr, fmt, pvar); + va_end(pvar); + usage(); + exit(EXIT_FAILURE); +} + +/** + * Get the number from argument. It can be number followed by + * units: k|K, m|M, g|G, t|T + */ +static unsigned long long get_number(char **optarg) +{ + char *opt, *end; + unsigned long long number, max; + + /* get the max to avoid overflow */ + max = ULLONG_MAX / 1024; + number = 0; + opt = *optarg; + + if (*opt == '-') { + err_exit("%s: %s (%s)\n", program_name, + strerror(ERANGE), *optarg); + } + + errno = 0; + number = strtoul(opt, &end , 0); + if (errno) + err_exit("%s: %s (%s)\n", program_name, + strerror(errno), *optarg); + + /* + * Convert units to numbers. Fall-through stack is used for units + * so absence of breaks is intentional. + */ + switch (*end) { + case 'T': /* terabytes */ + case 't': + if (number > max) + err_exit("%s: %s (%s)\n", program_name, + strerror(ERANGE), *optarg); + number *= 1024; + case 'G': /* gigabytes */ + case 'g': + if (number > max) + err_exit("%s: %s (%s)\n", program_name, + strerror(ERANGE), *optarg); + number *= 1024; + case 'M': /* megabytes */ + case 'm': + if (number > max) + err_exit("%s: %s (%s)\n", program_name, + strerror(ERANGE), *optarg); + number *= 1024; + case 'K': /* kilobytes */ + case 'k': + if (number > max) + err_exit("%s: %s (%s)\n", program_name, + strerror(ERANGE), *optarg); + number *= 1024; + end++; + case '\0': /* end of the string */ + break; + default: + err_exit("%s: %s (%s)\n", program_name, + strerror(EINVAL), *optarg); + return 0; + } + + if (*end != '\0') { + err_exit("%s: %s (%s)\n", program_name, + strerror(EINVAL), *optarg); + } + + return number; +} + +static int parse_opts(int argc, char **argv, struct options *opts) +{ + int c; + + while ((c = getopt(argc, argv, "s:l:m:v")) != EOF) { + switch (c) { + case 's': /* starting point */ + opts->range->start = get_number(&optarg); + break; + case 'l': /* length */ + opts->range->len = get_number(&optarg); + break; + case 'm': /* minlen */ + opts->range->minlen = get_number(&optarg); + break; + case 'v': /* verbose */ + opts->verbose = 1; + break; + default: + return EXIT_FAILURE; + } + } + + return 0; +} + +int main(int argc, char **argv) +{ + struct options *opts; + struct stat sb; + int fd, err = 0, ret = EXIT_FAILURE; + + opts = malloc(sizeof(struct options)); + if (!opts) + err_exit("%s: malloc(): %s\n", program_name, strerror(errno)); + + opts->range = NULL; + opts->verbose = 0; + + if (argc > 1) + strncpy(opts->mpoint, argv[argc - 1], sizeof(opts->mpoint)); + + opts->range = calloc(1, sizeof(struct fstrim_range)); + if (!opts->range) { + fprintf(stderr, "%s: calloc(): %s\n", program_name, + strerror(errno)); + goto free_opts; + } + + opts->range->len = ULLONG_MAX; + + if (argc > 2) + err = parse_opts(argc, argv, opts); + + if (err) { + usage(); + goto free_opts; + } + + if (strnlen(opts->mpoint, 1) < 1) { + fprintf(stderr, "%s: You have to specify mount point.\n", + program_name); + usage(); + goto free_opts; + } + + if (stat(opts->mpoint, &sb) == -1) { + fprintf(stderr, "%s: %s: %s\n", program_name, + opts->mpoint, strerror(errno)); + usage(); + goto free_opts; + } + + if (!S_ISDIR(sb.st_mode)) { + fprintf(stderr, "%s: %s: (%s)\n", program_name, + opts->mpoint, strerror(ENOTDIR)); + usage(); + goto free_opts; + } + + fd = open(opts->mpoint, O_RDONLY); + if (fd < 0) { + fprintf(stderr, "%s: open(%s): %s\n", program_name, + opts->mpoint, strerror(errno)); + goto free_opts; + } + + if (ioctl(fd, FITRIM, opts->range)) { + fprintf(stderr, "%s: FSTRIM: %s\n", program_name, + strerror(errno)); + goto free_opts; + } + + if ((opts->verbose) && (opts->range)) + fprintf(stdout, "%lu Bytes were trimmed\n", opts->range->len); + + ret = EXIT_SUCCESS; + +free_opts: + if (opts) { + if (opts->range) + free(opts->range); + free(opts); + } + + return ret; +} -- 1.7.2.3 From aelder@sgi.com Fri Dec 10 11:53:47 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBAHrlUH041658 for ; Fri, 10 Dec 2010 11:53:47 -0600 Received: from stout.americas.sgi.com (stout.americas.sgi.com [128.162.232.50]) by relay2.corp.sgi.com (Postfix) with ESMTP id EE5FF304064; Fri, 10 Dec 2010 09:55:34 -0800 (PST) Received: from stout.americas.sgi.com (localhost6.localdomain6 [127.0.0.1]) by stout.americas.sgi.com (8.14.4/8.14.2) with ESMTP id oBAHtYcH017576; Fri, 10 Dec 2010 11:55:34 -0600 Received: (from aelder@localhost) by stout.americas.sgi.com (8.14.4/8.14.4/Submit) id oBAHtYP6017575; Fri, 10 Dec 2010 11:55:34 -0600 From: Alex Elder Message-Id: <201012101755.oBAHtYP6017575@stout.americas.sgi.com> Date: Fri, 10 Dec 2010 11:55:34 -0600 To: torvalds@linux-foundation.org Subject: [GIT PULL] XFS update for 2.6.37-rc6 Cc: linux-kernel@vger.kernel.org, xfs@oss.sgi.com, akpm@linux-foundation.org User-Agent: Heirloom mailx 12.5 7/5/10 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Linus, please pull the following change in for XFS. It fixes a regression that went into 2.6.37-rc1. Thanks. -Alex The following changes since commit 6313e3c21743cc88bb5bd8aa72948ee1e83937b6: Merge branches 'x86-fixes-for-linus', 'perf-fixes-for-linus' and... are available in the git repository at: git://oss.sgi.com/xfs/xfs for-linus Christoph Hellwig (1): xfs: log timestamp changes to the source inode in rename fs/xfs/xfs_rename.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) From birikimhaber@gmail.com Sat Dec 11 00:50:32 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: **** X-Spam-Status: No, score=4.3 required=5.0 tests=BAYES_99,FREEMAIL_FROM, MIME_8BIT_HEADER autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBB6oWUi141126 for ; Sat, 11 Dec 2010 00:50:32 -0600 X-ASG-Debug-ID: 1292050340-77af032c0000-w1Z2WR X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from server.netprox.tk (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9D9001CB2FAE for ; 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Sat, 11 Dec 2010 19:22:16 -0800 (PST) From: Linus Torvalds Date: Sat, 11 Dec 2010 19:22:16 -0800 Message-ID: X-ASG-Orig-Subj: Re: [GIT PULL] Please pull xyzzy fixes Subject: Re: [GIT PULL] Please pull xyzzy fixes To: Trond Myklebust , Len Brown , Liam Girdwood , Mark Brown , Alex Elder , Tejun Heo , Hitoshi Mitake , Sage Weil , Takashi Iwai , Borislav Petkov , Steve French Cc: linux-kernel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-pm@lists.linux-foundation.org, xfs@oss.sgi.com, ceph-devel@vger.kernel.org, linux-cifs@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 X-MIMEDefang-Filter: lf$Revision: 1.188 $ X-Scanned-By: MIMEDefang 2.63 on 140.211.169.13 X-Barracuda-Connect: smtp1.linux-foundation.org[140.211.169.13] X-Barracuda-Start-Time: 1292124164 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49173 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, Dec 10, 2010 at 10:05 AM, Trond Myklebust wrote: > Resending pull request after appending Chuck's fix for the nfs_umount() panic. [ .. and other people have other similar pull requests - acpi, ceph, cifs, xfs etc ] Right now I'm traveling without access to my laptop to actually do pulls. That was unintentional, but my laptop got co-opted for more important stuff (child needed it for school an my other laptop has a broken harddisk), so I've just been reading email with my cellphone. That allows me to keep up-to-date and mark the stuff that I'm scheduling for pulling, but I end up not replying a lot because typing is so painful and it does that silly html email thing. Anyway, this is just a reply to say that I've not lost your emails, I'm just effectively partly offline until Monday. I just stole Dirk's laptop just to write a reply-to-all (or at least a "reply-to-most"). Linus From loan@mail.penghu.gov.tw Sun Dec 12 00:38:44 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: **** X-Spam-Status: No, score=4.1 required=5.0 tests=BAYES_99,J_CHICKENPOX_42 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBC6chue085560 for ; Sun, 12 Dec 2010 00:38:44 -0600 X-ASG-Debug-ID: 1292136031-46a4029a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mailsqr.penghu.gov.tw (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id F230F143DE16 for ; Sat, 11 Dec 2010 22:40:31 -0800 (PST) Received: from mailsqr.penghu.gov.tw (mailsqr.penghu.gov.tw [163.29.98.117]) by cuda.sgi.com with ESMTP id Ad9yxG5uTmnmcpYh for ; Sat, 11 Dec 2010 22:40:31 -0800 (PST) Received: from mail.penghu.gov.tw (mail.penghu.gov.tw [172.30.10.30]) by mailsqr.penghu.gov.tw with ESMTP id oBC5p5x1006426; Sun, 12 Dec 2010 13:51:27 +0800 (CST) (envelope-from loan@mail.penghu.gov.tw) Received: from mail.penghu.gov.tw (localhost.localdomain [127.0.0.1]) by mail.penghu.gov.tw (8.12.10/8.12.10) with ESMTP id oBC5jaQ6013240; Sun, 12 Dec 2010 13:45:37 +0800 From: "Standard Finance" Reply-To: n.standard.application@gamil.com X-ASG-Orig-Subj: Loan assistance @ 3% interest rate..... Subject: Loan assistance @ 3% interest rate..... Date: Sun, 12 Dec 2010 13:45:36 +0800 Message-Id: <20101212055056.M66569@mail.penghu.gov.tw> X-Mailer: Open WebMail 2.41 20041116 X-OriginatingIP: 41.190.2.3 (l2044551) MIME-Version: 1.0 Content-Type: text/plain; charset=big5 To: undisclosed-recipients:; X-MAIL: mailsqr.penghu.gov.tw oBC5p5x1006426 X-Barracuda-Connect: mailsqr.penghu.gov.tw[163.29.98.117] X-Barracuda-Start-Time: 1292136032 X-Barracuda-Bayes: INNOCENT GLOBAL 0.4720 1.0000 0.0000 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49187 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Welcome to the Standard Finance & Loan,we are cooperative financial institution that is owned and controlled by its members and operated for the purpose of promoting thrift, providing credit at reasonable rates, and providing other financial assistance such as loan at 3% interest rate for local and international borrowers. We provide all kinds of loan. If you are interested in securing a loan with us, please Email Us At: STANDARD FINANCE & LOAN PLC. E-mail: n.standard.application@gamil.com Standard finance house #40 Fourth Avenue Gillingham Kent ME7 2LS,United Kingdom. Regards Marketers ==================================================================== ¥»¶l¥ó¶È±ÂÅv­ìµo«H¤H«ü©w¤§¦¬«H¤H¾\Äý¡A«D¸g±ÂÅv½Ð¤ÅÂà±H¡C°²¨Ï±z¦b¥¼¸g±ÂÅvªº±¡§Î¤U¦¬¨ì¥»¶l¥ó¡A·Ð½Ð±z§iª¾­ìµo«H¤H¡A¨Ã½ÐºÉ¥i¯à±N¥»¶l¥ó©ó­Ó¤H¹q¸£»P¹q¤l¶l¥ó¦øªA¾¹¤¤§R°£¡C¥»¶l¥ó»P¼ê´ò¿¤¬F©²·~°ÈµLÃö¤§¤º®e¡A¤£±oµø¬°¥»©²ªº¥ß³õ©Î·N¨£¡CThe privileged information contained in this email is intended for use only by the addressee(s) as indicated by the original author of this email. If you are not the original addressee of this email, please kindly inform the original author and delete all copies of it from your computer and mail server. Any information in this email that does not relate to the official business of Penghu County Government shall be deemed as neither given nor endorsed by Penghu County Government. From loan@mail.penghu.gov.tw Sun Dec 12 00:39:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: **** X-Spam-Status: No, score=4.1 required=5.0 tests=BAYES_99,J_CHICKENPOX_42 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBC6d19U085589 for ; Sun, 12 Dec 2010 00:39:01 -0600 X-ASG-Debug-ID: 1292136050-01a801bf0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mailsqr.penghu.gov.tw (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CA5CE1E0BEF for ; Sat, 11 Dec 2010 22:40:50 -0800 (PST) Received: from mailsqr.penghu.gov.tw (mailsqr.penghu.gov.tw [163.29.98.117]) by cuda.sgi.com with ESMTP id 50mNJS1du54s2PI7 for ; Sat, 11 Dec 2010 22:40:50 -0800 (PST) Received: from mail.penghu.gov.tw (mail.penghu.gov.tw [172.30.10.30]) by mailsqr.penghu.gov.tw with ESMTP id oBC5p51k006425; Sun, 12 Dec 2010 13:51:27 +0800 (CST) (envelope-from loan@mail.penghu.gov.tw) Received: from mail.penghu.gov.tw (localhost.localdomain [127.0.0.1]) by mail.penghu.gov.tw (8.12.10/8.12.10) with ESMTP id oBC5kxQ6013300; Sun, 12 Dec 2010 13:46:59 +0800 From: "Standard Finance" Reply-To: n.standard.application@gamil.com X-ASG-Orig-Subj: Loan assistance @ 3% interest rate..... Subject: Loan assistance @ 3% interest rate..... Date: Sun, 12 Dec 2010 13:46:59 +0800 Message-Id: <20101212055055.M86247@mail.penghu.gov.tw> X-Mailer: Open WebMail 2.41 20041116 X-OriginatingIP: 41.190.2.3 (l2044551) MIME-Version: 1.0 Content-Type: text/plain; charset=big5 To: undisclosed-recipients:; X-MAIL: mailsqr.penghu.gov.tw oBC5p51k006425 X-Barracuda-Connect: mailsqr.penghu.gov.tw[163.29.98.117] X-Barracuda-Start-Time: 1292136051 X-Barracuda-Bayes: INNOCENT GLOBAL 0.4394 1.0000 0.0000 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49186 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Welcome to the Standard Finance & Loan,we are cooperative financial institution that is owned and controlled by its members and operated for the purpose of promoting thrift, providing credit at reasonable rates, and providing other financial assistance such as loan at 3% interest rate for local and international borrowers. We provide all kinds of loan. If you are interested in securing a loan with us, please Email Us At: STANDARD FINANCE & LOAN PLC. E-mail: n.standard.application@gamil.com Standard finance house #40 Fourth Avenue Gillingham Kent ME7 2LS,United Kingdom. Regards Marketers ==================================================================== ¥»¶l¥ó¶È±ÂÅv­ìµo«H¤H«ü©w¤§¦¬«H¤H¾\Äý¡A«D¸g±ÂÅv½Ð¤ÅÂà±H¡C°²¨Ï±z¦b¥¼¸g±ÂÅvªº±¡§Î¤U¦¬¨ì¥»¶l¥ó¡A·Ð½Ð±z§iª¾­ìµo«H¤H¡A¨Ã½ÐºÉ¥i¯à±N¥»¶l¥ó©ó­Ó¤H¹q¸£»P¹q¤l¶l¥ó¦øªA¾¹¤¤§R°£¡C¥»¶l¥ó»P¼ê´ò¿¤¬F©²·~°ÈµLÃö¤§¤º®e¡A¤£±oµø¬°¥»©²ªº¥ß³õ©Î·N¨£¡CThe privileged information contained in this email is intended for use only by the addressee(s) as indicated by the original author of this email. If you are not the original addressee of this email, please kindly inform the original author and delete all copies of it from your computer and mail server. Any information in this email that does not relate to the official business of Penghu County Government shall be deemed as neither given nor endorsed by Penghu County Government. From loan@mail.penghu.gov.tw Sun Dec 12 00:40:05 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: **** X-Spam-Status: No, score=4.1 required=5.0 tests=BAYES_99,J_CHICKENPOX_42 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBC6e4tF085652 for ; Sun, 12 Dec 2010 00:40:05 -0600 X-ASG-Debug-ID: 1292136113-0235005b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mailsqr.penghu.gov.tw (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 08A4C1CB97AA for ; Sat, 11 Dec 2010 22:41:54 -0800 (PST) Received: from mailsqr.penghu.gov.tw (mailsqr.penghu.gov.tw [163.29.98.117]) by cuda.sgi.com with ESMTP id OAqO6ETOlb7xYM8d for ; Sat, 11 Dec 2010 22:41:54 -0800 (PST) Received: from mail.penghu.gov.tw (mail.penghu.gov.tw [172.30.10.30]) by mailsqr.penghu.gov.tw with ESMTP id oBC5pNRO006529; Sun, 12 Dec 2010 13:51:34 +0800 (CST) (envelope-from loan@mail.penghu.gov.tw) Received: from mail.penghu.gov.tw (localhost.localdomain [127.0.0.1]) by mail.penghu.gov.tw (8.12.10/8.12.10) with ESMTP id oBC5mJQ6013357; Sun, 12 Dec 2010 13:48:19 +0800 From: "Standard Finance" Reply-To: n.standard.application@gamil.com X-ASG-Orig-Subj: Loan assistance @ 3% interest rate..... Subject: Loan assistance @ 3% interest rate..... Date: Sun, 12 Dec 2010 13:48:19 +0800 Message-Id: <20101212055121.M97424@mail.penghu.gov.tw> X-Mailer: Open WebMail 2.41 20041116 X-OriginatingIP: 41.190.2.3 (l2044551) MIME-Version: 1.0 Content-Type: text/plain; charset=big5 To: undisclosed-recipients:; X-MAIL: mailsqr.penghu.gov.tw oBC5pNRO006529 X-Barracuda-Connect: mailsqr.penghu.gov.tw[163.29.98.117] X-Barracuda-Start-Time: 1292136115 X-Barracuda-Bayes: INNOCENT GLOBAL 0.5120 1.0000 0.7500 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: 0.75 X-Barracuda-Spam-Status: No, SCORE=0.75 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49186 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Welcome to the Standard Finance & Loan,we are cooperative financial institution that is owned and controlled by its members and operated for the purpose of promoting thrift, providing credit at reasonable rates, and providing other financial assistance such as loan at 3% interest rate for local and international borrowers. We provide all kinds of loan. If you are interested in securing a loan with us, please Email Us At: STANDARD FINANCE & LOAN PLC. E-mail: n.standard.application@gamil.com Standard finance house #40 Fourth Avenue Gillingham Kent ME7 2LS,United Kingdom. Regards Marketers ==================================================================== ¥»¶l¥ó¶È±ÂÅv­ìµo«H¤H«ü©w¤§¦¬«H¤H¾\Äý¡A«D¸g±ÂÅv½Ð¤ÅÂà±H¡C°²¨Ï±z¦b¥¼¸g±ÂÅvªº±¡§Î¤U¦¬¨ì¥»¶l¥ó¡A·Ð½Ð±z§iª¾­ìµo«H¤H¡A¨Ã½ÐºÉ¥i¯à±N¥»¶l¥ó©ó­Ó¤H¹q¸£»P¹q¤l¶l¥ó¦øªA¾¹¤¤§R°£¡C¥»¶l¥ó»P¼ê´ò¿¤¬F©²·~°ÈµLÃö¤§¤º®e¡A¤£±oµø¬°¥»©²ªº¥ß³õ©Î·N¨£¡CThe privileged information contained in this email is intended for use only by the addressee(s) as indicated by the original author of this email. If you are not the original addressee of this email, please kindly inform the original author and delete all copies of it from your computer and mail server. 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From SRS0+oHgL+16+fromorbit.com=david@internode.on.net Sun Dec 12 18:29:08 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_32, J_CHICKENPOX_33 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD0T7sc145354 for ; Sun, 12 Dec 2010 18:29:08 -0600 X-ASG-Debug-ID: 1292200256-767e01740000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7E8251E2F6B for ; Sun, 12 Dec 2010 16:30:57 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id VG2V59UFGmEOflWE for ; Sun, 12 Dec 2010 16:30:57 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49411567-1927428 for multiple; Mon, 13 Dec 2010 11:00:55 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PRwJP-0001el-Fl; Mon, 13 Dec 2010 11:30:43 +1100 Date: Mon, 13 Dec 2010 11:30:43 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Subject: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Message-ID: <20101213003043.GC9925@dastard> References: <1291341315-31338-1-git-send-email-david@fromorbit.com> <20101203043846.GB23339@dastard> <20101210132935.GA24210@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101210132935.GA24210@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail18.adl2.internode.on.net[150.101.137.103] X-Barracuda-Start-Time: 1292200258 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49257 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, Dec 10, 2010 at 08:29:35AM -0500, Christoph Hellwig wrote: > On Fri, Dec 03, 2010 at 03:38:46PM +1100, Dave Chinner wrote: > > FWIW, while these macros are the best way to make a simple backport > > is possible, I just discovered that mainline has a %pV format > > operator that allows an implementation like: > > > > void > > xfs_fs_cmn_err( > > const char *lvl, > > struct xfs_mount *mp, > > const char *fmt, > > ...) > > { > > struct va_format vaf; > > va_list args; > > > > va_start(args, fmt); > > vaf.fmt = fmt; > > vaf.va = &args; > > > > printk("%sFilesystem %s: %pV", lvl, mp->m_fsname, &vaf); > > va_end(args); > > > > BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); > > } > > With this we can also keep the existing integer-based CE_ values > and do trivial array lookup. That also avoids having to do a strcmp for > every message printed. Very true. Ok, so how do we want to process for this? I'm happy to drop the macro-ised patch and only use it as a backportable fix for old kernels - mainline appears to have a lot more functionality in this area than even recent distro kernels. Lachlan - is that an acceptable approach for you? It seems to me that the above is a much better way to start cleaning up the mainline code base, in the following way: 1. the above patch to remove the local message buffer + lock. 2. rationalise all the differences in error reporting down to a common interface 3. convert the common interface to use kernel log levels directly. The current trend seems to be to move towards logging interfaces with the following template: {sub_sys}_pr_{level}(priv, fmt, ...) Which in this case would give us: xfs_pr_debug(struct xfs_mount *mp, char *fmt, ...); xfs_pr_note(struct xfs_mount *mp, char *fmt, ...); .... xfs_pr_alert(struct xfs_mount *mp, char *fmt, ...); xfs_pr_emergency(struct xfs_mount *mp, char *fmt, ...); And a variant for the panic mask tagged version of xfs_pr_alert() of: xfs_pr_alert_tag(struct xfs_mount *mp, int tag, char *fmt, ...); I can't see any particular reason for needing to keep the separate parameter for the log level, nor for keeping all the different logging variants we currently have. I'm open to other ideas on the best way to rationalise all the logging we currently have - the above is just my current thoughts on what to do. I'm pushing this out as a proposal for discussion before I change anything as I don't relish the idea of iterating different logging APIs through patches... Cheers, Dave. > > -- Dave Chinner david@fromorbit.com From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 19:07:06 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD176iH147279 for ; Sun, 12 Dec 2010 19:07:06 -0600 X-ASG-Debug-ID: 1292202535-0be801180000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 779CB1CBBA1F for ; Sun, 12 Dec 2010 17:08:56 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id EDwvCXBel6y2BiFB for ; Sun, 12 Dec 2010 17:08:56 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 38232230-1927428 for ; Mon, 13 Dec 2010 11:38:54 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PRwuA-0001jO-UG for xfs@oss.sgi.com; Mon, 13 Dec 2010 12:08:42 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PRwsh-0003zc-Iy for xfs@oss.sgi.com; Mon, 13 Dec 2010 12:07:11 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: =?UTF-8?q?=5BPATCH=5D=20xfs=3A=20provide=20a=20inode=20iolock=20lockdep=20class?= Subject: =?UTF-8?q?=5BPATCH=5D=20xfs=3A=20provide=20a=20inode=20iolock=20lockdep=20class?= Date: Mon, 13 Dec 2010 12:07:11 +1100 Message-Id: <1292202431-15320-1-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292202537 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE_7582B X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49259 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE_7582B Custom Rule 7582B X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The XFS iolock needs to be re-initialised to a new lock class before it enters reclaim to prevent lockdep false positives. Unfortunately, this is not sufficient protection as inodes in the XFS_IRECLAIMABLE state can be recycled and not re-initialised before being reused. We need to re-initialise the lock state when transfering out of XFS_IRECLAIMABLE state to XFS_INEW, but we need to keep the same class as if the inode was just allocated. Hence we need a specific lockdep class variable for the iolock so that both initialisations use the same class. While there, add a specific class for inodes in the reclaim state so that it is easy to tell from lockdep reports what state the inode was in that generated the report. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_super.c | 2 ++ fs/xfs/xfs_iget.c | 19 +++++++++++++++++++ fs/xfs/xfs_inode.h | 2 ++ 3 files changed, 23 insertions(+), 0 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index 064f964..c45b323 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -1118,6 +1118,8 @@ xfs_fs_evict_inode( */ ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); + lockdep_set_class_and_name(&ip->i_iolock.mr_lock, + &xfs_iolock_reclaimable, "xfs_iolock_reclaimable"); xfs_inactive(ip); } diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index 0cdd269..cdb1c25 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -43,6 +43,17 @@ /* + * Define xfs inode iolock lockdep classes. We need to ensure that all active + * inodes are considered the same for lockdep purposes, including inodes that + * are recycled through the XFS_IRECLAIMABLE state. This is the the only way to + * guarantee the locks are considered the same when there are multiple lock + * initialisation siteÑ•. Also, define a reclaimable inode class so it is + * obvious in lockdep reports which class the report is against. + */ +static struct lock_class_key xfs_iolock_active; +struct lock_class_key xfs_iolock_reclaimable; + +/* * Allocate and initialise an xfs_inode. */ STATIC struct xfs_inode * @@ -71,6 +82,8 @@ xfs_inode_alloc( ASSERT(completion_done(&ip->i_flush)); mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); + lockdep_set_class_and_name(&ip->i_iolock.mr_lock, + &xfs_iolock_active, "xfs_iolock_active"); /* initialise the xfs inode */ ip->i_ino = ino; @@ -218,6 +231,12 @@ xfs_iget_cache_hit( ip->i_flags |= XFS_INEW; __xfs_inode_clear_reclaim_tag(mp, pag, ip); inode->i_state = I_NEW; + + ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); + mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); + lockdep_set_class_and_name(&ip->i_iolock.mr_lock, + &xfs_iolock_active, "xfs_iolock_active"); + spin_unlock(&ip->i_flags_lock); write_unlock(&pag->pag_ici_lock); } else { diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index fb2ca2e..1c6514d 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -438,6 +438,8 @@ static inline void xfs_ifunlock(xfs_inode_t *ip) #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT) #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT) +extern struct lock_class_key xfs_iolock_reclaimable; + /* * Flags for xfs_itruncate_start(). */ -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 19:21:53 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD1LrIn147865 for ; Sun, 12 Dec 2010 19:21:53 -0600 X-ASG-Debug-ID: 1292203422-2268011b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A078D1E29A4 for ; Sun, 12 Dec 2010 17:23:43 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id oZPiz5LLQfgT719x for ; Sun, 12 Dec 2010 17:23:43 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 38234065-1927428 for ; Mon, 13 Dec 2010 11:53:42 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PRx8T-0001kt-Kh; Mon, 13 Dec 2010 12:23:29 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PRx70-00043s-58; Mon, 13 Dec 2010 12:21:58 +1100 From: Dave Chinner To: xfs@oss.sgi.com Cc: linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl X-ASG-Orig-Subj: =?UTF-8?q?=5BPATCH=201/3=5D=20lib=3A=20percpu=20counter=20add=20unless=20less=20than=20functionality?= Subject: =?UTF-8?q?=5BPATCH=201/3=5D=20lib=3A=20percpu=20counter=20add=20unless=20less=20than=20functionality?= Date: Mon, 13 Dec 2010 12:21:51 +1100 Message-Id: <1292203313-15570-2-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292203313-15570-1-git-send-email-david@fromorbit.com> References: <1292203313-15570-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292203424 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49261 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner To use the generic percpu counter infrastructure for counters that require conditional addition based on a threshold value we need special handling of the counter. Further, the caller needs to know the status of the conditional addition to determine what action to take depending on whether the addition occurred or not. Examples of this sort of usage are resource counters that cannot go below zero (e.g. filesystem free blocks). To allow XFS to replace it's complex roll-your-own per-cpu superblock counters, a single generic conditional function is required: percpu_counter_add_unless_lt(). This will add the amount to the counter unless the result would be less than the given threshold. A caller supplied threshold is required because XFS does not necessarily use the same threshold for every counter. percpu_counter_add_unless_lt() attempts to minimise counter lock traversals by only taking the counter lock when the threshold is within the error range of the current counter value. Hence when the threshold is not within the counter error range, the counter will still have the same scalability characteristics as the normal percpu_counter_add() function. Adding this functionality to the generic percpu counters allows us to remove the much more complex and less efficient XFS percpu counter code (~700 lines of code) and replace it with generic percpu counters. Signed-off-by: Dave Chinner --- include/linux/percpu_counter.h | 27 ++++++++++++++ lib/percpu_counter.c | 79 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 106 insertions(+), 0 deletions(-) diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h index 46f6ba5..ad18779 100644 --- a/include/linux/percpu_counter.h +++ b/include/linux/percpu_counter.h @@ -41,12 +41,21 @@ void percpu_counter_set(struct percpu_counter *fbc, s64 amount); void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch); s64 __percpu_counter_sum(struct percpu_counter *fbc); int percpu_counter_compare(struct percpu_counter *fbc, s64 rhs); +int __percpu_counter_add_unless_lt(struct percpu_counter *fbc, s64 amount, + s64 threshold, s32 batch); static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount) { __percpu_counter_add(fbc, amount, percpu_counter_batch); } +static inline int percpu_counter_add_unless_lt(struct percpu_counter *fbc, + s64 amount, s64 threshold) +{ + return __percpu_counter_add_unless_lt(fbc, amount, threshold, + percpu_counter_batch); +} + static inline s64 percpu_counter_sum_positive(struct percpu_counter *fbc) { s64 ret = __percpu_counter_sum(fbc); @@ -153,6 +162,24 @@ static inline int percpu_counter_initialized(struct percpu_counter *fbc) return 1; } +static inline int percpu_counter_add_unless_lt(struct percpu_counter *fbc, s64 amount, + s64 threshold) +{ + s64 count; + int ret = â€1; + + preempt_disable(); + count = fbc->count + amount; + if (count < threshold) + goto out; + fbc->count = count; + ret = count == threshold ? 0 : 1; +out: + preempt_enable(); + return ret; +} + + #endif /* CONFIG_SMP */ static inline void percpu_counter_inc(struct percpu_counter *fbc) diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c index 604678d..eacccb7 100644 --- a/lib/percpu_counter.c +++ b/lib/percpu_counter.c @@ -213,6 +213,85 @@ int percpu_counter_compare(struct percpu_counter *fbc, s64 rhs) } EXPORT_SYMBOL(percpu_counter_compare); +/** + * __percpu_counter_add_unless_lt - add to a counter avoiding underruns + * @fbc: counter + * @amount: amount to add + * @threshold: underrun threshold + * @batch: percpu counter batch size. + * + * Add @amount to @fdc if and only if result of addition is greater than or + * equal to @threshold Return 1 if greater and added, 0 if equal and added + * and -1 if and underrun would have occured. + * + * This is useful for operations that must accurately and atomically only add a + * delta to a counter if the result is greater than a given (e.g. for freespace + * accounting with ENOSPC checking in filesystems). + */ +int __percpu_counter_add_unless_lt(struct percpu_counter *fbc, s64 amount, + s64 threshold, s32 batch) +{ + s64 count; + s64 error = 2 * batch * num_online_cpus(); + int cpu; + int ret = -1; + + preempt_disable(); + + /* Check to see if rough count will be sufficient for comparison */ + count = percpu_counter_read(fbc); + if (count + amount < threshold - error) + goto out; + + /* + * If the counter is over the threshold and the change is less than the + * batch size, we might be able to avoid locking. + */ + if (count > threshold + error && abs(amount) < batch) { + __percpu_counter_add(fbc, amount, batch); + ret = 1; + goto out; + } + + /* + * If the result is over the error threshold, we can just add it + * into the global counter ignoring what is in the per-cpu counters + * as they will not change the result of the calculation. + */ + spin_lock(&fbc->lock); + if (fbc->count + amount > threshold + error) { + fbc->count += amount; + ret = 1; + goto out_unlock; + } + + /* + * Result is withing the error margin. Run an open-coded sum of the + * per-cpu counters to get the exact value at this point in time, + * and if the result greater than the threshold, add the amount to + * the global counter. + */ + count = fbc->count; + for_each_online_cpu(cpu) { + s32 *pcount = per_cpu_ptr(fbc->counters, cpu); + count += *pcount; + } + WARN_ON(count < threshold); + + if (count + amount >= threshold) { + ret = 0; + if (count + amount > threshold) + ret = 1; + fbc->count += amount; + } +out_unlock: + spin_unlock(&fbc->lock); +out: + preempt_enable(); + return ret; +} +EXPORT_SYMBOL(percpu_counter_add_unless_lt); + static int __init percpu_counter_startup(void) { compute_batch_value(); -- 1.7.2.3 From SRS0+w8Wj+16+fromorbit.com=dave@internode.on.net Sun Dec 12 19:21:58 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD1LvNv147874 for ; Sun, 12 Dec 2010 19:21:57 -0600 X-ASG-Debug-ID: 1292203427-0be901b00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3B0481CBC2F5 for ; Sun, 12 Dec 2010 17:23:48 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id g3kgvHDXRNQCwYvA for ; Sun, 12 Dec 2010 17:23:48 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 4410429-1927428 for multiple; Mon, 13 Dec 2010 11:53:41 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PRx8T-0001ks-J3; Mon, 13 Dec 2010 12:23:29 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PRx70-00043q-3O; Mon, 13 Dec 2010 12:21:58 +1100 From: Dave Chinner To: xfs@oss.sgi.com Cc: linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl X-ASG-Orig-Subj: [PATCH 0/3] Use generic percpu counters in XFS V2 Subject: [PATCH 0/3] Use generic percpu counters in XFS V2 Date: Mon, 13 Dec 2010 12:21:50 +1100 Message-Id: <1292203313-15570-1-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292203429 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.42 X-Barracuda-Spam-Status: No, SCORE=-1.42 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MARKETING_SUBJECT X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49261 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.60 MARKETING_SUBJECT Subject contains popular marketing words X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This series replaces the XFS per-cpu superblock counters with generic per-cpu counters. It adds a specialised operation to the generic counter implementation and then switches the XFS percpu superblock counters over to use the generic percpu counter implementation. The result is several hundred lines of complex code removed from XFS. Version 2: - use wrappers for percpu_counter_add_unless_lt() to allow custom batch sizes to be used. - removed xfs_icsb_*() wrappers from percpu counters. - cleaned up split of xfs_icsb_modify_counters(). From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 19:22:06 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,J_CHICKENPOX_64, J_CHICKENPOX_65,J_CHICKENPOX_66 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD1M6q8147909 for ; Sun, 12 Dec 2010 19:22:06 -0600 X-ASG-Debug-ID: 1292203434-76f602770000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 351F61CBC306 for ; Sun, 12 Dec 2010 17:23:55 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id EI792UySx7YgzkYl for ; Sun, 12 Dec 2010 17:23:55 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 38234066-1927428 for multiple; Mon, 13 Dec 2010 11:53:43 +1030 (CDT) Received: from [192.168.1.1] (helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PRx8d-0001kw-M9; Mon, 13 Dec 2010 12:23:39 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PRx70-00043w-8o; Mon, 13 Dec 2010 12:21:58 +1100 From: Dave Chinner To: xfs@oss.sgi.com Cc: linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl X-ASG-Orig-Subj: [PATCH 3/3] xfs: demultiplex xfs_icsb_modify_counters() Subject: [PATCH 3/3] xfs: demultiplex xfs_icsb_modify_counters() Date: Mon, 13 Dec 2010 12:21:53 +1100 Message-Id: <1292203313-15570-4-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292203313-15570-1-git-send-email-david@fromorbit.com> References: <1292203313-15570-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292203437 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49261 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner With the conversion to percpu counters, xfs_icsb_modify_counters() really does not need to exist. Convert the inode counter modifications to use a common helper function for the one place that calls them, and add another function for the free block modification and convert all the callers to use that. Signed-off-by: Dave Chinner --- fs/xfs/xfs_bmap.c | 34 +++++------- fs/xfs/xfs_fsops.c | 3 +- fs/xfs/xfs_mount.c | 160 ++++++++++++++++++++++++--------------------------- fs/xfs/xfs_mount.h | 5 +- fs/xfs/xfs_trans.c | 23 +++---- 5 files changed, 102 insertions(+), 123 deletions(-) diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index 4111cd3..6a47556 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -614,8 +614,8 @@ xfs_bmap_add_extent( nblks += cur->bc_private.b.allocated; ASSERT(nblks <= da_old); if (nblks < da_old) - xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS, - (int64_t)(da_old - nblks), rsvd); + xfs_icsb_modify_free_blocks(ip->i_mount, + (int64_t)(da_old - nblks), rsvd); } /* * Clear out the allocated field, done with it now in any case. @@ -1079,7 +1079,7 @@ xfs_bmap_add_extent_delay_real( diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) - (cur ? cur->bc_private.b.allocated : 0)); if (diff > 0 && - xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS, + xfs_icsb_modify_free_blocks(ip->i_mount, -((int64_t)diff), rsvd)) { /* * Ick gross gag me with a spoon. @@ -1090,8 +1090,7 @@ xfs_bmap_add_extent_delay_real( temp--; diff--; if (!diff || - !xfs_icsb_modify_counters(ip->i_mount, - XFS_SBS_FDBLOCKS, + !xfs_icsb_modify_free_blocks(ip->i_mount, -((int64_t)diff), rsvd)) break; } @@ -1099,8 +1098,7 @@ xfs_bmap_add_extent_delay_real( temp2--; diff--; if (!diff || - !xfs_icsb_modify_counters(ip->i_mount, - XFS_SBS_FDBLOCKS, + !xfs_icsb_modify_free_blocks(ip->i_mount, -((int64_t)diff), rsvd)) break; } @@ -1769,8 +1767,8 @@ xfs_bmap_add_extent_hole_delay( } if (oldlen != newlen) { ASSERT(oldlen > newlen); - xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS, - (int64_t)(oldlen - newlen), rsvd); + xfs_icsb_modify_free_blocks(ip->i_mount, + (int64_t)(oldlen - newlen), rsvd); /* * Nothing to do for disk quota accounting here. */ @@ -3114,10 +3112,9 @@ xfs_bmap_del_extent( * Nothing to do for disk quota accounting here. */ ASSERT(da_old >= da_new); - if (da_old > da_new) { - xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, - (int64_t)(da_old - da_new), rsvd); - } + if (da_old > da_new) + xfs_icsb_modify_free_blocks(ip->i_mount, + (int64_t)(da_old - da_new), rsvd); done: *logflagsp = flags; return error; @@ -4530,14 +4527,12 @@ xfs_bmapi( -((int64_t)extsz), (flags & XFS_BMAPI_RSVBLOCKS)); } else { - error = xfs_icsb_modify_counters(mp, - XFS_SBS_FDBLOCKS, + error = xfs_icsb_modify_free_blocks(mp, -((int64_t)alen), (flags & XFS_BMAPI_RSVBLOCKS)); } if (!error) { - error = xfs_icsb_modify_counters(mp, - XFS_SBS_FDBLOCKS, + error = xfs_icsb_modify_free_blocks(mp, -((int64_t)indlen), (flags & XFS_BMAPI_RSVBLOCKS)); if (error && rt) @@ -4546,8 +4541,7 @@ xfs_bmapi( (int64_t)extsz, (flags & XFS_BMAPI_RSVBLOCKS)); else if (error) - xfs_icsb_modify_counters(mp, - XFS_SBS_FDBLOCKS, + xfs_icsb_modify_free_blocks(mp, (int64_t)alen, (flags & XFS_BMAPI_RSVBLOCKS)); } @@ -5210,7 +5204,7 @@ xfs_bunmapi( ip, -((long)del.br_blockcount), 0, XFS_QMOPT_RES_RTBLKS); } else { - xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, + xfs_icsb_modify_free_blocks(mp, (int64_t)del.br_blockcount, rsvd); (void)xfs_trans_reserve_quota_nblks(NULL, ip, -((long)del.br_blockcount), 0, diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index fb9a9c8..be34ff2 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -596,8 +596,7 @@ out: * the extra reserve blocks from the reserve..... */ int error; - error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, - fdblks_delta, 0); + error = xfs_icsb_modify_free_blocks(mp, fdblks_delta, 0); if (error == ENOSPC) goto retry; } diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 16be1b1..5e41ef3 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -332,6 +332,80 @@ xfs_icsb_sync_counters( percpu_counter_sum_positive(&mp->m_icsb[XFS_ICSB_FDBLOCKS]); } +int +xfs_icsb_modify_inodes( + struct xfs_mount *mp, + int cntr, + int64_t delta) +{ + int ret; + + ASSERT(cntr == XFS_ICSB_ICOUNT || cntr == XFS_ICSB_IFREE); + + ret = percpu_counter_add_unless_lt(&mp->m_icsb[cntr], + delta, 0); + if (likely(ret >= 0)) + return 0; + return ret; +} + +int +xfs_icsb_modify_free_blocks( + struct xfs_mount *mp, + int64_t delta, + int rsvd) +{ + int64_t lcounter; + int64_t res_used; + int ret; + + /* + * if we are putting blocks back, put them into the reserve + * block pool first. + */ + if (unlikely(mp->m_resblks != mp->m_resblks_avail) && delta > 0) { + spin_lock(&mp->m_sb_lock); + res_used = (int64_t)(mp->m_resblks - + mp->m_resblks_avail); + if (res_used > delta) { + mp->m_resblks_avail += delta; + delta = 0; + } else { + delta -= res_used; + mp->m_resblks_avail = mp->m_resblks; + } + spin_unlock(&mp->m_sb_lock); + if (!delta) + return 0; + } + + /* try the change */ + ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_ICSB_FDBLOCKS], + delta, XFS_ALLOC_SET_ASIDE(mp)); + if (likely(ret >= 0)) + return 0; + + /* ENOSPC */ + ASSERT(delta < 0); + + if (!rsvd) + return XFS_ERROR(ENOSPC); + + spin_lock(&mp->m_sb_lock); + lcounter = (int64_t)mp->m_resblks_avail + delta; + if (lcounter >= 0) { + mp->m_resblks_avail = lcounter; + spin_unlock(&mp->m_sb_lock); + return 0; + } + spin_unlock(&mp->m_sb_lock); + printk_once(KERN_WARNING + "Filesystem \"%s\": reserve blocks depleted! " + "Consider increasing reserve pool size.", + mp->m_fsname); + return XFS_ERROR(ENOSPC); +} + /* * Check size of device based on the (data/realtime) block count. * Note: this check is used by the growfs code as well as mount. @@ -1857,7 +1931,7 @@ xfs_mod_incore_sb( * * Note that this function may not be used for the superblock values that * are tracked with the in-memory per-cpu counters - a direct call to - * xfs_icsb_modify_counters is required for these. + * xfs_icsb_modify_xxx is required for these. */ int xfs_mod_incore_sb_batch( @@ -1898,90 +1972,6 @@ unwind: return error; } -int -xfs_icsb_modify_counters( - xfs_mount_t *mp, - xfs_sb_field_t field, - int64_t delta, - int rsvd) -{ - int64_t lcounter; - int64_t res_used; - int ret = 0; - - - switch (field) { - case XFS_SBS_ICOUNT: - ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_SBS_ICOUNT], - delta, 0); - if (ret < 0) { - ASSERT(0); - return XFS_ERROR(EINVAL); - } - return 0; - - case XFS_SBS_IFREE: - ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_SBS_IFREE], - delta, 0); - if (ret < 0) { - ASSERT(0); - return XFS_ERROR(EINVAL); - } - return 0; - - case XFS_SBS_FDBLOCKS: - /* - * if we are putting blocks back, put them into the reserve - * block pool first. - */ - if (mp->m_resblks != mp->m_resblks_avail && delta > 0) { - spin_lock(&mp->m_sb_lock); - res_used = (int64_t)(mp->m_resblks - - mp->m_resblks_avail); - if (res_used > delta) { - mp->m_resblks_avail += delta; - delta = 0; - } else { - delta -= res_used; - mp->m_resblks_avail = mp->m_resblks; - } - spin_unlock(&mp->m_sb_lock); - if (!delta) - return 0; - } - - /* try the change */ - ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_ICSB_FDBLOCKS], - delta, XFS_ALLOC_SET_ASIDE(mp)); - if (likely(ret >= 0)) - return 0; - - /* ENOSPC */ - ASSERT(delta < 0); - - if (!rsvd) - return XFS_ERROR(ENOSPC); - - spin_lock(&mp->m_sb_lock); - lcounter = (int64_t)mp->m_resblks_avail + delta; - if (lcounter >= 0) { - mp->m_resblks_avail = lcounter; - spin_unlock(&mp->m_sb_lock); - return 0; - } - spin_unlock(&mp->m_sb_lock); - printk_once(KERN_WARNING - "Filesystem \"%s\": reserve blocks depleted! " - "Consider increasing reserve pool size.", - mp->m_fsname); - return XFS_ERROR(ENOSPC); - default: - ASSERT(0); - return XFS_ERROR(EINVAL); - } - return 0; -} - /* * xfs_getsb() is called to obtain the buffer for the superblock. * The buffer is returned locked and read in from disk. diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 42d31df..03ad25c6 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -75,9 +75,6 @@ enum { XFS_ICSB_MAX, }; -extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, - int64_t, int); - typedef struct xfs_mount { struct super_block *m_super; xfs_tid_t m_tid; /* next unused tid for fs */ @@ -333,6 +330,8 @@ extern int xfs_icsb_init_counters(struct xfs_mount *); extern void xfs_icsb_reinit_counters(struct xfs_mount *); extern void xfs_icsb_destroy_counters(struct xfs_mount *); extern void xfs_icsb_sync_counters(struct xfs_mount *); +extern int xfs_icsb_modify_inodes(struct xfs_mount *, int, int64_t); +extern int xfs_icsb_modify_free_blocks(struct xfs_mount *, int64_t, int); #endif /* __KERNEL__ */ diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index f6d956b..8139a2e 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -696,7 +696,7 @@ xfs_trans_reserve( * fail if the count would go below zero. */ if (blocks > 0) { - error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, + error = xfs_icsb_modify_free_blocks(tp->t_mountp, -((int64_t)blocks), rsvd); if (error != 0) { current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); @@ -767,8 +767,8 @@ undo_log: undo_blocks: if (blocks > 0) { - xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, - (int64_t)blocks, rsvd); + xfs_icsb_modify_free_blocks(tp->t_mountp, + (int64_t)blocks, rsvd); tp->t_blk_res = 0; } @@ -1045,22 +1045,19 @@ xfs_trans_unreserve_and_mod_sb( /* apply the per-cpu counters */ if (blkdelta) { - error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, - blkdelta, rsvd); + error = xfs_icsb_modify_free_blocks(mp, blkdelta, rsvd); if (error) goto out; } if (idelta) { - error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, - idelta, rsvd); + error = xfs_icsb_modify_inodes(mp, XFS_ICSB_ICOUNT, idelta); if (error) goto out_undo_fdblocks; } if (ifreedelta) { - error = xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, - ifreedelta, rsvd); + error = xfs_icsb_modify_inodes(mp, XFS_ICSB_IFREE, ifreedelta); if (error) goto out_undo_icount; } @@ -1129,15 +1126,15 @@ xfs_trans_unreserve_and_mod_sb( out_undo_ifreecount: if (ifreedelta) - xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd); + xfs_icsb_modify_inodes(mp, XFS_ICSB_IFREE, -ifreedelta); out_undo_icount: if (idelta) - xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd); + xfs_icsb_modify_inodes(mp, XFS_ICSB_ICOUNT, -idelta); out_undo_fdblocks: if (blkdelta) - xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd); + xfs_icsb_modify_free_blocks(mp, -blkdelta, rsvd); out: - ASSERT(error = 0); + ASSERT(error == 0); return; } -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 19:22:06 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.4 required=5.0 tests=BAYES_00,J_CHICKENPOX_33, J_CHICKENPOX_63,J_CHICKENPOX_64,J_CHICKENPOX_65,J_CHICKENPOX_72 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD1M5aW147904 for ; Sun, 12 Dec 2010 19:22:05 -0600 X-ASG-Debug-ID: 1292203432-5c1603070000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A6820143F7F1 for ; Sun, 12 Dec 2010 17:23:53 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id LKWPyQaEbqCQTpeM for ; Sun, 12 Dec 2010 17:23:52 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49618381-1927428 for ; Mon, 13 Dec 2010 11:53:51 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PRx8T-0001ku-Lv; Mon, 13 Dec 2010 12:23:29 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PRx70-00043u-6x; Mon, 13 Dec 2010 12:21:58 +1100 From: Dave Chinner To: xfs@oss.sgi.com Cc: linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl X-ASG-Orig-Subj: [PATCH 2/3] xfs: use generic per-cpu counter infrastructure Subject: [PATCH 2/3] xfs: use generic per-cpu counter infrastructure Date: Mon, 13 Dec 2010 12:21:52 +1100 Message-Id: <1292203313-15570-3-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292203313-15570-1-git-send-email-david@fromorbit.com> References: <1292203313-15570-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292203435 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.42 X-Barracuda-Spam-Status: No, SCORE=-1.42 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MARKETING_SUBJECT X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49260 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.60 MARKETING_SUBJECT Subject contains popular marketing words X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner XFS has a per-cpu counter implementation for in-core superblock counters that pre-dated the generic implementation. It is complex and baroque as it is tailored directly to the needs of ENOSPC detection. Now that the generic percpu counter infrastructure has the percpu_counter_add_unless_lt() function that implements the necessary threshold checks for us, switch the XFS per-cpu superblock counters to use the generic percpu counter infrastructure. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_linux.h | 9 - fs/xfs/linux-2.6/xfs_super.c | 4 +- fs/xfs/xfs_fsops.c | 4 +- fs/xfs/xfs_mount.c | 802 ++++++++---------------------------------- fs/xfs/xfs_mount.h | 71 +--- 5 files changed, 171 insertions(+), 719 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h index 214ddd7..9fa4f2a 100644 --- a/fs/xfs/linux-2.6/xfs_linux.h +++ b/fs/xfs/linux-2.6/xfs_linux.h @@ -88,15 +88,6 @@ #include #include -/* - * Feature macros (disable/enable) - */ -#ifdef CONFIG_SMP -#define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ -#else -#undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ -#endif - #define irix_sgid_inherit xfs_params.sgid_inherit.val #define irix_symlink_mode xfs_params.symlink_mode.val #define xfs_panic_mask xfs_params.panic_mask.val diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index c45b323..abcda07 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -1229,9 +1229,9 @@ xfs_fs_statfs( statp->f_fsid.val[0] = (u32)id; statp->f_fsid.val[1] = (u32)(id >> 32); - xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); - spin_lock(&mp->m_sb_lock); + xfs_icsb_sync_counters(mp); + statp->f_bsize = sbp->sb_blocksize; lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; statp->f_blocks = sbp->sb_dblocks - lsize; diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index a7c116e..fb9a9c8 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -478,8 +478,8 @@ xfs_fs_counts( xfs_mount_t *mp, xfs_fsop_counts_t *cnt) { - xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); spin_lock(&mp->m_sb_lock); + xfs_icsb_sync_counters(mp); cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); cnt->freertx = mp->m_sb.sb_frextents; cnt->freeino = mp->m_sb.sb_ifree; @@ -540,7 +540,7 @@ xfs_reserve_blocks( */ retry: spin_lock(&mp->m_sb_lock); - xfs_icsb_sync_counters_locked(mp, 0); + xfs_icsb_sync_counters(mp); /* * If our previous reservation was larger than the current value, diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 19e9dfa..16be1b1 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -46,19 +46,6 @@ STATIC void xfs_unmountfs_wait(xfs_mount_t *); - -#ifdef HAVE_PERCPU_SB -STATIC void xfs_icsb_balance_counter(xfs_mount_t *, xfs_sb_field_t, - int); -STATIC void xfs_icsb_balance_counter_locked(xfs_mount_t *, xfs_sb_field_t, - int); -STATIC void xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t); -#else - -#define xfs_icsb_balance_counter(mp, a, b) do { } while (0) -#define xfs_icsb_balance_counter_locked(mp, a, b) do { } while (0) -#endif - static const struct { short offset; short type; /* 0 = integer @@ -281,6 +268,71 @@ xfs_free_perag( } /* + * Per-cpu incore superblock counters + * + * This provides distributed per cpu counters for contended fields (e.g. free + * block count). Difficulties arise in that the incore sb is used for ENOSPC + * checking, and hence needs to be accurately read when we are running low on + * space. Hence We need to check against counter error bounds and determine how + * accurately to sum based on that metric. The percpu counters take care of + * this for us, so we only need to modify the fast path to handle per-cpu + * counter error cases. + */ +void +xfs_icsb_reinit_counters( + struct xfs_mount *mp) +{ + percpu_counter_set(&mp->m_icsb[XFS_ICSB_FDBLOCKS], + mp->m_sb.sb_fdblocks); + percpu_counter_set(&mp->m_icsb[XFS_ICSB_IFREE], mp->m_sb.sb_ifree); + percpu_counter_set(&mp->m_icsb[XFS_ICSB_ICOUNT], mp->m_sb.sb_icount); +} + +int +xfs_icsb_init_counters( + struct xfs_mount *mp) +{ + int i; + int error; + + for (i = 0; i < XFS_ICSB_MAX; i++) { + error = percpu_counter_init(&mp->m_icsb[i], 0); + if (error) + goto out_error; + } + xfs_icsb_reinit_counters(mp); + return 0; + +out_error: + for (; i >= 0; i--) + percpu_counter_destroy(&mp->m_icsb[i]); + return error; +} + +void +xfs_icsb_destroy_counters( + xfs_mount_t *mp) +{ + int i; + + for (i = 0; i < XFS_ICSB_MAX; i++) + percpu_counter_destroy(&mp->m_icsb[i]); +} + +void +xfs_icsb_sync_counters( + xfs_mount_t *mp) +{ + assert_spin_locked(&mp->m_sb_lock); + mp->m_sb.sb_icount = + percpu_counter_sum_positive(&mp->m_icsb[XFS_ICSB_ICOUNT]); + mp->m_sb.sb_ifree = + percpu_counter_sum_positive(&mp->m_icsb[XFS_ICSB_IFREE]); + mp->m_sb.sb_fdblocks = + percpu_counter_sum_positive(&mp->m_icsb[XFS_ICSB_FDBLOCKS]); +} + +/* * Check size of device based on the (data/realtime) block count. * Note: this check is used by the growfs code as well as mount. */ @@ -1562,7 +1614,9 @@ xfs_log_sbcount( if (!xfs_fs_writable(mp)) return 0; - xfs_icsb_sync_counters(mp, 0); + spin_lock(&mp->m_sb_lock); + xfs_icsb_sync_counters(mp); + spin_unlock(&mp->m_sb_lock); /* * we don't need to do this if we are updating the superblock @@ -1674,9 +1728,8 @@ xfs_mod_incore_sb_unlocked( int64_t delta, int rsvd) { - int scounter; /* short counter for 32 bit fields */ - long long lcounter; /* long counter for 64 bit fields */ - long long res_used, rem; + int scounter = 0; /* short counter for 32 bit fields */ + long long lcounter = 0; /* long counter for 64 bit fields */ /* * With the in-core superblock spin lock held, switch @@ -1685,66 +1738,6 @@ xfs_mod_incore_sb_unlocked( * 0, then do not apply the delta and return EINVAL. */ switch (field) { - case XFS_SBS_ICOUNT: - lcounter = (long long)mp->m_sb.sb_icount; - lcounter += delta; - if (lcounter < 0) { - ASSERT(0); - return XFS_ERROR(EINVAL); - } - mp->m_sb.sb_icount = lcounter; - return 0; - case XFS_SBS_IFREE: - lcounter = (long long)mp->m_sb.sb_ifree; - lcounter += delta; - if (lcounter < 0) { - ASSERT(0); - return XFS_ERROR(EINVAL); - } - mp->m_sb.sb_ifree = lcounter; - return 0; - case XFS_SBS_FDBLOCKS: - lcounter = (long long) - mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); - res_used = (long long)(mp->m_resblks - mp->m_resblks_avail); - - if (delta > 0) { /* Putting blocks back */ - if (res_used > delta) { - mp->m_resblks_avail += delta; - } else { - rem = delta - res_used; - mp->m_resblks_avail = mp->m_resblks; - lcounter += rem; - } - } else { /* Taking blocks away */ - lcounter += delta; - if (lcounter >= 0) { - mp->m_sb.sb_fdblocks = lcounter + - XFS_ALLOC_SET_ASIDE(mp); - return 0; - } - - /* - * We are out of blocks, use any available reserved - * blocks if were allowed to. - */ - if (!rsvd) - return XFS_ERROR(ENOSPC); - - lcounter = (long long)mp->m_resblks_avail + delta; - if (lcounter >= 0) { - mp->m_resblks_avail = lcounter; - return 0; - } - printk_once(KERN_WARNING - "Filesystem \"%s\": reserve blocks depleted! " - "Consider increasing reserve pool size.", - mp->m_fsname); - return XFS_ERROR(ENOSPC); - } - - mp->m_sb.sb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp); - return 0; case XFS_SBS_FREXTENTS: lcounter = (long long)mp->m_sb.sb_frextents; lcounter += delta; @@ -1846,9 +1839,7 @@ xfs_mod_incore_sb( { int status; -#ifdef HAVE_PERCPU_SB ASSERT(field < XFS_SBS_ICOUNT || field > XFS_SBS_FDBLOCKS); -#endif spin_lock(&mp->m_sb_lock); status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd); spin_unlock(&mp->m_sb_lock); @@ -1907,6 +1898,90 @@ unwind: return error; } +int +xfs_icsb_modify_counters( + xfs_mount_t *mp, + xfs_sb_field_t field, + int64_t delta, + int rsvd) +{ + int64_t lcounter; + int64_t res_used; + int ret = 0; + + + switch (field) { + case XFS_SBS_ICOUNT: + ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_SBS_ICOUNT], + delta, 0); + if (ret < 0) { + ASSERT(0); + return XFS_ERROR(EINVAL); + } + return 0; + + case XFS_SBS_IFREE: + ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_SBS_IFREE], + delta, 0); + if (ret < 0) { + ASSERT(0); + return XFS_ERROR(EINVAL); + } + return 0; + + case XFS_SBS_FDBLOCKS: + /* + * if we are putting blocks back, put them into the reserve + * block pool first. + */ + if (mp->m_resblks != mp->m_resblks_avail && delta > 0) { + spin_lock(&mp->m_sb_lock); + res_used = (int64_t)(mp->m_resblks - + mp->m_resblks_avail); + if (res_used > delta) { + mp->m_resblks_avail += delta; + delta = 0; + } else { + delta -= res_used; + mp->m_resblks_avail = mp->m_resblks; + } + spin_unlock(&mp->m_sb_lock); + if (!delta) + return 0; + } + + /* try the change */ + ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_ICSB_FDBLOCKS], + delta, XFS_ALLOC_SET_ASIDE(mp)); + if (likely(ret >= 0)) + return 0; + + /* ENOSPC */ + ASSERT(delta < 0); + + if (!rsvd) + return XFS_ERROR(ENOSPC); + + spin_lock(&mp->m_sb_lock); + lcounter = (int64_t)mp->m_resblks_avail + delta; + if (lcounter >= 0) { + mp->m_resblks_avail = lcounter; + spin_unlock(&mp->m_sb_lock); + return 0; + } + spin_unlock(&mp->m_sb_lock); + printk_once(KERN_WARNING + "Filesystem \"%s\": reserve blocks depleted! " + "Consider increasing reserve pool size.", + mp->m_fsname); + return XFS_ERROR(ENOSPC); + default: + ASSERT(0); + return XFS_ERROR(EINVAL); + } + return 0; +} + /* * xfs_getsb() is called to obtain the buffer for the superblock. * The buffer is returned locked and read in from disk. @@ -2000,572 +2075,3 @@ xfs_dev_is_read_only( } return 0; } - -#ifdef HAVE_PERCPU_SB -/* - * Per-cpu incore superblock counters - * - * Simple concept, difficult implementation - * - * Basically, replace the incore superblock counters with a distributed per cpu - * counter for contended fields (e.g. free block count). - * - * Difficulties arise in that the incore sb is used for ENOSPC checking, and - * hence needs to be accurately read when we are running low on space. Hence - * there is a method to enable and disable the per-cpu counters based on how - * much "stuff" is available in them. - * - * Basically, a counter is enabled if there is enough free resource to justify - * running a per-cpu fast-path. If the per-cpu counter runs out (i.e. a local - * ENOSPC), then we disable the counters to synchronise all callers and - * re-distribute the available resources. - * - * If, once we redistributed the available resources, we still get a failure, - * we disable the per-cpu counter and go through the slow path. - * - * The slow path is the current xfs_mod_incore_sb() function. This means that - * when we disable a per-cpu counter, we need to drain its resources back to - * the global superblock. We do this after disabling the counter to prevent - * more threads from queueing up on the counter. - * - * Essentially, this means that we still need a lock in the fast path to enable - * synchronisation between the global counters and the per-cpu counters. This - * is not a problem because the lock will be local to a CPU almost all the time - * and have little contention except when we get to ENOSPC conditions. - * - * Basically, this lock becomes a barrier that enables us to lock out the fast - * path while we do things like enabling and disabling counters and - * synchronising the counters. - * - * Locking rules: - * - * 1. m_sb_lock before picking up per-cpu locks - * 2. per-cpu locks always picked up via for_each_online_cpu() order - * 3. accurate counter sync requires m_sb_lock + per cpu locks - * 4. modifying per-cpu counters requires holding per-cpu lock - * 5. modifying global counters requires holding m_sb_lock - * 6. enabling or disabling a counter requires holding the m_sb_lock - * and _none_ of the per-cpu locks. - * - * Disabled counters are only ever re-enabled by a balance operation - * that results in more free resources per CPU than a given threshold. - * To ensure counters don't remain disabled, they are rebalanced when - * the global resource goes above a higher threshold (i.e. some hysteresis - * is present to prevent thrashing). - */ - -#ifdef CONFIG_HOTPLUG_CPU -/* - * hot-plug CPU notifier support. - * - * We need a notifier per filesystem as we need to be able to identify - * the filesystem to balance the counters out. This is achieved by - * having a notifier block embedded in the xfs_mount_t and doing pointer - * magic to get the mount pointer from the notifier block address. - */ -STATIC int -xfs_icsb_cpu_notify( - struct notifier_block *nfb, - unsigned long action, - void *hcpu) -{ - xfs_icsb_cnts_t *cntp; - xfs_mount_t *mp; - - mp = (xfs_mount_t *)container_of(nfb, xfs_mount_t, m_icsb_notifier); - cntp = (xfs_icsb_cnts_t *) - per_cpu_ptr(mp->m_sb_cnts, (unsigned long)hcpu); - switch (action) { - case CPU_UP_PREPARE: - case CPU_UP_PREPARE_FROZEN: - /* Easy Case - initialize the area and locks, and - * then rebalance when online does everything else for us. */ - memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); - break; - case CPU_ONLINE: - case CPU_ONLINE_FROZEN: - xfs_icsb_lock(mp); - xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0); - xfs_icsb_unlock(mp); - break; - case CPU_DEAD: - case CPU_DEAD_FROZEN: - /* Disable all the counters, then fold the dead cpu's - * count into the total on the global superblock and - * re-enable the counters. */ - xfs_icsb_lock(mp); - spin_lock(&mp->m_sb_lock); - xfs_icsb_disable_counter(mp, XFS_SBS_ICOUNT); - xfs_icsb_disable_counter(mp, XFS_SBS_IFREE); - xfs_icsb_disable_counter(mp, XFS_SBS_FDBLOCKS); - - mp->m_sb.sb_icount += cntp->icsb_icount; - mp->m_sb.sb_ifree += cntp->icsb_ifree; - mp->m_sb.sb_fdblocks += cntp->icsb_fdblocks; - - memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); - - xfs_icsb_balance_counter_locked(mp, XFS_SBS_ICOUNT, 0); - xfs_icsb_balance_counter_locked(mp, XFS_SBS_IFREE, 0); - xfs_icsb_balance_counter_locked(mp, XFS_SBS_FDBLOCKS, 0); - spin_unlock(&mp->m_sb_lock); - xfs_icsb_unlock(mp); - break; - } - - return NOTIFY_OK; -} -#endif /* CONFIG_HOTPLUG_CPU */ - -int -xfs_icsb_init_counters( - xfs_mount_t *mp) -{ - xfs_icsb_cnts_t *cntp; - int i; - - mp->m_sb_cnts = alloc_percpu(xfs_icsb_cnts_t); - if (mp->m_sb_cnts == NULL) - return -ENOMEM; - -#ifdef CONFIG_HOTPLUG_CPU - mp->m_icsb_notifier.notifier_call = xfs_icsb_cpu_notify; - mp->m_icsb_notifier.priority = 0; - register_hotcpu_notifier(&mp->m_icsb_notifier); -#endif /* CONFIG_HOTPLUG_CPU */ - - for_each_online_cpu(i) { - cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); - memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); - } - - mutex_init(&mp->m_icsb_mutex); - - /* - * start with all counters disabled so that the - * initial balance kicks us off correctly - */ - mp->m_icsb_counters = -1; - return 0; -} - -void -xfs_icsb_reinit_counters( - xfs_mount_t *mp) -{ - xfs_icsb_lock(mp); - /* - * start with all counters disabled so that the - * initial balance kicks us off correctly - */ - mp->m_icsb_counters = -1; - xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0); - xfs_icsb_unlock(mp); -} - -void -xfs_icsb_destroy_counters( - xfs_mount_t *mp) -{ - if (mp->m_sb_cnts) { - unregister_hotcpu_notifier(&mp->m_icsb_notifier); - free_percpu(mp->m_sb_cnts); - } - mutex_destroy(&mp->m_icsb_mutex); -} - -STATIC void -xfs_icsb_lock_cntr( - xfs_icsb_cnts_t *icsbp) -{ - while (test_and_set_bit(XFS_ICSB_FLAG_LOCK, &icsbp->icsb_flags)) { - ndelay(1000); - } -} - -STATIC void -xfs_icsb_unlock_cntr( - xfs_icsb_cnts_t *icsbp) -{ - clear_bit(XFS_ICSB_FLAG_LOCK, &icsbp->icsb_flags); -} - - -STATIC void -xfs_icsb_lock_all_counters( - xfs_mount_t *mp) -{ - xfs_icsb_cnts_t *cntp; - int i; - - for_each_online_cpu(i) { - cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); - xfs_icsb_lock_cntr(cntp); - } -} - -STATIC void -xfs_icsb_unlock_all_counters( - xfs_mount_t *mp) -{ - xfs_icsb_cnts_t *cntp; - int i; - - for_each_online_cpu(i) { - cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); - xfs_icsb_unlock_cntr(cntp); - } -} - -STATIC void -xfs_icsb_count( - xfs_mount_t *mp, - xfs_icsb_cnts_t *cnt, - int flags) -{ - xfs_icsb_cnts_t *cntp; - int i; - - memset(cnt, 0, sizeof(xfs_icsb_cnts_t)); - - if (!(flags & XFS_ICSB_LAZY_COUNT)) - xfs_icsb_lock_all_counters(mp); - - for_each_online_cpu(i) { - cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); - cnt->icsb_icount += cntp->icsb_icount; - cnt->icsb_ifree += cntp->icsb_ifree; - cnt->icsb_fdblocks += cntp->icsb_fdblocks; - } - - if (!(flags & XFS_ICSB_LAZY_COUNT)) - xfs_icsb_unlock_all_counters(mp); -} - -STATIC int -xfs_icsb_counter_disabled( - xfs_mount_t *mp, - xfs_sb_field_t field) -{ - ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); - return test_bit(field, &mp->m_icsb_counters); -} - -STATIC void -xfs_icsb_disable_counter( - xfs_mount_t *mp, - xfs_sb_field_t field) -{ - xfs_icsb_cnts_t cnt; - - ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); - - /* - * If we are already disabled, then there is nothing to do - * here. We check before locking all the counters to avoid - * the expensive lock operation when being called in the - * slow path and the counter is already disabled. This is - * safe because the only time we set or clear this state is under - * the m_icsb_mutex. - */ - if (xfs_icsb_counter_disabled(mp, field)) - return; - - xfs_icsb_lock_all_counters(mp); - if (!test_and_set_bit(field, &mp->m_icsb_counters)) { - /* drain back to superblock */ - - xfs_icsb_count(mp, &cnt, XFS_ICSB_LAZY_COUNT); - switch(field) { - case XFS_SBS_ICOUNT: - mp->m_sb.sb_icount = cnt.icsb_icount; - break; - case XFS_SBS_IFREE: - mp->m_sb.sb_ifree = cnt.icsb_ifree; - break; - case XFS_SBS_FDBLOCKS: - mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks; - break; - default: - BUG(); - } - } - - xfs_icsb_unlock_all_counters(mp); -} - -STATIC void -xfs_icsb_enable_counter( - xfs_mount_t *mp, - xfs_sb_field_t field, - uint64_t count, - uint64_t resid) -{ - xfs_icsb_cnts_t *cntp; - int i; - - ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); - - xfs_icsb_lock_all_counters(mp); - for_each_online_cpu(i) { - cntp = per_cpu_ptr(mp->m_sb_cnts, i); - switch (field) { - case XFS_SBS_ICOUNT: - cntp->icsb_icount = count + resid; - break; - case XFS_SBS_IFREE: - cntp->icsb_ifree = count + resid; - break; - case XFS_SBS_FDBLOCKS: - cntp->icsb_fdblocks = count + resid; - break; - default: - BUG(); - break; - } - resid = 0; - } - clear_bit(field, &mp->m_icsb_counters); - xfs_icsb_unlock_all_counters(mp); -} - -void -xfs_icsb_sync_counters_locked( - xfs_mount_t *mp, - int flags) -{ - xfs_icsb_cnts_t cnt; - - xfs_icsb_count(mp, &cnt, flags); - - if (!xfs_icsb_counter_disabled(mp, XFS_SBS_ICOUNT)) - mp->m_sb.sb_icount = cnt.icsb_icount; - if (!xfs_icsb_counter_disabled(mp, XFS_SBS_IFREE)) - mp->m_sb.sb_ifree = cnt.icsb_ifree; - if (!xfs_icsb_counter_disabled(mp, XFS_SBS_FDBLOCKS)) - mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks; -} - -/* - * Accurate update of per-cpu counters to incore superblock - */ -void -xfs_icsb_sync_counters( - xfs_mount_t *mp, - int flags) -{ - spin_lock(&mp->m_sb_lock); - xfs_icsb_sync_counters_locked(mp, flags); - spin_unlock(&mp->m_sb_lock); -} - -/* - * Balance and enable/disable counters as necessary. - * - * Thresholds for re-enabling counters are somewhat magic. inode counts are - * chosen to be the same number as single on disk allocation chunk per CPU, and - * free blocks is something far enough zero that we aren't going thrash when we - * get near ENOSPC. We also need to supply a minimum we require per cpu to - * prevent looping endlessly when xfs_alloc_space asks for more than will - * be distributed to a single CPU but each CPU has enough blocks to be - * reenabled. - * - * Note that we can be called when counters are already disabled. - * xfs_icsb_disable_counter() optimises the counter locking in this case to - * prevent locking every per-cpu counter needlessly. - */ - -#define XFS_ICSB_INO_CNTR_REENABLE (uint64_t)64 -#define XFS_ICSB_FDBLK_CNTR_REENABLE(mp) \ - (uint64_t)(512 + XFS_ALLOC_SET_ASIDE(mp)) -STATIC void -xfs_icsb_balance_counter_locked( - xfs_mount_t *mp, - xfs_sb_field_t field, - int min_per_cpu) -{ - uint64_t count, resid; - int weight = num_online_cpus(); - uint64_t min = (uint64_t)min_per_cpu; - - /* disable counter and sync counter */ - xfs_icsb_disable_counter(mp, field); - - /* update counters - first CPU gets residual*/ - switch (field) { - case XFS_SBS_ICOUNT: - count = mp->m_sb.sb_icount; - resid = do_div(count, weight); - if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE)) - return; - break; - case XFS_SBS_IFREE: - count = mp->m_sb.sb_ifree; - resid = do_div(count, weight); - if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE)) - return; - break; - case XFS_SBS_FDBLOCKS: - count = mp->m_sb.sb_fdblocks; - resid = do_div(count, weight); - if (count < max(min, XFS_ICSB_FDBLK_CNTR_REENABLE(mp))) - return; - break; - default: - BUG(); - count = resid = 0; /* quiet, gcc */ - break; - } - - xfs_icsb_enable_counter(mp, field, count, resid); -} - -STATIC void -xfs_icsb_balance_counter( - xfs_mount_t *mp, - xfs_sb_field_t fields, - int min_per_cpu) -{ - spin_lock(&mp->m_sb_lock); - xfs_icsb_balance_counter_locked(mp, fields, min_per_cpu); - spin_unlock(&mp->m_sb_lock); -} - -int -xfs_icsb_modify_counters( - xfs_mount_t *mp, - xfs_sb_field_t field, - int64_t delta, - int rsvd) -{ - xfs_icsb_cnts_t *icsbp; - long long lcounter; /* long counter for 64 bit fields */ - int ret = 0; - - might_sleep(); -again: - preempt_disable(); - icsbp = this_cpu_ptr(mp->m_sb_cnts); - - /* - * if the counter is disabled, go to slow path - */ - if (unlikely(xfs_icsb_counter_disabled(mp, field))) - goto slow_path; - xfs_icsb_lock_cntr(icsbp); - if (unlikely(xfs_icsb_counter_disabled(mp, field))) { - xfs_icsb_unlock_cntr(icsbp); - goto slow_path; - } - - switch (field) { - case XFS_SBS_ICOUNT: - lcounter = icsbp->icsb_icount; - lcounter += delta; - if (unlikely(lcounter < 0)) - goto balance_counter; - icsbp->icsb_icount = lcounter; - break; - - case XFS_SBS_IFREE: - lcounter = icsbp->icsb_ifree; - lcounter += delta; - if (unlikely(lcounter < 0)) - goto balance_counter; - icsbp->icsb_ifree = lcounter; - break; - - case XFS_SBS_FDBLOCKS: - BUG_ON((mp->m_resblks - mp->m_resblks_avail) != 0); - - lcounter = icsbp->icsb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); - lcounter += delta; - if (unlikely(lcounter < 0)) - goto balance_counter; - icsbp->icsb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp); - break; - default: - BUG(); - break; - } - xfs_icsb_unlock_cntr(icsbp); - preempt_enable(); - return 0; - -slow_path: - preempt_enable(); - - /* - * serialise with a mutex so we don't burn lots of cpu on - * the superblock lock. We still need to hold the superblock - * lock, however, when we modify the global structures. - */ - xfs_icsb_lock(mp); - - /* - * Now running atomically. - * - * If the counter is enabled, someone has beaten us to rebalancing. - * Drop the lock and try again in the fast path.... - */ - if (!(xfs_icsb_counter_disabled(mp, field))) { - xfs_icsb_unlock(mp); - goto again; - } - - /* - * The counter is currently disabled. Because we are - * running atomically here, we know a rebalance cannot - * be in progress. Hence we can go straight to operating - * on the global superblock. We do not call xfs_mod_incore_sb() - * here even though we need to get the m_sb_lock. Doing so - * will cause us to re-enter this function and deadlock. - * Hence we get the m_sb_lock ourselves and then call - * xfs_mod_incore_sb_unlocked() as the unlocked path operates - * directly on the global counters. - */ - spin_lock(&mp->m_sb_lock); - ret = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd); - spin_unlock(&mp->m_sb_lock); - - /* - * Now that we've modified the global superblock, we - * may be able to re-enable the distributed counters - * (e.g. lots of space just got freed). After that - * we are done. - */ - if (ret != ENOSPC) - xfs_icsb_balance_counter(mp, field, 0); - xfs_icsb_unlock(mp); - return ret; - -balance_counter: - xfs_icsb_unlock_cntr(icsbp); - preempt_enable(); - - /* - * We may have multiple threads here if multiple per-cpu - * counters run dry at the same time. This will mean we can - * do more balances than strictly necessary but it is not - * the common slowpath case. - */ - xfs_icsb_lock(mp); - - /* - * running atomically. - * - * This will leave the counter in the correct state for future - * accesses. After the rebalance, we simply try again and our retry - * will either succeed through the fast path or slow path without - * another balance operation being required. - */ - xfs_icsb_balance_counter(mp, field, delta); - xfs_icsb_unlock(mp); - goto again; -} - -#endif diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 5861b49..42d31df 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -65,44 +65,19 @@ struct xfs_nameops; struct xfs_ail; struct xfs_quotainfo; -#ifdef HAVE_PERCPU_SB - /* - * Valid per-cpu incore superblock counters. Note that if you add new counters, - * you may need to define new counter disabled bit field descriptors as there - * are more possible fields in the superblock that can fit in a bitfield on a - * 32 bit platform. The XFS_SBS_* values for the current current counters just - * fit. + * Per-cpu incore superblock counters. */ -typedef struct xfs_icsb_cnts { - uint64_t icsb_fdblocks; - uint64_t icsb_ifree; - uint64_t icsb_icount; - unsigned long icsb_flags; -} xfs_icsb_cnts_t; - -#define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ - -#define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ +enum { + XFS_ICSB_FDBLOCKS = 0, + XFS_ICSB_IFREE, + XFS_ICSB_ICOUNT, + XFS_ICSB_MAX, +}; -extern int xfs_icsb_init_counters(struct xfs_mount *); -extern void xfs_icsb_reinit_counters(struct xfs_mount *); -extern void xfs_icsb_destroy_counters(struct xfs_mount *); -extern void xfs_icsb_sync_counters(struct xfs_mount *, int); -extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, int64_t, int); -#else -#define xfs_icsb_init_counters(mp) (0) -#define xfs_icsb_destroy_counters(mp) do { } while (0) -#define xfs_icsb_reinit_counters(mp) do { } while (0) -#define xfs_icsb_sync_counters(mp, flags) do { } while (0) -#define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) -#define xfs_icsb_modify_counters(mp, field, delta, rsvd) \ - xfs_mod_incore_sb(mp, field, delta, rsvd) -#endif - typedef struct xfs_mount { struct super_block *m_super; xfs_tid_t m_tid; /* next unused tid for fs */ @@ -186,12 +161,6 @@ typedef struct xfs_mount { struct xfs_chash *m_chash; /* fs private inode per-cluster * hash table */ atomic_t m_active_trans; /* number trans frozen */ -#ifdef HAVE_PERCPU_SB - xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */ - unsigned long m_icsb_counters; /* disabled per-cpu counters */ - struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ - struct mutex m_icsb_mutex; /* balancer sync lock */ -#endif struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ struct task_struct *m_sync_task; /* generalised sync thread */ xfs_sync_work_t m_sync_work; /* work item for VFS_SYNC */ @@ -202,6 +171,7 @@ typedef struct xfs_mount { __int64_t m_update_flags; /* sb flags we need to update on the next remount,rw */ struct shrinker m_inode_shrink; /* inode reclaim shrinker */ + struct percpu_counter m_icsb[XFS_ICSB_MAX]; } xfs_mount_t; /* @@ -333,26 +303,6 @@ struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno, void xfs_perag_put(struct xfs_perag *pag); /* - * Per-cpu superblock locking functions - */ -#ifdef HAVE_PERCPU_SB -static inline void -xfs_icsb_lock(xfs_mount_t *mp) -{ - mutex_lock(&mp->m_icsb_mutex); -} - -static inline void -xfs_icsb_unlock(xfs_mount_t *mp) -{ - mutex_unlock(&mp->m_icsb_mutex); -} -#else -#define xfs_icsb_lock(mp) -#define xfs_icsb_unlock(mp) -#endif - -/* * This structure is for use by the xfs_mod_incore_sb_batch() routine. * xfs_growfs can specify a few fields which are more than int limit */ @@ -379,6 +329,11 @@ extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); extern int xfs_dev_is_read_only(struct xfs_mount *, char *); +extern int xfs_icsb_init_counters(struct xfs_mount *); +extern void xfs_icsb_reinit_counters(struct xfs_mount *); +extern void xfs_icsb_destroy_counters(struct xfs_mount *); +extern void xfs_icsb_sync_counters(struct xfs_mount *); + #endif /* __KERNEL__ */ extern void xfs_mod_sb(struct xfs_trans *, __int64_t); -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 19:25:00 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD1Ox1J148058 for ; Sun, 12 Dec 2010 19:25:00 -0600 X-ASG-Debug-ID: 1292203609-226801310000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 22F021E2B5E for ; Sun, 12 Dec 2010 17:26:49 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id Yr35m34d8FCI7kzD for ; Sun, 12 Dec 2010 17:26:49 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50106617-1927428 for ; Mon, 13 Dec 2010 11:56:48 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PRxBf-0001lx-8J for xfs@oss.sgi.com; Mon, 13 Dec 2010 12:26:47 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PRxAB-00045u-SP for xfs@oss.sgi.com; Mon, 13 Dec 2010 12:25:15 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 2/2] xfs: don't truncate prealloc from frequently accessed inodes Subject: [PATCH 2/2] xfs: don't truncate prealloc from frequently accessed inodes Date: Mon, 13 Dec 2010 12:25:11 +1100 Message-Id: <1292203511-15685-3-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292203511-15685-1-git-send-email-david@fromorbit.com> References: <1292203511-15685-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292203611 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_SA210e X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49261 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 BSF_SC5_SA210e Custom Rule SA210e X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner A long standing problem for streaming writeÑ• through the NFS server has been that the NFS server opens and closes file descriptors on an inode for every write. The result of this behaviour is that the ->release() function is called on every close and that results in XFS truncating speculative preallocation beyond the EOF. This has an adverse effect on file layout when multiple files are being written at the same time - they interleave their extents and can result in severe fragmentation. To avoid this problem, keep a count of the number of ->release calls made on an inode. For most cases, an inode is only going to be opened once for writing and then closed again during it's lifetime in cache. Hence if there are multiple ->release calls, there is a good chance that the inode is being accessed by the NFS server. Hence count up every time ->release is called while there are delalloc blocks still outstanding on the inode. If this count is non-zero when ->release is next called, then do no truncate away the speculative preallocation - leave it there so that subsequent writes do not need to reallocate the delalloc space. This will prevent interleaving of extents of different inodes written concurrently to the same AG. If we get this wrong, it is not a big deal as we truncate speculative allocation beyond EOF anyway in xfs_inactive() when the inode is thrown out of the cache. The new counter in the struct xfs_inode fits into a hole in the structure on 64 bit machines, so does not grow the size of the inode at all. Signed-off-by: Dave Chinner --- fs/xfs/xfs_inode.h | 13 +++++----- fs/xfs/xfs_vnodeops.c | 61 ++++++++++++++++++++++++++++++++----------------- 2 files changed, 47 insertions(+), 27 deletions(-) diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 1c6514d..5c95fa8 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -376,12 +376,13 @@ static inline void xfs_ifunlock(xfs_inode_t *ip) /* * In-core inode flags. */ -#define XFS_IRECLAIM 0x0001 /* we have started reclaiming this inode */ -#define XFS_ISTALE 0x0002 /* inode has been staled */ -#define XFS_IRECLAIMABLE 0x0004 /* inode can be reclaimed */ -#define XFS_INEW 0x0008 /* inode has just been allocated */ -#define XFS_IFILESTREAM 0x0010 /* inode is in a filestream directory */ -#define XFS_ITRUNCATED 0x0020 /* truncated down so flush-on-close */ +#define XFS_IRECLAIM 0x0001 /* started reclaiming this inode */ +#define XFS_ISTALE 0x0002 /* inode has been staled */ +#define XFS_IRECLAIMABLE 0x0004 /* inode can be reclaimed */ +#define XFS_INEW 0x0008 /* inode has just been allocated */ +#define XFS_IFILESTREAM 0x0010 /* inode is in a filestream directory */ +#define XFS_ITRUNCATED 0x0020 /* truncated down so flush-on-close */ +#define XFS_IDIRTY_RELEASE 0x0040 /* dirty release already seen */ /* * Flags for inode locking. diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 8e4a63c..d8e6f8c 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -964,29 +964,48 @@ xfs_release( xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE); } - if (ip->i_d.di_nlink != 0) { - if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && - ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || - ip->i_delayed_blks > 0)) && - (ip->i_df.if_flags & XFS_IFEXTENTS)) && - (!(ip->i_d.di_flags & - (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { + if (ip->i_d.di_nlink == 0) + return 0; - /* - * If we can't get the iolock just skip truncating - * the blocks past EOF because we could deadlock - * with the mmap_sem otherwise. We'll get another - * chance to drop them once the last reference to - * the inode is dropped, so we'll never leak blocks - * permanently. - */ - error = xfs_free_eofblocks(mp, ip, - XFS_FREE_EOF_TRYLOCK); - if (error) - return error; - } - } + if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && + ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || + ip->i_delayed_blks > 0)) && + (ip->i_df.if_flags & XFS_IFEXTENTS)) && + (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { + /* + * If we can't get the iolock just skip truncating the blocks + * past EOF because we could deadlock with the mmap_sem + * otherwise. We'll get another chance to drop them once the + * last reference to the inode is dropped, so we'll never leak + * blocks permanently. + * + * Further, check if the inode is being opened, written and + * closed frequently and we have delayed allocation blocks + * oustanding (e.g. streaming writes from the NFS server), + * truncating the blocks past EOF will cause fragmentation to + * occur. + * + * In this case don't do the truncation, either, but we have to + * be careful how we detect this case. Blocks beyond EOF show + * up as i_delayed_blks even when the inode is clean, so we + * need to truncate them away first before checking for a dirty + * release. Hence on the first dirty close we will still remove + * the speculative allocation, but after that we will leave it + * in place. + */ + if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) + return 0; + + error = xfs_free_eofblocks(mp, ip, + XFS_FREE_EOF_TRYLOCK); + if (error) + return error; + + /* delalloc blocks after truncation means it really is dirty */ + if (ip->i_delayed_blks) + xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); + } return 0; } -- 1.7.2.3 From SRS0+gPCZ+16+fromorbit.com=dave@internode.on.net Sun Dec 12 19:25:00 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_72 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD1P0oN148061 for ; Sun, 12 Dec 2010 19:25:00 -0600 X-ASG-Debug-ID: 1292203609-0be901da0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 435AE1CBC343 for ; Sun, 12 Dec 2010 17:26:49 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id DU7H8Yrr3ibITUTJ for ; Sun, 12 Dec 2010 17:26:49 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49733300-1927428 for ; Mon, 13 Dec 2010 11:56:48 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PRxBf-0001lw-6o for xfs@oss.sgi.com; Mon, 13 Dec 2010 12:26:47 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PRxAB-00045s-QA for xfs@oss.sgi.com; Mon, 13 Dec 2010 12:25:15 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 1/2] xfs: dynamic speculative EOF preallocation Subject: [PATCH 1/2] xfs: dynamic speculative EOF preallocation Date: Mon, 13 Dec 2010 12:25:10 +1100 Message-Id: <1292203511-15685-2-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292203511-15685-1-git-send-email-david@fromorbit.com> References: <1292203511-15685-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1292203611 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49261 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Currently the size of the speculative preallocation during delayed allocation is fixed by either the allocsize mount option of a default size. We are seeing a lot of cases where we need to recommend using the allocsize mount option to prevent fragmentation when buffered writes land in the same AG. Rather than using a fixed preallocation size by default (up to 64k), make it dynamic by basing it on the current inode size. That way the EOF preallocation will increase as the file size increases. Hence for streaming writes we are much more likely to get large preallocations exactly when we need it to reduce fragementation. For default settings, the size of the initial extents is determined by the number of parallel writers and the amount of memory in the machine. For 4GB RAM and 4 concurrent 32GB file writes: EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET TOTAL 0: [0..1048575]: 1048672..2097247 0 (1048672..2097247) 1048576 1: [1048576..2097151]: 5242976..6291551 0 (5242976..6291551) 1048576 2: [2097152..4194303]: 12583008..14680159 0 (12583008..14680159) 2097152 3: [4194304..8388607]: 25165920..29360223 0 (25165920..29360223) 4194304 4: [8388608..16777215]: 58720352..67108959 0 (58720352..67108959) 8388608 5: [16777216..33554423]: 117440584..134217791 0 (117440584..134217791) 16777208 6: [33554424..50331511]: 184549056..201326143 0 (184549056..201326143) 16777088 7: [50331512..67108599]: 251657408..268434495 0 (251657408..268434495) 16777088 and for 16 concurrent 16GB file writes: EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET TOTAL 0: [0..262143]: 2490472..2752615 0 (2490472..2752615) 262144 1: [262144..524287]: 6291560..6553703 0 (6291560..6553703) 262144 2: [524288..1048575]: 13631592..14155879 0 (13631592..14155879) 524288 3: [1048576..2097151]: 30408808..31457383 0 (30408808..31457383) 1048576 4: [2097152..4194303]: 52428904..54526055 0 (52428904..54526055) 2097152 5: [4194304..8388607]: 104857704..109052007 0 (104857704..109052007) 4194304 6: [8388608..16777215]: 209715304..218103911 0 (209715304..218103911) 8388608 7: [16777216..33554423]: 452984848..469762055 0 (452984848..469762055) 16777208 Because it is hard to take back specualtive preallocation, cases where there are large slow growing log files on a nearly full filesystem may cause premature ENOSPC. Hence as the filesystem nears full, the maximum dynamic prealloc size Ñ–s reduced according to this table (based on 4k block size): freespace max prealloc size >5% full extent (8GB) 4-5% 2GB (8GB >> 2) 3-4% 1GB (8GB >> 3) 2-3% 512MB (8GB >> 4) 1-2% 256MB (8GB >> 5) <1% 128MB (8GB >> 6) This should reduce the amount of space held in speculative preallocation for such cases. The allocsize mount option turns off the dynamic behaviour and fixes the prealloc size to whatever the mount option specifies. i.e. the behaviour is unchanged. Signed-off-by: Dave Chinner --- fs/xfs/xfs_fsops.c | 1 + fs/xfs/xfs_iomap.c | 85 +++++++++++++++++++++++++++++++++++++++++++++------ fs/xfs/xfs_mount.c | 21 +++++++++++++ fs/xfs/xfs_mount.h | 14 ++++++++ 4 files changed, 111 insertions(+), 10 deletions(-) diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index be34ff2..6d17206 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -374,6 +374,7 @@ xfs_growfs_data_private( mp->m_maxicount = icount << mp->m_sb.sb_inopblog; } else mp->m_maxicount = 0; + xfs_set_low_space_thresholds(mp); /* update secondary superblocks. */ for (agno = 1; agno < nagcount; agno++) { diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 2057614..40f9612 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -389,6 +389,9 @@ error_out: * If the caller is doing a write at the end of the file, then extend the * allocation out to the file system's write iosize. We clean up any extra * space left over when the file is closed in xfs_inactive(). + * + * If we find we already have delalloc preallocation beyond EOF, don't do more + * preallocation as it it not needed. */ STATIC int xfs_iomap_eof_want_preallocate( @@ -405,6 +408,7 @@ xfs_iomap_eof_want_preallocate( xfs_filblks_t count_fsb; xfs_fsblock_t firstblock; int n, error, imaps; + int found_delalloc = 0; *prealloc = 0; if ((offset + count) <= ip->i_size) @@ -427,14 +431,63 @@ xfs_iomap_eof_want_preallocate( if ((imap[n].br_startblock != HOLESTARTBLOCK) && (imap[n].br_startblock != DELAYSTARTBLOCK)) return 0; + start_fsb += imap[n].br_blockcount; count_fsb -= imap[n].br_blockcount; + + if (imap[n].br_startblock == DELAYSTARTBLOCK) + found_delalloc = 1; } } - *prealloc = 1; + if (!found_delalloc) + *prealloc = 1; return 0; } +/* + * If we don't have a user specified preallocation size, dynamically increase + * the preallocation size as the size of the file grows. Cap the maximum size + * at a single extent or less if the filesystem is near full. The closer the + * filesystem is to full, the smaller the maximum prealocation. + */ +STATIC xfs_fsblock_t +xfs_iomap_prealloc_size( + struct xfs_mount *mp, + struct xfs_inode *ip) +{ + xfs_fsblock_t alloc_blocks = 0; + + if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { + int shift = 0; + int64_t freesp; + + alloc_blocks = XFS_B_TO_FSB(mp, ip->i_size); + alloc_blocks = XFS_FILEOFF_MIN(MAXEXTLEN, + rounddown_pow_of_two(alloc_blocks)); + + freesp = percpu_counter_read_positive( + &mp->m_icsb[XFS_ICSB_FDBLOCKS]); + if (freesp < mp->m_low_space[XFS_LOWSP_5_PCNT]) { + shift = 2; + if (freesp < mp->m_low_space[XFS_LOWSP_4_PCNT]) + shift++; + if (freesp < mp->m_low_space[XFS_LOWSP_3_PCNT]) + shift++; + if (freesp < mp->m_low_space[XFS_LOWSP_2_PCNT]) + shift++; + if (freesp < mp->m_low_space[XFS_LOWSP_1_PCNT]) + shift++; + } + if (shift) + alloc_blocks >>= shift; + } + + if (alloc_blocks < mp->m_writeio_blocks) + alloc_blocks = mp->m_writeio_blocks; + + return alloc_blocks; +} + STATIC int xfs_iomap_write_delay( xfs_inode_t *ip, @@ -469,6 +522,7 @@ xfs_iomap_write_delay( extsz = xfs_get_extsz_hint(ip); offset_fsb = XFS_B_TO_FSBT(mp, offset); + error = xfs_iomap_eof_want_preallocate(mp, ip, offset, count, ioflag, imap, XFS_WRITE_IMAPS, &prealloc); if (error) @@ -476,9 +530,11 @@ xfs_iomap_write_delay( retry: if (prealloc) { + xfs_fsblock_t alloc_blocks = xfs_iomap_prealloc_size(mp, ip); + aligned_offset = XFS_WRITEIO_ALIGN(mp, (offset + count - 1)); ioalign = XFS_B_TO_FSBT(mp, aligned_offset); - last_fsb = ioalign + mp->m_writeio_blocks; + last_fsb = ioalign + alloc_blocks; } else { last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); } @@ -496,22 +552,31 @@ retry: XFS_BMAPI_DELAY | XFS_BMAPI_WRITE | XFS_BMAPI_ENTIRE, &firstblock, 1, imap, &nimaps, NULL); - if (error && (error != ENOSPC)) + switch (error) { + case 0: + case ENOSPC: + case EDQUOT: + break; + default: return XFS_ERROR(error); + } /* - * If bmapi returned us nothing, and if we didn't get back EDQUOT, - * then we must have run out of space - flush all other inodes with - * delalloc blocks and retry without EOF preallocation. + * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. For + * ENOSPC, * flush all other inodes with delalloc blocks to free up + * some of the excess reserved metadata space. For both cases, retry + * without EOF preallocation. */ if (nimaps == 0) { trace_xfs_delalloc_enospc(ip, offset, count); if (flushed) - return XFS_ERROR(ENOSPC); + return XFS_ERROR(error ? error : ENOSPC); - xfs_iunlock(ip, XFS_ILOCK_EXCL); - xfs_flush_inodes(ip); - xfs_ilock(ip, XFS_ILOCK_EXCL); + if (error == ENOSPC) { + xfs_iunlock(ip, XFS_ILOCK_EXCL); + xfs_flush_inodes(ip); + xfs_ilock(ip, XFS_ILOCK_EXCL); + } flushed = 1; error = 0; diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 5e41ef3..fe27338 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -1101,6 +1101,24 @@ xfs_set_rw_sizes(xfs_mount_t *mp) } /* + * precalculate the low space thresholds for dynamic speculative preallocation. + */ +void +xfs_set_low_space_thresholds( + struct xfs_mount *mp) +{ + int i; + + for (i = 0; i < XFS_LOWSP_MAX; i++) { + __uint64_t space = mp->m_sb.sb_dblocks; + + do_div(space, 100); + mp->m_low_space[i] = space * (i + 1); + } +} + + +/* * Set whether we're using inode alignment. */ STATIC void @@ -1322,6 +1340,9 @@ xfs_mountfs( */ xfs_set_rw_sizes(mp); + /* set the low space thresholds for dynamic preallocation */ + xfs_set_low_space_thresholds(mp); + /* * Set the inode cluster size. * This may still be overridden by the file system diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 03ad25c6..7b42e04 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -75,6 +75,16 @@ enum { XFS_ICSB_MAX, }; +/* dynamic preallocation free space thresholds, 5% down to 1% */ +enum { + XFS_LOWSP_1_PCNT = 0, + XFS_LOWSP_2_PCNT, + XFS_LOWSP_3_PCNT, + XFS_LOWSP_4_PCNT, + XFS_LOWSP_5_PCNT, + XFS_LOWSP_MAX, +}; + typedef struct xfs_mount { struct super_block *m_super; xfs_tid_t m_tid; /* next unused tid for fs */ @@ -169,6 +179,8 @@ typedef struct xfs_mount { on the next remount,rw */ struct shrinker m_inode_shrink; /* inode reclaim shrinker */ struct percpu_counter m_icsb[XFS_ICSB_MAX]; + int64_t m_low_space[XFS_LOWSP_MAX]; + /* low free space thresholds */ } xfs_mount_t; /* @@ -333,6 +345,8 @@ extern void xfs_icsb_sync_counters(struct xfs_mount *); extern int xfs_icsb_modify_inodes(struct xfs_mount *, int, int64_t); extern int xfs_icsb_modify_free_blocks(struct xfs_mount *, int64_t, int); +extern void xfs_set_low_space_thresholds(struct xfs_mount *); + #endif /* __KERNEL__ */ extern void xfs_mod_sb(struct xfs_trans *, __int64_t); -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 19:25:09 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD1P9Lc148093 for ; Sun, 12 Dec 2010 19:25:09 -0600 X-ASG-Debug-ID: 1292203618-768002f60000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 94DCB1E2B5F for ; Sun, 12 Dec 2010 17:26:59 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id 6w5QCGUpoXGtiZBT for ; Sun, 12 Dec 2010 17:26:59 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49418373-1927428 for ; Mon, 13 Dec 2010 11:56:58 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PRxBf-0001lv-5L for xfs@oss.sgi.com; Mon, 13 Dec 2010 12:26:47 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PRxAB-00045q-Og for xfs@oss.sgi.com; Mon, 13 Dec 2010 12:25:15 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 0/2] xfs: dynamic speculative allocation beyond EOF V4 Subject: [PATCH 0/2] xfs: dynamic speculative allocation beyond EOF V4 Date: Mon, 13 Dec 2010 12:25:09 +1100 Message-Id: <1292203511-15685-1-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 X-Barracuda-Connect: bld-mail18.adl2.internode.on.net[150.101.137.103] X-Barracuda-Start-Time: 1292203620 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49261 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This is the latest version of the dynamic speculative allocation beyond EOF patch set. The description of the patchset can be found here: http://oss.sgi.com/archives/xfs/2010-10/msg00040.html Version 4: - factored prealloc size into separate function to keep xfs_iomap_write_delay() easy to read. - convert i_dirty_releases counter to a flag. Version 3: - allocsize mount option returned to fixed preallocation size only. - reduces maximum dynamic prealloc size as the filesytem gets near full. - split i_delayed_blks bug fixes into new patch (posted in 2.6.37-rc bug fix series) Version 2: - base speculative execution size on current inode size, not the number of previous speculative allocations. From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 19:33:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD1X0tj148732 for ; Sun, 12 Dec 2010 19:33:01 -0600 X-ASG-Debug-ID: 1292204090-304e00560000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DA6CF1CBC35E for ; Sun, 12 Dec 2010 17:34:50 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id TI3MdLKvhAEMdSnM for ; Sun, 12 Dec 2010 17:34:50 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49419284-1927428 for multiple; Mon, 13 Dec 2010 12:04:42 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PRxJI-0001mo-DQ; Mon, 13 Dec 2010 12:34:40 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PRxHe-00048h-UF; Mon, 13 Dec 2010 12:32:58 +1100 From: Dave Chinner To: xfs@oss.sgi.com Cc: paulmck@linux.vnet.ibm.com, eric.dumazet@gmail.com X-ASG-Orig-Subj: [PATCH 1/3] xfs: rcu free inodes Subject: [PATCH 1/3] xfs: rcu free inodes Date: Mon, 13 Dec 2010 12:32:35 +1100 Message-Id: <1292203957-15819-2-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292203957-15819-1-git-send-email-david@fromorbit.com> References: <1292203957-15819-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail18.adl2.internode.on.net[150.101.137.103] X-Barracuda-Start-Time: 1292204091 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.92 X-Barracuda-Spam-Status: No, SCORE=-0.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE_7582B, MARKETING_SUBJECT X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49261 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.60 MARKETING_SUBJECT Subject contains popular marketing words 0.50 BSF_RULE_7582B Custom Rule 7582B X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Introduce RCU freeing of XFS inodes so that we can convert lookup traversals to use rcu_read_lock() protection. This patch only introduces the RCU freeing to minimise the potential conflicts with mainline if this is merged into mainline via a VFS patchset. It abuses the i_dentry list for the RCU callback structure because the VFS patches make this a union so it is safe to use like this and simplifies and merge issues. This patch uses basic RCU freeing rather than SLAB_DESTROY_BY_RCU. The later lookup patches need the same "found free inode" protection regardless of the RCU freeing method used, so once again the RCU freeing method can be dealt with apprpriately at merge time without affecting any other code. Signed-off-by: Dave Chinner --- fs/xfs/xfs_iget.c | 14 +++++++++++++- 1 files changed, 13 insertions(+), 1 deletions(-) diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index cdb1c25..9fae475 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -105,6 +105,18 @@ xfs_inode_alloc( } void +__xfs_inode_free( + struct rcu_head *head) +{ + struct inode *inode = container_of((void *)head, + struct inode, i_dentry); + struct xfs_inode *ip = XFS_I(inode); + + INIT_LIST_HEAD(&inode->i_dentry); + kmem_zone_free(xfs_inode_zone, ip); +} + +void xfs_inode_free( struct xfs_inode *ip) { @@ -147,7 +159,7 @@ xfs_inode_free( ASSERT(!spin_is_locked(&ip->i_flags_lock)); ASSERT(completion_done(&ip->i_flush)); - kmem_zone_free(xfs_inode_zone, ip); + call_rcu((struct rcu_head *)&VFS_I(ip)->i_dentry, __xfs_inode_free); } /* -- 1.7.2.3 From SRS0+Gu6A+16+fromorbit.com=dave@internode.on.net Sun Dec 12 19:33:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD1X0se148734 for ; Sun, 12 Dec 2010 19:33:01 -0600 X-ASG-Debug-ID: 1292204090-5bc303a10000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 48944143F82C for ; Sun, 12 Dec 2010 17:34:51 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id p7bNHA5xLSJAcjd3 for ; Sun, 12 Dec 2010 17:34:51 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49867479-1927428 for multiple; Mon, 13 Dec 2010 12:04:32 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PRxJ8-0001me-HJ; Mon, 13 Dec 2010 12:34:30 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PRxHf-00048l-0z; Mon, 13 Dec 2010 12:32:59 +1100 From: Dave Chinner To: xfs@oss.sgi.com Cc: paulmck@linux.vnet.ibm.com, eric.dumazet@gmail.com X-ASG-Orig-Subj: [PATCH 3/3] xfs: convert pag_ici_lock to a spin lock Subject: [PATCH 3/3] xfs: convert pag_ici_lock to a spin lock Date: Mon, 13 Dec 2010 12:32:37 +1100 Message-Id: <1292203957-15819-4-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292203957-15819-1-git-send-email-david@fromorbit.com> References: <1292203957-15819-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292204092 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49260 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner now that we are using RCU protection for the inode cache lookups, the lock is only needed on the modification side. Hence it is not necessary for the lock to be a rwlock as there are no read side holders anymore. Convert it to a spin lock to reflect it's exclusive nature. Signed-off-by: Dave Chinner Reviewed-by: Alex Elder Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_sync.c | 14 +++++++------- fs/xfs/xfs_ag.h | 2 +- fs/xfs/xfs_iget.c | 10 +++++----- fs/xfs/xfs_mount.c | 2 +- 4 files changed, 14 insertions(+), 14 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c index 5ee02d7..d3b3b4f 100644 --- a/fs/xfs/linux-2.6/xfs_sync.c +++ b/fs/xfs/linux-2.6/xfs_sync.c @@ -602,12 +602,12 @@ xfs_inode_set_reclaim_tag( struct xfs_perag *pag; pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); spin_lock(&ip->i_flags_lock); __xfs_inode_set_reclaim_tag(pag, ip); __xfs_iflags_set(ip, XFS_IRECLAIMABLE); spin_unlock(&ip->i_flags_lock); - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); xfs_perag_put(pag); } @@ -808,12 +808,12 @@ reclaim: * added to the tree assert that it's been there before to catch * problems with the inode life time early on. */ - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); if (!radix_tree_delete(&pag->pag_ici_root, XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino))) ASSERT(0); __xfs_inode_clear_reclaim(pag, ip); - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); /* * Here we do an (almost) spurious inode lock in order to coordinate @@ -877,14 +877,14 @@ restart: struct xfs_inode *batch[XFS_LOOKUP_BATCH]; int i; - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); nr_found = radix_tree_gang_lookup_tag( &pag->pag_ici_root, (void **)batch, first_index, XFS_LOOKUP_BATCH, XFS_ICI_RECLAIM_TAG); if (!nr_found) { - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); break; } @@ -911,7 +911,7 @@ restart: } /* unlock now we've grabbed the inodes. */ - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); for (i = 0; i < nr_found; i++) { if (!batch[i]) diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h index 63c7a1a..58632cc 100644 --- a/fs/xfs/xfs_ag.h +++ b/fs/xfs/xfs_ag.h @@ -227,7 +227,7 @@ typedef struct xfs_perag { atomic_t pagf_fstrms; /* # of filestreams active in this AG */ - rwlock_t pag_ici_lock; /* incore inode lock */ + spinlock_t pag_ici_lock; /* incore inode cache lock */ struct radix_tree_root pag_ici_root; /* incore inode cache root */ int pag_ici_reclaimable; /* reclaimable inodes */ struct mutex pag_ici_reclaim_lock; /* serialisation point */ diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index 1e3b035..ec440da 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -263,7 +263,7 @@ xfs_iget_cache_hit( goto out_error; } - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); spin_lock(&ip->i_flags_lock); ip->i_flags &= ~(XFS_IRECLAIMABLE | XFS_IRECLAIM); ip->i_flags |= XFS_INEW; @@ -276,7 +276,7 @@ xfs_iget_cache_hit( &xfs_iolock_active, "xfs_iolock_active"); spin_unlock(&ip->i_flags_lock); - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); } else { /* If the VFS inode is being torn down, pause and try again. */ if (!igrab(inode)) { @@ -354,7 +354,7 @@ xfs_iget_cache_miss( BUG(); } - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); /* insert the new inode */ error = radix_tree_insert(&pag->pag_ici_root, agino, ip); @@ -369,14 +369,14 @@ xfs_iget_cache_miss( ip->i_udquot = ip->i_gdquot = NULL; xfs_iflags_set(ip, XFS_INEW); - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); radix_tree_preload_end(); *ipp = ip; return 0; out_preload_end: - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); radix_tree_preload_end(); if (lock_flags) xfs_iunlock(ip, lock_flags); diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index fe27338..52186c0 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -598,7 +598,7 @@ xfs_initialize_perag( goto out_unwind; pag->pag_agno = index; pag->pag_mount = mp; - rwlock_init(&pag->pag_ici_lock); + spin_lock_init(&pag->pag_ici_lock); mutex_init(&pag->pag_ici_reclaim_lock); INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC); spin_lock_init(&pag->pag_buf_lock); -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 19:33:03 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD1X3jK148757 for ; Sun, 12 Dec 2010 19:33:03 -0600 X-ASG-Debug-ID: 1292204092-706703870000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1B02C1E2B80 for ; Sun, 12 Dec 2010 17:34:52 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id nNGqwBEojpfcj1YQ for ; Sun, 12 Dec 2010 17:34:52 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50107344-1927428 for multiple; Mon, 13 Dec 2010 12:04:41 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PRxJD-0001mk-Fp; Mon, 13 Dec 2010 12:34:35 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PRxHe-00048j-Vj; Mon, 13 Dec 2010 12:32:58 +1100 From: Dave Chinner To: xfs@oss.sgi.com Cc: paulmck@linux.vnet.ibm.com, eric.dumazet@gmail.com X-ASG-Orig-Subj: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Subject: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Date: Mon, 13 Dec 2010 12:32:36 +1100 Message-Id: <1292203957-15819-3-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292203957-15819-1-git-send-email-david@fromorbit.com> References: <1292203957-15819-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292204094 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49261 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner With delayed logging greatly increasing the sustained parallelism of inode operations, the inode cache locking is showing significant read vs write contention when inode reclaim runs at the same time as lookups. There is also a lot more write lock acquistions than there are read locks (4:1 ratio) so the read locking is not really buying us much in the way of parallelism. To avoid the read vs write contention, change the cache to use RCU locking on the read side. To avoid needing to RCU free every single inode, use the built in slab RCU freeing mechanism. This requires us to be able to detect lookups of freed inodes, so enÑ•ure that ever freed inode has an inode number of zero and the XFS_IRECLAIM flag set. We already check the XFS_IRECLAIM flag in cache hit lookup path, but also add a check for a zero inode number as well. We canthen convert all the read locking lockups to use RCU read side locking and hence remove all read side locking. Signed-off-by: Dave Chinner Reviewed-by: Alex Elder --- fs/xfs/linux-2.6/xfs_sync.c | 27 ++++++++++++++++----- fs/xfs/xfs_iget.c | 50 +++++++++++++++++++++++++++++++---------- fs/xfs/xfs_inode.c | 52 +++++++++++++++++++++++++++++++++---------- 3 files changed, 98 insertions(+), 31 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c index afb0d7c..5ee02d7 100644 --- a/fs/xfs/linux-2.6/xfs_sync.c +++ b/fs/xfs/linux-2.6/xfs_sync.c @@ -53,14 +53,20 @@ xfs_inode_ag_walk_grab( { struct inode *inode = VFS_I(ip); + /* check for stale RCU freed inode */ + spin_lock(&ip->i_flags_lock); + if (!ip->i_ino) + goto out_unlock_noent; + + /* avoid new or reclaimable inodes. Leave for reclaim code to flush */ + if (__xfs_iflags_test(ip, XFS_INEW | XFS_IRECLAIMABLE | XFS_IRECLAIM)) + goto out_unlock_noent; + spin_unlock(&ip->i_flags_lock); + /* nothing to sync during shutdown */ if (XFS_FORCED_SHUTDOWN(ip->i_mount)) return EFSCORRUPTED; - /* avoid new or reclaimable inodes. Leave for reclaim code to flush */ - if (xfs_iflags_test(ip, XFS_INEW | XFS_IRECLAIMABLE | XFS_IRECLAIM)) - return ENOENT; - /* If we can't grab the inode, it must on it's way to reclaim. */ if (!igrab(inode)) return ENOENT; @@ -72,6 +78,10 @@ xfs_inode_ag_walk_grab( /* inode is valid */ return 0; + +out_unlock_noent: + spin_unlock(&ip->i_flags_lock); + return ENOENT; } STATIC int @@ -98,12 +108,12 @@ restart: int error = 0; int i; - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void **)batch, first_index, XFS_LOOKUP_BATCH); if (!nr_found) { - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); break; } @@ -129,7 +139,7 @@ restart: } /* unlock now we've grabbed the inodes. */ - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); for (i = 0; i < nr_found; i++) { if (!batch[i]) @@ -639,6 +649,9 @@ xfs_reclaim_inode_grab( struct xfs_inode *ip, int flags) { + /* check for stale RCU freed inode */ + if (!ip->i_ino) + return 1; /* * do some unlocked checks first to avoid unnecceary lock traffic. diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index 9fae475..1e3b035 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -80,6 +80,7 @@ xfs_inode_alloc( ASSERT(atomic_read(&ip->i_pincount) == 0); ASSERT(!spin_is_locked(&ip->i_flags_lock)); ASSERT(completion_done(&ip->i_flush)); + ASSERT(ip->i_ino == 0); mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); lockdep_set_class_and_name(&ip->i_iolock.mr_lock, @@ -98,9 +99,6 @@ xfs_inode_alloc( ip->i_size = 0; ip->i_new_size = 0; - /* prevent anyone from using this yet */ - VFS_I(ip)->i_state = I_NEW; - return ip; } @@ -159,6 +157,16 @@ xfs_inode_free( ASSERT(!spin_is_locked(&ip->i_flags_lock)); ASSERT(completion_done(&ip->i_flush)); + /* + * Because we use RCU freeing we need to ensure the inode always + * appears to be reclaimed with an invalid inode number when in the + * free state. The ip->i_flags_lock provides the barrier against lookup + * races. + */ + spin_lock(&ip->i_flags_lock); + ip->i_flags = XFS_IRECLAIM; + ip->i_ino = 0; + spin_unlock(&ip->i_flags_lock); call_rcu((struct rcu_head *)&VFS_I(ip)->i_dentry, __xfs_inode_free); } @@ -169,14 +177,32 @@ static int xfs_iget_cache_hit( struct xfs_perag *pag, struct xfs_inode *ip, + xfs_ino_t ino, int flags, - int lock_flags) __releases(pag->pag_ici_lock) + int lock_flags) __releases(RCU) { struct inode *inode = VFS_I(ip); struct xfs_mount *mp = ip->i_mount; int error; + /* + * check for re-use of an inode within an RCU grace period due to the + * radix tree nodes not being updated yet. We monitor for this by + * setting the inode number to zero before freeing the inode structure. + * If the inode has been reallocated and set up, then the inode number + * will not match, so check for that, too. + */ spin_lock(&ip->i_flags_lock); + if (ip->i_ino != ino) { + trace_xfs_iget_skip(ip); + XFS_STATS_INC(xs_ig_frecycle); + spin_unlock(&ip->i_flags_lock); + rcu_read_unlock(); + /* Expire the grace period so we don't trip over it again. */ + synchronize_rcu(); + return EAGAIN; + } + /* * If we are racing with another cache hit that is currently @@ -219,7 +245,7 @@ xfs_iget_cache_hit( ip->i_flags |= XFS_IRECLAIM; spin_unlock(&ip->i_flags_lock); - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); error = -inode_init_always(mp->m_super, inode); if (error) { @@ -227,7 +253,7 @@ xfs_iget_cache_hit( * Re-initializing the inode failed, and we are in deep * trouble. Try to re-add it to the reclaim list. */ - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); spin_lock(&ip->i_flags_lock); ip->i_flags &= ~XFS_INEW; @@ -261,7 +287,7 @@ xfs_iget_cache_hit( /* We've got a live one. */ spin_unlock(&ip->i_flags_lock); - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); trace_xfs_iget_hit(ip); } @@ -275,7 +301,7 @@ xfs_iget_cache_hit( out_error: spin_unlock(&ip->i_flags_lock); - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); return error; } @@ -397,7 +423,7 @@ xfs_iget( xfs_agino_t agino; /* reject inode numbers outside existing AGs */ - if (XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) + if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) return EINVAL; /* get the perag structure and ensure that it's inode capable */ @@ -406,15 +432,15 @@ xfs_iget( again: error = 0; - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); ip = radix_tree_lookup(&pag->pag_ici_root, agino); if (ip) { - error = xfs_iget_cache_hit(pag, ip, flags, lock_flags); + error = xfs_iget_cache_hit(pag, ip, ino, flags, lock_flags); if (error) goto out_error_or_again; } else { - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); XFS_STATS_INC(xs_ig_missed); error = xfs_iget_cache_miss(mp, pag, tp, ino, &ip, diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 108c7a0..43ffd90 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -2000,17 +2000,33 @@ xfs_ifree_cluster( */ for (i = 0; i < ninodes; i++) { retry: - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); ip = radix_tree_lookup(&pag->pag_ici_root, XFS_INO_TO_AGINO(mp, (inum + i))); - /* Inode not in memory or stale, nothing to do */ - if (!ip || xfs_iflags_test(ip, XFS_ISTALE)) { - read_unlock(&pag->pag_ici_lock); + /* Inode not in memory, nothing to do */ + if (!ip) { + rcu_read_unlock(); continue; } /* + * because this is an RCU protected lookup, we could + * find a recently freed or even reallocated inode + * during the lookup. We need to check under the + * i_flags_lock for a valid inode here. Skip it if it + * is not valid, the wrong inode or stale. + */ + spin_lock(&ip->i_flags_lock); + if (ip->i_ino != inum + i || + __xfs_iflags_test(ip, XFS_ISTALE)) { + spin_unlock(&ip->i_flags_lock); + rcu_read_unlock(); + continue; + } + spin_unlock(&ip->i_flags_lock); + + /* * Don't try to lock/unlock the current inode, but we * _cannot_ skip the other inodes that we did not find * in the list attached to the buffer and are not @@ -2019,11 +2035,11 @@ retry: */ if (ip != free_ip && !xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); delay(1); goto retry; } - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); xfs_iflock(ip); xfs_iflags_set(ip, XFS_ISTALE); @@ -2629,7 +2645,7 @@ xfs_iflush_cluster( mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1); first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask; - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); /* really need a gang lookup range call here */ nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)ilist, first_index, inodes_per_cluster); @@ -2640,9 +2656,21 @@ xfs_iflush_cluster( iq = ilist[i]; if (iq == ip) continue; - /* if the inode lies outside this cluster, we're done. */ - if ((XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) - break; + + /* + * because this is an RCU protected lookup, we could find a + * recently freed or even reallocated inode during the lookup. + * We need to check under the i_flags_lock for a valid inode + * here. Skip it if it is not valid or the wrong inode. + */ + spin_lock(&ip->i_flags_lock); + if (!ip->i_ino || + (XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) { + spin_unlock(&ip->i_flags_lock); + continue; + } + spin_unlock(&ip->i_flags_lock); + /* * Do an un-protected check to see if the inode is dirty and * is a candidate for flushing. These checks will be repeated @@ -2692,7 +2720,7 @@ xfs_iflush_cluster( } out_free: - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); kmem_free(ilist); out_put: xfs_perag_put(pag); @@ -2704,7 +2732,7 @@ cluster_corrupt_out: * Corruption detected in the clustering loop. Invalidate the * inode buffer and shut down the filesystem. */ - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); /* * Clean up the buffer. If it was B_DELWRI, just release it -- * brelse can handle it with no problems. If not, shut down the -- 1.7.2.3 From SRS0+Wbf7+16+fromorbit.com=dave@internode.on.net Sun Dec 12 19:33:09 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD1X9Jn148789 for ; Sun, 12 Dec 2010 19:33:09 -0600 X-ASG-Debug-ID: 1292204099-0be702310000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id BD56A1CBC360 for ; Sun, 12 Dec 2010 17:34:59 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id pX4pS3cIjqB5HWyi for ; Sun, 12 Dec 2010 17:34:59 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49105785-1927428 for multiple; Mon, 13 Dec 2010 12:04:41 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PRxJI-0001mj-DH; Mon, 13 Dec 2010 12:34:40 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PRxHe-00048f-Si; Mon, 13 Dec 2010 12:32:58 +1100 From: Dave Chinner To: xfs@oss.sgi.com Cc: paulmck@linux.vnet.ibm.com, eric.dumazet@gmail.com X-ASG-Orig-Subj: [PATCH 0/2] xfs: RCU inode freeing and lookups V3 Subject: [PATCH 0/2] xfs: RCU inode freeing and lookups V3 Date: Mon, 13 Dec 2010 12:32:34 +1100 Message-Id: <1292203957-15819-1-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292204100 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49261 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This series converts the XFS inode cache to use RCU freeing for freeing of the inodes and uses RCU locking for all the lookups. It uses the ip->i_ino values and ip->i_flags & XFS_IRECLAIM being checked under the ip->i_flags_lock to detect inodes that have been freed during lookups. Version 3: - add patch for specific RCU freeing of inodes rather than relying on an external tree to provide RCU freeing functionality. This uses standard RCU freeing mechanisms rather than SLAB_DESTROY_BY_RCU. This is kept as a separate patch to minimise the merge conflict issues that may arise if the change is made through VFS code first. - Drop specific references to SLAB_DESTROY_BY_RCU, but keep all the lookup guards for reclaimed/reused inodes as they are mostly the same for both methods of RCU inode freeing. Version 2: - check ip->i_ino under i_flags lock on cache hit - remove duplicate ip->i_ino == 0 check in xfs_dqrele_inode - Fixed inode cluster walks to check for valid i_ino under i_flags_lock. - Fixed ag walk lookups to check i_ino under i_flags_lock. From lmcilroy@redhat.com Sun Dec 12 19:41:35 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_32, J_CHICKENPOX_33 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD1fZvf149097 for ; Sun, 12 Dec 2010 19:41:35 -0600 X-ASG-Debug-ID: 1292204605-305f00800000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx4-phx2.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3EEDB1CBC39A for ; Sun, 12 Dec 2010 17:43:25 -0800 (PST) Received: from mx4-phx2.redhat.com (mx4-phx2.redhat.com [209.132.183.25]) by cuda.sgi.com with ESMTP id Va2ZhS1OmCQGEquU for ; Sun, 12 Dec 2010 17:43:25 -0800 (PST) Received: from mail05.corp.redhat.com (zmail05.collab.prod.int.phx2.redhat.com [10.5.5.46]) by mx4-phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oBD1hBbV008322; Sun, 12 Dec 2010 20:43:11 -0500 Date: Sun, 12 Dec 2010 20:43:11 -0500 (EST) From: Lachlan McIlroy Reply-To: Lachlan McIlroy To: Dave Chinner Cc: xfs@oss.sgi.com, Christoph Hellwig Message-ID: <1853857220.660151292204591887.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> In-Reply-To: <996570405.660111292204469269.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> X-ASG-Orig-Subj: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Subject: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [10.5.5.71] X-Mailer: Zimbra 5.0.21_GA_3150.RHEL4_64 (ZimbraWebClient - FF3.0 (Linux)/5.0.21_GA_3150.RHEL4_64) X-Barracuda-Connect: mx4-phx2.redhat.com[209.132.183.25] X-Barracuda-Start-Time: 1292204606 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49261 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean ----- "Dave Chinner" wrote: > On Fri, Dec 10, 2010 at 08:29:35AM -0500, Christoph Hellwig wrote: > > On Fri, Dec 03, 2010 at 03:38:46PM +1100, Dave Chinner wrote: > > > FWIW, while these macros are the best way to make a simple > backport > > > is possible, I just discovered that mainline has a %pV format > > > operator that allows an implementation like: > > > > > > void > > > xfs_fs_cmn_err( > > > const char *lvl, > > > struct xfs_mount *mp, > > > const char *fmt, > > > ...) > > > { > > > struct va_format vaf; > > > va_list args; > > > > > > va_start(args, fmt); > > > vaf.fmt = fmt; > > > vaf.va = &args; > > > > > > printk("%sFilesystem %s: %pV", lvl, mp->m_fsname, &vaf); > > > va_end(args); > > > > > > BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); > > > } > > > > With this we can also keep the existing integer-based CE_ values > > and do trivial array lookup. That also avoids having to do a strcmp > for > > every message printed. > > Very true. > > Ok, so how do we want to process for this? I'm happy to drop the > macro-ised patch and only use it as a backportable fix for old > kernels - mainline appears to have a lot more functionality in this > area than even recent distro kernels. Lachlan - is that an > acceptable approach for you? Yes, that works for me. We don't have much choice for RHEL4/5 and there's no reason that should compromise a better solution upstream. > > It seems to me that the above is a much better way to start cleaning > up the mainline code base, in the following way: > > 1. the above patch to remove the local message buffer + > lock. > 2. rationalise all the differences in error reporting down > to a common interface > 3. convert the common interface to use kernel log levels > directly. > > The current trend seems to be to move towards logging interfaces > with the following template: > > {sub_sys}_pr_{level}(priv, fmt, ...) > > Which in this case would give us: > > xfs_pr_debug(struct xfs_mount *mp, char *fmt, ...); > xfs_pr_note(struct xfs_mount *mp, char *fmt, ...); > .... > xfs_pr_alert(struct xfs_mount *mp, char *fmt, ...); > xfs_pr_emergency(struct xfs_mount *mp, char *fmt, ...); > > And a variant for the panic mask tagged version of xfs_pr_alert() > of: > > xfs_pr_alert_tag(struct xfs_mount *mp, int tag, char *fmt, ...); > > I can't see any particular reason for needing to keep the separate > parameter for the log level, nor for keeping all the different > logging variants we currently have. Wont you need to reintroduce the log level parameter when each of these new functions calls the common interface? ie most of the above functions will just be wrappers that convert the function name to a log level. > > I'm open to other ideas on the best way to rationalise all the > logging we currently have - the above is just my current thoughts on > what to do. I'm pushing this out as a proposal for discussion before > I change anything as I don't relish the idea of iterating different > logging APIs through patches... > > Cheers, > > Dave. > > > > > > > -- > Dave Chinner > david@fromorbit.com > > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs From SRS0+BL83+16+fromorbit.com=david@internode.on.net Sun Dec 12 21:42:52 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_32, J_CHICKENPOX_33 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD3gqfi155755 for ; Sun, 12 Dec 2010 21:42:52 -0600 X-ASG-Debug-ID: 1292211880-5fc1035d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9DFDD1E3128 for ; Sun, 12 Dec 2010 19:44:40 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id ewdKzoebVzuYWuWI for ; Sun, 12 Dec 2010 19:44:40 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49119680-1927428 for multiple; Mon, 13 Dec 2010 14:14:23 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PRzKi-0001wr-VT; Mon, 13 Dec 2010 14:44:17 +1100 Date: Mon, 13 Dec 2010 14:44:16 +1100 From: Dave Chinner To: Lachlan McIlroy Cc: xfs@oss.sgi.com, Christoph Hellwig X-ASG-Orig-Subj: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Subject: Re: [PATCH] xfs: prevent NMI timeouts in cmn_err Message-ID: <20101213034416.GD9925@dastard> References: <996570405.660111292204469269.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> <1853857220.660151292204591887.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1853857220.660151292204591887.JavaMail.root@zmail05.collab.prod.int.phx2.redhat.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292211883 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49269 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Sun, Dec 12, 2010 at 08:43:11PM -0500, Lachlan McIlroy wrote: > > ----- "Dave Chinner" wrote: > > > On Fri, Dec 10, 2010 at 08:29:35AM -0500, Christoph Hellwig wrote: > > > On Fri, Dec 03, 2010 at 03:38:46PM +1100, Dave Chinner wrote: > > > > FWIW, while these macros are the best way to make a simple > > backport > > > > is possible, I just discovered that mainline has a %pV format > > > > operator that allows an implementation like: > > > > > > > > void > > > > xfs_fs_cmn_err( > > > > const char *lvl, > > > > struct xfs_mount *mp, > > > > const char *fmt, > > > > ...) > > > > { > > > > struct va_format vaf; > > > > va_list args; > > > > > > > > va_start(args, fmt); > > > > vaf.fmt = fmt; > > > > vaf.va = &args; > > > > > > > > printk("%sFilesystem %s: %pV", lvl, mp->m_fsname, &vaf); > > > > va_end(args); > > > > > > > > BUG_ON(strncmp(lvl, KERN_EMERG, strlen(KERN_EMERG)) == 0); > > > > } > > > > > > With this we can also keep the existing integer-based CE_ values > > > and do trivial array lookup. That also avoids having to do a strcmp > > for > > > every message printed. > > > > Very true. > > > > Ok, so how do we want to process for this? I'm happy to drop the > > macro-ised patch and only use it as a backportable fix for old > > kernels - mainline appears to have a lot more functionality in this > > area than even recent distro kernels. Lachlan - is that an > > acceptable approach for you? > > Yes, that works for me. We don't have much choice for RHEL4/5 and > there's no reason that should compromise a better solution upstream. Ok, I'll get that ball moving... > > It seems to me that the above is a much better way to start cleaning > > up the mainline code base, in the following way: > > > > 1. the above patch to remove the local message buffer + > > lock. > > 2. rationalise all the differences in error reporting down > > to a common interface > > 3. convert the common interface to use kernel log levels > > directly. > > > > The current trend seems to be to move towards logging interfaces > > with the following template: > > > > {sub_sys}_pr_{level}(priv, fmt, ...) > > > > Which in this case would give us: > > > > xfs_pr_debug(struct xfs_mount *mp, char *fmt, ...); > > xfs_pr_note(struct xfs_mount *mp, char *fmt, ...); > > .... > > xfs_pr_alert(struct xfs_mount *mp, char *fmt, ...); > > xfs_pr_emergency(struct xfs_mount *mp, char *fmt, ...); > > > > And a variant for the panic mask tagged version of xfs_pr_alert() > > of: > > > > xfs_pr_alert_tag(struct xfs_mount *mp, int tag, char *fmt, ...); > > > > I can't see any particular reason for needing to keep the separate > > parameter for the log level, nor for keeping all the different > > logging variants we currently have. > > Wont you need to reintroduce the log level parameter when each of these > new functions calls the common interface? Ah, what I meant was that the above xfs_pr_*() functions form the common logging interface, instead of cmn_err, xfs_cmn_err, xfs_fs_cmn_err, etc. So the second step above would be to convert all the existing logging calls to use this, but still using the current cmn_err() back end for the custom XFS log messages. i.e. the callers change API, but they still use the same CE_* levels. > ie most of the above functions > will just be wrappers that convert the function name to a log level. The third step is to change the implementation to something like the dev_() printk implementation, or possibly even using the pr_ macros directly via creative abuse of the pr_fmt() macro. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+Gu6A+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:32:12 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4WCFd158200 for ; Sun, 12 Dec 2010 22:32:12 -0600 X-ASG-Debug-ID: 1292214841-63bb02b90000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8B37B143FE32 for ; Sun, 12 Dec 2010 20:34:01 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id 0uNJp55QPV2c02Xj for ; Sun, 12 Dec 2010 20:34:01 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49888021-1927428 for ; Mon, 13 Dec 2010 15:04:01 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS06p-000217-OL for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:33:59 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS05L-0004iY-L0 for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:32:27 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 5/9] xfs: reduce the number of AIL push wakeups Subject: [PATCH 5/9] xfs: reduce the number of AIL push wakeups Date: Mon, 13 Dec 2010 15:32:19 +1100 Message-Id: <1292214743-18073-6-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292214743-18073-1-git-send-email-david@fromorbit.com> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292214843 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49272 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The xfaild often tries to rest to wait for congestion to pass of for IO to complete, but is regularly woken in tail-pushing situations. In severe cases, the xfsaild is getting woken tens of thousands of times a second. Reduce the number needless wakeups by only waking the xfsaild if the new target is larger than the old one. Further make short sleeps uninterruptible as they occur when the xfsaild has decided it needs to back off to allow some IO to complete and being woken early is counter-productive. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_super.c | 20 ++++++++++++++++---- 1 files changed, 16 insertions(+), 4 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index abcda07..b49ad02 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -834,8 +834,11 @@ xfsaild_wakeup( struct xfs_ail *ailp, xfs_lsn_t threshold_lsn) { - ailp->xa_target = threshold_lsn; - wake_up_process(ailp->xa_task); + /* only ever move the target forwards */ + if (XFS_LSN_CMP(threshold_lsn, ailp->xa_target) > 0) { + ailp->xa_target = threshold_lsn; + wake_up_process(ailp->xa_task); + } } STATIC int @@ -847,8 +850,17 @@ xfsaild( long tout = 0; /* milliseconds */ while (!kthread_should_stop()) { - schedule_timeout_interruptible(tout ? - msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT); + /* + * for short sleeps indicating congestion, don't allow us to + * get woken early. Otherwise all we do is bang on the AIL lock + * without making progress. + */ + if (tout && tout <= 20) + __set_current_state(TASK_KILLABLE); + else + __set_current_state(TASK_UNINTERRUPTIBLE); + schedule_timeout(tout ? + msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT); /* swsusp */ try_to_freeze(); -- 1.7.2.3 From SRS0+Gu6A+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:32:12 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4WCsP158201 for ; Sun, 12 Dec 2010 22:32:12 -0600 X-ASG-Debug-ID: 1292214841-63ba02a20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 84748143FE2E for ; Sun, 12 Dec 2010 20:34:01 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id Xq8c7gkvGagptflV for ; Sun, 12 Dec 2010 20:34:01 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49888020-1927428 for ; Mon, 13 Dec 2010 15:04:00 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS06p-00021E-VC for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:33:59 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS05L-0004ii-Rv for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:32:27 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 9/9] xfs: use AIL bulk delete function to implement single delete Subject: [PATCH 9/9] xfs: use AIL bulk delete function to implement single delete Date: Mon, 13 Dec 2010 15:32:23 +1100 Message-Id: <1292214743-18073-10-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292214743-18073-1-git-send-email-david@fromorbit.com> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292214843 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49272 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner We now have two copies of AIL delete operations that are mostly duplicate functionality. The single log item deletes can be implemented via the bulk updates by turning xfs_trans_ail_delete() into a simple wrapper. This removes all the duplicate delete functionality and associated helpers. Signed-off-by: Dave Chinner --- fs/xfs/xfs_trans_ail.c | 65 ----------------------------------------------- fs/xfs/xfs_trans_priv.h | 20 +++++++++----- 2 files changed, 13 insertions(+), 72 deletions(-) diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index 8481a5a..c5bbbc4 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -523,70 +523,6 @@ xfs_trans_ail_update_bulk( } /* - * Delete the given item from the AIL. It must already be in - * the AIL. - * - * Wakeup anyone with an lsn less than item's lsn. If the item - * we delete in the AIL is the minimum one, update the tail lsn in the - * log manager. - * - * Clear the IN_AIL flag from the item, reset its lsn to 0, and - * bump the AIL's generation count to indicate that the tree - * has changed. - * - * This function must be called with the AIL lock held. The lock - * is dropped before returning. - */ -void -xfs_trans_ail_delete( - struct xfs_ail *ailp, - xfs_log_item_t *lip) __releases(ailp->xa_lock) -{ - xfs_log_item_t *mlip; - xfs_lsn_t tail_lsn; - - if (lip->li_flags & XFS_LI_IN_AIL) { - mlip = xfs_ail_min(ailp); - xfs_ail_delete(ailp, lip); - - - lip->li_flags &= ~XFS_LI_IN_AIL; - lip->li_lsn = 0; - - if (mlip == lip) { - mlip = xfs_ail_min(ailp); - /* - * It is not safe to access mlip after the AIL lock - * is dropped, so we must get a copy of li_lsn - * before we do so. This is especially important - * on 32-bit platforms where accessing and updating - * 64-bit values like li_lsn is not atomic. - */ - tail_lsn = mlip ? mlip->li_lsn : 0; - spin_unlock(&ailp->xa_lock); - xfs_log_move_tail(ailp->xa_mount, tail_lsn); - } else { - spin_unlock(&ailp->xa_lock); - } - } - else { - /* - * If the file system is not being shutdown, we are in - * serious trouble if we get to this stage. - */ - struct xfs_mount *mp = ailp->xa_mount; - - spin_unlock(&ailp->xa_lock); - if (!XFS_FORCED_SHUTDOWN(mp)) { - xfs_cmn_err(XFS_PTAG_AILDELETE, CE_ALERT, mp, - "%s: attempting to delete a log item that is not in the AIL", - __func__); - xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); - } - } -} - -/* * xfs_trans_ail_delete_bulk - remove multiple log items from the AIL * * @xfs_trans_ail_delete_bulk takes an array of log items that all need to @@ -660,7 +596,6 @@ xfs_trans_ail_delete_bulk( xfs_log_move_tail(ailp->xa_mount, tail_lsn); } - /* * The active item list (AIL) is a doubly linked list of log * items sorted by ascending lsn. The base of the list is diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h index 95c95b6..a252469 100644 --- a/fs/xfs/xfs_trans_priv.h +++ b/fs/xfs/xfs_trans_priv.h @@ -89,13 +89,19 @@ xfs_trans_ail_update( xfs_trans_ail_update_bulk(ailp, log_items, 1, lsn); } -void xfs_trans_ail_delete(struct xfs_ail *ailp, - struct xfs_log_item *lip) - __releases(ailp->xa_lock); -void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp, - struct xfs_log_item **log_items, - int nr_items) - __releases(ailp->xa_lock); +void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp, + struct xfs_log_item **log_items, int nr_items) + __releases(ailp->xa_lock); +static inline void +xfs_trans_ail_delete( + struct xfs_ail *ailp, + xfs_log_item_t *lip) __releases(ailp->xa_lock) +{ + struct xfs_log_item *log_items[1] = { lip, }; + + xfs_trans_ail_delete_bulk(ailp, log_items, 1); +} + void xfs_trans_ail_push(struct xfs_ail *, xfs_lsn_t); void xfs_trans_unlocked_item(struct xfs_ail *, xfs_log_item_t *); -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:32:21 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_64 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4WLc5158230 for ; Sun, 12 Dec 2010 22:32:21 -0600 X-ASG-Debug-ID: 1292214851-0f4202d20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0A3EC1CBC72C for ; Sun, 12 Dec 2010 20:34:11 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id 1IjGBv077NKXTnj3 for ; Sun, 12 Dec 2010 20:34:11 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49639688-1927428 for ; Mon, 13 Dec 2010 15:04:10 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS06z-00021O-KW for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:34:09 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS05L-0004iS-Ha for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:32:27 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 3/9] xfs: clean up xfs_ail_delete() Subject: [PATCH 3/9] xfs: clean up xfs_ail_delete() Date: Mon, 13 Dec 2010 15:32:17 +1100 Message-Id: <1292214743-18073-4-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292214743-18073-1-git-send-email-david@fromorbit.com> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292214853 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner xfs_ail_delete() has a needlessly complex interface. It returns the log item that was passed in for deletion (which the callers then assert is identical to the one passed in), and callers of xfs_ail_delete() still need to invalidate current traversal cursors. Make xfs_ail_delete() return void, move the cursor invalidation inside it, and clean up the callers just to use the log item pointer they passed in. While cleaning up, remove the messy and unnecessary "/* ARGUSED */" comments around all these functions. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_trans_ail.c | 27 +++++++-------------------- 1 files changed, 7 insertions(+), 20 deletions(-) diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index dc90695..645928c 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -29,7 +29,7 @@ #include "xfs_error.h" STATIC void xfs_ail_insert(struct xfs_ail *, xfs_log_item_t *); -STATIC xfs_log_item_t * xfs_ail_delete(struct xfs_ail *, xfs_log_item_t *); +STATIC void xfs_ail_delete(struct xfs_ail *, xfs_log_item_t *); STATIC xfs_log_item_t * xfs_ail_min(struct xfs_ail *); STATIC xfs_log_item_t * xfs_ail_next(struct xfs_ail *, xfs_log_item_t *); @@ -468,16 +468,13 @@ xfs_trans_ail_update( xfs_log_item_t *lip, xfs_lsn_t lsn) __releases(ailp->xa_lock) { - xfs_log_item_t *dlip = NULL; xfs_log_item_t *mlip; /* ptr to minimum lip */ xfs_lsn_t tail_lsn; mlip = xfs_ail_min(ailp); if (lip->li_flags & XFS_LI_IN_AIL) { - dlip = xfs_ail_delete(ailp, lip); - ASSERT(dlip == lip); - xfs_trans_ail_cursor_clear(ailp, dlip); + xfs_ail_delete(ailp, lip); } else { lip->li_flags |= XFS_LI_IN_AIL; } @@ -485,7 +482,7 @@ xfs_trans_ail_update( lip->li_lsn = lsn; xfs_ail_insert(ailp, lip); - if (mlip == dlip) { + if (mlip == lip) { mlip = xfs_ail_min(ailp); /* * It is not safe to access mlip after the AIL lock is @@ -524,21 +521,18 @@ xfs_trans_ail_delete( struct xfs_ail *ailp, xfs_log_item_t *lip) __releases(ailp->xa_lock) { - xfs_log_item_t *dlip; xfs_log_item_t *mlip; xfs_lsn_t tail_lsn; if (lip->li_flags & XFS_LI_IN_AIL) { mlip = xfs_ail_min(ailp); - dlip = xfs_ail_delete(ailp, lip); - ASSERT(dlip == lip); - xfs_trans_ail_cursor_clear(ailp, dlip); + xfs_ail_delete(ailp, lip); lip->li_flags &= ~XFS_LI_IN_AIL; lip->li_lsn = 0; - if (mlip == dlip) { + if (mlip == lip) { mlip = xfs_ail_min(ailp); /* * It is not safe to access mlip after the AIL lock @@ -632,7 +626,6 @@ STATIC void xfs_ail_insert( struct xfs_ail *ailp, xfs_log_item_t *lip) -/* ARGSUSED */ { xfs_log_item_t *next_lip; @@ -661,18 +654,14 @@ xfs_ail_insert( /* * Delete the given item from the AIL. Return a pointer to the item. */ -/*ARGSUSED*/ -STATIC xfs_log_item_t * +STATIC void xfs_ail_delete( struct xfs_ail *ailp, xfs_log_item_t *lip) -/* ARGSUSED */ { xfs_ail_check(ailp, lip); - list_del(&lip->li_ail); - - return lip; + xfs_trans_ail_cursor_clear(ailp, lip); } /* @@ -682,7 +671,6 @@ xfs_ail_delete( STATIC xfs_log_item_t * xfs_ail_min( struct xfs_ail *ailp) -/* ARGSUSED */ { if (list_empty(&ailp->xa_ail)) return NULL; @@ -699,7 +687,6 @@ STATIC xfs_log_item_t * xfs_ail_next( struct xfs_ail *ailp, xfs_log_item_t *lip) -/* ARGSUSED */ { if (lip->li_ail.next == &ailp->xa_ail) return NULL; -- 1.7.2.3 From SRS0+hhRK+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:32:22 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.9 required=5.0 tests=BAYES_00,LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4WMB7158242 for ; Sun, 12 Dec 2010 22:32:22 -0600 X-ASG-Debug-ID: 1292214851-0f3d02e00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 923CA1CBC730 for ; Sun, 12 Dec 2010 20:34:12 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id Qmn0TOePX5VUQgdi for ; Sun, 12 Dec 2010 20:34:12 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49483524-1927428 for ; Mon, 13 Dec 2010 15:04:11 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS06p-000211-HU for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:33:59 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS05L-0004iN-Dd for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:32:27 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 1/9] xfs: fix EFI transaction cancellation. Subject: [PATCH 1/9] xfs: fix EFI transaction cancellation. Date: Mon, 13 Dec 2010 15:32:15 +1100 Message-Id: <1292214743-18073-2-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292214743-18073-1-git-send-email-david@fromorbit.com> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1292214853 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner XFS_EFI_CANCELED has not been set in the code base since xfs_efi_cancel() was removed back in 2006 by commit 065d312e15902976d256ddaf396a7950ec0350a8 ("[XFS] Remove unused iop_abort log item operation), and even then xfs_efi_cancel() was never called. I haven't tracked it back further than that (beyond git history), but it indicates that the handling of EFIs in cancelled transactions has been broken for a long time. Basically, when we get an IOP_UNPIN(lip, 1); call from xfs_trans_uncommit() (i.e. remove == 1), if we don't free the log item descriptor we leak it. Fix the behviour to be correct and kill the XFS_EFI_CANCELED flag. Signed-off-by: Dave Chinner --- fs/xfs/xfs_extfree_item.c | 20 +++++++++----------- fs/xfs/xfs_extfree_item.h | 1 - 2 files changed, 9 insertions(+), 12 deletions(-) diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c index a55e687..5997efa 100644 --- a/fs/xfs/xfs_extfree_item.c +++ b/fs/xfs/xfs_extfree_item.c @@ -99,10 +99,11 @@ xfs_efi_item_pin( } /* - * While EFIs cannot really be pinned, the unpin operation is the - * last place at which the EFI is manipulated during a transaction. - * Here we coordinate with xfs_efi_cancel() to determine who gets to - * free the EFI. + * While EFIs cannot really be pinned, the unpin operation is the last place at + * which the EFI is manipulated during a transaction. If we are being asked to + * remove the EFI it's because the transaction has been cancelled and by + * definition that means the EFI cannot be in the AIL so remove it from the + * transaction and free it. */ STATIC void xfs_efi_item_unpin( @@ -113,17 +114,14 @@ xfs_efi_item_unpin( struct xfs_ail *ailp = lip->li_ailp; spin_lock(&ailp->xa_lock); - if (efip->efi_flags & XFS_EFI_CANCELED) { - if (remove) - xfs_trans_del_item(lip); - - /* xfs_trans_ail_delete() drops the AIL lock. */ - xfs_trans_ail_delete(ailp, lip); + if (remove) { + ASSERT(!(lip->li_flags & XFS_LI_IN_AIL)); + xfs_trans_del_item(lip); xfs_efi_item_free(efip); } else { efip->efi_flags |= XFS_EFI_COMMITTED; - spin_unlock(&ailp->xa_lock); } + spin_unlock(&ailp->xa_lock); } /* diff --git a/fs/xfs/xfs_extfree_item.h b/fs/xfs/xfs_extfree_item.h index 0d22c56..f7834ec 100644 --- a/fs/xfs/xfs_extfree_item.h +++ b/fs/xfs/xfs_extfree_item.h @@ -115,7 +115,6 @@ typedef struct xfs_efd_log_format_64 { */ #define XFS_EFI_RECOVERED 0x1 #define XFS_EFI_COMMITTED 0x2 -#define XFS_EFI_CANCELED 0x4 /* * This is the "extent free intention" log item. It is used -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:32:22 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=BAYES_00,LOCALPART_IN_SUBJECT autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4WMT0158240 for ; Sun, 12 Dec 2010 22:32:22 -0600 X-ASG-Debug-ID: 1292214851-22ce01b30000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 5B8AE1CBC72F for ; Sun, 12 Dec 2010 20:34:12 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id uGmtFRZzUBLIAOUC for ; Sun, 12 Dec 2010 20:34:12 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 38255308-1927428 for ; Mon, 13 Dec 2010 15:04:11 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS06p-000210-GW for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:33:59 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS05L-0004iL-Bv for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:32:27 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: xfs: AIL lock contention reduction V3 Subject: xfs: AIL lock contention reduction V3 Date: Mon, 13 Dec 2010 15:32:14 +1100 Message-Id: <1292214743-18073-1-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292214853 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.02 X-Barracuda-Spam-Status: No, SCORE=-1.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=LOCALPART_IN_SUBJECT, LOCALPART_IN_SUBJECT_2 X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 LOCALPART_IN_SUBJECT Local part of To: address appears in Subject 1.00 LOCALPART_IN_SUBJECT_2 Local part of To: address appears in Subject X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This series reduces AIL locking overhead by introducing bulk operations for insert and delete. With delayed logging, we can be doing insert operations on thousands of items at a time, so using a bulk operation to reduce AIL lock traffic is a major win in terms of reducing contention on the lock. Similarly, when we have inode buffer IO completion running on multiple CPUs at once, the AIl lock contention from each individual AIL removal is significant. By batching all the inodes on the buffer to be removed from the AIL in a single bulk operation, contention on the AIL is reduced by an order of magnitude. Finally, there is a modification to the xfsaild wakeup code to prevent too many wakeups when the xfsaild is pausing waiting for some work to complete. This prevents an excessive number of AIL scanning traversals by the xfsaild when tail pushing is backing off and waiting for some IO to complete. In combination, these modification reduce AIL lock contention sufficiently to drop the AIL lock out of the "top 10" contended locks on 8-way fs_mark and dbench workloads. Version 3: - split XFS_EFI_CANCELED fixup into separate patch - initialised efi_next_extent correctly - converted XFS_EFI_RECOVERED to use correct bit set/clear operations - removed unneeded clearing of XFS_EFI_COMMITTED in recovery. - added helper for freeing an EFI. - cleaned up log item array variable naming. - cleaned up bulk AIL operation comments. Version 2: - split out stale inode AIL insertion bug fix - split bulk AIL insertion into multiple patches - EFI/EFD handling changes - stale inode AIL insertion bug fix - simplify code calling xfs_ail_delete - bulk ail insertion modifications - use atomic_inc_return for extent recording in xfs_trans_log_efi_extent() - modified AIL sleep code to explicitly set task state as suggested by Christoph. - split AIL bulk deletion into two patches - buffer iodone callback modifications - bulk AIL deletion and inode iodone callback mods. - removed lip parameter from xfs_buf_do_callbacks() as the loop fetches it from the buffer anyway. - fixed unused variable warning in xfs_buf_do_callbacks(). - added two new patches to reduce code duplication - use AIL bulk insertion function to implement single updates - use AIL bulk delete function to implement single deletes From SRS0+w8Wj+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:32:22 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4WL1i158232 for ; Sun, 12 Dec 2010 22:32:22 -0600 X-ASG-Debug-ID: 1292214851-76f003ac0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 367531E2D06 for ; Sun, 12 Dec 2010 20:34:11 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id KZ7VxVosiz2iRfYg for ; Sun, 12 Dec 2010 20:34:11 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 4435327-1927428 for ; Mon, 13 Dec 2010 15:04:11 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS06z-000214-La for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:34:09 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS05L-0004iV-JI for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:32:27 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 4/9] xfs: bulk AIL insertion during transaction commit Subject: [PATCH 4/9] xfs: bulk AIL insertion during transaction commit Date: Mon, 13 Dec 2010 15:32:18 +1100 Message-Id: <1292214743-18073-5-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292214743-18073-1-git-send-email-david@fromorbit.com> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292214853 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner When inserting items into the AIL from the transaction committed callbacks, we take the AIL lock for every single item that is to be inserted. For a CIL checkpoint commit, this can be tens of thousands of individual inserts, yet almost all of the items will be inserted at the same point in the AIL because they have the same index. To reduce the overhead and contention on the AIL lock for such operations, introduce a "bulk insert" operation which allows a list of log items with the same LSN to be inserted in a single operation via a list splice. To do this, we need to pre-sort the log items being committed into a temporary list for insertion. The complexity is that not every log item will end up with the same LSN, and not every item is actually inserted into the AIL. Items that don't match the commit LSN will be inserted and unpinned as per the current one-at-a-time method (relatively rare), while items that are not to be inserted will be unpinned and freed immediately. Items that are to be inserted at the given commit lsn are placed in a temporary array and inserted into the AIL in bulk each time the array fills up. As a result of this, we trade off AIL hold time for a significant reduction in traffic. lock_stat output shows that the worst case hold time is unchanged, but contention from AIL inserts drops by an order of magnitude and the number of lock traversal decreases significantly. Signed-off-by: Dave Chinner --- fs/xfs/xfs_log_cil.c | 9 +--- fs/xfs/xfs_trans.c | 80 +++++++++++++++++++++++++++++++++++- fs/xfs/xfs_trans_ail.c | 105 +++++++++++++++++++++++++++++++++++++++++++++++ fs/xfs/xfs_trans_priv.h | 10 ++++- 4 files changed, 194 insertions(+), 10 deletions(-) diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c index 23d6ceb..f36f1a2 100644 --- a/fs/xfs/xfs_log_cil.c +++ b/fs/xfs/xfs_log_cil.c @@ -361,15 +361,10 @@ xlog_cil_committed( int abort) { struct xfs_cil_ctx *ctx = args; - struct xfs_log_vec *lv; - int abortflag = abort ? XFS_LI_ABORTED : 0; struct xfs_busy_extent *busyp, *n; - /* unpin all the log items */ - for (lv = ctx->lv_chain; lv; lv = lv->lv_next ) { - xfs_trans_item_committed(lv->lv_item, ctx->start_lsn, - abortflag); - } + xfs_trans_committed_bulk(ctx->cil->xc_log->l_ailp, ctx->lv_chain, + ctx->start_lsn, abort); list_for_each_entry_safe(busyp, n, &ctx->busy_extents, list) xfs_alloc_busy_clear(ctx->cil->xc_log->l_mp, busyp); diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index 8139a2e..b0fff07 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -1347,7 +1347,7 @@ xfs_trans_fill_vecs( * they could be immediately flushed and we'd have to race with the flusher * trying to pull the item from the AIL as we add it. */ -void +static void xfs_trans_item_committed( struct xfs_log_item *lip, xfs_lsn_t commit_lsn, @@ -1422,6 +1422,84 @@ xfs_trans_committed( xfs_trans_free(tp); } +static inline void +xfs_log_item_batch_insert( + struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items, + xfs_lsn_t commit_lsn) +{ + int i; + + spin_lock(&ailp->xa_lock); + /* xfs_trans_ail_update_bulk drops ailp->xa_lock */ + xfs_trans_ail_update_bulk(ailp, log_items, nr_items, commit_lsn); + + for (i = 0; i < nr_items; i++) + IOP_UNPIN(log_items[i], 0); +} + +/* + * Bulk operation version of xfs_trans_committed that takes a log vector of + * items to insert into the AIL. This uses bulk AIL insertion techniques to + * minimise lock traffic. + */ +void +xfs_trans_committed_bulk( + struct xfs_ail *ailp, + struct xfs_log_vec *log_vector, + xfs_lsn_t commit_lsn, + int aborted) +{ +#define LOG_ITEM_BATCH_SIZE 32 + struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; + struct xfs_log_vec *lv; + int i = 0; + + /* unpin all the log items */ + for (lv = log_vector; lv; lv = lv->lv_next ) { + struct xfs_log_item *lip = lv->lv_item; + xfs_lsn_t item_lsn; + + if (aborted) + lip->li_flags |= XFS_LI_ABORTED; + item_lsn = IOP_COMMITTED(lip, commit_lsn); + + /* item_lsn of -1 means the item was freed */ + if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) + continue; + + if (item_lsn != commit_lsn) { + + /* + * Not a bulk update option due to unusual item_lsn. + * Push into AIL immediately, rechecking the lsn once + * we have the ail lock. Then unpin the item. + */ + spin_lock(&ailp->xa_lock); + if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) { + xfs_trans_ail_update(ailp, lip, item_lsn); + } else { + spin_unlock(&ailp->xa_lock); + } + IOP_UNPIN(lip, 0); + continue; + } + + /* Item is a candidate for bulk AIL insert. */ + log_items[i++] = lv->lv_item; + if (i >= LOG_ITEM_BATCH_SIZE) { + xfs_log_item_batch_insert(ailp, log_items, + LOG_ITEM_BATCH_SIZE, commit_lsn); + i = 0; + } + } + + /* make sure we insert the remainder! */ + if (i) + xfs_log_item_batch_insert(ailp, log_items, i, commit_lsn); +} + /* * Called from the trans_commit code when we notice that * the filesystem is in the middle of a forced shutdown. diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index 645928c..726785f 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -29,6 +29,7 @@ #include "xfs_error.h" STATIC void xfs_ail_insert(struct xfs_ail *, xfs_log_item_t *); +STATIC void xfs_ail_splice(struct xfs_ail *, struct list_head *, xfs_lsn_t); STATIC void xfs_ail_delete(struct xfs_ail *, xfs_log_item_t *); STATIC xfs_log_item_t * xfs_ail_min(struct xfs_ail *); STATIC xfs_log_item_t * xfs_ail_next(struct xfs_ail *, xfs_log_item_t *); @@ -502,6 +503,79 @@ xfs_trans_ail_update( } /* xfs_trans_update_ail */ /* + * xfs_trans_ail_update - bulk AIL insertion operation. + * + * @xfs_trans_ail_update takes an array of log items that all need to be + * positioned at the same LSN in the AIL. If an item is not in the AIL, it will + * be added. Otherwise, it will be repositioned by removing it and re-adding + * it to the AIL. If we move the first item in the AIL, update the log tail to + * match the new minimum LSN in the AIL. + * + * This function takes the AIL lock once to execute the update operations on + * all the items in the array, and as such should not be called with the AIL + * lock held. As a result, once we have the AIL lock, we need to check each log + * item LSN to confirm it needs to be moved forward in the AIL. + * + * To optimise the insert operation, we delete all the items from the AIL in + * the first pass, moving them into a temporary list, then splice the temporary + * list into the correct position in the AIL. This avoids needing to do an + * insert operation on every item. + * + * This function must be called with the AIL lock held. The lock is dropped + * before returning. + */ +void +xfs_trans_ail_update_bulk( + struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items, + xfs_lsn_t lsn) __releases(ailp->xa_lock) +{ + xfs_log_item_t *mlip; + xfs_lsn_t tail_lsn; + int mlip_changed = 0; + int i; + LIST_HEAD(tmp); + + mlip = xfs_ail_min(ailp); + + for (i = 0; i < nr_items; i++) { + struct xfs_log_item *lip = log_items[i]; + if (lip->li_flags & XFS_LI_IN_AIL) { + /* check if we really need to move the item */ + if (XFS_LSN_CMP(lsn, lip->li_lsn) <= 0) + continue; + + xfs_ail_delete(ailp, lip); + if (mlip == lip) + mlip_changed = 1; + } else { + lip->li_flags |= XFS_LI_IN_AIL; + } + lip->li_lsn = lsn; + list_add(&lip->li_ail, &tmp); + } + + xfs_ail_splice(ailp, &tmp, lsn); + + if (!mlip_changed) { + spin_unlock(&ailp->xa_lock); + return; + } + + /* + * It is not safe to access mlip after the AIL lock is dropped, so we + * must get a copy of li_lsn before we do so. This is especially + * important on 32-bit platforms where accessing and updating 64-bit + * values like li_lsn is not atomic. + */ + mlip = xfs_ail_min(ailp); + tail_lsn = mlip->li_lsn; + spin_unlock(&ailp->xa_lock); + xfs_log_move_tail(ailp->xa_mount, tail_lsn); +} + +/* * Delete the given item from the AIL. It must already be in * the AIL. * @@ -652,6 +726,37 @@ xfs_ail_insert( } /* + * splice the log item list into the AIL at the given LSN. + */ +STATIC void +xfs_ail_splice( + struct xfs_ail *ailp, + struct list_head *list, + xfs_lsn_t lsn) +{ + xfs_log_item_t *next_lip; + + /* + * If the list is empty, just insert the item. + */ + if (list_empty(&ailp->xa_ail)) { + list_splice(list, &ailp->xa_ail); + return; + } + + list_for_each_entry_reverse(next_lip, &ailp->xa_ail, li_ail) { + if (XFS_LSN_CMP(next_lip->li_lsn, lsn) <= 0) + break; + } + + ASSERT((&next_lip->li_ail == &ailp->xa_ail) || + (XFS_LSN_CMP(next_lip->li_lsn, lsn) <= 0)); + + list_splice_init(list, &next_lip->li_ail); + return; +} + +/* * Delete the given item from the AIL. Return a pointer to the item. */ STATIC void diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h index 62da86c..e039729 100644 --- a/fs/xfs/xfs_trans_priv.h +++ b/fs/xfs/xfs_trans_priv.h @@ -22,15 +22,17 @@ struct xfs_log_item; struct xfs_log_item_desc; struct xfs_mount; struct xfs_trans; +struct xfs_ail; +struct xfs_log_vec; void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *); void xfs_trans_del_item(struct xfs_log_item *); void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn, int flags); -void xfs_trans_item_committed(struct xfs_log_item *lip, - xfs_lsn_t commit_lsn, int aborted); void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp); +void xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv, + xfs_lsn_t commit_lsn, int aborted); /* * AIL traversal cursor. * @@ -76,6 +78,10 @@ struct xfs_ail { void xfs_trans_ail_update(struct xfs_ail *ailp, struct xfs_log_item *lip, xfs_lsn_t lsn) __releases(ailp->xa_lock); +void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items, xfs_lsn_t lsn) + __releases(ailp->xa_lock); void xfs_trans_ail_delete(struct xfs_ail *ailp, struct xfs_log_item *lip) __releases(ailp->xa_lock); -- 1.7.2.3 From SRS0+hhRK+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:32:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_61 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4WNMJ158261 for ; Sun, 12 Dec 2010 22:32:23 -0600 X-ASG-Debug-ID: 1292214853-716f019b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A2ABB143FE38 for ; Sun, 12 Dec 2010 20:34:13 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id JbAOmSJpKeBDhvoK for ; Sun, 12 Dec 2010 20:34:13 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49483526-1927428 for ; Mon, 13 Dec 2010 15:04:11 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS06z-00021U-Qh for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:34:09 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS05L-0004id-OV for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:32:27 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 7/9] xfs: remove all the inodes on a buffer from the AIL in bulk Subject: [PATCH 7/9] xfs: remove all the inodes on a buffer from the AIL in bulk Date: Mon, 13 Dec 2010 15:32:21 +1100 Message-Id: <1292214743-18073-8-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292214743-18073-1-git-send-email-david@fromorbit.com> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1292214854 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49272 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner When inode buffer IO completes, usually all of the inodes are removed from the AIL. This involves processing them one at a time and taking the AIL lock once for every inode. When all CPUs are processing inode IO completions, this causes excessive amount sof contention on the AIL lock. Instead, change the way we process inode IO completion in the buffer IO done callback. Allow the inode IO done callback to walk the list of IO done callbacks and pull all the inodes off the buffer in one go and then process them as a batch. Once all the inodes for removal are collected, take the AIL lock once and do a bulk removal operation to minimise traffic on the AIL lock. Signed-off-by: Dave Chinner --- fs/xfs/xfs_inode_item.c | 92 ++++++++++++++++++++++++++++++++++++++--------- fs/xfs/xfs_trans_ail.c | 73 +++++++++++++++++++++++++++++++++++++ fs/xfs/xfs_trans_priv.h | 4 ++ 3 files changed, 152 insertions(+), 17 deletions(-) diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c index 7c8d30c..fd4f398 100644 --- a/fs/xfs/xfs_inode_item.c +++ b/fs/xfs/xfs_inode_item.c @@ -842,15 +842,64 @@ xfs_inode_item_destroy( * flushed to disk. It is responsible for removing the inode item * from the AIL if it has not been re-logged, and unlocking the inode's * flush lock. + * + * To reduce AIL lock traffic as much as possible, we scan the buffer log item + * list for other inodes that will run this function. We remove them from the + * buffer list so we can process all the inode IO completions in one AIL lock + * traversal. */ void xfs_iflush_done( struct xfs_buf *bp, struct xfs_log_item *lip) { - struct xfs_inode_log_item *iip = INODE_ITEM(lip); - xfs_inode_t *ip = iip->ili_inode; + struct xfs_inode_log_item *iip; + struct xfs_log_item *blip; + struct xfs_log_item *next; + struct xfs_log_item *prev; struct xfs_ail *ailp = lip->li_ailp; + int need_ail = 0; + + /* + * Scan the buffer IO completions for other inodes being completed and + * attach them to the current inode log item. + */ + blip = XFS_BUF_FSPRIVATE(bp, xfs_log_item_t *); + prev = NULL; + while (blip != NULL) { + if (lip->li_cb != xfs_iflush_done) { + prev = blip; + blip = blip->li_bio_list; + continue; + } + + /* remove from list */ + next = blip->li_bio_list; + if (!prev) { + XFS_BUF_SET_FSPRIVATE(bp, next); + } else { + prev->li_bio_list = next; + } + + /* add to current list */ + blip->li_bio_list = lip->li_bio_list; + lip->li_bio_list = blip; + + /* + * while we have the item, do the unlocked check for needing + * the AIL lock. + */ + iip = INODE_ITEM(blip); + if (iip->ili_logged && blip->li_lsn == iip->ili_flush_lsn) + need_ail++; + + blip = next; + } + + /* make sure we capture the state of the initial inode. */ + iip = INODE_ITEM(lip); + if (iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) + need_ail++; /* * We only want to pull the item from the AIL if it is @@ -861,28 +910,37 @@ xfs_iflush_done( * the lock since it's cheaper, and then we recheck while * holding the lock before removing the inode from the AIL. */ - if (iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) { + if (need_ail) { + struct xfs_log_item *log_items[need_ail]; + int i = 0; spin_lock(&ailp->xa_lock); - if (lip->li_lsn == iip->ili_flush_lsn) { - /* xfs_trans_ail_delete() drops the AIL lock. */ - xfs_trans_ail_delete(ailp, lip); - } else { - spin_unlock(&ailp->xa_lock); + for (blip = lip; blip; blip = blip->li_bio_list) { + iip = INODE_ITEM(blip); + if (iip->ili_logged && + blip->li_lsn == iip->ili_flush_lsn) { + log_items[i++] = blip; + } + ASSERT(i <= need_ail); } + /* xfs_trans_ail_delete_bulk() drops the AIL lock. */ + xfs_trans_ail_delete_bulk(ailp, log_items, i); } - iip->ili_logged = 0; /* - * Clear the ili_last_fields bits now that we know that the - * data corresponding to them is safely on disk. + * clean up and unlock the flush lock now we are done. We can clear the + * ili_last_fields bits now that we know that the data corresponding to + * them is safely on disk. */ - iip->ili_last_fields = 0; + for (blip = lip; blip; blip = next) { + next = blip->li_bio_list; + blip->li_bio_list = NULL; - /* - * Release the inode's flush lock since we're done with it. - */ - xfs_ifunlock(ip); + iip = INODE_ITEM(blip); + iip->ili_logged = 0; + iip->ili_last_fields = 0; + xfs_ifunlock(iip->ili_inode); + } } /* diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index 726785f..a3d8406 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -639,6 +639,79 @@ xfs_trans_ail_delete( } } +/* + * xfs_trans_ail_delete_bulk - remove multiple log items from the AIL + * + * @xfs_trans_ail_delete_bulk takes an array of log items that all need to + * removed from the AIL. The caller is already holding the AIL lock, and done + * all the checks necessary to ensure the items passed in via @log_items are + * ready for deletion. This includes checking that the items are in the AIL. + * + * For each log item to be removed, unlink it from the AIL, clear the IN_AIL + * flag from the item and reset the item's lsn to 0. If we remove the first + * item in the AIL, update the log tail to match the new minimum LSN in the + * AIL. + * + * This function will not drop the AIL lock until all items are removed from + * the AIL to minimise the amount of lock traffic on the AIL. This does not + * greatly increase the AIL hold time, but does significantly reduce the amount + * of traffic on the lock, especially during IO completion. + * + * This function must be called with the AIL lock held. The lock is dropped + * before returning. + */ +void +xfs_trans_ail_delete_bulk( + struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items) __releases(ailp->xa_lock) +{ + xfs_log_item_t *mlip; + xfs_lsn_t tail_lsn; + int mlip_changed = 0; + int i; + + mlip = xfs_ail_min(ailp); + + for (i = 0; i < nr_items; i++) { + struct xfs_log_item *lip = log_items[i]; + if (!(lip->li_flags & XFS_LI_IN_AIL)) { + struct xfs_mount *mp = ailp->xa_mount; + + spin_unlock(&ailp->xa_lock); + if (!XFS_FORCED_SHUTDOWN(mp)) { + xfs_cmn_err(XFS_PTAG_AILDELETE, CE_ALERT, mp, + "%s: attempting to delete a log item that is not in the AIL", + __func__); + xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); + } + return; + } + + xfs_ail_delete(ailp, lip); + lip->li_flags &= ~XFS_LI_IN_AIL; + lip->li_lsn = 0; + if (mlip == lip) + mlip_changed = 1; + } + + if (!mlip_changed) { + spin_unlock(&ailp->xa_lock); + return; + } + + /* + * It is not safe to access mlip after the AIL lock is dropped, so we + * must get a copy of li_lsn before we do so. This is especially + * important on 32-bit platforms where accessing and updating 64-bit + * values like li_lsn is not atomic. It is possible we've emptied the + * AIL here, so if that is the case, pass an LSN of 0 to the tail move. + */ + mlip = xfs_ail_min(ailp); + tail_lsn = mlip ? mlip->li_lsn : 0; + spin_unlock(&ailp->xa_lock); + xfs_log_move_tail(ailp->xa_mount, tail_lsn); +} /* diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h index e039729..246ca4d 100644 --- a/fs/xfs/xfs_trans_priv.h +++ b/fs/xfs/xfs_trans_priv.h @@ -85,6 +85,10 @@ void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, void xfs_trans_ail_delete(struct xfs_ail *ailp, struct xfs_log_item *lip) __releases(ailp->xa_lock); +void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items) + __releases(ailp->xa_lock); void xfs_trans_ail_push(struct xfs_ail *, xfs_lsn_t); void xfs_trans_unlocked_item(struct xfs_ail *, xfs_log_item_t *); -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:32:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.9 required=5.0 tests=BAYES_00,LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4WNmX158262 for ; Sun, 12 Dec 2010 22:32:23 -0600 X-ASG-Debug-ID: 1292214851-0f4202d20002-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 902161CBC735 for ; Sun, 12 Dec 2010 20:34:13 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id 1E6hlFkA9nhN9CsN for ; Sun, 12 Dec 2010 20:34:13 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49639689-1927428 for ; Mon, 13 Dec 2010 15:04:11 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS06p-000212-J8 for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:33:59 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS05L-0004iP-Fu for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:32:27 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 2/9] xfs: Pull EFI/EFD handling out from under the AIL lock Subject: [PATCH 2/9] xfs: Pull EFI/EFD handling out from under the AIL lock Date: Mon, 13 Dec 2010 15:32:16 +1100 Message-Id: <1292214743-18073-3-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292214743-18073-1-git-send-email-david@fromorbit.com> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292214854 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner EFI/EFD interactions are protected from races by the AIL lock. They are the only type of log items that require the the AIL lock to serialise internal state, so they need to be separated from the AIL lock before we can do bulk insert operations on the AIL. To acheive this, convert the counter of the number of extents in the EFI to an atomic so it can be safely manipulated by EFD processing without locks. Also, convert the EFI state flag manipulations to use atomic bit operations so no locks are needed to record state changes. Finally, use the state bits to determine when it is safe to free the EFI and clean up the code to do this neatly. Signed-off-by: Dave Chinner --- fs/xfs/xfs_extfree_item.c | 81 ++++++++++++++++++++++++------------------- fs/xfs/xfs_extfree_item.h | 10 +++--- fs/xfs/xfs_log_recover.c | 9 ++--- fs/xfs/xfs_trans_extfree.c | 8 +++- 4 files changed, 60 insertions(+), 48 deletions(-) diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c index 5997efa..3f9f486 100644 --- a/fs/xfs/xfs_extfree_item.c +++ b/fs/xfs/xfs_extfree_item.c @@ -48,6 +48,28 @@ xfs_efi_item_free( } /* + * Freeing the efi requires that we remove it from the AIL if it has already + * been placed there. However, the EFI may not yet have been placed in the AIL + * when called by xfs_efi_release() from EFD processing due to the ordering of + * committed vs unpin operations in bulk insert operations. Hence the + * test_and_clear_bit(XFS_EFI_COMMITTED) to ensure only the last caller frees + * the EFI. + */ +STATIC void +__xfs_efi_release( + struct xfs_efi_log_item *efip) +{ + struct xfs_ail *ailp = efip->efi_item.li_ailp; + + if (!test_and_clear_bit(XFS_EFI_COMMITTED, &efip->efi_flags)) { + spin_lock(&ailp->xa_lock); + /* xfs_trans_ail_delete() drops the AIL lock. */ + xfs_trans_ail_delete(ailp, (xfs_log_item_t *)efip); + xfs_efi_item_free(efip); + } +} + +/* * This returns the number of iovecs needed to log the given efi item. * We only need 1 iovec for an efi item. It just logs the efi_log_format * structure. @@ -74,7 +96,8 @@ xfs_efi_item_format( struct xfs_efi_log_item *efip = EFI_ITEM(lip); uint size; - ASSERT(efip->efi_next_extent == efip->efi_format.efi_nextents); + ASSERT(atomic_read(&efip->efi_next_extent) == + efip->efi_format.efi_nextents); efip->efi_format.efi_type = XFS_LI_EFI; @@ -103,7 +126,8 @@ xfs_efi_item_pin( * which the EFI is manipulated during a transaction. If we are being asked to * remove the EFI it's because the transaction has been cancelled and by * definition that means the EFI cannot be in the AIL so remove it from the - * transaction and free it. + * transaction and free it. Otherwise coordinate with xfs_efi_release() (via + * XFS_EFI_COMMITTED) to determine who gets to free the EFI. */ STATIC void xfs_efi_item_unpin( @@ -111,17 +135,14 @@ xfs_efi_item_unpin( int remove) { struct xfs_efi_log_item *efip = EFI_ITEM(lip); - struct xfs_ail *ailp = lip->li_ailp; - spin_lock(&ailp->xa_lock); if (remove) { ASSERT(!(lip->li_flags & XFS_LI_IN_AIL)); xfs_trans_del_item(lip); xfs_efi_item_free(efip); - } else { - efip->efi_flags |= XFS_EFI_COMMITTED; + return; } - spin_unlock(&ailp->xa_lock); + __xfs_efi_release(efip); } /* @@ -150,16 +171,20 @@ xfs_efi_item_unlock( } /* - * The EFI is logged only once and cannot be moved in the log, so - * simply return the lsn at which it's been logged. The canceled - * flag is not paid any attention here. Checking for that is delayed - * until the EFI is unpinned. + * The EFI is logged only once and cannot be moved in the log, so simply return + * the lsn at which it's been logged. For bulk transaction committed + * processing, the EFI may be processed but not yet unpinned prior to the EFD + * being processed. Set the XFS_EFI_COMMITTED flag so this case can be detected + * when processing the EFD. */ STATIC xfs_lsn_t xfs_efi_item_committed( struct xfs_log_item *lip, xfs_lsn_t lsn) { + struct xfs_efi_log_item *efip = EFI_ITEM(lip); + + set_bit(XFS_EFI_COMMITTED, &efip->efi_flags); return lsn; } @@ -228,6 +253,7 @@ xfs_efi_init( xfs_log_item_init(mp, &efip->efi_item, XFS_LI_EFI, &xfs_efi_item_ops); efip->efi_format.efi_nextents = nextents; efip->efi_format.efi_id = (__psint_t)(void*)efip; + atomic_set(&efip->efi_next_extent, 0); return efip; } @@ -287,37 +313,20 @@ xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt) } /* - * This is called by the efd item code below to release references to - * the given efi item. Each efd calls this with the number of - * extents that it has logged, and when the sum of these reaches - * the total number of extents logged by this efi item we can free - * the efi item. - * - * Freeing the efi item requires that we remove it from the AIL. - * We'll use the AIL lock to protect our counters as well as - * the removal from the AIL. + * This is called by the efd item code below to release references to the given + * efi item. Each efd calls this with the number of extents that it has + * logged, and when the sum of these reaches the total number of extents logged + * by this efi item we can free the efi item. */ void xfs_efi_release(xfs_efi_log_item_t *efip, uint nextents) { - struct xfs_ail *ailp = efip->efi_item.li_ailp; - int extents_left; + ASSERT(atomic_read(&efip->efi_next_extent) >= nextents); + if (!atomic_sub_and_test(nextents, &efip->efi_next_extent)) + return; - ASSERT(efip->efi_next_extent > 0); - ASSERT(efip->efi_flags & XFS_EFI_COMMITTED); - - spin_lock(&ailp->xa_lock); - ASSERT(efip->efi_next_extent >= nextents); - efip->efi_next_extent -= nextents; - extents_left = efip->efi_next_extent; - if (extents_left == 0) { - /* xfs_trans_ail_delete() drops the AIL lock. */ - xfs_trans_ail_delete(ailp, (xfs_log_item_t *)efip); - xfs_efi_item_free(efip); - } else { - spin_unlock(&ailp->xa_lock); - } + __xfs_efi_release(efip); } static inline struct xfs_efd_log_item *EFD_ITEM(struct xfs_log_item *lip) diff --git a/fs/xfs/xfs_extfree_item.h b/fs/xfs/xfs_extfree_item.h index f7834ec..375f68e 100644 --- a/fs/xfs/xfs_extfree_item.h +++ b/fs/xfs/xfs_extfree_item.h @@ -111,10 +111,10 @@ typedef struct xfs_efd_log_format_64 { #define XFS_EFI_MAX_FAST_EXTENTS 16 /* - * Define EFI flags. + * Define EFI flag bits. Manipulated by set/clear/test_bit operators. */ -#define XFS_EFI_RECOVERED 0x1 -#define XFS_EFI_COMMITTED 0x2 +#define XFS_EFI_RECOVERED 1 +#define XFS_EFI_COMMITTED 2 /* * This is the "extent free intention" log item. It is used @@ -124,8 +124,8 @@ typedef struct xfs_efd_log_format_64 { */ typedef struct xfs_efi_log_item { xfs_log_item_t efi_item; - uint efi_flags; /* misc flags */ - uint efi_next_extent; + atomic_t efi_next_extent; + unsigned long efi_flags; /* misc flags */ xfs_efi_log_format_t efi_format; } xfs_efi_log_item_t; diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 966d3f9..e23f7be 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -2717,8 +2717,7 @@ xlog_recover_do_efi_trans( xfs_efi_item_free(efip); return error; } - efip->efi_next_extent = efi_formatp->efi_nextents; - efip->efi_flags |= XFS_EFI_COMMITTED; + atomic_set(&efip->efi_next_extent, efi_formatp->efi_nextents); spin_lock(&log->l_ailp->xa_lock); /* @@ -3011,7 +3010,7 @@ xlog_recover_process_efi( xfs_extent_t *extp; xfs_fsblock_t startblock_fsb; - ASSERT(!(efip->efi_flags & XFS_EFI_RECOVERED)); + ASSERT(!test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)); /* * First check the validity of the extents described by the @@ -3050,7 +3049,7 @@ xlog_recover_process_efi( extp->ext_len); } - efip->efi_flags |= XFS_EFI_RECOVERED; + set_bit(XFS_EFI_RECOVERED, &efip->efi_flags); error = xfs_trans_commit(tp, 0); return error; @@ -3107,7 +3106,7 @@ xlog_recover_process_efis( * Skip EFIs that we've already processed. */ efip = (xfs_efi_log_item_t *)lip; - if (efip->efi_flags & XFS_EFI_RECOVERED) { + if (test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)) { lip = xfs_trans_ail_cursor_next(ailp, &cur); continue; } diff --git a/fs/xfs/xfs_trans_extfree.c b/fs/xfs/xfs_trans_extfree.c index f783d5e..f7590f5 100644 --- a/fs/xfs/xfs_trans_extfree.c +++ b/fs/xfs/xfs_trans_extfree.c @@ -69,12 +69,16 @@ xfs_trans_log_efi_extent(xfs_trans_t *tp, tp->t_flags |= XFS_TRANS_DIRTY; efip->efi_item.li_desc->lid_flags |= XFS_LID_DIRTY; - next_extent = efip->efi_next_extent; + /* + * atomic_inc_return gives us the value after the increment; + * we want to use it as an array index so we need to subtract 1 from + * it. + */ + next_extent = atomic_inc_return(&efip->efi_next_extent) - 1; ASSERT(next_extent < efip->efi_format.efi_nextents); extp = &(efip->efi_format.efi_extents[next_extent]); extp->ext_start = start_block; extp->ext_len = ext_len; - efip->efi_next_extent++; } -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:32:32 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4WVbS158321 for ; Sun, 12 Dec 2010 22:32:31 -0600 X-ASG-Debug-ID: 1292214861-0f3d02e20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E8BE71CBC735 for ; Sun, 12 Dec 2010 20:34:21 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id MBlYizSQdomEaMGs for ; Sun, 12 Dec 2010 20:34:21 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50128060-1927428 for ; Mon, 13 Dec 2010 15:04:20 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS06z-00021P-Ow for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:34:09 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS05L-0004ia-Mk for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:32:27 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 6/9] xfs: consume iodone callback items on buffers as they are processed Subject: [PATCH 6/9] xfs: consume iodone callback items on buffers as they are processed Date: Mon, 13 Dec 2010 15:32:20 +1100 Message-Id: <1292214743-18073-7-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292214743-18073-1-git-send-email-david@fromorbit.com> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292214862 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner To allow buffer iodone callbacks to consume multiple items off the callback list, first we need to convert the xfs_buf_do_callbacks() to consume items and always pull the next item from the head of the list. The means the item list walk is never dependent on knowing the next item on the list and hence allows callbacks to remove items from the list as well. This allows callbacks to do bulk operations by scanning the list for identical callbacks, consuming them all and then processing them in bulk, negating the need for multiple callbacks of that type. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_buf_item.c | 32 +++++++++++++++++++++----------- 1 files changed, 21 insertions(+), 11 deletions(-) diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c index 2686d0d..ed2b65f 100644 --- a/fs/xfs/xfs_buf_item.c +++ b/fs/xfs/xfs_buf_item.c @@ -142,7 +142,7 @@ xfs_buf_item_log_check( #endif STATIC void xfs_buf_error_relse(xfs_buf_t *bp); -STATIC void xfs_buf_do_callbacks(xfs_buf_t *bp, xfs_log_item_t *lip); +STATIC void xfs_buf_do_callbacks(struct xfs_buf *bp); /* * This returns the number of log iovecs needed to log the @@ -450,7 +450,7 @@ xfs_buf_item_unpin( * xfs_trans_ail_delete() drops the AIL lock. */ if (bip->bli_flags & XFS_BLI_STALE_INODE) { - xfs_buf_do_callbacks(bp, (xfs_log_item_t *)bip); + xfs_buf_do_callbacks(bp); XFS_BUF_SET_FSPRIVATE(bp, NULL); XFS_BUF_CLR_IODONE_FUNC(bp); } else { @@ -918,15 +918,26 @@ xfs_buf_attach_iodone( XFS_BUF_SET_IODONE_FUNC(bp, xfs_buf_iodone_callbacks); } +/* + * We can have many callbacks on a buffer. Running the callbacks individually + * can cause a lot of contention on the AIL lock, so we allow for a single + * callback to be able to scan the remaining lip->li_bio_list for other items + * of the same type and callback to be processed in the first call. + * + * As a result, the loop walking the callback list below will also modify the + * list. it removes the first item from the list and then runs the callback. + * The loop then restarts from the new head of the list. This allows the + * callback to scan and modify the list attached to the buffer and we don't + * have to care about maintaining a next item pointer. + */ STATIC void xfs_buf_do_callbacks( - xfs_buf_t *bp, - xfs_log_item_t *lip) + struct xfs_buf *bp) { - xfs_log_item_t *nlip; + struct xfs_log_item *lip; - while (lip != NULL) { - nlip = lip->li_bio_list; + while ((lip = XFS_BUF_FSPRIVATE(bp, xfs_log_item_t *)) != NULL) { + XFS_BUF_SET_FSPRIVATE(bp, lip->li_bio_list); ASSERT(lip->li_cb != NULL); /* * Clear the next pointer so we don't have any @@ -936,7 +947,6 @@ xfs_buf_do_callbacks( */ lip->li_bio_list = NULL; lip->li_cb(bp, lip); - lip = nlip; } } @@ -970,7 +980,7 @@ xfs_buf_iodone_callbacks( ASSERT(XFS_BUF_TARGET(bp) == mp->m_ddev_targp); XFS_BUF_SUPER_STALE(bp); trace_xfs_buf_item_iodone(bp, _RET_IP_); - xfs_buf_do_callbacks(bp, lip); + xfs_buf_do_callbacks(bp); XFS_BUF_SET_FSPRIVATE(bp, NULL); XFS_BUF_CLR_IODONE_FUNC(bp); xfs_buf_ioend(bp, 0); @@ -1029,7 +1039,7 @@ xfs_buf_iodone_callbacks( return; } - xfs_buf_do_callbacks(bp, lip); + xfs_buf_do_callbacks(bp); XFS_BUF_SET_FSPRIVATE(bp, NULL); XFS_BUF_CLR_IODONE_FUNC(bp); xfs_buf_ioend(bp, 0); @@ -1063,7 +1073,7 @@ xfs_buf_error_relse( * We have to unpin the pinned buffers so do the * callbacks. */ - xfs_buf_do_callbacks(bp, lip); + xfs_buf_do_callbacks(bp); XFS_BUF_SET_FSPRIVATE(bp, NULL); XFS_BUF_CLR_IODONE_FUNC(bp); XFS_BUF_SET_BRELSE_FUNC(bp,NULL); -- 1.7.2.3 From SRS0+gPCZ+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:32:32 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.9 required=5.0 tests=BAYES_00,LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4WV7q158323 for ; Sun, 12 Dec 2010 22:32:32 -0600 X-ASG-Debug-ID: 1292214861-349b008a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9467A1E2D08 for ; Sun, 12 Dec 2010 20:34:22 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id UveHy1AVlfyTjymx for ; Sun, 12 Dec 2010 20:34:22 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49754361-1927428 for ; Mon, 13 Dec 2010 15:04:21 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS06z-00021D-SQ for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:34:09 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS05L-0004ig-QB for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:32:27 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 8/9] xfs: use AIL bulk update function to implement single updates Subject: [PATCH 8/9] xfs: use AIL bulk update function to implement single updates Date: Mon, 13 Dec 2010 15:32:22 +1100 Message-Id: <1292214743-18073-9-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292214743-18073-1-git-send-email-david@fromorbit.com> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1292214863 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner We now have two copies of AIL insert operations that are mostly duplicate functionality. The single log item updates can be implemented via the bulk updates by turning xfs_trans_ail_update() into a simple wrapper. This removes all the duplicate insert functionality and associated helpers. Signed-off-by: Dave Chinner --- fs/xfs/xfs_trans_ail.c | 88 ----------------------------------------------- fs/xfs/xfs_trans_priv.h | 21 +++++++---- 2 files changed, 14 insertions(+), 95 deletions(-) diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index a3d8406..8481a5a 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -28,7 +28,6 @@ #include "xfs_trans_priv.h" #include "xfs_error.h" -STATIC void xfs_ail_insert(struct xfs_ail *, xfs_log_item_t *); STATIC void xfs_ail_splice(struct xfs_ail *, struct list_head *, xfs_lsn_t); STATIC void xfs_ail_delete(struct xfs_ail *, xfs_log_item_t *); STATIC xfs_log_item_t * xfs_ail_min(struct xfs_ail *); @@ -450,58 +449,6 @@ xfs_trans_unlocked_item( xfs_log_move_tail(ailp->xa_mount, 1); } /* xfs_trans_unlocked_item */ - -/* - * Update the position of the item in the AIL with the new - * lsn. If it is not yet in the AIL, add it. Otherwise, move - * it to its new position by removing it and re-adding it. - * - * Wakeup anyone with an lsn less than the item's lsn. If the item - * we move in the AIL is the minimum one, update the tail lsn in the - * log manager. - * - * This function must be called with the AIL lock held. The lock - * is dropped before returning. - */ -void -xfs_trans_ail_update( - struct xfs_ail *ailp, - xfs_log_item_t *lip, - xfs_lsn_t lsn) __releases(ailp->xa_lock) -{ - xfs_log_item_t *mlip; /* ptr to minimum lip */ - xfs_lsn_t tail_lsn; - - mlip = xfs_ail_min(ailp); - - if (lip->li_flags & XFS_LI_IN_AIL) { - xfs_ail_delete(ailp, lip); - } else { - lip->li_flags |= XFS_LI_IN_AIL; - } - - lip->li_lsn = lsn; - xfs_ail_insert(ailp, lip); - - if (mlip == lip) { - mlip = xfs_ail_min(ailp); - /* - * It is not safe to access mlip after the AIL lock is - * dropped, so we must get a copy of li_lsn before we do - * so. This is especially important on 32-bit platforms - * where accessing and updating 64-bit values like li_lsn - * is not atomic. - */ - tail_lsn = mlip->li_lsn; - spin_unlock(&ailp->xa_lock); - xfs_log_move_tail(ailp->xa_mount, tail_lsn); - } else { - spin_unlock(&ailp->xa_lock); - } - - -} /* xfs_trans_update_ail */ - /* * xfs_trans_ail_update - bulk AIL insertion operation. * @@ -764,41 +711,6 @@ xfs_trans_ail_destroy( } /* - * Insert the given log item into the AIL. - * We almost always insert at the end of the list, so on inserts - * we search from the end of the list to find where the - * new item belongs. - */ -STATIC void -xfs_ail_insert( - struct xfs_ail *ailp, - xfs_log_item_t *lip) -{ - xfs_log_item_t *next_lip; - - /* - * If the list is empty, just insert the item. - */ - if (list_empty(&ailp->xa_ail)) { - list_add(&lip->li_ail, &ailp->xa_ail); - return; - } - - list_for_each_entry_reverse(next_lip, &ailp->xa_ail, li_ail) { - if (XFS_LSN_CMP(next_lip->li_lsn, lip->li_lsn) <= 0) - break; - } - - ASSERT((&next_lip->li_ail == &ailp->xa_ail) || - (XFS_LSN_CMP(next_lip->li_lsn, lip->li_lsn) <= 0)); - - list_add(&lip->li_ail, &next_lip->li_ail); - - xfs_ail_check(ailp, lip); - return; -} - -/* * splice the log item list into the AIL at the given LSN. */ STATIC void diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h index 246ca4d..95c95b6 100644 --- a/fs/xfs/xfs_trans_priv.h +++ b/fs/xfs/xfs_trans_priv.h @@ -75,13 +75,20 @@ struct xfs_ail { /* * From xfs_trans_ail.c */ -void xfs_trans_ail_update(struct xfs_ail *ailp, - struct xfs_log_item *lip, xfs_lsn_t lsn) - __releases(ailp->xa_lock); -void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, - struct xfs_log_item **log_items, - int nr_items, xfs_lsn_t lsn) - __releases(ailp->xa_lock); +void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, + struct xfs_log_item **log_items, int nr_items, + xfs_lsn_t lsn) __releases(ailp->xa_lock); +static inline void +xfs_trans_ail_update( + struct xfs_ail *ailp, + xfs_log_item_t *lip, + xfs_lsn_t lsn) __releases(ailp->xa_lock) +{ + struct xfs_log_item *log_items[1] = { lip, }; + + xfs_trans_ail_update_bulk(ailp, log_items, 1, lsn); +} + void xfs_trans_ail_delete(struct xfs_ail *ailp, struct xfs_log_item *lip) __releases(ailp->xa_lock); -- 1.7.2.3 From SRS0+Wbf7+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:55:18 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4tH1h160413 for ; Sun, 12 Dec 2010 22:55:17 -0600 X-ASG-Debug-ID: 1292215605-34ae00cb0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7284EA3B5B for ; Sun, 12 Dec 2010 20:46:45 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id 4c0GGsK7Wt60B3TD for ; Sun, 12 Dec 2010 20:46:45 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49126895-1927428 for ; Mon, 13 Dec 2010 15:16:44 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0Iz-00022a-At for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:33 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0HV-0004mK-5I for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:45:01 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 03/12] xfs: rework log grant space calculations Subject: [PATCH 03/12] xfs: rework log grant space calculations Date: Mon, 13 Dec 2010 15:44:34 +1100 Message-Id: <1292215483-18224-4-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292215483-18224-1-git-send-email-david@fromorbit.com> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292215607 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The log grant space calculations are repeated for both write and reserve grant heads. To make it simpler to convert the calculations toa different algorithm, factor them so both the gratn heads use the same calculation functions. Once this is done we can drop the wrappers that are used in only a couple of place to update both grant heads at once as they don't provide any particular value. Signed-off-by: Dave Chinner --- fs/xfs/xfs_log.c | 95 +++++++++++++++++++++++++++-------------------------- 1 files changed, 48 insertions(+), 47 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 99c6285..9a4b9ed 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -98,53 +98,34 @@ STATIC void xlog_verify_tail_lsn(xlog_t *log, xlog_in_core_t *iclog, STATIC int xlog_iclogs_empty(xlog_t *log); static void -xlog_grant_sub_space(struct log *log, int bytes) -{ - log->l_grant_write_bytes -= bytes; - if (log->l_grant_write_bytes < 0) { - log->l_grant_write_bytes += log->l_logsize; - log->l_grant_write_cycle--; - } - - log->l_grant_reserve_bytes -= bytes; - if ((log)->l_grant_reserve_bytes < 0) { - log->l_grant_reserve_bytes += log->l_logsize; - log->l_grant_reserve_cycle--; - } - -} - -static void -xlog_grant_add_space_write(struct log *log, int bytes) +xlog_grant_sub_space( + struct log *log, + int *cycle, + int *space, + int bytes) { - int tmp = log->l_logsize - log->l_grant_write_bytes; - if (tmp > bytes) - log->l_grant_write_bytes += bytes; - else { - log->l_grant_write_cycle++; - log->l_grant_write_bytes = bytes - tmp; + *space -= bytes; + if (*space < 0) { + *space += log->l_logsize; + (*cycle)--; } } static void -xlog_grant_add_space_reserve(struct log *log, int bytes) +xlog_grant_add_space( + struct log *log, + int *cycle, + int *space, + int bytes) { - int tmp = log->l_logsize - log->l_grant_reserve_bytes; + int tmp = log->l_logsize - *space; if (tmp > bytes) - log->l_grant_reserve_bytes += bytes; + *space += bytes; else { - log->l_grant_reserve_cycle++; - log->l_grant_reserve_bytes = bytes - tmp; + *space = bytes - tmp; + (*cycle)++; } } - -static inline void -xlog_grant_add_space(struct log *log, int bytes) -{ - xlog_grant_add_space_write(log, bytes); - xlog_grant_add_space_reserve(log, bytes); -} - static void xlog_tic_reset_res(xlog_ticket_t *tic) { @@ -1344,7 +1325,10 @@ xlog_sync(xlog_t *log, /* move grant heads by roundoff in sync */ spin_lock(&log->l_grant_lock); - xlog_grant_add_space(log, roundoff); + xlog_grant_add_space(log, &log->l_grant_reserve_cycle, + &log->l_grant_reserve_bytes, roundoff); + xlog_grant_add_space(log, &log->l_grant_write_cycle, + &log->l_grant_write_bytes, roundoff); spin_unlock(&log->l_grant_lock); /* put cycle number in every block */ @@ -2574,7 +2558,10 @@ redo: list_del_init(&tic->t_queue); /* we've got enough space */ - xlog_grant_add_space(log, need_bytes); + xlog_grant_add_space(log, &log->l_grant_reserve_cycle, + &log->l_grant_reserve_bytes, need_bytes); + xlog_grant_add_space(log, &log->l_grant_write_cycle, + &log->l_grant_write_bytes, need_bytes); trace_xfs_log_grant_exit(log, tic); xlog_verify_grant_head(log, 1); xlog_verify_grant_tail(log); @@ -2701,7 +2688,8 @@ redo: list_del_init(&tic->t_queue); /* we've got enough space */ - xlog_grant_add_space_write(log, need_bytes); + xlog_grant_add_space(log, &log->l_grant_write_cycle, + &log->l_grant_write_bytes, need_bytes); trace_xfs_log_regrant_write_exit(log, tic); xlog_verify_grant_head(log, 1); xlog_verify_grant_tail(log); @@ -2742,7 +2730,12 @@ xlog_regrant_reserve_log_space(xlog_t *log, ticket->t_cnt--; spin_lock(&log->l_grant_lock); - xlog_grant_sub_space(log, ticket->t_curr_res); + xlog_grant_sub_space(log, &log->l_grant_reserve_cycle, + &log->l_grant_reserve_bytes, + ticket->t_curr_res); + xlog_grant_sub_space(log, &log->l_grant_write_cycle, + &log->l_grant_write_bytes, + ticket->t_curr_res); ticket->t_curr_res = ticket->t_unit_res; xlog_tic_reset_res(ticket); @@ -2756,7 +2749,9 @@ xlog_regrant_reserve_log_space(xlog_t *log, return; } - xlog_grant_add_space_reserve(log, ticket->t_unit_res); + xlog_grant_add_space(log, &log->l_grant_reserve_cycle, + &log->l_grant_reserve_bytes, + ticket->t_unit_res); trace_xfs_log_regrant_reserve_exit(log, ticket); @@ -2785,24 +2780,30 @@ STATIC void xlog_ungrant_log_space(xlog_t *log, xlog_ticket_t *ticket) { + int bytes; + if (ticket->t_cnt > 0) ticket->t_cnt--; spin_lock(&log->l_grant_lock); trace_xfs_log_ungrant_enter(log, ticket); - - xlog_grant_sub_space(log, ticket->t_curr_res); - trace_xfs_log_ungrant_sub(log, ticket); - /* If this is a permanent reservation ticket, we may be able to free + /* + * If this is a permanent reservation ticket, we may be able to free * up more space based on the remaining count. */ + bytes = ticket->t_curr_res; if (ticket->t_cnt > 0) { ASSERT(ticket->t_flags & XLOG_TIC_PERM_RESERV); - xlog_grant_sub_space(log, ticket->t_unit_res*ticket->t_cnt); + bytes += ticket->t_unit_res*ticket->t_cnt; } + xlog_grant_sub_space(log, &log->l_grant_reserve_cycle, + &log->l_grant_reserve_bytes, bytes); + xlog_grant_sub_space(log, &log->l_grant_write_cycle, + &log->l_grant_write_bytes, bytes); + trace_xfs_log_ungrant_exit(log, ticket); xlog_verify_grant_head(log, 1); -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:55:19 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-0.8 required=5.0 tests=BAYES_00,LOCALPART_IN_SUBJECT autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4tJKI160432 for ; Sun, 12 Dec 2010 22:55:19 -0600 X-ASG-Debug-ID: 1292215585-3ef701050000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 67ABB1CB786B for ; Sun, 12 Dec 2010 20:46:26 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id ciGzRQi1xHZpYbX7 for ; Sun, 12 Dec 2010 20:46:26 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49641077-1927428 for ; Mon, 13 Dec 2010 15:16:25 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0Ip-00022N-6B for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:23 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0HL-0004mD-0g for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:44:51 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: xfs: grant lock scaling and removal V3 Subject: xfs: grant lock scaling and removal V3 Date: Mon, 13 Dec 2010 15:44:31 +1100 Message-Id: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292215587 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.02 X-Barracuda-Spam-Status: No, SCORE=-1.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=LOCALPART_IN_SUBJECT, LOCALPART_IN_SUBJECT_2 X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 LOCALPART_IN_SUBJECT Local part of To: address appears in Subject 1.00 LOCALPART_IN_SUBJECT_2 Local part of To: address appears in Subject X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This series addresses the log grant lock contention seen by 8-way fs_mark workloads. The log grant lock protects: - reserve grant head and wait queue - write grant head and wait queue - tail lsn - last sync lsn While they are all currently protected by a single lock, there is no reason that they need to all be under the same lock. As a result, one option for scaling was simply to split the grant lock into three locks - one for each of the above groups. However, this would mean that we'd need to nest locks inside each other and it ignores the fact that we really only use the lock on the tail and last sync lsn variables to protect against concurrent updates. Hence we can make the tail and last sync LSN variables independent of the grant lock by making them atomic variables. This means that when we are moving the tail of the log, we can avoid all locking except when there are waiters queued on the grant heads. Making the grant heads scale better is a bit more of a challenge. Just replacing the grant lock with reserve and write grant locks doesn't really help improve scalability because we'd still need to take both locks in the hot xfs_log_reserve() path. To improve scalability, we really need to make this path lock free. The first steps aree to clean up some of the code. We convert the ticket queues to use the common list_head infrastructure, factor out some common debug code, refactor and rearrange the grant head calculations code and convert all the users of the sv_t wait mechanisms to use wait queues directly. The second step to acheiving this is to encode the grant heads as a 64 bit variable and then convert it to an atomic variable. The tail/last sync LSNs also get converted to atomic variables, and this means we can read the grant heads without holding locks and that allows tail pushing calculations and available log space calculations to operate lock free. The next step is to introduce a lock per grant queue that is used exclusively to protect queue manpulations. With the use of list_empty_careful() we can check whether the queue has waiters without holding the queue lock. Hence in the case where the queues are empty we do not need to take the queue locks in the fast path. Finally, we need to make the grant head space calculations lockless. With the grant heads already being atomic variables, we can change the calculation algorithm to a lockless cmpxchg algorithm. This means we no longer need any spinlocks in the transaction reserve fast path and hence the scalability of this path should be significantly improved. There is one down side to this change - the xlog_verify_head() debug code can no longer be reliably used to detect accounting problems in the grant space allocations as it requires an atomic sample of both grant heads. However, the tail verification and the xlog_space_left() verification still works without problems, so we still have some debug checking on the grant head locations. Version 3: - dropped cleanup of xlog_grant_log_space() and xlog_regrant_log_write_space(). - split grant head aggregation into multiple patches - split out xlog_verify_tail() function - factor grant head calculations and drop wrappers - combine grant heads and add wrappers to crack/combine grant heads. - removed intermediate grant head "_lsn" suffix name. - folded all sv_t removal patches into one. - don't pass tail and last sync lsn into xlog_grant_push_ail(). - ensure that shutdown checks in ticket queue processing are done consistently before sleeping. - removed xlog_grant_verify_head() - folded grant lock removal into patch that converts grant head manipulations to lockless algorithms. - added a couple of tracepoints for when the log tail is moved and queued tickets are woken to aid debugging. Version 2: - split into lots of patches - clean up the code and comments - add patches to clean up sv_t usage at the end of the series From SRS0+Wbf7+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:55:18 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4tHP4160414 for ; Sun, 12 Dec 2010 22:55:17 -0600 X-ASG-Debug-ID: 1292215596-34ae00c80000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CAA6EA3B5B for ; Sun, 12 Dec 2010 20:46:36 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id moTJPNaII5JbtmA5 for ; Sun, 12 Dec 2010 20:46:36 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49126858-1927428 for ; Mon, 13 Dec 2010 15:16:35 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0Iz-00022k-Kl for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:33 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0HV-0004mg-Fv for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:45:01 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 09/12] xfs: convert log grant heads to atomic variables Subject: [PATCH 09/12] xfs: convert log grant heads to atomic variables Date: Mon, 13 Dec 2010 15:44:40 +1100 Message-Id: <1292215483-18224-10-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292215483-18224-1-git-send-email-david@fromorbit.com> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292215597 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Convert the log grant heads to atomic64_t types in preparation for converting the accounting algorithms to atomic operations. his patch just converts the variables; the algorithmic changes are in a separate patch for clarity. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_log.c | 8 ++++---- fs/xfs/xfs_log_priv.h | 12 ++++++------ 2 files changed, 10 insertions(+), 10 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 57bd143..cddfc6b 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -47,7 +47,7 @@ STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp, xfs_buftarg_t *log_target, xfs_daddr_t blk_offset, int num_bblks); -STATIC int xlog_space_left(struct log *log, int64_t *head); +STATIC int xlog_space_left(struct log *log, atomic64_t *head); STATIC int xlog_sync(xlog_t *log, xlog_in_core_t *iclog); STATIC void xlog_dealloc_log(xlog_t *log); @@ -100,7 +100,7 @@ STATIC int xlog_iclogs_empty(xlog_t *log); static void xlog_grant_sub_space( struct log *log, - int64_t *head, + atomic64_t *head, int bytes) { int cycle, space; @@ -119,7 +119,7 @@ xlog_grant_sub_space( static void xlog_grant_add_space( struct log *log, - int64_t *head, + atomic64_t *head, int bytes) { int tmp; @@ -816,7 +816,7 @@ xlog_assign_tail_lsn( STATIC int xlog_space_left( struct log *log, - int64_t *head) + atomic64_t *head) { int free_bytes; int tail_bytes; diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 100a410..24f510f 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -515,8 +515,8 @@ typedef struct log { spinlock_t l_grant_lock ____cacheline_aligned_in_smp; struct list_head l_reserveq; struct list_head l_writeq; - int64_t l_grant_reserve_head; - int64_t l_grant_write_head; + atomic64_t l_grant_reserve_head; + atomic64_t l_grant_write_head; /* * l_last_sync_lsn and l_tail_lsn are atomics so they can be set and @@ -594,18 +594,18 @@ xlog_assign_atomic_lsn(atomic64_t *lsn, uint cycle, uint block) * will always get consistent component values to work from. */ static inline void -xlog_crack_grant_head(int64_t *head, int *cycle, int *space) +xlog_crack_grant_head(atomic64_t *head, int *cycle, int *space) { - int64_t val = *head; + int64_t val = atomic64_read(head); *cycle = val >> 32; *space = val & 0xffffffff; } static inline void -xlog_assign_grant_head(int64_t *head, int cycle, int space) +xlog_assign_grant_head(atomic64_t *head, int cycle, int space) { - *head = ((int64_t)cycle << 32) | space; + atomic64_set(head, ((int64_t)cycle << 32) | space); } /* -- 1.7.2.3 From SRS0+w8Wj+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:55:19 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.9 required=5.0 tests=BAYES_00,LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4tJDP160429 for ; Sun, 12 Dec 2010 22:55:19 -0600 X-ASG-Debug-ID: 1292215605-4cab00360000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D1C891CBADE9 for ; Sun, 12 Dec 2010 20:46:46 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id IQdD3FtGduIHkB6c for ; Sun, 12 Dec 2010 20:46:46 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 4436869-1927428 for ; Mon, 13 Dec 2010 15:16:45 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0J9-000234-Nj for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:43 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0Hf-0004mm-ID for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:45:11 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 11/12] xfs: convert grant head manipulations to lockless algorithm Subject: [PATCH 11/12] xfs: convert grant head manipulations to lockless algorithm Date: Mon, 13 Dec 2010 15:44:42 +1100 Message-Id: <1292215483-18224-12-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292215483-18224-1-git-send-email-david@fromorbit.com> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292215607 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The only thing that the grant lock remains to protect is the grant head manipulations when adding or removing space from the log. These calculations are already based on atomic variables, so we can already update them safely without locks. However, the grant head manpulations require atomic multi-step calculations to be executed, which the algorithms currently don't allow. To make these multi-step calculations atomic, convert the algorithms to compare-and-exchange loops on the atomic variables. That is, we sample the old value, perform the calculation and use atomic64_cmpxchg() to attempt to update the head with the new value. If the head has not changed since we sampled it, it will succeed and we are done. Otherwise, we rerun the calculation again from a new sample of the head. This allows us to remove the grant lock from around all the grant head space manipulations, and that effectively removes the grant lock from the log completely. Hence we can remove the grant lock completely from the log at this point. Signed-off-by: Dave Chinner --- fs/xfs/xfs_log.c | 103 ++++++++++++++++--------------------------------- fs/xfs/xfs_log_priv.h | 23 +++++++---- 2 files changed, 49 insertions(+), 77 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index de3ad18..58326ba 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -81,7 +81,6 @@ STATIC void xlog_ungrant_log_space(xlog_t *log, #if defined(DEBUG) STATIC void xlog_verify_dest_ptr(xlog_t *log, char *ptr); -STATIC void xlog_verify_grant_head(xlog_t *log, int equals); STATIC void xlog_verify_grant_tail(struct log *log); STATIC void xlog_verify_iclog(xlog_t *log, xlog_in_core_t *iclog, int count, boolean_t syncing); @@ -89,7 +88,6 @@ STATIC void xlog_verify_tail_lsn(xlog_t *log, xlog_in_core_t *iclog, xfs_lsn_t tail_lsn); #else #define xlog_verify_dest_ptr(a,b) -#define xlog_verify_grant_head(a,b) #define xlog_verify_grant_tail(a) #define xlog_verify_iclog(a,b,c,d) #define xlog_verify_tail_lsn(a,b,c) @@ -103,17 +101,24 @@ xlog_grant_sub_space( atomic64_t *head, int bytes) { - int cycle, space; + int64_t head_val = atomic64_read(head); + int64_t new, old; - xlog_crack_grant_head(head, &cycle, &space); + do { + int cycle, space; - space -= bytes; - if (space < 0) { - space += log->l_logsize; - cycle--; - } + xlog_crack_grant_head_val(head_val, &cycle, &space); - xlog_assign_grant_head(head, cycle, space); + space -= bytes; + if (space < 0) { + space += log->l_logsize; + cycle--; + } + + old = head_val; + new = xlog_assign_grant_head_val(cycle, space); + head_val = atomic64_cmpxchg(head, old, new); + } while (head_val != old); } static void @@ -122,20 +127,27 @@ xlog_grant_add_space( atomic64_t *head, int bytes) { - int tmp; - int cycle, space; + int64_t head_val = atomic64_read(head); + int64_t new, old; - xlog_crack_grant_head(head, &cycle, &space); + do { + int tmp; + int cycle, space; - tmp = log->l_logsize - space; - if (tmp > bytes) - space += bytes; - else { - space = bytes - tmp; - cycle++; - } + xlog_crack_grant_head_val(head_val, &cycle, &space); - xlog_assign_grant_head(head, cycle, space); + tmp = log->l_logsize - space; + if (tmp > bytes) + space += bytes; + else { + space = bytes - tmp; + cycle++; + } + + old = head_val; + new = xlog_assign_grant_head_val(cycle, space); + head_val = atomic64_cmpxchg(head, old, new); + } while (head_val != old); } static void @@ -318,9 +330,7 @@ xfs_log_reserve( trace_xfs_log_reserve(log, internal_ticket); - spin_lock(&log->l_grant_lock); xlog_grant_push_ail(log, internal_ticket->t_unit_res); - spin_unlock(&log->l_grant_lock); retval = xlog_regrant_write_log_space(log, internal_ticket); } else { /* may sleep if need to allocate more tickets */ @@ -334,11 +344,9 @@ xfs_log_reserve( trace_xfs_log_reserve(log, internal_ticket); - spin_lock(&log->l_grant_lock); xlog_grant_push_ail(log, (internal_ticket->t_unit_res * internal_ticket->t_cnt)); - spin_unlock(&log->l_grant_lock); retval = xlog_grant_log_space(log, internal_ticket); } @@ -1057,7 +1065,6 @@ xlog_alloc_log(xfs_mount_t *mp, log->l_xbuf = bp; spin_lock_init(&log->l_icloglock); - spin_lock_init(&log->l_grant_lock); init_waitqueue_head(&log->l_flush_wait); /* log record size must be multiple of BBSIZE; see xlog_rec_header_t */ @@ -1135,7 +1142,6 @@ out_free_iclog: kmem_free(iclog); } spinlock_destroy(&log->l_icloglock); - spinlock_destroy(&log->l_grant_lock); xfs_buf_free(log->l_xbuf); out_free_log: kmem_free(log); @@ -1331,10 +1337,8 @@ xlog_sync(xlog_t *log, roundoff < BBTOB(1))); /* move grant heads by roundoff in sync */ - spin_lock(&log->l_grant_lock); xlog_grant_add_space(log, &log->l_grant_reserve_head, roundoff); xlog_grant_add_space(log, &log->l_grant_write_head, roundoff); - spin_unlock(&log->l_grant_lock); /* put cycle number in every block */ xlog_pack_data(log, iclog, roundoff); @@ -1455,7 +1459,6 @@ xlog_dealloc_log(xlog_t *log) iclog = next_iclog; } spinlock_destroy(&log->l_icloglock); - spinlock_destroy(&log->l_grant_lock); xfs_buf_free(log->l_xbuf); log->l_mp->m_log = NULL; @@ -2574,13 +2577,10 @@ redo: } /* we've got enough space */ - spin_lock(&log->l_grant_lock); xlog_grant_add_space(log, &log->l_grant_reserve_head, need_bytes); xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_grant_exit(log, tic); - xlog_verify_grant_head(log, 1); xlog_verify_grant_tail(log); - spin_unlock(&log->l_grant_lock); return 0; error_return_unlocked: @@ -2694,12 +2694,9 @@ redo: } /* we've got enough space */ - spin_lock(&log->l_grant_lock); xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_regrant_write_exit(log, tic); - xlog_verify_grant_head(log, 1); xlog_verify_grant_tail(log); - spin_unlock(&log->l_grant_lock); return 0; @@ -2737,7 +2734,6 @@ xlog_regrant_reserve_log_space(xlog_t *log, if (ticket->t_cnt > 0) ticket->t_cnt--; - spin_lock(&log->l_grant_lock); xlog_grant_sub_space(log, &log->l_grant_reserve_head, ticket->t_curr_res); xlog_grant_sub_space(log, &log->l_grant_write_head, @@ -2747,21 +2743,15 @@ xlog_regrant_reserve_log_space(xlog_t *log, trace_xfs_log_regrant_reserve_sub(log, ticket); - xlog_verify_grant_head(log, 1); - /* just return if we still have some of the pre-reserved space */ - if (ticket->t_cnt > 0) { - spin_unlock(&log->l_grant_lock); + if (ticket->t_cnt > 0) return; - } xlog_grant_add_space(log, &log->l_grant_reserve_head, ticket->t_unit_res); trace_xfs_log_regrant_reserve_exit(log, ticket); - xlog_verify_grant_head(log, 0); - spin_unlock(&log->l_grant_lock); ticket->t_curr_res = ticket->t_unit_res; xlog_tic_reset_res(ticket); } /* xlog_regrant_reserve_log_space */ @@ -2790,7 +2780,6 @@ xlog_ungrant_log_space(xlog_t *log, if (ticket->t_cnt > 0) ticket->t_cnt--; - spin_lock(&log->l_grant_lock); trace_xfs_log_ungrant_enter(log, ticket); trace_xfs_log_ungrant_sub(log, ticket); @@ -2809,8 +2798,6 @@ xlog_ungrant_log_space(xlog_t *log, trace_xfs_log_ungrant_exit(log, ticket); - xlog_verify_grant_head(log, 1); - spin_unlock(&log->l_grant_lock); xfs_log_move_tail(log->l_mp, 1); } /* xlog_ungrant_log_space */ @@ -3429,28 +3416,6 @@ xlog_verify_dest_ptr( } STATIC void -xlog_verify_grant_head(xlog_t *log, int equals) -{ - int reserve_cycle, reserve_space; - int write_cycle, write_space; - - xlog_crack_grant_head(&log->l_grant_reserve_head, - &reserve_cycle, &reserve_space); - xlog_crack_grant_head(&log->l_grant_write_head, - &write_cycle, &write_space); - - if (reserve_cycle == write_cycle) { - if (equals) - ASSERT(reserve_space >= write_space); - else - ASSERT(reserve_space > write_space); - } else { - ASSERT(reserve_cycle - 1 == write_cycle); - ASSERT(write_space >= reserve_space); - } -} - -STATIC void xlog_verify_grant_tail( struct log *log) { diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index c8e23ff..3b59d61 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -511,9 +511,6 @@ typedef struct log { int l_curr_block; /* current logical log block */ int l_prev_block; /* previous logical log block */ - /* The following block of fields are changed while holding grant_lock */ - spinlock_t l_grant_lock ____cacheline_aligned_in_smp; - /* * l_last_sync_lsn and l_tail_lsn are atomics so they can be set and * read without needing to hold specific locks. To avoid operations @@ -597,23 +594,33 @@ xlog_assign_atomic_lsn(atomic64_t *lsn, uint cycle, uint block) } /* - * When we crack the grrant head, we sample it first so that the value will not + * When we crack the grant head, we sample it first so that the value will not * change while we are cracking it into the component values. This means we * will always get consistent component values to work from. */ static inline void -xlog_crack_grant_head(atomic64_t *head, int *cycle, int *space) +xlog_crack_grant_head_val(int64_t val, int *cycle, int *space) { - int64_t val = atomic64_read(head); - *cycle = val >> 32; *space = val & 0xffffffff; } static inline void +xlog_crack_grant_head(atomic64_t *head, int *cycle, int *space) +{ + xlog_crack_grant_head_val(atomic64_read(head), cycle, space); +} + +static inline int64_t +xlog_assign_grant_head_val(int cycle, int space) +{ + return ((int64_t)cycle << 32) | space; +} + +static inline void xlog_assign_grant_head(atomic64_t *head, int cycle, int space) { - atomic64_set(head, ((int64_t)cycle << 32) | space); + atomic64_set(head, xlog_assign_grant_head_val(cycle, space)); } /* -- 1.7.2.3 From SRS0+Gu6A+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:55:19 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,SUBJ_TICKET autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4tJ4s160431 for ; Sun, 12 Dec 2010 22:55:19 -0600 X-ASG-Debug-ID: 1292215596-4cab00350000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id EEA551CB9B1B for ; Sun, 12 Dec 2010 20:46:36 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id dTiTdbWwyHU6vXvK for ; Sun, 12 Dec 2010 20:46:36 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49889414-1927428 for ; Mon, 13 Dec 2010 15:16:35 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0Iz-00022m-MK for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:33 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0HV-0004mj-HZ for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:45:01 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 10/12] xfs: introduce new locks for the log grant ticket wait queues Subject: [PATCH 10/12] xfs: introduce new locks for the log grant ticket wait queues Date: Mon, 13 Dec 2010 15:44:41 +1100 Message-Id: <1292215483-18224-11-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292215483-18224-1-git-send-email-david@fromorbit.com> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292215597 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The log grant ticket wait queues are currently protected by the log grant lock. However, the queues are functionally independent from each other, and operations on them only require serialisation against other queue operations now that all of the other log variables they use are atomic values. Hence, we can make them independent of the grant lock by introducing new locks just to protect the lists operations. because the lists are independent, we can use a lock per list and ensure that reserve and write head queuing do not contend. To ensure forced shutdowns work correctly in conjunction with the new fast paths, ensure that we check whether the log has been shut down in the grant functions once we hold the relevant spin locks but before we go to sleep. This is needed to co-ordinate correctly with the wakeups that are issued on the ticket queues so we don't leave any processes sleeping on the queues during a shutdown. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_trace.h | 2 + fs/xfs/xfs_log.c | 139 +++++++++++++++++++++++++----------------- fs/xfs/xfs_log_priv.h | 16 ++++- 3 files changed, 97 insertions(+), 60 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h index 2f62d0f..7fae8d5 100644 --- a/fs/xfs/linux-2.6/xfs_trace.h +++ b/fs/xfs/linux-2.6/xfs_trace.h @@ -837,6 +837,7 @@ DEFINE_LOGGRANT_EVENT(xfs_log_grant_sleep1); DEFINE_LOGGRANT_EVENT(xfs_log_grant_wake1); DEFINE_LOGGRANT_EVENT(xfs_log_grant_sleep2); DEFINE_LOGGRANT_EVENT(xfs_log_grant_wake2); +DEFINE_LOGGRANT_EVENT(xfs_log_grant_wake_up); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_enter); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_exit); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_error); @@ -844,6 +845,7 @@ DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_sleep1); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake1); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_sleep2); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake2); +DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake_up); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_enter); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_exit); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_sub); diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index cddfc6b..de3ad18 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -682,12 +682,12 @@ xfs_log_move_tail(xfs_mount_t *mp, if (tail_lsn != 1) atomic64_set(&log->l_tail_lsn, tail_lsn); - spin_lock(&log->l_grant_lock); - if (!list_empty(&log->l_writeq)) { + if (!list_empty_careful(&log->l_writeq)) { #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); #endif + spin_lock(&log->l_grant_write_lock); free_bytes = xlog_space_left(log, &log->l_grant_write_head); list_for_each_entry(tic, &log->l_writeq, t_queue) { ASSERT(tic->t_flags & XLOG_TIC_PERM_RESERV); @@ -696,15 +696,18 @@ xfs_log_move_tail(xfs_mount_t *mp, break; tail_lsn = 0; free_bytes -= tic->t_unit_res; + trace_xfs_log_regrant_write_wake_up(log, tic); wake_up(&tic->t_wait); } + spin_unlock(&log->l_grant_write_lock); } - if (!list_empty(&log->l_reserveq)) { + if (!list_empty_careful(&log->l_reserveq)) { #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); #endif + spin_lock(&log->l_grant_reserve_lock); free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); list_for_each_entry(tic, &log->l_reserveq, t_queue) { if (tic->t_flags & XLOG_TIC_PERM_RESERV) @@ -715,11 +718,12 @@ xfs_log_move_tail(xfs_mount_t *mp, break; tail_lsn = 0; free_bytes -= need_bytes; + trace_xfs_log_grant_wake_up(log, tic); wake_up(&tic->t_wait); } + spin_unlock(&log->l_grant_reserve_lock); } - spin_unlock(&log->l_grant_lock); -} /* xfs_log_move_tail */ +} /* * Determine if we have a transaction that has gone to disk @@ -1010,6 +1014,8 @@ xlog_alloc_log(xfs_mount_t *mp, xlog_assign_grant_head(&log->l_grant_write_head, 1, 0); INIT_LIST_HEAD(&log->l_reserveq); INIT_LIST_HEAD(&log->l_writeq); + spin_lock_init(&log->l_grant_reserve_lock); + spin_lock_init(&log->l_grant_write_lock); error = EFSCORRUPTED; if (xfs_sb_version_hassector(&mp->m_sb)) { @@ -2477,6 +2483,18 @@ restart: * * Once a ticket gets put onto the reserveq, it will only return after * the needed reservation is satisfied. + * + * This function is structured so that it has a lock free fast path. This is + * necessary because every new transaction reservation will come through this + * path. Hence any lock will be globally hot if we take it unconditionally on + * every pass. + * + * As tickets are only ever moved on and off the reserveq under the + * l_grant_reserve_lock, we only need to take that lock if we are going + * to add the ticket to the queue and sleep. We can avoid taking the lock if the + * ticket was never added to the reserveq because the t_queue list head will be + * empty and we hold the only reference to it so it can safely be checked + * unlocked. */ STATIC int xlog_grant_log_space(xlog_t *log, @@ -2490,13 +2508,20 @@ xlog_grant_log_space(xlog_t *log, panic("grant Recovery problem"); #endif - /* Is there space or do we need to sleep? */ - spin_lock(&log->l_grant_lock); - trace_xfs_log_grant_enter(log, tic); + need_bytes = tic->t_unit_res; + if (tic->t_flags & XFS_LOG_PERM_RESERV) + need_bytes *= tic->t_ocnt; + /* something is already sleeping; insert new transaction at end */ - if (!list_empty(&log->l_reserveq)) { + if (!list_empty_careful(&log->l_reserveq)) { + spin_lock(&log->l_grant_reserve_lock); + /* recheck the queue now we are locked */ + if (list_empty(&log->l_reserveq)) { + spin_unlock(&log->l_grant_reserve_lock); + goto redo; + } list_add_tail(&tic->t_queue, &log->l_reserveq); trace_xfs_log_grant_sleep1(log, tic); @@ -2509,48 +2534,47 @@ xlog_grant_log_space(xlog_t *log, goto error_return; XFS_STATS_INC(xs_sleep_logspace); - xlog_wait(&tic->t_wait, &log->l_grant_lock); + xlog_wait(&tic->t_wait, &log->l_grant_reserve_lock); /* * If we got an error, and the filesystem is shutting down, * we'll catch it down below. So just continue... */ trace_xfs_log_grant_wake1(log, tic); - spin_lock(&log->l_grant_lock); } - if (tic->t_flags & XFS_LOG_PERM_RESERV) - need_bytes = tic->t_unit_res*tic->t_ocnt; - else - need_bytes = tic->t_unit_res; redo: if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + goto error_return_unlocked; free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); if (free_bytes < need_bytes) { + spin_lock(&log->l_grant_reserve_lock); if (list_empty(&tic->t_queue)) list_add_tail(&tic->t_queue, &log->l_reserveq); trace_xfs_log_grant_sleep2(log, tic); + if (XLOG_FORCED_SHUTDOWN(log)) + goto error_return; + xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); - xlog_wait(&tic->t_wait, &log->l_grant_lock); - - spin_lock(&log->l_grant_lock); - if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + xlog_wait(&tic->t_wait, &log->l_grant_reserve_lock); trace_xfs_log_grant_wake2(log, tic); - goto redo; } - list_del_init(&tic->t_queue); + if (!list_empty(&tic->t_queue)) { + spin_lock(&log->l_grant_reserve_lock); + list_del_init(&tic->t_queue); + spin_unlock(&log->l_grant_reserve_lock); + } /* we've got enough space */ + spin_lock(&log->l_grant_lock); xlog_grant_add_space(log, &log->l_grant_reserve_head, need_bytes); xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_grant_exit(log, tic); @@ -2559,8 +2583,11 @@ redo: spin_unlock(&log->l_grant_lock); return 0; - error_return: +error_return_unlocked: + spin_lock(&log->l_grant_reserve_lock); +error_return: list_del_init(&tic->t_queue); + spin_unlock(&log->l_grant_reserve_lock); trace_xfs_log_grant_error(log, tic); /* @@ -2570,7 +2597,6 @@ redo: */ tic->t_curr_res = 0; tic->t_cnt = 0; /* ungrant will give back unit_res * t_cnt. */ - spin_unlock(&log->l_grant_lock); return XFS_ERROR(EIO); } /* xlog_grant_log_space */ @@ -2578,7 +2604,8 @@ redo: /* * Replenish the byte reservation required by moving the grant write head. * - * + * Similar to xlog_grant_log_space, the function is structured to have a lock + * free fast path. */ STATIC int xlog_regrant_write_log_space(xlog_t *log, @@ -2597,12 +2624,9 @@ xlog_regrant_write_log_space(xlog_t *log, panic("regrant Recovery problem"); #endif - spin_lock(&log->l_grant_lock); - trace_xfs_log_regrant_write_enter(log, tic); - if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + goto error_return_unlocked; /* If there are other waiters on the queue then give them a * chance at logspace before us. Wake up the first waiters, @@ -2611,8 +2635,10 @@ xlog_regrant_write_log_space(xlog_t *log, * this transaction. */ need_bytes = tic->t_unit_res; - if (!list_empty(&log->l_writeq)) { + if (!list_empty_careful(&log->l_writeq)) { struct xlog_ticket *ntic; + + spin_lock(&log->l_grant_write_lock); free_bytes = xlog_space_left(log, &log->l_grant_write_head); list_for_each_entry(ntic, &log->l_writeq, t_queue) { ASSERT(ntic->t_flags & XLOG_TIC_PERM_RESERV); @@ -2627,50 +2653,48 @@ xlog_regrant_write_log_space(xlog_t *log, struct xlog_ticket, t_queue)) { if (list_empty(&tic->t_queue)) list_add_tail(&tic->t_queue, &log->l_writeq); - trace_xfs_log_regrant_write_sleep1(log, tic); xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); - xlog_wait(&tic->t_wait, &log->l_grant_lock); - - /* If we're shutting down, this tic is already - * off the queue */ - spin_lock(&log->l_grant_lock); - if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; - + xlog_wait(&tic->t_wait, &log->l_grant_write_lock); trace_xfs_log_regrant_write_wake1(log, tic); - } + } else + spin_unlock(&log->l_grant_write_lock); } redo: if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + goto error_return_unlocked; free_bytes = xlog_space_left(log, &log->l_grant_write_head); if (free_bytes < need_bytes) { + spin_lock(&log->l_grant_write_lock); if (list_empty(&tic->t_queue)) list_add_tail(&tic->t_queue, &log->l_writeq); + + if (XLOG_FORCED_SHUTDOWN(log)) + goto error_return; + xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); trace_xfs_log_regrant_write_sleep2(log, tic); - xlog_wait(&tic->t_wait, &log->l_grant_lock); - - /* If we're shutting down, this tic is already off the queue */ - spin_lock(&log->l_grant_lock); - if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + xlog_wait(&tic->t_wait, &log->l_grant_write_lock); trace_xfs_log_regrant_write_wake2(log, tic); goto redo; } - list_del_init(&tic->t_queue); + if (!list_empty(&tic->t_queue)) { + spin_lock(&log->l_grant_write_lock); + list_del_init(&tic->t_queue); + spin_unlock(&log->l_grant_write_lock); + } /* we've got enough space */ + spin_lock(&log->l_grant_lock); xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_regrant_write_exit(log, tic); xlog_verify_grant_head(log, 1); @@ -2679,8 +2703,11 @@ redo: return 0; + error_return_unlocked: + spin_lock(&log->l_grant_write_lock); error_return: list_del_init(&tic->t_queue); + spin_unlock(&log->l_grant_write_lock); trace_xfs_log_regrant_write_error(log, tic); /* @@ -2690,7 +2717,6 @@ redo: */ tic->t_curr_res = 0; tic->t_cnt = 0; /* ungrant will give back unit_res * t_cnt. */ - spin_unlock(&log->l_grant_lock); return XFS_ERROR(EIO); } /* xlog_regrant_write_log_space */ @@ -3664,12 +3690,10 @@ xfs_log_force_umount( xlog_cil_force(log); /* - * We must hold both the GRANT lock and the LOG lock, - * before we mark the filesystem SHUTDOWN and wake - * everybody up to tell the bad news. + * mark the filesystem and the as in a shutdown state and wake + * everybody up to tell them the bad news. */ spin_lock(&log->l_icloglock); - spin_lock(&log->l_grant_lock); mp->m_flags |= XFS_MOUNT_FS_SHUTDOWN; if (mp->m_sb_bp) XFS_BUF_DONE(mp->m_sb_bp); @@ -3694,14 +3718,17 @@ xfs_log_force_umount( * means we have to wake up everybody queued up on reserveq as well as * writeq. In addition, we make sure in xlog_{re}grant_log_space that * we don't enqueue anything once the SHUTDOWN flag is set, and this - * action is protected by the GRANTLOCK. + * action is protected by the grant locks. */ + spin_lock(&log->l_grant_reserve_lock); list_for_each_entry(tic, &log->l_reserveq, t_queue) wake_up(&tic->t_wait); + spin_unlock(&log->l_grant_reserve_lock); + spin_lock(&log->l_grant_write_lock); list_for_each_entry(tic, &log->l_writeq, t_queue) wake_up(&tic->t_wait); - spin_unlock(&log->l_grant_lock); + spin_unlock(&log->l_grant_write_lock); if (!(log->l_iclog->ic_state & XLOG_STATE_IOERROR)) { ASSERT(!logerror); diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 24f510f..c8e23ff 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -513,10 +513,6 @@ typedef struct log { /* The following block of fields are changed while holding grant_lock */ spinlock_t l_grant_lock ____cacheline_aligned_in_smp; - struct list_head l_reserveq; - struct list_head l_writeq; - atomic64_t l_grant_reserve_head; - atomic64_t l_grant_write_head; /* * l_last_sync_lsn and l_tail_lsn are atomics so they can be set and @@ -529,6 +525,18 @@ typedef struct log { /* lsn of 1st LR with unflushed * buffers */ atomic64_t l_tail_lsn ____cacheline_aligned_in_smp; + /* + * ticket grant locks, queues and accounting have their own cachlines + * as these are quite hot and can be operated on concurrently. + */ + spinlock_t l_grant_reserve_lock ____cacheline_aligned_in_smp; + struct list_head l_reserveq; + atomic64_t l_grant_reserve_head; + + spinlock_t l_grant_write_lock ____cacheline_aligned_in_smp; + struct list_head l_writeq; + atomic64_t l_grant_write_head; + /* The following field are used for debugging; need to hold icloglock */ #ifdef DEBUG char *l_iclog_bak[XLOG_MAX_ICLOGS]; -- 1.7.2.3 From SRS0+hhRK+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:55:19 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4tJIH160430 for ; Sun, 12 Dec 2010 22:55:19 -0600 X-ASG-Debug-ID: 1292215585-4caa00310000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 37B511C2522A for ; Sun, 12 Dec 2010 20:46:25 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id HfqGIl9U0saSOyuk for ; Sun, 12 Dec 2010 20:46:25 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49485026-1927428 for ; Mon, 13 Dec 2010 15:16:24 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0Ip-00022P-9J for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:23 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0HL-0004mH-4X for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:44:51 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 02/12] xfs: fact out common grant head/log tail verification code Subject: [PATCH 02/12] xfs: fact out common grant head/log tail verification code Date: Mon, 13 Dec 2010 15:44:33 +1100 Message-Id: <1292215483-18224-3-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292215483-18224-1-git-send-email-david@fromorbit.com> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1292215587 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Factor repeated debug code out of grant head manipulation functions into a separate function. This removes ifdef DEBUG spagetti from the code and makes the code easier to follow. Signed-off-by: Dave Chinner --- fs/xfs/xfs_log.c | 51 ++++++++++++++++++++++----------------------------- 1 files changed, 22 insertions(+), 29 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 1b82735..99c6285 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -82,6 +82,7 @@ STATIC void xlog_ungrant_log_space(xlog_t *log, #if defined(DEBUG) STATIC void xlog_verify_dest_ptr(xlog_t *log, char *ptr); STATIC void xlog_verify_grant_head(xlog_t *log, int equals); +STATIC void xlog_verify_grant_tail(struct log *log); STATIC void xlog_verify_iclog(xlog_t *log, xlog_in_core_t *iclog, int count, boolean_t syncing); STATIC void xlog_verify_tail_lsn(xlog_t *log, xlog_in_core_t *iclog, @@ -89,6 +90,7 @@ STATIC void xlog_verify_tail_lsn(xlog_t *log, xlog_in_core_t *iclog, #else #define xlog_verify_dest_ptr(a,b) #define xlog_verify_grant_head(a,b) +#define xlog_verify_grant_tail(a) #define xlog_verify_iclog(a,b,c,d) #define xlog_verify_tail_lsn(a,b,c) #endif @@ -2503,10 +2505,6 @@ xlog_grant_log_space(xlog_t *log, { int free_bytes; int need_bytes; -#ifdef DEBUG - xfs_lsn_t tail_lsn; -#endif - #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) @@ -2577,21 +2575,9 @@ redo: /* we've got enough space */ xlog_grant_add_space(log, need_bytes); -#ifdef DEBUG - tail_lsn = log->l_tail_lsn; - /* - * Check to make sure the grant write head didn't just over lap the - * tail. If the cycles are the same, we can't be overlapping. - * Otherwise, make sure that the cycles differ by exactly one and - * check the byte count. - */ - if (CYCLE_LSN(tail_lsn) != log->l_grant_write_cycle) { - ASSERT(log->l_grant_write_cycle-1 == CYCLE_LSN(tail_lsn)); - ASSERT(log->l_grant_write_bytes <= BBTOB(BLOCK_LSN(tail_lsn))); - } -#endif trace_xfs_log_grant_exit(log, tic); xlog_verify_grant_head(log, 1); + xlog_verify_grant_tail(log); spin_unlock(&log->l_grant_lock); return 0; @@ -2621,9 +2607,6 @@ xlog_regrant_write_log_space(xlog_t *log, xlog_ticket_t *tic) { int free_bytes, need_bytes; -#ifdef DEBUG - xfs_lsn_t tail_lsn; -#endif tic->t_curr_res = tic->t_unit_res; xlog_tic_reset_res(tic); @@ -2719,17 +2702,9 @@ redo: /* we've got enough space */ xlog_grant_add_space_write(log, need_bytes); -#ifdef DEBUG - tail_lsn = log->l_tail_lsn; - if (CYCLE_LSN(tail_lsn) != log->l_grant_write_cycle) { - ASSERT(log->l_grant_write_cycle-1 == CYCLE_LSN(tail_lsn)); - ASSERT(log->l_grant_write_bytes <= BBTOB(BLOCK_LSN(tail_lsn))); - } -#endif - trace_xfs_log_regrant_write_exit(log, tic); - xlog_verify_grant_head(log, 1); + xlog_verify_grant_tail(log); spin_unlock(&log->l_grant_lock); return 0; @@ -3465,6 +3440,24 @@ xlog_verify_grant_head(xlog_t *log, int equals) } } /* xlog_verify_grant_head */ +STATIC void +xlog_verify_grant_tail( + struct log *log) +{ + xfs_lsn_t tail_lsn = log->l_tail_lsn; + + /* + * Check to make sure the grant write head didn't just over lap the + * tail. If the cycles are the same, we can't be overlapping. + * Otherwise, make sure that the cycles differ by exactly one and + * check the byte count. + */ + if (CYCLE_LSN(tail_lsn) != log->l_grant_write_cycle) { + ASSERT(log->l_grant_write_cycle - 1 == CYCLE_LSN(tail_lsn)); + ASSERT(log->l_grant_write_bytes <= BBTOB(BLOCK_LSN(tail_lsn))); + } +} + /* check if it will fit */ STATIC void xlog_verify_tail_lsn(xlog_t *log, -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:55:20 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_65 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4tJLn160441 for ; Sun, 12 Dec 2010 22:55:19 -0600 X-ASG-Debug-ID: 1292215605-3ef7010b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9876D1CB9B1B for ; Sun, 12 Dec 2010 20:46:46 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id lW7NGXh1fzYvVGxL for ; Sun, 12 Dec 2010 20:46:46 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50129160-1927428 for ; Mon, 13 Dec 2010 15:16:45 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0J9-00022b-BR for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:43 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0HV-0004mS-6z for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:45:01 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 04/12] xfs: combine grant heads into a single 64 bit integer Subject: [PATCH 04/12] xfs: combine grant heads into a single 64 bit integer Date: Mon, 13 Dec 2010 15:44:35 +1100 Message-Id: <1292215483-18224-5-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292215483-18224-1-git-send-email-david@fromorbit.com> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292215607 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Prepare for switching the grant heads to atomic variables by combining the two 32 bit values that make up the grant head into a single 64 bit variable. Provide wrapper functions to combine and split the grant heads appropriately for calculations and use them as necessary. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_trace.h | 10 ++- fs/xfs/xfs_log.c | 166 ++++++++++++++++++++++-------------------- fs/xfs/xfs_log_priv.h | 26 ++++++- fs/xfs/xfs_log_recover.c | 8 +- 4 files changed, 119 insertions(+), 91 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h index f400668..82dfcd7 100644 --- a/fs/xfs/linux-2.6/xfs_trace.h +++ b/fs/xfs/linux-2.6/xfs_trace.h @@ -786,10 +786,12 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, __entry->flags = tic->t_flags; __entry->reserveq = log->l_reserveq.next; __entry->writeq = log->l_writeq.next; - __entry->grant_reserve_cycle = log->l_grant_reserve_cycle; - __entry->grant_reserve_bytes = log->l_grant_reserve_bytes; - __entry->grant_write_cycle = log->l_grant_write_cycle; - __entry->grant_write_bytes = log->l_grant_write_bytes; + xlog_crack_grant_head(&log->l_grant_reserve_head, + &__entry->grant_reserve_cycle, + &__entry->grant_reserve_bytes); + xlog_crack_grant_head(&log->l_grant_write_head, + &__entry->grant_write_cycle, + &__entry->grant_write_bytes); __entry->curr_cycle = log->l_curr_cycle; __entry->curr_block = log->l_curr_block; __entry->tail_lsn = log->l_tail_lsn; diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 9a4b9ed..3299faa 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -47,7 +47,7 @@ STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp, xfs_buftarg_t *log_target, xfs_daddr_t blk_offset, int num_bblks); -STATIC int xlog_space_left(xlog_t *log, int cycle, int bytes); +STATIC int xlog_space_left(struct log *log, int64_t *head); STATIC int xlog_sync(xlog_t *log, xlog_in_core_t *iclog); STATIC void xlog_dealloc_log(xlog_t *log); @@ -100,32 +100,44 @@ STATIC int xlog_iclogs_empty(xlog_t *log); static void xlog_grant_sub_space( struct log *log, - int *cycle, - int *space, + int64_t *head, int bytes) { - *space -= bytes; - if (*space < 0) { - *space += log->l_logsize; - (*cycle)--; + int cycle, space; + + xlog_crack_grant_head(head, &cycle, &space); + + space -= bytes; + if (space < 0) { + space += log->l_logsize; + cycle--; } + + xlog_assign_grant_head(head, cycle, space); } static void xlog_grant_add_space( struct log *log, - int *cycle, - int *space, + int64_t *head, int bytes) { - int tmp = log->l_logsize - *space; + int tmp; + int cycle, space; + + xlog_crack_grant_head(head, &cycle, &space); + + tmp = log->l_logsize - space; if (tmp > bytes) - *space += bytes; + space += bytes; else { - *space = bytes - tmp; - (*cycle)++; + space = bytes - tmp; + cycle++; } + + xlog_assign_grant_head(head, cycle, space); } + static void xlog_tic_reset_res(xlog_ticket_t *tic) { @@ -654,7 +666,7 @@ xfs_log_move_tail(xfs_mount_t *mp, { xlog_ticket_t *tic; xlog_t *log = mp->m_log; - int need_bytes, free_bytes, cycle, bytes; + int need_bytes, free_bytes; if (XLOG_FORCED_SHUTDOWN(log)) return; @@ -680,9 +692,7 @@ xfs_log_move_tail(xfs_mount_t *mp, if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); #endif - cycle = log->l_grant_write_cycle; - bytes = log->l_grant_write_bytes; - free_bytes = xlog_space_left(log, cycle, bytes); + free_bytes = xlog_space_left(log, &log->l_grant_write_head); list_for_each_entry(tic, &log->l_writeq, t_queue) { ASSERT(tic->t_flags & XLOG_TIC_PERM_RESERV); @@ -699,9 +709,7 @@ xfs_log_move_tail(xfs_mount_t *mp, if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); #endif - cycle = log->l_grant_reserve_cycle; - bytes = log->l_grant_reserve_bytes; - free_bytes = xlog_space_left(log, cycle, bytes); + free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); list_for_each_entry(tic, &log->l_reserveq, t_queue) { if (tic->t_flags & XLOG_TIC_PERM_RESERV) need_bytes = tic->t_unit_res*tic->t_cnt; @@ -814,21 +822,26 @@ xlog_assign_tail_lsn(xfs_mount_t *mp) * result is that we return the size of the log as the amount of space left. */ STATIC int -xlog_space_left(xlog_t *log, int cycle, int bytes) +xlog_space_left( + struct log *log, + int64_t *head) { - int free_bytes; - int tail_bytes; - int tail_cycle; + int free_bytes; + int tail_bytes; + int tail_cycle; + int head_cycle; + int head_bytes; + xlog_crack_grant_head(head, &head_cycle, &head_bytes); tail_bytes = BBTOB(BLOCK_LSN(log->l_tail_lsn)); tail_cycle = CYCLE_LSN(log->l_tail_lsn); - if ((tail_cycle == cycle) && (bytes >= tail_bytes)) { - free_bytes = log->l_logsize - (bytes - tail_bytes); - } else if ((tail_cycle + 1) < cycle) { + if ((tail_cycle == head_cycle) && (head_bytes >= tail_bytes)) { + free_bytes = log->l_logsize - (head_bytes - tail_bytes); + } else if ((tail_cycle + 1) < head_cycle) { return 0; - } else if (tail_cycle < cycle) { - ASSERT(tail_cycle == (cycle - 1)); - free_bytes = tail_bytes - bytes; + } else if (tail_cycle < head_cycle) { + ASSERT(tail_cycle == (head_cycle - 1)); + free_bytes = tail_bytes - head_bytes; } else { /* * The reservation head is behind the tail. @@ -839,12 +852,12 @@ xlog_space_left(xlog_t *log, int cycle, int bytes) "xlog_space_left: head behind tail\n" " tail_cycle = %d, tail_bytes = %d\n" " GH cycle = %d, GH bytes = %d", - tail_cycle, tail_bytes, cycle, bytes); + tail_cycle, tail_bytes, head_cycle, head_bytes); ASSERT(0); free_bytes = log->l_logsize; } return free_bytes; -} /* xlog_space_left */ +} /* @@ -1001,8 +1014,8 @@ xlog_alloc_log(xfs_mount_t *mp, /* log->l_tail_lsn = 0x100000000LL; cycle = 1; current block = 0 */ log->l_last_sync_lsn = log->l_tail_lsn; log->l_curr_cycle = 1; /* 0 is bad since this is initial value */ - log->l_grant_reserve_cycle = 1; - log->l_grant_write_cycle = 1; + xlog_assign_grant_head(&log->l_grant_reserve_head, 1, 0); + xlog_assign_grant_head(&log->l_grant_write_head, 1, 0); INIT_LIST_HEAD(&log->l_reserveq); INIT_LIST_HEAD(&log->l_writeq); @@ -1190,9 +1203,7 @@ xlog_grant_push_ail(xfs_mount_t *mp, ASSERT(BTOBB(need_bytes) < log->l_logBBsize); spin_lock(&log->l_grant_lock); - free_bytes = xlog_space_left(log, - log->l_grant_reserve_cycle, - log->l_grant_reserve_bytes); + free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); tail_lsn = log->l_tail_lsn; free_blocks = BTOBBT(free_bytes); @@ -1325,10 +1336,8 @@ xlog_sync(xlog_t *log, /* move grant heads by roundoff in sync */ spin_lock(&log->l_grant_lock); - xlog_grant_add_space(log, &log->l_grant_reserve_cycle, - &log->l_grant_reserve_bytes, roundoff); - xlog_grant_add_space(log, &log->l_grant_write_cycle, - &log->l_grant_write_bytes, roundoff); + xlog_grant_add_space(log, &log->l_grant_reserve_head, roundoff); + xlog_grant_add_space(log, &log->l_grant_write_head, roundoff); spin_unlock(&log->l_grant_lock); /* put cycle number in every block */ @@ -2531,8 +2540,7 @@ redo: if (XLOG_FORCED_SHUTDOWN(log)) goto error_return; - free_bytes = xlog_space_left(log, log->l_grant_reserve_cycle, - log->l_grant_reserve_bytes); + free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); if (free_bytes < need_bytes) { if (list_empty(&tic->t_queue)) list_add_tail(&tic->t_queue, &log->l_reserveq); @@ -2558,10 +2566,8 @@ redo: list_del_init(&tic->t_queue); /* we've got enough space */ - xlog_grant_add_space(log, &log->l_grant_reserve_cycle, - &log->l_grant_reserve_bytes, need_bytes); - xlog_grant_add_space(log, &log->l_grant_write_cycle, - &log->l_grant_write_bytes, need_bytes); + xlog_grant_add_space(log, &log->l_grant_reserve_head, need_bytes); + xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_grant_exit(log, tic); xlog_verify_grant_head(log, 1); xlog_verify_grant_tail(log); @@ -2622,8 +2628,7 @@ xlog_regrant_write_log_space(xlog_t *log, need_bytes = tic->t_unit_res; if (!list_empty(&log->l_writeq)) { struct xlog_ticket *ntic; - free_bytes = xlog_space_left(log, log->l_grant_write_cycle, - log->l_grant_write_bytes); + free_bytes = xlog_space_left(log, &log->l_grant_write_head); list_for_each_entry(ntic, &log->l_writeq, t_queue) { ASSERT(ntic->t_flags & XLOG_TIC_PERM_RESERV); @@ -2662,8 +2667,7 @@ redo: if (XLOG_FORCED_SHUTDOWN(log)) goto error_return; - free_bytes = xlog_space_left(log, log->l_grant_write_cycle, - log->l_grant_write_bytes); + free_bytes = xlog_space_left(log, &log->l_grant_write_head); if (free_bytes < need_bytes) { if (list_empty(&tic->t_queue)) list_add_tail(&tic->t_queue, &log->l_writeq); @@ -2688,8 +2692,7 @@ redo: list_del_init(&tic->t_queue); /* we've got enough space */ - xlog_grant_add_space(log, &log->l_grant_write_cycle, - &log->l_grant_write_bytes, need_bytes); + xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_regrant_write_exit(log, tic); xlog_verify_grant_head(log, 1); xlog_verify_grant_tail(log); @@ -2730,12 +2733,10 @@ xlog_regrant_reserve_log_space(xlog_t *log, ticket->t_cnt--; spin_lock(&log->l_grant_lock); - xlog_grant_sub_space(log, &log->l_grant_reserve_cycle, - &log->l_grant_reserve_bytes, - ticket->t_curr_res); - xlog_grant_sub_space(log, &log->l_grant_write_cycle, - &log->l_grant_write_bytes, - ticket->t_curr_res); + xlog_grant_sub_space(log, &log->l_grant_reserve_head, + ticket->t_curr_res); + xlog_grant_sub_space(log, &log->l_grant_write_head, + ticket->t_curr_res); ticket->t_curr_res = ticket->t_unit_res; xlog_tic_reset_res(ticket); @@ -2749,9 +2750,8 @@ xlog_regrant_reserve_log_space(xlog_t *log, return; } - xlog_grant_add_space(log, &log->l_grant_reserve_cycle, - &log->l_grant_reserve_bytes, - ticket->t_unit_res); + xlog_grant_add_space(log, &log->l_grant_reserve_head, + ticket->t_unit_res); trace_xfs_log_regrant_reserve_exit(log, ticket); @@ -2799,10 +2799,8 @@ xlog_ungrant_log_space(xlog_t *log, bytes += ticket->t_unit_res*ticket->t_cnt; } - xlog_grant_sub_space(log, &log->l_grant_reserve_cycle, - &log->l_grant_reserve_bytes, bytes); - xlog_grant_sub_space(log, &log->l_grant_write_cycle, - &log->l_grant_write_bytes, bytes); + xlog_grant_sub_space(log, &log->l_grant_reserve_head, bytes); + xlog_grant_sub_space(log, &log->l_grant_write_head, bytes); trace_xfs_log_ungrant_exit(log, ticket); @@ -3430,22 +3428,31 @@ xlog_verify_dest_ptr( STATIC void xlog_verify_grant_head(xlog_t *log, int equals) { - if (log->l_grant_reserve_cycle == log->l_grant_write_cycle) { - if (equals) - ASSERT(log->l_grant_reserve_bytes >= log->l_grant_write_bytes); - else - ASSERT(log->l_grant_reserve_bytes > log->l_grant_write_bytes); - } else { - ASSERT(log->l_grant_reserve_cycle-1 == log->l_grant_write_cycle); - ASSERT(log->l_grant_write_bytes >= log->l_grant_reserve_bytes); - } -} /* xlog_verify_grant_head */ + int reserve_cycle, reserve_space; + int write_cycle, write_space; + + xlog_crack_grant_head(&log->l_grant_reserve_head, + &reserve_cycle, &reserve_space); + xlog_crack_grant_head(&log->l_grant_write_head, + &write_cycle, &write_space); + + if (reserve_cycle == write_cycle) { + if (equals) + ASSERT(reserve_space >= write_space); + else + ASSERT(reserve_space > write_space); + } else { + ASSERT(reserve_cycle - 1 == write_cycle); + ASSERT(write_space >= reserve_space); + } +} STATIC void xlog_verify_grant_tail( struct log *log) { xfs_lsn_t tail_lsn = log->l_tail_lsn; + int cycle, space; /* * Check to make sure the grant write head didn't just over lap the @@ -3453,9 +3460,10 @@ xlog_verify_grant_tail( * Otherwise, make sure that the cycles differ by exactly one and * check the byte count. */ - if (CYCLE_LSN(tail_lsn) != log->l_grant_write_cycle) { - ASSERT(log->l_grant_write_cycle - 1 == CYCLE_LSN(tail_lsn)); - ASSERT(log->l_grant_write_bytes <= BBTOB(BLOCK_LSN(tail_lsn))); + xlog_crack_grant_head(&log->l_grant_write_head, &cycle, &space); + if (CYCLE_LSN(tail_lsn) != cycle) { + ASSERT(cycle - 1 == CYCLE_LSN(tail_lsn)); + ASSERT(space <= BBTOB(BLOCK_LSN(tail_lsn))); } } diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index d45fe2d..2fd4819 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -519,10 +519,8 @@ typedef struct log { spinlock_t l_grant_lock ____cacheline_aligned_in_smp; struct list_head l_reserveq; struct list_head l_writeq; - int l_grant_reserve_cycle; - int l_grant_reserve_bytes; - int l_grant_write_cycle; - int l_grant_write_bytes; + int64_t l_grant_reserve_head; + int64_t l_grant_write_head; /* The following field are used for debugging; need to hold icloglock */ #ifdef DEBUG @@ -559,6 +557,26 @@ int xlog_write(struct log *log, struct xfs_log_vec *log_vector, xlog_in_core_t **commit_iclog, uint flags); /* + * When we crack the grrant head, we sample it first so that the value will not + * change while we are cracking it into the component values. This means we + * will always get consistent component values to work from. + */ +static inline void +xlog_crack_grant_head(int64_t *head, int *cycle, int *space) +{ + int64_t val = *head; + + *cycle = val >> 32; + *space = val & 0xffffffff; +} + +static inline void +xlog_assign_grant_head(int64_t *head, int cycle, int space) +{ + *head = ((int64_t)cycle << 32) | space; +} + +/* * Committed Item List interfaces */ int xlog_cil_init(struct log *log); diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index e23f7be..3e91975 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -927,10 +927,10 @@ xlog_find_tail( log->l_curr_cycle++; log->l_tail_lsn = be64_to_cpu(rhead->h_tail_lsn); log->l_last_sync_lsn = be64_to_cpu(rhead->h_lsn); - log->l_grant_reserve_cycle = log->l_curr_cycle; - log->l_grant_reserve_bytes = BBTOB(log->l_curr_block); - log->l_grant_write_cycle = log->l_curr_cycle; - log->l_grant_write_bytes = BBTOB(log->l_curr_block); + xlog_assign_grant_head(&log->l_grant_reserve_head, log->l_curr_cycle, + BBTOB(log->l_curr_block)); + xlog_assign_grant_head(&log->l_grant_write_head, log->l_curr_cycle, + BBTOB(log->l_curr_block)); /* * Look for unmount record. If we find it, then we know there -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:55:19 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4tJaN160440 for ; Sun, 12 Dec 2010 22:55:19 -0600 X-ASG-Debug-ID: 1292215605-3ef7010b0002-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 49D951CBADE9 for ; Sun, 12 Dec 2010 20:46:48 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id TJXeP1tyU9t03DbI for ; Sun, 12 Dec 2010 20:46:48 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50129163-1927428 for ; Mon, 13 Dec 2010 15:16:45 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0J9-000237-PM for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:43 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0Hf-0004mq-Jh for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:45:11 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 12/12] xfs: kill useless spinlock_destroy macro Subject: [PATCH 12/12] xfs: kill useless spinlock_destroy macro Date: Mon, 13 Dec 2010 15:44:43 +1100 Message-Id: <1292215483-18224-13-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292215483-18224-1-git-send-email-david@fromorbit.com> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292215609 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner It is only used in 2 places in the log code, and is an empty macro, so get rid of it. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_linux.h | 2 -- fs/xfs/xfs_log.c | 2 -- 2 files changed, 0 insertions(+), 4 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h index ccebd86..e7cfa27 100644 --- a/fs/xfs/linux-2.6/xfs_linux.h +++ b/fs/xfs/linux-2.6/xfs_linux.h @@ -113,8 +113,6 @@ #define current_restore_flags_nested(sp, f) \ (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) -#define spinlock_destroy(lock) - #define NBBY 8 /* number of bits per byte */ /* diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 58326ba..7fadc36 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -1141,7 +1141,6 @@ out_free_iclog: xfs_buf_free(iclog->ic_bp); kmem_free(iclog); } - spinlock_destroy(&log->l_icloglock); xfs_buf_free(log->l_xbuf); out_free_log: kmem_free(log); @@ -1458,7 +1457,6 @@ xlog_dealloc_log(xlog_t *log) kmem_free(iclog); iclog = next_iclog; } - spinlock_destroy(&log->l_icloglock); xfs_buf_free(log->l_xbuf); log->l_mp->m_log = NULL; -- 1.7.2.3 From SRS0+Gu6A+16+fromorbit.com=dave@internode.on.net Sun Dec 12 22:55:19 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_65, LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD4tJtJ160433 for ; Sun, 12 Dec 2010 22:55:19 -0600 X-ASG-Debug-ID: 1292215606-0f3e03920000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 286071CBADEA for ; Sun, 12 Dec 2010 20:46:46 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id A2tfMcgsOLBEOHza for ; Sun, 12 Dec 2010 20:46:46 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49889433-1927428 for ; Mon, 13 Dec 2010 15:16:45 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0Iz-00022h-Iz for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:33 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0HV-0004md-EE for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:45:01 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 08/12] xfs: convert l_tail_lsn to an atomic variable. Subject: [PATCH 08/12] xfs: convert l_tail_lsn to an atomic variable. Date: Mon, 13 Dec 2010 15:44:39 +1100 Message-Id: <1292215483-18224-9-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292215483-18224-1-git-send-email-david@fromorbit.com> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292215608 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49273 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner log->l_tail_lsn is currently protected by the log grant lock. The lock is only needed for serialising readers against writers, so we don't really need the lock if we make the l_tail_lsn variable an atomic. Converting the l_tail_lsn variable to an atomic64_t means we can start to peel back the grant lock from various operations. Also, provide functions to safely crack an atomic LSN variable into it's component pieces and to recombined the components into an atomic variable. Use them where appropriate. This also removes the need for explicitly holding a spinlock to read the l_tail_lsn on 32 bit platforms. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_trace.h | 2 +- fs/xfs/xfs_log.c | 56 ++++++++++++++++++----------------------- fs/xfs/xfs_log_priv.h | 37 +++++++++++++++++++++++---- fs/xfs/xfs_log_recover.c | 14 ++++------ 4 files changed, 63 insertions(+), 46 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h index 82dfcd7..2f62d0f 100644 --- a/fs/xfs/linux-2.6/xfs_trace.h +++ b/fs/xfs/linux-2.6/xfs_trace.h @@ -794,7 +794,7 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, &__entry->grant_write_bytes); __entry->curr_cycle = log->l_curr_cycle; __entry->curr_block = log->l_curr_block; - __entry->tail_lsn = log->l_tail_lsn; + __entry->tail_lsn = atomic64_read(&log->l_tail_lsn); ), TP_printk("dev %d:%d type %s t_ocnt %u t_cnt %u t_curr_res %u " "t_unit_res %u t_flags %s reserve_headq 0x%p " diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 6ed6ee9..57bd143 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -678,15 +678,11 @@ xfs_log_move_tail(xfs_mount_t *mp, if (tail_lsn == 0) tail_lsn = atomic64_read(&log->l_last_sync_lsn); - spin_lock(&log->l_grant_lock); - - /* Also an invalid lsn. 1 implies that we aren't passing in a valid - * tail_lsn. - */ - if (tail_lsn != 1) { - log->l_tail_lsn = tail_lsn; - } + /* tail_lsn == 1 implies that we weren't passed a valid value. */ + if (tail_lsn != 1) + atomic64_set(&log->l_tail_lsn, tail_lsn); + spin_lock(&log->l_grant_lock); if (!list_empty(&log->l_writeq)) { #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) @@ -789,21 +785,19 @@ xfs_log_need_covered(xfs_mount_t *mp) * We may be holding the log iclog lock upon entering this routine. */ xfs_lsn_t -xlog_assign_tail_lsn(xfs_mount_t *mp) +xlog_assign_tail_lsn( + struct xfs_mount *mp) { - xfs_lsn_t tail_lsn; - xlog_t *log = mp->m_log; + xfs_lsn_t tail_lsn; + struct log *log = mp->m_log; tail_lsn = xfs_trans_ail_tail(mp->m_ail); - spin_lock(&log->l_grant_lock); if (!tail_lsn) tail_lsn = atomic64_read(&log->l_last_sync_lsn); - log->l_tail_lsn = tail_lsn; - spin_unlock(&log->l_grant_lock); + atomic64_set(&log->l_tail_lsn, tail_lsn); return tail_lsn; -} /* xlog_assign_tail_lsn */ - +} /* * Return the space in the log between the tail and the head. The head @@ -831,8 +825,8 @@ xlog_space_left( int head_bytes; xlog_crack_grant_head(head, &head_cycle, &head_bytes); - tail_bytes = BBTOB(BLOCK_LSN(log->l_tail_lsn)); - tail_cycle = CYCLE_LSN(log->l_tail_lsn); + xlog_crack_atomic_lsn(&log->l_tail_lsn, &tail_cycle, &tail_bytes); + tail_bytes = BBTOB(tail_bytes); if ((tail_cycle == head_cycle) && (head_bytes >= tail_bytes)) { free_bytes = log->l_logsize - (head_bytes - tail_bytes); } else if ((tail_cycle + 1) < head_cycle) { @@ -1009,8 +1003,8 @@ xlog_alloc_log(xfs_mount_t *mp, log->l_prev_block = -1; /* log->l_tail_lsn = 0x100000000LL; cycle = 1; current block = 0 */ - log->l_tail_lsn = xlog_assign_lsn(1, 0); - atomic64_set(&log->l_last_sync_lsn, xlog_assign_lsn(1, 0)); + xlog_assign_atomic_lsn(&log->l_tail_lsn, 1, 0); + xlog_assign_atomic_lsn(&log->l_last_sync_lsn, 1, 0); log->l_curr_cycle = 1; /* 0 is bad since this is initial value */ xlog_assign_grant_head(&log->l_grant_reserve_head, 1, 0); xlog_assign_grant_head(&log->l_grant_write_head, 1, 0); @@ -1189,7 +1183,6 @@ xlog_grant_push_ail( { xfs_lsn_t threshold_lsn = 0; xfs_lsn_t last_sync_lsn; - xfs_lsn_t tail_lsn; int free_blocks; int free_bytes; int threshold_block; @@ -1198,7 +1191,6 @@ xlog_grant_push_ail( ASSERT(BTOBB(need_bytes) < log->l_logBBsize); - tail_lsn = log->l_tail_lsn; free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); free_blocks = BTOBBT(free_bytes); @@ -1213,8 +1205,9 @@ xlog_grant_push_ail( if (free_blocks >= free_threshold) return; - threshold_block = BLOCK_LSN(tail_lsn) + free_threshold; - threshold_cycle = CYCLE_LSN(tail_lsn); + xlog_crack_atomic_lsn(&log->l_tail_lsn, &threshold_cycle, + &threshold_block); + threshold_block += free_threshold; if (threshold_block >= log->l_logBBsize) { threshold_block -= log->l_logBBsize; threshold_cycle += 1; @@ -2828,11 +2821,11 @@ xlog_state_release_iclog( if (iclog->ic_state == XLOG_STATE_WANT_SYNC) { /* update tail before writing to iclog */ - xlog_assign_tail_lsn(log->l_mp); + xfs_lsn_t tail_lsn = xlog_assign_tail_lsn(log->l_mp); sync++; iclog->ic_state = XLOG_STATE_SYNCING; - iclog->ic_header.h_tail_lsn = cpu_to_be64(log->l_tail_lsn); - xlog_verify_tail_lsn(log, iclog, log->l_tail_lsn); + iclog->ic_header.h_tail_lsn = cpu_to_be64(tail_lsn); + xlog_verify_tail_lsn(log, iclog, tail_lsn); /* cycle incremented when incrementing curr_block */ } spin_unlock(&log->l_icloglock); @@ -3435,7 +3428,7 @@ STATIC void xlog_verify_grant_tail( struct log *log) { - xfs_lsn_t tail_lsn = log->l_tail_lsn; + int tail_cycle, tail_blocks; int cycle, space; /* @@ -3445,9 +3438,10 @@ xlog_verify_grant_tail( * check the byte count. */ xlog_crack_grant_head(&log->l_grant_write_head, &cycle, &space); - if (CYCLE_LSN(tail_lsn) != cycle) { - ASSERT(cycle - 1 == CYCLE_LSN(tail_lsn)); - ASSERT(space <= BBTOB(BLOCK_LSN(tail_lsn))); + xlog_crack_atomic_lsn(&log->l_tail_lsn, &tail_cycle, &tail_blocks); + if (tail_cycle != cycle) { + ASSERT(cycle - 1 == tail_cycle); + ASSERT(space <= BBTOB(tail_blocks)); } } diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 129068c..100a410 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -54,7 +54,6 @@ struct xfs_mount; BTOBB(XLOG_MAX_ICLOGS << (xfs_sb_version_haslogv2(&log->l_mp->m_sb) ? \ XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT)) - static inline xfs_lsn_t xlog_assign_lsn(uint cycle, uint block) { return ((xfs_lsn_t)cycle << 32) | block; @@ -506,8 +505,6 @@ typedef struct log { * log entries" */ xlog_in_core_t *l_iclog; /* head log queue */ spinlock_t l_icloglock; /* grab to change iclog state */ - xfs_lsn_t l_tail_lsn; /* lsn of 1st LR with unflushed - * buffers */ int l_curr_cycle; /* Cycle number of log writes */ int l_prev_cycle; /* Cycle number before last * block increment */ @@ -522,12 +519,15 @@ typedef struct log { int64_t l_grant_write_head; /* - * l_last_sync_lsn is an atomic so it can be set and read without - * needing to hold specific locks. To avoid operations contending with - * other hot objects, place it on a separate cacheline. + * l_last_sync_lsn and l_tail_lsn are atomics so they can be set and + * read without needing to hold specific locks. To avoid operations + * contending with other hot objects, place each of them on a separate + * cacheline. */ /* lsn of last LR on disk */ atomic64_t l_last_sync_lsn ____cacheline_aligned_in_smp; + /* lsn of 1st LR with unflushed * buffers */ + atomic64_t l_tail_lsn ____cacheline_aligned_in_smp; /* The following field are used for debugging; need to hold icloglock */ #ifdef DEBUG @@ -564,6 +564,31 @@ int xlog_write(struct log *log, struct xfs_log_vec *log_vector, xlog_in_core_t **commit_iclog, uint flags); /* + * When we crack an atomic LSN, we sample it first so that the value will not + * change while we are cracking it into the component values. This means we + * will always get consistent component values to work from. This should always + * be used to smaple and crack LSNs taht are stored and updated in atomic + * variables. + */ +static inline void +xlog_crack_atomic_lsn(atomic64_t *lsn, uint *cycle, uint *block) +{ + xfs_lsn_t val = atomic64_read(lsn); + + *cycle = CYCLE_LSN(val); + *block = BLOCK_LSN(val); +} + +/* + * Calculate and assign a value to an atomic LSN variable from component pieces. + */ +static inline void +xlog_assign_atomic_lsn(atomic64_t *lsn, uint cycle, uint block) +{ + atomic64_set(lsn, xlog_assign_lsn(cycle, block)); +} + +/* * When we crack the grrant head, we sample it first so that the value will not * change while we are cracking it into the component values. This means we * will always get consistent component values to work from. diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 7e5b8ab..147fb34 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -925,7 +925,7 @@ xlog_find_tail( log->l_curr_cycle = be32_to_cpu(rhead->h_cycle); if (found == 2) log->l_curr_cycle++; - log->l_tail_lsn = be64_to_cpu(rhead->h_tail_lsn); + atomic64_set(&log->l_tail_lsn, be64_to_cpu(rhead->h_tail_lsn)); atomic64_set(&log->l_last_sync_lsn, be64_to_cpu(rhead->h_lsn)); xlog_assign_grant_head(&log->l_grant_reserve_head, log->l_curr_cycle, BBTOB(log->l_curr_block)); @@ -960,7 +960,7 @@ xlog_find_tail( } after_umount_blk = (i + hblks + (int) BTOBB(be32_to_cpu(rhead->h_len))) % log->l_logBBsize; - tail_lsn = log->l_tail_lsn; + tail_lsn = atomic64_read(&log->l_tail_lsn); if (*head_blk == after_umount_blk && be32_to_cpu(rhead->h_num_logops) == 1) { umount_data_blk = (i + hblks) % log->l_logBBsize; @@ -975,12 +975,10 @@ xlog_find_tail( * log records will point recovery to after the * current unmount record. */ - log->l_tail_lsn = - xlog_assign_lsn(log->l_curr_cycle, - after_umount_blk); - atomic64_set(&log->l_last_sync_lsn, - xlog_assign_lsn(log->l_curr_cycle, - after_umount_blk)); + xlog_assign_atomic_lsn(&log->l_tail_lsn, + log->l_curr_cycle, after_umount_blk); + xlog_assign_atomic_lsn(&log->l_last_sync_lsn, + log->l_curr_cycle, after_umount_blk); *tail_blk = after_umount_blk; /* -- 1.7.2.3 From SRS0+Ksmg+16+fromorbit.com=dave@internode.on.net Sun Dec 12 23:01:38 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,SUBJ_TICKET autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD51brA160855 for ; Sun, 12 Dec 2010 23:01:37 -0600 X-ASG-Debug-ID: 1292215585-717502330000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 802F9143F6CF for ; Sun, 12 Dec 2010 20:46:26 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id sqjVFtxLks2FKEdw for ; Sun, 12 Dec 2010 20:46:26 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49439967-1927428 for ; Mon, 13 Dec 2010 15:16:24 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0Ip-00022O-7d for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:23 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0HL-0004mF-2K for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:44:51 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 01/12] xfs: convert log grant ticket queues to list heads Subject: [PATCH 01/12] xfs: convert log grant ticket queues to list heads Date: Mon, 13 Dec 2010 15:44:32 +1100 Message-Id: <1292215483-18224-2-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292215483-18224-1-git-send-email-david@fromorbit.com> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail18.adl2.internode.on.net[150.101.137.103] X-Barracuda-Start-Time: 1292215587 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49274 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The grant write and reserve queues use a roll-your-own double linked list, so convert it to a standard list_head structure and convert all the list traversals to use list_for_each_entry(). We can also get rid of the XLOG_TIC_IN_Q flag as we can use the list_empty() check to tell if the ticket is in a list or not. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_trace.h | 12 ++-- fs/xfs/xfs_log.c | 123 ++++++++++++++---------------------------- fs/xfs/xfs_log_priv.h | 11 ++--- 3 files changed, 51 insertions(+), 95 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h index acef2e9..f400668 100644 --- a/fs/xfs/linux-2.6/xfs_trace.h +++ b/fs/xfs/linux-2.6/xfs_trace.h @@ -766,8 +766,8 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, __field(int, curr_res) __field(int, unit_res) __field(unsigned int, flags) - __field(void *, reserve_headq) - __field(void *, write_headq) + __field(void *, reserveq) + __field(void *, writeq) __field(int, grant_reserve_cycle) __field(int, grant_reserve_bytes) __field(int, grant_write_cycle) @@ -784,8 +784,8 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, __entry->curr_res = tic->t_curr_res; __entry->unit_res = tic->t_unit_res; __entry->flags = tic->t_flags; - __entry->reserve_headq = log->l_reserve_headq; - __entry->write_headq = log->l_write_headq; + __entry->reserveq = log->l_reserveq.next; + __entry->writeq = log->l_writeq.next; __entry->grant_reserve_cycle = log->l_grant_reserve_cycle; __entry->grant_reserve_bytes = log->l_grant_reserve_bytes; __entry->grant_write_cycle = log->l_grant_write_cycle; @@ -807,8 +807,8 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, __entry->curr_res, __entry->unit_res, __print_flags(__entry->flags, "|", XLOG_TIC_FLAGS), - __entry->reserve_headq, - __entry->write_headq, + __entry->reserveq, + __entry->writeq, __entry->grant_reserve_cycle, __entry->grant_reserve_bytes, __entry->grant_write_cycle, diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index cee4ab9..1b82735 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -95,38 +95,6 @@ STATIC void xlog_verify_tail_lsn(xlog_t *log, xlog_in_core_t *iclog, STATIC int xlog_iclogs_empty(xlog_t *log); - -static void -xlog_ins_ticketq(struct xlog_ticket **qp, struct xlog_ticket *tic) -{ - if (*qp) { - tic->t_next = (*qp); - tic->t_prev = (*qp)->t_prev; - (*qp)->t_prev->t_next = tic; - (*qp)->t_prev = tic; - } else { - tic->t_prev = tic->t_next = tic; - *qp = tic; - } - - tic->t_flags |= XLOG_TIC_IN_Q; -} - -static void -xlog_del_ticketq(struct xlog_ticket **qp, struct xlog_ticket *tic) -{ - if (tic == tic->t_next) { - *qp = NULL; - } else { - *qp = tic->t_next; - tic->t_next->t_prev = tic->t_prev; - tic->t_prev->t_next = tic->t_next; - } - - tic->t_next = tic->t_prev = NULL; - tic->t_flags &= ~XLOG_TIC_IN_Q; -} - static void xlog_grant_sub_space(struct log *log, int bytes) { @@ -724,7 +692,7 @@ xfs_log_move_tail(xfs_mount_t *mp, log->l_tail_lsn = tail_lsn; } - if ((tic = log->l_write_headq)) { + if (!list_empty(&log->l_writeq)) { #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); @@ -732,7 +700,7 @@ xfs_log_move_tail(xfs_mount_t *mp, cycle = log->l_grant_write_cycle; bytes = log->l_grant_write_bytes; free_bytes = xlog_space_left(log, cycle, bytes); - do { + list_for_each_entry(tic, &log->l_writeq, t_queue) { ASSERT(tic->t_flags & XLOG_TIC_PERM_RESERV); if (free_bytes < tic->t_unit_res && tail_lsn != 1) @@ -740,10 +708,10 @@ xfs_log_move_tail(xfs_mount_t *mp, tail_lsn = 0; free_bytes -= tic->t_unit_res; sv_signal(&tic->t_wait); - tic = tic->t_next; - } while (tic != log->l_write_headq); + } } - if ((tic = log->l_reserve_headq)) { + + if (!list_empty(&log->l_reserveq)) { #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); @@ -751,7 +719,7 @@ xfs_log_move_tail(xfs_mount_t *mp, cycle = log->l_grant_reserve_cycle; bytes = log->l_grant_reserve_bytes; free_bytes = xlog_space_left(log, cycle, bytes); - do { + list_for_each_entry(tic, &log->l_reserveq, t_queue) { if (tic->t_flags & XLOG_TIC_PERM_RESERV) need_bytes = tic->t_unit_res*tic->t_cnt; else @@ -761,8 +729,7 @@ xfs_log_move_tail(xfs_mount_t *mp, tail_lsn = 0; free_bytes -= need_bytes; sv_signal(&tic->t_wait); - tic = tic->t_next; - } while (tic != log->l_reserve_headq); + } } spin_unlock(&log->l_grant_lock); } /* xfs_log_move_tail */ @@ -1053,6 +1020,8 @@ xlog_alloc_log(xfs_mount_t *mp, log->l_curr_cycle = 1; /* 0 is bad since this is initial value */ log->l_grant_reserve_cycle = 1; log->l_grant_write_cycle = 1; + INIT_LIST_HEAD(&log->l_reserveq); + INIT_LIST_HEAD(&log->l_writeq); error = EFSCORRUPTED; if (xfs_sb_version_hassector(&mp->m_sb)) { @@ -2550,8 +2519,8 @@ xlog_grant_log_space(xlog_t *log, trace_xfs_log_grant_enter(log, tic); /* something is already sleeping; insert new transaction at end */ - if (log->l_reserve_headq) { - xlog_ins_ticketq(&log->l_reserve_headq, tic); + if (!list_empty(&log->l_reserveq)) { + list_add_tail(&tic->t_queue, &log->l_reserveq); trace_xfs_log_grant_sleep1(log, tic); @@ -2583,8 +2552,8 @@ redo: free_bytes = xlog_space_left(log, log->l_grant_reserve_cycle, log->l_grant_reserve_bytes); if (free_bytes < need_bytes) { - if ((tic->t_flags & XLOG_TIC_IN_Q) == 0) - xlog_ins_ticketq(&log->l_reserve_headq, tic); + if (list_empty(&tic->t_queue)) + list_add_tail(&tic->t_queue, &log->l_reserveq); trace_xfs_log_grant_sleep2(log, tic); @@ -2602,8 +2571,9 @@ redo: trace_xfs_log_grant_wake2(log, tic); goto redo; - } else if (tic->t_flags & XLOG_TIC_IN_Q) - xlog_del_ticketq(&log->l_reserve_headq, tic); + } + + list_del_init(&tic->t_queue); /* we've got enough space */ xlog_grant_add_space(log, need_bytes); @@ -2626,9 +2596,7 @@ redo: return 0; error_return: - if (tic->t_flags & XLOG_TIC_IN_Q) - xlog_del_ticketq(&log->l_reserve_headq, tic); - + list_del_init(&tic->t_queue); trace_xfs_log_grant_error(log, tic); /* @@ -2653,7 +2621,6 @@ xlog_regrant_write_log_space(xlog_t *log, xlog_ticket_t *tic) { int free_bytes, need_bytes; - xlog_ticket_t *ntic; #ifdef DEBUG xfs_lsn_t tail_lsn; #endif @@ -2683,22 +2650,23 @@ xlog_regrant_write_log_space(xlog_t *log, * this transaction. */ need_bytes = tic->t_unit_res; - if ((ntic = log->l_write_headq)) { + if (!list_empty(&log->l_writeq)) { + struct xlog_ticket *ntic; free_bytes = xlog_space_left(log, log->l_grant_write_cycle, log->l_grant_write_bytes); - do { + list_for_each_entry(ntic, &log->l_writeq, t_queue) { ASSERT(ntic->t_flags & XLOG_TIC_PERM_RESERV); if (free_bytes < ntic->t_unit_res) break; free_bytes -= ntic->t_unit_res; sv_signal(&ntic->t_wait); - ntic = ntic->t_next; - } while (ntic != log->l_write_headq); + } - if (ntic != log->l_write_headq) { - if ((tic->t_flags & XLOG_TIC_IN_Q) == 0) - xlog_ins_ticketq(&log->l_write_headq, tic); + if (ntic != list_first_entry(&log->l_writeq, + struct xlog_ticket, t_queue)) { + if (list_empty(&tic->t_queue)) + list_add_tail(&tic->t_queue, &log->l_writeq); trace_xfs_log_regrant_write_sleep1(log, tic); @@ -2727,8 +2695,8 @@ redo: free_bytes = xlog_space_left(log, log->l_grant_write_cycle, log->l_grant_write_bytes); if (free_bytes < need_bytes) { - if ((tic->t_flags & XLOG_TIC_IN_Q) == 0) - xlog_ins_ticketq(&log->l_write_headq, tic); + if (list_empty(&tic->t_queue)) + list_add_tail(&tic->t_queue, &log->l_writeq); spin_unlock(&log->l_grant_lock); xlog_grant_push_ail(log->l_mp, need_bytes); spin_lock(&log->l_grant_lock); @@ -2745,8 +2713,9 @@ redo: trace_xfs_log_regrant_write_wake2(log, tic); goto redo; - } else if (tic->t_flags & XLOG_TIC_IN_Q) - xlog_del_ticketq(&log->l_write_headq, tic); + } + + list_del_init(&tic->t_queue); /* we've got enough space */ xlog_grant_add_space_write(log, need_bytes); @@ -2766,9 +2735,7 @@ redo: error_return: - if (tic->t_flags & XLOG_TIC_IN_Q) - xlog_del_ticketq(&log->l_reserve_headq, tic); - + list_del_init(&tic->t_queue); trace_xfs_log_regrant_write_error(log, tic); /* @@ -3435,6 +3402,7 @@ xlog_ticket_alloc( } atomic_set(&tic->t_ref, 1); + INIT_LIST_HEAD(&tic->t_queue); tic->t_unit_res = unit_bytes; tic->t_curr_res = unit_bytes; tic->t_cnt = cnt; @@ -3742,26 +3710,17 @@ xfs_log_force_umount( spin_unlock(&log->l_icloglock); /* - * We don't want anybody waiting for log reservations - * after this. That means we have to wake up everybody - * queued up on reserve_headq as well as write_headq. - * In addition, we make sure in xlog_{re}grant_log_space - * that we don't enqueue anything once the SHUTDOWN flag - * is set, and this action is protected by the GRANTLOCK. + * We don't want anybody waiting for log reservations after this. That + * means we have to wake up everybody queued up on reserveq as well as + * writeq. In addition, we make sure in xlog_{re}grant_log_space that + * we don't enqueue anything once the SHUTDOWN flag is set, and this + * action is protected by the GRANTLOCK. */ - if ((tic = log->l_reserve_headq)) { - do { - sv_signal(&tic->t_wait); - tic = tic->t_next; - } while (tic != log->l_reserve_headq); - } + list_for_each_entry(tic, &log->l_reserveq, t_queue) + sv_signal(&tic->t_wait); - if ((tic = log->l_write_headq)) { - do { - sv_signal(&tic->t_wait); - tic = tic->t_next; - } while (tic != log->l_write_headq); - } + list_for_each_entry(tic, &log->l_writeq, t_queue) + sv_signal(&tic->t_wait); spin_unlock(&log->l_grant_lock); if (!(log->l_iclog->ic_state & XLOG_STATE_IOERROR)) { diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index edcdfe0..d45fe2d 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -133,12 +133,10 @@ static inline uint xlog_get_client_id(__be32 i) */ #define XLOG_TIC_INITED 0x1 /* has been initialized */ #define XLOG_TIC_PERM_RESERV 0x2 /* permanent reservation */ -#define XLOG_TIC_IN_Q 0x4 #define XLOG_TIC_FLAGS \ { XLOG_TIC_INITED, "XLOG_TIC_INITED" }, \ - { XLOG_TIC_PERM_RESERV, "XLOG_TIC_PERM_RESERV" }, \ - { XLOG_TIC_IN_Q, "XLOG_TIC_IN_Q" } + { XLOG_TIC_PERM_RESERV, "XLOG_TIC_PERM_RESERV" } #endif /* __KERNEL__ */ @@ -245,8 +243,7 @@ typedef struct xlog_res { typedef struct xlog_ticket { sv_t t_wait; /* ticket wait queue : 20 */ - struct xlog_ticket *t_next; /* :4|8 */ - struct xlog_ticket *t_prev; /* :4|8 */ + struct list_head t_queue; /* reserve/write queue */ xlog_tid_t t_tid; /* transaction identifier : 4 */ atomic_t t_ref; /* ticket reference count : 4 */ int t_curr_res; /* current reservation in bytes : 4 */ @@ -520,8 +517,8 @@ typedef struct log { /* The following block of fields are changed while holding grant_lock */ spinlock_t l_grant_lock ____cacheline_aligned_in_smp; - xlog_ticket_t *l_reserve_headq; - xlog_ticket_t *l_write_headq; + struct list_head l_reserveq; + struct list_head l_writeq; int l_grant_reserve_cycle; int l_grant_reserve_bytes; int l_grant_write_cycle; -- 1.7.2.3 From SRS0+gPCZ+16+fromorbit.com=dave@internode.on.net Sun Dec 12 23:01:38 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD51bPU160857 for ; Sun, 12 Dec 2010 23:01:37 -0600 X-ASG-Debug-ID: 1292215605-645802fe0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 076F0143FE54 for ; Sun, 12 Dec 2010 20:46:45 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id OQPzAMewCePS6iZt for ; Sun, 12 Dec 2010 20:46:45 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49755639-1927428 for ; Mon, 13 Dec 2010 15:16:44 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0J9-00022e-Eg for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:43 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0HV-0004mX-As for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:45:01 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 06/12] xfs: make AIL tail pushing independent of the grant lock Subject: [PATCH 06/12] xfs: make AIL tail pushing independent of the grant lock Date: Mon, 13 Dec 2010 15:44:37 +1100 Message-Id: <1292215483-18224-7-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292215483-18224-1-git-send-email-david@fromorbit.com> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1292215607 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49274 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The xlog_grant_push_ail() currently takes the grant lock internally to sample the tail lsn, last sync lsn and the reserve grant head. Most of the callers already hold the grant lock but have to drop it before calling xlog_grant_push_ail(). This is a left over from when the AIL tail pushing was done in line and hence xlog_grant_push_ail had to drop the grant lock. AIL push is now done in another thread and hence we can safely hold the grant lock over the entire xlog_grant_push_ail call. Push the grant lock outside of xlog_grant_push_ail() to simplify the locking and synchronisation needed for tail pushing. This will reduce traffic on the grant lock by itself, but this is only one step in preparing for the complete removal of the grant lock. While there, clean up the formatting of xlog_grant_push_ail() to match the rest of the XFS code. Signed-off-by: Dave Chinner --- fs/xfs/xfs_log.c | 111 ++++++++++++++++++++++++++--------------------------- 1 files changed, 54 insertions(+), 57 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 3656d77..d15bd5b 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -70,7 +70,7 @@ STATIC void xlog_state_want_sync(xlog_t *log, xlog_in_core_t *iclog); /* local functions to manipulate grant head */ STATIC int xlog_grant_log_space(xlog_t *log, xlog_ticket_t *xtic); -STATIC void xlog_grant_push_ail(xfs_mount_t *mp, +STATIC void xlog_grant_push_ail(struct log *log, int need_bytes); STATIC void xlog_regrant_reserve_log_space(xlog_t *log, xlog_ticket_t *ticket); @@ -318,7 +318,9 @@ xfs_log_reserve( trace_xfs_log_reserve(log, internal_ticket); - xlog_grant_push_ail(mp, internal_ticket->t_unit_res); + spin_lock(&log->l_grant_lock); + xlog_grant_push_ail(log, internal_ticket->t_unit_res); + spin_unlock(&log->l_grant_lock); retval = xlog_regrant_write_log_space(log, internal_ticket); } else { /* may sleep if need to allocate more tickets */ @@ -332,9 +334,11 @@ xfs_log_reserve( trace_xfs_log_reserve(log, internal_ticket); - xlog_grant_push_ail(mp, + spin_lock(&log->l_grant_lock); + xlog_grant_push_ail(log, (internal_ticket->t_unit_res * internal_ticket->t_cnt)); + spin_unlock(&log->l_grant_lock); retval = xlog_grant_log_space(log, internal_ticket); } @@ -1185,59 +1189,58 @@ xlog_commit_record( * water mark. In this manner, we would be creating a low water mark. */ STATIC void -xlog_grant_push_ail(xfs_mount_t *mp, - int need_bytes) +xlog_grant_push_ail( + struct log *log, + int need_bytes) { - xlog_t *log = mp->m_log; /* pointer to the log */ - xfs_lsn_t tail_lsn; /* lsn of the log tail */ - xfs_lsn_t threshold_lsn = 0; /* lsn we'd like to be at */ - int free_blocks; /* free blocks left to write to */ - int free_bytes; /* free bytes left to write to */ - int threshold_block; /* block in lsn we'd like to be at */ - int threshold_cycle; /* lsn cycle we'd like to be at */ - int free_threshold; - - ASSERT(BTOBB(need_bytes) < log->l_logBBsize); - - spin_lock(&log->l_grant_lock); - free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); - tail_lsn = log->l_tail_lsn; - free_blocks = BTOBBT(free_bytes); - - /* - * Set the threshold for the minimum number of free blocks in the - * log to the maximum of what the caller needs, one quarter of the - * log, and 256 blocks. - */ - free_threshold = BTOBB(need_bytes); - free_threshold = MAX(free_threshold, (log->l_logBBsize >> 2)); - free_threshold = MAX(free_threshold, 256); - if (free_blocks < free_threshold) { + xfs_lsn_t threshold_lsn = 0; + xfs_lsn_t tail_lsn; + int free_blocks; + int free_bytes; + int threshold_block; + int threshold_cycle; + int free_threshold; + + ASSERT(BTOBB(need_bytes) < log->l_logBBsize); + + tail_lsn = log->l_tail_lsn; + free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); + free_blocks = BTOBBT(free_bytes); + + /* + * Set the threshold for the minimum number of free blocks in the + * log to the maximum of what the caller needs, one quarter of the + * log, and 256 blocks. + */ + free_threshold = BTOBB(need_bytes); + free_threshold = MAX(free_threshold, (log->l_logBBsize >> 2)); + free_threshold = MAX(free_threshold, 256); + if (free_blocks >= free_threshold) + return; + threshold_block = BLOCK_LSN(tail_lsn) + free_threshold; threshold_cycle = CYCLE_LSN(tail_lsn); if (threshold_block >= log->l_logBBsize) { - threshold_block -= log->l_logBBsize; - threshold_cycle += 1; + threshold_block -= log->l_logBBsize; + threshold_cycle += 1; } - threshold_lsn = xlog_assign_lsn(threshold_cycle, threshold_block); - - /* Don't pass in an lsn greater than the lsn of the last + threshold_lsn = xlog_assign_lsn(threshold_cycle, + threshold_block); + /* + * Don't pass in an lsn greater than the lsn of the last * log record known to be on disk. */ if (XFS_LSN_CMP(threshold_lsn, log->l_last_sync_lsn) > 0) - threshold_lsn = log->l_last_sync_lsn; - } - spin_unlock(&log->l_grant_lock); - - /* - * Get the transaction layer to kick the dirty buffers out to - * disk asynchronously. No point in trying to do this if - * the filesystem is shutting down. - */ - if (threshold_lsn && - !XLOG_FORCED_SHUTDOWN(log)) - xfs_trans_ail_push(log->l_ailp, threshold_lsn); -} /* xlog_grant_push_ail */ + threshold_lsn = log->l_last_sync_lsn; + + /* + * Get the transaction layer to kick the dirty buffers out to + * disk asynchronously. No point in trying to do this if + * the filesystem is shutting down. + */ + if (!XLOG_FORCED_SHUTDOWN(log)) + xfs_trans_ail_push(log->l_ailp, threshold_lsn); +} /* * The bdstrat callback function for log bufs. This gives us a central @@ -2543,9 +2546,7 @@ redo: trace_xfs_log_grant_sleep2(log, tic); - spin_unlock(&log->l_grant_lock); - xlog_grant_push_ail(log->l_mp, need_bytes); - spin_lock(&log->l_grant_lock); + xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); xlog_wait(&tic->t_wait, &log->l_grant_lock); @@ -2641,9 +2642,7 @@ xlog_regrant_write_log_space(xlog_t *log, trace_xfs_log_regrant_write_sleep1(log, tic); - spin_unlock(&log->l_grant_lock); - xlog_grant_push_ail(log->l_mp, need_bytes); - spin_lock(&log->l_grant_lock); + xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); xlog_wait(&tic->t_wait, &log->l_grant_lock); @@ -2666,9 +2665,7 @@ redo: if (free_bytes < need_bytes) { if (list_empty(&tic->t_queue)) list_add_tail(&tic->t_queue, &log->l_writeq); - spin_unlock(&log->l_grant_lock); - xlog_grant_push_ail(log->l_mp, need_bytes); - spin_lock(&log->l_grant_lock); + xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); trace_xfs_log_regrant_write_sleep2(log, tic); -- 1.7.2.3 From SRS0+w8Wj+16+fromorbit.com=dave@internode.on.net Sun Dec 12 23:01:38 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.9 required=5.0 tests=BAYES_00,LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD51bKe160856 for ; Sun, 12 Dec 2010 23:01:37 -0600 X-ASG-Debug-ID: 1292215595-63ba03290000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B6069143FE4C for ; Sun, 12 Dec 2010 20:46:35 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id eFNZ4S1CxXdsarhY for ; Sun, 12 Dec 2010 20:46:35 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 4436859-1927428 for ; Mon, 13 Dec 2010 15:16:34 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0Iz-00022f-HJ for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:33 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0HV-0004ma-Ca for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:45:01 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 07/12] xfs: convert l_last_sync_lsn to an atomic variable Subject: [PATCH 07/12] xfs: convert l_last_sync_lsn to an atomic variable Date: Mon, 13 Dec 2010 15:44:38 +1100 Message-Id: <1292215483-18224-8-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292215483-18224-1-git-send-email-david@fromorbit.com> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292215596 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49274 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner log->l_last_sync_lsn is updated in only one critical spot - log buffer Io completion - and is protected by the grant lock here. This requires the grant lock to be taken for every log buffer IO completion. Converting the l_last_sync_lsn variable to an atomic64_t means that we do not need to take the grant lock in log buffer IO completion to update it. This also removes the need for explicitly holding a spinlock to read the l_last_sync_lsn on 32 bit platforms. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_log.c | 55 +++++++++++++++++++++------------------------- fs/xfs/xfs_log_priv.h | 9 ++++++- fs/xfs/xfs_log_recover.c | 6 ++-- 3 files changed, 36 insertions(+), 34 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index d15bd5b..6ed6ee9 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -675,12 +675,8 @@ xfs_log_move_tail(xfs_mount_t *mp, if (XLOG_FORCED_SHUTDOWN(log)) return; - if (tail_lsn == 0) { - /* needed since sync_lsn is 64 bits */ - spin_lock(&log->l_icloglock); - tail_lsn = log->l_last_sync_lsn; - spin_unlock(&log->l_icloglock); - } + if (tail_lsn == 0) + tail_lsn = atomic64_read(&log->l_last_sync_lsn); spin_lock(&log->l_grant_lock); @@ -800,11 +796,9 @@ xlog_assign_tail_lsn(xfs_mount_t *mp) tail_lsn = xfs_trans_ail_tail(mp->m_ail); spin_lock(&log->l_grant_lock); - if (tail_lsn != 0) { - log->l_tail_lsn = tail_lsn; - } else { - tail_lsn = log->l_tail_lsn = log->l_last_sync_lsn; - } + if (!tail_lsn) + tail_lsn = atomic64_read(&log->l_last_sync_lsn); + log->l_tail_lsn = tail_lsn; spin_unlock(&log->l_grant_lock); return tail_lsn; @@ -1014,9 +1008,9 @@ xlog_alloc_log(xfs_mount_t *mp, log->l_flags |= XLOG_ACTIVE_RECOVERY; log->l_prev_block = -1; - log->l_tail_lsn = xlog_assign_lsn(1, 0); /* log->l_tail_lsn = 0x100000000LL; cycle = 1; current block = 0 */ - log->l_last_sync_lsn = log->l_tail_lsn; + log->l_tail_lsn = xlog_assign_lsn(1, 0); + atomic64_set(&log->l_last_sync_lsn, xlog_assign_lsn(1, 0)); log->l_curr_cycle = 1; /* 0 is bad since this is initial value */ xlog_assign_grant_head(&log->l_grant_reserve_head, 1, 0); xlog_assign_grant_head(&log->l_grant_write_head, 1, 0); @@ -1194,6 +1188,7 @@ xlog_grant_push_ail( int need_bytes) { xfs_lsn_t threshold_lsn = 0; + xfs_lsn_t last_sync_lsn; xfs_lsn_t tail_lsn; int free_blocks; int free_bytes; @@ -1228,10 +1223,12 @@ xlog_grant_push_ail( threshold_block); /* * Don't pass in an lsn greater than the lsn of the last - * log record known to be on disk. + * log record known to be on disk. Use a snapshot of the last sync lsn + * so that it doesn't change between the compare and the set. */ - if (XFS_LSN_CMP(threshold_lsn, log->l_last_sync_lsn) > 0) - threshold_lsn = log->l_last_sync_lsn; + last_sync_lsn = atomic64_read(&log->l_last_sync_lsn); + if (XFS_LSN_CMP(threshold_lsn, last_sync_lsn) > 0) + threshold_lsn = last_sync_lsn; /* * Get the transaction layer to kick the dirty buffers out to @@ -2194,7 +2191,7 @@ xlog_state_do_callback( lowest_lsn = xlog_get_lowest_lsn(log); if (lowest_lsn && XFS_LSN_CMP(lowest_lsn, - be64_to_cpu(iclog->ic_header.h_lsn)) < 0) { + be64_to_cpu(iclog->ic_header.h_lsn)) < 0) { iclog = iclog->ic_next; continue; /* Leave this iclog for * another thread */ @@ -2202,23 +2199,21 @@ xlog_state_do_callback( iclog->ic_state = XLOG_STATE_CALLBACK; - spin_unlock(&log->l_icloglock); - /* l_last_sync_lsn field protected by - * l_grant_lock. Don't worry about iclog's lsn. - * No one else can be here except us. + /* + * update the last_sync_lsn before we drop the + * icloglock to ensure we are the only one that + * can update it. */ - spin_lock(&log->l_grant_lock); - ASSERT(XFS_LSN_CMP(log->l_last_sync_lsn, - be64_to_cpu(iclog->ic_header.h_lsn)) <= 0); - log->l_last_sync_lsn = - be64_to_cpu(iclog->ic_header.h_lsn); - spin_unlock(&log->l_grant_lock); + ASSERT(XFS_LSN_CMP(atomic64_read(&log->l_last_sync_lsn), + be64_to_cpu(iclog->ic_header.h_lsn)) <= 0); + atomic64_set(&log->l_last_sync_lsn, + be64_to_cpu(iclog->ic_header.h_lsn)); - } else { - spin_unlock(&log->l_icloglock); + } else ioerrors++; - } + + spin_unlock(&log->l_icloglock); /* * Keep processing entries in the callback list until diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 84c5e79..129068c 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -508,7 +508,6 @@ typedef struct log { spinlock_t l_icloglock; /* grab to change iclog state */ xfs_lsn_t l_tail_lsn; /* lsn of 1st LR with unflushed * buffers */ - xfs_lsn_t l_last_sync_lsn;/* lsn of last LR on disk */ int l_curr_cycle; /* Cycle number of log writes */ int l_prev_cycle; /* Cycle number before last * block increment */ @@ -522,6 +521,14 @@ typedef struct log { int64_t l_grant_reserve_head; int64_t l_grant_write_head; + /* + * l_last_sync_lsn is an atomic so it can be set and read without + * needing to hold specific locks. To avoid operations contending with + * other hot objects, place it on a separate cacheline. + */ + /* lsn of last LR on disk */ + atomic64_t l_last_sync_lsn ____cacheline_aligned_in_smp; + /* The following field are used for debugging; need to hold icloglock */ #ifdef DEBUG char *l_iclog_bak[XLOG_MAX_ICLOGS]; diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 3e91975..7e5b8ab 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -926,7 +926,7 @@ xlog_find_tail( if (found == 2) log->l_curr_cycle++; log->l_tail_lsn = be64_to_cpu(rhead->h_tail_lsn); - log->l_last_sync_lsn = be64_to_cpu(rhead->h_lsn); + atomic64_set(&log->l_last_sync_lsn, be64_to_cpu(rhead->h_lsn)); xlog_assign_grant_head(&log->l_grant_reserve_head, log->l_curr_cycle, BBTOB(log->l_curr_block)); xlog_assign_grant_head(&log->l_grant_write_head, log->l_curr_cycle, @@ -978,9 +978,9 @@ xlog_find_tail( log->l_tail_lsn = xlog_assign_lsn(log->l_curr_cycle, after_umount_blk); - log->l_last_sync_lsn = + atomic64_set(&log->l_last_sync_lsn, xlog_assign_lsn(log->l_curr_cycle, - after_umount_blk); + after_umount_blk)); *tail_blk = after_umount_blk; /* -- 1.7.2.3 From SRS0+Gu6A+16+fromorbit.com=dave@internode.on.net Sun Dec 12 23:01:38 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_57 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD51bVj160854 for ; Sun, 12 Dec 2010 23:01:37 -0600 X-ASG-Debug-ID: 1292215596-63be02f70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D5D04143FE50 for ; Sun, 12 Dec 2010 20:46:36 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id z9dljIF2TUYtAksJ for ; Sun, 12 Dec 2010 20:46:36 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49889413-1927428 for ; Mon, 13 Dec 2010 15:16:35 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PS0Iz-00022c-Dz for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:46:33 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PS0HV-0004mU-9E for xfs@oss.sgi.com; Mon, 13 Dec 2010 15:45:01 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 05/12] xfs: use wait queues directly for the log wait queues Subject: [PATCH 05/12] xfs: use wait queues directly for the log wait queues Date: Mon, 13 Dec 2010 15:44:36 +1100 Message-Id: <1292215483-18224-6-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292215483-18224-1-git-send-email-david@fromorbit.com> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292215597 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49274 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The log grant queues are one of the few places left using sv_t constructs for waiting. Given we are touching this code, we should convert them to plain wait queues. While there, convert all the other sv_t users in the log code as well. Seeing as this removes the last users of the sv_t type, remove the header file defining the wrapper and the fragments that still reference it. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/sv.h | 59 -------------------------------------- fs/xfs/linux-2.6/xfs_linux.h | 1 - fs/xfs/quota/xfs_dquot.c | 1 - fs/xfs/xfs_log.c | 64 ++++++++++++++++++----------------------- fs/xfs/xfs_log_cil.c | 8 ++-- fs/xfs/xfs_log_priv.h | 25 +++++++++++++--- 6 files changed, 52 insertions(+), 106 deletions(-) delete mode 100644 fs/xfs/linux-2.6/sv.h diff --git a/fs/xfs/linux-2.6/sv.h b/fs/xfs/linux-2.6/sv.h deleted file mode 100644 index 4dfc7c3..0000000 --- a/fs/xfs/linux-2.6/sv.h +++ /dev/null @@ -1,59 +0,0 @@ -/* - * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. - * All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it would be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#ifndef __XFS_SUPPORT_SV_H__ -#define __XFS_SUPPORT_SV_H__ - -#include -#include -#include - -/* - * Synchronisation variables. - * - * (Parameters "pri", "svf" and "rts" are not implemented) - */ - -typedef struct sv_s { - wait_queue_head_t waiters; -} sv_t; - -static inline void _sv_wait(sv_t *sv, spinlock_t *lock) -{ - DECLARE_WAITQUEUE(wait, current); - - add_wait_queue_exclusive(&sv->waiters, &wait); - __set_current_state(TASK_UNINTERRUPTIBLE); - spin_unlock(lock); - - schedule(); - - remove_wait_queue(&sv->waiters, &wait); -} - -#define sv_init(sv,flag,name) \ - init_waitqueue_head(&(sv)->waiters) -#define sv_destroy(sv) \ - /*NOTHING*/ -#define sv_wait(sv, pri, lock, s) \ - _sv_wait(sv, lock) -#define sv_signal(sv) \ - wake_up(&(sv)->waiters) -#define sv_broadcast(sv) \ - wake_up_all(&(sv)->waiters) - -#endif /* __XFS_SUPPORT_SV_H__ */ diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h index 9fa4f2a..ccebd86 100644 --- a/fs/xfs/linux-2.6/xfs_linux.h +++ b/fs/xfs/linux-2.6/xfs_linux.h @@ -37,7 +37,6 @@ #include #include -#include #include #include diff --git a/fs/xfs/quota/xfs_dquot.c b/fs/xfs/quota/xfs_dquot.c index faf8e1a..d22aa31 100644 --- a/fs/xfs/quota/xfs_dquot.c +++ b/fs/xfs/quota/xfs_dquot.c @@ -149,7 +149,6 @@ xfs_qm_dqdestroy( ASSERT(list_empty(&dqp->q_freelist)); mutex_destroy(&dqp->q_qlock); - sv_destroy(&dqp->q_pinwait); kmem_zone_free(xfs_Gqm->qm_dqzone, dqp); atomic_dec(&xfs_Gqm->qm_totaldquots); diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 3299faa..3656d77 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -547,8 +547,8 @@ xfs_log_unmount_write(xfs_mount_t *mp) if (!(iclog->ic_state == XLOG_STATE_ACTIVE || iclog->ic_state == XLOG_STATE_DIRTY)) { if (!XLOG_FORCED_SHUTDOWN(log)) { - sv_wait(&iclog->ic_force_wait, PMEM, - &log->l_icloglock, s); + xlog_wait(&iclog->ic_force_wait, + &log->l_icloglock); } else { spin_unlock(&log->l_icloglock); } @@ -588,8 +588,8 @@ xfs_log_unmount_write(xfs_mount_t *mp) || iclog->ic_state == XLOG_STATE_DIRTY || iclog->ic_state == XLOG_STATE_IOERROR) ) { - sv_wait(&iclog->ic_force_wait, PMEM, - &log->l_icloglock, s); + xlog_wait(&iclog->ic_force_wait, + &log->l_icloglock); } else { spin_unlock(&log->l_icloglock); } @@ -700,7 +700,7 @@ xfs_log_move_tail(xfs_mount_t *mp, break; tail_lsn = 0; free_bytes -= tic->t_unit_res; - sv_signal(&tic->t_wait); + wake_up(&tic->t_wait); } } @@ -719,7 +719,7 @@ xfs_log_move_tail(xfs_mount_t *mp, break; tail_lsn = 0; free_bytes -= need_bytes; - sv_signal(&tic->t_wait); + wake_up(&tic->t_wait); } } spin_unlock(&log->l_grant_lock); @@ -1060,7 +1060,7 @@ xlog_alloc_log(xfs_mount_t *mp, spin_lock_init(&log->l_icloglock); spin_lock_init(&log->l_grant_lock); - sv_init(&log->l_flush_wait, 0, "flush_wait"); + init_waitqueue_head(&log->l_flush_wait); /* log record size must be multiple of BBSIZE; see xlog_rec_header_t */ ASSERT((XFS_BUF_SIZE(bp) & BBMASK) == 0); @@ -1116,8 +1116,8 @@ xlog_alloc_log(xfs_mount_t *mp, ASSERT(XFS_BUF_ISBUSY(iclog->ic_bp)); ASSERT(XFS_BUF_VALUSEMA(iclog->ic_bp) <= 0); - sv_init(&iclog->ic_force_wait, SV_DEFAULT, "iclog-force"); - sv_init(&iclog->ic_write_wait, SV_DEFAULT, "iclog-write"); + init_waitqueue_head(&iclog->ic_force_wait); + init_waitqueue_head(&iclog->ic_write_wait); iclogp = &iclog->ic_next; } @@ -1132,11 +1132,8 @@ xlog_alloc_log(xfs_mount_t *mp, out_free_iclog: for (iclog = log->l_iclog; iclog; iclog = prev_iclog) { prev_iclog = iclog->ic_next; - if (iclog->ic_bp) { - sv_destroy(&iclog->ic_force_wait); - sv_destroy(&iclog->ic_write_wait); + if (iclog->ic_bp) xfs_buf_free(iclog->ic_bp); - } kmem_free(iclog); } spinlock_destroy(&log->l_icloglock); @@ -1453,8 +1450,6 @@ xlog_dealloc_log(xlog_t *log) iclog = log->l_iclog; for (i=0; il_iclog_bufs; i++) { - sv_destroy(&iclog->ic_force_wait); - sv_destroy(&iclog->ic_write_wait); xfs_buf_free(iclog->ic_bp); next_iclog = iclog->ic_next; kmem_free(iclog); @@ -2261,7 +2256,7 @@ xlog_state_do_callback( xlog_state_clean_log(log); /* wake up threads waiting in xfs_log_force() */ - sv_broadcast(&iclog->ic_force_wait); + wake_up_all(&iclog->ic_force_wait); iclog = iclog->ic_next; } while (first_iclog != iclog); @@ -2308,7 +2303,7 @@ xlog_state_do_callback( spin_unlock(&log->l_icloglock); if (wake) - sv_broadcast(&log->l_flush_wait); + wake_up_all(&log->l_flush_wait); } @@ -2359,7 +2354,7 @@ xlog_state_done_syncing( * iclog buffer, we wake them all, one will get to do the * I/O, the others get to wait for the result. */ - sv_broadcast(&iclog->ic_write_wait); + wake_up_all(&iclog->ic_write_wait); spin_unlock(&log->l_icloglock); xlog_state_do_callback(log, aborted, iclog); /* also cleans log */ } /* xlog_state_done_syncing */ @@ -2408,7 +2403,7 @@ restart: XFS_STATS_INC(xs_log_noiclogs); /* Wait for log writes to have flushed */ - sv_wait(&log->l_flush_wait, 0, &log->l_icloglock, 0); + xlog_wait(&log->l_flush_wait, &log->l_icloglock); goto restart; } @@ -2523,7 +2518,8 @@ xlog_grant_log_space(xlog_t *log, goto error_return; XFS_STATS_INC(xs_sleep_logspace); - sv_wait(&tic->t_wait, PINOD|PLTWAIT, &log->l_grant_lock, s); + xlog_wait(&tic->t_wait, &log->l_grant_lock); + /* * If we got an error, and the filesystem is shutting down, * we'll catch it down below. So just continue... @@ -2552,7 +2548,7 @@ redo: spin_lock(&log->l_grant_lock); XFS_STATS_INC(xs_sleep_logspace); - sv_wait(&tic->t_wait, PINOD|PLTWAIT, &log->l_grant_lock, s); + xlog_wait(&tic->t_wait, &log->l_grant_lock); spin_lock(&log->l_grant_lock); if (XLOG_FORCED_SHUTDOWN(log)) @@ -2635,7 +2631,7 @@ xlog_regrant_write_log_space(xlog_t *log, if (free_bytes < ntic->t_unit_res) break; free_bytes -= ntic->t_unit_res; - sv_signal(&ntic->t_wait); + wake_up(&ntic->t_wait); } if (ntic != list_first_entry(&log->l_writeq, @@ -2650,8 +2646,7 @@ xlog_regrant_write_log_space(xlog_t *log, spin_lock(&log->l_grant_lock); XFS_STATS_INC(xs_sleep_logspace); - sv_wait(&tic->t_wait, PINOD|PLTWAIT, - &log->l_grant_lock, s); + xlog_wait(&tic->t_wait, &log->l_grant_lock); /* If we're shutting down, this tic is already * off the queue */ @@ -2677,8 +2672,7 @@ redo: XFS_STATS_INC(xs_sleep_logspace); trace_xfs_log_regrant_write_sleep2(log, tic); - - sv_wait(&tic->t_wait, PINOD|PLTWAIT, &log->l_grant_lock, s); + xlog_wait(&tic->t_wait, &log->l_grant_lock); /* If we're shutting down, this tic is already off the queue */ spin_lock(&log->l_grant_lock); @@ -3029,7 +3023,7 @@ maybe_sleep: return XFS_ERROR(EIO); } XFS_STATS_INC(xs_log_force_sleep); - sv_wait(&iclog->ic_force_wait, PINOD, &log->l_icloglock, s); + xlog_wait(&iclog->ic_force_wait, &log->l_icloglock); /* * No need to grab the log lock here since we're * only deciding whether or not to return EIO @@ -3147,8 +3141,8 @@ try_again: XFS_STATS_INC(xs_log_force_sleep); - sv_wait(&iclog->ic_prev->ic_write_wait, - PSWP, &log->l_icloglock, s); + xlog_wait(&iclog->ic_prev->ic_write_wait, + &log->l_icloglock); if (log_flushed) *log_flushed = 1; already_slept = 1; @@ -3176,7 +3170,7 @@ try_again: return XFS_ERROR(EIO); } XFS_STATS_INC(xs_log_force_sleep); - sv_wait(&iclog->ic_force_wait, PSWP, &log->l_icloglock, s); + xlog_wait(&iclog->ic_force_wait, &log->l_icloglock); /* * No need to grab the log lock here since we're * only deciding whether or not to return EIO @@ -3251,10 +3245,8 @@ xfs_log_ticket_put( xlog_ticket_t *ticket) { ASSERT(atomic_read(&ticket->t_ref) > 0); - if (atomic_dec_and_test(&ticket->t_ref)) { - sv_destroy(&ticket->t_wait); + if (atomic_dec_and_test(&ticket->t_ref)) kmem_zone_free(xfs_log_ticket_zone, ticket); - } } xlog_ticket_t * @@ -3387,7 +3379,7 @@ xlog_ticket_alloc( tic->t_trans_type = 0; if (xflags & XFS_LOG_PERM_RESERV) tic->t_flags |= XLOG_TIC_PERM_RESERV; - sv_init(&tic->t_wait, SV_DEFAULT, "logtick"); + init_waitqueue_head(&tic->t_wait); xlog_tic_reset_res(tic); @@ -3719,10 +3711,10 @@ xfs_log_force_umount( * action is protected by the GRANTLOCK. */ list_for_each_entry(tic, &log->l_reserveq, t_queue) - sv_signal(&tic->t_wait); + wake_up(&tic->t_wait); list_for_each_entry(tic, &log->l_writeq, t_queue) - sv_signal(&tic->t_wait); + wake_up(&tic->t_wait); spin_unlock(&log->l_grant_lock); if (!(log->l_iclog->ic_state & XLOG_STATE_IOERROR)) { diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c index f36f1a2..9dc8125 100644 --- a/fs/xfs/xfs_log_cil.c +++ b/fs/xfs/xfs_log_cil.c @@ -61,7 +61,7 @@ xlog_cil_init( INIT_LIST_HEAD(&cil->xc_committing); spin_lock_init(&cil->xc_cil_lock); init_rwsem(&cil->xc_ctx_lock); - sv_init(&cil->xc_commit_wait, SV_DEFAULT, "cilwait"); + init_waitqueue_head(&cil->xc_commit_wait); INIT_LIST_HEAD(&ctx->committing); INIT_LIST_HEAD(&ctx->busy_extents); @@ -563,7 +563,7 @@ restart: * It is still being pushed! Wait for the push to * complete, then start again from the beginning. */ - sv_wait(&cil->xc_commit_wait, 0, &cil->xc_cil_lock, 0); + xlog_wait(&cil->xc_commit_wait, &cil->xc_cil_lock); goto restart; } } @@ -587,7 +587,7 @@ restart: */ spin_lock(&cil->xc_cil_lock); ctx->commit_lsn = commit_lsn; - sv_broadcast(&cil->xc_commit_wait); + wake_up_all(&cil->xc_commit_wait); spin_unlock(&cil->xc_cil_lock); /* release the hounds! */ @@ -752,7 +752,7 @@ restart: * It is still being pushed! Wait for the push to * complete, then start again from the beginning. */ - sv_wait(&cil->xc_commit_wait, 0, &cil->xc_cil_lock, 0); + xlog_wait(&cil->xc_commit_wait, &cil->xc_cil_lock); goto restart; } if (ctx->sequence != sequence) diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 2fd4819..84c5e79 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -242,7 +242,7 @@ typedef struct xlog_res { } xlog_res_t; typedef struct xlog_ticket { - sv_t t_wait; /* ticket wait queue : 20 */ + wait_queue_head_t t_wait; /* ticket wait queue */ struct list_head t_queue; /* reserve/write queue */ xlog_tid_t t_tid; /* transaction identifier : 4 */ atomic_t t_ref; /* ticket reference count : 4 */ @@ -350,8 +350,8 @@ typedef union xlog_in_core2 { * and move everything else out to subsequent cachelines. */ typedef struct xlog_in_core { - sv_t ic_force_wait; - sv_t ic_write_wait; + wait_queue_head_t ic_force_wait; + wait_queue_head_t ic_write_wait; struct xlog_in_core *ic_next; struct xlog_in_core *ic_prev; struct xfs_buf *ic_bp; @@ -418,7 +418,7 @@ struct xfs_cil { struct xfs_cil_ctx *xc_ctx; struct rw_semaphore xc_ctx_lock; struct list_head xc_committing; - sv_t xc_commit_wait; + wait_queue_head_t xc_commit_wait; xfs_lsn_t xc_current_sequence; }; @@ -500,7 +500,7 @@ typedef struct log { int l_logBBsize; /* size of log in BB chunks */ /* The following block of fields are changed while holding icloglock */ - sv_t l_flush_wait ____cacheline_aligned_in_smp; + wait_queue_head_t l_flush_wait ____cacheline_aligned_in_smp; /* waiting for iclog flush */ int l_covered_state;/* state of "covering disk * log entries" */ @@ -600,6 +600,21 @@ xlog_cil_force(struct log *log) */ #define XLOG_UNMOUNT_REC_TYPE (-1U) +/* + * Wrapper function for waiting on a wait queue serialised against wakeups + * by a spinlock. This matches the semantics of all the wait queues used in the + * log code. + */ +static inline void xlog_wait(wait_queue_head_t *wq, spinlock_t *lock) +{ + DECLARE_WAITQUEUE(wait, current); + + add_wait_queue_exclusive(wq, &wait); + __set_current_state(TASK_UNINTERRUPTIBLE); + spin_unlock(lock); + schedule(); + remove_wait_queue(wq, &wait); +} #endif /* __KERNEL__ */ #endif /* __XFS_LOG_PRIV_H__ */ -- 1.7.2.3 From xin.zhong@intel.com Mon Dec 13 01:22:18 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_43, J_CHICKENPOX_62 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBD7MISN171611 for ; Mon, 13 Dec 2010 01:22:18 -0600 X-ASG-Debug-ID: 1292225047-753001610000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mga09.intel.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 184F4144029F for ; Sun, 12 Dec 2010 23:24:08 -0800 (PST) Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by cuda.sgi.com with ESMTP id SJP95Bl3sFiusX92 for ; Sun, 12 Dec 2010 23:24:08 -0800 (PST) Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP; 12 Dec 2010 23:24:07 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.59,335,1288594800"; d="scan'208";a="583120024" Received: from zyh-fedora.bj.intel.com (HELO localhost.localdomain) ([10.238.135.222]) by orsmga002.jf.intel.com with ESMTP; 12 Dec 2010 23:24:06 -0800 From: "Zhong, Xin" To: xfs@oss.sgi.com Cc: xin.zhong@intel.com X-ASG-Orig-Subj: [PATCH] xfstests: pwrite hang when writing from mmaped buffer of the same page Subject: [PATCH] xfstests: pwrite hang when writing from mmaped buffer of the same page Date: Mon, 13 Dec 2010 15:24:43 +0800 Message-Id: <1292225083-17713-1-git-send-email-xin.zhong@intel.com> X-Mailer: git-send-email 1.6.2.2 X-Barracuda-Connect: mga09.intel.com[134.134.136.24] X-Barracuda-Start-Time: 1292225049 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49284 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean The problem is found in meego testing: http://bugs.meego.com/show_bug.cgi?id=6672 Only btrfs has this problem so far. Other linux fs works well. Signed-off-by: Zhong, Xin --- 248 | 57 ++++++++++++++++++++++++++++++++++++++++ 248.out | 2 + group | 1 + src/Makefile | 2 +- src/pwrite_mmap_blocked.c | 63 +++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 124 insertions(+), 1 deletions(-) create mode 100644 248 create mode 100644 248.out create mode 100644 src/pwrite_mmap_blocked.c diff --git a/248 b/248 new file mode 100644 index 0000000..3e996d3 --- /dev/null +++ b/248 @@ -0,0 +1,57 @@ +#! /bin/bash +# FS QA Test No. 248 +# +# Test for pwrite hang problem when writing from mmaped buffer of the same page +# +#----------------------------------------------------------------------- +# Copyright (c) 2010 YOUR NAME HERE. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it would be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +#----------------------------------------------------------------------- +# +# creator +owner=xin.zhong@intel.com + +seq=`basename $0` +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + rm -f $tmp.* +} + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +# real QA test starts here + +# Modify as appropriate. +_supported_fs generic +_supported_os Linux + +TESTFILE=$TEST_DIR/test_file +TEST_PROG=$here/src/pwrite_mmap_blocked + +$TEST_PROG $TESTFILE + +# success, all done +status=0 +exit diff --git a/248.out b/248.out new file mode 100644 index 0000000..d02c1ac --- /dev/null +++ b/248.out @@ -0,0 +1,2 @@ +QA output created by 248 +pwrite 1 bytes from 2 to 3 diff --git a/group b/group index 0f94dd9..0b4f514 100644 --- a/group +++ b/group @@ -361,3 +361,4 @@ deprecated 245 auto quick dir 246 auto quick rw 247 auto quick rw +248 other diff --git a/src/Makefile b/src/Makefile index b827bd0..47d7334 100644 --- a/src/Makefile +++ b/src/Makefile @@ -17,7 +17,7 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \ locktest unwritten_mmap bulkstat_unlink_test t_stripealign \ bulkstat_unlink_test_modified t_dir_offset t_futimens t_immutable \ - stale_handle + stale_handle pwrite_mmap_blocked SUBDIRS = diff --git a/src/pwrite_mmap_blocked.c b/src/pwrite_mmap_blocked.c new file mode 100644 index 0000000..40d7f7b --- /dev/null +++ b/src/pwrite_mmap_blocked.c @@ -0,0 +1,63 @@ +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +char *progname; +loff_t size; +int fd; +char *filename="./test_file"; +void *mapped_mem; + + +int main(int argc, char *argv[]) +{ + int ret; + + progname = argv[0]; + size = 5; + fd = open(argv[1], O_RDWR|O_TRUNC|O_CREAT, 0666); + if (fd < 0) { + fprintf(stderr, "%s: Cannot open `%s': %s\n", + progname, filename, strerror(errno)); + exit(1); + } + + char *cc = "01234"; + if ((ret = pwrite(fd, (const char *)cc, + size, 0)) != size) { + fprintf(stderr, "%s: pwrite returned %d\n", + __FUNCTION__, ret); + perror("pwrite"); + exit(1); + } + + mapped_mem = mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); + if (mapped_mem == MAP_FAILED) { + perror("mmap"); + exit(1); + } + loff_t amount = 1; + loff_t from = 2; + loff_t to = 3; + printf("pwrite %Ld bytes from %Ld to %Ld\n", amount, from, to); + if ((ret = pwrite(fd, (char *)mapped_mem + from, amount, to)) != amount) { + printf("%s: pwrite returned %d, not %Ld\n", + __FUNCTION__, ret, amount); + if (errno == EFAULT) { + printf("pwrite: EFAULT\n"); + } else if (ret < 0) { + perror("pwrite"); + exit(1); + } + } + munmap(mapped_mem,0); + close(fd); + exit(0); +} -- 1.6.2.2 From branto@redhat.com Mon Dec 13 04:53:06 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBDAr6NO183464 for ; Mon, 13 Dec 2010 04:53:06 -0600 X-ASG-Debug-ID: 1292237697-0ae9027c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx3-phx2.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 002241440EDE for ; Mon, 13 Dec 2010 02:54:57 -0800 (PST) Received: from mx3-phx2.redhat.com (mx3-phx2.redhat.com [209.132.183.24]) by cuda.sgi.com with ESMTP id 6vXbj1buagX6SEpV for ; Mon, 13 Dec 2010 02:54:57 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from mail01.corp.redhat.com (zmail01.collab.prod.int.phx2.redhat.com [10.5.5.41]) by mx3-phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oBDAsogd004558; Mon, 13 Dec 2010 05:54:50 -0500 Date: Mon, 13 Dec 2010 05:54:50 -0500 (EST) From: Boris Ranto To: Christoph Hellwig Cc: xfs@oss.sgi.com Message-ID: <36980345.1112451292237690337.JavaMail.root@zmail01.collab.prod.int.phx2.redhat.com> In-Reply-To: <1924340607.1111921292237137384.JavaMail.root@zmail01.collab.prod.int.phx2.redhat.com> X-ASG-Orig-Subj: Re: xfstests: ignore absolute address in filename in test case 237 Subject: Re: xfstests: ignore absolute address in filename in test case 237 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Originating-IP: [10.5.5.71] X-Mailer: Zimbra 5.0.21_GA_3150.RHEL4_64 (ZimbraWebClient - FF3.0 (Linux)/5.0.21_GA_3150.RHEL4_64) X-Barracuda-Connect: mx3-phx2.redhat.com[209.132.183.24] X-Barracuda-Start-Time: 1292237698 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean ----- "Christoph Hellwig" wrote: > I don't mind the patch, but what version of getfacl would produce an > absolute filename? The behavior was found in acl-2.2.39-6.el5: * setfacl -m 'user:test:rw' file setfacl: /mnt/tests/kernel/filesystems/xfs/xfstests/file: Operation not permitted * setfacl --version setfacl 2.2.39 From BATV+8211b813bb02214bd551+2668+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 13 10:18:07 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBDGI42q219134 for ; Mon, 13 Dec 2010 10:18:07 -0600 X-ASG-Debug-ID: 1292257196-34e302440000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id ECA4D143FC59 for ; Mon, 13 Dec 2010 08:19:56 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id uY3KqALAYRz90O2J for ; Mon, 13 Dec 2010 08:19:56 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PSB7y-00069o-Ay; Mon, 13 Dec 2010 16:19:54 +0000 Date: Mon, 13 Dec 2010 11:19:54 -0500 From: Christoph Hellwig To: "Zhong, Xin" Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH] xfstests: pwrite hang when writing from mmaped buffer of the same page Subject: Re: [PATCH] xfstests: pwrite hang when writing from mmaped buffer of the same page Message-ID: <20101213161954.GA23509@infradead.org> References: <1292225083-17713-1-git-send-email-xin.zhong@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292225083-17713-1-git-send-email-xin.zhong@intel.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292257196 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 03:24:43PM +0800, Zhong, Xin wrote: > The problem is found in meego testing: > http://bugs.meego.com/show_bug.cgi?id=6672 > Only btrfs has this problem so far. Other linux fs works well. Thanks, the patch pretty good. A few think I'd like to improved, though: > +_cleanup() > +{ > + cd / > + rm -f $tmp.* > +} > + > +# get standard environment, filters and checks > +. ./common.rc > +. ./common.filter > + > +# real QA test starts here > + > +# Modify as appropriate. > +_supported_fs generic > +_supported_os Linux > + > +TESTFILE=$TEST_DIR/test_file > +TEST_PROG=$here/src/pwrite_mmap_blocked > + > +$TEST_PROG $TESTFILE Please remove the test file after the test completed. This is best done in the cleanup function, as it's called both for sucessfull and error exits. > +QA output created by 248 > +pwrite 1 bytes from 2 to 3 > diff --git a/group b/group > index 0f94dd9..0b4f514 100644 > --- a/group > +++ b/group > @@ -361,3 +361,4 @@ deprecated > 245 auto quick dir > 246 auto quick rw > 247 auto quick rw > +248 other The test should also be part of the quick and rw groups. > diff --git a/src/pwrite_mmap_blocked.c b/src/pwrite_mmap_blocked.c > new file mode 100644 > index 0000000..40d7f7b > --- /dev/null > +++ b/src/pwrite_mmap_blocked.c > @@ -0,0 +1,63 @@ > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include Please add a license header to the program, preferably GPLv2 or GPLv2 or later. > + > +char *progname; > +loff_t size; > +int fd; > +char *filename="./test_file"; The program is actually using the file name passed as the first argument, and you're only using this variable for the error message, please just remove it. From Ivan.Novick@emc.com Mon Dec 13 16:23:14 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBDMNEI2016164 for ; Mon, 13 Dec 2010 16:23:14 -0600 X-ASG-Debug-ID: 1292279105-0f8c038e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mexforward.lss.emc.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D66CC1CBFEDB for ; Mon, 13 Dec 2010 14:25:05 -0800 (PST) Received: from mexforward.lss.emc.com (mexforward.lss.emc.com [128.222.32.20]) by cuda.sgi.com with ESMTP id W8nYyGKEz6ASiEl5 for ; Mon, 13 Dec 2010 14:25:05 -0800 (PST) Received: from hop04-l1d11-si04.isus.emc.com (HOP04-L1D11-SI04.isus.emc.com [10.254.111.24]) by mexforward.lss.emc.com (Switch-3.4.3/Switch-3.4.3) with ESMTP id oBDMP4pG016177 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO) for ; Mon, 13 Dec 2010 17:25:04 -0500 Received: from mailhub.lss.emc.com (mailhub.lss.emc.com [10.254.221.145]) by hop04-l1d11-si04.isus.emc.com (RSA Interceptor) for ; Mon, 13 Dec 2010 17:25:01 -0500 Received: from mxhub19.corp.emc.com (mxhub19.corp.emc.com [10.254.93.48]) by mailhub.lss.emc.com (Switch-3.4.3/Switch-3.4.3) with ESMTP id oBDMOmnl028856 for ; Mon, 13 Dec 2010 17:24:48 -0500 Received: from mx06a.corp.emc.com ([169.254.1.172]) by mxhub19.corp.emc.com ([10.254.93.48]) with mapi; Mon, 13 Dec 2010 17:24:43 -0500 From: To: Date: Mon, 13 Dec 2010 17:24:46 -0500 X-ASG-Orig-Subj: inode64 mount option added after data exists Subject: inode64 mount option added after data exists Thread-Topic: inode64 mount option added after data exists Thread-Index: AcubFIzRra7BASioT/+SH5YMX9dqjA== Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Microsoft-MacOutlook/14.0.0.100825 acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-EMM-MHVC: 1 X-Barracuda-Connect: mexforward.lss.emc.com[128.222.32.20] X-Barracuda-Start-Time: 1292279105 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=NO_REAL_NAME X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49345 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 NO_REAL_NAME From: does not include a real name X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hi all, Quick question about the inode64 mount option. Is it safe to add this mount option to a file system that was already creat= ed and wrote lots of data without it. Will it still work as intended in this case (use 64 bit inodes)? Cheers, Ivan From xin.zhong@intel.com Mon Dec 13 20:58:34 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_43, J_CHICKENPOX_62 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBE2wXEt059301 for ; Mon, 13 Dec 2010 20:58:33 -0600 X-ASG-Debug-ID: 1292295625-2677013a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mga02.intel.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9311C1E6A86 for ; Mon, 13 Dec 2010 19:00:25 -0800 (PST) Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by cuda.sgi.com with ESMTP id v33E99Zgkn7WIKjK for ; Mon, 13 Dec 2010 19:00:25 -0800 (PST) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 13 Dec 2010 19:00:11 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.59,339,1288594800"; d="scan'208";a="686848572" Received: from zyh-fedora.bj.intel.com (HELO localhost.localdomain) ([10.238.135.222]) by orsmga001.jf.intel.com with ESMTP; 13 Dec 2010 19:00:10 -0800 From: "Zhong, Xin" To: xfs@oss.sgi.com Cc: xin.zhong@intel.com X-ASG-Orig-Subj: [PATCH v2] xfstests: pwrite hang when writing from mmaped buffer of the same page Subject: [PATCH v2] xfstests: pwrite hang when writing from mmaped buffer of the same page Date: Tue, 14 Dec 2010 11:00:52 +0800 Message-Id: <1292295652-9508-1-git-send-email-xin.zhong@intel.com> X-Mailer: git-send-email 1.6.2.2 X-Barracuda-Connect: mga02.intel.com[134.134.136.20] X-Barracuda-Start-Time: 1292295625 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49363 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean The problem is found in meego testing on btrfs: http://bugs.meego.com/show_bug.cgi?id=6672 Reviewed-by: Hellwig, Christoph Signed-off-by: Zhong, Xin --- 248 | 58 +++++++++++++++++++++++++++++++++ 248.out | 2 + group | 1 + src/Makefile | 2 +- src/pwrite_mmap_blocked.c | 78 +++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 140 insertions(+), 1 deletions(-) create mode 100755 248 create mode 100644 248.out create mode 100644 src/pwrite_mmap_blocked.c diff --git a/248 b/248 new file mode 100755 index 0000000..a4664d9 --- /dev/null +++ b/248 @@ -0,0 +1,58 @@ +#! /bin/bash +# FS QA Test No. 248 +# +# Test for pwrite hang problem when writing from mmaped buffer of the same page +# +#----------------------------------------------------------------------- +# Copyright (c) 2010 YOUR NAME HERE. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it would be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +#----------------------------------------------------------------------- +# +# creator +owner=xin.zhong@intel.com + +seq=`basename $0` +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + rm -f $tmp.* +} + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +# real QA test starts here + +# Modify as appropriate. +_supported_fs generic +_supported_os Linux + +TESTFILE=$TEST_DIR/test_file +TEST_PROG=$here/src/pwrite_mmap_blocked + +$TEST_PROG $TESTFILE +rm -f $TESTFILE + +# success, all done +status=0 +exit diff --git a/248.out b/248.out new file mode 100644 index 0000000..d02c1ac --- /dev/null +++ b/248.out @@ -0,0 +1,2 @@ +QA output created by 248 +pwrite 1 bytes from 2 to 3 diff --git a/group b/group index 0f94dd9..ddda26c 100644 --- a/group +++ b/group @@ -361,3 +361,4 @@ deprecated 245 auto quick dir 246 auto quick rw 247 auto quick rw +248 other quick rw diff --git a/src/Makefile b/src/Makefile index b827bd0..47d7334 100644 --- a/src/Makefile +++ b/src/Makefile @@ -17,7 +17,7 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \ locktest unwritten_mmap bulkstat_unlink_test t_stripealign \ bulkstat_unlink_test_modified t_dir_offset t_futimens t_immutable \ - stale_handle + stale_handle pwrite_mmap_blocked SUBDIRS = diff --git a/src/pwrite_mmap_blocked.c b/src/pwrite_mmap_blocked.c new file mode 100644 index 0000000..288a62f --- /dev/null +++ b/src/pwrite_mmap_blocked.c @@ -0,0 +1,78 @@ +/* Copyright (c) 2010 Intel Corporation + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; version 2 of the License + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +char *progname; +loff_t size; +int fd; +void *mapped_mem; + + +int main(int argc, char *argv[]) +{ + int ret; + + progname = argv[0]; + size = 5; + fd = open(argv[1], O_RDWR|O_TRUNC|O_CREAT, 0666); + if (fd < 0) { + fprintf(stderr, "%s: Cannot open `%s': %s\n", + progname, argv[1], strerror(errno)); + exit(1); + } + + char *cc = "01234"; + if ((ret = pwrite(fd, (const char *)cc, + size, 0)) != size) { + fprintf(stderr, "%s: pwrite returned %d\n", + __FUNCTION__, ret); + perror("pwrite"); + exit(1); + } + + mapped_mem = mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); + if (mapped_mem == MAP_FAILED) { + perror("mmap"); + exit(1); + } + loff_t amount = 1; + loff_t from = 2; + loff_t to = 3; + printf("pwrite %Ld bytes from %Ld to %Ld\n", amount, from, to); + if ((ret = pwrite(fd, (char *)mapped_mem + from, amount, to)) != amount) { + printf("%s: pwrite returned %d, not %Ld\n", + __FUNCTION__, ret, amount); + if (errno == EFAULT) { + printf("pwrite: EFAULT\n"); + } else if (ret < 0) { + perror("pwrite"); + exit(1); + } + } + munmap(mapped_mem,0); + close(fd); + exit(0); +} -- 1.6.2.2 From SRS0+nJ8m+17+fromorbit.com=david@internode.on.net Mon Dec 13 22:41:14 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_43, J_CHICKENPOX_62 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBE4fDE9068971 for ; Mon, 13 Dec 2010 22:41:14 -0600 X-ASG-Debug-ID: 1292301782-77a2019d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CAC18143C89D for ; Mon, 13 Dec 2010 20:43:02 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id Q4AgH2kcdYJCHROt for ; Mon, 13 Dec 2010 20:43:02 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 38387949-1927428 for multiple; Tue, 14 Dec 2010 15:13:01 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PSMj5-0004FK-Gk; Tue, 14 Dec 2010 15:42:59 +1100 Date: Tue, 14 Dec 2010 15:42:59 +1100 From: Dave Chinner To: "Zhong, Xin" Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH v2] xfstests: pwrite hang when writing from mmaped buffer of the same page Subject: Re: [PATCH v2] xfstests: pwrite hang when writing from mmaped buffer of the same page Message-ID: <20101214044259.GA16267@dastard> References: <1292295652-9508-1-git-send-email-xin.zhong@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292295652-9508-1-git-send-email-xin.zhong@intel.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292301784 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49370 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 14, 2010 at 11:00:52AM +0800, Zhong, Xin wrote: > The problem is found in meego testing on btrfs: > http://bugs.meego.com/show_bug.cgi?id=6672 > > Reviewed-by: Hellwig, Christoph > Signed-off-by: Zhong, Xin > --- > 248 | 58 +++++++++++++++++++++++++++++++++ > 248.out | 2 + > group | 1 + > src/Makefile | 2 +- > src/pwrite_mmap_blocked.c | 78 +++++++++++++++++++++++++++++++++++++++++++++ > 5 files changed, 140 insertions(+), 1 deletions(-) > create mode 100755 248 > create mode 100644 248.out > create mode 100644 src/pwrite_mmap_blocked.c > > diff --git a/248 b/248 > new file mode 100755 > index 0000000..a4664d9 > --- /dev/null > +++ b/248 > @@ -0,0 +1,58 @@ > +#! /bin/bash > +# FS QA Test No. 248 > +# > +# Test for pwrite hang problem when writing from mmaped buffer of the same page > +# > +#----------------------------------------------------------------------- > +# Copyright (c) 2010 YOUR NAME HERE. All Rights Reserved. ^^^^^^^^^^^^^^ Needs updating, I think. ;) While I'm here, a two minute review... .... > +_cleanup() > +{ > + cd / > + rm -f $tmp.* > +} > + > +# get standard environment, filters and checks > +. ./common.rc > +. ./common.filter > + > +# real QA test starts here > + > +# Modify as appropriate. > +_supported_fs generic > +_supported_os Linux > + > +TESTFILE=$TEST_DIR/test_file > +TEST_PROG=$here/src/pwrite_mmap_blocked > + > +$TEST_PROG $TESTFILE > +rm -f $TESTFILE This rm should be in the _cleanup() function so that it is removed even when the test is aborted. ..... > diff --git a/group b/group > index 0f94dd9..ddda26c 100644 > --- a/group > +++ b/group > @@ -361,3 +361,4 @@ deprecated > 245 auto quick dir > 246 auto quick rw > 247 auto quick rw > +248 other quick rw Why not the auto group? > +char *progname; > +loff_t size; > +int fd; > +void *mapped_mem; None of these need to be global. > + > + > +int main(int argc, char *argv[]) > +{ > + int ret; > + > + progname = argv[0]; > + size = 5; > + fd = open(argv[1], O_RDWR|O_TRUNC|O_CREAT, 0666); > + if (fd < 0) { > + fprintf(stderr, "%s: Cannot open `%s': %s\n", > + progname, argv[1], strerror(errno)); > + exit(1); > + } > + > + char *cc = "01234"; Don't mix declarations in the the code. Better would be: int ret; char *cc = "01234"; progname = argv[0]; size = strlen(cc); .... > + if ((ret = pwrite(fd, (const char *)cc, > + size, 0)) != size) { ret = pwrite(fd, cc, size, 0); if (ret != size) { > + fprintf(stderr, "%s: pwrite returned %d\n", > + __FUNCTION__, ret); > + perror("pwrite"); > + exit(1); > + } No need for both fprintf and perror calls. > + > + mapped_mem = mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); > + if (mapped_mem == MAP_FAILED) { > + perror("mmap"); > + exit(1); > + } > + loff_t amount = 1; > + loff_t from = 2; > + loff_t to = 3; > + printf("pwrite %Ld bytes from %Ld to %Ld\n", amount, from, to); > + if ((ret = pwrite(fd, (char *)mapped_mem + from, amount, to)) != amount) { ret = pwrite(fd, (char *)mapped_mem + from, amount, to)); if (ret != amount) { > + printf("%s: pwrite returned %d, not %Ld\n", > + __FUNCTION__, ret, amount); > + if (errno == EFAULT) { > + printf("pwrite: EFAULT\n"); > + } else if (ret < 0) { > + perror("pwrite"); > + exit(1); > + } A single call to perror() will be sufficient here... > + } > + munmap(mapped_mem,0); > + close(fd); > + exit(0); > +} Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+nJ8m+17+fromorbit.com=david@internode.on.net Mon Dec 13 22:42:08 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBE4g82k069194 for ; Mon, 13 Dec 2010 22:42:08 -0600 X-ASG-Debug-ID: 1292301837-0a3302bc0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4BB3D1CC0DF6 for ; Mon, 13 Dec 2010 20:43:58 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id qdrixxL0E26J8DBR for ; Mon, 13 Dec 2010 20:43:58 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 38388022-1927428 for multiple; Tue, 14 Dec 2010 15:13:57 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PSMjz-0004FT-VM; Tue, 14 Dec 2010 15:43:56 +1100 Date: Tue, 14 Dec 2010 15:43:55 +1100 From: Dave Chinner To: Ivan.Novick@emc.com Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: inode64 mount option added after data exists Subject: Re: inode64 mount option added after data exists Message-ID: <20101214044355.GB16267@dastard> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292301840 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0006 1.0000 -2.0169 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49369 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 05:24:46PM -0500, Ivan.Novick@emc.com wrote: > Hi all, > > Quick question about the inode64 mount option. > > Is it safe to add this mount option to a file system that was > already created and wrote lots of data without it. Yes. > Will it still work as intended in this case (use 64 bit inodes)? Yes, for newly created inodes and data. Cheers, Dave. -- Dave Chinner david@fromorbit.com From xin.zhong@intel.com Mon Dec 13 23:17:46 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_43, J_CHICKENPOX_62 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBE5Hkhm073295 for ; Mon, 13 Dec 2010 23:17:46 -0600 X-ASG-Debug-ID: 1292303977-275b00b10000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mga14.intel.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1974C1E7FBE for ; Mon, 13 Dec 2010 21:19:37 -0800 (PST) Received: from mga14.intel.com (mga14.intel.com [143.182.124.37]) by cuda.sgi.com with ESMTP id NBDS0b5sPRgWncTV for ; Mon, 13 Dec 2010 21:19:37 -0800 (PST) Received: from azsmga001.ch.intel.com ([10.2.17.19]) by azsmga102.ch.intel.com with ESMTP; 13 Dec 2010 21:19:36 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.59,340,1288594800"; d="scan'208";a="361304205" Received: from zyh-fedora.bj.intel.com (HELO localhost.localdomain) ([10.238.135.222]) by azsmga001.ch.intel.com with ESMTP; 13 Dec 2010 21:19:35 -0800 From: "Zhong, Xin" To: xfs@oss.sgi.com Cc: xin.zhong@intel.com X-ASG-Orig-Subj: [PATCH v3] xfstests: pwrite hang when writing from mmaped buffer of the same page Subject: [PATCH v3] xfstests: pwrite hang when writing from mmaped buffer of the same page Date: Tue, 14 Dec 2010 13:20:18 +0800 Message-Id: <1292304018-10827-1-git-send-email-xin.zhong@intel.com> X-Mailer: git-send-email 1.6.2.2 X-Barracuda-Connect: mga14.intel.com[143.182.124.37] X-Barracuda-Start-Time: 1292303978 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49371 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean The problem is found in meego testing on btrfs: http://bugs.meego.com/show_bug.cgi?id=6672 Reviewed-by: Hellwig, Christoph and Chinner, Dave Signed-off-by: Zhong, Xin --- 248 | 57 ++++++++++++++++++++++++++++++++++++ 248.out | 2 + group | 1 + src/Makefile | 2 +- src/pwrite_mmap_blocked.c | 71 +++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 132 insertions(+), 1 deletions(-) create mode 100644 248 create mode 100644 248.out create mode 100644 src/pwrite_mmap_blocked.c diff --git a/248 b/248 new file mode 100644 index 0000000..ea4313f --- /dev/null +++ b/248 @@ -0,0 +1,57 @@ +#! /bin/bash +# FS QA Test No. 248 +# +# Test for pwrite hang problem when writing from mmaped buffer of the same page +# +#----------------------------------------------------------------------- +# Copyright (c) 2010 YOUR NAME HERE. All Rights Reserved. +# +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License as +# published by the Free Software Foundation. +# +# This program is distributed in the hope that it would be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write the Free Software Foundation, +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA +#----------------------------------------------------------------------- +# +# creator +owner=xin.zhong@intel.com + +seq=`basename $0` +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + rm -f $tmp.* $TESTFILE +} + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +# real QA test starts here + +# Modify as appropriate. +_supported_fs generic +_supported_os Linux + +TESTFILE=$TEST_DIR/test_file +TEST_PROG=$here/src/pwrite_mmap_blocked + +$TEST_PROG $TESTFILE + +# success, all done +status=0 +exit diff --git a/248.out b/248.out new file mode 100644 index 0000000..d02c1ac --- /dev/null +++ b/248.out @@ -0,0 +1,2 @@ +QA output created by 248 +pwrite 1 bytes from 2 to 3 diff --git a/group b/group index 0f94dd9..a40c98f 100644 --- a/group +++ b/group @@ -361,3 +361,4 @@ deprecated 245 auto quick dir 246 auto quick rw 247 auto quick rw +248 auto quick rw diff --git a/src/Makefile b/src/Makefile index b827bd0..47d7334 100644 --- a/src/Makefile +++ b/src/Makefile @@ -17,7 +17,7 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \ locktest unwritten_mmap bulkstat_unlink_test t_stripealign \ bulkstat_unlink_test_modified t_dir_offset t_futimens t_immutable \ - stale_handle + stale_handle pwrite_mmap_blocked SUBDIRS = diff --git a/src/pwrite_mmap_blocked.c b/src/pwrite_mmap_blocked.c new file mode 100644 index 0000000..6e7d4e7 --- /dev/null +++ b/src/pwrite_mmap_blocked.c @@ -0,0 +1,71 @@ +/* Copyright (c) 2010 Intel Corporation + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; version 2 of the License + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + + + +int main(int argc, char *argv[]) +{ + int ret; + char *cc = "01234"; + char *progname; + loff_t size; + int fd; + void *mapped_mem; + + progname = argv[0]; + size = 5; + fd = open(argv[1], O_RDWR|O_TRUNC|O_CREAT, 0666); + if (fd < 0) { + fprintf(stderr, "%s: Cannot open `%s': %s\n", + progname, argv[1], strerror(errno)); + exit(1); + } + + if ((ret = pwrite(fd, (const char *)cc, + size, 0)) != size) { + perror("pwrite"); + exit(1); + } + + mapped_mem = mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); + if (mapped_mem == MAP_FAILED) { + perror("mmap"); + exit(1); + } + loff_t amount = 1; + loff_t from = 2; + loff_t to = 3; + printf("pwrite %Ld bytes from %Ld to %Ld\n", amount, from, to); + ret = pwrite(fd, (char *)mapped_mem + from, amount, to); + if (ret != amount) { + perror("pwrite"); + exit(1); + } + munmap(mapped_mem,0); + close(fd); + exit(0); +} -- 1.6.2.2 From michael.monnerie@is.it-management.at Tue Dec 14 01:18:13 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBE7ICEv086345 for ; Tue, 14 Dec 2010 01:18:12 -0600 X-ASG-Debug-ID: 1292311201-6a13013e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mailsrv14.zmi.at (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 30438144882E for ; Mon, 13 Dec 2010 23:20:02 -0800 (PST) Received: from mailsrv14.zmi.at (mailsrv1.zmi.at [212.69.164.54]) by cuda.sgi.com with ESMTP id d634rHbVtjEIFqqM for ; Mon, 13 Dec 2010 23:20:02 -0800 (PST) Received: from mailsrv.i.zmi.at (h081217106033.dyn.cm.kabsi.at [81.217.106.33]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client CN "mailsrv2.i.zmi.at", Issuer "power4u.zmi.at" (not verified)) by mailsrv14.zmi.at (Postfix) with ESMTPSA id EA4EA144; Tue, 14 Dec 2010 08:19:59 +0100 (CET) Received: from saturn.localnet (saturn.i.zmi.at [10.72.27.2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mailsrv.i.zmi.at (Postfix) with ESMTPSA id 47E0C401C2E; Tue, 14 Dec 2010 08:19:59 +0100 (CET) From: Michael Monnerie Organization: it-management http://it-management.at To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: inode64 mount option added after data exists Subject: Re: inode64 mount option added after data exists Date: Tue, 14 Dec 2010 08:19:57 +0100 User-Agent: KMail/1.13.5 (Linux/2.6.34.7-0.5-desktop; KDE/4.4.4; x86_64; ; ) Cc: Dave Chinner , Ivan.Novick@emc.com References: <20101214044355.GB16267@dastard> In-Reply-To: <20101214044355.GB16267@dastard> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart3245705.9MkWnFbgBt"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <201012140819.58723@zmi.at> X-Barracuda-Connect: mailsrv1.zmi.at[212.69.164.54] X-Barracuda-Start-Time: 1292311203 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49380 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --nextPart3245705.9MkWnFbgBt Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable On Dienstag, 14. Dezember 2010 Dave Chinner wrote: > > Will it still work as intended in this case (use 64 bit inodes)? >=20 > Yes, for newly created inodes and data. When you have the existing files/dirs, would it help to take an existing=20 dir "$path/old", create a new dir "$path/new", and then do cd $path/old find . -type f -exec "ln {} ../new/" \; rm * mv ../new/* . to get the inodes created in the new space? This could be necessary in=20 case the first 1TB is full, and no more inodes can be created. I'm just=20 not sure if that would be enough. =2D-=20 mit freundlichen Gr=FCssen, Michael Monnerie, Ing. BSc it-management Internet Services: Prot=E9ger http://proteger.at [gesprochen: Prot-e-schee] Tel: +43 660 / 415 6531 // ****** Radiointerview zum Thema Spam ****** // http://www.it-podcast.at/archiv.html#podcast-100716 //=20 // Haus zu verkaufen: http://zmi.at/langegg/ --nextPart3245705.9MkWnFbgBt Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.15 (GNU/Linux) iEYEABECAAYFAk0HGp4ACgkQzhSR9xwSCbShuQCg8i4/s4sdSnbGbJZczZXOnvPO 7YYAoM31N6wvXMpkULJSW4sM3bUKQdfa =i7uX -----END PGP SIGNATURE----- --nextPart3245705.9MkWnFbgBt-- From anderegghvsz@yahoo.es Tue Dec 14 03:58:02 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: **** X-Spam-Status: No, score=4.3 required=5.0 tests=BAYES_99,FREEMAIL_FROM, MIME_8BIT_HEADER,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBE9w2WL103137 for ; 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charset="gb2312" Content-Transfer-Encoding: base64 X-Barracuda-Connect: nm19-vm0.bullet.mail.ukl.yahoo.com[217.146.183.113] X-Barracuda-Start-Time: 1292320793 X-Barracuda-Bayes: INNOCENT GLOBAL 0.3435 1.0000 -0.1761 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: 0.55 X-Barracuda-Spam-Status: No, SCORE=0.55 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED, MIME_BASE64_TEXT, PR0N_SUBJECT, UNPARSEABLE_RELAY X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49391 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 UNPARSEABLE_RELAY Informational: message has unparseable relay lines -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.52 MIME_BASE64_TEXT RAW: Message text disguised using base64 encoding 0.20 PR0N_SUBJECT Subject has letters around special characters (pr0n) X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean xPq6w6Oh16jStbmp06bUrbOn0czLv8Xk1sa498Dgw+LLsM/j0cwuDQoNCiDW0LuqoaLcvcjYu8ah osvV0cyhorTz0KHQ3MOooaK7xrrXwqWhotK7vsXSu8H5oaK2rLPmz8Sy3bXIo6ENCg0KIMGqz7VR UaO6NjQyNzE0MzYyICAgus7J+jEzNjkyMjI3NzYyIA0KDQogsb7JzNDQz+PRzLa8yse+q7fCz7XB 0C6w/Newus3V5sa3sfDO3sG90fmjqNPQt8DOscLro6kgv9q40LS/1f0uOTUltrzKx9Xm0czLvy4N Cg0KINX9ueazp7zSvNO5pNbG1/cuob6+q7fCob8gs6e1xNKqx/O63NHPuPEu0czStsirsr/M2Mri vNO5pNPr1sbX99Xm1f2077W9wcu437Hq17y1xNKqx/Mho6jF+sG/vNu48cHt0umjqb270tfB47Wj t+fP1aOhDQoNCiDKx9fUs+ks1dC0/SzLzcDxLMX6t6IswePK2yy5q8u+LL7GteosINPpwNazocv5 tcjK19GhLCANCg0KILzbuPG4/LrPwO0sv9rOtrj8tL/V/SEgvPu79bi2v+4sx+u3xdDEubrC8iEg s7m118jDxPrO3rrzucvWrtPHIQ0KDQog0tShsLPP0MUuzvHKtS6439CnLrmy066hsc6q19rWvNPr xPqzpMbaus/X9ywgtPLIxcfrxOPBwr3iDQoNCiAgICAgICAgeWFob28uZXMoMy05KXlhaG9vLmVz KDMtOSk= From branto@redhat.com Tue Dec 14 08:51:53 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBEEprjV131851 for ; Tue, 14 Dec 2010 08:51:53 -0600 X-ASG-Debug-ID: 1292338424-4d0201cc0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E96A51E9572 for ; Tue, 14 Dec 2010 06:53:45 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id iFKNoMc2gLc2ftqd for ; Tue, 14 Dec 2010 06:53:45 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx01.intmail.prod.int.phx2.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oBEErdJR021196 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 14 Dec 2010 09:53:39 -0500 Received: from [10.34.26.208] (dhcp-26-208.brq.redhat.com [10.34.26.208]) by int-mx01.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oBEErb0c016012; Tue, 14 Dec 2010 09:53:38 -0500 X-ASG-Orig-Subj: Re: xfstests: fix 108 through config mechanism Subject: Re: xfstests: fix 108 through config mechanism From: Boris Ranto To: Christoph Hellwig Cc: xfs@oss.sgi.com In-Reply-To: <20101210143717.GB1415@infradead.org> References: <1291905612.3196.49.camel@dhcp-31-190.brq.redhat.com> <20101210143717.GB1415@infradead.org> Content-Type: text/plain; charset="UTF-8" Date: Tue, 14 Dec 2010 15:53:37 +0100 Message-ID: <1292338417.3296.57.camel@dhcp-31-190.brq.redhat.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.67 on 10.5.11.11 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1292338425 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, 2010-12-10 at 09:37 -0500, Christoph Hellwig wrote: > I don't rally like the per-test option. What about adding a > _filter_xfs_quota helper that uses sed to output a canonical > number of whitespaces? > I didn't like it much either but I found it quite easy to implement with quite high probability of future usage. I found the following modification sufficient although I'm not sure I put the _filter_spaces in right place (I'd say it's quite universal so it could find a usage in other cases): diff -urpN a/xfstests/108 b/xfstests/108 --- a/xfstests/108 2010-12-09 11:34:37.733245986 +0100 +++ b/xfstests/108 2010-12-14 14:50:16.813494309 +0100 @@ -72,9 +72,9 @@ test_accounting() for file in $SCRATCH_MNT/{buffer,direct,mmap}; do $here/src/lstat64 $file | head -3 | _filter_scratch done - xfs_quota -c "quota -hnb -$type $id" $QARGS | _filter_scratch - xfs_quota -c "quota -hni -$type $id" $QARGS | _filter_scratch - xfs_quota -c "quota -hnr -$type $id" $QARGS | _filter_scratch + xfs_quota -c "quota -hnb -$type $id" $QARGS | _filter_scratch | _filter_spaces + xfs_quota -c "quota -hni -$type $id" $QARGS | _filter_scratch | _filter_spaces + xfs_quota -c "quota -hnr -$type $id" $QARGS | _filter_scratch | _filter_spaces } export MOUNT_OPTIONS="-opquota" diff -urpN a/xfstests/108.out b/xfstests/108.out --- a/xfstests/108.out 2010-12-09 11:24:48.973251551 +0100 +++ b/xfstests/108.out 2010-12-14 15:01:33.640484268 +0100 @@ -32,11 +32,11 @@ projid = 3 Size: 16777216 Filetype: Regular File Mode: (0600/-rw-------) Uid: (1) Gid: (2) Disk quotas for User #1 (1) -Filesystem Blocks Quota Limit Warn/Time Mounted on -SCRATCH_DEV 48M 0 0 00 [------] SCRATCH_MNT +Filesystem Blocks Quota Limit Warn/Time Mounted on +SCRATCH_DEV 48M 0 0 00 [------] SCRATCH_MNT Disk quotas for User #1 (1) -Filesystem Files Quota Limit Warn/Time Mounted on -SCRATCH_DEV 3 0 0 00 [------] SCRATCH_MNT +Filesystem Files Quota Limit Warn/Time Mounted on +SCRATCH_DEV 3 0 0 00 [------] SCRATCH_MNT ### test group accounting @@ -64,11 +64,11 @@ projid = 3 Size: 16777216 Filetype: Regular File Mode: (0600/-rw-------) Uid: (1) Gid: (2) Disk quotas for Group #2 (2) -Filesystem Blocks Quota Limit Warn/Time Mounted on -SCRATCH_DEV 48M 0 0 00 [------] SCRATCH_MNT +Filesystem Blocks Quota Limit Warn/Time Mounted on +SCRATCH_DEV 48M 0 0 00 [------] SCRATCH_MNT Disk quotas for Group #2 (2) -Filesystem Files Quota Limit Warn/Time Mounted on -SCRATCH_DEV 3 0 0 00 [------] SCRATCH_MNT +Filesystem Files Quota Limit Warn/Time Mounted on +SCRATCH_DEV 3 0 0 00 [------] SCRATCH_MNT ### create files, setting up ownership (type=p) File: "SCRATCH_MNT/buffer" @@ -94,8 +94,8 @@ projid = 3 Size: 16777216 Filetype: Regular File Mode: (0600/-rw-------) Uid: (1) Gid: (2) Disk quotas for Project #3 (3) -Filesystem Blocks Quota Limit Warn/Time Mounted on -SCRATCH_DEV 48M 0 0 00 [------] SCRATCH_MNT +Filesystem Blocks Quota Limit Warn/Time Mounted on +SCRATCH_DEV 48M 0 0 00 [------] SCRATCH_MNT Disk quotas for Project #3 (3) -Filesystem Files Quota Limit Warn/Time Mounted on -SCRATCH_DEV 3 0 0 00 [------] SCRATCH_MNT +Filesystem Files Quota Limit Warn/Time Mounted on +SCRATCH_DEV 3 0 0 00 [------] SCRATCH_MNT diff -urpN a/xfstests/common.filter b/xfstests/common.filter --- a/xfstests/common.filter 2010-12-09 11:24:44.315240233 +0100 +++ b/xfstests/common.filter 2010-12-14 14:45:53.566228712 +0100 @@ -224,5 +224,10 @@ _filter_scratch() sed -e "s,$SCRATCH_DEV,SCRATCH_DEV,g" -e "s,$SCRATCH_MNT,SCRATCH_MNT,g" } +_filter_spaces() +{ + sed -e 's/ [ ]*/ /g' +} + # make sure this script returns success /bin/true Signed-off-by: Boris Ranto From BATV+a647025752f7ecdeadf6+2669+infradead.org+hch@bombadil.srs.infradead.org Tue Dec 14 13:15:27 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBEJFN88144415 for ; Tue, 14 Dec 2010 13:15:27 -0600 X-ASG-Debug-ID: 1292354236-4965015b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 855B51EAFC9 for ; Tue, 14 Dec 2010 11:17:16 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id xSF7CWWF6EolsNs9 for ; Tue, 14 Dec 2010 11:17:16 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PSaN7-0006tu-PQ; Tue, 14 Dec 2010 19:17:13 +0000 Date: Tue, 14 Dec 2010 14:17:13 -0500 From: Christoph Hellwig To: Boris Ranto Cc: Christoph Hellwig , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfstests: fix 108 through config mechanism Subject: Re: xfstests: fix 108 through config mechanism Message-ID: <20101214191713.GA26513@infradead.org> References: <1291905612.3196.49.camel@dhcp-31-190.brq.redhat.com> <20101210143717.GB1415@infradead.org> <1292338417.3296.57.camel@dhcp-31-190.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292338417.3296.57.camel@dhcp-31-190.brq.redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292354236 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 14, 2010 at 03:53:37PM +0100, Boris Ranto wrote: > I didn't like it much either but I found it quite easy to implement with quite high probability of future usage. > > I found the following modification sufficient although I'm not sure I put the _filter_spaces in right place (I'd say it's quite universal so it could find a usage in other cases): This patch looks good to me. Can you resent it in the correct format: - a descriptive subject - mail body containing a short explanation, than the signed-off-by line, then the actual patch. From BATV+a647025752f7ecdeadf6+2669+infradead.org+hch@bombadil.srs.infradead.org Tue Dec 14 13:16:53 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBEJGrFA144527 for ; Tue, 14 Dec 2010 13:16:53 -0600 X-ASG-Debug-ID: 1292354326-0bbd03d80000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B86EF1EAFF0 for ; Tue, 14 Dec 2010 11:18:46 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id niaLNjU2BhOdrG12 for ; Tue, 14 Dec 2010 11:18:46 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PSaOc-0006v4-83; Tue, 14 Dec 2010 19:18:46 +0000 Date: Tue, 14 Dec 2010 14:18:46 -0500 From: Christoph Hellwig To: Boris Ranto Cc: Christoph Hellwig , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfstests: ignore absolute address in filename in test case 237 Subject: Re: xfstests: ignore absolute address in filename in test case 237 Message-ID: <20101214191846.GB26513@infradead.org> References: <1924340607.1111921292237137384.JavaMail.root@zmail01.collab.prod.int.phx2.redhat.com> <36980345.1112451292237690337.JavaMail.root@zmail01.collab.prod.int.phx2.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <36980345.1112451292237690337.JavaMail.root@zmail01.collab.prod.int.phx2.redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292354326 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 05:54:50AM -0500, Boris Ranto wrote: > ----- "Christoph Hellwig" wrote: > > > I don't mind the patch, but what version of getfacl would produce an > > absolute filename? > > The behavior was found in acl-2.2.39-6.el5: > > * setfacl -m 'user:test:rw' file > setfacl: /mnt/tests/kernel/filesystems/xfs/xfstests/file: Operation not permitted > * setfacl --version > setfacl 2.2.39 Ok. I'll apply the patch. From paulmck@paulmck-ThinkPad-W500linux.vnet.ibm.com Tue Dec 14 14:21:17 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBEKLGVo147357 for ; Tue, 14 Dec 2010 14:21:16 -0600 X-ASG-Debug-ID: 1292358188-095803bf0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from e1.ny.us.ibm.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C40E4144EF8E for ; Tue, 14 Dec 2010 12:23:08 -0800 (PST) Received: from e1.ny.us.ibm.com (e1.ny.us.ibm.com [32.97.182.141]) by cuda.sgi.com with ESMTP id DlaVZqnloncf2kMC for ; Tue, 14 Dec 2010 12:23:08 -0800 (PST) Received: from d01dlp02.pok.ibm.com (d01dlp02.pok.ibm.com [9.56.224.85]) by e1.ny.us.ibm.com (8.14.4/8.13.1) with ESMTP id oBEKEPjT029168 for ; Tue, 14 Dec 2010 15:14:51 -0500 Received: from d01relay07.pok.ibm.com (d01relay07.pok.ibm.com [9.56.227.147]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id 298F04DE8047 for ; Tue, 14 Dec 2010 15:21:02 -0500 (EST) Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay07.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id oBEKN6YC2138202 for ; Tue, 14 Dec 2010 15:23:06 -0500 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id oBEKN5eU032025 for ; Tue, 14 Dec 2010 15:23:06 -0500 Received: from paulmck-ThinkPad-W500 (paulmck-ThinkPad-W500.beaverton.ibm.com [9.47.24.62]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id oBEKN2g9031715; Tue, 14 Dec 2010 15:23:02 -0500 Received: by paulmck-ThinkPad-W500 (Postfix, from userid 1000) id 04AFA13F812; Tue, 14 Dec 2010 12:23:02 -0800 (PST) Date: Tue, 14 Dec 2010 12:23:01 -0800 From: "Paul E. McKenney" To: Dave Chinner Cc: xfs@oss.sgi.com, eric.dumazet@gmail.com X-ASG-Orig-Subj: Re: [PATCH 1/3] xfs: rcu free inodes Subject: Re: [PATCH 1/3] xfs: rcu free inodes Message-ID: <20101214202301.GG2161@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <1292203957-15819-1-git-send-email-david@fromorbit.com> <1292203957-15819-2-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292203957-15819-2-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Content-Scanned: Fidelis XPS MAILER X-Barracuda-Connect: e1.ny.us.ibm.com[32.97.182.141] X-Barracuda-Start-Time: 1292358188 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.92 X-Barracuda-Spam-Status: No, SCORE=-0.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE_7582B, MARKETING_SUBJECT X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49432 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.60 MARKETING_SUBJECT Subject contains popular marketing words 0.50 BSF_RULE_7582B Custom Rule 7582B X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 12:32:35PM +1100, Dave Chinner wrote: > From: Dave Chinner > > Introduce RCU freeing of XFS inodes so that we can convert lookup > traversals to use rcu_read_lock() protection. This patch only > introduces the RCU freeing to minimise the potential conflicts with > mainline if this is merged into mainline via a VFS patchset. It > abuses the i_dentry list for the RCU callback structure because the > VFS patches make this a union so it is safe to use like this and > simplifies and merge issues. > > This patch uses basic RCU freeing rather than SLAB_DESTROY_BY_RCU. > The later lookup patches need the same "found free inode" protection > regardless of the RCU freeing method used, so once again the RCU > freeing method can be dealt with apprpriately at merge time without > affecting any other code. There are only two call sites that free into xfs_inode_zone. One of them is initialization, before readers have access to the data strcuture, and the other is covered by this patch. So looks good to me! Reviewed-by: Paul E. McKenney > Signed-off-by: Dave Chinner > --- > fs/xfs/xfs_iget.c | 14 +++++++++++++- > 1 files changed, 13 insertions(+), 1 deletions(-) > > diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c > index cdb1c25..9fae475 100644 > --- a/fs/xfs/xfs_iget.c > +++ b/fs/xfs/xfs_iget.c > @@ -105,6 +105,18 @@ xfs_inode_alloc( > } > > void > +__xfs_inode_free( > + struct rcu_head *head) > +{ > + struct inode *inode = container_of((void *)head, > + struct inode, i_dentry); > + struct xfs_inode *ip = XFS_I(inode); > + > + INIT_LIST_HEAD(&inode->i_dentry); > + kmem_zone_free(xfs_inode_zone, ip); > +} > + > +void > xfs_inode_free( > struct xfs_inode *ip) > { > @@ -147,7 +159,7 @@ xfs_inode_free( > ASSERT(!spin_is_locked(&ip->i_flags_lock)); > ASSERT(completion_done(&ip->i_flush)); > > - kmem_zone_free(xfs_inode_zone, ip); > + call_rcu((struct rcu_head *)&VFS_I(ip)->i_dentry, __xfs_inode_free); > } > > /* > -- > 1.7.2.3 > From paulmck@paulmck-ThinkPad-W500linux.vnet.ibm.com Tue Dec 14 15:16:18 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBELGHuH149506 for ; Tue, 14 Dec 2010 15:16:18 -0600 X-ASG-Debug-ID: 1292361488-0831002d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from e1.ny.us.ibm.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A6A8A1450665 for ; Tue, 14 Dec 2010 13:18:08 -0800 (PST) Received: from e1.ny.us.ibm.com (e1.ny.us.ibm.com [32.97.182.141]) by cuda.sgi.com with ESMTP id CrGDUzRNGfO66oYl for ; Tue, 14 Dec 2010 13:18:08 -0800 (PST) Received: from d01dlp01.pok.ibm.com (d01dlp01.pok.ibm.com [9.56.224.56]) by e1.ny.us.ibm.com (8.14.4/8.13.1) with ESMTP id oBEL9dq6010291 for ; Tue, 14 Dec 2010 16:09:52 -0500 Received: from d01relay07.pok.ibm.com (d01relay07.pok.ibm.com [9.56.227.147]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id 1874672805E for ; Tue, 14 Dec 2010 16:18:08 -0500 (EST) Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay07.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id oBELI6Wb1495236 for ; Tue, 14 Dec 2010 16:18:06 -0500 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id oBELI5j5006212 for ; Tue, 14 Dec 2010 16:18:06 -0500 Received: from paulmck-ThinkPad-W500 (paulmck-ThinkPad-W500.beaverton.ibm.com [9.47.24.62]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id oBELI10W005857; Tue, 14 Dec 2010 16:18:01 -0500 Received: by paulmck-ThinkPad-W500 (Postfix, from userid 1000) id 5792413F812; Tue, 14 Dec 2010 13:18:01 -0800 (PST) Date: Tue, 14 Dec 2010 13:18:01 -0800 From: "Paul E. McKenney" To: Dave Chinner Cc: xfs@oss.sgi.com, eric.dumazet@gmail.com X-ASG-Orig-Subj: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Subject: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Message-ID: <20101214211801.GH2161@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <1292203957-15819-1-git-send-email-david@fromorbit.com> <1292203957-15819-3-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <1292203957-15819-3-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Content-Scanned: Fidelis XPS MAILER X-Barracuda-Connect: e1.ny.us.ibm.com[32.97.182.141] X-Barracuda-Start-Time: 1292361489 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49436 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 12:32:36PM +1100, Dave Chinner wrote: > From: Dave Chinner > > With delayed logging greatly increasing the sustained parallelism of inode > operations, the inode cache locking is showing significant read vs write > contention when inode reclaim runs at the same time as lookups. There is > also a lot more write lock acquistions than there are read locks (4:1 ratio) > so the read locking is not really buying us much in the way of parallelism. > > To avoid the read vs write contention, change the cache to use RCU locking on > the read side. To avoid needing to RCU free every single inode, use the built > in slab RCU freeing mechanism. This requires us to be able to detect lookups of > freed inodes, so enÑ•ure that ever freed inode has an inode number of zero and > the XFS_IRECLAIM flag set. We already check the XFS_IRECLAIM flag in cache hit > lookup path, but also add a check for a zero inode number as well. > > We canthen convert all the read locking lockups to use RCU read side locking > and hence remove all read side locking. OK, so the xfs_inode uses straight RCU, and there fore cannot be freed and immediately reallocated, while the inode itself uses SLAB_DESTROY_BY_RCU, which does allow the inode to be freed and immediately reallocated, correct? Some questions and comments below. Thanx, Paul > Signed-off-by: Dave Chinner > Reviewed-by: Alex Elder > --- > fs/xfs/linux-2.6/xfs_sync.c | 27 ++++++++++++++++----- > fs/xfs/xfs_iget.c | 50 +++++++++++++++++++++++++++++++---------- > fs/xfs/xfs_inode.c | 52 +++++++++++++++++++++++++++++++++---------- > 3 files changed, 98 insertions(+), 31 deletions(-) > > diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c > index afb0d7c..5ee02d7 100644 > --- a/fs/xfs/linux-2.6/xfs_sync.c > +++ b/fs/xfs/linux-2.6/xfs_sync.c > @@ -53,14 +53,20 @@ xfs_inode_ag_walk_grab( > { > struct inode *inode = VFS_I(ip); > > + /* check for stale RCU freed inode */ > + spin_lock(&ip->i_flags_lock); > + if (!ip->i_ino) > + goto out_unlock_noent; > + > + /* avoid new or reclaimable inodes. Leave for reclaim code to flush */ > + if (__xfs_iflags_test(ip, XFS_INEW | XFS_IRECLAIMABLE | XFS_IRECLAIM)) > + goto out_unlock_noent; > + spin_unlock(&ip->i_flags_lock); > + OK, this works because the xfs_inode cannot be freed and reallocated (which the RCU change should enforce). It is not clear to me that the above would work if using the SLAB_DESTROY_BY_RCU approach, at least not unless some higher-level checks can reliably catch an inode changing identity due to quick free and reallocation. Also, all calls to xfs_inode_ag_walk_grab() must be in RCU read-side critical sections... I suggest a debug check for rcu_read_lock_held() to catch any call paths that might have slipped through. At first glance, it appears that RCU is replacing some of ->pag_ici_lock, but I could easily be mistaken. > /* nothing to sync during shutdown */ > if (XFS_FORCED_SHUTDOWN(ip->i_mount)) > return EFSCORRUPTED; > > - /* avoid new or reclaimable inodes. Leave for reclaim code to flush */ > - if (xfs_iflags_test(ip, XFS_INEW | XFS_IRECLAIMABLE | XFS_IRECLAIM)) > - return ENOENT; > - > /* If we can't grab the inode, it must on it's way to reclaim. */ > if (!igrab(inode)) > return ENOENT; > @@ -72,6 +78,10 @@ xfs_inode_ag_walk_grab( > > /* inode is valid */ > return 0; > + > +out_unlock_noent: > + spin_unlock(&ip->i_flags_lock); > + return ENOENT; > } > > STATIC int > @@ -98,12 +108,12 @@ restart: > int error = 0; > int i; > > - read_lock(&pag->pag_ici_lock); > + rcu_read_lock(); > nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, > (void **)batch, first_index, > XFS_LOOKUP_BATCH); > if (!nr_found) { > - read_unlock(&pag->pag_ici_lock); > + rcu_read_unlock(); > break; > } > > @@ -129,7 +139,7 @@ restart: > } > > /* unlock now we've grabbed the inodes. */ > - read_unlock(&pag->pag_ici_lock); > + rcu_read_unlock(); > > for (i = 0; i < nr_found; i++) { > if (!batch[i]) > @@ -639,6 +649,9 @@ xfs_reclaim_inode_grab( > struct xfs_inode *ip, > int flags) > { > + /* check for stale RCU freed inode */ > + if (!ip->i_ino) > + return 1; Does this mean that we need to be under rcu_read_lock() here? If not, how do we keep the inode from really being freed out from under us? (Again, if we do need to be under rcu_read_lock(), I highly recommend a debug check for rcu_read_lock_held().) > /* > * do some unlocked checks first to avoid unnecceary lock traffic. > diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c > index 9fae475..1e3b035 100644 > --- a/fs/xfs/xfs_iget.c > +++ b/fs/xfs/xfs_iget.c > @@ -80,6 +80,7 @@ xfs_inode_alloc( > ASSERT(atomic_read(&ip->i_pincount) == 0); > ASSERT(!spin_is_locked(&ip->i_flags_lock)); > ASSERT(completion_done(&ip->i_flush)); > + ASSERT(ip->i_ino == 0); > > mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); > lockdep_set_class_and_name(&ip->i_iolock.mr_lock, > @@ -98,9 +99,6 @@ xfs_inode_alloc( > ip->i_size = 0; > ip->i_new_size = 0; > > - /* prevent anyone from using this yet */ > - VFS_I(ip)->i_state = I_NEW; > - > return ip; > } > > @@ -159,6 +157,16 @@ xfs_inode_free( > ASSERT(!spin_is_locked(&ip->i_flags_lock)); > ASSERT(completion_done(&ip->i_flush)); > > + /* > + * Because we use RCU freeing we need to ensure the inode always > + * appears to be reclaimed with an invalid inode number when in the > + * free state. The ip->i_flags_lock provides the barrier against lookup > + * races. > + */ > + spin_lock(&ip->i_flags_lock); > + ip->i_flags = XFS_IRECLAIM; > + ip->i_ino = 0; > + spin_unlock(&ip->i_flags_lock); OK, good! > call_rcu((struct rcu_head *)&VFS_I(ip)->i_dentry, __xfs_inode_free); > } > > @@ -169,14 +177,32 @@ static int > xfs_iget_cache_hit( > struct xfs_perag *pag, > struct xfs_inode *ip, > + xfs_ino_t ino, > int flags, > - int lock_flags) __releases(pag->pag_ici_lock) > + int lock_flags) __releases(RCU) > { > struct inode *inode = VFS_I(ip); > struct xfs_mount *mp = ip->i_mount; > int error; > > + /* > + * check for re-use of an inode within an RCU grace period due to the > + * radix tree nodes not being updated yet. We monitor for this by > + * setting the inode number to zero before freeing the inode structure. > + * If the inode has been reallocated and set up, then the inode number > + * will not match, so check for that, too. > + */ > spin_lock(&ip->i_flags_lock); > + if (ip->i_ino != ino) { > + trace_xfs_iget_skip(ip); > + XFS_STATS_INC(xs_ig_frecycle); > + spin_unlock(&ip->i_flags_lock); > + rcu_read_unlock(); > + /* Expire the grace period so we don't trip over it again. */ > + synchronize_rcu(); Hmmm... Interesting. Wouldn't the fact that we acquired the same lock that was held after removing the inode guarantee that an immediate retry would manage not to find this same inode again? If this is not the case, then readers finding it again will not be protected by the RCU grace period, right? In short, I don't understand why the synchronize_rcu() is needed. If it is somehow helping, that sounds to me like it is covering up a real bug that should be fixed separately. > + return EAGAIN; > + } > + > > /* > * If we are racing with another cache hit that is currently > @@ -219,7 +245,7 @@ xfs_iget_cache_hit( > ip->i_flags |= XFS_IRECLAIM; > > spin_unlock(&ip->i_flags_lock); > - read_unlock(&pag->pag_ici_lock); > + rcu_read_unlock(); > > error = -inode_init_always(mp->m_super, inode); > if (error) { > @@ -227,7 +253,7 @@ xfs_iget_cache_hit( > * Re-initializing the inode failed, and we are in deep > * trouble. Try to re-add it to the reclaim list. > */ > - read_lock(&pag->pag_ici_lock); > + rcu_read_lock(); > spin_lock(&ip->i_flags_lock); > > ip->i_flags &= ~XFS_INEW; > @@ -261,7 +287,7 @@ xfs_iget_cache_hit( > > /* We've got a live one. */ > spin_unlock(&ip->i_flags_lock); > - read_unlock(&pag->pag_ici_lock); > + rcu_read_unlock(); > trace_xfs_iget_hit(ip); > } > > @@ -275,7 +301,7 @@ xfs_iget_cache_hit( > > out_error: > spin_unlock(&ip->i_flags_lock); > - read_unlock(&pag->pag_ici_lock); > + rcu_read_unlock(); > return error; > } > > @@ -397,7 +423,7 @@ xfs_iget( > xfs_agino_t agino; > > /* reject inode numbers outside existing AGs */ > - if (XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) > + if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) For the above check to be safe, don't we need to already be in an RCU read-side critical section? Or is something else protecting us? > return EINVAL; > > /* get the perag structure and ensure that it's inode capable */ > @@ -406,15 +432,15 @@ xfs_iget( > > again: > error = 0; > - read_lock(&pag->pag_ici_lock); > + rcu_read_lock(); > ip = radix_tree_lookup(&pag->pag_ici_root, agino); > > if (ip) { > - error = xfs_iget_cache_hit(pag, ip, flags, lock_flags); > + error = xfs_iget_cache_hit(pag, ip, ino, flags, lock_flags); > if (error) > goto out_error_or_again; > } else { > - read_unlock(&pag->pag_ici_lock); > + rcu_read_unlock(); > XFS_STATS_INC(xs_ig_missed); > > error = xfs_iget_cache_miss(mp, pag, tp, ino, &ip, > diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c > index 108c7a0..43ffd90 100644 > --- a/fs/xfs/xfs_inode.c > +++ b/fs/xfs/xfs_inode.c > @@ -2000,17 +2000,33 @@ xfs_ifree_cluster( > */ > for (i = 0; i < ninodes; i++) { > retry: > - read_lock(&pag->pag_ici_lock); > + rcu_read_lock(); > ip = radix_tree_lookup(&pag->pag_ici_root, > XFS_INO_TO_AGINO(mp, (inum + i))); > > - /* Inode not in memory or stale, nothing to do */ > - if (!ip || xfs_iflags_test(ip, XFS_ISTALE)) { > - read_unlock(&pag->pag_ici_lock); > + /* Inode not in memory, nothing to do */ > + if (!ip) { > + rcu_read_unlock(); > continue; > } > > /* > + * because this is an RCU protected lookup, we could > + * find a recently freed or even reallocated inode And here the inode might be immediately freed and then reallocated. (In contrast, this cannot happen to the xfs_inode.) > + * during the lookup. We need to check under the > + * i_flags_lock for a valid inode here. Skip it if it > + * is not valid, the wrong inode or stale. > + */ > + spin_lock(&ip->i_flags_lock); > + if (ip->i_ino != inum + i || > + __xfs_iflags_test(ip, XFS_ISTALE)) { > + spin_unlock(&ip->i_flags_lock); > + rcu_read_unlock(); > + continue; > + } > + spin_unlock(&ip->i_flags_lock); > + > + /* > * Don't try to lock/unlock the current inode, but we > * _cannot_ skip the other inodes that we did not find > * in the list attached to the buffer and are not > @@ -2019,11 +2035,11 @@ retry: > */ > if (ip != free_ip && > !xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { > - read_unlock(&pag->pag_ici_lock); > + rcu_read_unlock(); > delay(1); > goto retry; > } > - read_unlock(&pag->pag_ici_lock); > + rcu_read_unlock(); > > xfs_iflock(ip); > xfs_iflags_set(ip, XFS_ISTALE); > @@ -2629,7 +2645,7 @@ xfs_iflush_cluster( > > mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1); > first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask; > - read_lock(&pag->pag_ici_lock); > + rcu_read_lock(); > /* really need a gang lookup range call here */ > nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)ilist, > first_index, inodes_per_cluster); > @@ -2640,9 +2656,21 @@ xfs_iflush_cluster( > iq = ilist[i]; > if (iq == ip) > continue; > - /* if the inode lies outside this cluster, we're done. */ > - if ((XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) > - break; > + > + /* > + * because this is an RCU protected lookup, we could find a > + * recently freed or even reallocated inode during the lookup. > + * We need to check under the i_flags_lock for a valid inode > + * here. Skip it if it is not valid or the wrong inode. > + */ > + spin_lock(&ip->i_flags_lock); > + if (!ip->i_ino || > + (XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) { > + spin_unlock(&ip->i_flags_lock); > + continue; > + } > + spin_unlock(&ip->i_flags_lock); > + > /* > * Do an un-protected check to see if the inode is dirty and > * is a candidate for flushing. These checks will be repeated > @@ -2692,7 +2720,7 @@ xfs_iflush_cluster( > } > > out_free: > - read_unlock(&pag->pag_ici_lock); > + rcu_read_unlock(); > kmem_free(ilist); > out_put: > xfs_perag_put(pag); > @@ -2704,7 +2732,7 @@ cluster_corrupt_out: > * Corruption detected in the clustering loop. Invalidate the > * inode buffer and shut down the filesystem. > */ > - read_unlock(&pag->pag_ici_lock); > + rcu_read_unlock(); > /* > * Clean up the buffer. If it was B_DELWRI, just release it -- > * brelse can handle it with no problems. If not, shut down the > -- > 1.7.2.3 > From paulmck@paulmck-ThinkPad-W500linux.vnet.ibm.com Tue Dec 14 15:17:16 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBELHGSN149561 for ; Tue, 14 Dec 2010 15:17:16 -0600 X-ASG-Debug-ID: 1292361548-735400100000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from e6.ny.us.ibm.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 411BC1CC66DD for ; Tue, 14 Dec 2010 13:19:08 -0800 (PST) Received: from e6.ny.us.ibm.com (e6.ny.us.ibm.com [32.97.182.146]) by cuda.sgi.com with ESMTP id xNW8pMPSrCJGcbjD for ; Tue, 14 Dec 2010 13:19:08 -0800 (PST) Received: from d01dlp02.pok.ibm.com (d01dlp02.pok.ibm.com [9.56.224.85]) by e6.ny.us.ibm.com (8.14.4/8.13.1) with ESMTP id oBEL3uam023960 for ; Tue, 14 Dec 2010 16:04:08 -0500 Received: from d01relay01.pok.ibm.com (d01relay01.pok.ibm.com [9.56.227.233]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id A1E094DE805A for ; Tue, 14 Dec 2010 16:17:02 -0500 (EST) Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay01.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id oBELJ72p402810 for ; Tue, 14 Dec 2010 16:19:07 -0500 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id oBELJ5X6010291 for ; Tue, 14 Dec 2010 16:19:07 -0500 Received: from paulmck-ThinkPad-W500 (paulmck-ThinkPad-W500.beaverton.ibm.com [9.47.24.62]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id oBELJ4h3010248; Tue, 14 Dec 2010 16:19:04 -0500 Received: by paulmck-ThinkPad-W500 (Postfix, from userid 1000) id 1926513F812; Tue, 14 Dec 2010 13:19:04 -0800 (PST) Date: Tue, 14 Dec 2010 13:19:04 -0800 From: "Paul E. McKenney" To: Dave Chinner Cc: xfs@oss.sgi.com, eric.dumazet@gmail.com X-ASG-Orig-Subj: Re: [PATCH 3/3] xfs: convert pag_ici_lock to a spin lock Subject: Re: [PATCH 3/3] xfs: convert pag_ici_lock to a spin lock Message-ID: <20101214211904.GI2161@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <1292203957-15819-1-git-send-email-david@fromorbit.com> <1292203957-15819-4-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292203957-15819-4-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Content-Scanned: Fidelis XPS MAILER X-Barracuda-Connect: e6.ny.us.ibm.com[32.97.182.146] X-Barracuda-Start-Time: 1292361549 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49435 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 12:32:37PM +1100, Dave Chinner wrote: > From: Dave Chinner > > now that we are using RCU protection for the inode cache lookups, > the lock is only needed on the modification side. Hence it is not > necessary for the lock to be a rwlock as there are no read side > holders anymore. Convert it to a spin lock to reflect it's exclusive > nature. Looks good! Reviewed-by: Paul E. McKenney > Signed-off-by: Dave Chinner > Reviewed-by: Alex Elder > Reviewed-by: Christoph Hellwig > --- > fs/xfs/linux-2.6/xfs_sync.c | 14 +++++++------- > fs/xfs/xfs_ag.h | 2 +- > fs/xfs/xfs_iget.c | 10 +++++----- > fs/xfs/xfs_mount.c | 2 +- > 4 files changed, 14 insertions(+), 14 deletions(-) > > diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c > index 5ee02d7..d3b3b4f 100644 > --- a/fs/xfs/linux-2.6/xfs_sync.c > +++ b/fs/xfs/linux-2.6/xfs_sync.c > @@ -602,12 +602,12 @@ xfs_inode_set_reclaim_tag( > struct xfs_perag *pag; > > pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); > - write_lock(&pag->pag_ici_lock); > + spin_lock(&pag->pag_ici_lock); > spin_lock(&ip->i_flags_lock); > __xfs_inode_set_reclaim_tag(pag, ip); > __xfs_iflags_set(ip, XFS_IRECLAIMABLE); > spin_unlock(&ip->i_flags_lock); > - write_unlock(&pag->pag_ici_lock); > + spin_unlock(&pag->pag_ici_lock); > xfs_perag_put(pag); > } > > @@ -808,12 +808,12 @@ reclaim: > * added to the tree assert that it's been there before to catch > * problems with the inode life time early on. > */ > - write_lock(&pag->pag_ici_lock); > + spin_lock(&pag->pag_ici_lock); > if (!radix_tree_delete(&pag->pag_ici_root, > XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino))) > ASSERT(0); > __xfs_inode_clear_reclaim(pag, ip); > - write_unlock(&pag->pag_ici_lock); > + spin_unlock(&pag->pag_ici_lock); > > /* > * Here we do an (almost) spurious inode lock in order to coordinate > @@ -877,14 +877,14 @@ restart: > struct xfs_inode *batch[XFS_LOOKUP_BATCH]; > int i; > > - write_lock(&pag->pag_ici_lock); > + spin_lock(&pag->pag_ici_lock); > nr_found = radix_tree_gang_lookup_tag( > &pag->pag_ici_root, > (void **)batch, first_index, > XFS_LOOKUP_BATCH, > XFS_ICI_RECLAIM_TAG); > if (!nr_found) { > - write_unlock(&pag->pag_ici_lock); > + spin_unlock(&pag->pag_ici_lock); > break; > } > > @@ -911,7 +911,7 @@ restart: > } > > /* unlock now we've grabbed the inodes. */ > - write_unlock(&pag->pag_ici_lock); > + spin_unlock(&pag->pag_ici_lock); > > for (i = 0; i < nr_found; i++) { > if (!batch[i]) > diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h > index 63c7a1a..58632cc 100644 > --- a/fs/xfs/xfs_ag.h > +++ b/fs/xfs/xfs_ag.h > @@ -227,7 +227,7 @@ typedef struct xfs_perag { > > atomic_t pagf_fstrms; /* # of filestreams active in this AG */ > > - rwlock_t pag_ici_lock; /* incore inode lock */ > + spinlock_t pag_ici_lock; /* incore inode cache lock */ > struct radix_tree_root pag_ici_root; /* incore inode cache root */ > int pag_ici_reclaimable; /* reclaimable inodes */ > struct mutex pag_ici_reclaim_lock; /* serialisation point */ > diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c > index 1e3b035..ec440da 100644 > --- a/fs/xfs/xfs_iget.c > +++ b/fs/xfs/xfs_iget.c > @@ -263,7 +263,7 @@ xfs_iget_cache_hit( > goto out_error; > } > > - write_lock(&pag->pag_ici_lock); > + spin_lock(&pag->pag_ici_lock); > spin_lock(&ip->i_flags_lock); > ip->i_flags &= ~(XFS_IRECLAIMABLE | XFS_IRECLAIM); > ip->i_flags |= XFS_INEW; > @@ -276,7 +276,7 @@ xfs_iget_cache_hit( > &xfs_iolock_active, "xfs_iolock_active"); > > spin_unlock(&ip->i_flags_lock); > - write_unlock(&pag->pag_ici_lock); > + spin_unlock(&pag->pag_ici_lock); > } else { > /* If the VFS inode is being torn down, pause and try again. */ > if (!igrab(inode)) { > @@ -354,7 +354,7 @@ xfs_iget_cache_miss( > BUG(); > } > > - write_lock(&pag->pag_ici_lock); > + spin_lock(&pag->pag_ici_lock); > > /* insert the new inode */ > error = radix_tree_insert(&pag->pag_ici_root, agino, ip); > @@ -369,14 +369,14 @@ xfs_iget_cache_miss( > ip->i_udquot = ip->i_gdquot = NULL; > xfs_iflags_set(ip, XFS_INEW); > > - write_unlock(&pag->pag_ici_lock); > + spin_unlock(&pag->pag_ici_lock); > radix_tree_preload_end(); > > *ipp = ip; > return 0; > > out_preload_end: > - write_unlock(&pag->pag_ici_lock); > + spin_unlock(&pag->pag_ici_lock); > radix_tree_preload_end(); > if (lock_flags) > xfs_iunlock(ip, lock_flags); > diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c > index fe27338..52186c0 100644 > --- a/fs/xfs/xfs_mount.c > +++ b/fs/xfs/xfs_mount.c > @@ -598,7 +598,7 @@ xfs_initialize_perag( > goto out_unwind; > pag->pag_agno = index; > pag->pag_mount = mp; > - rwlock_init(&pag->pag_ici_lock); > + spin_lock_init(&pag->pag_ici_lock); > mutex_init(&pag->pag_ici_reclaim_lock); > INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC); > spin_lock_init(&pag->pag_buf_lock); > -- > 1.7.2.3 > From SRS0+nJ8m+17+fromorbit.com=david@internode.on.net Tue Dec 14 16:59:05 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBEMx4T1152843 for ; Tue, 14 Dec 2010 16:59:05 -0600 X-ASG-Debug-ID: 1292367654-3f8901d40000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 735831450E7D for ; Tue, 14 Dec 2010 15:00:54 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id MBkEiicwiM7oDnHc for ; Tue, 14 Dec 2010 15:00:54 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49852864-1927428 for multiple; Wed, 15 Dec 2010 09:30:49 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PSdrT-0005qC-G0; Wed, 15 Dec 2010 10:00:47 +1100 Date: Wed, 15 Dec 2010 10:00:47 +1100 From: Dave Chinner To: "Paul E. McKenney" Cc: xfs@oss.sgi.com, eric.dumazet@gmail.com X-ASG-Orig-Subj: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Subject: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Message-ID: <20101214230047.GC16267@dastard> References: <1292203957-15819-1-git-send-email-david@fromorbit.com> <1292203957-15819-3-git-send-email-david@fromorbit.com> <20101214211801.GH2161@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20101214211801.GH2161@linux.vnet.ibm.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292367656 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49442 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 14, 2010 at 01:18:01PM -0800, Paul E. McKenney wrote: > On Mon, Dec 13, 2010 at 12:32:36PM +1100, Dave Chinner wrote: > > From: Dave Chinner > > > > With delayed logging greatly increasing the sustained parallelism of inode > > operations, the inode cache locking is showing significant read vs write > > contention when inode reclaim runs at the same time as lookups. There is > > also a lot more write lock acquistions than there are read locks (4:1 ratio) > > so the read locking is not really buying us much in the way of parallelism. > > > > To avoid the read vs write contention, change the cache to use RCU locking on > > the read side. To avoid needing to RCU free every single inode, use the built > > in slab RCU freeing mechanism. This requires us to be able to detect lookups of > > freed inodes, so enÑ•ure that ever freed inode has an inode number of zero and > > the XFS_IRECLAIM flag set. We already check the XFS_IRECLAIM flag in cache hit > > lookup path, but also add a check for a zero inode number as well. > > > > We canthen convert all the read locking lockups to use RCU read side locking > > and hence remove all read side locking. > > OK, so the xfs_inode uses straight RCU, and there fore cannot be freed and > immediately reallocated, while the inode itself uses SLAB_DESTROY_BY_RCU, > which does allow the inode to be freed and immediately reallocated, > correct? No, the struct inode is embedded in the struct xfs_inode, so they have the same lifecycle. i.e. we don't separately allocate and free the struct inode. So it is all using straight RCU. > Some questions and comments below. > > Thanx, Paul > > > Signed-off-by: Dave Chinner > > Reviewed-by: Alex Elder > > --- > > fs/xfs/linux-2.6/xfs_sync.c | 27 ++++++++++++++++----- > > fs/xfs/xfs_iget.c | 50 +++++++++++++++++++++++++++++++---------- > > fs/xfs/xfs_inode.c | 52 +++++++++++++++++++++++++++++++++---------- > > 3 files changed, 98 insertions(+), 31 deletions(-) > > > > diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c > > index afb0d7c..5ee02d7 100644 > > --- a/fs/xfs/linux-2.6/xfs_sync.c > > +++ b/fs/xfs/linux-2.6/xfs_sync.c > > @@ -53,14 +53,20 @@ xfs_inode_ag_walk_grab( > > { > > struct inode *inode = VFS_I(ip); > > > > + /* check for stale RCU freed inode */ > > + spin_lock(&ip->i_flags_lock); > > + if (!ip->i_ino) > > + goto out_unlock_noent; > > + > > + /* avoid new or reclaimable inodes. Leave for reclaim code to flush */ > > + if (__xfs_iflags_test(ip, XFS_INEW | XFS_IRECLAIMABLE | XFS_IRECLAIM)) > > + goto out_unlock_noent; > > + spin_unlock(&ip->i_flags_lock); > > + > > OK, this works because the xfs_inode cannot be freed and reallocated (which > the RCU change should enforce). It is not clear to me that the above > would work if using the SLAB_DESTROY_BY_RCU approach, at least not unless > some higher-level checks can reliably catch an inode changing identity > due to quick free and reallocation. In this case, I don't believe it matters if the inode has changed identity - we are walking for writeback, so if we get a reallocated inode we'll write it back if it is dirty. If it has not been reallocated or still being initialised, the !ip->i_ino and XFS_INEW|XFS_IRECLAIM checks are sufficient to avoid using the inode. I probably should add a comment to this effect, yes? > Also, all calls to xfs_inode_ag_walk_grab() must be in RCU read-side > critical sections... I suggest a debug check for rcu_read_lock_held() to > catch any call paths that might have slipped through. Yes, good idea. > At first glance, > it appears that RCU is replacing some of ->pag_ici_lock, but I could > easily be mistaken. Correct, it is replacing the read side of the ->pag_ici_lock. > > @@ -639,6 +649,9 @@ xfs_reclaim_inode_grab( > > struct xfs_inode *ip, > > int flags) > > { > > + /* check for stale RCU freed inode */ > > + if (!ip->i_ino) > > + return 1; > > Does this mean that we need to be under rcu_read_lock() here? If not, > how do we keep the inode from really being freed out from under us? Hmmm, I think I've mismerged a patch somewhere along the line. In this patch the reclaim tree walk is under the ->pag_ici_lock(), when in fact it should be under the rcu_read_lock(). Good catch, Paul. As it is, being under the ->pag_ici_lock means that the tree is consistent and we won't be seeing RCU freed inodes in the walk. Hence the code is functioning correctly, just not as wasss intended. > (Again, if we do need to be under rcu_read_lock(), I highly recommend > a debug check for rcu_read_lock_held().) Yup, which would have caught the merge screwup... .... > > > > + /* > > + * check for re-use of an inode within an RCU grace period due to the > > + * radix tree nodes not being updated yet. We monitor for this by > > + * setting the inode number to zero before freeing the inode structure. > > + * If the inode has been reallocated and set up, then the inode number > > + * will not match, so check for that, too. > > + */ > > spin_lock(&ip->i_flags_lock); > > + if (ip->i_ino != ino) { > > + trace_xfs_iget_skip(ip); > > + XFS_STATS_INC(xs_ig_frecycle); > > + spin_unlock(&ip->i_flags_lock); > > + rcu_read_unlock(); > > + /* Expire the grace period so we don't trip over it again. */ > > + synchronize_rcu(); > > Hmmm... Interesting. Wouldn't the fact that we acquired the same lock > that was held after removing the inode guarantee that an immediate retry > would manage not to find this same inode again? That is what I'm not sure of. I was more worried about resolving the contents of the radix tree nodes, not so much the inode itself. If a new traversal will resolve the tree correctly (which is what you are implying), then synchronize_rcu() is not needed.... > If this is not the case, then readers finding it again will not be > protected by the RCU grace period, right? > > In short, I don't understand why the synchronize_rcu() is needed. > If it is somehow helping, that sounds to me like it is covering up > a real bug that should be fixed separately. It isn't covering up a bug, it was more tryingt o be consistent with the rest of the xfs_inode lookup failures - we back off and try again later. If that is unnecessary resolve the RCU lookup race, then it can be dropped. > > @@ -397,7 +423,7 @@ xfs_iget( > > xfs_agino_t agino; > > > > /* reject inode numbers outside existing AGs */ > > - if (XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) > > + if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) > > For the above check to be safe, don't we need to already be in an > RCU read-side critical section? Or is something else protecting us? "ino" is the inode number used as the lookup key to find the struct xfs_inode. This is ensuring we don't try to look up an inode number of zero given it's new special meaning as a freed inode. Hence it can be safely validated outside the RCU read-side critical sectioni as it is a constant. Thanks for the review, Paul. I'll fix up the issues you've pointed out and retest. Cheers, Dave. -- Dave Chinner david@fromorbit.com From paulmck@paulmck-ThinkPad-W500linux.vnet.ibm.com Tue Dec 14 19:03:48 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF13m2L158708 for ; Tue, 14 Dec 2010 19:03:48 -0600 X-ASG-Debug-ID: 1292375139-79d600760000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from e7.ny.us.ibm.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CB0981ECCAF for ; Tue, 14 Dec 2010 17:05:40 -0800 (PST) Received: from e7.ny.us.ibm.com (e7.ny.us.ibm.com [32.97.182.137]) by cuda.sgi.com with ESMTP id Uc0EpL4Ix3di9roa for ; Tue, 14 Dec 2010 17:05:40 -0800 (PST) Received: from d01dlp01.pok.ibm.com (d01dlp01.pok.ibm.com [9.56.224.56]) by e7.ny.us.ibm.com (8.14.4/8.13.1) with ESMTP id oBF0ljh6020083 for ; Tue, 14 Dec 2010 19:47:52 -0500 Received: from d01relay03.pok.ibm.com (d01relay03.pok.ibm.com [9.56.227.235]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id E864B728080 for ; Tue, 14 Dec 2010 20:05:38 -0500 (EST) Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay03.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id oBF15cni298558 for ; Tue, 14 Dec 2010 20:05:38 -0500 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id oBF15cFt027846 for ; Tue, 14 Dec 2010 20:05:38 -0500 Received: from paulmck-ThinkPad-W500 (paulmck-ThinkPad-W500.beaverton.ibm.com [9.47.24.62]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id oBF15aXW027748; Tue, 14 Dec 2010 20:05:37 -0500 Received: by paulmck-ThinkPad-W500 (Postfix, from userid 1000) id 2951013F812; Tue, 14 Dec 2010 17:05:36 -0800 (PST) Date: Tue, 14 Dec 2010 17:05:36 -0800 From: "Paul E. McKenney" To: Dave Chinner Cc: xfs@oss.sgi.com, eric.dumazet@gmail.com X-ASG-Orig-Subj: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Subject: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Message-ID: <20101215010536.GT2161@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <1292203957-15819-1-git-send-email-david@fromorbit.com> <1292203957-15819-3-git-send-email-david@fromorbit.com> <20101214211801.GH2161@linux.vnet.ibm.com> <20101214230047.GC16267@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20101214230047.GC16267@dastard> User-Agent: Mutt/1.5.20 (2009-06-14) X-Content-Scanned: Fidelis XPS MAILER X-Barracuda-Connect: e7.ny.us.ibm.com[32.97.182.137] X-Barracuda-Start-Time: 1292375140 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.23 X-Barracuda-Spam-Status: No, SCORE=-0.23 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M, MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49451 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 0.50 BSF_RULE7568M Custom Rule 7568M 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 15, 2010 at 10:00:47AM +1100, Dave Chinner wrote: > On Tue, Dec 14, 2010 at 01:18:01PM -0800, Paul E. McKenney wrote: > > On Mon, Dec 13, 2010 at 12:32:36PM +1100, Dave Chinner wrote: > > > From: Dave Chinner > > > > > > With delayed logging greatly increasing the sustained parallelism of inode > > > operations, the inode cache locking is showing significant read vs write > > > contention when inode reclaim runs at the same time as lookups. There is > > > also a lot more write lock acquistions than there are read locks (4:1 ratio) > > > so the read locking is not really buying us much in the way of parallelism. > > > > > > To avoid the read vs write contention, change the cache to use RCU locking on > > > the read side. To avoid needing to RCU free every single inode, use the built > > > in slab RCU freeing mechanism. This requires us to be able to detect lookups of > > > freed inodes, so enÑ•ure that ever freed inode has an inode number of zero and > > > the XFS_IRECLAIM flag set. We already check the XFS_IRECLAIM flag in cache hit > > > lookup path, but also add a check for a zero inode number as well. > > > > > > We canthen convert all the read locking lockups to use RCU read side locking > > > and hence remove all read side locking. > > > > OK, so the xfs_inode uses straight RCU, and there fore cannot be freed and > > immediately reallocated, while the inode itself uses SLAB_DESTROY_BY_RCU, > > which does allow the inode to be freed and immediately reallocated, > > correct? > > No, the struct inode is embedded in the struct xfs_inode, so they > have the same lifecycle. i.e. we don't separately allocate and free > the struct inode. So it is all using straight RCU. > > > Some questions and comments below. > > > > Thanx, Paul > > > > > Signed-off-by: Dave Chinner > > > Reviewed-by: Alex Elder > > > --- > > > fs/xfs/linux-2.6/xfs_sync.c | 27 ++++++++++++++++----- > > > fs/xfs/xfs_iget.c | 50 +++++++++++++++++++++++++++++++---------- > > > fs/xfs/xfs_inode.c | 52 +++++++++++++++++++++++++++++++++---------- > > > 3 files changed, 98 insertions(+), 31 deletions(-) > > > > > > diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c > > > index afb0d7c..5ee02d7 100644 > > > --- a/fs/xfs/linux-2.6/xfs_sync.c > > > +++ b/fs/xfs/linux-2.6/xfs_sync.c > > > @@ -53,14 +53,20 @@ xfs_inode_ag_walk_grab( > > > { > > > struct inode *inode = VFS_I(ip); > > > > > > + /* check for stale RCU freed inode */ > > > + spin_lock(&ip->i_flags_lock); > > > + if (!ip->i_ino) > > > + goto out_unlock_noent; > > > + > > > + /* avoid new or reclaimable inodes. Leave for reclaim code to flush */ > > > + if (__xfs_iflags_test(ip, XFS_INEW | XFS_IRECLAIMABLE | XFS_IRECLAIM)) > > > + goto out_unlock_noent; > > > + spin_unlock(&ip->i_flags_lock); > > > + > > > > OK, this works because the xfs_inode cannot be freed and reallocated (which > > the RCU change should enforce). It is not clear to me that the above > > would work if using the SLAB_DESTROY_BY_RCU approach, at least not unless > > some higher-level checks can reliably catch an inode changing identity > > due to quick free and reallocation. > > In this case, I don't believe it matters if the inode has changed > identity - we are walking for writeback, so if we get a reallocated > inode we'll write it back if it is dirty. If it has not been > reallocated or still being initialised, the !ip->i_ino and > XFS_INEW|XFS_IRECLAIM checks are sufficient to avoid using the inode. > > I probably should add a comment to this effect, yes? One vote in favor from me. ;-) > > Also, all calls to xfs_inode_ag_walk_grab() must be in RCU read-side > > critical sections... I suggest a debug check for rcu_read_lock_held() to > > catch any call paths that might have slipped through. > > Yes, good idea. > > > At first glance, > > it appears that RCU is replacing some of ->pag_ici_lock, but I could > > easily be mistaken. > > Correct, it is replacing the read side of the ->pag_ici_lock. OK, good! > > > @@ -639,6 +649,9 @@ xfs_reclaim_inode_grab( > > > struct xfs_inode *ip, > > > int flags) > > > { > > > + /* check for stale RCU freed inode */ > > > + if (!ip->i_ino) > > > + return 1; > > > > Does this mean that we need to be under rcu_read_lock() here? If not, > > how do we keep the inode from really being freed out from under us? > > Hmmm, I think I've mismerged a patch somewhere along the line. In > this patch the reclaim tree walk is under the ->pag_ici_lock(), when > in fact it should be under the rcu_read_lock(). Good catch, Paul. > > As it is, being under the ->pag_ici_lock means that the tree is > consistent and we won't be seeing RCU freed inodes in the walk. > Hence the code is functioning correctly, just not as wasss intended. > > > (Again, if we do need to be under rcu_read_lock(), I highly recommend > > a debug check for rcu_read_lock_held().) > > Yup, which would have caught the merge screwup... ;-) > .... > > > > > > + /* > > > + * check for re-use of an inode within an RCU grace period due to the > > > + * radix tree nodes not being updated yet. We monitor for this by > > > + * setting the inode number to zero before freeing the inode structure. > > > + * If the inode has been reallocated and set up, then the inode number > > > + * will not match, so check for that, too. > > > + */ > > > spin_lock(&ip->i_flags_lock); > > > + if (ip->i_ino != ino) { > > > + trace_xfs_iget_skip(ip); > > > + XFS_STATS_INC(xs_ig_frecycle); > > > + spin_unlock(&ip->i_flags_lock); > > > + rcu_read_unlock(); > > > + /* Expire the grace period so we don't trip over it again. */ > > > + synchronize_rcu(); > > > > Hmmm... Interesting. Wouldn't the fact that we acquired the same lock > > that was held after removing the inode guarantee that an immediate retry > > would manage not to find this same inode again? > > That is what I'm not sure of. I was more worried about resolving the > contents of the radix tree nodes, not so much the inode itself. If a > new traversal will resolve the tree correctly (which is what you are > implying), then synchronize_rcu() is not needed.... Here is the sequence of events that I believe must be in place: 1. Some CPU removes the vfs_inode from the radix tree, presumably while holding some lock whose identity does not matter here. 2. Before invoking call_rcu() on a given vfs_inode, this same CPU clears the inode number while holding ->i_flags_lock. If the CPU in #1 and #2 might be different, then either CPU #1 must hold ->i_flags_lock while removing the vfs_inode from the radix tree, or I don't understand how this can work even with the synchronize_rcu(). 3. Some CPU, possibly different than that in #1 and #2 above, executes the above code. If locking works correctly, it must see the earlier changes, so a subsequent access should see the results of #1 above, so that it won't see the element that was removed there. That said, I don't claim to understand either vfs or xfs very well, so I would be arbitrarily deeply confused. > > If this is not the case, then readers finding it again will not be > > protected by the RCU grace period, right? > > > > In short, I don't understand why the synchronize_rcu() is needed. > > If it is somehow helping, that sounds to me like it is covering up > > a real bug that should be fixed separately. > > It isn't covering up a bug, it was more tryingt o be consistent with > the rest of the xfs_inode lookup failures - we back off and try > again later. If that is unnecessary resolve the RCU lookup race, > then it can be dropped. OK, please let me know whether my sequence of steps above makes sense. > > > @@ -397,7 +423,7 @@ xfs_iget( > > > xfs_agino_t agino; > > > > > > /* reject inode numbers outside existing AGs */ > > > - if (XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) > > > + if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) > > > > For the above check to be safe, don't we need to already be in an > > RCU read-side critical section? Or is something else protecting us? > > "ino" is the inode number used as the lookup key to find the struct > xfs_inode. This is ensuring we don't try to look up an inode number > of zero given it's new special meaning as a freed inode. Hence it > can be safely validated outside the RCU read-side critical sectioni > as it is a constant. Ah, OK, got it! Thanx, Paul > Thanks for the review, Paul. I'll fix up the issues you've pointed > out and retest. > > Cheers, > > Dave. > -- > Dave Chinner > david@fromorbit.com From SRS0+dQqb+18+fromorbit.com=dave@internode.on.net Tue Dec 14 19:23:28 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF1NRcn159514 for ; Tue, 14 Dec 2010 19:23:28 -0600 X-ASG-Debug-ID: 1292376318-5e4802830000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1C9001EC89B for ; Tue, 14 Dec 2010 17:25:18 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id RdSE90aRFNplgCw1 for ; Tue, 14 Dec 2010 17:25:18 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 38498724-1927428 for ; Wed, 15 Dec 2010 11:55:17 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PSg7H-00064I-VZ for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:25:16 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PSg5d-0004HE-NN for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:23:33 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 3/7] xfs: factor post-write newsize updates Subject: [PATCH 3/7] xfs: factor post-write newsize updates Date: Wed, 15 Dec 2010 12:23:24 +1100 Message-Id: <1292376208-16282-4-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292376208-16282-1-git-send-email-david@fromorbit.com> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292376320 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49453 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_file.c | 43 +++++++++++++++++++++---------------------- 1 files changed, 21 insertions(+), 22 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index 42adfff..4608aab 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -345,6 +345,25 @@ xfs_aio_write_isize_update( } } +/* + * If this was a direct or synchronous I/O that failed (such as ENOSPC) then + * part of the I/O may have been written to disk before the error occured. In + * this case the on-disk file size may have been adjusted beyond the in-memory + * file size and now needs to be truncated back. + */ +STATIC void +xfs_aio_write_newsize_update( + struct xfs_inode *ip) +{ + if (ip->i_new_size) { + xfs_ilock(ip, XFS_ILOCK_EXCL); + ip->i_new_size = 0; + if (ip->i_d.di_size > ip->i_size) + ip->i_d.di_size = ip->i_size; + xfs_iunlock(ip, XFS_ILOCK_EXCL); + } +} + STATIC ssize_t xfs_file_splice_write( struct pipe_inode_info *pipe, @@ -381,14 +400,7 @@ xfs_file_splice_write( ret = generic_file_splice_write(pipe, outfilp, ppos, count, flags); xfs_aio_write_isize_update(inode, ppos, ret); - - if (ip->i_new_size) { - xfs_ilock(ip, XFS_ILOCK_EXCL); - ip->i_new_size = 0; - if (ip->i_d.di_size > ip->i_size) - ip->i_d.di_size = ip->i_size; - xfs_iunlock(ip, XFS_ILOCK_EXCL); - } + xfs_aio_write_newsize_update(ip); xfs_iunlock(ip, XFS_IOLOCK_EXCL); return ret; } @@ -786,20 +798,7 @@ write_retry: } out_unlock_internal: - if (ip->i_new_size) { - xfs_ilock(ip, XFS_ILOCK_EXCL); - ip->i_new_size = 0; - /* - * If this was a direct or synchronous I/O that failed (such - * as ENOSPC) then part of the I/O may have been written to - * disk before the error occured. In this case the on-disk - * file size may have been adjusted beyond the in-memory file - * size and now needs to be truncated back. - */ - if (ip->i_d.di_size > ip->i_size) - ip->i_d.di_size = ip->i_size; - xfs_iunlock(ip, XFS_ILOCK_EXCL); - } + xfs_aio_write_newsize_update(ip); xfs_iunlock(ip, iolock); out_unlock_mutex: if (need_i_mutex) -- 1.7.2.3 From SRS0+dQqb+18+fromorbit.com=dave@internode.on.net Tue Dec 14 19:23:28 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF1NR6T159515 for ; Tue, 14 Dec 2010 19:23:28 -0600 X-ASG-Debug-ID: 1292376318-188902e70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D63101CC777D for ; Tue, 14 Dec 2010 17:25:18 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id jC9gZ7zx1aPYIKBH for ; Tue, 14 Dec 2010 17:25:18 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49873086-1927428 for ; Wed, 15 Dec 2010 11:55:17 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PSg7I-00064W-5r for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:25:16 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PSg5d-0004HQ-Ty for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:23:33 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 7/7] xfs: serialise unaligned direct IOs Subject: [PATCH 7/7] xfs: serialise unaligned direct IOs Date: Wed, 15 Dec 2010 12:23:28 +1100 Message-Id: <1292376208-16282-8-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292376208-16282-1-git-send-email-david@fromorbit.com> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292376319 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49453 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner When two concurrent unaligned, non-overlapping direct IOs are issued to the same block, the direct Io layer will race to zero the block. The result is that one of the concurrent IOs will overwrite data written by the other IO with zeros. This is demonstrated by the xfsqa test 240. To avoid this problem, serialise all unaligned direct IOs to an inode with a big hammer. We need a big hammer approach as we need to serialise AIO as well, so we can't just block writes on locks. Hence, the big hammer is calling xfs_ioend_wait() while holding out other unaligned direct IOs from starting. We don't bother trying to serialised aligned vs unaligned IOs as they are overlapping IO and the result of concurrent overlapping IOs is undefined - the result of either IO is a valid result so we let them race. Hence we only penalise unaligned IO, which already has a major overhead compared to aligned IO so this isn't a major problem. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_file.c | 29 ++++++++++++++++++++++++----- 1 files changed, 24 insertions(+), 5 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index 269da12..68f88a5 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -648,10 +648,21 @@ xfs_file_aio_write_checks( * xfs_file_dio_aio_write - handle direct IO writes * * Lock the inode appropriately to prepare for and issue a direct IO write. - * By spearating it from the buffered write path we remove all the tricky to + * By separating it from the buffered write path we remove all the tricky to * follow locking changes and looping. This also clearly indicates that XFS * does not fall back to buffered IO in the direct IO write path. * + * In most cases the direct IO writes will be done with IOLOCK_SHARED allowing + * them to be done in parallel with reads and other direct IO writes. However, + * if the IO is not aligned to filesystem blocks, the direct IO layer needs to + * do sub-block zeroing and that requires serialisation against other direct + * IOs to the same block. In this case we need to serialise the submission of + * the unaligned IOs so that we don't get racing block zeroing in the dio layer. + * To avoid the problem with aio, we also need to wait for outstanding IOs to + * complete so that unwritten extent conversion is completed before we try to + * map the overlapping block. This is currently implemented by hitting it + * with a big hammer (i.e. xfs_ioend_wait()). + * * Returns with locks held indicated by @need_i_mutex and @iolock. */ STATIC ssize_t @@ -671,6 +682,7 @@ xfs_file_dio_aio_write( struct xfs_mount *mp = ip->i_mount; ssize_t error = 0; size_t count = ocount; + int unaligned_io = 0; xfs_buftarg_t *target = XFS_IS_REALTIME_INODE(ip) ? mp->m_rtdev_targp : mp->m_ddev_targp; @@ -679,10 +691,15 @@ xfs_file_dio_aio_write( if ((pos & target->bt_smask) || (count & target->bt_smask)) return XFS_ERROR(-EINVAL); - if (mapping->nrpages || pos > ip->i_size) { + if ((pos & mp->m_blockmask) || ((pos + count) & mp->m_blockmask)) + unaligned_io = 1; + + if (unaligned_io || mapping->nrpages || pos > ip->i_size) { *iolock = XFS_IOLOCK_EXCL; *need_i_mutex = 1; mutex_lock(&inode->i_mutex); + if (unaligned_io) + xfs_ioend_wait(ip); } else { *iolock = XFS_IOLOCK_SHARED; } @@ -700,10 +717,12 @@ xfs_file_dio_aio_write( } if (*need_i_mutex) { - /* demote the lock now the cached pages are gone */ - xfs_ilock_demote(ip, XFS_IOLOCK_EXCL); + /* demote the lock now the cached pages are gone if we can */ + if (!unaligned_io) { + xfs_ilock_demote(ip, XFS_IOLOCK_EXCL); + *iolock = XFS_IOLOCK_SHARED; + } mutex_unlock(&inode->i_mutex); - *iolock = XFS_IOLOCK_SHARED; *need_i_mutex = 0; } -- 1.7.2.3 From SRS0+dQqb+18+fromorbit.com=dave@internode.on.net Tue Dec 14 19:23:28 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF1NSLi159519 for ; Tue, 14 Dec 2010 19:23:28 -0600 X-ASG-Debug-ID: 1292376319-188a02fb0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id F193F1CC7782 for ; Tue, 14 Dec 2010 17:25:19 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id mRDLhaGdsQdcVSoC for ; Tue, 14 Dec 2010 17:25:19 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50369411-1927428 for ; Wed, 15 Dec 2010 11:55:18 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PSg7H-00064H-Tu for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:25:15 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PSg5d-0004HB-Lg for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:23:33 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 2/7] xfs: factor common post-write isize handling code Subject: [PATCH 2/7] xfs: factor common post-write isize handling code Date: Wed, 15 Dec 2010 12:23:23 +1100 Message-Id: <1292376208-16282-3-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292376208-16282-1-git-send-email-david@fromorbit.com> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292376320 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49453 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_file.c | 52 +++++++++++++++++++++++------------------- 1 files changed, 28 insertions(+), 24 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index e1eaec2..42adfff 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -321,6 +321,30 @@ xfs_file_splice_read( return ret; } +STATIC void +xfs_aio_write_isize_update( + struct inode *inode, + loff_t *ppos, + ssize_t bytes_written) +{ + struct xfs_inode *ip = XFS_I(inode); + xfs_fsize_t isize = i_size_read(inode); + + if (bytes_written > 0) + XFS_STATS_ADD(xs_write_bytes, bytes_written); + + if (unlikely(bytes_written < 0 && bytes_written != -EFAULT && + *ppos > isize)) + *ppos = isize; + + if (*ppos > ip->i_size) { + xfs_ilock(ip, XFS_ILOCK_EXCL); + if (*ppos > ip->i_size) + ip->i_size = *ppos; + xfs_iunlock(ip, XFS_ILOCK_EXCL); + } +} + STATIC ssize_t xfs_file_splice_write( struct pipe_inode_info *pipe, @@ -331,7 +355,7 @@ xfs_file_splice_write( { struct inode *inode = outfilp->f_mapping->host; struct xfs_inode *ip = XFS_I(inode); - xfs_fsize_t isize, new_size; + xfs_fsize_t new_size; int ioflags = 0; ssize_t ret; @@ -355,19 +379,8 @@ xfs_file_splice_write( trace_xfs_file_splice_write(ip, count, *ppos, ioflags); ret = generic_file_splice_write(pipe, outfilp, ppos, count, flags); - if (ret > 0) - XFS_STATS_ADD(xs_write_bytes, ret); - - isize = i_size_read(inode); - if (unlikely(ret < 0 && ret != -EFAULT && *ppos > isize)) - *ppos = isize; - if (*ppos > ip->i_size) { - xfs_ilock(ip, XFS_ILOCK_EXCL); - if (*ppos > ip->i_size) - ip->i_size = *ppos; - xfs_iunlock(ip, XFS_ILOCK_EXCL); - } + xfs_aio_write_isize_update(inode, ppos, ret); if (ip->i_new_size) { xfs_ilock(ip, XFS_ILOCK_EXCL); @@ -576,7 +589,7 @@ xfs_file_aio_write( struct xfs_mount *mp = ip->i_mount; ssize_t ret = 0, error = 0; int ioflags = 0; - xfs_fsize_t isize, new_size; + xfs_fsize_t new_size; int iolock; size_t ocount = 0, count; int need_i_mutex; @@ -742,16 +755,7 @@ write_retry: current->backing_dev_info = NULL; - isize = i_size_read(inode); - if (unlikely(ret < 0 && ret != -EFAULT && iocb->ki_pos > isize)) - iocb->ki_pos = isize; - - if (iocb->ki_pos > ip->i_size) { - xfs_ilock(ip, XFS_ILOCK_EXCL); - if (iocb->ki_pos > ip->i_size) - ip->i_size = iocb->ki_pos; - xfs_iunlock(ip, XFS_ILOCK_EXCL); - } + xfs_aio_write_isize_update(inode, &iocb->ki_pos, ret); error = -ret; if (ret <= 0) -- 1.7.2.3 From SRS0+dQqb+18+fromorbit.com=dave@internode.on.net Tue Dec 14 19:23:31 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF1NUNC159549 for ; Tue, 14 Dec 2010 19:23:30 -0600 X-ASG-Debug-ID: 1292376320-2863028c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DCA6514519C6 for ; Tue, 14 Dec 2010 17:25:21 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id 78i5YUhZshfnDhty for ; Tue, 14 Dec 2010 17:25:21 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50369412-1927428 for ; Wed, 15 Dec 2010 11:55:17 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PSg7I-00064P-4H for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:25:16 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PSg5d-0004HN-SL for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:23:33 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 6/7] xfs: factor common write setup code Subject: [PATCH 6/7] xfs: factor common write setup code Date: Wed, 15 Dec 2010 12:23:27 +1100 Message-Id: <1292376208-16282-7-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292376208-16282-1-git-send-email-david@fromorbit.com> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292376322 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49452 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The buffered IO and direct Io write paths share a common set of checks and limiting code prior to issuing the write. Factor that into a common helper function. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_file.c | 130 ++++++++++++++++++++----------------------- 1 files changed, 61 insertions(+), 69 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index e10e703..269da12 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -588,6 +588,63 @@ out_lock: } /* + * Common pre-write limit and setup checks. + * + * Returns with iolock held according to @iolock. + */ +STATIC ssize_t +xfs_file_aio_write_checks( + struct file *file, + loff_t *pos, + size_t *count, + int *iolock) +{ + struct inode *inode = file->f_mapping->host; + struct xfs_inode *ip = XFS_I(inode); + xfs_fsize_t new_size; + int error; + + xfs_ilock(ip, XFS_ILOCK_EXCL|*iolock); + + error = generic_write_checks(file, pos, count, S_ISBLK(inode->i_mode)); + if (error) { + xfs_iunlock(ip, XFS_ILOCK_EXCL|*iolock); + *iolock = 0; + return error; + } + + new_size = *pos + *count; + if (new_size > ip->i_size) + ip->i_new_size = new_size; + + if (likely(!(file->f_mode & FMODE_NOCMTIME))) + file_update_time(file); + + /* + * If the offset is beyond the size of the file, we need to zero any + * blocks that fall between the existing EOF and the start of this + * write. + */ + if (*pos > ip->i_size) { + error = -xfs_zero_eof(ip, *pos, ip->i_size); + if (error) { + xfs_iunlock(ip, XFS_ILOCK_EXCL); + return error; + } + } + xfs_iunlock(ip, XFS_ILOCK_EXCL); + + /* + * If we're writing the file then make sure to clear the setuid and + * setgid bits if the process is not being run by root. This keeps + * people from modifying setuid and setgid binaries. + */ + error = file_remove_suid(file); + return error; + +} + +/* * xfs_file_dio_aio_write - handle direct IO writes * * Lock the inode appropriately to prepare for and issue a direct IO write. @@ -613,7 +670,6 @@ xfs_file_dio_aio_write( struct xfs_inode *ip = XFS_I(inode); struct xfs_mount *mp = ip->i_mount; ssize_t error = 0; - xfs_fsize_t new_size; size_t count = ocount; xfs_buftarg_t *target = XFS_IS_REALTIME_INODE(ip) ? mp->m_rtdev_targp : mp->m_ddev_targp; @@ -630,47 +686,9 @@ xfs_file_dio_aio_write( } else { *iolock = XFS_IOLOCK_SHARED; } - xfs_ilock(ip, XFS_ILOCK_EXCL|*iolock); - - error = generic_write_checks(file, &pos, &count, - S_ISBLK(inode->i_mode)); - if (error) { - xfs_iunlock(ip, XFS_ILOCK_EXCL|*iolock); - *iolock = 0; - return error; - } - new_size = pos + count; - if (new_size > ip->i_size) - ip->i_new_size = new_size; - - if (likely(!(file->f_mode & FMODE_NOCMTIME))) - file_update_time(file); - - /* - * If the offset is beyond the size of the file, we have a couple of - * things to do. First, if there is already space allocated we need to - * either create holes or zero the disk or ... - * - * If there is a page where the previous size lands, we need to zero it - * out up to the new size. - */ - if (pos > ip->i_size) { - error = -xfs_zero_eof(ip, pos, ip->i_size); - if (error) { - xfs_iunlock(ip, XFS_ILOCK_EXCL); - return error; - } - } - xfs_iunlock(ip, XFS_ILOCK_EXCL); - - /* - * If we're writing the file then make sure to clear the setuid and - * setgid bits if the process is not being run by root. This keeps - * people from modifying setuid and setgid binaries. - */ - error = file_remove_suid(file); - if (unlikely(error)) + error = xfs_file_aio_write_checks(file, &pos, &count, iolock); + if (error) return error; if (mapping->nrpages) { @@ -713,40 +731,14 @@ xfs_file_buffered_aio_write( struct xfs_inode *ip = XFS_I(inode); ssize_t ret = 0, error = 0; int enospc = 0; - xfs_fsize_t new_size; size_t count = ocount; *iolock = XFS_IOLOCK_EXCL; *need_i_mutex = 1; mutex_lock(&inode->i_mutex); - xfs_ilock(ip, XFS_ILOCK_EXCL|*iolock); - - error = generic_write_checks(file, &pos, &count, - S_ISBLK(inode->i_mode)); - if (error) { - xfs_iunlock(ip, XFS_ILOCK_EXCL|*iolock); - *iolock = 0; - return error; - } - - new_size = pos + count; - if (new_size > ip->i_size) - ip->i_new_size = new_size; - if (likely(!(file->f_mode & FMODE_NOCMTIME))) - file_update_time(file); - - if (pos > ip->i_size) { - error = -xfs_zero_eof(ip, pos, ip->i_size); - if (error) { - xfs_iunlock(ip, XFS_ILOCK_EXCL); - return error; - } - } - xfs_iunlock(ip, XFS_ILOCK_EXCL); - - error = file_remove_suid(file); - if (unlikely(error)) + error = xfs_file_aio_write_checks(file, &pos, &count, iolock); + if (error) return error; /* We can write back this queue in page reclaim */ -- 1.7.2.3 From SRS0+AWmN+18+fromorbit.com=dave@internode.on.net Tue Dec 14 19:23:28 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF1NRRO159513 for ; Tue, 14 Dec 2010 19:23:28 -0600 X-ASG-Debug-ID: 1292376318-188b030b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 057BA1CC7780 for ; Tue, 14 Dec 2010 17:25:18 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id 5cTGylSFUl60f1AT for ; Tue, 14 Dec 2010 17:25:18 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50125664-1927428 for ; Wed, 15 Dec 2010 11:55:17 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PSg7H-00064F-SC for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:25:15 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PSg5d-0004H7-Hq for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:23:33 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 0/7] xfs: serialise unaligned direct IOs Subject: [PATCH 0/7] xfs: serialise unaligned direct IOs Date: Wed, 15 Dec 2010 12:23:21 +1100 Message-Id: <1292376208-16282-1-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292376320 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49453 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Folks, This series aims to serialise unaligned direct IOs to an inode to avoid corruption causedby sub-block zeroing races. The previous approaches at the direct IO layer fail because for !DIO_LOCKING filesystems like XFS, there is no way we can track and serialise all the direct IOs to a given inode in a race free manner. While we can track them, we cannot close the races between mapping blocks and tracked IO completion occuring before subsequent tracking lookups without adding some kind of locking to the DIO layer. Hence for !DIO_LOCKING users, unaligned direct IO needs to be serialised at a higher layer. Because the xfs_file_aio_write() path is so twisted and difficult to follow, adding new locking cases to the code is difficult to verify that it is correct in all cases. Hence the series starts by cleaning up the code and splitting apart the direct IO and buffered IO paths before adding the unaligned direct IO detection and serialisation. The first patch fixes a sync write error handling bug - we should consider pushing that to .38. The next patches factor code that is common to write and splice into helpers. The direct and buffered IO paths are then separated out and the common write checks and bounds limiting is factored out into a helper. Finally, the serialisation of unaligned direct IOs is added by a big-hammer approach. That is, we take the i_mutex and XFS_IOLOCK_EXCL and hold them across the unaligned IO submission. This means that unaligned direct IO submission is serialised, and non-AIO DIO is serialised completely. For unaligned AIO DIO, this would only serialise the submission of the DIO, leaving the sub-block zeroing races open for unaligned writes into unwritten extents. To avoid this problem, we use xfs_ioend_wait() to ensure all AIO writes have completed before we submit the unaligned write. We do this wait holding the i_mutex so we serialise against other unaligned AIO as there is no need to serialise against aligned DIO. The following changes since commit cf7d7e5a1980d1116ee152d25dac382b112b9c17: Linux 2.6.37-rc5 (2010-12-06 20:09:04 -0800) are available in the git repository at: git://git.kernel.org/pub/scm/linux/dgc/xfsdev.git aio-unaligned Dave Chinner (7): xfs: ensure sync write errors are returned xfs: factor common post-write isize handling code xfs: factor post-write newsize updates xfs: split direct IO write path from xfs_file_aio_write xfs: split buffered IO write path from xfs_file_aio_write xfs: factor common write setup code xfs: serialise unaligned direct IOs fs/xfs/linux-2.6/xfs_file.c | 440 ++++++++++++++++++++++++------------------- 1 files changed, 248 insertions(+), 192 deletions(-) From SRS0+dQqb+18+fromorbit.com=dave@internode.on.net Tue Dec 14 19:23:31 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF1NVGF159560 for ; Tue, 14 Dec 2010 19:23:31 -0600 X-ASG-Debug-ID: 1292376322-188102ec0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1FCC21CC7782 for ; Tue, 14 Dec 2010 17:25:23 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id yFpTkjoMbtgfUYRu for ; Tue, 14 Dec 2010 17:25:23 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49873093-1927428 for ; Wed, 15 Dec 2010 11:55:22 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PSg7H-00064G-SJ for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:25:15 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PSg5d-0004H9-JU for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:23:33 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 1/7] xfs: ensure sync write errors are returned Subject: [PATCH 1/7] xfs: ensure sync write errors are returned Date: Wed, 15 Dec 2010 12:23:22 +1100 Message-Id: <1292376208-16282-2-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292376208-16282-1-git-send-email-david@fromorbit.com> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292376324 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49453 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner xfs_file_aio_write() only returns the error from synchronous flushing of the data and inode if error == 0. At the point where error is being checked, it is guaranteed to be > 0. Therefore any errors returned by the data or fsync flush will never be returned. Fix the checks so we overwrite the current error once and only if an error really occurred. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_file.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index ba8ad42..e1eaec2 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -769,7 +769,7 @@ write_retry: mutex_unlock(&inode->i_mutex); error2 = filemap_write_and_wait_range(mapping, pos, end); - if (!error) + if (error2) error = error2; if (need_i_mutex) mutex_lock(&inode->i_mutex); @@ -777,7 +777,7 @@ write_retry: error2 = -xfs_file_fsync(file, (file->f_flags & __O_SYNC) ? 0 : 1); - if (!error) + if (error2 && error >= 0) error = error2; } -- 1.7.2.3 From SRS0+dQqb+18+fromorbit.com=dave@internode.on.net Tue Dec 14 19:23:37 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF1Naf0159598 for ; Tue, 14 Dec 2010 19:23:37 -0600 X-ASG-Debug-ID: 1292376327-188302d30000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 809A61CC7786 for ; Tue, 14 Dec 2010 17:25:28 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id R5TXmGx2cSdwXBjs for ; Tue, 14 Dec 2010 17:25:28 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49873103-1927428 for ; Wed, 15 Dec 2010 11:55:27 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PSg7R-00064J-WE for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:25:26 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PSg5d-0004HH-P0 for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:23:33 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 4/7] xfs: split direct IO write path from xfs_file_aio_write Subject: [PATCH 4/7] xfs: split direct IO write path from xfs_file_aio_write Date: Wed, 15 Dec 2010 12:23:25 +1100 Message-Id: <1292376208-16282-5-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292376208-16282-1-git-send-email-david@fromorbit.com> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292376329 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49453 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The current xfs_file_aio_write code is a mess of locking shenanigans to handle the different locking requirements of buffered and direct IO. Start to clean this up by disentangling the direct IO path from the mess. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_file.c | 184 +++++++++++++++++++++++++++--------------- 1 files changed, 118 insertions(+), 66 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index 4608aab..d70a249 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -587,6 +587,116 @@ out_lock: return error; } +/* + * xfs_file_dio_aio_write - handle direct IO writes + * + * Lock the inode appropriately to prepare for and issue a direct IO write. + * By spearating it from the buffered write path we remove all the tricky to + * follow locking changes and looping. This also clearly indicates that XFS + * does not fall back to buffered IO in the direct IO write path. + * + * Returns with locks held indicated by @need_i_mutex and @iolock. + */ +STATIC ssize_t +xfs_file_dio_aio_write( + struct kiocb *iocb, + const struct iovec *iovp, + unsigned long nr_segs, + loff_t pos, + size_t ocount, + int *need_i_mutex, + int *iolock) +{ + struct file *file = iocb->ki_filp; + struct address_space *mapping = file->f_mapping; + struct inode *inode = mapping->host; + struct xfs_inode *ip = XFS_I(inode); + struct xfs_mount *mp = ip->i_mount; + ssize_t error = 0; + xfs_fsize_t new_size; + size_t count = ocount; + xfs_buftarg_t *target = XFS_IS_REALTIME_INODE(ip) ? + mp->m_rtdev_targp : mp->m_ddev_targp; + + *need_i_mutex = 0; + *iolock = 0; + if ((pos & target->bt_smask) || (count & target->bt_smask)) + return XFS_ERROR(-EINVAL); + + if (mapping->nrpages || pos > ip->i_size) { + *iolock = XFS_IOLOCK_EXCL; + *need_i_mutex = 1; + mutex_lock(&inode->i_mutex); + } else { + *iolock = XFS_IOLOCK_SHARED; + } + xfs_ilock(ip, XFS_ILOCK_EXCL|*iolock); + + error = generic_write_checks(file, &pos, &count, + S_ISBLK(inode->i_mode)); + if (error) { + xfs_iunlock(ip, XFS_ILOCK_EXCL|*iolock); + *iolock = 0; + return error; + } + + new_size = pos + count; + if (new_size > ip->i_size) + ip->i_new_size = new_size; + + if (likely(!(file->f_mode & FMODE_NOCMTIME))) + file_update_time(file); + + /* + * If the offset is beyond the size of the file, we have a couple of + * things to do. First, if there is already space allocated we need to + * either create holes or zero the disk or ... + * + * If there is a page where the previous size lands, we need to zero it + * out up to the new size. + */ + if (pos > ip->i_size) { + error = -xfs_zero_eof(ip, pos, ip->i_size); + if (error) { + xfs_iunlock(ip, XFS_ILOCK_EXCL); + return error; + } + } + xfs_iunlock(ip, XFS_ILOCK_EXCL); + + /* + * If we're writing the file then make sure to clear the setuid and + * setgid bits if the process is not being run by root. This keeps + * people from modifying setuid and setgid binaries. + */ + error = file_remove_suid(file); + if (unlikely(error)) + return error; + + if (mapping->nrpages) { + WARN_ON(*need_i_mutex == 0); + error = -xfs_flushinval_pages(ip, (pos & PAGE_CACHE_MASK), -1, + FI_REMAPF_LOCKED); + if (error) + return error; + } + + if (*need_i_mutex) { + /* demote the lock now the cached pages are gone */ + xfs_ilock_demote(ip, XFS_IOLOCK_EXCL); + mutex_unlock(&inode->i_mutex); + *iolock = XFS_IOLOCK_SHARED; + *need_i_mutex = 0; + } + + trace_xfs_file_direct_write(ip, count, iocb->ki_pos, 0); + error = generic_file_direct_write(iocb, iovp, + &nr_segs, pos, &iocb->ki_pos, count, ocount); + + /* No fallback to buffered IO on errors for XFS. */ + return error; +} + STATIC ssize_t xfs_file_aio_write( struct kiocb *iocb, @@ -628,19 +738,17 @@ xfs_file_aio_write( if (XFS_FORCED_SHUTDOWN(mp)) return -EIO; -relock: if (ioflags & IO_ISDIRECT) { - iolock = XFS_IOLOCK_SHARED; - need_i_mutex = 0; - } else { - iolock = XFS_IOLOCK_EXCL; - need_i_mutex = 1; - mutex_lock(&inode->i_mutex); + ret = xfs_file_dio_aio_write(iocb, iovp, nr_segs, pos, + ocount, &need_i_mutex, &iolock); + goto done_io; } + iolock = XFS_IOLOCK_EXCL; + need_i_mutex = 1; + mutex_lock(&inode->i_mutex); xfs_ilock(ip, XFS_ILOCK_EXCL|iolock); -start: error = -generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode)); if (error) { @@ -648,26 +756,6 @@ start: goto out_unlock_mutex; } - if (ioflags & IO_ISDIRECT) { - xfs_buftarg_t *target = - XFS_IS_REALTIME_INODE(ip) ? - mp->m_rtdev_targp : mp->m_ddev_targp; - - if ((pos & target->bt_smask) || (count & target->bt_smask)) { - xfs_iunlock(ip, XFS_ILOCK_EXCL|iolock); - return XFS_ERROR(-EINVAL); - } - - if (!need_i_mutex && (mapping->nrpages || pos > ip->i_size)) { - xfs_iunlock(ip, XFS_ILOCK_EXCL|iolock); - iolock = XFS_IOLOCK_EXCL; - need_i_mutex = 1; - mutex_lock(&inode->i_mutex); - xfs_ilock(ip, XFS_ILOCK_EXCL|iolock); - goto start; - } - } - new_size = pos + count; if (new_size > ip->i_size) ip->i_new_size = new_size; @@ -706,44 +794,7 @@ start: /* We can write back this queue in page reclaim */ current->backing_dev_info = mapping->backing_dev_info; - if ((ioflags & IO_ISDIRECT)) { - if (mapping->nrpages) { - WARN_ON(need_i_mutex == 0); - error = xfs_flushinval_pages(ip, - (pos & PAGE_CACHE_MASK), - -1, FI_REMAPF_LOCKED); - if (error) - goto out_unlock_internal; - } - - if (need_i_mutex) { - /* demote the lock now the cached pages are gone */ - xfs_ilock_demote(ip, XFS_IOLOCK_EXCL); - mutex_unlock(&inode->i_mutex); - - iolock = XFS_IOLOCK_SHARED; - need_i_mutex = 0; - } - - trace_xfs_file_direct_write(ip, count, iocb->ki_pos, ioflags); - ret = generic_file_direct_write(iocb, iovp, - &nr_segs, pos, &iocb->ki_pos, count, ocount); - - /* - * direct-io write to a hole: fall through to buffered I/O - * for completing the rest of the request. - */ - if (ret >= 0 && ret != count) { - XFS_STATS_ADD(xs_write_bytes, ret); - - pos += ret; - count -= ret; - - ioflags &= ~IO_ISDIRECT; - xfs_iunlock(ip, iolock); - goto relock; - } - } else { + if (!(ioflags & IO_ISDIRECT)) { int enospc = 0; ssize_t ret2 = 0; @@ -767,6 +818,7 @@ write_retry: current->backing_dev_info = NULL; +done_io: xfs_aio_write_isize_update(inode, &iocb->ki_pos, ret); error = -ret; -- 1.7.2.3 From SRS0+dQqb+18+fromorbit.com=dave@internode.on.net Tue Dec 14 19:23:37 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF1NaRg159599 for ; Tue, 14 Dec 2010 19:23:37 -0600 X-ASG-Debug-ID: 1292376328-5e4802860000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B45971EC8A0 for ; Tue, 14 Dec 2010 17:25:28 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id LD9I4yWVSWnw1BNX for ; Tue, 14 Dec 2010 17:25:28 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50369427-1927428 for ; Wed, 15 Dec 2010 11:55:27 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PSg7I-00064M-2e for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:25:16 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PSg5d-0004HK-Qd for xfs@oss.sgi.com; Wed, 15 Dec 2010 12:23:33 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 5/7] xfs: split buffered IO write path from xfs_file_aio_write Subject: [PATCH 5/7] xfs: split buffered IO write path from xfs_file_aio_write Date: Wed, 15 Dec 2010 12:23:26 +1100 Message-Id: <1292376208-16282-6-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292376208-16282-1-git-send-email-david@fromorbit.com> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292376329 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49453 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Complete the split of the different write IO paths by splitting the buffered IO write path out of xfs_file_aio_write(). This makes the different mechanisms of the write patchs easier to follow. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_file.c | 160 ++++++++++++++++++++----------------------- 1 files changed, 75 insertions(+), 85 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c index d70a249..e10e703 100644 --- a/fs/xfs/linux-2.6/xfs_file.c +++ b/fs/xfs/linux-2.6/xfs_file.c @@ -698,132 +698,123 @@ xfs_file_dio_aio_write( } STATIC ssize_t -xfs_file_aio_write( +xfs_file_buffered_aio_write( struct kiocb *iocb, const struct iovec *iovp, unsigned long nr_segs, - loff_t pos) + loff_t pos, + size_t ocount, + int *need_i_mutex, + int *iolock) { struct file *file = iocb->ki_filp; struct address_space *mapping = file->f_mapping; struct inode *inode = mapping->host; struct xfs_inode *ip = XFS_I(inode); - struct xfs_mount *mp = ip->i_mount; ssize_t ret = 0, error = 0; - int ioflags = 0; + int enospc = 0; xfs_fsize_t new_size; - int iolock; - size_t ocount = 0, count; - int need_i_mutex; - - XFS_STATS_INC(xs_write_calls); - - BUG_ON(iocb->ki_pos != pos); - - if (unlikely(file->f_flags & O_DIRECT)) - ioflags |= IO_ISDIRECT; - if (file->f_mode & FMODE_NOCMTIME) - ioflags |= IO_INVIS; - - error = generic_segment_checks(iovp, &nr_segs, &ocount, VERIFY_READ); - if (error) - return error; - - count = ocount; - if (count == 0) - return 0; - - xfs_wait_for_freeze(mp, SB_FREEZE_WRITE); - - if (XFS_FORCED_SHUTDOWN(mp)) - return -EIO; - - if (ioflags & IO_ISDIRECT) { - ret = xfs_file_dio_aio_write(iocb, iovp, nr_segs, pos, - ocount, &need_i_mutex, &iolock); - goto done_io; - } + size_t count = ocount; - iolock = XFS_IOLOCK_EXCL; - need_i_mutex = 1; + *iolock = XFS_IOLOCK_EXCL; + *need_i_mutex = 1; mutex_lock(&inode->i_mutex); - xfs_ilock(ip, XFS_ILOCK_EXCL|iolock); + xfs_ilock(ip, XFS_ILOCK_EXCL|*iolock); - error = -generic_write_checks(file, &pos, &count, + error = generic_write_checks(file, &pos, &count, S_ISBLK(inode->i_mode)); if (error) { - xfs_iunlock(ip, XFS_ILOCK_EXCL|iolock); - goto out_unlock_mutex; + xfs_iunlock(ip, XFS_ILOCK_EXCL|*iolock); + *iolock = 0; + return error; } new_size = pos + count; if (new_size > ip->i_size) ip->i_new_size = new_size; - if (likely(!(ioflags & IO_INVIS))) + if (likely(!(file->f_mode & FMODE_NOCMTIME))) file_update_time(file); - /* - * If the offset is beyond the size of the file, we have a couple - * of things to do. First, if there is already space allocated - * we need to either create holes or zero the disk or ... - * - * If there is a page where the previous size lands, we need - * to zero it out up to the new size. - */ - if (pos > ip->i_size) { - error = xfs_zero_eof(ip, pos, ip->i_size); + error = -xfs_zero_eof(ip, pos, ip->i_size); if (error) { xfs_iunlock(ip, XFS_ILOCK_EXCL); - goto out_unlock_internal; + return error; } } xfs_iunlock(ip, XFS_ILOCK_EXCL); - /* - * If we're writing the file then make sure to clear the - * setuid and setgid bits if the process is not being run - * by root. This keeps people from modifying setuid and - * setgid binaries. - */ - error = -file_remove_suid(file); + error = file_remove_suid(file); if (unlikely(error)) - goto out_unlock_internal; + return error; /* We can write back this queue in page reclaim */ current->backing_dev_info = mapping->backing_dev_info; - if (!(ioflags & IO_ISDIRECT)) { - int enospc = 0; - ssize_t ret2 = 0; - write_retry: - trace_xfs_file_buffered_write(ip, count, iocb->ki_pos, ioflags); - ret2 = generic_file_buffered_write(iocb, iovp, nr_segs, - pos, &iocb->ki_pos, count, ret); - /* - * if we just got an ENOSPC, flush the inode now we - * aren't holding any page locks and retry *once* - */ - if (ret2 == -ENOSPC && !enospc) { - error = xfs_flush_pages(ip, 0, -1, 0, FI_NONE); - if (error) - goto out_unlock_internal; - enospc = 1; - goto write_retry; - } - ret = ret2; + trace_xfs_file_buffered_write(ip, count, iocb->ki_pos, 0); + error = generic_file_buffered_write(iocb, iovp, nr_segs, + pos, &iocb->ki_pos, count, ret); + /* + * if we just got an ENOSPC, flush the inode now we aren't holding any + * page locks and retry *once* + */ + if (error == -ENOSPC && !enospc) { + error = -xfs_flush_pages(ip, 0, -1, 0, FI_NONE); + if (error) + return error; + enospc = 1; + goto write_retry; } - current->backing_dev_info = NULL; + return error; +} + +STATIC ssize_t +xfs_file_aio_write( + struct kiocb *iocb, + const struct iovec *iovp, + unsigned long nr_segs, + loff_t pos) +{ + struct file *file = iocb->ki_filp; + struct address_space *mapping = file->f_mapping; + struct inode *inode = mapping->host; + struct xfs_inode *ip = XFS_I(inode); + ssize_t ret = 0, error = 0; + int iolock; + size_t ocount = 0; + int need_i_mutex; + + XFS_STATS_INC(xs_write_calls); + + BUG_ON(iocb->ki_pos != pos); + + error = generic_segment_checks(iovp, &nr_segs, &ocount, VERIFY_READ); + if (error) + return error; + + if (ocount == 0) + return 0; + + xfs_wait_for_freeze(ip->i_mount, SB_FREEZE_WRITE); + + if (XFS_FORCED_SHUTDOWN(ip->i_mount)) + return -EIO; + + if (unlikely(file->f_flags & O_DIRECT)) + ret = xfs_file_dio_aio_write(iocb, iovp, nr_segs, pos, + ocount, &need_i_mutex, &iolock); + else + ret = xfs_file_buffered_aio_write(iocb, iovp, nr_segs, pos, + ocount, &need_i_mutex, &iolock); -done_io: xfs_aio_write_isize_update(inode, &iocb->ki_pos, ret); error = -ret; if (ret <= 0) - goto out_unlock_internal; + goto out_unlock; XFS_STATS_ADD(xs_write_bytes, ret); @@ -849,10 +840,9 @@ done_io: error = error2; } - out_unlock_internal: + out_unlock: xfs_aio_write_newsize_update(ip); xfs_iunlock(ip, iolock); - out_unlock_mutex: if (need_i_mutex) mutex_unlock(&inode->i_mutex); return -error; -- 1.7.2.3 From SRS0+NMKW+18+fromorbit.com=david@internode.on.net Tue Dec 14 20:49:05 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF2n4PR163108 for ; Tue, 14 Dec 2010 20:49:05 -0600 X-ASG-Debug-ID: 1292381455-178a03310000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 43C8E1ECFDE for ; Tue, 14 Dec 2010 18:50:55 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id UBe9ceeBNZqncP6Y for ; Tue, 14 Dec 2010 18:50:55 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50136834-1927428 for multiple; Wed, 15 Dec 2010 13:20:51 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PShS5-0006BW-Rx; Wed, 15 Dec 2010 13:50:49 +1100 Date: Wed, 15 Dec 2010 13:50:49 +1100 From: Dave Chinner To: "Paul E. McKenney" Cc: xfs@oss.sgi.com, eric.dumazet@gmail.com X-ASG-Orig-Subj: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Subject: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Message-ID: <20101215025049.GE9925@dastard> References: <1292203957-15819-1-git-send-email-david@fromorbit.com> <1292203957-15819-3-git-send-email-david@fromorbit.com> <20101214211801.GH2161@linux.vnet.ibm.com> <20101214230047.GC16267@dastard> <20101215010536.GT2161@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101215010536.GT2161@linux.vnet.ibm.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292381457 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49459 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 14, 2010 at 05:05:36PM -0800, Paul E. McKenney wrote: > On Wed, Dec 15, 2010 at 10:00:47AM +1100, Dave Chinner wrote: > > On Tue, Dec 14, 2010 at 01:18:01PM -0800, Paul E. McKenney wrote: > > > On Mon, Dec 13, 2010 at 12:32:36PM +1100, Dave Chinner wrote: > > > > + /* > > > > + * check for re-use of an inode within an RCU grace period due to the > > > > + * radix tree nodes not being updated yet. We monitor for this by > > > > + * setting the inode number to zero before freeing the inode structure. > > > > + * If the inode has been reallocated and set up, then the inode number > > > > + * will not match, so check for that, too. > > > > + */ > > > > spin_lock(&ip->i_flags_lock); > > > > + if (ip->i_ino != ino) { > > > > + trace_xfs_iget_skip(ip); > > > > + XFS_STATS_INC(xs_ig_frecycle); > > > > + spin_unlock(&ip->i_flags_lock); > > > > + rcu_read_unlock(); > > > > + /* Expire the grace period so we don't trip over it again. */ > > > > + synchronize_rcu(); > > > > > > Hmmm... Interesting. Wouldn't the fact that we acquired the same lock > > > that was held after removing the inode guarantee that an immediate retry > > > would manage not to find this same inode again? > > > > That is what I'm not sure of. I was more worried about resolving the > > contents of the radix tree nodes, not so much the inode itself. If a > > new traversal will resolve the tree correctly (which is what you are > > implying), then synchronize_rcu() is not needed.... > > Here is the sequence of events that I believe must be in place: > s/vfs_inode/xfs_inode/g > 1. Some CPU removes the vfs_inode from the radix tree, presumably > while holding some lock whose identity does not matter here. Yes, the ->pag_ici_lock. > 2. Before invoking call_rcu() on a given vfs_inode, this same > CPU clears the inode number while holding ->i_flags_lock. Not necessarily the same CPU - there are points where we take sleeping locks for synchronisation with any remaining users, and we don't use preempt_disable() to prevent a change of CPU on a preemptible kernel. > If the CPU in #1 and #2 might be different, then either > CPU #1 must hold ->i_flags_lock while removing the vfs_inode > from the radix tree, or I don't understand how this can work > even with the synchronize_rcu(). I'm probably missing something, but why does the CPU we run call_rcu() to free the inode on matter w.r.t. which CPU it was deleted from the radix tree on? There is this comment in include/linux/radix-tree.h: * It is still required that the caller manage the synchronization and lifetimes * of the items. So if RCU lock-free lookups are used, typically this would mean * that the items have their own locks, or are amenable to lock-free access; and * that the items are freed by RCU (or only freed after having been deleted from * the radix tree *and* a synchronize_rcu() grace period). There is nothing there that mentions the items need to be deleted on the same CPU as they were removed from the radix tree or that the item lock needs to be held when the item is removed from the tree. AFAICT, the XFS code is following these guidelines. FWIW, this is where is got the idea of using synchronize_rcu() to ensure a llokup retry wouldn't see the same freed inode. I'm thinking that simply re-running the lookup will give the same guarantee because of the memory barriers in the radix tree lookup code... > 3. Some CPU, possibly different than that in #1 and #2 above, > executes the above code. If locking works correctly, it > must see the earlier changes, so a subsequent access should > see the results of #1 above, so that it won't see the element > that was removed there. Isn't the item validity considered separately to the tree traversal consistency? i.e. the item lock (i.e. ->i_flags_lock) provides a safe item validity check via the unlock->lock memory barrier, whilst the radix tree uses rcu_dereference() to provide memory barriers against the modifications? > That said, I don't claim to understand either vfs or xfs very well, so > I would be arbitrarily deeply confused. We might both be confused ;) Cheers, Dave. -- Dave Chinner david@fromorbit.com From sgi-linux-xfs@lo.gmane.org Tue Dec 14 23:48:24 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF5mHKU172576 for ; Tue, 14 Dec 2010 23:48:23 -0600 X-ASG-Debug-ID: 1292392208-082c00460000-w1Z2WR X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from lo.gmane.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B5AE5145234A for ; Tue, 14 Dec 2010 21:50:08 -0800 (PST) Received: from lo.gmane.org (lo.gmane.org [80.91.229.12]) by cuda.sgi.com with ESMTP id ITGrhxFKWkLntQ56 for ; Tue, 14 Dec 2010 21:50:08 -0800 (PST) Received: from list by lo.gmane.org with local (Exim 4.69) (envelope-from ) id 1PSkFa-00030S-Cl for linux-xfs@oss.sgi.com; Wed, 15 Dec 2010 06:50:06 +0100 Received: from ppp121-45-207-179.lns20.cbr1.internode.on.net ([121.45.207.179]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 15 Dec 2010 06:50:06 +0100 Received: from npiggin by ppp121-45-207-179.lns20.cbr1.internode.on.net with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Wed, 15 Dec 2010 06:50:06 +0100 X-Injected-Via-Gmane: http://gmane.org/ To: linux-xfs@oss.sgi.com From: Nick Piggin X-ASG-Orig-Subj: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Subject: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Date: Wed, 15 Dec 2010 03:30:43 +0000 (UTC) Lines: 77 Message-ID: References: <1292203957-15819-1-git-send-email-david@fromorbit.com> <1292203957-15819-3-git-send-email-david@fromorbit.com> <20101214211801.GH2161@linux.vnet.ibm.com> <20101214230047.GC16267@dastard> <20101215010536.GT2161@linux.vnet.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@dough.gmane.org X-Gmane-NNTP-Posting-Host: sea.gmane.org User-Agent: Loom/3.14 (http://gmane.org/) X-Loom-IP: 121.45.207.179 (Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_4; en-us) AppleWebKit/533.18.1 (KHTML, like Gecko) Version/5.0.2 Safari/533.18.5) X-Barracuda-Connect: lo.gmane.org[80.91.229.12] X-Barracuda-Start-Time: 1292392209 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49470 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Paul E. McKenney linux.vnet.ibm.com> writes: > On Wed, Dec 15, 2010 at 10:00:47AM +1100, Dave Chinner wrote: > > On Tue, Dec 14, 2010 at 01:18:01PM -0800, Paul E. McKenney wrote: > > > On Mon, Dec 13, 2010 at 12:32:36PM +1100, Dave Chinner wrote: > > > > > > > > + /* > > > > + * check for re-use of an inode within an RCU grace period due to the > > > > + * radix tree nodes not being updated yet. We monitor for this by > > > > + * setting the inode number to zero before freeing the inode structure. > > > > + * If the inode has been reallocated and set up, then the inode number > > > > + * will not match, so check for that, too. > > > > + */ > > > > spin_lock(&ip->i_flags_lock); > > > > + if (ip->i_ino != ino) { > > > > + trace_xfs_iget_skip(ip); > > > > + XFS_STATS_INC(xs_ig_frecycle); > > > > + spin_unlock(&ip->i_flags_lock); > > > > + rcu_read_unlock(); > > > > + /* Expire the grace period so we don't trip over it again. */ > > > > + synchronize_rcu(); > > > > > > Hmmm... Interesting. Wouldn't the fact that we acquired the same lock > > > that was held after removing the inode guarantee that an immediate retry > > > would manage not to find this same inode again? > > > > That is what I'm not sure of. I was more worried about resolving the > > contents of the radix tree nodes, not so much the inode itself. If a > > new traversal will resolve the tree correctly (which is what you are > > implying), then synchronize_rcu() is not needed.... [...] > > > If this is not the case, then readers finding it again will not be > > > protected by the RCU grace period, right? > > > > > > In short, I don't understand why the synchronize_rcu() is needed. > > > If it is somehow helping, that sounds to me like it is covering up > > > a real bug that should be fixed separately. > > > > It isn't covering up a bug, it was more tryingt o be consistent with > > the rest of the xfs_inode lookup failures - we back off and try > > again later. If that is unnecessary resolve the RCU lookup race, > > then it can be dropped. The RCU radix tree should have the same type of causality semantics as, say, loading and storing a single word, if that helps think about it. So the favourite sequence: x = 1; smp_wmb(); y = 1; r2 = y; smp_rmb(); r1 = x; Then r2 == 1 implies r1 == 1. Ie. if we "see" something has happened on a CPU (from another CPU), then we will also see everything that has previously happened on that CPU (provided the correct barriers are there). radix_tree_delete(&tree, idx); smp_wmb(); y = 1; r2 = y; smp_rmb(); r1 = radix_tree_lookup(&tree, idx); So if we see r2 == 1, then r1 will be NULL. In this case, if you can observe something that has happened after the inode is removed from the tree (ie. i_ino has changed), then you should not find it in the tree after a subsequent lookup (no synchronize_rcu required, just appropriate locking or barriers). BTW. I wondered if you can also do the radix_tree tag lookup for reclaim under RCU? From paulmck@paulmck-ThinkPad-W500linux.vnet.ibm.com Wed Dec 15 00:32:47 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF6WkqF177346 for ; Wed, 15 Dec 2010 00:32:47 -0600 X-ASG-Debug-ID: 1292394878-1d3603810000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from e7.ny.us.ibm.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3A6671CC88FA for ; Tue, 14 Dec 2010 22:34:38 -0800 (PST) Received: from e7.ny.us.ibm.com (e7.ny.us.ibm.com [32.97.182.137]) by cuda.sgi.com with ESMTP id K5aMZRLJ3Rh0Q5ef for ; Tue, 14 Dec 2010 22:34:38 -0800 (PST) Received: from d01dlp02.pok.ibm.com (d01dlp02.pok.ibm.com [9.56.224.85]) by e7.ny.us.ibm.com (8.14.4/8.13.1) with ESMTP id oBF6GoQu019515 for ; Wed, 15 Dec 2010 01:16:50 -0500 Received: from d01relay05.pok.ibm.com (d01relay05.pok.ibm.com [9.56.227.237]) by d01dlp02.pok.ibm.com (Postfix) with ESMTP id 39CED4DE803E for ; Wed, 15 Dec 2010 01:32:32 -0500 (EST) Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay05.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id oBF6YbdY163328 for ; Wed, 15 Dec 2010 01:34:37 -0500 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id oBF6YbFk023568 for ; Wed, 15 Dec 2010 01:34:37 -0500 Received: from paulmck-ThinkPad-W500 (sig-9-65-65-137.mts.ibm.com [9.65.65.137]) by d01av04.pok.ibm.com (8.14.4/8.13.1/NCO v10.0 AVin) with ESMTP id oBF6YalE023532; Wed, 15 Dec 2010 01:34:36 -0500 Received: by paulmck-ThinkPad-W500 (Postfix, from userid 1000) id C85CB13F812; Tue, 14 Dec 2010 22:34:35 -0800 (PST) Date: Tue, 14 Dec 2010 22:34:35 -0800 From: "Paul E. McKenney" To: Dave Chinner Cc: xfs@oss.sgi.com, eric.dumazet@gmail.com X-ASG-Orig-Subj: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Subject: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Message-ID: <20101215063435.GB2217@linux.vnet.ibm.com> Reply-To: paulmck@linux.vnet.ibm.com References: <1292203957-15819-1-git-send-email-david@fromorbit.com> <1292203957-15819-3-git-send-email-david@fromorbit.com> <20101214211801.GH2161@linux.vnet.ibm.com> <20101214230047.GC16267@dastard> <20101215010536.GT2161@linux.vnet.ibm.com> <20101215025049.GE9925@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101215025049.GE9925@dastard> User-Agent: Mutt/1.5.20 (2009-06-14) X-Content-Scanned: Fidelis XPS MAILER X-Barracuda-Connect: e7.ny.us.ibm.com[32.97.182.137] X-Barracuda-Start-Time: 1292394879 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49473 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 15, 2010 at 01:50:49PM +1100, Dave Chinner wrote: > On Tue, Dec 14, 2010 at 05:05:36PM -0800, Paul E. McKenney wrote: > > On Wed, Dec 15, 2010 at 10:00:47AM +1100, Dave Chinner wrote: > > > On Tue, Dec 14, 2010 at 01:18:01PM -0800, Paul E. McKenney wrote: > > > > On Mon, Dec 13, 2010 at 12:32:36PM +1100, Dave Chinner wrote: > > > > > + /* > > > > > + * check for re-use of an inode within an RCU grace period due to the > > > > > + * radix tree nodes not being updated yet. We monitor for this by > > > > > + * setting the inode number to zero before freeing the inode structure. > > > > > + * If the inode has been reallocated and set up, then the inode number > > > > > + * will not match, so check for that, too. > > > > > + */ > > > > > spin_lock(&ip->i_flags_lock); > > > > > + if (ip->i_ino != ino) { > > > > > + trace_xfs_iget_skip(ip); > > > > > + XFS_STATS_INC(xs_ig_frecycle); > > > > > + spin_unlock(&ip->i_flags_lock); > > > > > + rcu_read_unlock(); > > > > > + /* Expire the grace period so we don't trip over it again. */ > > > > > + synchronize_rcu(); > > > > > > > > Hmmm... Interesting. Wouldn't the fact that we acquired the same lock > > > > that was held after removing the inode guarantee that an immediate retry > > > > would manage not to find this same inode again? > > > > > > That is what I'm not sure of. I was more worried about resolving the > > > contents of the radix tree nodes, not so much the inode itself. If a > > > new traversal will resolve the tree correctly (which is what you are > > > implying), then synchronize_rcu() is not needed.... > > > > Here is the sequence of events that I believe must be in place: > > s/vfs_inode/xfs_inode/g Good point! > > 1. Some CPU removes the vfs_inode from the radix tree, presumably > > while holding some lock whose identity does not matter here. > > Yes, the ->pag_ici_lock. OK. > > 2. Before invoking call_rcu() on a given vfs_inode, this same > > CPU clears the inode number while holding ->i_flags_lock. > > Not necessarily the same CPU - there are points where we take > sleeping locks for synchronisation with any remaining users, and > we don't use preempt_disable() to prevent a change of CPU on a > preemptible kernel. > > > If the CPU in #1 and #2 might be different, then either > > CPU #1 must hold ->i_flags_lock while removing the vfs_inode > > from the radix tree, or I don't understand how this can work > > even with the synchronize_rcu(). > > I'm probably missing something, but why does the CPU we run > call_rcu() to free the inode on matter w.r.t. which CPU it was > deleted from the radix tree on? I was oversimplifying. What matters is that the item was deleted from the radix tree unambiguously before it was passed to call_rcu(). There are a number of ways to make this happen: 1. Do the removal and the call_rcu() on the same CPU, in that order. 2. Do the removal while holding a given lock, and do the call_rcu() under a later critical section for that same lock. 3. Do the removal while holding lock A one CPU 1, then later acquire lock B on CPU 1, and then do the call_rcu() after a later acquisition of lock B on some other CPU. There are a bunch of other variations on this theme, but the key requirement is again that the call_rcu() happen unambiguously after the removal. Otherwise, how is the grace period supposed to guarantee that all RCU readers that might be accessing the removed xfs_inode really have completed? > There is this comment in include/linux/radix-tree.h: > > * It is still required that the caller manage the synchronization and lifetimes > * of the items. So if RCU lock-free lookups are used, typically this would mean > * that the items have their own locks, or are amenable to lock-free access; and > * that the items are freed by RCU (or only freed after having been deleted from > * the radix tree *and* a synchronize_rcu() grace period). > > There is nothing there that mentions the items need to be deleted on > the same CPU as they were removed from the radix tree or that the > item lock needs to be held when the item is removed from the tree. > AFAICT, the XFS code is following these guidelines. Well, the grace period (from either synchronize_rcu() or call_rcu()) does need to start unambiguously after the deletion from the radix tree. Should we upgrade the comment? > FWIW, this is where is got the idea of using synchronize_rcu() to > ensure a llokup retry wouldn't see the same freed inode. I'm > thinking that simply re-running the lookup will give the same > guarantee because of the memory barriers in the radix tree lookup > code... Maybe... But we do need to be sure, right? > > 3. Some CPU, possibly different than that in #1 and #2 above, > > executes the above code. If locking works correctly, it > > must see the earlier changes, so a subsequent access should > > see the results of #1 above, so that it won't see the element > > that was removed there. > > Isn't the item validity considered separately to the tree traversal > consistency? i.e. the item lock (i.e. ->i_flags_lock) provides a > safe item validity check via the unlock->lock memory barrier, whilst > the radix tree uses rcu_dereference() to provide memory barriers > against the modifications? But the safe validity check assumes that the RCU grace period starts unambiguously after the item has been removed. Violate that assumption, and all bets are off. > > That said, I don't claim to understand either vfs or xfs very well, so > > I would be arbitrarily deeply confused. > > We might both be confused ;) Sounds like the most likely possibility, now that you mention it. ;-) Thanx, Paul From SRS0+ffzZ+18+fromorbit.com=david@internode.on.net Wed Dec 15 00:33:45 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF6XjkZ177419 for ; Wed, 15 Dec 2010 00:33:45 -0600 X-ASG-Debug-ID: 1292394936-247802d50000-w1Z2WR X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 38A411CC890C for ; Tue, 14 Dec 2010 22:35:37 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id jYwr0BxLiPUek3GE for ; Tue, 14 Dec 2010 22:35:37 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49915167-1927428 for multiple; Wed, 15 Dec 2010 17:05:36 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PSkxa-0006SF-Fe; Wed, 15 Dec 2010 17:35:34 +1100 Date: Wed, 15 Dec 2010 17:35:34 +1100 From: Dave Chinner To: Nick Piggin Cc: linux-xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Subject: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Message-ID: <20101215063534.GF9925@dastard> References: <1292203957-15819-1-git-send-email-david@fromorbit.com> <1292203957-15819-3-git-send-email-david@fromorbit.com> <20101214211801.GH2161@linux.vnet.ibm.com> <20101214230047.GC16267@dastard> <20101215010536.GT2161@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292394938 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49473 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 15, 2010 at 03:30:43AM +0000, Nick Piggin wrote: > In this case, if you can observe something that has happened after the > inode is removed from the tree (ie. i_ino has changed), then you should > not find it in the tree after a subsequent lookup (no synchronize_rcu > required, just appropriate locking or barriers). Ok, that's what I thought was supposed to be the case. Thanks for confirming that, Nick. > BTW. I wondered if you can also do the radix_tree tag lookup for reclaim > under RCU? It's currently under the ->pag_ici_lock using a radix_tree_gang_lookup_tag, though I think this was a mismerge bug from an earlier version. I intended it to be under RCU as the "inode OK for reclaim" validation checks won't touch an inode that already has XFS_IRECLAIM already set (i.e. already under reclaim or freed), so the reliability of tag lookups is not a big deal. The lookup probably needs to check if XFS_IRECLAIMABLE is set (rather than asserting it is set) to avoid so as to only reclaim inodes that are really in the reclaimable state. Note that ->i_flags_lock controls all the state changes, so it should provide the necessary item memory barriers to ensure that only reclaimable inodes are found for reclaim. Cheers, Dave. -- Dave Chinner david@fromorbit.com From npiggin@kernel.dk Wed Dec 15 02:03:38 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBF83cAF182974 for ; Wed, 15 Dec 2010 02:03:38 -0600 X-ASG-Debug-ID: 1292400329-1915016e0000-w1Z2WR X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from ipmail07.adl2.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 036381CC8FBF for ; Wed, 15 Dec 2010 00:05:30 -0800 (PST) Received: from ipmail07.adl2.internode.on.net (ipmail07.adl2.internode.on.net [150.101.137.131]) by cuda.sgi.com with ESMTP id hl9NZe9x6DOYAbbL for ; Wed, 15 Dec 2010 00:05:30 -0800 (PST) X-IronPort-Anti-Spam-Filtered: true X-IronPort-Anti-Spam-Result: AvsEAJoDCE15Lc+z/2dsb2JhbACkI3TBMYVKBA Received: from ppp121-45-207-179.lns20.cbr1.internode.on.net (HELO laptop.local0.net) ([121.45.207.179]) by ipmail07.adl2.internode.on.net with ESMTP; 15 Dec 2010 18:35:28 +1030 Received: by laptop.local0.net (Postfix, from userid 1000) id 6D3CB2981A; Wed, 15 Dec 2010 19:05:25 +1100 (EST) Date: Wed, 15 Dec 2010 19:05:25 +1100 From: Nick Piggin To: Dave Chinner Cc: Nick Piggin , linux-xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Subject: Re: [PATCH 2/3] xfs: convert inode cache lookups to use RCU locking Message-ID: <20101215080525.GA4199@amd> References: <1292203957-15819-1-git-send-email-david@fromorbit.com> <1292203957-15819-3-git-send-email-david@fromorbit.com> <20101214211801.GH2161@linux.vnet.ibm.com> <20101214230047.GC16267@dastard> <20101215010536.GT2161@linux.vnet.ibm.com> <20101215063534.GF9925@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101215063534.GF9925@dastard> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: ipmail07.adl2.internode.on.net[150.101.137.131] X-Barracuda-Start-Time: 1292400331 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49479 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 15, 2010 at 05:35:34PM +1100, Dave Chinner wrote: > On Wed, Dec 15, 2010 at 03:30:43AM +0000, Nick Piggin wrote: > > In this case, if you can observe something that has happened after the > > inode is removed from the tree (ie. i_ino has changed), then you should > > not find it in the tree after a subsequent lookup (no synchronize_rcu > > required, just appropriate locking or barriers). > > Ok, that's what I thought was supposed to be the case. Thanks > for confirming that, Nick. > > > BTW. I wondered if you can also do the radix_tree tag lookup for reclaim > > under RCU? > > It's currently under the ->pag_ici_lock using a > radix_tree_gang_lookup_tag, though I think this was a mismerge bug > from an earlier version. > > I intended it to be under RCU as the "inode OK for reclaim" > validation checks won't touch an inode that already has XFS_IRECLAIM > already set (i.e. already under reclaim or freed), so the > reliability of tag lookups is not a big deal. That would be nice, a while back I was seeing lock contention in reclaim there, and tried some hacks to improve it, but this should solve it properly. The tag lookups should be reliable too -- we use them in pagecache dirty writeout. Basically same causality rules: if we observe (given the required barriers or locks) an event we know to have happened after the tag was set and before it is cleared, then the tag lookup should find the item. > The lookup probably needs to check if XFS_IRECLAIMABLE is set > (rather than asserting it is set) to avoid so as to only reclaim > inodes that are really in the reclaimable state. Note that > ->i_flags_lock controls all the state changes, so it should provide > the necessary item memory barriers to ensure that only reclaimable > inodes are found for reclaim. If you are checking and clearing those flags under lock, then I think everything will be fine. lock() set deleted flag unlock() delete from radix tree versus look up from radix tree lock() check deleted flag... Then at this point we would know that if the deleted flag is not set, then the item can not have been deleted from the radix tree by the 1st sequence. The stores that delete the item from the radix tree may be visible before the deleted flag is visible (due to release-barrier ordering), but that's not a problem here. Thanks, Nick From BATV+dac281eab5e50afe0418+2670+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 15 06:06:52 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBFC6otT199050 for ; Wed, 15 Dec 2010 06:06:52 -0600 X-ASG-Debug-ID: 1292414923-73a701610000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9A41E1CCCCC0 for ; Wed, 15 Dec 2010 04:08:43 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id LQ13HFLELeItFaFh for ; Wed, 15 Dec 2010 04:08:43 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PSq9w-0007jD-94; Wed, 15 Dec 2010 12:08:40 +0000 Date: Wed, 15 Dec 2010 07:08:40 -0500 From: Christoph Hellwig To: "Zhong, Xin" Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH v3] xfstests: pwrite hang when writing from mmaped buffer of the same page Subject: Re: [PATCH v3] xfstests: pwrite hang when writing from mmaped buffer of the same page Message-ID: <20101215120840.GA29650@infradead.org> References: <1292304018-10827-1-git-send-email-xin.zhong@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292304018-10827-1-git-send-email-xin.zhong@intel.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292414923 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 14, 2010 at 01:20:18PM +0800, Zhong, Xin wrote: > The problem is found in meego testing on btrfs: > http://bugs.meego.com/show_bug.cgi?id=6672 > > Reviewed-by: Hellwig, Christoph and Chinner, Dave > Signed-off-by: Zhong, Xin Thanks, the new patch looks good. I'll fix up the rewiewed-by line to be two separate ones, and move the variable declarations to the top of the main functions as pointed out by Dave and will commit it. From BATV+dac281eab5e50afe0418+2670+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 15 06:16:20 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBFCGJGr199734 for ; Wed, 15 Dec 2010 06:16:19 -0600 X-ASG-Debug-ID: 1292415493-730e02530000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 57F7C1CCCD81 for ; Wed, 15 Dec 2010 04:18:13 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id R9gnQE60hZ3ufD8U for ; Wed, 15 Dec 2010 04:18:13 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PSqJ9-0000pw-5x; Wed, 15 Dec 2010 12:18:11 +0000 Date: Wed, 15 Dec 2010 07:18:11 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH] xfs: provide a inode iolock lockdep class Subject: Re: [PATCH] xfs: provide a inode iolock lockdep class Message-ID: <20101215121811.GA3122@infradead.org> References: <1292202431-15320-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292202431-15320-1-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292415493 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 12:07:11PM +1100, Dave Chinner wrote: > From: Dave Chinner > > The XFS iolock needs to be re-initialised to a new lock class before > it enters reclaim to prevent lockdep false positives. Unfortunately, > this is not sufficient protection as inodes in the XFS_IRECLAIMABLE > state can be recycled and not re-initialised before being reused. > > We need to re-initialise the lock state when transfering out of > XFS_IRECLAIMABLE state to XFS_INEW, but we need to keep the same > class as if the inode was just allocated. Hence we need a specific > lockdep class variable for the iolock so that both initialisations > use the same class. > > While there, add a specific class for inodes in the reclaim state so > that it is easy to tell from lockdep reports what state the inode > was in that generated the report. Looks good to me. As long as we have the mrlock abstraction we might as well hide this behind it, but as I plan on killing the abstraction that's probably not worth the effort. Reviewed-by: Christoph Hellwig From branto@redhat.com Wed Dec 15 09:05:41 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBFF5fHr211493 for ; Wed, 15 Dec 2010 09:05:41 -0600 X-ASG-Debug-ID: 1292425654-06eb02f00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 262981CCD204 for ; Wed, 15 Dec 2010 07:07:34 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id Cp3BPprD7CCX620o for ; Wed, 15 Dec 2010 07:07:34 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oBFF7VK3022704 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Wed, 15 Dec 2010 10:07:31 -0500 Received: from [10.34.26.208] (dhcp-26-208.brq.redhat.com [10.34.26.208]) by int-mx12.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id oBFF5dW4013811 for ; Wed, 15 Dec 2010 10:05:39 -0500 X-ASG-Orig-Subj: xfstests: filter spaces in xfs_quota output in test case 108 Subject: xfstests: filter spaces in xfs_quota output in test case 108 From: Boris Ranto To: xfs Content-Type: text/plain; charset="UTF-8" Date: Wed, 15 Dec 2010 16:05:38 +0100 Message-ID: <1292425538.3220.14.camel@dhcp-31-190.brq.redhat.com> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.68 on 10.5.11.25 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1292425655 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Program xfs_quota can output different amounts of spaces when it is trying to align its output. This can cause output mismatch on several systems when testing test case 108. Attached patch will filter all the consecutive spaces in xfs_quota output to just one space making the test case independent of the alignment. Signed-off-by: Boris Ranto diff -urpN a/xfstests/108 b/xfstests/108 --- a/xfstests/108 2010-12-09 11:34:37.733245986 +0100 +++ b/xfstests/108 2010-12-14 14:50:16.813494309 +0100 @@ -72,9 +72,9 @@ test_accounting() for file in $SCRATCH_MNT/{buffer,direct,mmap}; do $here/src/lstat64 $file | head -3 | _filter_scratch done - xfs_quota -c "quota -hnb -$type $id" $QARGS | _filter_scratch - xfs_quota -c "quota -hni -$type $id" $QARGS | _filter_scratch - xfs_quota -c "quota -hnr -$type $id" $QARGS | _filter_scratch + xfs_quota -c "quota -hnb -$type $id" $QARGS | _filter_scratch | _filter_spaces + xfs_quota -c "quota -hni -$type $id" $QARGS | _filter_scratch | _filter_spaces + xfs_quota -c "quota -hnr -$type $id" $QARGS | _filter_scratch | _filter_spaces } export MOUNT_OPTIONS="-opquota" diff -urpN a/xfstests/108.out b/xfstests/108.out --- a/xfstests/108.out 2010-12-09 11:24:48.973251551 +0100 +++ b/xfstests/108.out 2010-12-14 15:01:33.640484268 +0100 @@ -32,11 +32,11 @@ projid = 3 Size: 16777216 Filetype: Regular File Mode: (0600/-rw-------) Uid: (1) Gid: (2) Disk quotas for User #1 (1) -Filesystem Blocks Quota Limit Warn/Time Mounted on -SCRATCH_DEV 48M 0 0 00 [------] SCRATCH_MNT +Filesystem Blocks Quota Limit Warn/Time Mounted on +SCRATCH_DEV 48M 0 0 00 [------] SCRATCH_MNT Disk quotas for User #1 (1) -Filesystem Files Quota Limit Warn/Time Mounted on -SCRATCH_DEV 3 0 0 00 [------] SCRATCH_MNT +Filesystem Files Quota Limit Warn/Time Mounted on +SCRATCH_DEV 3 0 0 00 [------] SCRATCH_MNT ### test group accounting @@ -64,11 +64,11 @@ projid = 3 Size: 16777216 Filetype: Regular File Mode: (0600/-rw-------) Uid: (1) Gid: (2) Disk quotas for Group #2 (2) -Filesystem Blocks Quota Limit Warn/Time Mounted on -SCRATCH_DEV 48M 0 0 00 [------] SCRATCH_MNT +Filesystem Blocks Quota Limit Warn/Time Mounted on +SCRATCH_DEV 48M 0 0 00 [------] SCRATCH_MNT Disk quotas for Group #2 (2) -Filesystem Files Quota Limit Warn/Time Mounted on -SCRATCH_DEV 3 0 0 00 [------] SCRATCH_MNT +Filesystem Files Quota Limit Warn/Time Mounted on +SCRATCH_DEV 3 0 0 00 [------] SCRATCH_MNT ### create files, setting up ownership (type=p) File: "SCRATCH_MNT/buffer" @@ -94,8 +94,8 @@ projid = 3 Size: 16777216 Filetype: Regular File Mode: (0600/-rw-------) Uid: (1) Gid: (2) Disk quotas for Project #3 (3) -Filesystem Blocks Quota Limit Warn/Time Mounted on -SCRATCH_DEV 48M 0 0 00 [------] SCRATCH_MNT +Filesystem Blocks Quota Limit Warn/Time Mounted on +SCRATCH_DEV 48M 0 0 00 [------] SCRATCH_MNT Disk quotas for Project #3 (3) -Filesystem Files Quota Limit Warn/Time Mounted on -SCRATCH_DEV 3 0 0 00 [------] SCRATCH_MNT +Filesystem Files Quota Limit Warn/Time Mounted on +SCRATCH_DEV 3 0 0 00 [------] SCRATCH_MNT diff -urpN a/xfstests/common.filter b/xfstests/common.filter --- a/xfstests/common.filter 2010-12-09 11:24:44.315240233 +0100 +++ b/xfstests/common.filter 2010-12-14 14:45:53.566228712 +0100 @@ -224,5 +224,10 @@ _filter_scratch() sed -e "s,$SCRATCH_DEV,SCRATCH_DEV,g" -e "s,$SCRATCH_MNT,SCRATCH_MNT,g" } +_filter_spaces() +{ + sed -e 's/ [ ]*/ /g' +} + # make sure this script returns success /bin/true From SZak@nds.com Wed Dec 15 09:36:45 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: *** X-Spam-Status: No, score=3.8 required=5.0 tests=BAYES_50,HTML_MESSAGE autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBFFajZc213630 for ; Wed, 15 Dec 2010 09:36:45 -0600 X-ASG-Debug-ID: 1292427516-626c035d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from ilsmtp.nds.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1F0D41F35CC for ; Wed, 15 Dec 2010 07:38:37 -0800 (PST) Received: from ilsmtp.nds.com (ilsmtp.nds.com [192.118.32.12]) by cuda.sgi.com with ESMTP id fXVZwqQ3bu966lBA for ; Wed, 15 Dec 2010 07:38:37 -0800 (PST) From: "Zak, Semion" To: "xfs@oss.sgi.com" CC: XTV FS Group Date: Wed, 15 Dec 2010 17:39:03 +0200 X-ASG-Orig-Subj: XFS in LINUX embedded environment Subject: XFS in LINUX embedded environment Thread-Topic: XFS in LINUX embedded environment Thread-Index: AcucbjKFOfu2hNPnQMKpWG/dmqVFtQ== Message-ID: <6385EF5E30011E42B75895D851412B2A64BB14EFEA@ILMA1.IL.NDS.COM> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/alternative; boundary="_000_6385EF5E30011E42B75895D851412B2A64BB14EFEAILMA1ILNDSCOM_" MIME-Version: 1.0 X-Barracuda-Connect: ilsmtp.nds.com[192.118.32.12] X-Barracuda-Start-Time: 1292427518 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.73 X-Barracuda-Spam-Status: No, SCORE=-0.73 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=HTML_MESSAGE, MISSING_SUBJECT, MISSING_SUBJECT_2, NO_RECEIVED, TO_CC_NONE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49509 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 HTML_MESSAGE BODY: HTML included in message 0.01 MISSING_SUBJECT Missing Subject: header 0.00 TO_CC_NONE No To: or Cc: header -0.00 NO_RECEIVED Informational: message has no Received headers 1.28 MISSING_SUBJECT_2 Missing Subject: header X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --_000_6385EF5E30011E42B75895D851412B2A64BB14EFEAILMA1ILNDSCOM_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Hi, I try to use XFS in LINUX embedded environment, without virtual memory. In one of the tests I got "Out of memory" error. My question is: Is it possible to bound or decrease memory use by XFS? Thanks, Semion. ________________________________ This message is confidential and intended only for the addressee. If you ha= ve received this message in error, please immediately notify the postmaster= @nds.com and delete it from your system as well as any copies. The content = of e-mails as well as traffic data may be monitored by NDS for employment a= nd security purposes. To protect the environment please do not print this e-mail unless necessary= . An NDS Group Limited company. www.nds.com --_000_6385EF5E30011E42B75895D851412B2A64BB14EFEAILMA1ILNDSCOM_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Hi,

I try to use XFS in LINUX embedded environment, with= out virtual memory.

In one of the tests I got “Out of memory”= ; error.

My question is:

 

Is it possible to bound or decrease memory use by XF= S?

 

 

Thanks,

 

Semion.


This message is confidential= and intended only for the addressee. If you have received this message in = error, please immediately notify the postmaster@nds.com and delete it from = your system as well as any copies. The content of e-mails as well as traffic data may be monitored by NDS for emp= loyment and security purposes.
To protect the environment please do not print this e-mail unless necessary= .

An NDS Group Limited company. www.nds.com
 --_000_6385EF5E30011E42B75895D851412B2A64BB14EFEAILMA1ILNDSCOM_-- From BATV+dac281eab5e50afe0418+2670+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 15 12:55:41 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBFItew4228957 for ; Wed, 15 Dec 2010 12:55:41 -0600 X-ASG-Debug-ID: 1292439453-4b0a00320000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 829231F5092 for ; Wed, 15 Dec 2010 10:57:34 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id ZhTKZfFnde5fCdD8 for ; Wed, 15 Dec 2010 10:57:34 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PSwXc-0002qV-A9; Wed, 15 Dec 2010 18:57:32 +0000 Date: Wed, 15 Dec 2010 13:57:32 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 1/2] xfs: dynamic speculative EOF preallocation Subject: Re: [PATCH 1/2] xfs: dynamic speculative EOF preallocation Message-ID: <20101215185732.GA10826@infradead.org> References: <1292203511-15685-1-git-send-email-david@fromorbit.com> <1292203511-15685-2-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292203511-15685-2-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292439454 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean With this patch my 32-bit x86 VM hangs when running test 014, although I can interrupt it. With the full patchset applied I get softlockup warnings in this test for xfsaild, which seems related. Also test 012 fails, but that might be intentional (?). From SRS0+YXM++18+fromorbit.com=david@internode.on.net Wed Dec 15 16:55:22 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBFMtLSE246673 for ; Wed, 15 Dec 2010 16:55:22 -0600 X-ASG-Debug-ID: 1292453833-736a03950000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 11AE31F5F76 for ; Wed, 15 Dec 2010 14:57:13 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id wz319DeiaLh27TTF for ; Wed, 15 Dec 2010 14:57:13 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49838529-1927428 for multiple; Thu, 16 Dec 2010 09:27:12 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PT0HW-0007oy-MR; Thu, 16 Dec 2010 09:57:10 +1100 Date: Thu, 16 Dec 2010 09:57:10 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH] xfs: provide a inode iolock lockdep class Subject: Re: [PATCH] xfs: provide a inode iolock lockdep class Message-ID: <20101215225710.GG9925@dastard> References: <1292202431-15320-1-git-send-email-david@fromorbit.com> <20101215121811.GA3122@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101215121811.GA3122@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1292453835 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49539 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 15, 2010 at 07:18:11AM -0500, Christoph Hellwig wrote: > On Mon, Dec 13, 2010 at 12:07:11PM +1100, Dave Chinner wrote: > > From: Dave Chinner > > > > The XFS iolock needs to be re-initialised to a new lock class before > > it enters reclaim to prevent lockdep false positives. Unfortunately, > > this is not sufficient protection as inodes in the XFS_IRECLAIMABLE > > state can be recycled and not re-initialised before being reused. > > > > We need to re-initialise the lock state when transfering out of > > XFS_IRECLAIMABLE state to XFS_INEW, but we need to keep the same > > class as if the inode was just allocated. Hence we need a specific > > lockdep class variable for the iolock so that both initialisations > > use the same class. > > > > While there, add a specific class for inodes in the reclaim state so > > that it is easy to tell from lockdep reports what state the inode > > was in that generated the report. > > Looks good to me. As long as we have the mrlock abstraction we might as > well hide this behind it, but as I plan on killing the abstraction > that's probably not worth the effort. I thought about doing that, too, after looking at what the abstraction still provides us with. I think it only provides an extra "is write locked" debug check which I think could be added to the generic rwsem code pretty easily. But I've got a big enough patch stack out for review right now. ;) > Reviewed-by: Christoph Hellwig Thanks, I'll add it to the for-2.6.38 stack. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+T1S8+18+fromorbit.com=david@internode.on.net Wed Dec 15 16:57:02 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBFMv2hH246821 for ; Wed, 15 Dec 2010 16:57:02 -0600 X-ASG-Debug-ID: 1292453933-0b4f034b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 6D0311458CC4 for ; Wed, 15 Dec 2010 14:58:53 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id a3mKKyJ6Tq4CbqdE for ; Wed, 15 Dec 2010 14:58:53 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 4793310-1927428 for multiple; Thu, 16 Dec 2010 09:28:52 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PT0J8-0007pQ-SZ; Thu, 16 Dec 2010 09:58:50 +1100 Date: Thu, 16 Dec 2010 09:58:50 +1100 From: Dave Chinner To: "Zhong, Xin" Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH v3] xfstests: pwrite hang when writing from mmaped buffer of the same page Subject: Re: [PATCH v3] xfstests: pwrite hang when writing from mmaped buffer of the same page Message-ID: <20101215225850.GH9925@dastard> References: <1292304018-10827-1-git-send-email-xin.zhong@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292304018-10827-1-git-send-email-xin.zhong@intel.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292453935 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0209 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49538 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 14, 2010 at 01:20:18PM +0800, Zhong, Xin wrote: > The problem is found in meego testing on btrfs: > http://bugs.meego.com/show_bug.cgi?id=6672 > > Reviewed-by: Hellwig, Christoph and Chinner, Dave > Signed-off-by: Zhong, Xin > --- > 248 | 57 ++++++++++++++++++++++++++++++++++++ > 248.out | 2 + > group | 1 + > src/Makefile | 2 +- > src/pwrite_mmap_blocked.c | 71 +++++++++++++++++++++++++++++++++++++++++++++ > 5 files changed, 132 insertions(+), 1 deletions(-) > create mode 100644 248 > create mode 100644 248.out > create mode 100644 src/pwrite_mmap_blocked.c > > diff --git a/248 b/248 > new file mode 100644 > index 0000000..ea4313f > --- /dev/null > +++ b/248 > @@ -0,0 +1,57 @@ > +#! /bin/bash > +# FS QA Test No. 248 > +# > +# Test for pwrite hang problem when writing from mmaped buffer of the same page > +# > +#----------------------------------------------------------------------- > +# Copyright (c) 2010 YOUR NAME HERE. All Rights Reserved. Still needs the copyright line updated. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+pYTf+18+fromorbit.com=david@internode.on.net Wed Dec 15 17:02:48 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBFN2llX247140 for ; Wed, 15 Dec 2010 17:02:47 -0600 X-ASG-Debug-ID: 1292454279-736e03c90000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 5296A1F5FD6 for ; Wed, 15 Dec 2010 15:04:39 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id fF72Po2IrNzDEDJV for ; Wed, 15 Dec 2010 15:04:39 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49481074-1927428 for multiple; Thu, 16 Dec 2010 09:34:32 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PT0OT-0007q5-4t; Thu, 16 Dec 2010 10:04:21 +1100 Date: Thu, 16 Dec 2010 10:04:21 +1100 From: Dave Chinner To: "Zak, Semion" Cc: "xfs@oss.sgi.com" , XTV FS Group X-ASG-Orig-Subj: Re: XFS in LINUX embedded environment Subject: Re: XFS in LINUX embedded environment Message-ID: <20101215230421.GI9925@dastard> References: <6385EF5E30011E42B75895D851412B2A64BB14EFEA@ILMA1.IL.NDS.COM> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <6385EF5E30011E42B75895D851412B2A64BB14EFEA@ILMA1.IL.NDS.COM> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292454281 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0208 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49539 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 15, 2010 at 05:39:03PM +0200, Zak, Semion wrote: > Hi, > I try to use XFS in LINUX embedded environment, without virtual memory. Can you describe your platform and environment for us? Does "without virtual memory" mean you are using a uclinux variant? Or does it mean you are simply not using any swap? > In one of the tests I got "Out of memory" error. Can you provide the test case and details of the OOM error? > My question is: > > Is it possible to bound or decrease memory use by XFS? Not directly - same as every other linux filesystem. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+T1S8+18+fromorbit.com=david@internode.on.net Wed Dec 15 17:24:18 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBFNOHOR248557 for ; Wed, 15 Dec 2010 17:24:18 -0600 X-ASG-Debug-ID: 1292455569-0b3103a70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 12466152DF0A for ; Wed, 15 Dec 2010 15:26:09 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id GIxDvKT9rO7TpVGY for ; Wed, 15 Dec 2010 15:26:09 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 4797446-1927428 for multiple; Thu, 16 Dec 2010 09:56:08 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PT0jX-0007sH-39; Thu, 16 Dec 2010 10:26:07 +1100 Date: Thu, 16 Dec 2010 10:26:07 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 00/10] writeback updates V2 Subject: Re: [PATCH 00/10] writeback updates V2 Message-ID: <20101215232606.GJ9925@dastard> References: <20101210084215.259628825@bombadil.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101210084215.259628825@bombadil.infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292455571 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0022 1.0000 -2.0066 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.01 X-Barracuda-Spam-Status: No, SCORE=-2.01 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49540 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, Dec 10, 2010 at 03:42:15AM -0500, Christoph Hellwig wrote: > - add IO_DIRECT per Dave's review comment > - fix up a commit message as per Dave's review comment > - add Reviewed-by: tags for Dave's reviews Christoph, do you want me to add this to my xfs-for-2.6.38 branch so it is easier to test with all the other pending changes we have for 2.6.38? Cheers, Dave. -- Dave Chinner david@fromorbit.com From xin.zhong@intel.com Wed Dec 15 19:47:47 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBG1llvu254526 for ; Wed, 15 Dec 2010 19:47:47 -0600 X-ASG-Debug-ID: 1292464180-1de200aa0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mga14.intel.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CFCBF1F670C for ; Wed, 15 Dec 2010 17:49:40 -0800 (PST) Received: from mga14.intel.com (mga14.intel.com [143.182.124.37]) by cuda.sgi.com with ESMTP id oNvsqpEQBuwEp2VB for ; Wed, 15 Dec 2010 17:49:40 -0800 (PST) Received: from azsmga001.ch.intel.com ([10.2.17.19]) by azsmga102.ch.intel.com with ESMTP; 15 Dec 2010 17:49:39 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.59,352,1288594800"; d="scan'208";a="362363751" Received: from pgsmsx602.gar.corp.intel.com ([10.221.43.81]) by azsmga001.ch.intel.com with ESMTP; 15 Dec 2010 17:49:38 -0800 Received: from pgsmsx509.gar.corp.intel.com (172.30.13.17) by pgsmsx602.gar.corp.intel.com (10.221.43.81) with Microsoft SMTP Server (TLS) id 8.2.254.0; Thu, 16 Dec 2010 09:48:40 +0800 Received: from shsmsx601.ccr.corp.intel.com (10.239.4.112) by PGSMSX509.gar.corp.intel.com (172.30.13.17) with Microsoft SMTP Server (TLS) id 8.2.254.0; Thu, 16 Dec 2010 09:48:38 +0800 Received: from shsmsx502.ccr.corp.intel.com ([10.239.4.96]) by shsmsx601.ccr.corp.intel.com ([10.239.4.112]) with mapi; Thu, 16 Dec 2010 09:48:29 +0800 From: "Zhong, Xin" To: Christoph Hellwig CC: "xfs@oss.sgi.com" Date: Thu, 16 Dec 2010 09:48:29 +0800 X-ASG-Orig-Subj: RE: [PATCH v3] xfstests: pwrite hang when writing from mmaped buffer of the same page Subject: RE: [PATCH v3] xfstests: pwrite hang when writing from mmaped buffer of the same page Thread-Topic: [PATCH v3] xfstests: pwrite hang when writing from mmaped buffer of the same page Thread-Index: AcucUNXqbnCOTXXARre661hBt8bZ9wAcmvCg Message-ID: <1865303E0DED764181A9D882DEF65FB6859A064AFE@shsmsx502.ccr.corp.intel.com> References: <1292304018-10827-1-git-send-email-xin.zhong@intel.com> <20101215120840.GA29650@infradead.org> In-Reply-To: <20101215120840.GA29650@infradead.org> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Barracuda-Connect: mga14.intel.com[143.182.124.37] X-Barracuda-Start-Time: 1292464180 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49549 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Thanks a lot for your help! -----Original Message----- From: Christoph Hellwig [mailto:hch@infradead.org]=20 Sent: Wednesday, December 15, 2010 8:09 PM To: Zhong, Xin Cc: xfs@oss.sgi.com Subject: Re: [PATCH v3] xfstests: pwrite hang when writing from mmaped buff= er of the same page On Tue, Dec 14, 2010 at 01:20:18PM +0800, Zhong, Xin wrote: > The problem is found in meego testing on btrfs: > http://bugs.meego.com/show_bug.cgi?id=3D6672 >=20 > Reviewed-by: Hellwig, Christoph and Chinner, Dave > Signed-off-by: Zhong, Xin Thanks, the new patch looks good. I'll fix up the rewiewed-by line to be two separate ones, and move the variable declarations to the top of the main functions as pointed out by Dave and will commit it. From xin.zhong@intel.com Wed Dec 15 20:21:34 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBG2LXhJ256552 for ; Wed, 15 Dec 2010 20:21:34 -0600 X-ASG-Debug-ID: 1292466206-4f3101540000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mga11.intel.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DF01B14594BC for ; Wed, 15 Dec 2010 18:23:26 -0800 (PST) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by cuda.sgi.com with ESMTP id N3fbsuMRbvZPGmU7 for ; Wed, 15 Dec 2010 18:23:26 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 15 Dec 2010 18:23:26 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.59,352,1288594800"; d="scan'208";a="636820982" Received: from pgsmsx602.gar.corp.intel.com ([10.221.43.81]) by fmsmga002.fm.intel.com with ESMTP; 15 Dec 2010 18:23:25 -0800 Received: from pgsmsx509.gar.corp.intel.com (172.30.13.17) by pgsmsx602.gar.corp.intel.com (10.221.43.81) with Microsoft SMTP Server (TLS) id 8.2.254.0; Thu, 16 Dec 2010 10:22:40 +0800 Received: from shsmsx601.ccr.corp.intel.com (10.239.4.112) by PGSMSX509.gar.corp.intel.com (172.30.13.17) with Microsoft SMTP Server (TLS) id 8.2.254.0; Thu, 16 Dec 2010 10:22:40 +0800 Received: from shsmsx502.ccr.corp.intel.com ([10.239.4.96]) by shsmsx601.ccr.corp.intel.com ([10.239.4.112]) with mapi; Thu, 16 Dec 2010 10:22:39 +0800 From: "Zhong, Xin" To: Dave Chinner CC: "xfs@oss.sgi.com" Date: Thu, 16 Dec 2010 10:22:38 +0800 X-ASG-Orig-Subj: RE: [PATCH v3] xfstests: pwrite hang when writing from mmaped buffer of the same page Subject: RE: [PATCH v3] xfstests: pwrite hang when writing from mmaped buffer of the same page Thread-Topic: [PATCH v3] xfstests: pwrite hang when writing from mmaped buffer of the same page Thread-Index: Acucq6rsRhS8L/3RSfeW9O81lzZEWwAHGEHQ Message-ID: <1865303E0DED764181A9D882DEF65FB6859A064B54@shsmsx502.ccr.corp.intel.com> References: <1292304018-10827-1-git-send-email-xin.zhong@intel.com> <20101215225850.GH9925@dastard> In-Reply-To: <20101215225850.GH9925@dastard> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Barracuda-Connect: mga11.intel.com[192.55.52.93] X-Barracuda-Start-Time: 1292466207 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean I will submit another one. Thanks a lot for your careful review,:-). -----Original Message----- From: Dave Chinner [mailto:david@fromorbit.com]=20 Sent: Thursday, December 16, 2010 6:59 AM To: Zhong, Xin Cc: xfs@oss.sgi.com Subject: Re: [PATCH v3] xfstests: pwrite hang when writing from mmaped buff= er of the same page On Tue, Dec 14, 2010 at 01:20:18PM +0800, Zhong, Xin wrote: > The problem is found in meego testing on btrfs: > http://bugs.meego.com/show_bug.cgi?id=3D6672 >=20 > Reviewed-by: Hellwig, Christoph and Chinner, Dave > Signed-off-by: Zhong, Xin > --- > 248 | 57 ++++++++++++++++++++++++++++++++++++ > 248.out | 2 + > group | 1 + > src/Makefile | 2 +- > src/pwrite_mmap_blocked.c | 71 +++++++++++++++++++++++++++++++++++++++= ++++++ > 5 files changed, 132 insertions(+), 1 deletions(-) > create mode 100644 248 > create mode 100644 248.out > create mode 100644 src/pwrite_mmap_blocked.c >=20 > diff --git a/248 b/248 > new file mode 100644 > index 0000000..ea4313f > --- /dev/null > +++ b/248 > @@ -0,0 +1,57 @@ > +#! /bin/bash > +# FS QA Test No. 248 > +# > +# Test for pwrite hang problem when writing from mmaped buffer of the sa= me page=20 > +# > +#----------------------------------------------------------------------- > +# Copyright (c) 2010 YOUR NAME HERE. All Rights Reserved. Still needs the copyright line updated. Cheers, Dave. --=20 Dave Chinner david@fromorbit.com From xin.zhong@intel.com Wed Dec 15 20:28:07 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_43, J_CHICKENPOX_62 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBG2S6mb256948 for ; Wed, 15 Dec 2010 20:28:07 -0600 X-ASG-Debug-ID: 1292466599-3b6502f80000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mga11.intel.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D14061CD0819 for ; Wed, 15 Dec 2010 18:29:59 -0800 (PST) Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) by cuda.sgi.com with ESMTP id BuijKB487HIRRteV for ; Wed, 15 Dec 2010 18:29:59 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP; 15 Dec 2010 18:29:56 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.59,352,1288594800"; d="scan'208";a="636822713" Received: from zyh-fedora.bj.intel.com (HELO localhost.localdomain) ([10.238.135.222]) by fmsmga002.fm.intel.com with ESMTP; 15 Dec 2010 18:29:56 -0800 From: "Zhong, Xin" To: xfs@oss.sgi.com Cc: xin.zhong@intel.com X-ASG-Orig-Subj: [PATCH v4] xfstests: pwrite hang when writing from mmaped buffer of the same page Subject: [PATCH v4] xfstests: pwrite hang when writing from mmaped buffer of the same page Date: Thu, 16 Dec 2010 10:30:52 +0800 Message-Id: <1292466652-15563-1-git-send-email-xin.zhong@intel.com> X-Mailer: git-send-email 1.6.2.2 X-Barracuda-Connect: mga11.intel.com[192.55.52.93] X-Barracuda-Start-Time: 1292466600 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean The problem is found in meego testing on btrfs: http://bugs.meego.com/show_bug.cgi?id=6672 Reviewed-by: Hellwig, Christoph Reviewed-by: Chinner, Dave Signed-off-by: Zhong, Xin --- 248 | 58 +++++++++++++++++++++++++++++++++++ 248.out | 2 + group | 1 + src/Makefile | 2 +- src/pwrite_mmap_blocked.c | 73 +++++++++++++++++++++++++++++++++++++++++++++ 5 files changed, 135 insertions(+), 1 deletions(-) create mode 100644 248 create mode 100644 248.out create mode 100644 src/pwrite_mmap_blocked.c diff --git a/248 b/248 new file mode 100644 index 0000000..38eb442 --- /dev/null +++ b/248 @@ -0,0 +1,58 @@ +#! /bin/bash +# FS QA Test No. 248 +# +# Test for pwrite hang problem when writing from mmaped buffer of the same page +# +#----------------------------------------------------------------------- +# Copyright (c) 2010 Intel Corporation +# +# This program is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by the Free +# Software Foundation; version 2 of the License +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +# for more details. +# +# You should have received a copy of the GNU General Public License along +# with this program; if not, write to the Free Software Foundation, Inc., 59 +# Temple Place - Suite 330, Boston, MA 02111-1307, USA. +# +#----------------------------------------------------------------------- +# +# creator +owner=xin.zhong@intel.com + +seq=`basename $0` +echo "QA output created by $seq" + +here=`pwd` +tmp=/tmp/$$ +status=1 # failure is the default! +trap "_cleanup; exit \$status" 0 1 2 3 15 + +_cleanup() +{ + cd / + rm -f $tmp.* $TESTFILE +} + +# get standard environment, filters and checks +. ./common.rc +. ./common.filter + +# real QA test starts here + +# Modify as appropriate. +_supported_fs generic +_supported_os Linux + +TESTFILE=$TEST_DIR/test_file +TEST_PROG=$here/src/pwrite_mmap_blocked + +$TEST_PROG $TESTFILE + +# success, all done +status=0 +exit diff --git a/248.out b/248.out new file mode 100644 index 0000000..d02c1ac --- /dev/null +++ b/248.out @@ -0,0 +1,2 @@ +QA output created by 248 +pwrite 1 bytes from 2 to 3 diff --git a/group b/group index 0f94dd9..a40c98f 100644 --- a/group +++ b/group @@ -361,3 +361,4 @@ deprecated 245 auto quick dir 246 auto quick rw 247 auto quick rw +248 auto quick rw diff --git a/src/Makefile b/src/Makefile index b827bd0..47d7334 100644 --- a/src/Makefile +++ b/src/Makefile @@ -17,7 +17,7 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \ locktest unwritten_mmap bulkstat_unlink_test t_stripealign \ bulkstat_unlink_test_modified t_dir_offset t_futimens t_immutable \ - stale_handle + stale_handle pwrite_mmap_blocked SUBDIRS = diff --git a/src/pwrite_mmap_blocked.c b/src/pwrite_mmap_blocked.c new file mode 100644 index 0000000..f24f718 --- /dev/null +++ b/src/pwrite_mmap_blocked.c @@ -0,0 +1,73 @@ +/* Copyright (c) 2010 Intel Corporation + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the Free + * Software Foundation; version 2 of the License + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., 59 + * Temple Place - Suite 330, Boston, MA 02111-1307, USA. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + + + +int main(int argc, char *argv[]) +{ + int ret; + char *cc = "01234"; + char *progname; + loff_t size; + loff_t amount = 1; + loff_t from = 2; + loff_t to = 3; + int fd; + void *mapped_mem; + + progname = argv[0]; + size = 5; + fd = open(argv[1], O_RDWR|O_TRUNC|O_CREAT, 0666); + if (fd < 0) { + fprintf(stderr, "%s: Cannot open `%s': %s\n", + progname, argv[1], strerror(errno)); + exit(1); + } + + if ((ret = pwrite(fd, (const char *)cc, + size, 0)) != size) { + perror("pwrite"); + exit(1); + } + + mapped_mem = mmap(0, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0); + if (mapped_mem == MAP_FAILED) { + perror("mmap"); + exit(1); + } + printf("pwrite %Ld bytes from %Ld to %Ld\n", amount, from, to); + + ret = pwrite(fd, (char *)mapped_mem + from, amount, to); + if (ret != amount) { + perror("pwrite"); + exit(1); + } + + munmap(mapped_mem,0); + close(fd); + exit(0); +} -- 1.6.2.2 From SRS0+pXza+19+fromorbit.com=david@internode.on.net Wed Dec 15 21:10:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBG3ATwB259412 for ; Wed, 15 Dec 2010 21:10:30 -0600 X-ASG-Debug-ID: 1292469141-7b7f01720000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 272A31CD09C7 for ; Wed, 15 Dec 2010 19:12:21 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id 7PqJxtTjVEPKLE8m for ; Wed, 15 Dec 2010 19:12:21 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 49832004-1927428 for multiple; Thu, 16 Dec 2010 13:42:20 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PT4GL-00089z-Ca; Thu, 16 Dec 2010 14:12:13 +1100 Date: Thu, 16 Dec 2010 14:12:13 +1100 From: Dave Chinner To: "Zhong, Xin" Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH v4] xfstests: pwrite hang when writing from mmaped buffer of the same page Subject: Re: [PATCH v4] xfstests: pwrite hang when writing from mmaped buffer of the same page Message-ID: <20101216031213.GK9925@dastard> References: <1292466652-15563-1-git-send-email-xin.zhong@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292466652-15563-1-git-send-email-xin.zhong@intel.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail18.adl2.internode.on.net[150.101.137.103] X-Barracuda-Start-Time: 1292469143 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49555 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 16, 2010 at 10:30:52AM +0800, Zhong, Xin wrote: > The problem is found in meego testing on btrfs: > http://bugs.meego.com/show_bug.cgi?id=6672 > > Reviewed-by: Hellwig, Christoph > Reviewed-by: Chinner, Dave > Signed-off-by: Zhong, Xin Looks good now. Thanks. Cheers, Dave. -- Dave Chinner david@fromorbit.com From BATV+73387e9b29d2b39967e5+2671+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 16 02:41:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBG8f0kt019404 for ; Thu, 16 Dec 2010 02:41:01 -0600 X-ASG-Debug-ID: 1292488974-23b7039b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 02DCD1F72D2 for ; Thu, 16 Dec 2010 00:42:54 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id hqQUUcHG9hHl1Smz for ; Thu, 16 Dec 2010 00:42:54 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PT9QI-0007qS-NQ; Thu, 16 Dec 2010 08:42:50 +0000 Date: Thu, 16 Dec 2010 03:42:50 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 00/10] writeback updates V2 Subject: Re: [PATCH 00/10] writeback updates V2 Message-ID: <20101216084250.GA30107@infradead.org> References: <20101210084215.259628825@bombadil.infradead.org> <20101215232606.GJ9925@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101215232606.GJ9925@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292488975 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 16, 2010 at 10:26:07AM +1100, Dave Chinner wrote: > On Fri, Dec 10, 2010 at 03:42:15AM -0500, Christoph Hellwig wrote: > > - add IO_DIRECT per Dave's review comment > > - fix up a commit message as per Dave's review comment > > - add Reviewed-by: tags for Dave's reviews > > Christoph, do you want me to add this to my xfs-for-2.6.38 branch so > it is easier to test with all the other pending changes we have for > 2.6.38? That's fine with me. From BATV+73387e9b29d2b39967e5+2671+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 16 04:11:39 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGABcZJ033589 for ; Thu, 16 Dec 2010 04:11:39 -0600 X-ASG-Debug-ID: 1292494412-62fd01300000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 146BB1F7D15 for ; Thu, 16 Dec 2010 02:13:32 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id BFLEOOjNidPHVgeS for ; Thu, 16 Dec 2010 02:13:32 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTAq3-0005M1-TL; Thu, 16 Dec 2010 10:13:31 +0000 Date: Thu, 16 Dec 2010 05:13:31 -0500 From: Christoph Hellwig To: "Zhong, Xin" Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH v4] xfstests: pwrite hang when writing from mmaped buffer of the same page Subject: Re: [PATCH v4] xfstests: pwrite hang when writing from mmaped buffer of the same page Message-ID: <20101216101331.GA20505@infradead.org> References: <1292466652-15563-1-git-send-email-xin.zhong@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292466652-15563-1-git-send-email-xin.zhong@intel.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292494413 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 16, 2010 at 10:30:52AM +0800, Zhong, Xin wrote: > The problem is found in meego testing on btrfs: > http://bugs.meego.com/show_bug.cgi?id=6672 As I didn't get around commiting v3 yesterday i've now put in this updated version. Thanks a lot again! From BATV+73387e9b29d2b39967e5+2671+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 16 05:54:09 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGBs7xG046924 for ; Thu, 16 Dec 2010 05:54:09 -0600 X-ASG-Debug-ID: 1292500561-4a7700060000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2505E1CD1F9A for ; Thu, 16 Dec 2010 03:56:02 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id zfLxfPmgEVtu9tTS for ; Thu, 16 Dec 2010 03:56:02 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTCRF-0005K4-Ck; Thu, 16 Dec 2010 11:56:01 +0000 Date: Thu, 16 Dec 2010 06:56:01 -0500 From: Christoph Hellwig To: Boris Ranto Cc: xfs X-ASG-Orig-Subj: Re: xfstests: filter spaces in xfs_quota output in test case 108 Subject: Re: xfstests: filter spaces in xfs_quota output in test case 108 Message-ID: <20101216115601.GA20445@infradead.org> References: <1292425538.3220.14.camel@dhcp-31-190.brq.redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292425538.3220.14.camel@dhcp-31-190.brq.redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292500562 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 15, 2010 at 04:05:38PM +0100, Boris Ranto wrote: > Program xfs_quota can output different amounts of spaces when it is trying to align its output. > This can cause output mismatch on several systems when testing test case 108. > > Attached patch will filter all the consecutive spaces in xfs_quota output to just one space making the test case independent of the alignment. > Thanks, applied. From BATV+73387e9b29d2b39967e5+2671+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 16 05:55:46 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGBtku3047203 for ; Thu, 16 Dec 2010 05:55:46 -0600 X-ASG-Debug-ID: 1292500660-549400bc0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CE8111F7AB1 for ; Thu, 16 Dec 2010 03:57:40 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 2d6H710Cg0MxWuPn for ; Thu, 16 Dec 2010 03:57:40 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTCSo-0005Lo-UO; Thu, 16 Dec 2010 11:57:38 +0000 Date: Thu, 16 Dec 2010 06:57:38 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 1/7] xfs: ensure sync write errors are returned Subject: Re: [PATCH 1/7] xfs: ensure sync write errors are returned Message-ID: <20101216115738.GB20445@infradead.org> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> <1292376208-16282-2-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292376208-16282-2-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292500660 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean > error2 = filemap_write_and_wait_range(mapping, pos, end); > - if (!error) > + if (error2) > error = error2; > if (need_i_mutex) > mutex_lock(&inode->i_mutex); > @@ -777,7 +777,7 @@ write_retry: > > error2 = -xfs_file_fsync(file, > (file->f_flags & __O_SYNC) ? 0 : 1); > - if (!error) > + if (error2 && error >= 0) > error = error2; Shouldn't the filemap_write_and_wait_range clause use a similar check as this one? From BATV+73387e9b29d2b39967e5+2671+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 16 06:04:36 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGC4aql048720 for ; Thu, 16 Dec 2010 06:04:36 -0600 X-ASG-Debug-ID: 1292501189-0ad300d90000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 62838152E123 for ; Thu, 16 Dec 2010 04:06:29 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id EzDKflbXa60iOMMV for ; Thu, 16 Dec 2010 04:06:29 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTCbN-0006yh-6G; Thu, 16 Dec 2010 12:06:29 +0000 Date: Thu, 16 Dec 2010 07:06:29 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 4/7] xfs: split direct IO write path from xfs_file_aio_write Subject: Re: [PATCH 4/7] xfs: split direct IO write path from xfs_file_aio_write Message-ID: <20101216120629.GC20445@infradead.org> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> <1292376208-16282-5-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292376208-16282-5-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292501190 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean > +STATIC ssize_t > +xfs_file_dio_aio_write( > + struct kiocb *iocb, > + const struct iovec *iovp, > + unsigned long nr_segs, > + loff_t pos, > + size_t ocount, > + int *need_i_mutex, > + int *iolock) need_i_mutex == 1 is equivalent to iolock == XFS_IOLOCK_EXCL, I think it's a good idea to throw in a patch to remove the need_i_mutex variable before this patch. Maybe that patch can even add xfs_rw_lock or similar helpers to manipulate the i_mutex, the iolock, and the iolock variable together? Speaking of that, shouldn't xfs_file_aio_read also take the iolock exclusive during the page invalidation and then demote it, just like the write case? The above helpers would enforce that nicely. > + if ((pos & target->bt_smask) || (count & target->bt_smask)) > + return XFS_ERROR(-EINVAL); For the error traps to work this needs to be -XFS_ERROR(EINVAL); From BATV+73387e9b29d2b39967e5+2671+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 16 09:34:43 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_65 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGFYgoq077331 for ; Thu, 16 Dec 2010 09:34:43 -0600 X-ASG-Debug-ID: 1292513797-179c009f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 64A911CD2E57 for ; Thu, 16 Dec 2010 07:36:37 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id rWYTO5RYBaTEMrnF for ; Thu, 16 Dec 2010 07:36:37 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTFsg-00070u-DK; Thu, 16 Dec 2010 15:36:34 +0000 Date: Thu, 16 Dec 2010 10:36:34 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com, linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl X-ASG-Orig-Subj: Re: [PATCH 2/3] xfs: use generic per-cpu counter infrastructure Subject: Re: [PATCH 2/3] xfs: use generic per-cpu counter infrastructure Message-ID: <20101216153634.GA24185@infradead.org> References: <1292203313-15570-1-git-send-email-david@fromorbit.com> <1292203313-15570-3-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292203313-15570-3-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292513797 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 12:21:52PM +1100, Dave Chinner wrote: > From: Dave Chinner > > XFS has a per-cpu counter implementation for in-core superblock > counters that pre-dated the generic implementation. It is complex > and baroque as it is tailored directly to the needs of ENOSPC > detection. > > Now that the generic percpu counter infrastructure has the > percpu_counter_add_unless_lt() function that implements the > necessary threshold checks for us, switch the XFS per-cpu > superblock counters to use the generic percpu counter > infrastructure. > > Signed-off-by: Dave Chinner Looks good to me, Reviewed-by: Christoph Hellwig A little nipick: > -#ifdef HAVE_PERCPU_SB > ASSERT(field < XFS_SBS_ICOUNT || field > XFS_SBS_FDBLOCKS); > -#endif No need to keep this assert - xfs_mod_incore_sb_unlocked already has one for unknown fields. From BATV+73387e9b29d2b39967e5+2671+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 16 09:36:32 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGFaWDe077748 for ; Thu, 16 Dec 2010 09:36:32 -0600 X-ASG-Debug-ID: 1292513906-128d01070000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0FDC51CD111B for ; Thu, 16 Dec 2010 07:38:26 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id gop7wBNQRkBUXeJT for ; Thu, 16 Dec 2010 07:38:26 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTFuU-00074k-K3; Thu, 16 Dec 2010 15:38:26 +0000 Date: Thu, 16 Dec 2010 10:38:26 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com, linux-kernel@vger.kernel.org, a.p.zijlstra@chello.nl X-ASG-Orig-Subj: Re: [PATCH 3/3] xfs: demultiplex xfs_icsb_modify_counters() Subject: Re: [PATCH 3/3] xfs: demultiplex xfs_icsb_modify_counters() Message-ID: <20101216153826.GB24185@infradead.org> References: <1292203313-15570-1-git-send-email-david@fromorbit.com> <1292203313-15570-4-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292203313-15570-4-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292513907 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 12:21:53PM +1100, Dave Chinner wrote: > From: Dave Chinner > > With the conversion to percpu counters, xfs_icsb_modify_counters() really does > not need to exist. Convert the inode counter modifications to use a common > helper function for the one place that calls them, and add another function for > the free block modification and convert all the callers to use that. Looks good, Reviewed-by: Christoph Hellwig From BATV+73387e9b29d2b39967e5+2671+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 16 09:36:54 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGFasdU077829 for ; Thu, 16 Dec 2010 09:36:54 -0600 X-ASG-Debug-ID: 1292513927-425f01730000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4DF4F152F06B for ; Thu, 16 Dec 2010 07:38:47 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id vaVlam5tVUIJmFZZ for ; Thu, 16 Dec 2010 07:38:47 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTFup-0007R9-0i; Thu, 16 Dec 2010 15:38:47 +0000 Date: Thu, 16 Dec 2010 10:38:47 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 5/9] xfs: reduce the number of AIL push wakeups Subject: Re: [PATCH 5/9] xfs: reduce the number of AIL push wakeups Message-ID: <20101216153846.GC24185@infradead.org> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> <1292214743-18073-6-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292214743-18073-6-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292513928 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 03:32:19PM +1100, Dave Chinner wrote: > From: Dave Chinner > > The xfaild often tries to rest to wait for congestion to pass of for > IO to complete, but is regularly woken in tail-pushing situations. > In severe cases, the xfsaild is getting woken tens of thousands of > times a second. Reduce the number needless wakeups by only waking > the xfsaild if the new target is larger than the old one. Further > make short sleeps uninterruptible as they occur when the xfsaild has > decided it needs to back off to allow some IO to complete and being > woken early is counter-productive. This patch causes softlockup warnings in xfsaild for various testcases on my 32-bit x86 VM, but the testcases continue otherwise normally. Example below: [ 361.692515] INFO: task xfsaild/vdb5:8705 blocked for more than 120 seconds. [ 361.697272] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 361.703929] xfsaild/vdb5 D 00000000 0 8705 2 0x00000000 [ 361.708148] f4933f10 00000046 f4b37464 00000000 00000000 f4b37100 f4b37100 00000046 [ 361.711501] f4933eb4 00000046 f4b37100 c0936092 f4b37264 f4b37268 00000000 c0d52d00 [ 361.714786] c0d52d08 c0e96c00 f5735d38 f4933ec0 f4b37100 f6946c00 f4933eec c0160553 [ 361.718120] Call Trace: [ 361.721856] [] ? _raw_spin_unlock_irq+0x22/0x30 [ 361.723439] [] ? finish_task_switch+0x73/0x100 [ 361.725056] [] ? finish_task_switch+0x37/0x100 [ 361.726592] [] ? schedule+0x263/0x9d0 [ 361.727932] [] ? trace_hardirqs_off+0xb/0x10 [ 361.729548] [] schedule_timeout+0x185/0x250 [ 361.731258] [] ? _raw_spin_unlock_irqrestore+0x35/0x60 [ 361.733037] [] ? trace_hardirqs_on+0xb/0x10 [ 361.734513] [] xfsaild+0x54/0xc0 [ 361.735786] [] ? xfsaild+0x0/0xc0 [ 361.737171] [] kthread+0x74/0x80 [ 361.738446] [] ? kthread+0x0/0x80 [ 361.739987] [] kernel_thread_helper+0x6/0x1c [ 361.741589] no locks held by xfsaild/vdb5/8705. From BATV+73387e9b29d2b39967e5+2671+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 16 09:44:56 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGFitws078673 for ; Thu, 16 Dec 2010 09:44:56 -0600 X-ASG-Debug-ID: 1292514410-2dc100350000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 36A971EEAFE for ; Thu, 16 Dec 2010 07:46:50 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id ML0MEFsqFlyLfEQy for ; Thu, 16 Dec 2010 07:46:50 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTG2b-00019b-Nj; Thu, 16 Dec 2010 15:46:49 +0000 Date: Thu, 16 Dec 2010 10:46:49 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 2/2] xfs: don't truncate prealloc from frequently accessed inodes Subject: Re: [PATCH 2/2] xfs: don't truncate prealloc from frequently accessed inodes Message-ID: <20101216154649.GA1388@infradead.org> References: <1292203511-15685-1-git-send-email-david@fromorbit.com> <1292203511-15685-3-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292203511-15685-3-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292514410 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 12:25:11PM +1100, Dave Chinner wrote: > The new counter in the struct xfs_inode fits into a hole in the > structure on 64 bit machines, so does not grow the size of the inode > at all. The count actually is gone now. But this patch totally changes xfstests 203 output for me. Given that the test doesn't care about the allocation pattern it's probably fine, but we'll a fix for the testcase. 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Tvnet Technical Support Team From aelder@sgi.com Thu Dec 16 14:49:51 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGKnpfL122842 for ; Thu, 16 Dec 2010 14:49:51 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay2.corp.sgi.com (Postfix) with ESMTP id F1C3E304064; Thu, 16 Dec 2010 12:51:42 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 16 Dec 2010 14:50:51 -0600 Subject: Re: [PATCH 1/7] xfs: ensure sync write errors are returned From: Alex Elder Reply-To: aelder@sgi.com To: Dave Chinner Cc: xfs@oss.sgi.com In-Reply-To: <1292376208-16282-2-git-send-email-david@fromorbit.com> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> <1292376208-16282-2-git-send-email-david@fromorbit.com> Content-Type: text/plain; charset="UTF-8" Date: Thu, 16 Dec 2010 14:50:49 -0600 Message-ID: <1292532649.2457.54.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 16 Dec 2010 20:50:51.0237 (UTC) FILETIME=[EC9EB150:01CB9D62] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, 2010-12-15 at 12:23 +1100, Dave Chinner wrote: > From: Dave Chinner > > xfs_file_aio_write() only returns the error from synchronous > flushing of the data and inode if error == 0. At the point where > error is being checked, it is guaranteed to be > 0. Therefore any Actually, we have this above the affected code: ... error = -ret; if (ret <= 0) goto out_unlock_internal; So ret must be positive, therefore error is negative (the negative of the number of bytes written). In other words, we enter this block without having seen an error. The return at the end of the function is: return -error; And by the convoluted logic here, that means that the value of error should be a negative byte count if successful, or a positive errno otherwise. And since filemap_write_and_wait_range() returns a negative errno, your fix doesn't look right to me. The existing code is wrong and should be fixed, but a better fix might make the meaning of the variable "error" a little less weird. -Alex > errors returned by the data or fsync flush will never be returned. > Fix the checks so we overwrite the current error once and only if an > error really occurred. > > Signed-off-by: Dave Chinner > --- > fs/xfs/linux-2.6/xfs_file.c | 4 ++-- > 1 files changed, 2 insertions(+), 2 deletions(-) > > diff --git a/fs/xfs/linux-2.6/xfs_file.c b/fs/xfs/linux-2.6/xfs_file.c > index ba8ad42..e1eaec2 100644 > --- a/fs/xfs/linux-2.6/xfs_file.c > +++ b/fs/xfs/linux-2.6/xfs_file.c > @@ -769,7 +769,7 @@ write_retry: > mutex_unlock(&inode->i_mutex); > > error2 = filemap_write_and_wait_range(mapping, pos, end); > - if (!error) > + if (error2) > error = error2; > if (need_i_mutex) > mutex_lock(&inode->i_mutex); > @@ -777,7 +777,7 @@ write_retry: > > error2 = -xfs_file_fsync(file, > (file->f_flags & __O_SYNC) ? 0 : 1); > - if (!error) > + if (error2 && error >= 0) > error = error2; > } > From aelder@sgi.com Thu Dec 16 15:14:08 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGLE7Ih126503 for ; Thu, 16 Dec 2010 15:14:07 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id 4767AAC00B; Thu, 16 Dec 2010 13:15:59 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 16 Dec 2010 15:15:00 -0600 Subject: Re: [PATCH 0/4] log recovery cleanups From: Alex Elder Reply-To: aelder@sgi.com To: Christoph Hellwig Cc: xfs@oss.sgi.com In-Reply-To: <20101201220620.340188389@bombadil.infradead.org> References: <20101201220620.340188389@bombadil.infradead.org> Content-Type: text/plain; charset="UTF-8" Date: Thu, 16 Dec 2010 15:14:58 -0600 Message-ID: <1292534098.2457.55.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 16 Dec 2010 21:15:00.0153 (UTC) FILETIME=[4C3DBA90:01CB9D66] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, 2010-12-01 at 17:06 -0500, Christoph Hellwig wrote: > A couple of cleanups for the log recovery code that I stumbled upon when > researching some improvements for the CRC cleanup. > I've reviewed this series and it all looks good. Reviewed-by: Alex Elder From aelder@sgi.com Thu Dec 16 15:17:11 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGLHB93126769 for ; Thu, 16 Dec 2010 15:17:11 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id BF32DAC00C; Thu, 16 Dec 2010 13:19:05 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 16 Dec 2010 15:18:16 -0600 Subject: Re: [PATCH 3/4] xfs: refactor xlog_recover_commit_trans From: Alex Elder Reply-To: aelder@sgi.com To: Christoph Hellwig Cc: xfs@oss.sgi.com In-Reply-To: <20101201220710.454838485@bombadil.infradead.org> References: <20101201220620.340188389@bombadil.infradead.org> <20101201220710.454838485@bombadil.infradead.org> Content-Type: text/plain; charset="UTF-8" Date: Thu, 16 Dec 2010 15:18:15 -0600 Message-ID: <1292534295.2457.58.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 16 Dec 2010 21:18:16.0732 (UTC) FILETIME=[C1694DC0:01CB9D66] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, 2010-12-01 at 17:06 -0500, Christoph Hellwig wrote: > > Merge the call to xlog_recover_reorder_trans and the loop over the > recovery items from xlog_recover_do_trans into xlog_recover_commit_trans, > and keep the switch statement over the log item types as a separate helper. > > Signed-off-by: Christoph Hellwig > I'm making a small change to this one patch though... . . . > @@ -2757,17 +2699,65 @@ xlog_recover_free_trans( > } > > STATIC int > +xlog_recover_commit_item( > + struct log *log, > + struct xlog_recover *trans, > + xlog_recover_item_t *item, > + int pass) > +{ > + trace_xfs_log_recover_item_recover(log, trans, item, pass); > + > + switch (ITEM_TYPE(item)) { > + case XFS_LI_BUF: > + return xlog_recover_do_buffer_trans(log, item, pass); > + break; I have deleted this "break" statement. > + case XFS_LI_INODE: > + return xlog_recover_do_inode_trans(log, item, pass); > + case XFS_LI_EFI: > + return xlog_recover_do_efi_trans(log, item, trans->r_lsn, pass); > + case XFS_LI_EFD: > + xlog_recover_do_efd_trans(log, item, pass); > + return 0; . . . From SRS0+Vhv0+19+fromorbit.com=david@internode.on.net Thu Dec 16 15:49:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGLn1nr131882 for ; Thu, 16 Dec 2010 15:49:01 -0600 X-ASG-Debug-ID: 1292536252-02a303b90000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CE39F1CD5D30 for ; Thu, 16 Dec 2010 13:50:53 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id 3dVbPyUwcaCwIiBd for ; Thu, 16 Dec 2010 13:50:53 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 4921099-1927428 for multiple; Fri, 17 Dec 2010 08:20:51 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PTLis-0001MX-39; Fri, 17 Dec 2010 08:50:50 +1100 Date: Fri, 17 Dec 2010 08:50:50 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 5/9] xfs: reduce the number of AIL push wakeups Subject: Re: [PATCH 5/9] xfs: reduce the number of AIL push wakeups Message-ID: <20101216215050.GA5193@dastard> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> <1292214743-18073-6-git-send-email-david@fromorbit.com> <20101216153846.GC24185@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101216153846.GC24185@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292536254 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49631 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 16, 2010 at 10:38:47AM -0500, Christoph Hellwig wrote: > On Mon, Dec 13, 2010 at 03:32:19PM +1100, Dave Chinner wrote: > > From: Dave Chinner > > > > The xfaild often tries to rest to wait for congestion to pass of for > > IO to complete, but is regularly woken in tail-pushing situations. > > In severe cases, the xfsaild is getting woken tens of thousands of > > times a second. Reduce the number needless wakeups by only waking > > the xfsaild if the new target is larger than the old one. Further > > make short sleeps uninterruptible as they occur when the xfsaild has > > decided it needs to back off to allow some IO to complete and being > > woken early is counter-productive. > > This patch causes softlockup warnings in xfsaild for various testcases > on my 32-bit x86 VM, but the testcases continue otherwise normally. What tests? > Example below: > > [ 361.692515] INFO: task xfsaild/vdb5:8705 blocked for more than 120 seconds. > [ 361.697272] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > [ 361.703929] xfsaild/vdb5 D 00000000 0 8705 2 0x00000000 > [ 361.708148] f4933f10 00000046 f4b37464 00000000 00000000 f4b37100 f4b37100 00000046 > [ 361.711501] f4933eb4 00000046 f4b37100 c0936092 f4b37264 f4b37268 00000000 c0d52d00 > [ 361.714786] c0d52d08 c0e96c00 f5735d38 f4933ec0 f4b37100 f6946c00 f4933eec c0160553 > [ 361.718120] Call Trace: > [ 361.721856] [] ? _raw_spin_unlock_irq+0x22/0x30 > [ 361.723439] [] ? finish_task_switch+0x73/0x100 > [ 361.725056] [] ? finish_task_switch+0x37/0x100 > [ 361.726592] [] ? schedule+0x263/0x9d0 > [ 361.727932] [] ? trace_hardirqs_off+0xb/0x10 > [ 361.729548] [] schedule_timeout+0x185/0x250 > [ 361.731258] [] ? _raw_spin_unlock_irqrestore+0x35/0x60 > [ 361.733037] [] ? trace_hardirqs_on+0xb/0x10 > [ 361.734513] [] xfsaild+0x54/0xc0 > [ 361.735786] [] ? xfsaild+0x0/0xc0 > [ 361.737171] [] kthread+0x74/0x80 > [ 361.738446] [] ? kthread+0x0/0x80 > [ 361.739987] [] kernel_thread_helper+0x6/0x1c > [ 361.741589] no locks held by xfsaild/vdb5/8705. So this is saying is that a 20ms uninterruptible sleep lasting for more than 120s? Doesn't that imply some kind of scheduler starvation, not an actual XFS problem? Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+/TMC+19+fromorbit.com=david@internode.on.net Thu Dec 16 15:55:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBGLtMOA132581 for ; Thu, 16 Dec 2010 15:55:22 -0600 X-ASG-Debug-ID: 1292536634-425901550000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C90B8145CA98 for ; Thu, 16 Dec 2010 13:57:15 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id CU85eOdy1Pkhli1n for ; Thu, 16 Dec 2010 13:57:15 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50373539-1927428 for multiple; Fri, 17 Dec 2010 08:27:14 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PTLp2-0001NA-EO; Fri, 17 Dec 2010 08:57:12 +1100 Date: Fri, 17 Dec 2010 08:57:12 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 1/7] xfs: ensure sync write errors are returned Subject: Re: [PATCH 1/7] xfs: ensure sync write errors are returned Message-ID: <20101216215712.GB5193@dastard> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> <1292376208-16282-2-git-send-email-david@fromorbit.com> <20101216115738.GB20445@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101216115738.GB20445@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292536636 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49630 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 16, 2010 at 06:57:38AM -0500, Christoph Hellwig wrote: > > error2 = filemap_write_and_wait_range(mapping, pos, end); > > - if (!error) > > + if (error2) > > error = error2; > > if (need_i_mutex) > > mutex_lock(&inode->i_mutex); > > @@ -777,7 +777,7 @@ write_retry: > > > > error2 = -xfs_file_fsync(file, > > (file->f_flags & __O_SYNC) ? 0 : 1); > > - if (!error) > > + if (error2 && error >= 0) > > error = error2; > > Shouldn't the filemap_write_and_wait_range clause use a similar check as > this one? No need, because when we enter the branch, error is guaranteed to be greater than zero as the code jumps over this branch if it is <= 0. Hence we only need to overwrite error with error2 from filemap_write_and_wait_range() if error2 actually contains an error (i.e. < 0). The second hunk then has to deal with the fact that error can have any value, and we only want to overwrite error if it doesn't already contain an error value and error2 does. Hence the check for error >= 0 to ensure we don't overwrite an error from filemap_write_and_wait_range(). Cheers, Dave. -- Dave Chinner david@fromorbit.com From BATV+a54cfc6daf38c44dd5c4+2672+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 16 18:21:17 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBH0LFan156422 for ; Thu, 16 Dec 2010 18:21:17 -0600 X-ASG-Debug-ID: 1292545389-6e9703830000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id ECAB21CD2D19 for ; Thu, 16 Dec 2010 16:23:09 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id NBXFhIGr6bN3d1Yf for ; Thu, 16 Dec 2010 16:23:09 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTO6F-0006PC-CJ; Fri, 17 Dec 2010 00:23:07 +0000 Date: Thu, 16 Dec 2010 19:23:07 -0500 From: Christoph Hellwig To: Dave Chinner Cc: Christoph Hellwig , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 5/9] xfs: reduce the number of AIL push wakeups Subject: Re: [PATCH 5/9] xfs: reduce the number of AIL push wakeups Message-ID: <20101217002307.GA24135@infradead.org> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> <1292214743-18073-6-git-send-email-david@fromorbit.com> <20101216153846.GC24185@infradead.org> <20101216215050.GA5193@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101216215050.GA5193@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292545389 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, Dec 17, 2010 at 08:50:50AM +1100, Dave Chinner wrote: > What tests? I couldn't really see a pattern yet - it's different ones and different amount of warnings during each run. > So this is saying is that a 20ms uninterruptible sleep lasting for more > than 120s? Doesn't that imply some kind of scheduler starvation, not > an actual XFS problem? It does for sure look odd to me. I'll do a sub-commit bisect between the two hunk in the patch tomorrow to drill a bit deeper into what's going on. From SRS0+YY2r+20+fromorbit.com=david@internode.on.net Fri Dec 17 00:41:40 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBH6fesb199017 for ; Fri, 17 Dec 2010 00:41:40 -0600 X-ASG-Debug-ID: 1292568212-6e93014b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 67E591CD7543 for ; Thu, 16 Dec 2010 22:43:33 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id AjGk72BgwcNlfDFa for ; Thu, 16 Dec 2010 22:43:33 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50304038-1927428 for multiple; Fri, 17 Dec 2010 17:13:31 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PTU2L-00026Q-UF; Fri, 17 Dec 2010 17:43:29 +1100 Date: Fri, 17 Dec 2010 17:43:29 +1100 From: Dave Chinner To: Alex Elder Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 1/7] xfs: ensure sync write errors are returned Subject: Re: [PATCH 1/7] xfs: ensure sync write errors are returned Message-ID: <20101217064329.GD5193@dastard> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> <1292376208-16282-2-git-send-email-david@fromorbit.com> <1292532649.2457.54.camel@doink> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292532649.2457.54.camel@doink> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1292568214 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49665 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 16, 2010 at 02:50:49PM -0600, Alex Elder wrote: > On Wed, 2010-12-15 at 12:23 +1100, Dave Chinner wrote: > > From: Dave Chinner > > > > xfs_file_aio_write() only returns the error from synchronous > > flushing of the data and inode if error == 0. At the point where > > error is being checked, it is guaranteed to be > 0. Therefore any > > Actually, we have this above the affected code: > ... > error = -ret; > if (ret <= 0) > goto out_unlock_internal; > > So ret must be positive, therefore error is negative > (the negative of the number of bytes written). In > other words, we enter this block without having seen > an error. > > The return at the end of the function is: > return -error; > > And by the convoluted logic here, that means that the > value of error should be a negative byte count if > successful, or a positive errno otherwise. Oh, right, yeah, I screwed that up, didn't I? > And since filemap_write_and_wait_range() returns a > negative errno, your fix doesn't look right to me. I will fix it up. > The existing code is wrong and should be fixed, but a > better fix might make the meaning of the variable "error" > a little less weird. The real problem is that xfs functions return positive errors, and the linux functions return negative errors. It would be much less of a hassle if we fixed that problem... Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+X4no+20+fromorbit.com=david@internode.on.net Fri Dec 17 01:29:37 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBH7TaPJ203236 for ; Fri, 17 Dec 2010 01:29:37 -0600 X-ASG-Debug-ID: 1292571088-55b803dd0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0A973145E523 for ; Thu, 16 Dec 2010 23:31:28 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id KxCbuwBlqW4n9JrY for ; Thu, 16 Dec 2010 23:31:28 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50698586-1927428 for multiple; Fri, 17 Dec 2010 18:01:27 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PTUmk-0002AD-10; Fri, 17 Dec 2010 18:31:26 +1100 Date: Fri, 17 Dec 2010 18:31:25 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 4/7] xfs: split direct IO write path from xfs_file_aio_write Subject: Re: [PATCH 4/7] xfs: split direct IO write path from xfs_file_aio_write Message-ID: <20101217073125.GE5193@dastard> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> <1292376208-16282-5-git-send-email-david@fromorbit.com> <20101216120629.GC20445@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101216120629.GC20445@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292571091 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49668 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 16, 2010 at 07:06:29AM -0500, Christoph Hellwig wrote: > > +STATIC ssize_t > > +xfs_file_dio_aio_write( > > + struct kiocb *iocb, > > + const struct iovec *iovp, > > + unsigned long nr_segs, > > + loff_t pos, > > + size_t ocount, > > + int *need_i_mutex, > > + int *iolock) > > need_i_mutex == 1 is equivalent to iolock == XFS_IOLOCK_EXCL, I think > it's a good idea to throw in a patch to remove the need_i_mutex variable > before this patch. > > Maybe that patch can even add xfs_rw_lock or similar helpers to > manipulate the i_mutex, the iolock, and the iolock variable together? That sounds like a fine idea. > Speaking of that, shouldn't xfs_file_aio_read also take the iolock > exclusive during the page invalidation and then demote it, just like > the write case? The above helpers would enforce that nicely. Probably, though it might be best to leave that to another cleanup series. I'll see how much perturbation of the read path it makes.... > > + if ((pos & target->bt_smask) || (count & target->bt_smask)) > > + return XFS_ERROR(-EINVAL); > > For the error traps to work this needs to be > > -XFS_ERROR(EINVAL); Ok, will fix. I just copied the existing code. Cheers, Dave. -- Dave Chinner david@fromorbit.com From lczerner@redhat.com Fri Dec 17 03:30:47 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.4 required=5.0 tests=BAYES_00,J_CHICKENPOX_43, J_CHICKENPOX_44,J_CHICKENPOX_64,J_CHICKENPOX_66,J_CHICKENPOX_73 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBH9UlfF215809 for ; Fri, 17 Dec 2010 03:30:47 -0600 X-ASG-Debug-ID: 1292578361-712a01b00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4C4481CD7DAB for ; Fri, 17 Dec 2010 01:32:41 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id S9i2sXVqLTT5MBzS for ; Fri, 17 Dec 2010 01:32:41 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oBH9WXBu015333 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Fri, 17 Dec 2010 04:32:33 -0500 Received: from dhcp-lab-213.englab.brq.redhat.com (dhcp-27-109.brq.redhat.com [10.34.27.109]) by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id oBH9WUpI011030 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Fri, 17 Dec 2010 04:32:32 -0500 Date: Fri, 17 Dec 2010 10:32:30 +0100 (CET) From: Lukas Czerner X-X-Sender: lukas@dhcp-lab-213.englab.brq.redhat.com To: Lukas Czerner cc: xfs@oss.sgi.com, esandeen@redhat.com, hch@infradead.org X-ASG-Orig-Subj: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Subject: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation In-Reply-To: <1291996407-26251-1-git-send-email-lczerner@redhat.com> Message-ID: References: <1291996407-26251-1-git-send-email-lczerner@redhat.com> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Scanned-By: MIMEDefang 2.67 on 10.5.11.12 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1292578362 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, 10 Dec 2010, Lukas Czerner wrote: > FITRIM ioctl is used on a mounted filesystem to discard (or "trim") > blocks which are not in use by the filesystem. This is useful for > solid-state drives (SSDs) and thinly-provi-sioned storage. This test > helps to verify filesystem FITRIM implementation to assure that it > does not corrupts data. > > This test creates checksums of all files in /usr/share/doc directory and > run several processes which clear its working directory on SCRATCH_MNT, > then copy everything from /usr/share/doc into its working directory, create > list of files in working directory and its checksums and compare it with the > original list of checksums. Every process works in the loop so it repeat > remove->copy->check, while fstrim tool is running simultaneously. > > Fstrim is just a helper tool which uses FITRIM ioctl to actually do the > filesystem discard. > > I found this very useful because when the FITRIM is really buggy (thus > data-destroying) the 248 test will notice, because checksums will most > likely change. Common guys, how many times I need to repost this ? :) Or do anyone have objections ? -Lukas > > Signed-off-by: Lukas Czerner > --- > 248 | 184 +++++++++++++++++++++++++++++++++++++++++ > 248.out | 3 + > group | 1 + > src/Makefile | 2 +- > src/fstrim.c | 257 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ > 5 files changed, 446 insertions(+), 1 deletions(-) > create mode 100755 248 > create mode 100644 248.out > create mode 100644 src/fstrim.c > > diff --git a/248 b/248 > new file mode 100755 > index 0000000..a6cfce2 > --- /dev/null > +++ b/248 > @@ -0,0 +1,184 @@ > +#!/bin/bash > +# FS QA Test No. 248 > +# > +# This test was created in order to verify filesystem FITRIM implementation. > +# By many concurrent copy and remove operations and checking that files > +# does not change after copied into SCRATCH_MNT test if FITRIM implementation > +# corrupts the filesystem (data/metadata). > +# > +#----------------------------------------------------------------------- > +# Copyright 2010 (C) Red Hat, Inc., Lukas Czerner > +# > +# This program is free software; you can redistribute it and/or > +# modify it under the terms of the GNU General Public License as > +# published by the Free Software Foundation. > +# > +# This program is distributed in the hope that it would be useful, > +# but WITHOUT ANY WARRANTY; without even the implied warranty of > +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > +# GNU General Public License for more details. > +# > +# You should have received a copy of the GNU General Public License > +# along with this program; if not, write the Free Software Foundation, > +# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA > +#----------------------------------------------------------------------- > + > +owner=lczerner@redhat.com > + > +seq=`basename $0` > +echo "QA output created by $seq" > + > +here=`pwd` > +tmp=`mktemp -d` > +status=1 # failure is the default! > +trap "_cleanup; exit \$status" 0 1 3 > +trap "_destroy; exit \$status" 2 15 > +chpid=0 > +mypid=$$ > + > +# get standard environment, filters and checks > +. ./common.rc > +. ./common.filter > + > +# real QA test starts here > +_supported_fs generic > +_supported_os Linux > +_require_scratch > +_scratch_mkfs >/dev/null 2>&1 > +_scratch_mount > + > +_cleanup() > +{ > + rm -rf $tmp > +} > + > +_destroy() > +{ > + kill $pids $fstrim_pid > + wait $pids $fstrim_pid > + rm -rf $tmp > +} > + > +_destroy_fstrim() > +{ > + kill $fpid > + wait $fpid > +} > + > +_fail() > +{ > + echo "$1" > + kill $mypid > +} > + > +## > +# Background FSTRIM loop. We are trimming the device in the loop and for > +# better test coverage, we are doing whole device trim followed by several > +# smaller trims. > +## > +fstrim_loop() > +{ > + trap "_destroy_fstrim; exit \$status" 2 15 > + fsize=$(df | grep $SCRATCH_MNT | grep $SCRATCH_DEV | awk '{print $2}') > + > + while true ; do > + step=1048576 > + start=0 > + $here/src/fstrim $SCRATCH_MNT & > + fpid=$! > + wait $fpid > + while [ $start -lt $fsize ] ; do > + $here/src/fstrim -s ${start}k -l ${step}k $SCRATCH_MNT & > + fpid=$! > + > + ## > + # All the waiting is done because Bash is incredibly > + # stupid. As you know, fstrim_loop is run at background > + # and when the test is over, or when it is killed (with > + # ^C), because of trap, it tries to kill fstrim_loop. > + # However, it does not kill currently running commands, > + # so fstrim might be still running making it impossible > + # to umount the SCRATCH_MNT and hence resulting in > + # error. > + ## > + wait $fpid > + start=$(( $start + $step )) > + done > + done > +} > + > +function check_sums() { > + dir=$1 > + > + ( > + cd $SCRATCH_MNT/$p > + find -P . -xdev -type f -print0 | xargs -0 md5sum | sort -o $tmp/stress.$$.$p > + ) > + > + diff $tmp/content.sums $tmp/stress.$$.$p > + if [ $? -ne 0 ]; then > + _fail "!!!Checksums has changed - Filesystem possibly corrupted!!!\n" > + fi > + rm -f $tmp/stress.$$.$p > +} > + > +function run_process() { > + local p=$1 > + repeat=10 > + trap "kill $chpid; wait $chpid" 2 15 > + > + sleep $((10*$p))s & > + export chpid=$! && wait $chpid &> /dev/null > + chpid=0 > + > + while [ $repeat -gt 0 ]; do > + > + # Remove old directories. > + rm -rf $SCRATCH_MNT/$p > + export chpid=$! && wait $chpid &> /dev/null > + > + # Copy content -> partition. > + mkdir $SCRATCH_MNT/$p > + cp -ax $content/* $SCRATCH_MNT/$p > + export chpid=$! && wait $chpid &> /dev/null > + > + check_sums > + repeat=$(( $repeat - 1 )) > + done > +} > + > +nproc=20 > +content=/usr/share/doc > + > +# Check for FITRIM support > +echo -n "Checking FITRIM support: " > +$here/src/fstrim -l 10M $SCRATCH_MNT > +[ $? -ne 0 ] && exit > +echo "done." > + > +mkdir -p $tmp > + > +( > +cd $content > +find -P . -xdev -type f -print0 | xargs -0 md5sum | sort -o $tmp/content.sums > +) > + > +echo -n "Running the test: " > +pids="" > +fstrim_loop & > +fstrim_pid=$! > +p=1 > +while [ $p -le $nproc ]; do > + run_process $p & > + pids="$pids $!" > + p=$(($p+1)) > +done > +echo "done." > + > +wait $pids > +kill $fstrim_pid > +wait $fstrim_pid > + > +status=0 > + > +exit > diff --git a/248.out b/248.out > new file mode 100644 > index 0000000..880d9c7 > --- /dev/null > +++ b/248.out > @@ -0,0 +1,3 @@ > +QA output created by 248 > +Checking FITRIM support: done. > +Running the test: done. > diff --git a/group b/group > index 0f94dd9..19eec07 100644 > --- a/group > +++ b/group > @@ -361,3 +361,4 @@ deprecated > 245 auto quick dir > 246 auto quick rw > 247 auto quick rw > +248 ioctl trim > diff --git a/src/Makefile b/src/Makefile > index b827bd0..885fd65 100644 > --- a/src/Makefile > +++ b/src/Makefile > @@ -17,7 +17,7 @@ LINUX_TARGETS = xfsctl bstat t_mtab getdevicesize preallo_rw_pattern_reader \ > preallo_rw_pattern_writer ftrunc trunc fs_perms testx looptest \ > locktest unwritten_mmap bulkstat_unlink_test t_stripealign \ > bulkstat_unlink_test_modified t_dir_offset t_futimens t_immutable \ > - stale_handle > + stale_handle fstrim > > SUBDIRS = > > diff --git a/src/fstrim.c b/src/fstrim.c > new file mode 100644 > index 0000000..45ad841 > --- /dev/null > +++ b/src/fstrim.c > @@ -0,0 +1,257 @@ > +/* > + * fstrim.c -- discard the part (or whole) of mounted filesystem. > + * > + * Copyright (C) 2009 Red Hat, Inc., Lukas Czerner > + * > + * This program is free software: you can redistribute it and/or modify > + * it under the terms of the GNU General Public License as published by > + * the Free Software Foundation, either version 2 of the License, or > + * (at your option) any later version. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * You should have received a copy of the GNU General Public License > + * along with this program. If not, see . > + * > + * This program uses FITRIM ioctl to discard parts or the whole filesystem > + * online (mounted). You can specify range (start and lenght) to be > + * discarded, or simply discard while filesystem. > + * > + * Usage: fstrim [options] > + */ > + > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > +#include > + > +#include > +#include > +#include > + > +#ifndef FITRIM > +struct fstrim_range { > + uint64_t start; > + uint64_t len; > + uint64_t minlen; > +}; > +#define FITRIM _IOWR('X', 121, struct fstrim_range) > +#endif > + > +const char *program_name = "fstrim"; > + > +struct options { > + struct fstrim_range *range; > + char mpoint[PATH_MAX]; > + char verbose; > +}; > + > +static void usage(void) > +{ > + fprintf(stderr, > + "Usage: %s [-s start] [-l length] [-m minimum-extent]" > + " [-v] {mountpoint}\n\t" > + "-s Starting Byte to discard from\n\t" > + "-l Number of Bytes to discard from the start\n\t" > + "-m Minimum extent length to discard\n\t" > + "-v Verbose - number of discarded bytes\n", > + program_name); > +} > + > +static void err_exit(const char *fmt, ...) > +{ > + va_list pvar; > + va_start(pvar, fmt); > + vfprintf(stderr, fmt, pvar); > + va_end(pvar); > + usage(); > + exit(EXIT_FAILURE); > +} > + > +/** > + * Get the number from argument. It can be number followed by > + * units: k|K, m|M, g|G, t|T > + */ > +static unsigned long long get_number(char **optarg) > +{ > + char *opt, *end; > + unsigned long long number, max; > + > + /* get the max to avoid overflow */ > + max = ULLONG_MAX / 1024; > + number = 0; > + opt = *optarg; > + > + if (*opt == '-') { > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + } > + > + errno = 0; > + number = strtoul(opt, &end , 0); > + if (errno) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(errno), *optarg); > + > + /* > + * Convert units to numbers. Fall-through stack is used for units > + * so absence of breaks is intentional. > + */ > + switch (*end) { > + case 'T': /* terabytes */ > + case 't': > + if (number > max) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + number *= 1024; > + case 'G': /* gigabytes */ > + case 'g': > + if (number > max) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + number *= 1024; > + case 'M': /* megabytes */ > + case 'm': > + if (number > max) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + number *= 1024; > + case 'K': /* kilobytes */ > + case 'k': > + if (number > max) > + err_exit("%s: %s (%s)\n", program_name, > + strerror(ERANGE), *optarg); > + number *= 1024; > + end++; > + case '\0': /* end of the string */ > + break; > + default: > + err_exit("%s: %s (%s)\n", program_name, > + strerror(EINVAL), *optarg); > + return 0; > + } > + > + if (*end != '\0') { > + err_exit("%s: %s (%s)\n", program_name, > + strerror(EINVAL), *optarg); > + } > + > + return number; > +} > + > +static int parse_opts(int argc, char **argv, struct options *opts) > +{ > + int c; > + > + while ((c = getopt(argc, argv, "s:l:m:v")) != EOF) { > + switch (c) { > + case 's': /* starting point */ > + opts->range->start = get_number(&optarg); > + break; > + case 'l': /* length */ > + opts->range->len = get_number(&optarg); > + break; > + case 'm': /* minlen */ > + opts->range->minlen = get_number(&optarg); > + break; > + case 'v': /* verbose */ > + opts->verbose = 1; > + break; > + default: > + return EXIT_FAILURE; > + } > + } > + > + return 0; > +} > + > +int main(int argc, char **argv) > +{ > + struct options *opts; > + struct stat sb; > + int fd, err = 0, ret = EXIT_FAILURE; > + > + opts = malloc(sizeof(struct options)); > + if (!opts) > + err_exit("%s: malloc(): %s\n", program_name, strerror(errno)); > + > + opts->range = NULL; > + opts->verbose = 0; > + > + if (argc > 1) > + strncpy(opts->mpoint, argv[argc - 1], sizeof(opts->mpoint)); > + > + opts->range = calloc(1, sizeof(struct fstrim_range)); > + if (!opts->range) { > + fprintf(stderr, "%s: calloc(): %s\n", program_name, > + strerror(errno)); > + goto free_opts; > + } > + > + opts->range->len = ULLONG_MAX; > + > + if (argc > 2) > + err = parse_opts(argc, argv, opts); > + > + if (err) { > + usage(); > + goto free_opts; > + } > + > + if (strnlen(opts->mpoint, 1) < 1) { > + fprintf(stderr, "%s: You have to specify mount point.\n", > + program_name); > + usage(); > + goto free_opts; > + } > + > + if (stat(opts->mpoint, &sb) == -1) { > + fprintf(stderr, "%s: %s: %s\n", program_name, > + opts->mpoint, strerror(errno)); > + usage(); > + goto free_opts; > + } > + > + if (!S_ISDIR(sb.st_mode)) { > + fprintf(stderr, "%s: %s: (%s)\n", program_name, > + opts->mpoint, strerror(ENOTDIR)); > + usage(); > + goto free_opts; > + } > + > + fd = open(opts->mpoint, O_RDONLY); > + if (fd < 0) { > + fprintf(stderr, "%s: open(%s): %s\n", program_name, > + opts->mpoint, strerror(errno)); > + goto free_opts; > + } > + > + if (ioctl(fd, FITRIM, opts->range)) { > + fprintf(stderr, "%s: FSTRIM: %s\n", program_name, > + strerror(errno)); > + goto free_opts; > + } > + > + if ((opts->verbose) && (opts->range)) > + fprintf(stdout, "%lu Bytes were trimmed\n", opts->range->len); > + > + ret = EXIT_SUCCESS; > + > +free_opts: > + if (opts) { > + if (opts->range) > + free(opts->range); > + free(opts); > + } > + > + return ret; > +} > -- From BATV+a54cfc6daf38c44dd5c4+2672+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 17 05:16:52 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBHBGnOh222141 for ; Fri, 17 Dec 2010 05:16:52 -0600 X-ASG-Debug-ID: 1292584724-5a6d01530000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id ECE001CD6FDB for ; Fri, 17 Dec 2010 03:18:44 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id uNbzOhc1KYVmBSZW for ; Fri, 17 Dec 2010 03:18:44 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTYKh-0004Ey-8p; Fri, 17 Dec 2010 11:18:43 +0000 Date: Fri, 17 Dec 2010 06:18:43 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 1/9] xfs: fix EFI transaction cancellation. Subject: Re: [PATCH 1/9] xfs: fix EFI transaction cancellation. Message-ID: <20101217111843.GA12965@infradead.org> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> <1292214743-18073-2-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292214743-18073-2-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292584724 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Looks good, Reviewed-by: Christoph Hellwig From BATV+a54cfc6daf38c44dd5c4+2672+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 17 05:21:00 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_21 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBHBL0Y6222425 for ; Fri, 17 Dec 2010 05:21:00 -0600 X-ASG-Debug-ID: 1292584974-5bf502e70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0E4011FB940 for ; Fri, 17 Dec 2010 03:22:54 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 2MQofLxmi8sNL2q0 for ; Fri, 17 Dec 2010 03:22:54 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTYOk-00050A-Fy; Fri, 17 Dec 2010 11:22:54 +0000 Date: Fri, 17 Dec 2010 06:22:54 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 2/9] xfs: Pull EFI/EFD handling out from under the AIL lock Subject: Re: [PATCH 2/9] xfs: Pull EFI/EFD handling out from under the AIL lock Message-ID: <20101217112254.GB12965@infradead.org> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> <1292214743-18073-3-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292214743-18073-3-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292584975 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Looks good, Reviewed-by: Christoph Hellwig Some minor comments below: > +STATIC void > +__xfs_efi_release( > + struct xfs_efi_log_item *efip) > +{ > + struct xfs_ail *ailp = efip->efi_item.li_ailp; > + > + if (!test_and_clear_bit(XFS_EFI_COMMITTED, &efip->efi_flags)) { > + spin_lock(&ailp->xa_lock); > + /* xfs_trans_ail_delete() drops the AIL lock. */ > + xfs_trans_ail_delete(ailp, (xfs_log_item_t *)efip); The second argument should be &efip->efi_item to preserve ty;e safety. > void > xfs_efi_release(xfs_efi_log_item_t *efip, > uint nextents) > { > + ASSERT(atomic_read(&efip->efi_next_extent) >= nextents); > + if (!atomic_sub_and_test(nextents, &efip->efi_next_extent)) > + return; > > + __xfs_efi_release(efip); Why not just: if (atomic_sub_and_test(nextents, &efip->efi_next_extent)) __xfs_efi_release(efip); ? From BATV+a54cfc6daf38c44dd5c4+2672+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 17 05:23:09 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBHBN9G9222564 for ; Fri, 17 Dec 2010 05:23:09 -0600 X-ASG-Debug-ID: 1292585103-1b22037d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 6AA59145EDFD for ; Fri, 17 Dec 2010 03:25:03 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id r1q6OZCPUJtsvk5M for ; Fri, 17 Dec 2010 03:25:03 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTYQo-0005i5-MH; Fri, 17 Dec 2010 11:25:02 +0000 Date: Fri, 17 Dec 2010 06:25:02 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 4/9] xfs: bulk AIL insertion during transaction commit Subject: Re: [PATCH 4/9] xfs: bulk AIL insertion during transaction commit Message-ID: <20101217112502.GC12965@infradead.org> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> <1292214743-18073-5-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292214743-18073-5-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292585104 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Looks good, Reviewed-by: Christoph Hellwig Minor style nipicks below: > + /* > + * Not a bulk update option due to unusual item_lsn. > + * Push into AIL immediately, rechecking the lsn once > + * we have the ail lock. Then unpin the item. > + */ > + spin_lock(&ailp->xa_lock); > + if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) { > + xfs_trans_ail_update(ailp, lip, item_lsn); > + } else { > + spin_unlock(&ailp->xa_lock); > + } No need for the curly braces. > + ASSERT((&next_lip->li_ail == &ailp->xa_ail) || > + (XFS_LSN_CMP(next_lip->li_lsn, lsn) <= 0)); No need for the inner braces. From BATV+a54cfc6daf38c44dd5c4+2672+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 17 05:23:44 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBHBNiTB222602 for ; Fri, 17 Dec 2010 05:23:44 -0600 X-ASG-Debug-ID: 1292585139-6dad01910000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id AFFCE1FB94F for ; Fri, 17 Dec 2010 03:25:39 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 9A72kaX0XK6kfsgr for ; Fri, 17 Dec 2010 03:25:39 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTYRP-0005iy-Aq; Fri, 17 Dec 2010 11:25:39 +0000 Date: Fri, 17 Dec 2010 06:25:39 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 7/9] xfs: remove all the inodes on a buffer from the AIL in bulk Subject: Re: [PATCH 7/9] xfs: remove all the inodes on a buffer from the AIL in bulk Message-ID: <20101217112539.GD12965@infradead.org> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> <1292214743-18073-8-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292214743-18073-8-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292585139 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Looks good for now, Reviewed-by: Christoph Hellwig From BATV+a54cfc6daf38c44dd5c4+2672+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 17 08:14:04 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBHEE3P0233142 for ; Fri, 17 Dec 2010 08:14:04 -0600 X-ASG-Debug-ID: 1292595358-0daa03670000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 5D7381DB9DC8 for ; Fri, 17 Dec 2010 06:15:58 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id XiFnAFNNqFnBMiox for ; Fri, 17 Dec 2010 06:15:58 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTb6C-0000H0-M8; Fri, 17 Dec 2010 14:15:56 +0000 Date: Fri, 17 Dec 2010 09:15:56 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 8/9] xfs: use AIL bulk update function to implement single updates Subject: Re: [PATCH 8/9] xfs: use AIL bulk update function to implement single updates Message-ID: <20101217141556.GA30830@infradead.org> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> <1292214743-18073-9-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292214743-18073-9-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292595358 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 03:32:22PM +1100, Dave Chinner wrote: > From: Dave Chinner > > We now have two copies of AIL insert operations that are mostly > duplicate functionality. The single log item updates can be > implemented via the bulk updates by turning xfs_trans_ail_update() > into a simple wrapper. This removes all the duplicate insert > functionality and associated helpers. Looks good, Reviewed-by: Christoph Hellwig > + struct xfs_ail *ailp, > +static inline void > +xfs_trans_ail_update( > + xfs_log_item_t *lip, > + xfs_lsn_t lsn) __releases(ailp->xa_lock) > +{ > + struct xfs_log_item *log_items[1] = { lip, }; > + > + xfs_trans_ail_update_bulk(ailp, log_items, 1, lsn); This could be simplified down to: xfs_trans_ail_update_bulk(ailp, &lip, 1, lsn); at which point it could even become a macro. From BATV+a54cfc6daf38c44dd5c4+2672+infradead.org+hch@bombadil.srs.infradead.org Fri Dec 17 08:14:39 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBHEEdKh233175 for ; Fri, 17 Dec 2010 08:14:39 -0600 X-ASG-Debug-ID: 1292595393-1bee036c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 39A64145BDC3 for ; Fri, 17 Dec 2010 06:16:34 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id IoYtw6bBFdCVduuU for ; Fri, 17 Dec 2010 06:16:34 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PTb6n-0000HT-It; Fri, 17 Dec 2010 14:16:33 +0000 Date: Fri, 17 Dec 2010 09:16:33 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 9/9] xfs: use AIL bulk delete function to implement single delete Subject: Re: [PATCH 9/9] xfs: use AIL bulk delete function to implement single delete Message-ID: <20101217141633.GB30830@infradead.org> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> <1292214743-18073-10-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292214743-18073-10-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292595394 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 03:32:23PM +1100, Dave Chinner wrote: > From: Dave Chinner > > We now have two copies of AIL delete operations that are mostly > duplicate functionality. The single log item deletes can be > implemented via the bulk updates by turning xfs_trans_ail_delete() > into a simple wrapper. This removes all the duplicate delete > functionality and associated helpers. Looks good, Reviewed-by: Christoph Hellwig The same comment about just taking the address as for the previous patch applies. From aelder@oss.sgi.com Fri Dec 17 09:59:20 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-0.9 required=5.0 tests=ALL_TRUSTED,BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from oss.sgi.com (localhost [127.0.0.1]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBHFxKGp241280 for ; Fri, 17 Dec 2010 09:59:20 -0600 Received: (from aelder@localhost) by oss.sgi.com (8.14.3/8.14.3/Submit) id oBHFxKBD241172; Fri, 17 Dec 2010 09:59:20 -0600 Date: Fri, 17 Dec 2010 09:59:20 -0600 Message-Id: <201012171559.oBHFxKBD241172@oss.sgi.com> From: xfs@oss.sgi.com To: xfs@oss.sgi.com Subject: [XFS updates] XFS development tree branch, master, updated. v2.6.37-rc4-23-g489a150 X-Git-Refname: refs/heads/master X-Git-Reftype: branch X-Git-Oldrev: 05340d4ab2ec2b6b4962c1c41c6ea8fb550f947b X-Git-Newrev: 489a150f6454e2cd93d9e0ee6d7c5a361844f62a This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "XFS development tree". The branch, master has been updated 489a150 xfs: factor duplicate code in xfs_alloc_ag_vextent_near into a helper 9f9baab xfs: clean up xfs_alloc_ag_vextent_exact ecff71e xfs: simplify xfs_map_at_offset aeea1b1 xfs: refactor xfs_vm_writepage 2fa24f9 xfs: remove the all_bh flag from xfs_convert_page ed1e7b7 xfs: remove xfs_probe_cluster 8ff2957 xfs: simplify xfs_map_blocks a206c81 xfs: kill xfs_iomap 405f804 xfs: cleanup the xfs_iomap_write_* helpers 6ac7248 xfs: a few small tweaks for overwrites in xfs_vm_writepage 221cb25 xfs: remove some dead bio handling code 85da94c xfs: improve mapping type check in xfs_vm_writepage c9f71f5 xfs: untangle phase1 vs phase2 recovery helpers d045094 xfs: refactor xlog_recover_commit_trans d5689ea xfs: use struct list_head for the buf cancel table e2714bf xfs: remove leftovers of old buffer log items in recovery code 576ecb8 xfs: fix exporting with left over 64-bit inodes from 05340d4ab2ec2b6b4962c1c41c6ea8fb550f947b (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit 489a150f6454e2cd93d9e0ee6d7c5a361844f62a Author: Christoph Hellwig Date: Fri Dec 10 15:04:11 2010 +0000 xfs: factor duplicate code in xfs_alloc_ag_vextent_near into a helper Add a new xfs_alloc_find_best_extent that does a forward/backward search in the allocation btree. That code previously was existed two times in xfs_alloc_ag_vextent_near, once for each search direction. Based on an earlier patch from Dave Chinner. Signed-off-by: Christoph Hellwig Signed-off-by: Alex Elder commit 9f9baab38dacd11fe6095a1e59f3783a305f7020 Author: Christoph Hellwig Date: Fri Dec 10 15:03:57 2010 +0000 xfs: clean up xfs_alloc_ag_vextent_exact Use a goto label to consolidate all block not found cases, and add a tracepoint for them. Also clean up a few whitespace issues. Based on an earlier patch from Dave Chinner. Signed-off-by: Christoph Hellwig Signed-off-by: Alex Elder commit ecff71e677c6d469f525dcf31ada709d5858307c Author: Christoph Hellwig Date: Fri Dec 10 08:42:25 2010 +0000 xfs: simplify xfs_map_at_offset Move the buffer locking into the callers as they need to do it wether they call xfs_map_at_offset or not. Remove the b_bdev assignment, which is already done by get_blocks. Remove the duplicate extent type asserts in xfs_convert_page just before calling xfs_map_at_offset. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder commit aeea1b1f81800e362a3aca86d769d02e137a8fa7 Author: Christoph Hellwig Date: Fri Dec 10 08:42:24 2010 +0000 xfs: refactor xfs_vm_writepage After the last patches the code for overwrites is the same as for delayed and unwritten extents except that it doesn't need to call xfs_map_at_offset. Take care of that fact to simplify xfs_vm_writepage. The buffer loop now first checks the type of buffer and checks/sets the ioend type, or continues to the next buffer if it's not interesting to us. Only after that we validate the iomap and perform the block mapping if needed, all in common code for the cases where we have to do work. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder commit 2fa24f92530edaf86c3b5f662464e0d2e3b3e517 Author: Christoph Hellwig Date: Fri Dec 10 08:42:23 2010 +0000 xfs: remove the all_bh flag from xfs_convert_page The all_bh flag is always set when entering the page clustering machinery with a regular written extent, which means the check for it is superflous. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder commit ed1e7b7e484dfb64168755613d499f32a97409bd Author: Christoph Hellwig Date: Fri Dec 10 08:42:22 2010 +0000 xfs: remove xfs_probe_cluster xfs_map_blocks always calls xfs_bmapi with the XFS_BMAPI_ENTIRE entire flag, which tells it to not cap the extent at the passed in size, but just treat the size as an minimum to map. This means xfs_probe_cluster is entirely useless as we'll always get the whole extent back anyway. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder commit 8ff2957d581582890693affc09920108a67cb05d Author: Christoph Hellwig Date: Fri Dec 10 08:42:21 2010 +0000 xfs: simplify xfs_map_blocks No need to lock the extent map exclusive when performing an overwrite, we know the extent map must already have been loaded by get_blocks. Apply the non-blocking inode semantics to all mapping types instead of just delayed allocations. Remove the handling of not yet allocated blocks for the IO_UNWRITTEN case - if an extent is marked as unwritten allocated in the buffer it must already have an extent on disk. Add asserts to verify all the assumptions above in debug builds. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder commit a206c817c864583c44e2f418db8e6c7a000fbc38 Author: Christoph Hellwig Date: Fri Dec 10 08:42:20 2010 +0000 xfs: kill xfs_iomap Opencode the xfs_iomap code in it's two callers. The overlap of passed flags already was minimal and will be further reduced in the next patch. As a side effect the BMAPI_* flags for xfs_bmapi and the IO_* flags for I/O end processing are merged into a single set of flags, which should be a bit more descriptive of the operation we perform. Also improve the tracing by giving each caller it's own type set of tracepoints. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder commit 405f80429436d38ab4e6b4c0d99861a1f00648fd Author: Christoph Hellwig Date: Fri Dec 10 08:42:19 2010 +0000 xfs: cleanup the xfs_iomap_write_* helpers Remove passing the BMAPI_* flags to these helpers, in xfs_iomap_write_direct the check BMAPI_DIRECT was always true, and in the xfs_iomap_write_delay path is was never checked at all. Remove the nmap return value as we never make use of it. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder commit 6ac7248ec5f20cb44a063d7c7191b8e0068b5a28 Author: Christoph Hellwig Date: Fri Dec 10 08:42:18 2010 +0000 xfs: a few small tweaks for overwrites in xfs_vm_writepage Don't trylock the buffer. We are the only one ever locking it for a regular file address space, and trylock was only copied from the generic code which did it due to the old buffer based writeout in jbd. Also make sure to only write out the buffer if the iomap actually is valid, because we wouldn't have a proper mapping otherwise. In practice we will never get an invalid mapping here as the page lock guarantees truncate doesn't race with us, but better be safe than sorry. Also make sure we allocate a new ioend when crossing boundaries between mappings, just like we do for delalloc and unwritten extents. Again this currently doesn't matter as the I/O end handler only cares for the boundaries for unwritten extents, but this makes the code fully correct and the same as for delalloc/unwritten extents. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder commit 221cb2517e8fc9a1d67c7a8a9c19fc5a916b583f Author: Christoph Hellwig Date: Fri Dec 10 08:42:17 2010 +0000 xfs: remove some dead bio handling code We'll never have BIO_EOPNOTSUPP set after calling submit_bio as this can only happen for discards, and used to happen for barriers, none of which is every submitted by xfs_submit_ioend_bio. Also remove the loop around bio_alloc as it will never fail due to it's mempool backing. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder commit 85da94c6b4666582c38579ccdcd90a5d9b5697ef Author: Christoph Hellwig Date: Fri Dec 10 08:42:16 2010 +0000 xfs: improve mapping type check in xfs_vm_writepage Currently we only refuse a "read-only" mapping for writing out unwritten and delayed buffers, and refuse any other for overwrites. Improve the checks to require delalloc mappings for delayed buffers, and unwritten extent mappings for unwritten extents. Signed-off-by: Christoph Hellwig Reviewed-by: Dave Chinner Signed-off-by: Alex Elder commit c9f71f5fc4390ea3a8087c00d53a799e7e0f0f8e Author: Christoph Hellwig Date: Wed Dec 1 22:06:24 2010 +0000 xfs: untangle phase1 vs phase2 recovery helpers Dispatch to a different helper for phase1 vs phase2 in xlog_recover_commit_trans instead of doing it in all the low-level functions. Signed-off-by: Christoph Hellwig Signed-off-by: Alex Elder commit d0450948641b2090b5d467ba638bbebd40b20b21 Author: Christoph Hellwig Date: Wed Dec 1 22:06:23 2010 +0000 xfs: refactor xlog_recover_commit_trans Merge the call to xlog_recover_reorder_trans and the loop over the recovery items from xlog_recover_do_trans into xlog_recover_commit_trans, and keep the switch statement over the log item types as a separate helper. Signed-off-by: Christoph Hellwig Signed-off-by: Alex Elder commit d5689eaa0ac5588cf459ee32f86d5700dd7d6403 Author: Christoph Hellwig Date: Wed Dec 1 22:06:22 2010 +0000 xfs: use struct list_head for the buf cancel table Signed-off-by: Christoph Hellwig Signed-off-by: Alex Elder commit e2714bf8d5c8e131a6df6b0ea2269433e9a03a9b Author: Christoph Hellwig Date: Wed Dec 1 22:06:21 2010 +0000 xfs: remove leftovers of old buffer log items in recovery code XFS used to support different types of buffer log items long time ago. Remove the switch statements checking the log item type in various buffer recovery helpers that were left over from those days and the rather useless xlog_recover_do_buffer_pass2 wrapper. Signed-off-by: Christoph Hellwig Signed-off-by: Alex Elder commit 576ecb8e2b725726471cc62b12c01e28d33127ba Author: Samuel Kvasnica Date: Fri Nov 19 13:38:49 2010 +0000 xfs: fix exporting with left over 64-bit inodes We now support mounting and using filesystems with 64-bit inodes even when not mounted with the inode64 option (which now only controls if we allocate new inodes in that space or not). Make sure we always use large NFS file handles when exporting a filesystem that may contain 64-bit inodes. Note that this only affects newly generated file handles, any outstanding 32-bit file handle is still accepted. [hch: the comment and commit log are mine, the rest is from a patch snipplet from Samuel] Signed-off-by: Christoph Hellwig Signed-off-by: Alex Elder ----------------------------------------------------------------------- Summary of changes: fs/xfs/linux-2.6/xfs_aops.c | 425 ++++++++++++------------------ fs/xfs/linux-2.6/xfs_aops.h | 16 ++ fs/xfs/linux-2.6/xfs_export.c | 12 +- fs/xfs/linux-2.6/xfs_trace.h | 29 ++- fs/xfs/xfs_alloc.c | 351 ++++++++++--------------- fs/xfs/xfs_buf_item.h | 11 - fs/xfs/xfs_iomap.c | 149 +---------- fs/xfs/xfs_iomap.h | 27 +-- fs/xfs/xfs_log_priv.h | 6 +- fs/xfs/xfs_log_recover.c | 585 ++++++++++++++++------------------------- 10 files changed, 606 insertions(+), 1005 deletions(-) hooks/post-receive -- XFS development tree From npiggin@gmail.com Fri Dec 17 11:38:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_DKIM_INVALID autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBHHcUBm248408 for ; Fri, 17 Dec 2010 11:38:30 -0600 X-ASG-Debug-ID: 1292607624-774d000b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-wy0-f181.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DC8881CD949A for ; Fri, 17 Dec 2010 09:40:24 -0800 (PST) Received: from mail-wy0-f181.google.com (mail-wy0-f181.google.com [74.125.82.181]) by cuda.sgi.com with ESMTP id iNl6zYSZKKANI6aN for ; Fri, 17 Dec 2010 09:40:24 -0800 (PST) Received: by wyf22 with SMTP id 22so901160wyf.26 for ; Fri, 17 Dec 2010 09:40:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=Xf8HaQO76VA2q+Qsirn/wBu28Dva9RcBKOVkiC6KoS0=; b=PwU976w2owUoGx7hoJbMxWoYz4yjiG82hN8q9K23tB33hpke+nIPtr1i/VQe9bfNw6 /64X2dO8cvW3M5a34QxGl4S2Uze2lN41q0NA263qKo+CmuEWzNFqwrhq06Daq/VF1/1T uKwf6OYDiqGjgxFZcKeReuIBjUIjlX0zQuJ2Y= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=kQgB1v0JqPghZygMj/d/ozbVSsYi458U6ypllbEjeWKOlyOf/W1Io4UhqTr61xrTr8 ulLKyrQjK1O42s4PwQRGaigtxs2e+EjgDQqRCclJ15BEEJ5hWs7fG+Y3tyg1Y7KIyRjk v10o5CThGdfC3hxybeDq3ydzUgw06X0w2SuUk= MIME-Version: 1.0 Received: by 10.216.220.219 with SMTP id o69mr1426252wep.57.1292607623580; Fri, 17 Dec 2010 09:40:23 -0800 (PST) Received: by 10.216.21.84 with HTTP; Fri, 17 Dec 2010 09:40:23 -0800 (PST) Date: Sat, 18 Dec 2010 04:40:23 +1100 Message-ID: X-ASG-Orig-Subj: Another questionable lock order bug Subject: Another questionable lock order bug From: Nick Piggin To: xfs@oss.sgi.com, Dave Chinner Content-Type: text/plain; charset=ISO-8859-1 X-Barracuda-Connect: mail-wy0-f181.google.com[74.125.82.181] X-Barracuda-Start-Time: 1292607624 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49709 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean With the iprune_sem and iolock lock order warnings taken care of, lockdep soon after chokes on i_lock [ 716.364005] inconsistent {RECLAIM_FS-ON-R} -> {IN-RECLAIM_FS-W} usage. [ 716.364005] cp/8370 [HC0[0]:SC0[0]:HE1:SE1] takes: [ 716.364005] (&(&ip->i_lock)->mr_lock){++++-?}, at: [] xfs_ilock+0x8c/0x150 [xfs] [ 716.364005] {RECLAIM_FS-ON-R} state was registered at: [ 716.364005] [] mark_held_locks+0x6b/0xa0 [ 716.364005] [] lockdep_trace_alloc+0x91/0xd0 [ 716.364005] [] __kmalloc+0x5a/0x220 [ 716.364005] [] kmem_alloc+0x87/0xd0 [xfs] [ 716.364005] [] xfs_attr_shortform_list+0xfb/0x480 [xfs] [ 716.364005] [] xfs_attr_list_int+0xd8/0xe0 [xfs] [ 716.364005] [] xfs_vn_listxattr+0x7f/0x160 [xfs] [ 716.364005] [] vfs_listxattr+0x1f/0x30 [ 716.364005] [] listxattr+0x3f/0xf0 [ 716.364005] [] sys_flistxattr+0x44/0x70 [ 716.364005] [] system_call_fastpath+0x16/0x1b[ 716.364005] irq event stamp: 322521151 [ 716.364005] hardirqs last enabled at (322521151): [] mutex_trylock+0x11d/0x190 [ 716.364005] hardirqs last disabled at (322521150): [] mutex_trylock+0x3e/0x190 [ 716.364005] softirqs last enabled at (322518910): [] __do_softirq+0x16e/0x360 [ 716.364005] softirqs last disabled at (322518881): [] call_softirq+0x1c/0x50 [ 716.364005] [ 716.364005] other info that might help us debug this: [ 716.364005] 3 locks held by cp/8370: [ 716.364005] #0: (xfs_iolock_active){++++++}, at: [] xfs_ilock+0xa5/0x150 [xfs] [ 716.364005] #1: (shrinker_rwsem){++++..}, at: [] shrink_slab+0x38/0x190 [ 716.364005] #2: (&pag->pag_ici_reclaim_lock){+.+...}, at: [] xfs_reclaim_inodes_ag+ 0xa4/0x360 [xfs] [ 716.364005] [ 716.364005] stack backtrace: [ 716.364005] Pid: 8370, comm: cp Not tainted 2.6.37-rc6+ #116 [ 716.364005] Call Trace: [ 716.364005] [] print_usage_bug+0x170/0x180 [ 716.364005] [] mark_lock+0x211/0x400 [ 716.364005] [] __lock_acquire+0x40e/0x1490 [ 716.364005] [] lock_acquire+0x95/0x1b0 [ 716.364005] [] ? xfs_ilock+0x8c/0x150 [xfs] [ 716.364005] [] ? rcu_read_lock_held+0x2c/0x30 [ 716.364005] [] down_write_nested+0x4a/0x70 [ 716.364005] [] ? xfs_ilock+0x8c/0x150 [xfs] [ 716.364005] [] xfs_ilock+0x8c/0x150 [xfs] [ 716.364005] [] xfs_reclaim_inode+0x36/0x270 [xfs] [ 716.364005] [] xfs_reclaim_inodes_ag+0x20f/0x360 [xfs] [ 716.364005] [] xfs_reclaim_inode_shrink+0x78/0x80 [xfs] [ 716.364005] [] shrink_slab+0x127/0x190 [ 716.364005] [] zone_reclaim+0x349/0x420 I assume this should be a false positive too, for the same reason, and could be handled the same way as iolock. Thanks, Nick From npiggin@gmail.com Fri Dec 17 12:02:48 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_DKIM_INVALID,T_TO_NO_BRKTS_FREEMAIL autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBHI2lhO250102 for ; Fri, 17 Dec 2010 12:02:48 -0600 X-ASG-Debug-ID: 1292609080-145b02b30000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-wy0-f181.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A0DA614611B7 for ; Fri, 17 Dec 2010 10:04:41 -0800 (PST) Received: from mail-wy0-f181.google.com (mail-wy0-f181.google.com [74.125.82.181]) by cuda.sgi.com with ESMTP id 7OHA2bcU8zE2CoMT for ; Fri, 17 Dec 2010 10:04:41 -0800 (PST) Received: by wyf22 with SMTP id 22so924888wyf.26 for ; Fri, 17 Dec 2010 10:04:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=vnhVuyxXyFl3S2tM8wiz0NQBoRs6iHU+sNfK8loVwGM=; b=fbGRmdAUm2NbZS6lK0lKbbr3MtVKdn7mMvl7i+lWQ4/UF0lMifrDtdGsKy8fai8O1i hryVY+Xd8XQxb0y0HvRWnjIXnOvviTU79mxTsXmf1g6q99YUoZPbodFQr7Hj5VepuU5V aGcwpieDdygIelxVxoDhOMlKY4UW7DV4B12Ek= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=YOToVi27zu6/4o/nIb2Ak/zpK2IwqP1Qx5GbbSxLZ1zLfPnZNwzA6Z3G6Z54e50qFQ YNt3Q7njMCoIWca2FAJ80utNY08rx2FANx/J3Y46ouvJxO5tfSd62jS6XIp4VKOTLcb4 BjWoT8VI/wTjfRDodSGTSukEvvRgHocgHqu4w= MIME-Version: 1.0 Received: by 10.216.155.75 with SMTP id i53mr1044987wek.27.1292609080577; Fri, 17 Dec 2010 10:04:40 -0800 (PST) Received: by 10.216.21.84 with HTTP; Fri, 17 Dec 2010 10:04:40 -0800 (PST) Date: Sat, 18 Dec 2010 05:04:40 +1100 Message-ID: X-ASG-Orig-Subj: xfs_efi_item slab leak Subject: xfs_efi_item slab leak From: Nick Piggin To: xfs@oss.sgi.com Content-Type: text/plain; charset=ISO-8859-1 X-Barracuda-Connect: mail-wy0-f181.google.com[74.125.82.181] X-Barracuda-Start-Time: 1292609082 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49710 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean After running xfstests and then unmounting and rmmodding xfs, I get this bug [ 3473.194517] ============================================================================= [ 3473.194697] BUG xfs_efi_item: Objects remaining on kmem_cache_close() [ 3473.194793] ----------------------------------------------------------------------------- [ 3473.194794] [ 3473.195056] INFO: Slab 0xffffea0006ad5e00 objects=35 used=2 fp=0xffff8801e8640e80 flags=0xc000000000004080 [ 3473.195201] Pid: 22011, comm: rmmod Not tainted 2.6.37-rc6+ #116 [ 3473.195201] Call Trace: [ 3473.195201] [] slab_err+0x91/0xa0 [ 3473.195201] [] ? __slab_alloc+0x138/0x480 [ 3473.195201] [] ? trace_hardirqs_off+0xd/0x10 [ 3473.195201] [] ? kmem_cache_destroy+0x154/0x3e0 [ 3473.195201] [] ? trace_hardirqs_off+0xd/0x10 [ 3473.195201] [] ? __kmalloc+0x104/0x220 [ 3473.195201] [] kmem_cache_destroy+0x177/0x3e0 [ 3473.195201] [] xfs_destroy_zones+0x37/0x100 [xfs] [ 3473.195201] [] exit_xfs_fs+0x33/0x3d [xfs] [ 3473.195201] [] sys_delete_module+0x17a/0x270 [ 3473.195201] [] ? lockdep_sys_exit_thunk+0x35/0x67 [ 3473.195201] [] system_call_fastpath+0x16/0x1b [ 3473.195201] INFO: Object 0xffff8801e8640910 @offset=2320 [ 3473.195201] INFO: Allocated in kmem_zone_alloc+0x8c/0xd0 [xfs] age=2263917 cpu=15 pid=4514 [ 3473.195201] INFO: Freed in xfs_efi_item_free+0x19/0x30 [xfs] age=2263918 cpu=15 pid=4514 [ 3473.195201] INFO: Object 0xffff8801e86427e0 @offset=10208 [ 3473.195201] INFO: Allocated in kmem_zone_alloc+0x8c/0xd0 [xfs] age=2103034 cpu=15 pid=22329 [ 3473.195201] INFO: Freed in xfs_efi_item_free+0x19/0x30 [xfs] age=2103034 cpu=15 pid=22329 [ 3473.197616] SLUB xfs_efi_item: kmem_cache_destroy called for cache that still has objects. [ 3473.197794] Pid: 22011, comm: rmmod Not tainted 2.6.37-rc6+ #116 [ 3473.197892] Call Trace: [ 3473.197980] [] kmem_cache_destroy+0x357/0x3e0 [ 3473.198120] [] xfs_destroy_zones+0x37/0x100 [xfs] [ 3473.198240] [] exit_xfs_fs+0x33/0x3d [xfs] [ 3473.198337] [] sys_delete_module+0x17a/0x270 [ 3473.198435] [] ? lockdep_sys_exit_thunk+0x35/0x67 [ 3473.198534] [] system_call_fastpath+0x16/0x1b From anpmmsskh@sohu.com Fri Dec 17 12:05:38 2010 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBHI5bbd250266 for ; Fri, 17 Dec 2010 12:05:38 -0600 X-ASG-Debug-ID: 1292609244-4fe200f20000-w1Z2WR X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from relay.mail.sohu.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3E3991FD509 for ; Fri, 17 Dec 2010 10:07:25 -0800 (PST) Received: from relay.mail.sohu.com (websmtp.sohu.com [61.135.132.132]) by cuda.sgi.com with ESMTP id x4GT6r83mMkTZ8Qk for ; Fri, 17 Dec 2010 10:07:25 -0800 (PST) Received: from rxuizuphd (unknown [183.38.87.196]) by relay.mail.sohu.com (Postfix) with ESMTPA id 77B0C6F8F35; Sat, 18 Dec 2010 02:06:46 +0800 (CST) Reply-To: Sender: anpmmsskh@sohu.com Message-ID: <3702138C9A111E243A5907D66F3CD432@rxuizuphd> From: "CHUN BAO" To: X-ASG-Orig-Subj: Supply dry porcini, dry shiitake, and dry champignons Subject: Supply dry porcini, dry shiitake, and dry champignons Date: Sat, 18 Dec 2010 02:02:52 +0800 MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_NextPart_000_044F_0116071A.196A1590" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5512 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5512 X-SOHU-Antispam-Bayes: 0 X-Barracuda-Connect: websmtp.sohu.com[61.135.132.132] X-Barracuda-Start-Time: 1292609252 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1001.00 X-Barracuda-Spam-Status: No, SCORE=-1001.00 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_044F_0116071A.196A1590 Content-Type: multipart/alternative; boundary="----=_NextPart_001_04E6_0116071A.196A1590" ------=_NextPart_001_04E6_0116071A.196A1590 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 RGVhciBTaXIvTGFkeSwNClRoaXMgaXMgRmVuZyBMaW4gd3JpdGluZyBmcm9tIENodW4gQmFvIEZv b2RzdHVmZnMgKFNoZW56aGVuKSBDby5MdGQgdG8gYXNrIHdoZXRoZXIgeW91IG5lZWQgZHJ5IGJv bGV0dXMgZWR1bGlzIGFuZCBvdGhlciBkcnkgbXVzaHJvb21zLg0KT3VyIGNvbXBhbnksIENodW5i YW8gRm9vZHN0dWZmcyAoU2hlbnpoZW4pIENvLkx0ZCwgaGFzIG91ciBvd24gZmFjdG9yaWVzIGFj cm9zcyB0aGUgbWFpbmxhbmQgb2YgQ2hpbmEuIEZyb20gaXRzIGZvdW5kYXRpb24gbW9yZSB0aGFu IDMwIHllYXJzIGFnbywgd2UgYXJlIHNwZWNpYWxpemVkIGluIHByb3ZpZGluZyBzZXJpZXMgb2Yg cXVhbGl0eSBkcmllZCBtdXNocm9vbSBwcm9kdWN0cywgd2hpY2ggYXJlIG1haW5seSBzb2xkIHRv 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required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBHNqJCq007121 for ; Fri, 17 Dec 2010 17:52:20 -0600 X-ASG-Debug-ID: 1292630051-2c6302560000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id EBDB91CDA97C for ; Fri, 17 Dec 2010 15:54:12 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id h9psjZX8zq7Lruzf for ; Fri, 17 Dec 2010 15:54:12 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 38885641-1927428 for multiple; Sat, 18 Dec 2010 10:24:10 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PTk7l-0003cz-26; Sat, 18 Dec 2010 10:54:09 +1100 Date: Sat, 18 Dec 2010 10:54:09 +1100 From: Dave Chinner To: Nick Piggin Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Another questionable lock order bug Subject: Re: Another questionable lock order bug Message-ID: <20101217235408.GF5193@dastard> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292630053 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49735 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Sat, Dec 18, 2010 at 04:40:23AM +1100, Nick Piggin wrote: > With the iprune_sem and iolock lock order warnings taken care of, > lockdep soon after chokes on i_lock What kernel are you running? It does not appear to be vanilla XFS, as: > [ 716.364005] inconsistent {RECLAIM_FS-ON-R} -> {IN-RECLAIM_FS-W} usage. > [ 716.364005] cp/8370 [HC0[0]:SC0[0]:HE1:SE1] takes: > [ 716.364005] (&(&ip->i_lock)->mr_lock){++++-?}, at: > [] xfs_ilock+0x8c/0x150 [xfs] > [ 716.364005] {RECLAIM_FS-ON-R} state was registered at: > [ 716.364005] [] mark_held_locks+0x6b/0xa0 > [ 716.364005] [] lockdep_trace_alloc+0x91/0xd0 > [ 716.364005] [] __kmalloc+0x5a/0x220 > [ 716.364005] [] kmem_alloc+0x87/0xd0 [xfs] > [ 716.364005] [] xfs_attr_shortform_list+0xfb/0x480 [xfs] > [ 716.364005] [] xfs_attr_list_int+0xd8/0xe0 [xfs] > [ 716.364005] [] xfs_vn_listxattr+0x7f/0x160 [xfs] > [ 716.364005] [] vfs_listxattr+0x1f/0x30 > [ 716.364005] [] listxattr+0x3f/0xf0 > [ 716.364005] [] sys_flistxattr+0x44/0x70 > [ 716.364005] [] system_call_fastpath+0x16/0x1b[ > 716.364005] irq event stamp: 322521151 > [ 716.364005] hardirqs last enabled at (322521151): > [] mutex_trylock+0x11d/0x190 > [ 716.364005] hardirqs last disabled at (322521150): > [] mutex_trylock+0x3e/0x190 > [ 716.364005] softirqs last enabled at (322518910): > [] __do_softirq+0x16e/0x360 > [ 716.364005] softirqs last disabled at (322518881): > [] call_softirq+0x1c/0x50 > [ 716.364005] > [ 716.364005] other info that might help us debug this: > [ 716.364005] 3 locks held by cp/8370: > [ 716.364005] #0: (xfs_iolock_active){++++++}, at: ^^^^^^^^^^^^^^^^^ This patch is not yet mainline. If you really want to do significant XFS scalability testing for .38, you should probably pull these branches in for testing: git://git.kernel.org/pub/scm/linux/dgc/xfsdev.git inode-scale git://git.kernel.org/pub/scm/linux/dgc/xfsdev.git xfs-for-2.6.38 > [] xfs_ilock+0xa5/0x150 [xfs] > [ 716.364005] #1: (shrinker_rwsem){++++..}, at: > [] shrink_slab+0x38/0x190 > [ 716.364005] #2: (&pag->pag_ici_reclaim_lock){+.+...}, at: > [] xfs_reclaim_inodes_ag+ > 0xa4/0x360 [xfs] > [ 716.364005] > [ 716.364005] stack backtrace: > [ 716.364005] Pid: 8370, comm: cp Not tainted 2.6.37-rc6+ #116 > [ 716.364005] Call Trace: > [ 716.364005] [] print_usage_bug+0x170/0x180 > [ 716.364005] [] mark_lock+0x211/0x400 > [ 716.364005] [] __lock_acquire+0x40e/0x1490 > [ 716.364005] [] lock_acquire+0x95/0x1b0 > [ 716.364005] [] ? xfs_ilock+0x8c/0x150 [xfs] > [ 716.364005] [] ? rcu_read_lock_held+0x2c/0x30 > [ 716.364005] [] down_write_nested+0x4a/0x70 > [ 716.364005] [] ? xfs_ilock+0x8c/0x150 [xfs] > [ 716.364005] [] xfs_ilock+0x8c/0x150 [xfs] > [ 716.364005] [] xfs_reclaim_inode+0x36/0x270 [xfs] > [ 716.364005] [] xfs_reclaim_inodes_ag+0x20f/0x360 [xfs] > [ 716.364005] [] xfs_reclaim_inode_shrink+0x78/0x80 [xfs] > [ 716.364005] [] shrink_slab+0x127/0x190 > [ 716.364005] [] zone_reclaim+0x349/0x420 > > I assume this should be a false positive too, for the same reason, > and could be handled the same way as iolock. The ilock is very different to the iolock in terms of usage - the ilock is required in the writeback path (for block mapping, allocation and file size updates) while the iolock is not. Hence this is indicative of a potential deadlock and we shouldn't be doing memory allocation with the ilock outside a transaction. Allocations inside transactions are transformed to GFP_NOFS so are safe against such lock recursion, but outside transactions we need to use KM_NOFS directly. I'll send out a patch on Monday after I've looked at the code in more detail.... Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+8/6Q+21+fromorbit.com=david@internode.on.net Fri Dec 17 18:02:09 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBI029GD007603 for ; Fri, 17 Dec 2010 18:02:09 -0600 X-ASG-Debug-ID: 1292630568-104e000f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D8C511FEEB0 for ; Fri, 17 Dec 2010 16:02:48 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id NQv2WLoZ5I5XdST1 for ; Fri, 17 Dec 2010 16:02:48 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50756559-1927428 for multiple; Sat, 18 Dec 2010 10:32:47 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PTkG6-0003e9-1F; Sat, 18 Dec 2010 11:02:46 +1100 Date: Sat, 18 Dec 2010 11:02:45 +1100 From: Dave Chinner To: Nick Piggin Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs_efi_item slab leak Subject: Re: xfs_efi_item slab leak Message-ID: <20101218000245.GG5193@dastard> References: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292630569 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49735 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Sat, Dec 18, 2010 at 05:04:40AM +1100, Nick Piggin wrote: > After running xfstests and then unmounting and rmmodding xfs, I get this bug > > [ 3473.194517] ============================================================================= > [ 3473.194697] BUG xfs_efi_item: Objects remaining on kmem_cache_close() > [ 3473.194793] ----------------------------------------------------------------------------- > [ 3473.194794] > [ 3473.195056] INFO: Slab 0xffffea0006ad5e00 objects=35 used=2 > fp=0xffff8801e8640e80 flags=0xc000000000004080 > [ 3473.195201] Pid: 22011, comm: rmmod Not tainted 2.6.37-rc6+ #116 > [ 3473.195201] Call Trace: > [ 3473.195201] [] slab_err+0x91/0xa0 > [ 3473.195201] [] ? __slab_alloc+0x138/0x480 > [ 3473.195201] [] ? trace_hardirqs_off+0xd/0x10 > [ 3473.195201] [] ? kmem_cache_destroy+0x154/0x3e0 > [ 3473.195201] [] ? trace_hardirqs_off+0xd/0x10 > [ 3473.195201] [] ? __kmalloc+0x104/0x220 > [ 3473.195201] [] kmem_cache_destroy+0x177/0x3e0 > [ 3473.195201] [] xfs_destroy_zones+0x37/0x100 [xfs] > [ 3473.195201] [] exit_xfs_fs+0x33/0x3d [xfs] > [ 3473.195201] [] sys_delete_module+0x17a/0x270 > [ 3473.195201] [] ? lockdep_sys_exit_thunk+0x35/0x67 > [ 3473.195201] [] system_call_fastpath+0x16/0x1b > [ 3473.195201] INFO: Object 0xffff8801e8640910 @offset=2320 > [ 3473.195201] INFO: Allocated in kmem_zone_alloc+0x8c/0xd0 [xfs] > age=2263917 cpu=15 pid=4514 > [ 3473.195201] INFO: Freed in xfs_efi_item_free+0x19/0x30 [xfs] > age=2263918 cpu=15 pid=4514 > [ 3473.195201] INFO: Object 0xffff8801e86427e0 @offset=10208 > [ 3473.195201] INFO: Allocated in kmem_zone_alloc+0x8c/0xd0 [xfs] > age=2103034 cpu=15 pid=22329 > [ 3473.195201] INFO: Freed in xfs_efi_item_free+0x19/0x30 [xfs] > age=2103034 cpu=15 pid=22329 > [ 3473.197616] SLUB xfs_efi_item: kmem_cache_destroy called for cache > that still has objects. > [ 3473.197794] Pid: 22011, comm: rmmod Not tainted 2.6.37-rc6+ #116 > [ 3473.197892] Call Trace: > [ 3473.197980] [] kmem_cache_destroy+0x357/0x3e0 > [ 3473.198120] [] xfs_destroy_zones+0x37/0x100 [xfs] > [ 3473.198240] [] exit_xfs_fs+0x33/0x3d [xfs] > [ 3473.198337] [] sys_delete_module+0x17a/0x270 > [ 3473.198435] [] ? lockdep_sys_exit_thunk+0x35/0x67 > [ 3473.198534] [] system_call_fastpath+0x16/0x1b Ok, after unmounting everything I can see two items in remaining in the xfs_efi_item cache after an xfstests run. Іt's probably to do with a filesystem shutdown not cleaning them up correctly. I'll put it on my list of stuff to track down. Cheers, Dave. -- Dave Chinner david@fromorbit.com From npiggin@gmail.com Fri Dec 17 20:03:13 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_DKIM_INVALID autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBI23Djp013939 for ; Fri, 17 Dec 2010 20:03:13 -0600 X-ASG-Debug-ID: 1292637906-3a2503a70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-wy0-f181.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8FE6A14653BB for ; Fri, 17 Dec 2010 18:05:06 -0800 (PST) Received: from mail-wy0-f181.google.com (mail-wy0-f181.google.com [74.125.82.181]) by cuda.sgi.com with ESMTP id 4wx52XqxBGMf47Sf for ; Fri, 17 Dec 2010 18:05:06 -0800 (PST) Received: by wyf22 with SMTP id 22so1291421wyf.26 for ; Fri, 17 Dec 2010 18:05:05 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type :content-transfer-encoding; bh=/p8qwKDjPzB9UXLc07Nwr7ySSpVPqEQI+LPmlG0L/Q8=; b=SNLLkrHxJYVFQzwufoe0eALe9juwOBW6oaBQuU4fntxfK08Qqk6Oo5ui29iZNYHLTZ yKVlfEru+ES8X19zV+W0Wu3HYnGQLMSFtctTXhK0QRzdSx4EE7UvHMt+1vhz5Jgxneql cP8U/1d/MKzjPfBXQLmwG1NAYZZwvmb84eYKE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type:content-transfer-encoding; b=SXZdf6s7mRCGjHleNxRLNUkt8E2BPPLV7RlSgWwctoP3f8mMjlp8IONP55hRlJVqOy u7wpte1uIw+42ysjo9FfnyNEkJ9rHMtN+1GdCu+x/UlDfuFzDdqrBQy4oVfnVWqnIfom s3jw2xuswPT+v+03Gj3ndHMTU5vUhngw1Q9oM= MIME-Version: 1.0 Received: by 10.216.155.75 with SMTP id i53mr1535021wek.27.1292637905805; Fri, 17 Dec 2010 18:05:05 -0800 (PST) Received: by 10.216.21.84 with HTTP; Fri, 17 Dec 2010 18:05:05 -0800 (PST) In-Reply-To: <20101217235408.GF5193@dastard> References: <20101217235408.GF5193@dastard> Date: Sat, 18 Dec 2010 13:05:05 +1100 Message-ID: X-ASG-Orig-Subj: Re: Another questionable lock order bug Subject: Re: Another questionable lock order bug From: Nick Piggin To: Dave Chinner Cc: xfs@oss.sgi.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: mail-wy0-f181.google.com[74.125.82.181] X-Barracuda-Start-Time: 1292637907 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49742 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Sat, Dec 18, 2010 at 10:54 AM, Dave Chinner wrote: > On Sat, Dec 18, 2010 at 04:40:23AM +1100, Nick Piggin wrote: >> With the iprune_sem and iolock lock order warnings taken care of, >> lockdep soon after chokes on i_lock > > What kernel are you running? It does not appear to be vanilla XFS, > as: It's just vanilla plus your patch to fix iolock and Christoph's iprune patc= h to fix that one -- lockdep doesn't get very far without them. >> [ =A0716.364005] inconsistent {RECLAIM_FS-ON-R} -> {IN-RECLAIM_FS-W} usa= ge. >> [ =A0716.364005] cp/8370 [HC0[0]:SC0[0]:HE1:SE1] takes: >> [ =A0716.364005] =A0(&(&ip->i_lock)->mr_lock){++++-?}, at: >> [] xfs_ilock+0x8c/0x150 [xfs] >> [ =A0716.364005] {RECLAIM_FS-ON-R} state was registered at: >> [ =A0716.364005] =A0 [] mark_held_locks+0x6b/0xa0 >> [ =A0716.364005] =A0 [] lockdep_trace_alloc+0x91/0xd0 >> [ =A0716.364005] =A0 [] __kmalloc+0x5a/0x220 >> [ =A0716.364005] =A0 [] kmem_alloc+0x87/0xd0 [xfs] >> [ =A0716.364005] =A0 [] xfs_attr_shortform_list+0xfb/0= x480 [xfs] >> [ =A0716.364005] =A0 [] xfs_attr_list_int+0xd8/0xe0 [x= fs] >> [ =A0716.364005] =A0 [] xfs_vn_listxattr+0x7f/0x160 [x= fs] >> [ =A0716.364005] =A0 [] vfs_listxattr+0x1f/0x30 >> [ =A0716.364005] =A0 [] listxattr+0x3f/0xf0 >> [ =A0716.364005] =A0 [] sys_flistxattr+0x44/0x70 >> [ =A0716.364005] =A0 [] system_call_fastpath+0x16/0x1b= [ >> 716.364005] irq event stamp: 322521151 >> [ =A0716.364005] hardirqs last =A0enabled at (322521151): >> [] mutex_trylock+0x11d/0x190 >> [ =A0716.364005] hardirqs last disabled at (322521150): >> [] mutex_trylock+0x3e/0x190 >> [ =A0716.364005] softirqs last =A0enabled at (322518910): >> [] __do_softirq+0x16e/0x360 >> [ =A0716.364005] softirqs last disabled at (322518881): >> [] call_softirq+0x1c/0x50 >> [ =A0716.364005] >> [ =A0716.364005] other info that might help us debug this: >> [ =A0716.364005] 3 locks held by cp/8370: >> [ =A0716.364005] =A0#0: =A0(xfs_iolock_active){++++++}, at: > =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0^^^^^^^^^^^^^^^^^ > > This patch is not yet mainline. If you really want to do significant > XFS scalability testing for .38, you should probably pull these branches > in for testing: > > git://git.kernel.org/pub/scm/linux/dgc/xfsdev.git inode-scale > git://git.kernel.org/pub/scm/linux/dgc/xfsdev.git xfs-for-2.6.38 OK I'll keep it in mind, however in this case I was stress testing some other patches which required that lockdep stay up. > >> [] xfs_ilock+0xa5/0x150 [xfs] >> [ =A0716.364005] =A0#1: =A0(shrinker_rwsem){++++..}, at: >> [] shrink_slab+0x38/0x190 >> [ =A0716.364005] =A0#2: =A0(&pag->pag_ici_reclaim_lock){+.+...}, at: >> [] xfs_reclaim_inodes_ag+ >> 0xa4/0x360 [xfs] >> [ =A0716.364005] >> [ =A0716.364005] stack backtrace: >> [ =A0716.364005] Pid: 8370, comm: cp Not tainted 2.6.37-rc6+ #116 >> [ =A0716.364005] Call Trace: >> [ =A0716.364005] =A0[] print_usage_bug+0x170/0x180 >> [ =A0716.364005] =A0[] mark_lock+0x211/0x400 >> [ =A0716.364005] =A0[] __lock_acquire+0x40e/0x1490 >> [ =A0716.364005] =A0[] lock_acquire+0x95/0x1b0 >> [ =A0716.364005] =A0[] ? xfs_ilock+0x8c/0x150 [xfs] >> [ =A0716.364005] =A0[] ? rcu_read_lock_held+0x2c/0x30 >> [ =A0716.364005] =A0[] down_write_nested+0x4a/0x70 >> [ =A0716.364005] =A0[] ? xfs_ilock+0x8c/0x150 [xfs] >> [ =A0716.364005] =A0[] xfs_ilock+0x8c/0x150 [xfs] >> [ =A0716.364005] =A0[] xfs_reclaim_inode+0x36/0x270 [x= fs] >> [ =A0716.364005] =A0[] xfs_reclaim_inodes_ag+0x20f/0x3= 60 [xfs] >> [ =A0716.364005] =A0[] xfs_reclaim_inode_shrink+0x78/0= x80 [xfs] >> [ =A0716.364005] =A0[] shrink_slab+0x127/0x190 >> [ =A0716.364005] =A0[] zone_reclaim+0x349/0x420 >> >> I assume this should be a false positive too, for the same reason, >> and could be handled the same way as iolock. > > The ilock is very different to the iolock in terms of usage - the > ilock is required in the writeback path (for block mapping, > allocation and file size updates) while the iolock is not. > > Hence this is indicative of a potential deadlock and we shouldn't > be doing memory allocation with the ilock outside a transaction. > Allocations inside transactions are transformed to GFP_NOFS so are > safe against such lock recursion, but outside transactions we need > to use KM_NOFS directly. I'll send out a patch on Monday after I've > looked at the code in more detail.. OK, good to know it uncovered a real problem. Thanks, Nick From xfs@pzystorm.de Sat Dec 18 05:24:16 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBIBOGZQ044796 for ; Sat, 18 Dec 2010 05:24:16 -0600 X-ASG-Debug-ID: 1292671570-305a02b20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.pzystorm.de (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 36865203F3C for ; Sat, 18 Dec 2010 03:26:10 -0800 (PST) Received: from mail.pzystorm.de (mail.pzystorm.de [188.40.193.4]) by cuda.sgi.com with ESMTP id IDINfOPWwHrKapg1 for ; Sat, 18 Dec 2010 03:26:10 -0800 (PST) Received: from 77-22-192-189-dynip.superkabel.de ([77.22.192.189] helo=[192.168.178.27]) by mail.pzystorm.de with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.69) (envelope-from ) id 1PTuvR-00079p-AC for xfs@oss.sgi.com; Sat, 18 Dec 2010 12:26:09 +0100 Message-ID: <4D0C9A4F.4040108@pzystorm.de> Date: Sat, 18 Dec 2010 12:26:07 +0100 From: Kevin Richter Reply-To: xfs@pzystorm.de MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Problem with XFS on USB 2TB HD Subject: Problem with XFS on USB 2TB HD Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: mail.pzystorm.de[188.40.193.4] X-Barracuda-Start-Time: 1292671571 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49781 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hi, I have an external USB 2TB harddisk with an XFS filesystem connected to a Debian Lenny with a 2.6.33.4 kernel. 5 days ago I backuped my data to this external drive. While this backup process the USB port got reset and now all the data on the xfs is lost. I cannot mount the filesystem anymore. home:/# mount /dev/mapper/backup /mnt/backup/ mount: wrong fs type, bad option, bad superblock on /dev/mapper/backup, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so home:/# mount -t xfs /dev/mapper/backup /mnt/backup/ mount: wrong fs type, bad option, bad superblock on /dev/mapper/backup, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so The XFS is in a LUKS volume, but the luksOpen works flawlessly (cryptsetup luksOpen /dev/sdb4 backup). The syslog at the time of the backup process: Dec 13 22:34:26 home kernel: usb 1-5: reset high speed USB device using ehci_hcd and address 5 Dec 13 22:34:37 home kernel: usb 1-5: reset high speed USB device using ehci_hcd and address 5 Dec 13 22:35:15 home kernel: d2fd1000: c2 5b ed 04 29 c1 19 04 dd 51 f8 84 5c ca 33 79 .[..)....Q..\.3y Dec 13 22:35:15 home kernel: Filesystem "dm-0": XFS internal error xfs_da_do_buf(2) at line 2113 of file fs/xfs/xfs_da_btree.c. Caller 0xc115d3cf Dec 13 22:35:15 home kernel: Dec 13 22:35:15 home kernel: Pid: 30113, comm: smbd Not tainted 2.6.33.4 #4 Dec 13 22:35:15 home kernel: Call Trace: Dec 13 22:35:15 home kernel: [] xfs_error_report+0x2c/0x2e Dec 13 22:35:15 home kernel: [] xfs_corruption_error+0x35/0x40 Dec 13 22:35:15 home kernel: [] ? xfs_da_read_buf+0x18/0x1d Dec 13 22:35:15 home kernel: [] xfs_da_do_buf+0x571/0x629 Dec 13 22:35:15 home kernel: [] ? xfs_da_read_buf+0x18/0x1d Dec 13 22:35:15 home kernel: [] ? ip_output+0x78/0x7d Dec 13 22:35:15 home kernel: [] ? ip_queue_xmit+0x2ce/0x304 Dec 13 22:35:15 home kernel: [] xfs_da_read_buf+0x18/0x1d Dec 13 22:35:15 home kernel: [] ? xfs_dir2_block_lookup_int+0x39/0x17c Dec 13 22:35:15 home kernel: [] xfs_dir2_block_lookup_int+0x39/0x17c Dec 13 22:35:15 home kernel: [] ? __ext3_get_inode_loc+0xc6/0x260 Dec 13 22:35:15 home kernel: [] ? xfs_bmap_last_offset+0xe8/0xfc Dec 13 22:35:15 home kernel: [] xfs_dir2_block_lookup+0x16/0xa2 Dec 13 22:35:15 home kernel: [] xfs_dir_lookup+0x98/0x100 Dec 13 22:35:15 home kernel: [] xfs_lookup+0x3d/0x94 Dec 13 22:35:15 home kernel: [] xfs_vn_lookup+0x38/0x70 Dec 13 22:35:15 home kernel: [] do_lookup+0xd0/0x16f Dec 13 22:35:15 home kernel: [] link_path_walk+0x63b/0x9dc Dec 13 22:35:15 home kernel: [] path_walk+0x50/0xb2 Dec 13 22:35:15 home kernel: [] do_path_lookup+0x21/0x42 Dec 13 22:35:15 home kernel: [] user_path_at+0x3c/0x67 Dec 13 22:35:15 home kernel: [] vfs_fstatat+0x2d/0x54 Dec 13 22:35:15 home kernel: [] vfs_stat+0x13/0x15 Dec 13 22:35:15 home kernel: [] sys_stat64+0x14/0x28 Dec 13 22:35:15 home kernel: [] sysenter_do_call+0x12/0x26 The current XFS header bytes of the /dev/mapper/backup volume: 00000000 58 46 53 42 00 00 10 00 00 00 00 00 1c d8 c3 a4 |XFSB.........Øä| 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000020 ec 24 29 ae 9c 2f 4a 75 a8 59 58 14 b5 2d 5e ac |ì$)®./Ju¨YX.µ-^¬| 00000030 00 00 00 00 10 00 00 04 00 00 00 00 00 00 00 80 |................| 00000040 98 55 e4 53 ef e6 e9 03 9a 71 4f 19 3f 8b 6f 14 |.UäSïæé..qO.?.o.| 00000050 75 d6 51 9a dd 84 53 3e c4 80 ae a1 c2 83 53 5e |uÖQ.Ã.S>Ä.®¡Â.S^| 00000060 69 c3 f8 1b 35 0b 15 f2 4f 15 46 42 79 6f 8b 13 |iÃø.5..òO.FByo..| 00000070 4c 65 64 ba 38 cd 51 8b 00 00 00 00 2c f9 ac 2c |Ledº8ÃQ.....,ù¬,| 00000080 47 91 80 45 73 3e 93 77 8f 95 80 81 ab 8b b8 eb |G..Es>.w....«.¸ë| 00000090 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000000a0 ec 24 29 ae 9c 2f 4a 75 a8 59 58 14 b5 2d 5e ac |ì$)®./Ju¨YX.µ-^¬| 000000b0 00 00 00 00 10 00 00 04 00 00 00 00 00 00 00 80 |................| 000000c0 98 55 e4 53 ef e6 e9 03 9a 71 4f 19 3f 8b 6f 14 |.UäSïæé..qO.?.o.| 000000d0 75 d6 51 9a dd 84 53 3e c4 80 ae a1 c2 83 53 5e |uÖQ.Ã.S>Ä.®¡Â.S^| 000000e0 69 c3 f8 1b 35 0b 15 f2 4f 15 46 42 79 6f 8b 13 |iÃø.5..òO.FByo..| 000000f0 4c 65 64 ba 38 cd 51 8b 00 00 00 00 2c f9 ac 2c |Ledº8ÃQ.....,ù¬,| 00000100 47 91 80 45 73 3e 93 77 8f 95 80 81 ab 8b b8 eb |G..Es>.w....«.¸ë| 00000110 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 00000120 ec 24 29 ae 9c 2f 4a 75 a8 59 58 14 b5 2d 5e ac |ì$)®./Ju¨YX.µ-^¬| 00000130 00 00 00 00 10 00 00 04 00 00 00 00 00 00 00 80 |................| 00000140 98 55 e4 53 ef e6 e9 03 9a 71 4f 19 3f 8b 6f 14 |.UäSïæé..qO.?.o.| 00000150 75 d6 51 9a dd 84 53 3e c4 80 ae a1 c2 83 53 5e |uÖQ.Ã.S>Ä.®¡Â.S^| 00000160 69 c3 f8 1b 35 0b 15 f2 4f 15 46 42 79 6f 8b 13 |iÃø.5..òO.FByo..| 00000170 4c 65 64 ba 38 cd 51 8b 00 00 00 00 2c f9 ac 2c |Ledº8ÃQ.....,ù¬,| 00000180 47 91 80 45 73 3e 93 77 8f 95 80 81 ab 8b b8 eb |G..Es>.w....«.¸ë| 00000190 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| 000001a0 ec 24 29 ae 9c 2f 4a 75 a8 59 58 14 b5 2d 5e ac |ì$)®./Ju¨YX.µ-^¬| 000001b0 00 00 00 00 10 00 00 04 00 00 00 00 00 00 00 80 |................| 000001c0 98 55 e4 53 ef e6 e9 03 9a 71 4f 19 3f 8b 6f 14 |.UäSïæé..qO.?.o.| 000001d0 75 d6 51 9a dd 84 53 3e c4 80 ae a1 c2 83 53 5e |uÖQ.Ã.S>Ä.®¡Â.S^| 000001e0 69 c3 f8 1b 35 0b 15 f2 4f 15 46 42 79 6f 8b 13 |iÃø.5..òO.FByo..| 000001f0 4c 65 64 ba 38 cd 51 8b 00 00 00 00 2c f9 ac 2c |Ledº8ÃQ.....,ù¬,| xfs_repair runs since a few hours, but has just printed a bunch of dots. The first line of xfs_repair is "bad or unsupported version" and that it cant find a superblock. Some ideas? What happened? Do I use a buggy version? I have 2.9.8 (http://packages.debian.org/lenny/xfsprogs) What can I do to avoid these problems in the future? It is a problem with the interaction of LUKS, XFS and USB? 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Together in Success, Melissa Removal link: http://www.romamoney.co.cc/u.php?un=dvg1&e=xfs@oss.sgi.com From xfs@pzystorm.de Sat Dec 18 20:02:33 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=0.1 required=5.0 tests=BAYES_00,LONGWORDS autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBJ22XQP138861 for ; Sat, 18 Dec 2010 20:02:33 -0600 X-ASG-Debug-ID: 1292724267-1a6d00e90000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.pzystorm.de (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 828F31CDCA2F for ; Sat, 18 Dec 2010 18:04:27 -0800 (PST) Received: from mail.pzystorm.de (mail.pzystorm.de [188.40.193.4]) by cuda.sgi.com with ESMTP id tOWyz3FXVzZp4cH0 for ; Sat, 18 Dec 2010 18:04:27 -0800 (PST) Received: from hnvr-4d078b75.pool.mediaways.net ([77.7.139.117] helo=[192.168.0.72]) by mail.pzystorm.de with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.69) (envelope-from ) id 1PU8dO-0007Sy-Kf for xfs@oss.sgi.com; Sun, 19 Dec 2010 03:04:26 +0100 Message-ID: <4D0D6825.9010209@pzystorm.de> Date: Sun, 19 Dec 2010 03:04:21 +0100 From: Kevin Richter Reply-To: xfs@pzystorm.de MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Problem with XFS on USB 2TB HD Subject: Re: Problem with XFS on USB 2TB HD References: <4D0C9A4F.4040108@pzystorm.de> In-Reply-To: <4D0C9A4F.4040108@pzystorm.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: mail.pzystorm.de[188.40.193.4] X-Barracuda-Start-Time: 1292724268 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: 1.18 X-Barracuda-Spam-Status: No, SCORE=1.18 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=LONGWORDS, LONGWORDS_2 X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49839 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 LONGWORDS Long string of long words 3.20 LONGWORDS_2 Long string of long words X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean ... the xfs_repair process did succeed. But in the end I still cannot mount the volume. In the following there is a log of my actions with the appropriate syslog messages. The xfs_check (see below) says that there is a bug in xfs. So I am writing to this list a second time asking for help :) Thanks, Kevin [xfs_repair: after 500 screens of dots...] .................................................................found candidate secondary superblock... verified secondary superblock... writing modified primary superblock sb realtime bitmap inode 18446744073709551615 (NULLFSINO) inconsistent with calculated value 129 resetting superblock realtime bitmap ino pointer to 129 sb realtime summary inode 18446744073709551615 (NULLFSINO) inconsistent with calculated value 130 resetting superblock realtime summary ino pointer to 130 Phase 2 - using internal log - zero log... ERROR: The filesystem has valuable metadata changes in a log which needs to be replayed. Mount the filesystem to replay the log, and unmount it before re-running xfs_repair. If you are unable to mount the filesystem, then use the -L option to destroy the log and attempt a repair. Note that destroying the log may cause corruption -- please attempt a mount of the filesystem before doing this. home:/# mount -t xfs /dev/mapper/backup /mnt/backup/ mount: Nicht genügend Hauptspeicher verfügbar (engl. out of memory) syslog: Dec 18 21:53:25 home kernel: XFS mounting filesystem dm-0 Dec 18 21:53:26 home kernel: XFS: nil uuid in log - IRIX style log Dec 18 21:53:26 home kernel: Starting XFS recovery on filesystem: dm-0 (logdev: internal) Dec 18 21:53:26 home kernel: XFS: Invalid block length (0x16d283) given for buffer Dec 18 21:53:26 home kernel: XFS: log mount/recovery failed: error 12 Dec 18 21:53:26 home kernel: XFS: log mount failed home:/# mount -t xfs /dev/mapper/backup /mnt/backup/ mount: Die Struktur muss bereinigt werden (engl. structure needs cleaning) syslog: Dec 18 21:53:40 home kernel: XFS mounting filesystem dm-0 Dec 18 21:53:40 home kernel: XFS: nil uuid in log - IRIX style log Dec 18 21:53:40 home kernel: Starting XFS recovery on filesystem: dm-0 (logdev: internal) Dec 18 21:53:40 home kernel: XFS: dirty log written in incompatible format - can't recover Dec 18 21:53:40 home kernel: XFS: log mount/recovery failed: error 5 Dec 18 21:53:40 home kernel: XFS: log mount failed home:/# mount -t xfs /dev/mapper/backup /mnt/backup/ mount: /dev/mapper/backup: can't read superblock syslog: Dec 18 21:55:40 home kernel: XFS mounting filesystem dm-0 Dec 18 21:55:41 home kernel: XFS: nil uuid in log - IRIX style log Dec 18 21:55:41 home kernel: Starting XFS recovery on filesystem: dm-0 (logdev: internal) Dec 18 21:55:41 home kernel: Filesystem "dm-0": corrupt inode 128 ((a)extents = 316629094). Unmount and run xfs_repair. Dec 18 21:55:41 home kernel: c77f9000: 49 4e 41 ed 02 02 00 00 00 00 00 00 00 00 00 00 INA............. Dec 18 21:55:41 home kernel: Filesystem "dm-0": XFS internal error xfs_iformat_extents(1) at line 558 of file fs/xfs/xfs_inode.c. Caller 0xc116f10b Dec 18 21:55:41 home kernel: Dec 18 21:55:41 home kernel: Pid: 23696, comm: mount Not tainted 2.6.33.4 #4 Dec 18 21:55:41 home kernel: Call Trace: Dec 18 21:55:41 home kernel: [] xfs_error_report+0x2c/0x2e Dec 18 21:55:41 home kernel: [] xfs_corruption_error+0x35/0x40 Dec 18 21:55:41 home kernel: [] ? xfs_iformat+0x314/0x499 Dec 18 21:55:41 home kernel: [] xfs_iformat_extents+0xba/0x1bc Dec 18 21:55:41 home kernel: [] ? xfs_iformat+0x314/0x499 Dec 18 21:55:41 home kernel: [] xfs_iformat+0x314/0x499 Dec 18 21:55:41 home kernel: [] xfs_iread+0xa3/0x160 Dec 18 21:55:41 home kernel: [] xfs_iget+0x1a6/0x2b7 Dec 18 21:55:41 home kernel: [] xfs_mountfs+0x35e/0x594 Dec 18 21:55:41 home kernel: [] ? kmem_alloc+0x59/0xab Dec 18 21:55:41 home kernel: [] ? kmem_zalloc+0x10/0x25 Dec 18 21:55:41 home kernel: [] ? xfs_mru_cache_create+0xe9/0x121 Dec 18 21:55:41 home kernel: [] xfs_fs_fill_super+0x14e/0x292 Dec 18 21:55:41 home kernel: [] get_sb_bdev+0xf9/0x137 Dec 18 21:55:41 home kernel: [] ? kstrdup+0x29/0x3a Dec 18 21:55:41 home kernel: [] xfs_fs_get_sb+0x13/0x15 Dec 18 21:55:41 home kernel: [] ? xfs_fs_fill_super+0x0/0x292 Dec 18 21:55:41 home kernel: [] vfs_kern_mount+0x86/0x11f Dec 18 21:55:41 home kernel: [] do_kern_mount+0x32/0xbe Dec 18 21:55:41 home kernel: [] do_mount+0x5a9/0x5fb Dec 18 21:55:41 home kernel: [] ? strndup_user+0x48/0x67 Dec 18 21:55:41 home kernel: [] sys_mount+0x61/0x94 Dec 18 21:55:41 home kernel: [] sysenter_do_call+0x12/0x26 Dec 18 21:55:41 home kernel: XFS: failed to read root inode # SWAP SPACE ADDED: Dec 19 02:32:26 home kernel: Adding 7815612k swap on /dev/sda2. Priority:-2 extents:1 across:7815612k xfs_repair executed home:/# mount -t xfs /dev/mapper/backup /mnt/backup/ mount: Die Struktur muss bereinigt werden (engl. structure needs cleaning) syslog: Dec 19 02:33:23 home kernel: XFS mounting filesystem dm-0 Dec 19 02:33:24 home kernel: Starting XFS recovery on filesystem: dm-0 (logdev: internal) Dec 19 02:33:24 home kernel: Filesystem "dm-0": corrupt inode 128 ((a)extents = 316629094). Unmount and run xfs_repair. Dec 19 02:33:24 home kernel: d21fb000: 49 4e 41 ed 02 02 00 00 00 00 00 00 00 00 00 00 INA............. Dec 19 02:33:24 home kernel: Filesystem "dm-0": XFS internal error xfs_iformat_extents(1) at line 558 of file fs/xfs/xfs_inode.c. Caller 0xc116f10b Dec 19 02:33:24 home kernel: Dec 19 02:33:24 home kernel: Pid: 24735, comm: mount Not tainted 2.6.33.4 #4 Dec 19 02:33:24 home kernel: Call Trace: Dec 19 02:33:24 home kernel: [] xfs_error_report+0x2c/0x2e Dec 19 02:33:24 home kernel: [] xfs_corruption_error+0x35/0x40 Dec 19 02:33:24 home kernel: [] ? xfs_iformat+0x314/0x499 Dec 19 02:33:24 home kernel: [] xfs_iformat_extents+0xba/0x1bc Dec 19 02:33:24 home kernel: [] ? xfs_iformat+0x314/0x499 Dec 19 02:33:24 home kernel: [] xfs_iformat+0x314/0x499 Dec 19 02:33:24 home kernel: [] xfs_iread+0xa3/0x160 Dec 19 02:33:24 home kernel: [] xfs_iget+0x1a6/0x2b7 Dec 19 02:33:24 home kernel: [] xfs_mountfs+0x35e/0x594 Dec 19 02:33:24 home kernel: [] ? kmem_alloc+0x59/0xab Dec 19 02:33:24 home kernel: [] ? kmem_zalloc+0x10/0x25 Dec 19 02:33:24 home kernel: [] ? xfs_mru_cache_create+0xe9/0x121 Dec 19 02:33:24 home kernel: [] xfs_fs_fill_super+0x14e/0x292 Dec 19 02:33:24 home kernel: [] get_sb_bdev+0xf9/0x137 Dec 19 02:33:24 home kernel: [] ? kstrdup+0x29/0x3a Dec 19 02:33:24 home kernel: [] xfs_fs_get_sb+0x13/0x15 Dec 19 02:33:24 home kernel: [] ? xfs_fs_fill_super+0x0/0x292 Dec 19 02:33:24 home kernel: [] vfs_kern_mount+0x86/0x11f Dec 19 02:33:24 home kernel: [] do_kern_mount+0x32/0xbe Dec 19 02:33:24 home kernel: [] do_mount+0x5a9/0x5fb Dec 19 02:33:24 home kernel: [] ? strndup_user+0x48/0x67 Dec 19 02:33:24 home kernel: [] sys_mount+0x61/0x94 Dec 19 02:33:24 home kernel: [] sysenter_do_call+0x12/0x26 Dec 19 02:33:24 home kernel: XFS: failed to read root inode home:/# xfs_repair /dev/mapper/backup Phase 1 - find and verify superblock... sb realtime bitmap inode 18446744073709551615 (NULLFSINO) inconsistent with calculated value 129 resetting superblock realtime bitmap ino pointer to 129 sb realtime summary inode 18446744073709551615 (NULLFSINO) inconsistent with calculated value 130 resetting superblock realtime summary ino pointer to 130 Phase 2 - using internal log - zero log... ERROR: The filesystem has valuable metadata changes in a log which needs to be replayed. Mount the filesystem to replay the log, and unmount it before re-running xfs_repair. If you are unable to mount the filesystem, then use the -L option to destroy the log and attempt a repair. Note that destroying the log may cause corruption -- please attempt a mount of the filesystem before doing this. home:/# xfs_check /dev/mapper/backup corrupt inode 128 ((a)extents = 316629094). This is a bug. Please capture the filesystem metadata with xfs_metadump and report it to xfs@oss.sgi.com. cache_node_purge: refcount was 1, not zero (node=0x80dba08) xfs_check: cannot read root inode (117) ERROR: The filesystem has valuable metadata changes in a log which needs to be replayed. Mount the filesystem to replay the log, and unmount it before re-running xfs_check. If you are unable to mount the filesystem, then use the xfs_repair -L option to destroy the log and attempt a repair. Note that destroying the log may cause corruption -- please attempt a mount of the filesystem before doing this. From stan@hardwarefreak.com Sat Dec 18 20:35:40 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBJ2ZdfJ142982 for ; Sat, 18 Dec 2010 20:35:40 -0600 X-ASG-Debug-ID: 1292726253-7a9400a50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8F5D71466C68 for ; Sat, 18 Dec 2010 18:37:33 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id bfgBa6VobzDufjSR for ; Sat, 18 Dec 2010 18:37:33 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id E7D9B6C068 for ; Sat, 18 Dec 2010 20:37:32 -0600 (CST) Message-ID: <4D0D6FEC.70900@hardwarefreak.com> Date: Sat, 18 Dec 2010 20:37:32 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Problem with XFS on USB 2TB HD Subject: Re: Problem with XFS on USB 2TB HD References: <4D0C9A4F.4040108@pzystorm.de> <4D0D6825.9010209@pzystorm.de> In-Reply-To: <4D0D6825.9010209@pzystorm.de> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1292726255 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0523 1.0000 -1.6854 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.09 X-Barracuda-Spam-Status: No, SCORE=-1.09 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49842 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Kevin Richter put forth on 12/18/2010 8:04 PM: > ... the xfs_repair process did succeed. > But in the end I still cannot mount the volume. > In the following there is a log of my actions with the appropriate > syslog messages. > > The xfs_check (see below) says that there is a bug in xfs. So I am > writing to this list a second time asking for help :) I don't have a solution to your problem unfortunately. Keep in mind you posted this problem on a weekend, and one week before Christmas no less. Your timing is not optimal for receiving a prompt response. It's possible you may have to wait until Monday for help. :( -- Stan From lists@nabble.com Sun Dec 19 08:35:57 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBJEZvIo228290 for ; Sun, 19 Dec 2010 08:35:57 -0600 X-ASG-Debug-ID: 1292769466-7e1301370000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from sam.nabble.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 85CDC1CDD282 for ; Sun, 19 Dec 2010 06:37:47 -0800 (PST) Received: from sam.nabble.com (sam.nabble.com [216.139.236.26]) by cuda.sgi.com with ESMTP id C270PbBkab21QHCD for ; Sun, 19 Dec 2010 06:37:47 -0800 (PST) Received: from isper.nabble.com ([192.168.236.156]) by sam.nabble.com with esmtp (Exim 4.69) (envelope-from ) id 1PUKOQ-0001hs-Dt for xfs@oss.sgi.com; Sun, 19 Dec 2010 06:37:46 -0800 Message-ID: <30492876.post@talk.nabble.com> Date: Sun, 19 Dec 2010 06:37:46 -0800 (PST) From: johahoff To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Fwd: xfs - fixing wrong xfs size Subject: Re: Fwd: xfs - fixing wrong xfs size In-Reply-To: <4CE15F39.2010904@sandeen.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Nabble-From: jh@not-dark-yet.de References: <49E353FD.5060207@sandeen.net> <4BE1EF9D.2030901@sandeen.net> <30211747.post@talk.nabble.com> <4CE15F39.2010904@sandeen.net> X-Barracuda-Connect: sam.nabble.com[216.139.236.26] X-Barracuda-Start-Time: 1292769467 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49889 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean That worked perfectly, thanks a lot, Eric! One minor issue: I had to use 'xfs_db -x', not '-w', but probably that's because of an old version of xfs-utils on the SystemRescueCD I was using. Just a hint if anybody is wondering. Thanks again, Johannes -- View this message in context: http://old.nabble.com/xfs---fixing-wrong-xfs-size-tp23023562p30492876.html Sent from the Xfs - General mailing list archive at Nabble.com. From eflorac@intellique.com Sun Dec 19 08:55:21 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBJEtLg2230264 for ; Sun, 19 Dec 2010 08:55:21 -0600 X-ASG-Debug-ID: 1292770634-7307010a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp3-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B02C71467D3A for ; Sun, 19 Dec 2010 06:57:15 -0800 (PST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id aEmL1BSRm2VR16j5 for ; Sun, 19 Dec 2010 06:57:15 -0800 (PST) Received: from galadriel.home (unknown [82.235.234.79]) by smtp3-g21.free.fr (Postfix) with ESMTP id 9E299A611A; Sun, 19 Dec 2010 15:57:09 +0100 (CET) Date: Sun, 19 Dec 2010 15:57:03 +0100 From: Emmanuel Florac To: xfs@pzystorm.de Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Problem with XFS on USB 2TB HD Subject: Re: Problem with XFS on USB 2TB HD Message-ID: <20101219155703.0dba96ff@galadriel.home> In-Reply-To: <4D0D6825.9010209@pzystorm.de> References: <4D0C9A4F.4040108@pzystorm.de> <4D0D6825.9010209@pzystorm.de> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp3-g21.free.fr[212.27.42.3] X-Barracuda-Start-Time: 1292770637 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49890 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Sun, 19 Dec 2010 03:04:21 +0100 vous =C3=A9criviez: > ERROR: The filesystem has valuable metadata changes in a log which > needs to be replayed. Given this message, you'll have to run xfs_repair with the zero log option ( -L ). This is dangerous, but it can't get much worse anyway. Run xfs_repair -L /device , you should be able to mount your filesystem afterwards, however any data under change at the time of failure will most probably be lost. --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From sandeen@sandeen.net Sun Dec 19 11:26:06 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBJHQ5sT246787 for ; Sun, 19 Dec 2010 11:26:06 -0600 X-ASG-Debug-ID: 1292779680-3cde03540000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0C9EC1468315 for ; Sun, 19 Dec 2010 09:28:00 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id IRDwyeZ13uM7I6nh for ; Sun, 19 Dec 2010 09:28:00 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id 88C0148406ED; Sun, 19 Dec 2010 11:27:59 -0600 (CST) Message-ID: <4D0E409F.8060905@sandeen.net> Date: Sun, 19 Dec 2010 11:27:59 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: johahoff CC: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Fwd: xfs - fixing wrong xfs size Subject: Re: Fwd: xfs - fixing wrong xfs size References: <49E353FD.5060207@sandeen.net> <4BE1EF9D.2030901@sandeen.net> <30211747.post@talk.nabble.com> <4CE15F39.2010904@sandeen.net> <30492876.post@talk.nabble.com> In-Reply-To: <30492876.post@talk.nabble.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1292779682 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49900 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/19/10 8:37 AM, johahoff wrote: > > That worked perfectly, thanks a lot, Eric! > > One minor issue: I had to use 'xfs_db -x', not '-w', but probably that's > because of an old version of xfs-utils on the SystemRescueCD I was using. > Just a hint if anybody is wondering. Nah that was me misremembering debugfs vs. xfs_db arguments :) -Eric > Thanks again, > Johannes From sandeen@sandeen.net Sun Dec 19 11:28:45 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBJHSjMr246944 for ; Sun, 19 Dec 2010 11:28:45 -0600 X-ASG-Debug-ID: 1292779839-4ddf01bd0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B2F5C1468329 for ; Sun, 19 Dec 2010 09:30:40 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id gfLiOZ91LbopBCsI for ; Sun, 19 Dec 2010 09:30:40 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id 57E3F48BC887; Sun, 19 Dec 2010 11:30:39 -0600 (CST) Message-ID: <4D0E413F.50204@sandeen.net> Date: Sun, 19 Dec 2010 11:30:39 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: Emmanuel Florac CC: xfs@pzystorm.de, xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Problem with XFS on USB 2TB HD Subject: Re: Problem with XFS on USB 2TB HD References: <4D0C9A4F.4040108@pzystorm.de> <4D0D6825.9010209@pzystorm.de> <20101219155703.0dba96ff@galadriel.home> In-Reply-To: <20101219155703.0dba96ff@galadriel.home> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1292779841 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49900 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/19/10 8:57 AM, Emmanuel Florac wrote: > Le Sun, 19 Dec 2010 03:04:21 +0100 vous écriviez: > >> ERROR: The filesystem has valuable metadata changes in a log which >> needs to be replayed. > > Given this message, you'll have to run xfs_repair with the zero log > option ( -L ). This is dangerous, but it can't get much worse anyway. I agree with that approach. > Run xfs_repair -L /device , you should be able to mount your filesystem > afterwards, however any data under change at the time of failure will > most probably be lost. And something seems to have really whacked your filesystem; odds are the USB transport was lying to xfs one way or another about completed writes, and when it went away, things were not consistent on disk as expected. -Eric From SRS0++t02+23+fromorbit.com=david@internode.on.net Sun Dec 19 18:08:34 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBK08XYF026626 for ; Sun, 19 Dec 2010 18:08:34 -0600 X-ASG-Debug-ID: 1292803827-692000ed0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 912721466A1D for ; Sun, 19 Dec 2010 16:10:28 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id v0Yk8QFgv09urIPV for ; Sun, 19 Dec 2010 16:10:28 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50402467-1927428 for multiple; Mon, 20 Dec 2010 10:40:26 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PUTKb-00070p-1C; Mon, 20 Dec 2010 11:10:25 +1100 Date: Mon, 20 Dec 2010 11:10:24 +1100 From: Dave Chinner To: Kevin Richter Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Problem with XFS on USB 2TB HD Subject: Re: Problem with XFS on USB 2TB HD Message-ID: <20101220001024.GH5193@dastard> References: <4D0C9A4F.4040108@pzystorm.de> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <4D0C9A4F.4040108@pzystorm.de> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292803829 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49928 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Sat, Dec 18, 2010 at 12:26:07PM +0100, Kevin Richter wrote: > Hi, > > I have an external USB 2TB harddisk with an XFS filesystem connected to > a Debian Lenny with a 2.6.33.4 kernel. > > 5 days ago I backuped my data to this external drive. While this backup > process the USB port got reset and now all the data on the xfs is lost. There's been garbage written all over this superblock: > The current XFS header bytes of the /dev/mapper/backup volume: > 00000000 58 46 53 42 00 00 10 00 00 00 00 00 1c d8 c3 a4 |XFSB.........Øä| > 00000010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > 00000020 ec 24 29 ae 9c 2f 4a 75 a8 59 58 14 b5 2d 5e ac |ì$)®./Ju¨YX.µ-^¬| > 00000030 00 00 00 00 10 00 00 04 00 00 00 00 00 00 00 80 |................| Ok up to here (first 64 bytes) > 00000040 98 55 e4 53 ef e6 e9 03 9a 71 4f 19 3f 8b 6f 14 |.UäSïæé..qO.?.o.| > 00000050 75 d6 51 9a dd 84 53 3e c4 80 ae a1 c2 83 53 5e |uÖQ.Ý.S>Ä.®¡Â.S^| > 00000060 69 c3 f8 1b 35 0b 15 f2 4f 15 46 42 79 6f 8b 13 |iÃø.5..òO.FByo..| > 00000070 4c 65 64 ba 38 cd 51 8b 00 00 00 00 2c f9 ac 2c |Ledº8ÍQ.....,ù¬,| > 00000080 47 91 80 45 73 3e 93 77 8f 95 80 81 ab 8b b8 eb |G..Es>.w....«.¸ë| This is all garbage (second 64 bytes) > 00000090 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| Might be ok. > 000000a0 ec 24 29 ae 9c 2f 4a 75 a8 59 58 14 b5 2d 5e ac |ì$)®./Ju¨YX.µ-^¬| Garbage > 000000b0 00 00 00 00 10 00 00 04 00 00 00 00 00 00 00 80 |................| Might be ok > 000000c0 98 55 e4 53 ef e6 e9 03 9a 71 4f 19 3f 8b 6f 14 |.UäSïæé..qO.?.o.| > 000000d0 75 d6 51 9a dd 84 53 3e c4 80 ae a1 c2 83 53 5e |uÖQ.Ý.S>Ä.®¡Â.S^| > 000000e0 69 c3 f8 1b 35 0b 15 f2 4f 15 46 42 79 6f 8b 13 |iÃø.5..òO.FByo..| > 000000f0 4c 65 64 ba 38 cd 51 8b 00 00 00 00 2c f9 ac 2c |Ledº8ÍQ.....,ù¬,| > 00000100 47 91 80 45 73 3e 93 77 8f 95 80 81 ab 8b b8 eb |G..Es>.w....«.¸ë| Garbage. > 00000110 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > 00000120 ec 24 29 ae 9c 2f 4a 75 a8 59 58 14 b5 2d 5e ac |ì$)®./Ju¨YX.µ-^¬| > 00000130 00 00 00 00 10 00 00 04 00 00 00 00 00 00 00 80 |................| > 00000140 98 55 e4 53 ef e6 e9 03 9a 71 4f 19 3f 8b 6f 14 |.UäSïæé..qO.?.o.| > 00000150 75 d6 51 9a dd 84 53 3e c4 80 ae a1 c2 83 53 5e |uÖQ.Ý.S>Ä.®¡Â.S^| > 00000160 69 c3 f8 1b 35 0b 15 f2 4f 15 46 42 79 6f 8b 13 |iÃø.5..òO.FByo..| > 00000170 4c 65 64 ba 38 cd 51 8b 00 00 00 00 2c f9 ac 2c |Ledº8ÍQ.....,ù¬,| > 00000180 47 91 80 45 73 3e 93 77 8f 95 80 81 ab 8b b8 eb |G..Es>.w....«.¸ë| > 00000190 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................| > 000001a0 ec 24 29 ae 9c 2f 4a 75 a8 59 58 14 b5 2d 5e ac |ì$)®./Ju¨YX.µ-^¬| > 000001b0 00 00 00 00 10 00 00 04 00 00 00 00 00 00 00 80 |................| > 000001c0 98 55 e4 53 ef e6 e9 03 9a 71 4f 19 3f 8b 6f 14 |.UäSïæé..qO.?.o.| > 000001d0 75 d6 51 9a dd 84 53 3e c4 80 ae a1 c2 83 53 5e |uÖQ.Ý.S>Ä.®¡Â.S^| > 000001e0 69 c3 f8 1b 35 0b 15 f2 4f 15 46 42 79 6f 8b 13 |iÃø.5..òO.FByo..| > 000001f0 4c 65 64 ba 38 cd 51 8b 00 00 00 00 2c f9 ac 2c |Ledº8ÍQ.....,ù¬,| These should all be zero. Basically, whatever happened to cause the USB reset has resulted in corruption of various sectors of the hard drive. If you can't get your usb drive to work reliably, then don't expect the filesystem to stay intact. I'd start by replacing the USB cable and probably the enclosure, writing a pattern to the entire harddrive (e.g. 0xa5a55a5a) and verifying you can read it back without corruption or USB resets. If you can't get your USB drive to work reliably, then it's not a good medium for storing backups.... If that is fine, mkfs the filesystem on it and redo your backup again. > It is a problem with the interaction of LUKS, XFS and USB? You are encrypting the external drive? That would explain the garbage then - a single bit error in a sector will render it completely incorrect.... Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+FKRz+23+fromorbit.com=david@internode.on.net Sun Dec 19 18:58:18 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_21 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBK0wIKs031736 for ; Sun, 19 Dec 2010 18:58:18 -0600 X-ASG-Debug-ID: 1292806813-4b3900b50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2152A208953 for ; Sun, 19 Dec 2010 17:00:13 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id OKF2BwDNQ8HD2aCl for ; Sun, 19 Dec 2010 17:00:13 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 5205026-1927428 for multiple; Mon, 20 Dec 2010 11:30:12 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PUU6k-00074W-Li; Mon, 20 Dec 2010 12:00:10 +1100 Date: Mon, 20 Dec 2010 12:00:10 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 2/9] xfs: Pull EFI/EFD handling out from under the AIL lock Subject: Re: [PATCH 2/9] xfs: Pull EFI/EFD handling out from under the AIL lock Message-ID: <20101220010010.GI5193@dastard> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> <1292214743-18073-3-git-send-email-david@fromorbit.com> <20101217112254.GB12965@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101217112254.GB12965@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292806815 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49931 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, Dec 17, 2010 at 06:22:54AM -0500, Christoph Hellwig wrote: > Looks good, > > Reviewed-by: Christoph Hellwig > > Some minor comments below: > > > +STATIC void > > +__xfs_efi_release( > > + struct xfs_efi_log_item *efip) > > +{ > > + struct xfs_ail *ailp = efip->efi_item.li_ailp; > > + > > + if (!test_and_clear_bit(XFS_EFI_COMMITTED, &efip->efi_flags)) { > > + spin_lock(&ailp->xa_lock); > > + /* xfs_trans_ail_delete() drops the AIL lock. */ > > + xfs_trans_ail_delete(ailp, (xfs_log_item_t *)efip); > > The second argument should be &efip->efi_item to preserve ty;e safety. > > > void > > xfs_efi_release(xfs_efi_log_item_t *efip, > > uint nextents) > > { > > + ASSERT(atomic_read(&efip->efi_next_extent) >= nextents); > > + if (!atomic_sub_and_test(nextents, &efip->efi_next_extent)) > > + return; > > > > + __xfs_efi_release(efip); > > Why not just: > > if (atomic_sub_and_test(nextents, &efip->efi_next_extent)) > __xfs_efi_release(efip); > > ? Good idea. Fixed up. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0++t02+23+fromorbit.com=david@internode.on.net Sun Dec 19 19:04:53 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBK14q6U032214 for ; Sun, 19 Dec 2010 19:04:53 -0600 X-ASG-Debug-ID: 1292807207-696c02e50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3873514689B4 for ; Sun, 19 Dec 2010 17:06:47 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id mvAjNRHbkz1Jthtw for ; Sun, 19 Dec 2010 17:06:47 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50216831-1927428 for multiple; Mon, 20 Dec 2010 11:36:46 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PUUD5-000759-TZ; Mon, 20 Dec 2010 12:06:43 +1100 Date: Mon, 20 Dec 2010 12:06:43 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 8/9] xfs: use AIL bulk update function to implement single updates Subject: Re: [PATCH 8/9] xfs: use AIL bulk update function to implement single updates Message-ID: <20101220010643.GJ5193@dastard> References: <1292214743-18073-1-git-send-email-david@fromorbit.com> <1292214743-18073-9-git-send-email-david@fromorbit.com> <20101217141556.GA30830@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101217141556.GA30830@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail18.adl2.internode.on.net[150.101.137.103] X-Barracuda-Start-Time: 1292807209 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49932 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, Dec 17, 2010 at 09:15:56AM -0500, Christoph Hellwig wrote: > On Mon, Dec 13, 2010 at 03:32:22PM +1100, Dave Chinner wrote: > > From: Dave Chinner > > > > We now have two copies of AIL insert operations that are mostly > > duplicate functionality. The single log item updates can be > > implemented via the bulk updates by turning xfs_trans_ail_update() > > into a simple wrapper. This removes all the duplicate insert > > functionality and associated helpers. > > > Looks good, > > > Reviewed-by: Christoph Hellwig > > > + struct xfs_ail *ailp, > > +static inline void > > +xfs_trans_ail_update( > > + xfs_log_item_t *lip, > > + xfs_lsn_t lsn) __releases(ailp->xa_lock) > > +{ > > + struct xfs_log_item *log_items[1] = { lip, }; > > + > > + xfs_trans_ail_update_bulk(ailp, log_items, 1, lsn); > > This could be simplified down to: > > xfs_trans_ail_update_bulk(ailp, &lip, 1, lsn); > > at which point it could even become a macro. Yup, good point. Done. Cheers, Dave. -- Dave Chinner david@fromorbit.com From xfs@pzystorm.de Sun Dec 19 20:54:17 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_45 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBK2sGv9043454 for ; Sun, 19 Dec 2010 20:54:17 -0600 X-ASG-Debug-ID: 1292813772-4e3f03a00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.pzystorm.de (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 255A0208AF1 for ; Sun, 19 Dec 2010 18:56:12 -0800 (PST) Received: from mail.pzystorm.de (mail.pzystorm.de [188.40.193.4]) by cuda.sgi.com with ESMTP id kPpWkqZYGu79T65t for ; Sun, 19 Dec 2010 18:56:12 -0800 (PST) Received: from hnvr-4d07aad7.pool.mediaways.net ([77.7.170.215] helo=[192.168.0.72]) by mail.pzystorm.de with esmtpsa (TLS1.0:RSA_AES_256_CBC_SHA1:32) (Exim 4.69) (envelope-from ) id 1PUVuz-00088K-7g for xfs@oss.sgi.com; Mon, 20 Dec 2010 03:56:11 +0100 Message-ID: <4D0EC5C5.2070407@pzystorm.de> Date: Mon, 20 Dec 2010 03:56:05 +0100 From: Kevin Richter Reply-To: xfs@pzystorm.de MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Problem with XFS on USB 2TB HD Subject: Re: Problem with XFS on USB 2TB HD References: <4D0C9A4F.4040108@pzystorm.de> <20101220001024.GH5193@dastard> In-Reply-To: <20101220001024.GH5193@dastard> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mail.pzystorm.de[188.40.193.4] X-Barracuda-Start-Time: 1292813773 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49939 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Thanks a lot for your responses. > I don't have a solution to your problem unfortunately. Keep in mind you > posted this problem on a weekend, and one week before Christmas no less. > Your timing is not optimal for receiving a prompt response. It's > possible you may have to wait until Monday for help. :( No problem at all. It can wait. My backup drive has indeed no real important stuff on it - just 100% backups from other disks. I'd just use this issue as an opportunity to try out the xfs repair functionality. >> It is a problem with the interaction of LUKS, XFS and USB? > > You are encrypting the external drive? That would explain the > garbage then - a single bit error in a sector will render it > completely incorrect.... Yes, I do. aes-cbc-essiv:sha256 If the connection breaks while writing a block, only this block should be garbled? This should be 256 bit in this case, shouldn't it? >> ERROR: The filesystem has valuable metadata changes in a log which >> > needs to be replayed. > Given this message, you'll have to run xfs_repair with the zero log > option ( -L ). This is dangerous, but it can't get much worse anyway. > > Run xfs_repair -L /device , you should be able to mount your filesystem > afterwards, however any data under change at the time of failure will > most probably be lost. OK, if there is no way around... xfs_repair -L /dev/mapper/backup has run a few minutes and has printed a lot of screens. After lines like disconnected inode 4083355215, moving to lost+found disconnected dir inode 4083355216, moving to lost+found or Phase 7 - verify and correct link counts... resetting inode 128 nlinks from 2 to 3 ... b767c6f0: Badness in key lookup (length) bp=(bno 0, len 4096 bytes) key=(bno 0, len 512 bytes) done it has succeeded in this way, that it is now at least possible to mount the volume. But there is only the lost+found folder in there which contains again a lot of folders and files named with numbers. Looking deeper in these directories all the names of further files or directories are preserved. Phew! Only the fs structure in the first level seems to be garbled. Checking the size of the lost+found folder, (nearly) everything seems to be there. Now I am asking myself: If only one 256 bit block is garbled (f. ex. because of a terminated usb connection) all the directory and file names in the first level gets garbled? Wicked! Cheers, Kevin From SRS0++t02+23+fromorbit.com=david@internode.on.net Sun Dec 19 22:49:35 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_45 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBK4nY3l062018 for ; Sun, 19 Dec 2010 22:49:35 -0600 X-ASG-Debug-ID: 1292820688-500901990000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9E072204A5E for ; Sun, 19 Dec 2010 20:51:29 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id ry69NxKWpfXrWgMe for ; Sun, 19 Dec 2010 20:51:29 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50936491-1927428 for multiple; Mon, 20 Dec 2010 15:21:28 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PUXiY-0007Lp-3Z; Mon, 20 Dec 2010 15:51:26 +1100 Date: Mon, 20 Dec 2010 15:51:26 +1100 From: Dave Chinner To: Kevin Richter Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Problem with XFS on USB 2TB HD Subject: Re: Problem with XFS on USB 2TB HD Message-ID: <20101220045126.GK5193@dastard> References: <4D0C9A4F.4040108@pzystorm.de> <20101220001024.GH5193@dastard> <4D0EC5C5.2070407@pzystorm.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4D0EC5C5.2070407@pzystorm.de> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292820690 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49947 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 20, 2010 at 03:56:05AM +0100, Kevin Richter wrote: > Thanks a lot for your responses. > > > I don't have a solution to your problem unfortunately. Keep in mind you > > posted this problem on a weekend, and one week before Christmas no less. > > Your timing is not optimal for receiving a prompt response. It's > > possible you may have to wait until Monday for help. :( > > No problem at all. It can wait. My backup drive has indeed no real > important stuff on it - just 100% backups from other disks. > I'd just use this issue as an opportunity to try out the xfs repair > functionality. > > > >> It is a problem with the interaction of LUKS, XFS and USB? > > > > You are encrypting the external drive? That would explain the > > garbage then - a single bit error in a sector will render it > > completely incorrect.... > > Yes, I do. > aes-cbc-essiv:sha256 > If the connection breaks while writing a block, only this block should > be garbled? This should be 256 bit in this case, shouldn't it? Who knows how the encryption algorithm (sha256) is encrypting blocks. or what internal block size it is using. All I know is that the it has to ensure that sectors (512 bytes) are written and read atomically to/from the storage device. Hence, at minimum, it will be encoding individual sectors (512 bytes), so any single bit error in the sector will likely result in 512 bytes of garbage. > it has succeeded in this way, that it is now at least possible to mount > the volume. But there is only the lost+found folder in there which > contains again a lot of folders and files named with numbers. Looking > deeper in these directories all the names of further files or > directories are preserved. Phew! Only the fs structure in the first > level seems to be garbled. > > Checking the size of the lost+found folder, (nearly) everything seems to > be there. > > Now I am asking myself: If only one 256 bit block is garbled (f. ex. > because of a terminated usb connection) all the directory and file names > in the first level gets garbled? Wicked! That's because you had the misfortune of garbling the root directory inode along with the superblock. That's a very specific corruption, but if the corruption occurred a few blocks away in a data extent you wouldn't even know about it until you restore from backup and realised the file content in the backup are corrupted. Indeed - you should consider that entire backup as corrupted and redo it from scratch. FWIW, encryption makes any sort of corruption below the encrypted layer much, much worse as it turns things like single bit media errors into undecipherable, unrecoverable blocks of noise. No filesystem can recover from such corruption of an encrypted device. Hence if you had the same problem on ex3, ext4, JFS, etc you will end up with the same mess (or worse). Cheers, Dave. -- Dave Chinner david@fromorbit.com From michael.monnerie@is.it-management.at Mon Dec 20 02:57:59 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBK8vwp9099673 for ; Mon, 20 Dec 2010 02:57:58 -0600 X-ASG-Debug-ID: 1292835591-226203e30000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mailsrv14.zmi.at (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id EBBA0146A23A for ; Mon, 20 Dec 2010 00:59:51 -0800 (PST) Received: from mailsrv14.zmi.at (mailsrv1.zmi.at [212.69.164.54]) by cuda.sgi.com with ESMTP id gmmxLlvOMstYjzhd for ; Mon, 20 Dec 2010 00:59:51 -0800 (PST) Received: from mailsrv.i.zmi.at (h081217106033.dyn.cm.kabsi.at [81.217.106.33]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client CN "mailsrv2.i.zmi.at", Issuer "power4u.zmi.at" (not verified)) by mailsrv14.zmi.at (Postfix) with ESMTPSA id 10539602; Mon, 20 Dec 2010 09:59:50 +0100 (CET) Received: from saturn.localnet (saturn.i.zmi.at [10.72.27.2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mailsrv.i.zmi.at (Postfix) with ESMTPSA id 139B2401C3E; Mon, 20 Dec 2010 09:59:49 +0100 (CET) From: Michael Monnerie Organization: it-management http://it-management.at To: xfs@oss.sgi.com, xfs@pzystorm.de X-ASG-Orig-Subj: Re: Problem with XFS on USB 2TB HD Subject: Re: Problem with XFS on USB 2TB HD Date: Mon, 20 Dec 2010 09:59:44 +0100 User-Agent: KMail/1.13.5 (Linux/2.6.37-rc5-zmi; KDE/4.4.4; x86_64; ; ) References: <4D0C9A4F.4040108@pzystorm.de> In-Reply-To: <4D0C9A4F.4040108@pzystorm.de> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart2195009.57HsRr3vnz"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <201012200959.48877@zmi.at> X-Barracuda-Connect: mailsrv1.zmi.at[212.69.164.54] X-Barracuda-Start-Time: 1292835592 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49962 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --nextPart2195009.57HsRr3vnz Content-Type: Text/Plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable On Samstag, 18. Dezember 2010 Kevin Richter wrote: > I have 2.9.8 (http://packages.debian.org/lenny/xfsprogs) Actual is 3.1.x, which has a *lot* of enhancements especially for speed=20 and memory consumption, and also fixes some additional errors which the=20 older versions couldn't repair. You've fixed your problem now, but it's really good to get xfs_repair=20 updated. =2D-=20 mit freundlichen Gr=C3=BCssen, Michael Monnerie, Ing. BSc it-management Internet Services: Prot=C3=A9ger http://proteger.at [gesprochen: Prot-e-schee] Tel: +43 660 / 415 6531 // ****** Radiointerview zum Thema Spam ****** // http://www.it-podcast.at/archiv.html#podcast-100716 //=20 // Haus zu verkaufen: http://zmi.at/langegg/ --nextPart2195009.57HsRr3vnz Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.15 (GNU/Linux) iEYEABECAAYFAk0PGwQACgkQzhSR9xwSCbTZhwCghfauhayWRIQdrK9TXH1VdO5N 9QkAoNzAqhr2b5xFN4aT+nY4XqiT3QsG =mz41 -----END PGP SIGNATURE----- --nextPart2195009.57HsRr3vnz-- From eflorac@intellique.com Mon Dec 20 03:54:02 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBK9s2Gv105156 for ; Mon, 20 Dec 2010 03:54:02 -0600 X-ASG-Debug-ID: 1292838953-113102ea0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp3-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8135320B1AF for ; Mon, 20 Dec 2010 01:55:57 -0800 (PST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id JT0zLfa6437xBOpX for ; Mon, 20 Dec 2010 01:55:57 -0800 (PST) Received: from galadriel.home (unknown [82.235.234.79]) by smtp3-g21.free.fr (Postfix) with ESMTP id 897F2A62D9; Mon, 20 Dec 2010 10:55:48 +0100 (CET) Date: Mon, 20 Dec 2010 10:55:47 +0100 From: Emmanuel Florac To: Dave Chinner Cc: Kevin Richter , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Problem with XFS on USB 2TB HD Subject: Re: Problem with XFS on USB 2TB HD Message-ID: <20101220105547.4f9e7218@galadriel.home> In-Reply-To: <20101220045126.GK5193@dastard> References: <4D0C9A4F.4040108@pzystorm.de> <20101220001024.GH5193@dastard> <4D0EC5C5.2070407@pzystorm.de> <20101220045126.GK5193@dastard> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp3-g21.free.fr[212.27.42.3] X-Barracuda-Start-Time: 1292838959 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49967 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Mon, 20 Dec 2010 15:51:26 +1100 vous =C3=A9criviez: > >=20 > Who knows how the encryption algorithm (sha256) is encrypting > blocks. According to Wikipedia, the block size is 512. > FWIW, encryption makes any sort of corruption below the encrypted > layer much, much worse as it turns things like single bit media > errors into undecipherable, unrecoverable blocks of noise. No > filesystem can recover from such corruption of an encrypted device. > Hence if you had the same problem on ex3, ext4, JFS, etc you will > end up with the same mess (or worse). That's why I have an unencrypted local backup and an encrypted remote one :) --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From jpiszcz@lucidpixels.com Mon Dec 20 04:18:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKAIN0j106735 for ; Mon, 20 Dec 2010 04:18:23 -0600 X-ASG-Debug-ID: 1292840418-2e4203830000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from lucidpixels.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id AFC051CDEACC for ; Mon, 20 Dec 2010 02:20:18 -0800 (PST) Received: from lucidpixels.com (lucidpixels.com [75.144.35.66]) by cuda.sgi.com with ESMTP id ik0vnfaBgKbM6pMB for ; Mon, 20 Dec 2010 02:20:18 -0800 (PST) Received: by lucidpixels.com (Postfix, from userid 1001) id 7D50612099A; Mon, 20 Dec 2010 05:20:18 -0500 (EST) Date: Mon, 20 Dec 2010 05:20:18 -0500 (EST) From: Justin Piszcz To: xfs@oss.sgi.com X-ASG-Orig-Subj: Question regarding xfs_repair / memory requirement. Subject: Question regarding xfs_repair / memory requirement. Message-ID: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII X-Barracuda-Connect: lucidpixels.com[75.144.35.66] X-Barracuda-Start-Time: 1292840419 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49969 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hi, I am looking at FS to use for a possible 43TB array. If there is a problem with a volume this large, how much ram will xfs_repair need to fsck the volume? Justin. From eflorac@intellique.com Mon Dec 20 05:02:33 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKB2WJO111840 for ; Mon, 20 Dec 2010 05:02:33 -0600 X-ASG-Debug-ID: 1292843063-447f00fe0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp3-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id BBA491CDF13E for ; Mon, 20 Dec 2010 03:04:27 -0800 (PST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id uBAzjKcNzGOpPURW for ; Mon, 20 Dec 2010 03:04:27 -0800 (PST) Received: from galadriel.home (unknown [82.235.234.79]) by smtp3-g21.free.fr (Postfix) with ESMTP id 25B27A62AA; Mon, 20 Dec 2010 12:04:19 +0100 (CET) Date: Mon, 20 Dec 2010 12:04:17 +0100 From: Emmanuel Florac To: Justin Piszcz Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Question regarding xfs_repair / memory requirement. Subject: Re: Question regarding xfs_repair / memory requirement. Message-ID: <20101220120417.1a0df133@galadriel.home> In-Reply-To: References: Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp3-g21.free.fr[212.27.42.3] X-Barracuda-Start-Time: 1292843069 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.49971 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Mon, 20 Dec 2010 05:20:18 -0500 (EST) vous =E9criviez: > I am looking at FS to use for a possible 43TB array. > If there is a problem with a volume this large, how much ram will=20 > xfs_repair need to fsck the volume? >=20 Nothing special, I have tens of such filesystems. With a < 3.0 xfs_progs you should be able to run xfs_repair with 8 GB of RAM. With newer versions the memory requirement are even lower. I often needed at times to run older xfs_repair on big filesystems with only 1 GB of RAM, and using lots of swap (3, 4 GB or more) did the trick, though of course it was slow as a caterpillar swimming in molasses. --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 05:26:58 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKBQvqH115555 for ; Mon, 20 Dec 2010 05:26:58 -0600 X-ASG-Debug-ID: 1292844534-6b1300be0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 5B0FF1CDEFC5; Mon, 20 Dec 2010 03:28:54 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id Xh8bVC0lE1CkpsFi; Mon, 20 Dec 2010 03:28:54 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUdvA-0001xU-5v; Mon, 20 Dec 2010 11:28:52 +0000 Date: Mon, 20 Dec 2010 06:28:52 -0500 From: Christoph Hellwig To: Alex Elder Cc: Christoph Hellwig , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 3/4] xfs: refactor xlog_recover_commit_trans Subject: Re: [PATCH 3/4] xfs: refactor xlog_recover_commit_trans Message-ID: <20101220112852.GB6881@infradead.org> References: <20101201220620.340188389@bombadil.infradead.org> <20101201220710.454838485@bombadil.infradead.org> <1292534295.2457.58.camel@doink> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292534295.2457.58.camel@doink> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292844534 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 16, 2010 at 03:18:15PM -0600, Alex Elder wrote: > On Wed, 2010-12-01 at 17:06 -0500, Christoph Hellwig wrote: > > > > Merge the call to xlog_recover_reorder_trans and the loop over the > > recovery items from xlog_recover_do_trans into xlog_recover_commit_trans, > > and keep the switch statement over the log item types as a separate helper. > > > > Signed-off-by: Christoph Hellwig > > > > I'm making a small change to this one patch though... > > + case XFS_LI_BUF: > > + return xlog_recover_do_buffer_trans(log, item, pass); > > + break; > > I have deleted this "break" statement. Yeah, this is a leftover from an earlier variant. Thanks for spotting it. From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 05:27:53 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKBRqfF115620 for ; Mon, 20 Dec 2010 05:27:53 -0600 X-ASG-Debug-ID: 1292844589-446e01320000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 09A82146C9C3 for ; Mon, 20 Dec 2010 03:29:49 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id rmXvBQlXISZk3Cr7 for ; Mon, 20 Dec 2010 03:29:49 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUdw3-00020Z-PN; Mon, 20 Dec 2010 11:29:47 +0000 Date: Mon, 20 Dec 2010 06:29:47 -0500 From: Christoph Hellwig To: Dave Chinner Cc: Christoph Hellwig , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 4/7] xfs: split direct IO write path from xfs_file_aio_write Subject: Re: [PATCH 4/7] xfs: split direct IO write path from xfs_file_aio_write Message-ID: <20101220112947.GC6881@infradead.org> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> <1292376208-16282-5-git-send-email-david@fromorbit.com> <20101216120629.GC20445@infradead.org> <20101217073125.GE5193@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101217073125.GE5193@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292844590 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Fri, Dec 17, 2010 at 06:31:25PM +1100, Dave Chinner wrote: > > Speaking of that, shouldn't xfs_file_aio_read also take the iolock > > exclusive during the page invalidation and then demote it, just like > > the write case? The above helpers would enforce that nicely. > > Probably, though it might be best to leave that to another cleanup > series. I'll see how much perturbation of the read path it makes.... Yes, it should be a separate patch for sure. If you prefer another series that's fine with me, too. From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 05:29:45 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKBTiZM115739 for ; Mon, 20 Dec 2010 05:29:45 -0600 X-ASG-Debug-ID: 1292844701-446d011e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8E0A6146C9F4 for ; Mon, 20 Dec 2010 03:31:41 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id CiHBtTNupkuqQNMP for ; Mon, 20 Dec 2010 03:31:41 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUdxr-0002na-Aw; Mon, 20 Dec 2010 11:31:39 +0000 Date: Mon, 20 Dec 2010 06:31:39 -0500 From: Christoph Hellwig To: Dave Chinner Cc: Nick Piggin , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs_efi_item slab leak Subject: Re: xfs_efi_item slab leak Message-ID: <20101220113139.GA10324@infradead.org> References: <20101218000245.GG5193@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101218000245.GG5193@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292844701 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Sat, Dec 18, 2010 at 11:02:45AM +1100, Dave Chinner wrote: > Ok, after unmounting everything I can see two items in remaining in > the xfs_efi_item cache after an xfstests run. ??t's probably to do > with a filesystem shutdown not cleaning them up correctly. I'll put > it on my list of stuff to track down. Does it still happen with your working tree? The incorrect handling of IOP_UNPING with remove == 1 looks like it could cause something similar. From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 05:33:02 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,SUBJ_TICKET autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKBX14i115909 for ; Mon, 20 Dec 2010 05:33:02 -0600 X-ASG-Debug-ID: 1292844898-397d01e10000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 16E1F146CC53 for ; Mon, 20 Dec 2010 03:34:58 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id eQxFkyZJ9w9XhFwQ for ; Mon, 20 Dec 2010 03:34:58 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUe14-0003Rw-EL; Mon, 20 Dec 2010 11:34:58 +0000 Date: Mon, 20 Dec 2010 06:34:58 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 01/12] xfs: convert log grant ticket queues to list heads Subject: Re: [PATCH 01/12] xfs: convert log grant ticket queues to list heads Message-ID: <20101220113458.GA12806@infradead.org> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> <1292215483-18224-2-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292215483-18224-2-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292844899 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 03:44:32PM +1100, Dave Chinner wrote: > - __field(void *, reserve_headq) > - __field(void *, write_headq) > + __field(void *, reserveq) > + __field(void *, writeq) To repeat my question from the last review: what's the point in logging this at all? There's not much we can do with it from trace-cmd / perf output. What might be more useful is a list_empty() boolean flag. From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 05:35:34 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKBZYng116034 for ; Mon, 20 Dec 2010 05:35:34 -0600 X-ASG-Debug-ID: 1292845051-61f302520000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 97E8B20E061 for ; Mon, 20 Dec 2010 03:37:31 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id M6HWTpocg1XcEyUi for ; Mon, 20 Dec 2010 03:37:31 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUe3X-0004EV-7D; Mon, 20 Dec 2010 11:37:31 +0000 Date: Mon, 20 Dec 2010 06:37:31 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 03/12] xfs: rework log grant space calculations Subject: Re: [PATCH 03/12] xfs: rework log grant space calculations Message-ID: <20101220113731.GB12806@infradead.org> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> <1292215483-18224-4-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292215483-18224-4-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292845051 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Looks good, Reviewed-by: Christoph Hellwig From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 05:38:24 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKBcOWw116186 for ; Mon, 20 Dec 2010 05:38:24 -0600 X-ASG-Debug-ID: 1292845220-6b0e01080000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 271E31CDF29A for ; Mon, 20 Dec 2010 03:40:21 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id Kn3sgmHsuhTDLB8y for ; Mon, 20 Dec 2010 03:40:21 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUe6G-00057T-Nr; Mon, 20 Dec 2010 11:40:20 +0000 Date: Mon, 20 Dec 2010 06:40:20 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 04/12] xfs: combine grant heads into a single 64 bit integer Subject: Re: [PATCH 04/12] xfs: combine grant heads into a single 64 bit integer Message-ID: <20101220114020.GC12806@infradead.org> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> <1292215483-18224-5-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292215483-18224-5-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292845221 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 03:44:35PM +1100, Dave Chinner wrote: > From: Dave Chinner > > Prepare for switching the grant heads to atomic variables by > combining the two 32 bit values that make up the grant head into a > single 64 bit variable. Provide wrapper functions to combine and > split the grant heads appropriately for calculations and use them as > necessary. > > Signed-off-by: Dave Chinner Looks good, Reviewed-by: Christoph Hellwig Minor nitpick: > + if ((tail_cycle == head_cycle) && (head_bytes >= tail_bytes)) { > + free_bytes = log->l_logsize - (head_bytes - tail_bytes); > + } else if ((tail_cycle + 1) < head_cycle) { Lots of superflous braces in the if statements. From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 05:39:03 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKBd2Vk116245 for ; Mon, 20 Dec 2010 05:39:03 -0600 X-ASG-Debug-ID: 1292845259-446d017a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C8DDE146CB38 for ; Mon, 20 Dec 2010 03:40:59 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 0DWQCYD6ahV1ecgx for ; Mon, 20 Dec 2010 03:40:59 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUe6t-00059z-5j; Mon, 20 Dec 2010 11:40:59 +0000 Date: Mon, 20 Dec 2010 06:40:59 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 05/12] xfs: use wait queues directly for the log wait queues Subject: Re: [PATCH 05/12] xfs: use wait queues directly for the log wait queues Message-ID: <20101220114059.GD12806@infradead.org> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> <1292215483-18224-6-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292215483-18224-6-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292845259 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 03:44:36PM +1100, Dave Chinner wrote: > From: Dave Chinner > > The log grant queues are one of the few places left using sv_t > constructs for waiting. Given we are touching this code, we should > convert them to plain wait queues. While there, convert all the > other sv_t users in the log code as well. > > Seeing as this removes the last users of the sv_t type, remove the > header file defining the wrapper and the fragments that still > reference it. Looks good, Reviewed-by: Christoph Hellwig From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 05:39:34 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKBdY2q116293 for ; Mon, 20 Dec 2010 05:39:34 -0600 X-ASG-Debug-ID: 1292845291-479f01890000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9885C146CBE1 for ; Mon, 20 Dec 2010 03:41:31 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 4T8KIFK3mESDZjkA for ; Mon, 20 Dec 2010 03:41:31 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUe7O-0005Cp-W2; Mon, 20 Dec 2010 11:41:31 +0000 Date: Mon, 20 Dec 2010 06:41:30 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 06/12] xfs: make AIL tail pushing independent of the grant lock Subject: Re: [PATCH 06/12] xfs: make AIL tail pushing independent of the grant lock Message-ID: <20101220114130.GE12806@infradead.org> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> <1292215483-18224-7-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292215483-18224-7-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292845291 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Looks good, Reviewed-by: Christoph Hellwig From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 05:47:04 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,SUBJ_TICKET autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKBl3aN117306 for ; Mon, 20 Dec 2010 05:47:03 -0600 X-ASG-Debug-ID: 1292845740-7cbd01080000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0253D20E0E1 for ; Mon, 20 Dec 2010 03:49:00 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id bIGFyKVd4iV18PGS for ; Mon, 20 Dec 2010 03:49:00 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUeEe-0006SJ-JY; Mon, 20 Dec 2010 11:49:00 +0000 Date: Mon, 20 Dec 2010 06:49:00 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 10/12] xfs: introduce new locks for the log grant ticket wait queues Subject: Re: [PATCH 10/12] xfs: introduce new locks for the log grant ticket wait queues Message-ID: <20101220114900.GF12806@infradead.org> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> <1292215483-18224-11-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292215483-18224-11-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292845741 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 03:44:41PM +1100, Dave Chinner wrote: > From: Dave Chinner > > The log grant ticket wait queues are currently protected by the log > grant lock. However, the queues are functionally independent from > each other, and operations on them only require serialisation > against other queue operations now that all of the other log > variables they use are atomic values. > > Hence, we can make them independent of the grant lock by introducing > new locks just to protect the lists operations. because the lists > are independent, we can use a lock per list and ensure that reserve > and write head queuing do not contend. > > To ensure forced shutdowns work correctly in conjunction with the > new fast paths, ensure that we check whether the log has been shut > down in the grant functions once we hold the relevant spin locks but > before we go to sleep. This is needed to co-ordinate correctly with > the wakeups that are issued on the ticket queues so we don't leave > any processes sleeping on the queues during a shutdown. > > Signed-off-by: Dave Chinner Looks good, Reviewed-by: Christoph Hellwig From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 05:48:51 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKBmpab117665 for ; Mon, 20 Dec 2010 05:48:51 -0600 X-ASG-Debug-ID: 1292845848-5a4402f70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 78FAE20D86B for ; Mon, 20 Dec 2010 03:50:48 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id ZuWcdq7aDuVkACce for ; Mon, 20 Dec 2010 03:50:48 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUeGO-0007Hu-3Y; Mon, 20 Dec 2010 11:50:48 +0000 Date: Mon, 20 Dec 2010 06:50:48 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 11/12] xfs: convert grant head manipulations to lockless algorithm Subject: Re: [PATCH 11/12] xfs: convert grant head manipulations to lockless algorithm Message-ID: <20101220115048.GG12806@infradead.org> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> <1292215483-18224-12-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292215483-18224-12-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292845848 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Looks good, Reviewed-by: Christoph Hellwig From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 05:49:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKBnThx117784 for ; Mon, 20 Dec 2010 05:49:29 -0600 X-ASG-Debug-ID: 1292845886-26b003530000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7DF79146D126 for ; Mon, 20 Dec 2010 03:51:26 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id TxklfkZ3LxtcIKHE for ; Mon, 20 Dec 2010 03:51:26 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUeGz-0007JW-SK; Mon, 20 Dec 2010 11:51:25 +0000 Date: Mon, 20 Dec 2010 06:51:25 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 02/12] xfs: fact out common grant head/log tail verification code Subject: Re: [PATCH 02/12] xfs: fact out common grant head/log tail verification code Message-ID: <20101220115125.GH12806@infradead.org> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> <1292215483-18224-3-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292215483-18224-3-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292845886 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 03:44:33PM +1100, Dave Chinner wrote: > From: Dave Chinner > > Factor repeated debug code out of grant head manipulation functions into a > separate function. This removes ifdef DEBUG spagetti from the code and makes > the code easier to follow. Looks good, Reviewed-by: Christoph Hellwig From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 06:04:37 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKC4bZV120070 for ; Mon, 20 Dec 2010 06:04:37 -0600 X-ASG-Debug-ID: 1292846794-6b0f01920000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 969C61CDF3FD for ; Mon, 20 Dec 2010 04:06:34 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id Tbr8U36TufuAD31v for ; Mon, 20 Dec 2010 04:06:34 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUeVe-0001yA-5z; Mon, 20 Dec 2010 12:06:34 +0000 Date: Mon, 20 Dec 2010 07:06:34 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 08/12] xfs: convert l_tail_lsn to an atomic variable. Subject: Re: [PATCH 08/12] xfs: convert l_tail_lsn to an atomic variable. Message-ID: <20101220120634.GA3582@infradead.org> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> <1292215483-18224-9-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292215483-18224-9-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292846794 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 13, 2010 at 03:44:39PM +1100, Dave Chinner wrote: > From: Dave Chinner > > log->l_tail_lsn is currently protected by the log grant lock. The > lock is only needed for serialising readers against writers, so we > don't really need the lock if we make the l_tail_lsn variable an > atomic. Converting the l_tail_lsn variable to an atomic64_t means we > can start to peel back the grant lock from various operations. > > Also, provide functions to safely crack an atomic LSN variable into > it's component pieces and to recombined the components into an > atomic variable. Use them where appropriate. > > This also removes the need for explicitly holding a spinlock to read > the l_tail_lsn on 32 bit platforms. I know I suggested this, but I think the atomic read of l_tail_lsn in xlog_space_left might be problemetic for the call from xlog_grant_push_ail, where we read it twice now. Maybe split xlog_space_left into a __xlog_space_left that gets the already cracked values, and xlog_space_left as a wrapper around it? From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 11:39:54 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKHdpRL152536 for ; Mon, 20 Dec 2010 11:39:54 -0600 X-ASG-Debug-ID: 1292866907-26a2021d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8BD7720FC5E for ; Mon, 20 Dec 2010 09:41:48 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id XsYuZuANk4vZ4rQR for ; Mon, 20 Dec 2010 09:41:48 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUjk2-0000tt-I7; Mon, 20 Dec 2010 17:41:46 +0000 Date: Mon, 20 Dec 2010 12:41:46 -0500 From: Christoph Hellwig To: Lukas Czerner Cc: xfs@oss.sgi.com, esandeen@redhat.com X-ASG-Orig-Subj: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Subject: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Message-ID: <20101220174146.GA32680@infradead.org> References: <1291996407-26251-1-git-send-email-lczerner@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1291996407-26251-1-git-send-email-lczerner@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292866908 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hi Lukas, I've looked over it a bit again, and I can't really comment on the code too much, as my bash fu is nowhere near a level to actually make sense of most of the testcase. I have however ran it in a few setups and can comment based on that. First your current first discard to check if we actually support it is not handled correctly. Running the test on a filesystem that doesn't support it currently fails the test for me with: @@ -1,3 +1,2 @@ QA output created by 249 -Checking FITRIM support: done. -Running the test: done. +Checking FITRIM support: fstrim: FSTRIM: Inappropriate ioctl for device This should be easily fixable by redirecting the output of the test command to /dev/null and do a _notrun if it exited with an error value, just like other tests that require non-standard behaviour. Second using data from /usr/share/doc seems a bit non-deterministic to me, as the content will be different on every system. Any chance you could just use the xfstests source code instead? Third the testcase runs forever, e.g. 93 minutes in my KVM setup, even using a no-op discard implementation. While this is useful for burn in testing having a shorter run time version that can be run automatically would be really useful. I tried to figure out what paramters control the runtime, but as mentioned above my bash skill really aren't enough to do that. From BATV+09ef06d8205ccdb14ecd+2675+infradead.org+hch@bombadil.srs.infradead.org Mon Dec 20 11:58:17 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKHwHa9154562 for ; Mon, 20 Dec 2010 11:58:17 -0600 X-ASG-Debug-ID: 1292868014-795f02dc0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 86063146D991 for ; Mon, 20 Dec 2010 10:00:14 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id L0YSTjMvNj6tYo9E for ; Mon, 20 Dec 2010 10:00:14 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PUk1t-0004s7-SG; Mon, 20 Dec 2010 18:00:13 +0000 Date: Mon, 20 Dec 2010 13:00:13 -0500 From: Christoph Hellwig To: xfs@oss.sgi.com, linux-kernel@vger.kernel.org X-ASG-Orig-Subj: XFS status update for November 2010 Subject: XFS status update for November 2010 Message-ID: <20101220180013.GA16283@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292868014 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean >From looking at the kernel git commits November looked like a pretty slow month with just two hand full fixes going into the release candidates for Linux 2.6.37, and none at all going into the development tree. But in this case git statistics didn't tell the whole story - there was a lot of activity on patches for the next merge window on the list. The focus in November was still at metadata scalability, with various patchsets that improves parallel creates and unlinks again, and also improves 8-way dbench throughput by 30%. In addition to that there were patches to improve preallocation for NFS servers, to simplify the writeback code, and to remove the XFS-internal percpu counters for free space for the generic kernel percpu counters, which just needed a small improvement. On the user space side we saw the release of xfsprogs 3.1.4, which contains various accumulated bug fixes and Debian packaging updates. The xfsdump tree saw a large update to speed up restore by using mmap for an internal database and remove the limitation of ~ 214 million directory entries per dump file. The xfstests test suite saw three new testcases and various fixes, including support for the hfsplus filesystem. From SRS0++t02+23+fromorbit.com=david@internode.on.net Mon Dec 20 16:25:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBKMP1Da184775 for ; Mon, 20 Dec 2010 16:25:01 -0600 X-ASG-Debug-ID: 1292884016-38d403cf0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1A32B1CE1F0F for ; Mon, 20 Dec 2010 14:26:56 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id BQ5LPm7KyRDnKj7j for ; Mon, 20 Dec 2010 14:26:56 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50515294-1927428 for multiple; Tue, 21 Dec 2010 08:56:55 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PUoBx-0000T5-CA; Tue, 21 Dec 2010 09:26:53 +1100 Date: Tue, 21 Dec 2010 09:26:53 +1100 From: Dave Chinner To: Justin Piszcz Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Question regarding xfs_repair / memory requirement. Subject: Re: Question regarding xfs_repair / memory requirement. Message-ID: <20101220222653.GL5193@dastard> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292884018 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50017 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 20, 2010 at 05:20:18AM -0500, Justin Piszcz wrote: > Hi, > > I am looking at FS to use for a possible 43TB array. > If there is a problem with a volume this large, how much ram will > xfs_repair need to fsck the volume? $ dd if=/dev/zero of=/mnt/scratch/test.img bs=1048576 count=1 seek=50000000 1+0 records in 1+0 records out 1048576 bytes (1.0 MB) copied, 0.00463602 s, 226 MB/s $ ls -lh /mnt/scratch/test.img -rw-r--r-- 1 dave dave 48T Dec 21 09:22 /mnt/scratch/test.img $ sudo mkfs.xfs -d name=/mnt/scratch/test.img,file,size=43t [sudo] password for dave: meta-data=/mnt/scratch/test.img isize=256 agcount=43, agsize=268435455 blks = sectsz=512 attr=2 data = bsize=4096 blocks=11542724565, imaxpct=5 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 log =internal log bsize=4096 blocks=521728, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0 $ sudo xfs_repair -m 1 -vv /mnt/scratch/test.img Phase 1 - find and verify superblock... - max_mem = 1024, icount = 64, imem = 0, dblock = 11542724565, dmem = 5636095 Required memory for repair is greater that the maximum specified with the -m option. Please increase it to at least 5552 $ Not taking inodes into account, you'll need at least 5.5GB of RAM to run xfs_repair on a 43TB filesystem. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+r6Os+24+fromorbit.com=david@internode.on.net Mon Dec 20 18:50:03 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL0o3tJ200147 for ; Mon, 20 Dec 2010 18:50:03 -0600 X-ASG-Debug-ID: 1292892717-7b2b013e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1766E146F504 for ; Mon, 20 Dec 2010 16:51:57 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id CSJD4WxRnM3kFPsh for ; Mon, 20 Dec 2010 16:51:57 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 39174032-1927428 for multiple; Tue, 21 Dec 2010 11:21:56 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PUqSI-0000hl-Tm; Tue, 21 Dec 2010 11:51:54 +1100 Date: Tue, 21 Dec 2010 11:51:54 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 4/7] xfs: split direct IO write path from xfs_file_aio_write Subject: Re: [PATCH 4/7] xfs: split direct IO write path from xfs_file_aio_write Message-ID: <20101221005154.GM5193@dastard> References: <1292376208-16282-1-git-send-email-david@fromorbit.com> <1292376208-16282-5-git-send-email-david@fromorbit.com> <20101216120629.GC20445@infradead.org> <20101217073125.GE5193@dastard> <20101220112947.GC6881@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101220112947.GC6881@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292892720 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50026 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 20, 2010 at 06:29:47AM -0500, Christoph Hellwig wrote: > On Fri, Dec 17, 2010 at 06:31:25PM +1100, Dave Chinner wrote: > > > Speaking of that, shouldn't xfs_file_aio_read also take the iolock > > > exclusive during the page invalidation and then demote it, just like > > > the write case? The above helpers would enforce that nicely. > > > > Probably, though it might be best to leave that to another cleanup > > series. I'll see how much perturbation of the read path it makes.... > > Yes, it should be a separate patch for sure. If you prefer another > series that's fine with me, too. Turns out to be pretty trivial to do - I included it in the new xfs_rw_ilock conversion patch for the moment. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+45mW+24+fromorbit.com=david@internode.on.net Mon Dec 20 18:52:13 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL0qDKr200298 for ; Mon, 20 Dec 2010 18:52:13 -0600 X-ASG-Debug-ID: 1292892848-0ba900870000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3F2991CE2402 for ; Mon, 20 Dec 2010 16:54:08 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id l9LoxzYTdevWMr3O for ; Mon, 20 Dec 2010 16:54:08 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50021320-1927428 for multiple; Tue, 21 Dec 2010 11:24:07 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PUqUP-0000hv-OS; Tue, 21 Dec 2010 11:54:05 +1100 Date: Tue, 21 Dec 2010 11:54:05 +1100 From: Dave Chinner To: Christoph Hellwig Cc: Nick Piggin , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs_efi_item slab leak Subject: Re: xfs_efi_item slab leak Message-ID: <20101221005405.GN5193@dastard> References: <20101218000245.GG5193@dastard> <20101220113139.GA10324@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101220113139.GA10324@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292892850 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50027 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 20, 2010 at 06:31:39AM -0500, Christoph Hellwig wrote: > On Sat, Dec 18, 2010 at 11:02:45AM +1100, Dave Chinner wrote: > > Ok, after unmounting everything I can see two items in remaining in > > the xfs_efi_item cache after an xfstests run. ??t's probably to do > > with a filesystem shutdown not cleaning them up correctly. I'll put > > it on my list of stuff to track down. > > Does it still happen with your working tree? The incorrect handling > of IOP_UNPING with remove == 1 looks like it could cause something > similar. I haven't checked the current patch set - just on the kernel that I was currently running - I'll do more analysis later this afternoon. I agree that the IOP_UNPIN() handling is a likely culprit, though. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+t6tm+24+fromorbit.com=david@internode.on.net Mon Dec 20 18:53:48 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,SUBJ_TICKET autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL0rlT4200401 for ; Mon, 20 Dec 2010 18:53:48 -0600 X-ASG-Debug-ID: 1292892943-7b2601280000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 39C40146F538 for ; Mon, 20 Dec 2010 16:55:44 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id ilux53v4aZNdFPPj for ; Mon, 20 Dec 2010 16:55:44 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50641385-1927428 for multiple; Tue, 21 Dec 2010 11:25:43 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PUqVx-0000i9-Ow; Tue, 21 Dec 2010 11:55:41 +1100 Date: Tue, 21 Dec 2010 11:55:41 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 01/12] xfs: convert log grant ticket queues to list heads Subject: Re: [PATCH 01/12] xfs: convert log grant ticket queues to list heads Message-ID: <20101221005541.GO5193@dastard> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> <1292215483-18224-2-git-send-email-david@fromorbit.com> <20101220113458.GA12806@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101220113458.GA12806@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1292892945 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50026 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 20, 2010 at 06:34:58AM -0500, Christoph Hellwig wrote: > On Mon, Dec 13, 2010 at 03:44:32PM +1100, Dave Chinner wrote: > > - __field(void *, reserve_headq) > > - __field(void *, write_headq) > > + __field(void *, reserveq) > > + __field(void *, writeq) > > To repeat my question from the last review: what's the point in logging > this at all? There's not much we can do with it from trace-cmd / perf > output. What might be more useful is a list_empty() boolean flag. Oh, I missed that when running through all the comments. Thanks for pointing it out again - I'll fix it this time. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+p6vy+24+fromorbit.com=dave@internode.on.net Mon Dec 20 18:54:49 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,J_CHICKENPOX_42, J_CHICKENPOX_45,J_CHICKENPOX_48 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL0smcG200467 for ; Mon, 20 Dec 2010 18:54:49 -0600 X-ASG-Debug-ID: 1292893004-040b00f00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0DCAA1CE2416 for ; Mon, 20 Dec 2010 16:56:44 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id Nn3LoGdmkh3r0qrj for ; Mon, 20 Dec 2010 16:56:44 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50641490-1927428 for ; Tue, 21 Dec 2010 11:26:43 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUqWw-0000iN-En for xfs@oss.sgi.com; Tue, 21 Dec 2010 11:56:42 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUqWn-0003F4-FV for xfs@oss.sgi.com; Tue, 21 Dec 2010 11:56:33 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH] xfs: use KM_NOFS for allocations during attribute list operations Subject: [PATCH] xfs: use KM_NOFS for allocations during attribute list operations Date: Tue, 21 Dec 2010 11:56:33 +1100 Message-Id: <1292892993-12424-1-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1292893006 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50027 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner When listing attributes, we are doiing memory allocations under the inode ilock using only KM_SLEEP. This allows memory allocation to recurse back into the filesystem and do writeback, which may the ilock we already hold on the current inode. THis will deadlock. Hence use KM_NOFS for such allocations outside of transaction context to ensure that reclaim recursion does not occur. Reported-by: Nick Piggin Signed-off-by: Dave Chinner --- fs/xfs/xfs_attr_leaf.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c index a6cff8e..71e90dc2 100644 --- a/fs/xfs/xfs_attr_leaf.c +++ b/fs/xfs/xfs_attr_leaf.c @@ -637,7 +637,7 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context) * It didn't all fit, so we have to sort everything on hashval. */ sbsize = sf->hdr.count * sizeof(*sbuf); - sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP); + sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP | KM_NOFS); /* * Scan the attribute list for the rest of the entries, storing @@ -2386,7 +2386,7 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context) args.dp = context->dp; args.whichfork = XFS_ATTR_FORK; args.valuelen = valuelen; - args.value = kmem_alloc(valuelen, KM_SLEEP); + args.value = kmem_alloc(valuelen, KM_SLEEP | KM_NOFS); args.rmtblkno = be32_to_cpu(name_rmt->valueblk); args.rmtblkcnt = XFS_B_TO_FSB(args.dp->i_mount, valuelen); retval = xfs_attr_rmtval_get(&args); -- 1.7.2.3 From SRS0+iND5+24+fromorbit.com=david@internode.on.net Mon Dec 20 19:25:25 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL1PP6q202506 for ; Mon, 20 Dec 2010 19:25:25 -0600 X-ASG-Debug-ID: 1292894840-7b2c02660000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8D395146F966 for ; Mon, 20 Dec 2010 17:27:20 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id 40Saz56HWwNgLTvP for ; Mon, 20 Dec 2010 17:27:20 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50388840-1927428 for multiple; Tue, 21 Dec 2010 11:57:19 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PUr0Y-0000lE-1m; Tue, 21 Dec 2010 12:27:18 +1100 Date: Tue, 21 Dec 2010 12:27:17 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 08/12] xfs: convert l_tail_lsn to an atomic variable. Subject: Re: [PATCH 08/12] xfs: convert l_tail_lsn to an atomic variable. Message-ID: <20101221012717.GP5193@dastard> References: <1292215483-18224-1-git-send-email-david@fromorbit.com> <1292215483-18224-9-git-send-email-david@fromorbit.com> <20101220120634.GA3582@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101220120634.GA3582@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1292894842 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50028 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 20, 2010 at 07:06:34AM -0500, Christoph Hellwig wrote: > On Mon, Dec 13, 2010 at 03:44:39PM +1100, Dave Chinner wrote: > > From: Dave Chinner > > > > log->l_tail_lsn is currently protected by the log grant lock. The > > lock is only needed for serialising readers against writers, so we > > don't really need the lock if we make the l_tail_lsn variable an > > atomic. Converting the l_tail_lsn variable to an atomic64_t means we > > can start to peel back the grant lock from various operations. > > > > Also, provide functions to safely crack an atomic LSN variable into > > it's component pieces and to recombined the components into an > > atomic variable. Use them where appropriate. > > > > This also removes the need for explicitly holding a spinlock to read > > the l_tail_lsn on 32 bit platforms. > > I know I suggested this, but I think the atomic read of l_tail_lsn > in xlog_space_left might be problemetic for the call from > xlog_grant_push_ail, where we read it twice now. Maybe split > xlog_space_left into a __xlog_space_left that gets the already cracked > values, and xlog_space_left as a wrapper around it? I'd convinced myself that it wouldn't be a problem. That is, once we have a value for the tail_lsn in xlog_grant_push_ail(), the threshold that we will push to is effectively fixed. The only thing that will change is the amount of log space currently available, which can only increase if the tail moves. Hence we'll either get: a) not enough log space and have to push, in which case the value of the tail lsn seen in xlog_space_left() is irrelevant to the threshold lsn we calculate, or b) we'll have enough log space and not need to push in which case we don't need to use the tail_lsn at all because we don't need to push. So it seems to me that the double sample of the tail_lsn doesn't matter at all for this code. Is there a hole in my logic here? Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:27:53 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.4 required=5.0 tests=BAYES_00,J_CHICKENPOX_33, J_CHICKENPOX_63,J_CHICKENPOX_64,J_CHICKENPOX_65,J_CHICKENPOX_72 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7Rrla244545 for ; Tue, 21 Dec 2010 01:27:53 -0600 X-ASG-Debug-ID: 1292916587-362c023a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7BB43212017 for ; Mon, 20 Dec 2010 23:29:47 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id y52aG5nNFBfMuT3Y for ; Mon, 20 Dec 2010 23:29:47 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50397530-1927428 for ; Tue, 21 Dec 2010 17:59:46 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfI-0001CQ-Bn for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:44 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwf7-0006Yq-0j for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:33 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 04/34] xfs: use generic per-cpu counter infrastructure Subject: [PATCH 04/34] xfs: use generic per-cpu counter infrastructure Date: Tue, 21 Dec 2010 18:29:00 +1100 Message-Id: <1292916570-25015-5-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail18.adl2.internode.on.net[150.101.137.103] X-Barracuda-Start-Time: 1292916589 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.42 X-Barracuda-Spam-Status: No, SCORE=-1.42 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=MARKETING_SUBJECT X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.60 MARKETING_SUBJECT Subject contains popular marketing words X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner XFS has a per-cpu counter implementation for in-core superblock counters that pre-dated the generic implementation. It is complex and baroque as it is tailored directly to the needs of ENOSPC detection. Now that the generic percpu counter infrastructure has the percpu_counter_add_unless_lt() function that implements the necessary threshold checks for us, switch the XFS per-cpu superblock counters to use the generic percpu counter infrastructure. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_linux.h | 9 - fs/xfs/linux-2.6/xfs_super.c | 4 +- fs/xfs/xfs_fsops.c | 4 +- fs/xfs/xfs_mount.c | 806 ++++++++---------------------------------- fs/xfs/xfs_mount.h | 71 +--- 5 files changed, 171 insertions(+), 723 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h index 214ddd7..9fa4f2a 100644 --- a/fs/xfs/linux-2.6/xfs_linux.h +++ b/fs/xfs/linux-2.6/xfs_linux.h @@ -88,15 +88,6 @@ #include #include -/* - * Feature macros (disable/enable) - */ -#ifdef CONFIG_SMP -#define HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ -#else -#undef HAVE_PERCPU_SB /* per cpu superblock counters are a 2.6 feature */ -#endif - #define irix_sgid_inherit xfs_params.sgid_inherit.val #define irix_symlink_mode xfs_params.symlink_mode.val #define xfs_panic_mask xfs_params.panic_mask.val diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index c45b323..abcda07 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -1229,9 +1229,9 @@ xfs_fs_statfs( statp->f_fsid.val[0] = (u32)id; statp->f_fsid.val[1] = (u32)(id >> 32); - xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); - spin_lock(&mp->m_sb_lock); + xfs_icsb_sync_counters(mp); + statp->f_bsize = sbp->sb_blocksize; lsize = sbp->sb_logstart ? sbp->sb_logblocks : 0; statp->f_blocks = sbp->sb_dblocks - lsize; diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index a7c116e..fb9a9c8 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -478,8 +478,8 @@ xfs_fs_counts( xfs_mount_t *mp, xfs_fsop_counts_t *cnt) { - xfs_icsb_sync_counters(mp, XFS_ICSB_LAZY_COUNT); spin_lock(&mp->m_sb_lock); + xfs_icsb_sync_counters(mp); cnt->freedata = mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); cnt->freertx = mp->m_sb.sb_frextents; cnt->freeino = mp->m_sb.sb_ifree; @@ -540,7 +540,7 @@ xfs_reserve_blocks( */ retry: spin_lock(&mp->m_sb_lock); - xfs_icsb_sync_counters_locked(mp, 0); + xfs_icsb_sync_counters(mp); /* * If our previous reservation was larger than the current value, diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 19e9dfa..4a99e14 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -46,19 +46,6 @@ STATIC void xfs_unmountfs_wait(xfs_mount_t *); - -#ifdef HAVE_PERCPU_SB -STATIC void xfs_icsb_balance_counter(xfs_mount_t *, xfs_sb_field_t, - int); -STATIC void xfs_icsb_balance_counter_locked(xfs_mount_t *, xfs_sb_field_t, - int); -STATIC void xfs_icsb_disable_counter(xfs_mount_t *, xfs_sb_field_t); -#else - -#define xfs_icsb_balance_counter(mp, a, b) do { } while (0) -#define xfs_icsb_balance_counter_locked(mp, a, b) do { } while (0) -#endif - static const struct { short offset; short type; /* 0 = integer @@ -281,6 +268,71 @@ xfs_free_perag( } /* + * Per-cpu incore superblock counters + * + * This provides distributed per cpu counters for contended fields (e.g. free + * block count). Difficulties arise in that the incore sb is used for ENOSPC + * checking, and hence needs to be accurately read when we are running low on + * space. Hence We need to check against counter error bounds and determine how + * accurately to sum based on that metric. The percpu counters take care of + * this for us, so we only need to modify the fast path to handle per-cpu + * counter error cases. + */ +void +xfs_icsb_reinit_counters( + struct xfs_mount *mp) +{ + percpu_counter_set(&mp->m_icsb[XFS_ICSB_FDBLOCKS], + mp->m_sb.sb_fdblocks); + percpu_counter_set(&mp->m_icsb[XFS_ICSB_IFREE], mp->m_sb.sb_ifree); + percpu_counter_set(&mp->m_icsb[XFS_ICSB_ICOUNT], mp->m_sb.sb_icount); +} + +int +xfs_icsb_init_counters( + struct xfs_mount *mp) +{ + int i; + int error; + + for (i = 0; i < XFS_ICSB_MAX; i++) { + error = percpu_counter_init(&mp->m_icsb[i], 0); + if (error) + goto out_error; + } + xfs_icsb_reinit_counters(mp); + return 0; + +out_error: + for (; i >= 0; i--) + percpu_counter_destroy(&mp->m_icsb[i]); + return error; +} + +void +xfs_icsb_destroy_counters( + xfs_mount_t *mp) +{ + int i; + + for (i = 0; i < XFS_ICSB_MAX; i++) + percpu_counter_destroy(&mp->m_icsb[i]); +} + +void +xfs_icsb_sync_counters( + xfs_mount_t *mp) +{ + assert_spin_locked(&mp->m_sb_lock); + mp->m_sb.sb_icount = + percpu_counter_sum_positive(&mp->m_icsb[XFS_ICSB_ICOUNT]); + mp->m_sb.sb_ifree = + percpu_counter_sum_positive(&mp->m_icsb[XFS_ICSB_IFREE]); + mp->m_sb.sb_fdblocks = + percpu_counter_sum_positive(&mp->m_icsb[XFS_ICSB_FDBLOCKS]); +} + +/* * Check size of device based on the (data/realtime) block count. * Note: this check is used by the growfs code as well as mount. */ @@ -1562,7 +1614,9 @@ xfs_log_sbcount( if (!xfs_fs_writable(mp)) return 0; - xfs_icsb_sync_counters(mp, 0); + spin_lock(&mp->m_sb_lock); + xfs_icsb_sync_counters(mp); + spin_unlock(&mp->m_sb_lock); /* * we don't need to do this if we are updating the superblock @@ -1674,9 +1728,8 @@ xfs_mod_incore_sb_unlocked( int64_t delta, int rsvd) { - int scounter; /* short counter for 32 bit fields */ - long long lcounter; /* long counter for 64 bit fields */ - long long res_used, rem; + int scounter = 0; /* short counter for 32 bit fields */ + long long lcounter = 0; /* long counter for 64 bit fields */ /* * With the in-core superblock spin lock held, switch @@ -1685,66 +1738,6 @@ xfs_mod_incore_sb_unlocked( * 0, then do not apply the delta and return EINVAL. */ switch (field) { - case XFS_SBS_ICOUNT: - lcounter = (long long)mp->m_sb.sb_icount; - lcounter += delta; - if (lcounter < 0) { - ASSERT(0); - return XFS_ERROR(EINVAL); - } - mp->m_sb.sb_icount = lcounter; - return 0; - case XFS_SBS_IFREE: - lcounter = (long long)mp->m_sb.sb_ifree; - lcounter += delta; - if (lcounter < 0) { - ASSERT(0); - return XFS_ERROR(EINVAL); - } - mp->m_sb.sb_ifree = lcounter; - return 0; - case XFS_SBS_FDBLOCKS: - lcounter = (long long) - mp->m_sb.sb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); - res_used = (long long)(mp->m_resblks - mp->m_resblks_avail); - - if (delta > 0) { /* Putting blocks back */ - if (res_used > delta) { - mp->m_resblks_avail += delta; - } else { - rem = delta - res_used; - mp->m_resblks_avail = mp->m_resblks; - lcounter += rem; - } - } else { /* Taking blocks away */ - lcounter += delta; - if (lcounter >= 0) { - mp->m_sb.sb_fdblocks = lcounter + - XFS_ALLOC_SET_ASIDE(mp); - return 0; - } - - /* - * We are out of blocks, use any available reserved - * blocks if were allowed to. - */ - if (!rsvd) - return XFS_ERROR(ENOSPC); - - lcounter = (long long)mp->m_resblks_avail + delta; - if (lcounter >= 0) { - mp->m_resblks_avail = lcounter; - return 0; - } - printk_once(KERN_WARNING - "Filesystem \"%s\": reserve blocks depleted! " - "Consider increasing reserve pool size.", - mp->m_fsname); - return XFS_ERROR(ENOSPC); - } - - mp->m_sb.sb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp); - return 0; case XFS_SBS_FREXTENTS: lcounter = (long long)mp->m_sb.sb_frextents; lcounter += delta; @@ -1846,9 +1839,6 @@ xfs_mod_incore_sb( { int status; -#ifdef HAVE_PERCPU_SB - ASSERT(field < XFS_SBS_ICOUNT || field > XFS_SBS_FDBLOCKS); -#endif spin_lock(&mp->m_sb_lock); status = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd); spin_unlock(&mp->m_sb_lock); @@ -1886,9 +1876,6 @@ xfs_mod_incore_sb_batch( */ spin_lock(&mp->m_sb_lock); for (msbp = &msbp[0]; msbp < (msb + nmsb); msbp++) { - ASSERT(msbp->msb_field < XFS_SBS_ICOUNT || - msbp->msb_field > XFS_SBS_FDBLOCKS); - error = xfs_mod_incore_sb_unlocked(mp, msbp->msb_field, msbp->msb_delta, rsvd); if (error) @@ -1907,6 +1894,90 @@ unwind: return error; } +int +xfs_icsb_modify_counters( + xfs_mount_t *mp, + xfs_sb_field_t field, + int64_t delta, + int rsvd) +{ + int64_t lcounter; + int64_t res_used; + int ret = 0; + + + switch (field) { + case XFS_SBS_ICOUNT: + ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_SBS_ICOUNT], + delta, 0); + if (ret < 0) { + ASSERT(0); + return XFS_ERROR(EINVAL); + } + return 0; + + case XFS_SBS_IFREE: + ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_SBS_IFREE], + delta, 0); + if (ret < 0) { + ASSERT(0); + return XFS_ERROR(EINVAL); + } + return 0; + + case XFS_SBS_FDBLOCKS: + /* + * if we are putting blocks back, put them into the reserve + * block pool first. + */ + if (mp->m_resblks != mp->m_resblks_avail && delta > 0) { + spin_lock(&mp->m_sb_lock); + res_used = (int64_t)(mp->m_resblks - + mp->m_resblks_avail); + if (res_used > delta) { + mp->m_resblks_avail += delta; + delta = 0; + } else { + delta -= res_used; + mp->m_resblks_avail = mp->m_resblks; + } + spin_unlock(&mp->m_sb_lock); + if (!delta) + return 0; + } + + /* try the change */ + ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_ICSB_FDBLOCKS], + delta, XFS_ALLOC_SET_ASIDE(mp)); + if (likely(ret >= 0)) + return 0; + + /* ENOSPC */ + ASSERT(delta < 0); + + if (!rsvd) + return XFS_ERROR(ENOSPC); + + spin_lock(&mp->m_sb_lock); + lcounter = (int64_t)mp->m_resblks_avail + delta; + if (lcounter >= 0) { + mp->m_resblks_avail = lcounter; + spin_unlock(&mp->m_sb_lock); + return 0; + } + spin_unlock(&mp->m_sb_lock); + printk_once(KERN_WARNING + "Filesystem \"%s\": reserve blocks depleted! " + "Consider increasing reserve pool size.", + mp->m_fsname); + return XFS_ERROR(ENOSPC); + default: + ASSERT(0); + return XFS_ERROR(EINVAL); + } + return 0; +} + /* * xfs_getsb() is called to obtain the buffer for the superblock. * The buffer is returned locked and read in from disk. @@ -2000,572 +2071,3 @@ xfs_dev_is_read_only( } return 0; } - -#ifdef HAVE_PERCPU_SB -/* - * Per-cpu incore superblock counters - * - * Simple concept, difficult implementation - * - * Basically, replace the incore superblock counters with a distributed per cpu - * counter for contended fields (e.g. free block count). - * - * Difficulties arise in that the incore sb is used for ENOSPC checking, and - * hence needs to be accurately read when we are running low on space. Hence - * there is a method to enable and disable the per-cpu counters based on how - * much "stuff" is available in them. - * - * Basically, a counter is enabled if there is enough free resource to justify - * running a per-cpu fast-path. If the per-cpu counter runs out (i.e. a local - * ENOSPC), then we disable the counters to synchronise all callers and - * re-distribute the available resources. - * - * If, once we redistributed the available resources, we still get a failure, - * we disable the per-cpu counter and go through the slow path. - * - * The slow path is the current xfs_mod_incore_sb() function. This means that - * when we disable a per-cpu counter, we need to drain its resources back to - * the global superblock. We do this after disabling the counter to prevent - * more threads from queueing up on the counter. - * - * Essentially, this means that we still need a lock in the fast path to enable - * synchronisation between the global counters and the per-cpu counters. This - * is not a problem because the lock will be local to a CPU almost all the time - * and have little contention except when we get to ENOSPC conditions. - * - * Basically, this lock becomes a barrier that enables us to lock out the fast - * path while we do things like enabling and disabling counters and - * synchronising the counters. - * - * Locking rules: - * - * 1. m_sb_lock before picking up per-cpu locks - * 2. per-cpu locks always picked up via for_each_online_cpu() order - * 3. accurate counter sync requires m_sb_lock + per cpu locks - * 4. modifying per-cpu counters requires holding per-cpu lock - * 5. modifying global counters requires holding m_sb_lock - * 6. enabling or disabling a counter requires holding the m_sb_lock - * and _none_ of the per-cpu locks. - * - * Disabled counters are only ever re-enabled by a balance operation - * that results in more free resources per CPU than a given threshold. - * To ensure counters don't remain disabled, they are rebalanced when - * the global resource goes above a higher threshold (i.e. some hysteresis - * is present to prevent thrashing). - */ - -#ifdef CONFIG_HOTPLUG_CPU -/* - * hot-plug CPU notifier support. - * - * We need a notifier per filesystem as we need to be able to identify - * the filesystem to balance the counters out. This is achieved by - * having a notifier block embedded in the xfs_mount_t and doing pointer - * magic to get the mount pointer from the notifier block address. - */ -STATIC int -xfs_icsb_cpu_notify( - struct notifier_block *nfb, - unsigned long action, - void *hcpu) -{ - xfs_icsb_cnts_t *cntp; - xfs_mount_t *mp; - - mp = (xfs_mount_t *)container_of(nfb, xfs_mount_t, m_icsb_notifier); - cntp = (xfs_icsb_cnts_t *) - per_cpu_ptr(mp->m_sb_cnts, (unsigned long)hcpu); - switch (action) { - case CPU_UP_PREPARE: - case CPU_UP_PREPARE_FROZEN: - /* Easy Case - initialize the area and locks, and - * then rebalance when online does everything else for us. */ - memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); - break; - case CPU_ONLINE: - case CPU_ONLINE_FROZEN: - xfs_icsb_lock(mp); - xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0); - xfs_icsb_unlock(mp); - break; - case CPU_DEAD: - case CPU_DEAD_FROZEN: - /* Disable all the counters, then fold the dead cpu's - * count into the total on the global superblock and - * re-enable the counters. */ - xfs_icsb_lock(mp); - spin_lock(&mp->m_sb_lock); - xfs_icsb_disable_counter(mp, XFS_SBS_ICOUNT); - xfs_icsb_disable_counter(mp, XFS_SBS_IFREE); - xfs_icsb_disable_counter(mp, XFS_SBS_FDBLOCKS); - - mp->m_sb.sb_icount += cntp->icsb_icount; - mp->m_sb.sb_ifree += cntp->icsb_ifree; - mp->m_sb.sb_fdblocks += cntp->icsb_fdblocks; - - memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); - - xfs_icsb_balance_counter_locked(mp, XFS_SBS_ICOUNT, 0); - xfs_icsb_balance_counter_locked(mp, XFS_SBS_IFREE, 0); - xfs_icsb_balance_counter_locked(mp, XFS_SBS_FDBLOCKS, 0); - spin_unlock(&mp->m_sb_lock); - xfs_icsb_unlock(mp); - break; - } - - return NOTIFY_OK; -} -#endif /* CONFIG_HOTPLUG_CPU */ - -int -xfs_icsb_init_counters( - xfs_mount_t *mp) -{ - xfs_icsb_cnts_t *cntp; - int i; - - mp->m_sb_cnts = alloc_percpu(xfs_icsb_cnts_t); - if (mp->m_sb_cnts == NULL) - return -ENOMEM; - -#ifdef CONFIG_HOTPLUG_CPU - mp->m_icsb_notifier.notifier_call = xfs_icsb_cpu_notify; - mp->m_icsb_notifier.priority = 0; - register_hotcpu_notifier(&mp->m_icsb_notifier); -#endif /* CONFIG_HOTPLUG_CPU */ - - for_each_online_cpu(i) { - cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); - memset(cntp, 0, sizeof(xfs_icsb_cnts_t)); - } - - mutex_init(&mp->m_icsb_mutex); - - /* - * start with all counters disabled so that the - * initial balance kicks us off correctly - */ - mp->m_icsb_counters = -1; - return 0; -} - -void -xfs_icsb_reinit_counters( - xfs_mount_t *mp) -{ - xfs_icsb_lock(mp); - /* - * start with all counters disabled so that the - * initial balance kicks us off correctly - */ - mp->m_icsb_counters = -1; - xfs_icsb_balance_counter(mp, XFS_SBS_ICOUNT, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_IFREE, 0); - xfs_icsb_balance_counter(mp, XFS_SBS_FDBLOCKS, 0); - xfs_icsb_unlock(mp); -} - -void -xfs_icsb_destroy_counters( - xfs_mount_t *mp) -{ - if (mp->m_sb_cnts) { - unregister_hotcpu_notifier(&mp->m_icsb_notifier); - free_percpu(mp->m_sb_cnts); - } - mutex_destroy(&mp->m_icsb_mutex); -} - -STATIC void -xfs_icsb_lock_cntr( - xfs_icsb_cnts_t *icsbp) -{ - while (test_and_set_bit(XFS_ICSB_FLAG_LOCK, &icsbp->icsb_flags)) { - ndelay(1000); - } -} - -STATIC void -xfs_icsb_unlock_cntr( - xfs_icsb_cnts_t *icsbp) -{ - clear_bit(XFS_ICSB_FLAG_LOCK, &icsbp->icsb_flags); -} - - -STATIC void -xfs_icsb_lock_all_counters( - xfs_mount_t *mp) -{ - xfs_icsb_cnts_t *cntp; - int i; - - for_each_online_cpu(i) { - cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); - xfs_icsb_lock_cntr(cntp); - } -} - -STATIC void -xfs_icsb_unlock_all_counters( - xfs_mount_t *mp) -{ - xfs_icsb_cnts_t *cntp; - int i; - - for_each_online_cpu(i) { - cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); - xfs_icsb_unlock_cntr(cntp); - } -} - -STATIC void -xfs_icsb_count( - xfs_mount_t *mp, - xfs_icsb_cnts_t *cnt, - int flags) -{ - xfs_icsb_cnts_t *cntp; - int i; - - memset(cnt, 0, sizeof(xfs_icsb_cnts_t)); - - if (!(flags & XFS_ICSB_LAZY_COUNT)) - xfs_icsb_lock_all_counters(mp); - - for_each_online_cpu(i) { - cntp = (xfs_icsb_cnts_t *)per_cpu_ptr(mp->m_sb_cnts, i); - cnt->icsb_icount += cntp->icsb_icount; - cnt->icsb_ifree += cntp->icsb_ifree; - cnt->icsb_fdblocks += cntp->icsb_fdblocks; - } - - if (!(flags & XFS_ICSB_LAZY_COUNT)) - xfs_icsb_unlock_all_counters(mp); -} - -STATIC int -xfs_icsb_counter_disabled( - xfs_mount_t *mp, - xfs_sb_field_t field) -{ - ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); - return test_bit(field, &mp->m_icsb_counters); -} - -STATIC void -xfs_icsb_disable_counter( - xfs_mount_t *mp, - xfs_sb_field_t field) -{ - xfs_icsb_cnts_t cnt; - - ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); - - /* - * If we are already disabled, then there is nothing to do - * here. We check before locking all the counters to avoid - * the expensive lock operation when being called in the - * slow path and the counter is already disabled. This is - * safe because the only time we set or clear this state is under - * the m_icsb_mutex. - */ - if (xfs_icsb_counter_disabled(mp, field)) - return; - - xfs_icsb_lock_all_counters(mp); - if (!test_and_set_bit(field, &mp->m_icsb_counters)) { - /* drain back to superblock */ - - xfs_icsb_count(mp, &cnt, XFS_ICSB_LAZY_COUNT); - switch(field) { - case XFS_SBS_ICOUNT: - mp->m_sb.sb_icount = cnt.icsb_icount; - break; - case XFS_SBS_IFREE: - mp->m_sb.sb_ifree = cnt.icsb_ifree; - break; - case XFS_SBS_FDBLOCKS: - mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks; - break; - default: - BUG(); - } - } - - xfs_icsb_unlock_all_counters(mp); -} - -STATIC void -xfs_icsb_enable_counter( - xfs_mount_t *mp, - xfs_sb_field_t field, - uint64_t count, - uint64_t resid) -{ - xfs_icsb_cnts_t *cntp; - int i; - - ASSERT((field >= XFS_SBS_ICOUNT) && (field <= XFS_SBS_FDBLOCKS)); - - xfs_icsb_lock_all_counters(mp); - for_each_online_cpu(i) { - cntp = per_cpu_ptr(mp->m_sb_cnts, i); - switch (field) { - case XFS_SBS_ICOUNT: - cntp->icsb_icount = count + resid; - break; - case XFS_SBS_IFREE: - cntp->icsb_ifree = count + resid; - break; - case XFS_SBS_FDBLOCKS: - cntp->icsb_fdblocks = count + resid; - break; - default: - BUG(); - break; - } - resid = 0; - } - clear_bit(field, &mp->m_icsb_counters); - xfs_icsb_unlock_all_counters(mp); -} - -void -xfs_icsb_sync_counters_locked( - xfs_mount_t *mp, - int flags) -{ - xfs_icsb_cnts_t cnt; - - xfs_icsb_count(mp, &cnt, flags); - - if (!xfs_icsb_counter_disabled(mp, XFS_SBS_ICOUNT)) - mp->m_sb.sb_icount = cnt.icsb_icount; - if (!xfs_icsb_counter_disabled(mp, XFS_SBS_IFREE)) - mp->m_sb.sb_ifree = cnt.icsb_ifree; - if (!xfs_icsb_counter_disabled(mp, XFS_SBS_FDBLOCKS)) - mp->m_sb.sb_fdblocks = cnt.icsb_fdblocks; -} - -/* - * Accurate update of per-cpu counters to incore superblock - */ -void -xfs_icsb_sync_counters( - xfs_mount_t *mp, - int flags) -{ - spin_lock(&mp->m_sb_lock); - xfs_icsb_sync_counters_locked(mp, flags); - spin_unlock(&mp->m_sb_lock); -} - -/* - * Balance and enable/disable counters as necessary. - * - * Thresholds for re-enabling counters are somewhat magic. inode counts are - * chosen to be the same number as single on disk allocation chunk per CPU, and - * free blocks is something far enough zero that we aren't going thrash when we - * get near ENOSPC. We also need to supply a minimum we require per cpu to - * prevent looping endlessly when xfs_alloc_space asks for more than will - * be distributed to a single CPU but each CPU has enough blocks to be - * reenabled. - * - * Note that we can be called when counters are already disabled. - * xfs_icsb_disable_counter() optimises the counter locking in this case to - * prevent locking every per-cpu counter needlessly. - */ - -#define XFS_ICSB_INO_CNTR_REENABLE (uint64_t)64 -#define XFS_ICSB_FDBLK_CNTR_REENABLE(mp) \ - (uint64_t)(512 + XFS_ALLOC_SET_ASIDE(mp)) -STATIC void -xfs_icsb_balance_counter_locked( - xfs_mount_t *mp, - xfs_sb_field_t field, - int min_per_cpu) -{ - uint64_t count, resid; - int weight = num_online_cpus(); - uint64_t min = (uint64_t)min_per_cpu; - - /* disable counter and sync counter */ - xfs_icsb_disable_counter(mp, field); - - /* update counters - first CPU gets residual*/ - switch (field) { - case XFS_SBS_ICOUNT: - count = mp->m_sb.sb_icount; - resid = do_div(count, weight); - if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE)) - return; - break; - case XFS_SBS_IFREE: - count = mp->m_sb.sb_ifree; - resid = do_div(count, weight); - if (count < max(min, XFS_ICSB_INO_CNTR_REENABLE)) - return; - break; - case XFS_SBS_FDBLOCKS: - count = mp->m_sb.sb_fdblocks; - resid = do_div(count, weight); - if (count < max(min, XFS_ICSB_FDBLK_CNTR_REENABLE(mp))) - return; - break; - default: - BUG(); - count = resid = 0; /* quiet, gcc */ - break; - } - - xfs_icsb_enable_counter(mp, field, count, resid); -} - -STATIC void -xfs_icsb_balance_counter( - xfs_mount_t *mp, - xfs_sb_field_t fields, - int min_per_cpu) -{ - spin_lock(&mp->m_sb_lock); - xfs_icsb_balance_counter_locked(mp, fields, min_per_cpu); - spin_unlock(&mp->m_sb_lock); -} - -int -xfs_icsb_modify_counters( - xfs_mount_t *mp, - xfs_sb_field_t field, - int64_t delta, - int rsvd) -{ - xfs_icsb_cnts_t *icsbp; - long long lcounter; /* long counter for 64 bit fields */ - int ret = 0; - - might_sleep(); -again: - preempt_disable(); - icsbp = this_cpu_ptr(mp->m_sb_cnts); - - /* - * if the counter is disabled, go to slow path - */ - if (unlikely(xfs_icsb_counter_disabled(mp, field))) - goto slow_path; - xfs_icsb_lock_cntr(icsbp); - if (unlikely(xfs_icsb_counter_disabled(mp, field))) { - xfs_icsb_unlock_cntr(icsbp); - goto slow_path; - } - - switch (field) { - case XFS_SBS_ICOUNT: - lcounter = icsbp->icsb_icount; - lcounter += delta; - if (unlikely(lcounter < 0)) - goto balance_counter; - icsbp->icsb_icount = lcounter; - break; - - case XFS_SBS_IFREE: - lcounter = icsbp->icsb_ifree; - lcounter += delta; - if (unlikely(lcounter < 0)) - goto balance_counter; - icsbp->icsb_ifree = lcounter; - break; - - case XFS_SBS_FDBLOCKS: - BUG_ON((mp->m_resblks - mp->m_resblks_avail) != 0); - - lcounter = icsbp->icsb_fdblocks - XFS_ALLOC_SET_ASIDE(mp); - lcounter += delta; - if (unlikely(lcounter < 0)) - goto balance_counter; - icsbp->icsb_fdblocks = lcounter + XFS_ALLOC_SET_ASIDE(mp); - break; - default: - BUG(); - break; - } - xfs_icsb_unlock_cntr(icsbp); - preempt_enable(); - return 0; - -slow_path: - preempt_enable(); - - /* - * serialise with a mutex so we don't burn lots of cpu on - * the superblock lock. We still need to hold the superblock - * lock, however, when we modify the global structures. - */ - xfs_icsb_lock(mp); - - /* - * Now running atomically. - * - * If the counter is enabled, someone has beaten us to rebalancing. - * Drop the lock and try again in the fast path.... - */ - if (!(xfs_icsb_counter_disabled(mp, field))) { - xfs_icsb_unlock(mp); - goto again; - } - - /* - * The counter is currently disabled. Because we are - * running atomically here, we know a rebalance cannot - * be in progress. Hence we can go straight to operating - * on the global superblock. We do not call xfs_mod_incore_sb() - * here even though we need to get the m_sb_lock. Doing so - * will cause us to re-enter this function and deadlock. - * Hence we get the m_sb_lock ourselves and then call - * xfs_mod_incore_sb_unlocked() as the unlocked path operates - * directly on the global counters. - */ - spin_lock(&mp->m_sb_lock); - ret = xfs_mod_incore_sb_unlocked(mp, field, delta, rsvd); - spin_unlock(&mp->m_sb_lock); - - /* - * Now that we've modified the global superblock, we - * may be able to re-enable the distributed counters - * (e.g. lots of space just got freed). After that - * we are done. - */ - if (ret != ENOSPC) - xfs_icsb_balance_counter(mp, field, 0); - xfs_icsb_unlock(mp); - return ret; - -balance_counter: - xfs_icsb_unlock_cntr(icsbp); - preempt_enable(); - - /* - * We may have multiple threads here if multiple per-cpu - * counters run dry at the same time. This will mean we can - * do more balances than strictly necessary but it is not - * the common slowpath case. - */ - xfs_icsb_lock(mp); - - /* - * running atomically. - * - * This will leave the counter in the correct state for future - * accesses. After the rebalance, we simply try again and our retry - * will either succeed through the fast path or slow path without - * another balance operation being required. - */ - xfs_icsb_balance_counter(mp, field, delta); - xfs_icsb_unlock(mp); - goto again; -} - -#endif diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 5861b49..42d31df 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -65,44 +65,19 @@ struct xfs_nameops; struct xfs_ail; struct xfs_quotainfo; -#ifdef HAVE_PERCPU_SB - /* - * Valid per-cpu incore superblock counters. Note that if you add new counters, - * you may need to define new counter disabled bit field descriptors as there - * are more possible fields in the superblock that can fit in a bitfield on a - * 32 bit platform. The XFS_SBS_* values for the current current counters just - * fit. + * Per-cpu incore superblock counters. */ -typedef struct xfs_icsb_cnts { - uint64_t icsb_fdblocks; - uint64_t icsb_ifree; - uint64_t icsb_icount; - unsigned long icsb_flags; -} xfs_icsb_cnts_t; - -#define XFS_ICSB_FLAG_LOCK (1 << 0) /* counter lock bit */ - -#define XFS_ICSB_LAZY_COUNT (1 << 1) /* accuracy not needed */ +enum { + XFS_ICSB_FDBLOCKS = 0, + XFS_ICSB_IFREE, + XFS_ICSB_ICOUNT, + XFS_ICSB_MAX, +}; -extern int xfs_icsb_init_counters(struct xfs_mount *); -extern void xfs_icsb_reinit_counters(struct xfs_mount *); -extern void xfs_icsb_destroy_counters(struct xfs_mount *); -extern void xfs_icsb_sync_counters(struct xfs_mount *, int); -extern void xfs_icsb_sync_counters_locked(struct xfs_mount *, int); extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, int64_t, int); -#else -#define xfs_icsb_init_counters(mp) (0) -#define xfs_icsb_destroy_counters(mp) do { } while (0) -#define xfs_icsb_reinit_counters(mp) do { } while (0) -#define xfs_icsb_sync_counters(mp, flags) do { } while (0) -#define xfs_icsb_sync_counters_locked(mp, flags) do { } while (0) -#define xfs_icsb_modify_counters(mp, field, delta, rsvd) \ - xfs_mod_incore_sb(mp, field, delta, rsvd) -#endif - typedef struct xfs_mount { struct super_block *m_super; xfs_tid_t m_tid; /* next unused tid for fs */ @@ -186,12 +161,6 @@ typedef struct xfs_mount { struct xfs_chash *m_chash; /* fs private inode per-cluster * hash table */ atomic_t m_active_trans; /* number trans frozen */ -#ifdef HAVE_PERCPU_SB - xfs_icsb_cnts_t __percpu *m_sb_cnts; /* per-cpu superblock counters */ - unsigned long m_icsb_counters; /* disabled per-cpu counters */ - struct notifier_block m_icsb_notifier; /* hotplug cpu notifier */ - struct mutex m_icsb_mutex; /* balancer sync lock */ -#endif struct xfs_mru_cache *m_filestream; /* per-mount filestream data */ struct task_struct *m_sync_task; /* generalised sync thread */ xfs_sync_work_t m_sync_work; /* work item for VFS_SYNC */ @@ -202,6 +171,7 @@ typedef struct xfs_mount { __int64_t m_update_flags; /* sb flags we need to update on the next remount,rw */ struct shrinker m_inode_shrink; /* inode reclaim shrinker */ + struct percpu_counter m_icsb[XFS_ICSB_MAX]; } xfs_mount_t; /* @@ -333,26 +303,6 @@ struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *mp, xfs_agnumber_t agno, void xfs_perag_put(struct xfs_perag *pag); /* - * Per-cpu superblock locking functions - */ -#ifdef HAVE_PERCPU_SB -static inline void -xfs_icsb_lock(xfs_mount_t *mp) -{ - mutex_lock(&mp->m_icsb_mutex); -} - -static inline void -xfs_icsb_unlock(xfs_mount_t *mp) -{ - mutex_unlock(&mp->m_icsb_mutex); -} -#else -#define xfs_icsb_lock(mp) -#define xfs_icsb_unlock(mp) -#endif - -/* * This structure is for use by the xfs_mod_incore_sb_batch() routine. * xfs_growfs can specify a few fields which are more than int limit */ @@ -379,6 +329,11 @@ extern int xfs_sb_validate_fsb_count(struct xfs_sb *, __uint64_t); extern int xfs_dev_is_read_only(struct xfs_mount *, char *); +extern int xfs_icsb_init_counters(struct xfs_mount *); +extern void xfs_icsb_reinit_counters(struct xfs_mount *); +extern void xfs_icsb_destroy_counters(struct xfs_mount *); +extern void xfs_icsb_sync_counters(struct xfs_mount *); + #endif /* __KERNEL__ */ extern void xfs_mod_sb(struct xfs_trans *, __int64_t); -- 1.7.2.3 From SRS0+Brkf+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,J_CHICKENPOX_42, J_CHICKENPOX_45,J_CHICKENPOX_48 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7S1Et244569 for ; Tue, 21 Dec 2010 01:28:01 -0600 X-ASG-Debug-ID: 1292916596-226003150000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3AEAD1CE33C4 for ; Mon, 20 Dec 2010 23:29:57 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id jxiNExXf68F3A4iZ for ; Mon, 20 Dec 2010 23:29:57 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50839304-1927428 for ; Tue, 21 Dec 2010 17:59:55 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfI-0001CM-7w for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:44 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwf6-0006Yk-TG for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:32 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 02/34] xfs: use KM_NOFS for allocations during attribute list operations Subject: [PATCH 02/34] xfs: use KM_NOFS for allocations during attribute list operations Date: Tue, 21 Dec 2010 18:28:58 +1100 Message-Id: <1292916570-25015-3-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292916598 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner When listing attributes, we are doiing memory allocations under the inode ilock using only KM_SLEEP. This allows memory allocation to recurse back into the filesystem and do writeback, which may the ilock we already hold on the current inode. THis will deadlock. Hence use KM_NOFS for such allocations outside of transaction context to ensure that reclaim recursion does not occur. Reported-by: Nick Piggin Signed-off-by: Dave Chinner --- fs/xfs/xfs_attr_leaf.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/xfs/xfs_attr_leaf.c b/fs/xfs/xfs_attr_leaf.c index a6cff8e..71e90dc2 100644 --- a/fs/xfs/xfs_attr_leaf.c +++ b/fs/xfs/xfs_attr_leaf.c @@ -637,7 +637,7 @@ xfs_attr_shortform_list(xfs_attr_list_context_t *context) * It didn't all fit, so we have to sort everything on hashval. */ sbsize = sf->hdr.count * sizeof(*sbuf); - sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP); + sbp = sbuf = kmem_alloc(sbsize, KM_SLEEP | KM_NOFS); /* * Scan the attribute list for the rest of the entries, storing @@ -2386,7 +2386,7 @@ xfs_attr_leaf_list_int(xfs_dabuf_t *bp, xfs_attr_list_context_t *context) args.dp = context->dp; args.whichfork = XFS_ATTR_FORK; args.valuelen = valuelen; - args.value = kmem_alloc(valuelen, KM_SLEEP); + args.value = kmem_alloc(valuelen, KM_SLEEP | KM_NOFS); args.rmtblkno = be32_to_cpu(name_rmt->valueblk); args.rmtblkcnt = XFS_B_TO_FSB(args.dp->i_mount, valuelen); retval = xfs_attr_rmtval_get(&args); -- 1.7.2.3 From SRS0++ukE+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:00 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7S0nZ244565 for ; Tue, 21 Dec 2010 01:28:00 -0600 X-ASG-Debug-ID: 1292916596-362d02470000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1391121201D for ; Mon, 20 Dec 2010 23:29:56 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id vEm4l9qBHQGvYcjQ for ; Mon, 20 Dec 2010 23:29:56 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50071161-1927428 for ; Tue, 21 Dec 2010 17:59:55 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfS-0001Cf-Gc for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:54 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfH-0006Z0-5U for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:43 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 07/34] xfs: don't truncate prealloc from frequently accessed inodes Subject: [PATCH 07/34] xfs: don't truncate prealloc from frequently accessed inodes Date: Tue, 21 Dec 2010 18:29:03 +1100 Message-Id: <1292916570-25015-8-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292916598 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_SA210e X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 BSF_SC5_SA210e Custom Rule SA210e X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner A long standing problem for streaming writeÑ• through the NFS server has been that the NFS server opens and closes file descriptors on an inode for every write. The result of this behaviour is that the ->release() function is called on every close and that results in XFS truncating speculative preallocation beyond the EOF. This has an adverse effect on file layout when multiple files are being written at the same time - they interleave their extents and can result in severe fragmentation. To avoid this problem, keep a count of the number of ->release calls made on an inode. For most cases, an inode is only going to be opened once for writing and then closed again during it's lifetime in cache. Hence if there are multiple ->release calls, there is a good chance that the inode is being accessed by the NFS server. Hence count up every time ->release is called while there are delalloc blocks still outstanding on the inode. If this count is non-zero when ->release is next called, then do no truncate away the speculative preallocation - leave it there so that subsequent writes do not need to reallocate the delalloc space. This will prevent interleaving of extents of different inodes written concurrently to the same AG. If we get this wrong, it is not a big deal as we truncate speculative allocation beyond EOF anyway in xfs_inactive() when the inode is thrown out of the cache. The new counter in the struct xfs_inode fits into a hole in the structure on 64 bit machines, so does not grow the size of the inode at all. Signed-off-by: Dave Chinner --- fs/xfs/xfs_inode.h | 13 +++++----- fs/xfs/xfs_vnodeops.c | 61 ++++++++++++++++++++++++++++++++----------------- 2 files changed, 47 insertions(+), 27 deletions(-) diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index 1c6514d..5c95fa8 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -376,12 +376,13 @@ static inline void xfs_ifunlock(xfs_inode_t *ip) /* * In-core inode flags. */ -#define XFS_IRECLAIM 0x0001 /* we have started reclaiming this inode */ -#define XFS_ISTALE 0x0002 /* inode has been staled */ -#define XFS_IRECLAIMABLE 0x0004 /* inode can be reclaimed */ -#define XFS_INEW 0x0008 /* inode has just been allocated */ -#define XFS_IFILESTREAM 0x0010 /* inode is in a filestream directory */ -#define XFS_ITRUNCATED 0x0020 /* truncated down so flush-on-close */ +#define XFS_IRECLAIM 0x0001 /* started reclaiming this inode */ +#define XFS_ISTALE 0x0002 /* inode has been staled */ +#define XFS_IRECLAIMABLE 0x0004 /* inode can be reclaimed */ +#define XFS_INEW 0x0008 /* inode has just been allocated */ +#define XFS_IFILESTREAM 0x0010 /* inode is in a filestream directory */ +#define XFS_ITRUNCATED 0x0020 /* truncated down so flush-on-close */ +#define XFS_IDIRTY_RELEASE 0x0040 /* dirty release already seen */ /* * Flags for inode locking. diff --git a/fs/xfs/xfs_vnodeops.c b/fs/xfs/xfs_vnodeops.c index 8e4a63c..d8e6f8c 100644 --- a/fs/xfs/xfs_vnodeops.c +++ b/fs/xfs/xfs_vnodeops.c @@ -964,29 +964,48 @@ xfs_release( xfs_flush_pages(ip, 0, -1, XBF_ASYNC, FI_NONE); } - if (ip->i_d.di_nlink != 0) { - if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && - ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || - ip->i_delayed_blks > 0)) && - (ip->i_df.if_flags & XFS_IFEXTENTS)) && - (!(ip->i_d.di_flags & - (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { + if (ip->i_d.di_nlink == 0) + return 0; - /* - * If we can't get the iolock just skip truncating - * the blocks past EOF because we could deadlock - * with the mmap_sem otherwise. We'll get another - * chance to drop them once the last reference to - * the inode is dropped, so we'll never leak blocks - * permanently. - */ - error = xfs_free_eofblocks(mp, ip, - XFS_FREE_EOF_TRYLOCK); - if (error) - return error; - } - } + if ((((ip->i_d.di_mode & S_IFMT) == S_IFREG) && + ((ip->i_size > 0) || (VN_CACHED(VFS_I(ip)) > 0 || + ip->i_delayed_blks > 0)) && + (ip->i_df.if_flags & XFS_IFEXTENTS)) && + (!(ip->i_d.di_flags & (XFS_DIFLAG_PREALLOC | XFS_DIFLAG_APPEND)))) { + /* + * If we can't get the iolock just skip truncating the blocks + * past EOF because we could deadlock with the mmap_sem + * otherwise. We'll get another chance to drop them once the + * last reference to the inode is dropped, so we'll never leak + * blocks permanently. + * + * Further, check if the inode is being opened, written and + * closed frequently and we have delayed allocation blocks + * oustanding (e.g. streaming writes from the NFS server), + * truncating the blocks past EOF will cause fragmentation to + * occur. + * + * In this case don't do the truncation, either, but we have to + * be careful how we detect this case. Blocks beyond EOF show + * up as i_delayed_blks even when the inode is clean, so we + * need to truncate them away first before checking for a dirty + * release. Hence on the first dirty close we will still remove + * the speculative allocation, but after that we will leave it + * in place. + */ + if (xfs_iflags_test(ip, XFS_IDIRTY_RELEASE)) + return 0; + + error = xfs_free_eofblocks(mp, ip, + XFS_FREE_EOF_TRYLOCK); + if (error) + return error; + + /* delalloc blocks after truncation means it really is dirty */ + if (ip->i_delayed_blks) + xfs_iflags_set(ip, XFS_IDIRTY_RELEASE); + } return 0; } -- 1.7.2.3 From SRS0+CBlE+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7S1dq244576 for ; Tue, 21 Dec 2010 01:28:01 -0600 X-ASG-Debug-ID: 1292916596-300c02c10000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4ACF1212020 for ; Mon, 20 Dec 2010 23:29:57 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id MrSSBXz94zxyGTW3 for ; Mon, 20 Dec 2010 23:29:57 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50434427-1927428 for ; Tue, 21 Dec 2010 17:59:56 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfS-0001CN-8x for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:54 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwf6-0006Yn-V0 for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:32 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: =?UTF-8?q?=5BPATCH=2003/34=5D=20lib=3A=20percpu=20counter=20add=20unless=20less=20than=20functionality?= Subject: =?UTF-8?q?=5BPATCH=2003/34=5D=20lib=3A=20percpu=20counter=20add=20unless=20less=20than=20functionality?= Date: Tue, 21 Dec 2010 18:28:59 +1100 Message-Id: <1292916570-25015-4-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1292916598 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner To use the generic percpu counter infrastructure for counters that require conditional addition based on a threshold value we need special handling of the counter. Further, the caller needs to know the status of the conditional addition to determine what action to take depending on whether the addition occurred or not. Examples of this sort of usage are resource counters that cannot go below zero (e.g. filesystem free blocks). To allow XFS to replace it's complex roll-your-own per-cpu superblock counters, a single generic conditional function is required: percpu_counter_add_unless_lt(). This will add the amount to the counter unless the result would be less than the given threshold. A caller supplied threshold is required because XFS does not necessarily use the same threshold for every counter. percpu_counter_add_unless_lt() attempts to minimise counter lock traversals by only taking the counter lock when the threshold is within the error range of the current counter value. Hence when the threshold is not within the counter error range, the counter will still have the same scalability characteristics as the normal percpu_counter_add() function. Adding this functionality to the generic percpu counters allows us to remove the much more complex and less efficient XFS percpu counter code (~700 lines of code) and replace it with generic percpu counters. Signed-off-by: Dave Chinner --- include/linux/percpu_counter.h | 27 ++++++++++++++ lib/percpu_counter.c | 79 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 106 insertions(+), 0 deletions(-) diff --git a/include/linux/percpu_counter.h b/include/linux/percpu_counter.h index 46f6ba5..ad18779 100644 --- a/include/linux/percpu_counter.h +++ b/include/linux/percpu_counter.h @@ -41,12 +41,21 @@ void percpu_counter_set(struct percpu_counter *fbc, s64 amount); void __percpu_counter_add(struct percpu_counter *fbc, s64 amount, s32 batch); s64 __percpu_counter_sum(struct percpu_counter *fbc); int percpu_counter_compare(struct percpu_counter *fbc, s64 rhs); +int __percpu_counter_add_unless_lt(struct percpu_counter *fbc, s64 amount, + s64 threshold, s32 batch); static inline void percpu_counter_add(struct percpu_counter *fbc, s64 amount) { __percpu_counter_add(fbc, amount, percpu_counter_batch); } +static inline int percpu_counter_add_unless_lt(struct percpu_counter *fbc, + s64 amount, s64 threshold) +{ + return __percpu_counter_add_unless_lt(fbc, amount, threshold, + percpu_counter_batch); +} + static inline s64 percpu_counter_sum_positive(struct percpu_counter *fbc) { s64 ret = __percpu_counter_sum(fbc); @@ -153,6 +162,24 @@ static inline int percpu_counter_initialized(struct percpu_counter *fbc) return 1; } +static inline int percpu_counter_add_unless_lt(struct percpu_counter *fbc, s64 amount, + s64 threshold) +{ + s64 count; + int ret = â€1; + + preempt_disable(); + count = fbc->count + amount; + if (count < threshold) + goto out; + fbc->count = count; + ret = count == threshold ? 0 : 1; +out: + preempt_enable(); + return ret; +} + + #endif /* CONFIG_SMP */ static inline void percpu_counter_inc(struct percpu_counter *fbc) diff --git a/lib/percpu_counter.c b/lib/percpu_counter.c index 604678d..eacccb7 100644 --- a/lib/percpu_counter.c +++ b/lib/percpu_counter.c @@ -213,6 +213,85 @@ int percpu_counter_compare(struct percpu_counter *fbc, s64 rhs) } EXPORT_SYMBOL(percpu_counter_compare); +/** + * __percpu_counter_add_unless_lt - add to a counter avoiding underruns + * @fbc: counter + * @amount: amount to add + * @threshold: underrun threshold + * @batch: percpu counter batch size. + * + * Add @amount to @fdc if and only if result of addition is greater than or + * equal to @threshold Return 1 if greater and added, 0 if equal and added + * and -1 if and underrun would have occured. + * + * This is useful for operations that must accurately and atomically only add a + * delta to a counter if the result is greater than a given (e.g. for freespace + * accounting with ENOSPC checking in filesystems). + */ +int __percpu_counter_add_unless_lt(struct percpu_counter *fbc, s64 amount, + s64 threshold, s32 batch) +{ + s64 count; + s64 error = 2 * batch * num_online_cpus(); + int cpu; + int ret = -1; + + preempt_disable(); + + /* Check to see if rough count will be sufficient for comparison */ + count = percpu_counter_read(fbc); + if (count + amount < threshold - error) + goto out; + + /* + * If the counter is over the threshold and the change is less than the + * batch size, we might be able to avoid locking. + */ + if (count > threshold + error && abs(amount) < batch) { + __percpu_counter_add(fbc, amount, batch); + ret = 1; + goto out; + } + + /* + * If the result is over the error threshold, we can just add it + * into the global counter ignoring what is in the per-cpu counters + * as they will not change the result of the calculation. + */ + spin_lock(&fbc->lock); + if (fbc->count + amount > threshold + error) { + fbc->count += amount; + ret = 1; + goto out_unlock; + } + + /* + * Result is withing the error margin. Run an open-coded sum of the + * per-cpu counters to get the exact value at this point in time, + * and if the result greater than the threshold, add the amount to + * the global counter. + */ + count = fbc->count; + for_each_online_cpu(cpu) { + s32 *pcount = per_cpu_ptr(fbc->counters, cpu); + count += *pcount; + } + WARN_ON(count < threshold); + + if (count + amount >= threshold) { + ret = 0; + if (count + amount > threshold) + ret = 1; + fbc->count += amount; + } +out_unlock: + spin_unlock(&fbc->lock); +out: + preempt_enable(); + return ret; +} +EXPORT_SYMBOL(percpu_counter_add_unless_lt); + static int __init percpu_counter_startup(void) { compute_batch_value(); -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:02 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,J_CHICKENPOX_64, J_CHICKENPOX_65,J_CHICKENPOX_66 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7S25S244604 for ; Tue, 21 Dec 2010 01:28:02 -0600 X-ASG-Debug-ID: 1292916597-131303e10000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1B6521CE33C4 for ; Mon, 20 Dec 2010 23:29:57 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id mEAqRKyQGOSiDn6u for ; Mon, 20 Dec 2010 23:29:57 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50575223-1927428 for ; Tue, 21 Dec 2010 17:59:56 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfS-0001Cc-DI for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:54 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfH-0006Yt-1X for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:43 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 05/34] xfs: demultiplex xfs_icsb_modify_counters() Subject: [PATCH 05/34] xfs: demultiplex xfs_icsb_modify_counters() Date: Tue, 21 Dec 2010 18:29:01 +1100 Message-Id: <1292916570-25015-6-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292916599 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner With the conversion to percpu counters, xfs_icsb_modify_counters() really does not need to exist. Convert the inode counter modifications to use a common helper function for the one place that calls them, and add another function for the free block modification and convert all the callers to use that. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_bmap.c | 34 +++++------- fs/xfs/xfs_fsops.c | 3 +- fs/xfs/xfs_mount.c | 160 ++++++++++++++++++++++++--------------------------- fs/xfs/xfs_mount.h | 5 +- fs/xfs/xfs_trans.c | 23 +++---- 5 files changed, 102 insertions(+), 123 deletions(-) diff --git a/fs/xfs/xfs_bmap.c b/fs/xfs/xfs_bmap.c index 4111cd3..6a47556 100644 --- a/fs/xfs/xfs_bmap.c +++ b/fs/xfs/xfs_bmap.c @@ -614,8 +614,8 @@ xfs_bmap_add_extent( nblks += cur->bc_private.b.allocated; ASSERT(nblks <= da_old); if (nblks < da_old) - xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS, - (int64_t)(da_old - nblks), rsvd); + xfs_icsb_modify_free_blocks(ip->i_mount, + (int64_t)(da_old - nblks), rsvd); } /* * Clear out the allocated field, done with it now in any case. @@ -1079,7 +1079,7 @@ xfs_bmap_add_extent_delay_real( diff = (int)(temp + temp2 - startblockval(PREV.br_startblock) - (cur ? cur->bc_private.b.allocated : 0)); if (diff > 0 && - xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS, + xfs_icsb_modify_free_blocks(ip->i_mount, -((int64_t)diff), rsvd)) { /* * Ick gross gag me with a spoon. @@ -1090,8 +1090,7 @@ xfs_bmap_add_extent_delay_real( temp--; diff--; if (!diff || - !xfs_icsb_modify_counters(ip->i_mount, - XFS_SBS_FDBLOCKS, + !xfs_icsb_modify_free_blocks(ip->i_mount, -((int64_t)diff), rsvd)) break; } @@ -1099,8 +1098,7 @@ xfs_bmap_add_extent_delay_real( temp2--; diff--; if (!diff || - !xfs_icsb_modify_counters(ip->i_mount, - XFS_SBS_FDBLOCKS, + !xfs_icsb_modify_free_blocks(ip->i_mount, -((int64_t)diff), rsvd)) break; } @@ -1769,8 +1767,8 @@ xfs_bmap_add_extent_hole_delay( } if (oldlen != newlen) { ASSERT(oldlen > newlen); - xfs_icsb_modify_counters(ip->i_mount, XFS_SBS_FDBLOCKS, - (int64_t)(oldlen - newlen), rsvd); + xfs_icsb_modify_free_blocks(ip->i_mount, + (int64_t)(oldlen - newlen), rsvd); /* * Nothing to do for disk quota accounting here. */ @@ -3114,10 +3112,9 @@ xfs_bmap_del_extent( * Nothing to do for disk quota accounting here. */ ASSERT(da_old >= da_new); - if (da_old > da_new) { - xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, - (int64_t)(da_old - da_new), rsvd); - } + if (da_old > da_new) + xfs_icsb_modify_free_blocks(ip->i_mount, + (int64_t)(da_old - da_new), rsvd); done: *logflagsp = flags; return error; @@ -4530,14 +4527,12 @@ xfs_bmapi( -((int64_t)extsz), (flags & XFS_BMAPI_RSVBLOCKS)); } else { - error = xfs_icsb_modify_counters(mp, - XFS_SBS_FDBLOCKS, + error = xfs_icsb_modify_free_blocks(mp, -((int64_t)alen), (flags & XFS_BMAPI_RSVBLOCKS)); } if (!error) { - error = xfs_icsb_modify_counters(mp, - XFS_SBS_FDBLOCKS, + error = xfs_icsb_modify_free_blocks(mp, -((int64_t)indlen), (flags & XFS_BMAPI_RSVBLOCKS)); if (error && rt) @@ -4546,8 +4541,7 @@ xfs_bmapi( (int64_t)extsz, (flags & XFS_BMAPI_RSVBLOCKS)); else if (error) - xfs_icsb_modify_counters(mp, - XFS_SBS_FDBLOCKS, + xfs_icsb_modify_free_blocks(mp, (int64_t)alen, (flags & XFS_BMAPI_RSVBLOCKS)); } @@ -5210,7 +5204,7 @@ xfs_bunmapi( ip, -((long)del.br_blockcount), 0, XFS_QMOPT_RES_RTBLKS); } else { - xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, + xfs_icsb_modify_free_blocks(mp, (int64_t)del.br_blockcount, rsvd); (void)xfs_trans_reserve_quota_nblks(NULL, ip, -((long)del.br_blockcount), 0, diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index fb9a9c8..be34ff2 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -596,8 +596,7 @@ out: * the extra reserve blocks from the reserve..... */ int error; - error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, - fdblks_delta, 0); + error = xfs_icsb_modify_free_blocks(mp, fdblks_delta, 0); if (error == ENOSPC) goto retry; } diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index 4a99e14..d5710232 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -332,6 +332,80 @@ xfs_icsb_sync_counters( percpu_counter_sum_positive(&mp->m_icsb[XFS_ICSB_FDBLOCKS]); } +int +xfs_icsb_modify_inodes( + struct xfs_mount *mp, + int cntr, + int64_t delta) +{ + int ret; + + ASSERT(cntr == XFS_ICSB_ICOUNT || cntr == XFS_ICSB_IFREE); + + ret = percpu_counter_add_unless_lt(&mp->m_icsb[cntr], + delta, 0); + if (likely(ret >= 0)) + return 0; + return ret; +} + +int +xfs_icsb_modify_free_blocks( + struct xfs_mount *mp, + int64_t delta, + int rsvd) +{ + int64_t lcounter; + int64_t res_used; + int ret; + + /* + * if we are putting blocks back, put them into the reserve + * block pool first. + */ + if (unlikely(mp->m_resblks != mp->m_resblks_avail) && delta > 0) { + spin_lock(&mp->m_sb_lock); + res_used = (int64_t)(mp->m_resblks - + mp->m_resblks_avail); + if (res_used > delta) { + mp->m_resblks_avail += delta; + delta = 0; + } else { + delta -= res_used; + mp->m_resblks_avail = mp->m_resblks; + } + spin_unlock(&mp->m_sb_lock); + if (!delta) + return 0; + } + + /* try the change */ + ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_ICSB_FDBLOCKS], + delta, XFS_ALLOC_SET_ASIDE(mp)); + if (likely(ret >= 0)) + return 0; + + /* ENOSPC */ + ASSERT(delta < 0); + + if (!rsvd) + return XFS_ERROR(ENOSPC); + + spin_lock(&mp->m_sb_lock); + lcounter = (int64_t)mp->m_resblks_avail + delta; + if (lcounter >= 0) { + mp->m_resblks_avail = lcounter; + spin_unlock(&mp->m_sb_lock); + return 0; + } + spin_unlock(&mp->m_sb_lock); + printk_once(KERN_WARNING + "Filesystem \"%s\": reserve blocks depleted! " + "Consider increasing reserve pool size.", + mp->m_fsname); + return XFS_ERROR(ENOSPC); +} + /* * Check size of device based on the (data/realtime) block count. * Note: this check is used by the growfs code as well as mount. @@ -1856,7 +1930,7 @@ xfs_mod_incore_sb( * * Note that this function may not be used for the superblock values that * are tracked with the in-memory per-cpu counters - a direct call to - * xfs_icsb_modify_counters is required for these. + * xfs_icsb_modify_xxx is required for these. */ int xfs_mod_incore_sb_batch( @@ -1894,90 +1968,6 @@ unwind: return error; } -int -xfs_icsb_modify_counters( - xfs_mount_t *mp, - xfs_sb_field_t field, - int64_t delta, - int rsvd) -{ - int64_t lcounter; - int64_t res_used; - int ret = 0; - - - switch (field) { - case XFS_SBS_ICOUNT: - ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_SBS_ICOUNT], - delta, 0); - if (ret < 0) { - ASSERT(0); - return XFS_ERROR(EINVAL); - } - return 0; - - case XFS_SBS_IFREE: - ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_SBS_IFREE], - delta, 0); - if (ret < 0) { - ASSERT(0); - return XFS_ERROR(EINVAL); - } - return 0; - - case XFS_SBS_FDBLOCKS: - /* - * if we are putting blocks back, put them into the reserve - * block pool first. - */ - if (mp->m_resblks != mp->m_resblks_avail && delta > 0) { - spin_lock(&mp->m_sb_lock); - res_used = (int64_t)(mp->m_resblks - - mp->m_resblks_avail); - if (res_used > delta) { - mp->m_resblks_avail += delta; - delta = 0; - } else { - delta -= res_used; - mp->m_resblks_avail = mp->m_resblks; - } - spin_unlock(&mp->m_sb_lock); - if (!delta) - return 0; - } - - /* try the change */ - ret = percpu_counter_add_unless_lt(&mp->m_icsb[XFS_ICSB_FDBLOCKS], - delta, XFS_ALLOC_SET_ASIDE(mp)); - if (likely(ret >= 0)) - return 0; - - /* ENOSPC */ - ASSERT(delta < 0); - - if (!rsvd) - return XFS_ERROR(ENOSPC); - - spin_lock(&mp->m_sb_lock); - lcounter = (int64_t)mp->m_resblks_avail + delta; - if (lcounter >= 0) { - mp->m_resblks_avail = lcounter; - spin_unlock(&mp->m_sb_lock); - return 0; - } - spin_unlock(&mp->m_sb_lock); - printk_once(KERN_WARNING - "Filesystem \"%s\": reserve blocks depleted! " - "Consider increasing reserve pool size.", - mp->m_fsname); - return XFS_ERROR(ENOSPC); - default: - ASSERT(0); - return XFS_ERROR(EINVAL); - } - return 0; -} - /* * xfs_getsb() is called to obtain the buffer for the superblock. * The buffer is returned locked and read in from disk. diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 42d31df..03ad25c6 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -75,9 +75,6 @@ enum { XFS_ICSB_MAX, }; -extern int xfs_icsb_modify_counters(struct xfs_mount *, xfs_sb_field_t, - int64_t, int); - typedef struct xfs_mount { struct super_block *m_super; xfs_tid_t m_tid; /* next unused tid for fs */ @@ -333,6 +330,8 @@ extern int xfs_icsb_init_counters(struct xfs_mount *); extern void xfs_icsb_reinit_counters(struct xfs_mount *); extern void xfs_icsb_destroy_counters(struct xfs_mount *); extern void xfs_icsb_sync_counters(struct xfs_mount *); +extern int xfs_icsb_modify_inodes(struct xfs_mount *, int, int64_t); +extern int xfs_icsb_modify_free_blocks(struct xfs_mount *, int64_t, int); #endif /* __KERNEL__ */ diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index f6d956b..8139a2e 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -696,7 +696,7 @@ xfs_trans_reserve( * fail if the count would go below zero. */ if (blocks > 0) { - error = xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, + error = xfs_icsb_modify_free_blocks(tp->t_mountp, -((int64_t)blocks), rsvd); if (error != 0) { current_restore_flags_nested(&tp->t_pflags, PF_FSTRANS); @@ -767,8 +767,8 @@ undo_log: undo_blocks: if (blocks > 0) { - xfs_icsb_modify_counters(tp->t_mountp, XFS_SBS_FDBLOCKS, - (int64_t)blocks, rsvd); + xfs_icsb_modify_free_blocks(tp->t_mountp, + (int64_t)blocks, rsvd); tp->t_blk_res = 0; } @@ -1045,22 +1045,19 @@ xfs_trans_unreserve_and_mod_sb( /* apply the per-cpu counters */ if (blkdelta) { - error = xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, - blkdelta, rsvd); + error = xfs_icsb_modify_free_blocks(mp, blkdelta, rsvd); if (error) goto out; } if (idelta) { - error = xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, - idelta, rsvd); + error = xfs_icsb_modify_inodes(mp, XFS_ICSB_ICOUNT, idelta); if (error) goto out_undo_fdblocks; } if (ifreedelta) { - error = xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, - ifreedelta, rsvd); + error = xfs_icsb_modify_inodes(mp, XFS_ICSB_IFREE, ifreedelta); if (error) goto out_undo_icount; } @@ -1129,15 +1126,15 @@ xfs_trans_unreserve_and_mod_sb( out_undo_ifreecount: if (ifreedelta) - xfs_icsb_modify_counters(mp, XFS_SBS_IFREE, -ifreedelta, rsvd); + xfs_icsb_modify_inodes(mp, XFS_ICSB_IFREE, -ifreedelta); out_undo_icount: if (idelta) - xfs_icsb_modify_counters(mp, XFS_SBS_ICOUNT, -idelta, rsvd); + xfs_icsb_modify_inodes(mp, XFS_ICSB_ICOUNT, -idelta); out_undo_fdblocks: if (blkdelta) - xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd); + xfs_icsb_modify_free_blocks(mp, -blkdelta, rsvd); out: - ASSERT(error = 0); + ASSERT(error == 0); return; } -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7S1rI244581 for ; Tue, 21 Dec 2010 01:28:01 -0600 X-ASG-Debug-ID: 1292916596-40d600ac0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 926581470316 for ; Mon, 20 Dec 2010 23:29:56 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id Y9sY0shRLAXSniUG for ; Mon, 20 Dec 2010 23:29:56 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 39223356-1927428 for ; Tue, 21 Dec 2010 17:59:55 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfI-0001CK-5P for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:44 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwf6-0006Yg-Ot for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:32 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 00/34] xfs: scalability patchset for 2.6.38 Subject: [PATCH 00/34] xfs: scalability patchset for 2.6.38 Date: Tue, 21 Dec 2010 18:28:56 +1100 Message-Id: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292916598 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50052 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Folks, I'm sending the entire series of scalability patches in a single patchbomb because I'm tired and it's too much like hard work to send it out in multiple patchsets (i.e. I'm being lazy). Overall there are relatively few changes: - new patch for iolock lockdep annotations - new patch for allocations under ilock rcu inode freeing and lookup: - reworked reclaim to use rcu read locking - removed synchronise_rcu() from lookup failure - cleaned up validity checks, added comments and rcu_read_lock_held annotations AIL locking - fixed aild sleep to use TASK_INTERRUPTABLE Log grant scaling - made reserveq/writeq tracing just indicate if there are queued tickets. - cleaned up some minor formatting nitpicks suggested by Christoph - split xlog_space_left() into __xlog_space_left() for AIl tail pushing to work off a single tail lsn value. I'm mainly concerned with getting reviews for the few remaining patches that don't currently have reviewed-by tags. Christoph, I think I've fixed all the things your last round of comments covered, so there should be relatively little remaining to be fixed up. The series is in the following git tree which is based on the current OSS xfs tree. Alex, once I get the remaining reviews complete I'll update the branch and send you a pull request. The following changes since commit 489a150f6454e2cd93d9e0ee6d7c5a361844f62a: xfs: factor duplicate code in xfs_alloc_ag_vextent_near into a helper (2010-12-16 16:06:15 -0600) are available in the git repository at: git://git.kernel.org/pub/scm/linux/dgc/xfsdev.git xfs-for-2.6.38 Dave Chinner (34): xfs: provide a inode iolock lockdep class xfs: use KM_NOFS for allocations during attribute list operations lib: percpu counter add unless less than functionality xfs: use generic per-cpu counter infrastructure xfs: demultiplex xfs_icsb_modify_counters() xfs: dynamic speculative EOF preallocation xfs: don't truncate prealloc from frequently accessed inodes xfs: rcu free inodes xfs: convert inode cache lookups to use RCU locking xfs: convert pag_ici_lock to a spin lock xfs: convert xfsbud shrinker to a per-buftarg shrinker. xfs: add a lru to the XFS buffer cache xfs: connect up buffer reclaim priority hooks xfs: fix EFI transaction cancellation. xfs: Pull EFI/EFD handling out from under the AIL lock xfs: clean up xfs_ail_delete() xfs: bulk AIL insertion during transaction commit xfs: reduce the number of AIL push wakeups xfs: consume iodone callback items on buffers as they are processed xfs: remove all the inodes on a buffer from the AIL in bulk xfs: use AIL bulk update function to implement single updates xfs: use AIL bulk delete function to implement single delete xfs: convert log grant ticket queues to list heads xfs: fact out common grant head/log tail verification code xfs: rework log grant space calculations xfs: combine grant heads into a single 64 bit integer xfs: use wait queues directly for the log wait queues xfs: make AIL tail pushing independent of the grant lock xfs: convert l_last_sync_lsn to an atomic variable xfs: convert l_tail_lsn to an atomic variable. xfs: convert log grant heads to atomic variables xfs: introduce new locks for the log grant ticket wait queues xfs: convert grant head manipulations to lockless algorithm xfs: kill useless spinlock_destroy macro fs/xfs/linux-2.6/sv.h | 59 --- fs/xfs/linux-2.6/xfs_buf.c | 235 ++++++++---- fs/xfs/linux-2.6/xfs_buf.h | 22 +- fs/xfs/linux-2.6/xfs_linux.h | 12 - fs/xfs/linux-2.6/xfs_super.c | 26 +- fs/xfs/linux-2.6/xfs_sync.c | 92 ++++- fs/xfs/linux-2.6/xfs_trace.h | 30 +- fs/xfs/quota/xfs_dquot.c | 1 - fs/xfs/xfs_ag.h | 2 +- fs/xfs/xfs_attr_leaf.c | 4 +- fs/xfs/xfs_bmap.c | 34 +- fs/xfs/xfs_btree.c | 9 +- fs/xfs/xfs_buf_item.c | 32 +- fs/xfs/xfs_extfree_item.c | 97 +++--- fs/xfs/xfs_extfree_item.h | 11 +- fs/xfs/xfs_fsops.c | 8 +- fs/xfs/xfs_iget.c | 90 ++++- fs/xfs/xfs_inode.c | 54 ++- fs/xfs/xfs_inode.h | 15 +- fs/xfs/xfs_inode_item.c | 92 ++++- fs/xfs/xfs_iomap.c | 84 ++++- fs/xfs/xfs_log.c | 741 ++++++++++++++++-------------------- fs/xfs/xfs_log_cil.c | 17 +- fs/xfs/xfs_log_priv.h | 121 +++++- fs/xfs/xfs_log_recover.c | 35 +- fs/xfs/xfs_mount.c | 821 ++++++++-------------------------------- fs/xfs/xfs_mount.h | 90 ++--- fs/xfs/xfs_trans.c | 102 +++++- fs/xfs/xfs_trans.h | 2 +- fs/xfs/xfs_trans_ail.c | 232 ++++++------ fs/xfs/xfs_trans_extfree.c | 8 +- fs/xfs/xfs_trans_priv.h | 35 ++- fs/xfs/xfs_vnodeops.c | 61 ++- include/linux/percpu_counter.h | 27 ++ lib/percpu_counter.c | 79 ++++ 35 files changed, 1698 insertions(+), 1682 deletions(-) delete mode 100644 fs/xfs/linux-2.6/sv.h From SRS0+p6vy+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:08 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_72 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7S8nj244652 for ; Tue, 21 Dec 2010 01:28:08 -0600 X-ASG-Debug-ID: 1292916602-39be014c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id AD3771470319 for ; Mon, 20 Dec 2010 23:30:03 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id sbhg05XoXe9lBFGH for ; Mon, 20 Dec 2010 23:30:03 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50692750-1927428 for ; Tue, 21 Dec 2010 18:00:01 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfS-0001Ce-Ev for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:54 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfH-0006Yy-3D for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:43 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 06/34] xfs: dynamic speculative EOF preallocation Subject: [PATCH 06/34] xfs: dynamic speculative EOF preallocation Date: Tue, 21 Dec 2010 18:29:02 +1100 Message-Id: <1292916570-25015-7-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1292916604 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50052 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Currently the size of the speculative preallocation during delayed allocation is fixed by either the allocsize mount option of a default size. We are seeing a lot of cases where we need to recommend using the allocsize mount option to prevent fragmentation when buffered writes land in the same AG. Rather than using a fixed preallocation size by default (up to 64k), make it dynamic by basing it on the current inode size. That way the EOF preallocation will increase as the file size increases. Hence for streaming writes we are much more likely to get large preallocations exactly when we need it to reduce fragementation. For default settings, the size of the initial extents is determined by the number of parallel writers and the amount of memory in the machine. For 4GB RAM and 4 concurrent 32GB file writes: EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET TOTAL 0: [0..1048575]: 1048672..2097247 0 (1048672..2097247) 1048576 1: [1048576..2097151]: 5242976..6291551 0 (5242976..6291551) 1048576 2: [2097152..4194303]: 12583008..14680159 0 (12583008..14680159) 2097152 3: [4194304..8388607]: 25165920..29360223 0 (25165920..29360223) 4194304 4: [8388608..16777215]: 58720352..67108959 0 (58720352..67108959) 8388608 5: [16777216..33554423]: 117440584..134217791 0 (117440584..134217791) 16777208 6: [33554424..50331511]: 184549056..201326143 0 (184549056..201326143) 16777088 7: [50331512..67108599]: 251657408..268434495 0 (251657408..268434495) 16777088 and for 16 concurrent 16GB file writes: EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET TOTAL 0: [0..262143]: 2490472..2752615 0 (2490472..2752615) 262144 1: [262144..524287]: 6291560..6553703 0 (6291560..6553703) 262144 2: [524288..1048575]: 13631592..14155879 0 (13631592..14155879) 524288 3: [1048576..2097151]: 30408808..31457383 0 (30408808..31457383) 1048576 4: [2097152..4194303]: 52428904..54526055 0 (52428904..54526055) 2097152 5: [4194304..8388607]: 104857704..109052007 0 (104857704..109052007) 4194304 6: [8388608..16777215]: 209715304..218103911 0 (209715304..218103911) 8388608 7: [16777216..33554423]: 452984848..469762055 0 (452984848..469762055) 16777208 Because it is hard to take back specualtive preallocation, cases where there are large slow growing log files on a nearly full filesystem may cause premature ENOSPC. Hence as the filesystem nears full, the maximum dynamic prealloc size Ñ–s reduced according to this table (based on 4k block size): freespace max prealloc size >5% full extent (8GB) 4-5% 2GB (8GB >> 2) 3-4% 1GB (8GB >> 3) 2-3% 512MB (8GB >> 4) 1-2% 256MB (8GB >> 5) <1% 128MB (8GB >> 6) This should reduce the amount of space held in speculative preallocation for such cases. The allocsize mount option turns off the dynamic behaviour and fixes the prealloc size to whatever the mount option specifies. i.e. the behaviour is unchanged. Signed-off-by: Dave Chinner --- fs/xfs/xfs_fsops.c | 1 + fs/xfs/xfs_iomap.c | 84 +++++++++++++++++++++++++++++++++++++++++++++------ fs/xfs/xfs_mount.c | 21 +++++++++++++ fs/xfs/xfs_mount.h | 14 ++++++++ 4 files changed, 110 insertions(+), 10 deletions(-) diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c index be34ff2..6d17206 100644 --- a/fs/xfs/xfs_fsops.c +++ b/fs/xfs/xfs_fsops.c @@ -374,6 +374,7 @@ xfs_growfs_data_private( mp->m_maxicount = icount << mp->m_sb.sb_inopblog; } else mp->m_maxicount = 0; + xfs_set_low_space_thresholds(mp); /* update secondary superblocks. */ for (agno = 1; agno < nagcount; agno++) { diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c index 22b62a1..f36d2c8 100644 --- a/fs/xfs/xfs_iomap.c +++ b/fs/xfs/xfs_iomap.c @@ -267,6 +267,9 @@ error_out: * If the caller is doing a write at the end of the file, then extend the * allocation out to the file system's write iosize. We clean up any extra * space left over when the file is closed in xfs_inactive(). + * + * If we find we already have delalloc preallocation beyond EOF, don't do more + * preallocation as it it not needed. */ STATIC int xfs_iomap_eof_want_preallocate( @@ -282,6 +285,7 @@ xfs_iomap_eof_want_preallocate( xfs_filblks_t count_fsb; xfs_fsblock_t firstblock; int n, error, imaps; + int found_delalloc = 0; *prealloc = 0; if ((offset + count) <= ip->i_size) @@ -306,12 +310,60 @@ xfs_iomap_eof_want_preallocate( return 0; start_fsb += imap[n].br_blockcount; count_fsb -= imap[n].br_blockcount; + + if (imap[n].br_startblock == DELAYSTARTBLOCK) + found_delalloc = 1; } } - *prealloc = 1; + if (!found_delalloc) + *prealloc = 1; return 0; } +/* + * If we don't have a user specified preallocation size, dynamically increase + * the preallocation size as the size of the file grows. Cap the maximum size + * at a single extent or less if the filesystem is near full. The closer the + * filesystem is to full, the smaller the maximum prealocation. + */ +STATIC xfs_fsblock_t +xfs_iomap_prealloc_size( + struct xfs_mount *mp, + struct xfs_inode *ip) +{ + xfs_fsblock_t alloc_blocks = 0; + + if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { + int shift = 0; + int64_t freesp; + + alloc_blocks = XFS_B_TO_FSB(mp, ip->i_size); + alloc_blocks = XFS_FILEOFF_MIN(MAXEXTLEN, + rounddown_pow_of_two(alloc_blocks)); + + freesp = percpu_counter_read_positive( + &mp->m_icsb[XFS_ICSB_FDBLOCKS]); + if (freesp < mp->m_low_space[XFS_LOWSP_5_PCNT]) { + shift = 2; + if (freesp < mp->m_low_space[XFS_LOWSP_4_PCNT]) + shift++; + if (freesp < mp->m_low_space[XFS_LOWSP_3_PCNT]) + shift++; + if (freesp < mp->m_low_space[XFS_LOWSP_2_PCNT]) + shift++; + if (freesp < mp->m_low_space[XFS_LOWSP_1_PCNT]) + shift++; + } + if (shift) + alloc_blocks >>= shift; + } + + if (alloc_blocks < mp->m_writeio_blocks) + alloc_blocks = mp->m_writeio_blocks; + + return alloc_blocks; +} + int xfs_iomap_write_delay( xfs_inode_t *ip, @@ -344,6 +396,7 @@ xfs_iomap_write_delay( extsz = xfs_get_extsz_hint(ip); offset_fsb = XFS_B_TO_FSBT(mp, offset); + error = xfs_iomap_eof_want_preallocate(mp, ip, offset, count, imap, XFS_WRITE_IMAPS, &prealloc); if (error) @@ -351,9 +404,11 @@ xfs_iomap_write_delay( retry: if (prealloc) { + xfs_fsblock_t alloc_blocks = xfs_iomap_prealloc_size(mp, ip); + aligned_offset = XFS_WRITEIO_ALIGN(mp, (offset + count - 1)); ioalign = XFS_B_TO_FSBT(mp, aligned_offset); - last_fsb = ioalign + mp->m_writeio_blocks; + last_fsb = ioalign + alloc_blocks; } else { last_fsb = XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); } @@ -371,22 +426,31 @@ retry: XFS_BMAPI_DELAY | XFS_BMAPI_WRITE | XFS_BMAPI_ENTIRE, &firstblock, 1, imap, &nimaps, NULL); - if (error && (error != ENOSPC)) + switch (error) { + case 0: + case ENOSPC: + case EDQUOT: + break; + default: return XFS_ERROR(error); + } /* - * If bmapi returned us nothing, and if we didn't get back EDQUOT, - * then we must have run out of space - flush all other inodes with - * delalloc blocks and retry without EOF preallocation. + * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. For + * ENOSPC, * flush all other inodes with delalloc blocks to free up + * some of the excess reserved metadata space. For both cases, retry + * without EOF preallocation. */ if (nimaps == 0) { trace_xfs_delalloc_enospc(ip, offset, count); if (flushed) - return XFS_ERROR(ENOSPC); + return XFS_ERROR(error ? error : ENOSPC); - xfs_iunlock(ip, XFS_ILOCK_EXCL); - xfs_flush_inodes(ip); - xfs_ilock(ip, XFS_ILOCK_EXCL); + if (error == ENOSPC) { + xfs_iunlock(ip, XFS_ILOCK_EXCL); + xfs_flush_inodes(ip); + xfs_ilock(ip, XFS_ILOCK_EXCL); + } flushed = 1; error = 0; diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index d5710232..f1b094d 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -1101,6 +1101,24 @@ xfs_set_rw_sizes(xfs_mount_t *mp) } /* + * precalculate the low space thresholds for dynamic speculative preallocation. + */ +void +xfs_set_low_space_thresholds( + struct xfs_mount *mp) +{ + int i; + + for (i = 0; i < XFS_LOWSP_MAX; i++) { + __uint64_t space = mp->m_sb.sb_dblocks; + + do_div(space, 100); + mp->m_low_space[i] = space * (i + 1); + } +} + + +/* * Set whether we're using inode alignment. */ STATIC void @@ -1322,6 +1340,9 @@ xfs_mountfs( */ xfs_set_rw_sizes(mp); + /* set the low space thresholds for dynamic preallocation */ + xfs_set_low_space_thresholds(mp); + /* * Set the inode cluster size. * This may still be overridden by the file system diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h index 03ad25c6..7b42e04 100644 --- a/fs/xfs/xfs_mount.h +++ b/fs/xfs/xfs_mount.h @@ -75,6 +75,16 @@ enum { XFS_ICSB_MAX, }; +/* dynamic preallocation free space thresholds, 5% down to 1% */ +enum { + XFS_LOWSP_1_PCNT = 0, + XFS_LOWSP_2_PCNT, + XFS_LOWSP_3_PCNT, + XFS_LOWSP_4_PCNT, + XFS_LOWSP_5_PCNT, + XFS_LOWSP_MAX, +}; + typedef struct xfs_mount { struct super_block *m_super; xfs_tid_t m_tid; /* next unused tid for fs */ @@ -169,6 +179,8 @@ typedef struct xfs_mount { on the next remount,rw */ struct shrinker m_inode_shrink; /* inode reclaim shrinker */ struct percpu_counter m_icsb[XFS_ICSB_MAX]; + int64_t m_low_space[XFS_LOWSP_MAX]; + /* low free space thresholds */ } xfs_mount_t; /* @@ -333,6 +345,8 @@ extern void xfs_icsb_sync_counters(struct xfs_mount *); extern int xfs_icsb_modify_inodes(struct xfs_mount *, int, int64_t); extern int xfs_icsb_modify_free_blocks(struct xfs_mount *, int64_t, int); +extern void xfs_set_low_space_thresholds(struct xfs_mount *); + #endif /* __KERNEL__ */ extern void xfs_mod_sb(struct xfs_trans *, __int64_t); -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7S1VQ244578 for ; Tue, 21 Dec 2010 01:28:01 -0600 X-ASG-Debug-ID: 1292916596-337e02130000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 469901CE33C6 for ; Mon, 20 Dec 2010 23:29:56 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id rXHrsy1h2JeiVjeL for ; Mon, 20 Dec 2010 23:29:56 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50575222-1927428 for ; Tue, 21 Dec 2010 17:59:55 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfI-0001CL-6J for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:44 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwf6-0006Yi-R1 for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:32 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: =?UTF-8?q?=5BPATCH=2001/34=5D=20xfs=3A=20provide=20a=20inode=20iolock=20lockdep=20class?= Subject: =?UTF-8?q?=5BPATCH=2001/34=5D=20xfs=3A=20provide=20a=20inode=20iolock=20lockdep=20class?= Date: Tue, 21 Dec 2010 18:28:57 +1100 Message-Id: <1292916570-25015-2-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292916598 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE_7582B X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE_7582B Custom Rule 7582B X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The XFS iolock needs to be re-initialised to a new lock class before it enters reclaim to prevent lockdep false positives. Unfortunately, this is not sufficient protection as inodes in the XFS_IRECLAIMABLE state can be recycled and not re-initialised before being reused. We need to re-initialise the lock state when transfering out of XFS_IRECLAIMABLE state to XFS_INEW, but we need to keep the same class as if the inode was just allocated. Hence we need a specific lockdep class variable for the iolock so that both initialisations use the same class. While there, add a specific class for inodes in the reclaim state so that it is easy to tell from lockdep reports what state the inode was in that generated the report. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_super.c | 2 ++ fs/xfs/xfs_iget.c | 19 +++++++++++++++++++ fs/xfs/xfs_inode.h | 2 ++ 3 files changed, 23 insertions(+), 0 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index 064f964..c45b323 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -1118,6 +1118,8 @@ xfs_fs_evict_inode( */ ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); + lockdep_set_class_and_name(&ip->i_iolock.mr_lock, + &xfs_iolock_reclaimable, "xfs_iolock_reclaimable"); xfs_inactive(ip); } diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index 0cdd269..cdb1c25 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -43,6 +43,17 @@ /* + * Define xfs inode iolock lockdep classes. We need to ensure that all active + * inodes are considered the same for lockdep purposes, including inodes that + * are recycled through the XFS_IRECLAIMABLE state. This is the the only way to + * guarantee the locks are considered the same when there are multiple lock + * initialisation siteÑ•. Also, define a reclaimable inode class so it is + * obvious in lockdep reports which class the report is against. + */ +static struct lock_class_key xfs_iolock_active; +struct lock_class_key xfs_iolock_reclaimable; + +/* * Allocate and initialise an xfs_inode. */ STATIC struct xfs_inode * @@ -71,6 +82,8 @@ xfs_inode_alloc( ASSERT(completion_done(&ip->i_flush)); mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); + lockdep_set_class_and_name(&ip->i_iolock.mr_lock, + &xfs_iolock_active, "xfs_iolock_active"); /* initialise the xfs inode */ ip->i_ino = ino; @@ -218,6 +231,12 @@ xfs_iget_cache_hit( ip->i_flags |= XFS_INEW; __xfs_inode_clear_reclaim_tag(mp, pag, ip); inode->i_state = I_NEW; + + ASSERT(!rwsem_is_locked(&ip->i_iolock.mr_lock)); + mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); + lockdep_set_class_and_name(&ip->i_iolock.mr_lock, + &xfs_iolock_active, "xfs_iolock_active"); + spin_unlock(&ip->i_flags_lock); write_unlock(&pag->pag_ici_lock); } else { diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h index fb2ca2e..1c6514d 100644 --- a/fs/xfs/xfs_inode.h +++ b/fs/xfs/xfs_inode.h @@ -438,6 +438,8 @@ static inline void xfs_ifunlock(xfs_inode_t *ip) #define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT) #define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT) +extern struct lock_class_key xfs_iolock_reclaimable; + /* * Flags for xfs_itruncate_start(). */ -- 1.7.2.3 From SRS0+CBlE+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:11 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_74 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SB0A244676 for ; Tue, 21 Dec 2010 01:28:11 -0600 X-ASG-Debug-ID: 1292916607-226003180000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 92A031CE33C9 for ; Mon, 20 Dec 2010 23:30:07 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id DlLnsnDp6BZV3VPN for ; Mon, 20 Dec 2010 23:30:07 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50434433-1927428 for ; Tue, 21 Dec 2010 18:00:06 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfS-0001Ct-O9 for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:54 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfH-0006ZC-Cp for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:43 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 11/34] xfs: convert xfsbud shrinker to a per-buftarg shrinker. Subject: [PATCH 11/34] xfs: convert xfsbud shrinker to a per-buftarg shrinker. Date: Tue, 21 Dec 2010 18:29:07 +1100 Message-Id: <1292916570-25015-12-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1292916608 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Before we introduce per-buftarg LRU lists, split the shrinker implementation into per-buftarg shrinker callbacks. At the moment we wake all the xfsbufds to run the delayed write queues to free the dirty buffers and make their pages available for reclaim. However, with an LRU, we want to be able to free clean, unused buffers as well, so we need to separate the xfsbufd from the shrinker callbacks. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig Reviewed-by: Alex Elder --- fs/xfs/linux-2.6/xfs_buf.c | 89 ++++++++++++-------------------------------- fs/xfs/linux-2.6/xfs_buf.h | 4 +- 2 files changed, 27 insertions(+), 66 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c index 4c5deb6..0a00d7a 100644 --- a/fs/xfs/linux-2.6/xfs_buf.c +++ b/fs/xfs/linux-2.6/xfs_buf.c @@ -44,12 +44,7 @@ static kmem_zone_t *xfs_buf_zone; STATIC int xfsbufd(void *); -STATIC int xfsbufd_wakeup(struct shrinker *, int, gfp_t); STATIC void xfs_buf_delwri_queue(xfs_buf_t *, int); -static struct shrinker xfs_buf_shake = { - .shrink = xfsbufd_wakeup, - .seeks = DEFAULT_SEEKS, -}; static struct workqueue_struct *xfslogd_workqueue; struct workqueue_struct *xfsdatad_workqueue; @@ -337,7 +332,6 @@ _xfs_buf_lookup_pages( __func__, gfp_mask); XFS_STATS_INC(xb_page_retries); - xfsbufd_wakeup(NULL, 0, gfp_mask); congestion_wait(BLK_RW_ASYNC, HZ/50); goto retry; } @@ -1461,28 +1455,23 @@ xfs_wait_buftarg( } } -/* - * buftarg list for delwrite queue processing - */ -static LIST_HEAD(xfs_buftarg_list); -static DEFINE_SPINLOCK(xfs_buftarg_lock); - -STATIC void -xfs_register_buftarg( - xfs_buftarg_t *btp) -{ - spin_lock(&xfs_buftarg_lock); - list_add(&btp->bt_list, &xfs_buftarg_list); - spin_unlock(&xfs_buftarg_lock); -} - -STATIC void -xfs_unregister_buftarg( - xfs_buftarg_t *btp) +int +xfs_buftarg_shrink( + struct shrinker *shrink, + int nr_to_scan, + gfp_t mask) { - spin_lock(&xfs_buftarg_lock); - list_del(&btp->bt_list); - spin_unlock(&xfs_buftarg_lock); + struct xfs_buftarg *btp = container_of(shrink, + struct xfs_buftarg, bt_shrinker); + if (nr_to_scan) { + if (test_bit(XBT_FORCE_SLEEP, &btp->bt_flags)) + return -1; + if (list_empty(&btp->bt_delwrite_queue)) + return -1; + set_bit(XBT_FORCE_FLUSH, &btp->bt_flags); + wake_up_process(btp->bt_task); + } + return list_empty(&btp->bt_delwrite_queue) ? -1 : 1; } void @@ -1490,17 +1479,14 @@ xfs_free_buftarg( struct xfs_mount *mp, struct xfs_buftarg *btp) { + unregister_shrinker(&btp->bt_shrinker); + xfs_flush_buftarg(btp, 1); if (mp->m_flags & XFS_MOUNT_BARRIER) xfs_blkdev_issue_flush(btp); iput(btp->bt_mapping->host); - /* Unregister the buftarg first so that we don't get a - * wakeup finding a non-existent task - */ - xfs_unregister_buftarg(btp); kthread_stop(btp->bt_task); - kmem_free(btp); } @@ -1597,20 +1583,13 @@ xfs_alloc_delwrite_queue( xfs_buftarg_t *btp, const char *fsname) { - int error = 0; - - INIT_LIST_HEAD(&btp->bt_list); INIT_LIST_HEAD(&btp->bt_delwrite_queue); spin_lock_init(&btp->bt_delwrite_lock); btp->bt_flags = 0; btp->bt_task = kthread_run(xfsbufd, btp, "xfsbufd/%s", fsname); - if (IS_ERR(btp->bt_task)) { - error = PTR_ERR(btp->bt_task); - goto out_error; - } - xfs_register_buftarg(btp); -out_error: - return error; + if (IS_ERR(btp->bt_task)) + return PTR_ERR(btp->bt_task); + return 0; } xfs_buftarg_t * @@ -1633,6 +1612,9 @@ xfs_alloc_buftarg( goto error; if (xfs_alloc_delwrite_queue(btp, fsname)) goto error; + btp->bt_shrinker.shrink = xfs_buftarg_shrink; + btp->bt_shrinker.seeks = DEFAULT_SEEKS; + register_shrinker(&btp->bt_shrinker); return btp; error: @@ -1737,27 +1719,6 @@ xfs_buf_runall_queues( flush_workqueue(queue); } -STATIC int -xfsbufd_wakeup( - struct shrinker *shrink, - int priority, - gfp_t mask) -{ - xfs_buftarg_t *btp; - - spin_lock(&xfs_buftarg_lock); - list_for_each_entry(btp, &xfs_buftarg_list, bt_list) { - if (test_bit(XBT_FORCE_SLEEP, &btp->bt_flags)) - continue; - if (list_empty(&btp->bt_delwrite_queue)) - continue; - set_bit(XBT_FORCE_FLUSH, &btp->bt_flags); - wake_up_process(btp->bt_task); - } - spin_unlock(&xfs_buftarg_lock); - return 0; -} - /* * Move as many buffers as specified to the supplied list * idicating if we skipped any buffers to prevent deadlocks. @@ -1952,7 +1913,6 @@ xfs_buf_init(void) if (!xfsconvertd_workqueue) goto out_destroy_xfsdatad_workqueue; - register_shrinker(&xfs_buf_shake); return 0; out_destroy_xfsdatad_workqueue: @@ -1968,7 +1928,6 @@ xfs_buf_init(void) void xfs_buf_terminate(void) { - unregister_shrinker(&xfs_buf_shake); destroy_workqueue(xfsconvertd_workqueue); destroy_workqueue(xfsdatad_workqueue); destroy_workqueue(xfslogd_workqueue); diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h index 383a3f3..9344103 100644 --- a/fs/xfs/linux-2.6/xfs_buf.h +++ b/fs/xfs/linux-2.6/xfs_buf.h @@ -128,10 +128,12 @@ typedef struct xfs_buftarg { /* per device delwri queue */ struct task_struct *bt_task; - struct list_head bt_list; struct list_head bt_delwrite_queue; spinlock_t bt_delwrite_lock; unsigned long bt_flags; + + /* LRU control structures */ + struct shrinker bt_shrinker; } xfs_buftarg_t; /* -- 1.7.2.3 From SRS0++ukE+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:11 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SAEh244668 for ; Tue, 21 Dec 2010 01:28:11 -0600 X-ASG-Debug-ID: 1292916606-362f023f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3E899212021 for ; Mon, 20 Dec 2010 23:30:07 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id yptW8qWLIsGZD2iS for ; Mon, 20 Dec 2010 23:30:07 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50071180-1927428 for ; Tue, 21 Dec 2010 18:00:06 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfS-0001Cj-IO for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:54 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfH-0006Z3-7J for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:43 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 08/34] xfs: rcu free inodes Subject: [PATCH 08/34] xfs: rcu free inodes Date: Tue, 21 Dec 2010 18:29:04 +1100 Message-Id: <1292916570-25015-9-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292916608 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.92 X-Barracuda-Spam-Status: No, SCORE=-0.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE_7582B, MARKETING_SUBJECT X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.60 MARKETING_SUBJECT Subject contains popular marketing words 0.50 BSF_RULE_7582B Custom Rule 7582B X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Introduce RCU freeing of XFS inodes so that we can convert lookup traversals to use rcu_read_lock() protection. This patch only introduces the RCU freeing to minimise the potential conflicts with mainline if this is merged into mainline via a VFS patchset. It abuses the i_dentry list for the RCU callback structure because the VFS patches make this a union so it is safe to use like this and simplifies and merge issues. This patch uses basic RCU freeing rather than SLAB_DESTROY_BY_RCU. The later lookup patches need the same "found free inode" protection regardless of the RCU freeing method used, so once again the RCU freeing method can be dealt with apprpriately at merge time without affecting any other code. Signed-off-by: Dave Chinner Reviewed-by: Paul E. McKenney --- fs/xfs/xfs_iget.c | 14 +++++++++++++- 1 files changed, 13 insertions(+), 1 deletions(-) diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index cdb1c25..9fae475 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -105,6 +105,18 @@ xfs_inode_alloc( } void +__xfs_inode_free( + struct rcu_head *head) +{ + struct inode *inode = container_of((void *)head, + struct inode, i_dentry); + struct xfs_inode *ip = XFS_I(inode); + + INIT_LIST_HEAD(&inode->i_dentry); + kmem_zone_free(xfs_inode_zone, ip); +} + +void xfs_inode_free( struct xfs_inode *ip) { @@ -147,7 +159,7 @@ xfs_inode_free( ASSERT(!spin_is_locked(&ip->i_flags_lock)); ASSERT(completion_done(&ip->i_flush)); - kmem_zone_free(xfs_inode_zone, ip); + call_rcu((struct rcu_head *)&VFS_I(ip)->i_dentry, __xfs_inode_free); } /* -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:12 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SBJT244688 for ; Tue, 21 Dec 2010 01:28:12 -0600 X-ASG-Debug-ID: 1292916607-31e801860000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1E876147031B for ; Mon, 20 Dec 2010 23:30:07 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id GlFzec7k2cMMTeaN for ; Mon, 20 Dec 2010 23:30:07 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 39223383-1927428 for ; Tue, 21 Dec 2010 18:00:06 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfc-0001Cp-L9 for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:04 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfH-0006Z9-At for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:43 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 10/34] xfs: convert pag_ici_lock to a spin lock Subject: [PATCH 10/34] xfs: convert pag_ici_lock to a spin lock Date: Tue, 21 Dec 2010 18:29:06 +1100 Message-Id: <1292916570-25015-11-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292916609 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50052 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner now that we are using RCU protection for the inode cache lookups, the lock is only needed on the modification side. Hence it is not necessary for the lock to be a rwlock as there are no read side holders anymore. Convert it to a spin lock to reflect it's exclusive nature. Signed-off-by: Dave Chinner Reviewed-by: Alex Elder Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_sync.c | 8 ++++---- fs/xfs/xfs_ag.h | 2 +- fs/xfs/xfs_iget.c | 10 +++++----- fs/xfs/xfs_mount.c | 2 +- 4 files changed, 11 insertions(+), 11 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c index fd38682..a02480d 100644 --- a/fs/xfs/linux-2.6/xfs_sync.c +++ b/fs/xfs/linux-2.6/xfs_sync.c @@ -620,12 +620,12 @@ xfs_inode_set_reclaim_tag( struct xfs_perag *pag; pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino)); - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); spin_lock(&ip->i_flags_lock); __xfs_inode_set_reclaim_tag(pag, ip); __xfs_iflags_set(ip, XFS_IRECLAIMABLE); spin_unlock(&ip->i_flags_lock); - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); xfs_perag_put(pag); } @@ -833,12 +833,12 @@ reclaim: * added to the tree assert that it's been there before to catch * problems with the inode life time early on. */ - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); if (!radix_tree_delete(&pag->pag_ici_root, XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino))) ASSERT(0); __xfs_inode_clear_reclaim(pag, ip); - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); /* * Here we do an (almost) spurious inode lock in order to coordinate diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h index 63c7a1a..58632cc 100644 --- a/fs/xfs/xfs_ag.h +++ b/fs/xfs/xfs_ag.h @@ -227,7 +227,7 @@ typedef struct xfs_perag { atomic_t pagf_fstrms; /* # of filestreams active in this AG */ - rwlock_t pag_ici_lock; /* incore inode lock */ + spinlock_t pag_ici_lock; /* incore inode cache lock */ struct radix_tree_root pag_ici_root; /* incore inode cache root */ int pag_ici_reclaimable; /* reclaimable inodes */ struct mutex pag_ici_reclaim_lock; /* serialisation point */ diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index 04ed09b..3ecad00 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -260,7 +260,7 @@ xfs_iget_cache_hit( goto out_error; } - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); spin_lock(&ip->i_flags_lock); ip->i_flags &= ~(XFS_IRECLAIMABLE | XFS_IRECLAIM); ip->i_flags |= XFS_INEW; @@ -273,7 +273,7 @@ xfs_iget_cache_hit( &xfs_iolock_active, "xfs_iolock_active"); spin_unlock(&ip->i_flags_lock); - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); } else { /* If the VFS inode is being torn down, pause and try again. */ if (!igrab(inode)) { @@ -351,7 +351,7 @@ xfs_iget_cache_miss( BUG(); } - write_lock(&pag->pag_ici_lock); + spin_lock(&pag->pag_ici_lock); /* insert the new inode */ error = radix_tree_insert(&pag->pag_ici_root, agino, ip); @@ -366,14 +366,14 @@ xfs_iget_cache_miss( ip->i_udquot = ip->i_gdquot = NULL; xfs_iflags_set(ip, XFS_INEW); - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); radix_tree_preload_end(); *ipp = ip; return 0; out_preload_end: - write_unlock(&pag->pag_ici_lock); + spin_unlock(&pag->pag_ici_lock); radix_tree_preload_end(); if (lock_flags) xfs_iunlock(ip, lock_flags); diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c index f1b094d..312c5ce 100644 --- a/fs/xfs/xfs_mount.c +++ b/fs/xfs/xfs_mount.c @@ -598,7 +598,7 @@ xfs_initialize_perag( goto out_unwind; pag->pag_agno = index; pag->pag_mount = mp; - rwlock_init(&pag->pag_ici_lock); + spin_lock_init(&pag->pag_ici_lock); mutex_init(&pag->pag_ici_reclaim_lock); INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC); spin_lock_init(&pag->pag_buf_lock); -- 1.7.2.3 From SRS0++ukE+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:12 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_62 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SCUG244695 for ; Tue, 21 Dec 2010 01:28:12 -0600 X-ASG-Debug-ID: 1292916607-300c02c50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 94DF2212024 for ; Mon, 20 Dec 2010 23:30:08 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id nBqU59KB1bMQQxgI for ; Mon, 20 Dec 2010 23:30:08 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50071179-1927428 for ; Tue, 21 Dec 2010 18:00:06 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfc-0001D5-Pa for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:04 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfH-0006ZF-Ef for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:43 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 12/34] xfs: add a lru to the XFS buffer cache Subject: [PATCH 12/34] xfs: add a lru to the XFS buffer cache Date: Tue, 21 Dec 2010 18:29:08 +1100 Message-Id: <1292916570-25015-13-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292916609 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Introduce a per-buftarg LRU for memory reclaim to operate on. This is the last piece we need to put in place so that we can fully control the buffer lifecycle. This allows XFS to be responsibile for maintaining the working set of buffers under memory pressure instead of relying on the VM reclaim not to take pages we need out from underneath us. The implementation introduces a b_lru_ref counter into the buffer. This is currently set to 1 whenever the buffer is referenced and so is used to determine if the buffer should be added to the LRU or not when freed. Effectively it allows lazy LRU initialisation of the buffer so we do not need to touch the LRU list and locks in xfs_buf_find(). Instead, when the buffer is being released and we drop the last reference to it, we check the b_lru_ref count and if it is none zero we re-add the buffer reference and add the inode to the LRU. The b_lru_ref counter is decremented by the shrinker, and whenever the shrinker comes across a buffer with a zero b_lru_ref counter, if released the LRU reference on the buffer. In the absence of a lookup race, this will result in the buffer being freed. This counting mechanism is used instead of a reference flag so that it is simple to re-introduce buffer-type specific reclaim reference counts to prioritise reclaim more effectively. We still have all those hooks in the XFS code, so this will provide the infrastructure to re-implement that functionality. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_buf.c | 166 ++++++++++++++++++++++++++++++++++++++------ fs/xfs/linux-2.6/xfs_buf.h | 8 ++- 2 files changed, 151 insertions(+), 23 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_buf.c b/fs/xfs/linux-2.6/xfs_buf.c index 0a00d7a..92f1f2a 100644 --- a/fs/xfs/linux-2.6/xfs_buf.c +++ b/fs/xfs/linux-2.6/xfs_buf.c @@ -163,8 +163,79 @@ test_page_region( } /* - * Internal xfs_buf_t object manipulation + * xfs_buf_lru_add - add a buffer to the LRU. + * + * The LRU takes a new reference to the buffer so that it will only be freed + * once the shrinker takes the buffer off the LRU. */ +STATIC void +xfs_buf_lru_add( + struct xfs_buf *bp) +{ + struct xfs_buftarg *btp = bp->b_target; + + spin_lock(&btp->bt_lru_lock); + if (list_empty(&bp->b_lru)) { + atomic_inc(&bp->b_hold); + list_add_tail(&bp->b_lru, &btp->bt_lru); + btp->bt_lru_nr++; + } + spin_unlock(&btp->bt_lru_lock); +} + +/* + * xfs_buf_lru_del - remove a buffer from the LRU + * + * The unlocked check is safe here because it only occurs when there are not + * b_lru_ref counts left on the inode under the pag->pag_buf_lock. it is there + * to optimise the shrinker removing the buffer from the LRU and calling + * xfs_buf_free(). i.e. it removes an unneccessary round trip on the + * bt_lru_lock. + */ +STATIC void +xfs_buf_lru_del( + struct xfs_buf *bp) +{ + struct xfs_buftarg *btp = bp->b_target; + + if (list_empty(&bp->b_lru)) + return; + + spin_lock(&btp->bt_lru_lock); + if (!list_empty(&bp->b_lru)) { + list_del_init(&bp->b_lru); + btp->bt_lru_nr--; + } + spin_unlock(&btp->bt_lru_lock); +} + +/* + * When we mark a buffer stale, we remove the buffer from the LRU and clear the + * b_lru_ref count so that the buffer is freed immediately when the buffer + * reference count falls to zero. If the buffer is already on the LRU, we need + * to remove the reference that LRU holds on the buffer. + * + * This prevents build-up of stale buffers on the LRU. + */ +void +xfs_buf_stale( + struct xfs_buf *bp) +{ + bp->b_flags |= XBF_STALE; + atomic_set(&(bp)->b_lru_ref, 0); + if (!list_empty(&bp->b_lru)) { + struct xfs_buftarg *btp = bp->b_target; + + spin_lock(&btp->bt_lru_lock); + if (!list_empty(&bp->b_lru)) { + list_del_init(&bp->b_lru); + btp->bt_lru_nr--; + atomic_dec(&bp->b_hold); + } + spin_unlock(&btp->bt_lru_lock); + } + ASSERT(atomic_read(&bp->b_hold) >= 1); +} STATIC void _xfs_buf_initialize( @@ -181,7 +252,9 @@ _xfs_buf_initialize( memset(bp, 0, sizeof(xfs_buf_t)); atomic_set(&bp->b_hold, 1); + atomic_set(&bp->b_lru_ref, 1); init_completion(&bp->b_iowait); + INIT_LIST_HEAD(&bp->b_lru); INIT_LIST_HEAD(&bp->b_list); RB_CLEAR_NODE(&bp->b_rbnode); sema_init(&bp->b_sema, 0); /* held, no waiters */ @@ -257,6 +330,8 @@ xfs_buf_free( { trace_xfs_buf_free(bp, _RET_IP_); + ASSERT(list_empty(&bp->b_lru)); + if (bp->b_flags & (_XBF_PAGE_CACHE|_XBF_PAGES)) { uint i; @@ -822,6 +897,7 @@ xfs_buf_rele( if (!pag) { ASSERT(!bp->b_relse); + ASSERT(list_empty(&bp->b_lru)); ASSERT(RB_EMPTY_NODE(&bp->b_rbnode)); if (atomic_dec_and_test(&bp->b_hold)) xfs_buf_free(bp); @@ -829,13 +905,19 @@ xfs_buf_rele( } ASSERT(!RB_EMPTY_NODE(&bp->b_rbnode)); + ASSERT(atomic_read(&bp->b_hold) > 0); if (atomic_dec_and_lock(&bp->b_hold, &pag->pag_buf_lock)) { if (bp->b_relse) { atomic_inc(&bp->b_hold); spin_unlock(&pag->pag_buf_lock); bp->b_relse(bp); + } else if (!(bp->b_flags & XBF_STALE) && + atomic_read(&bp->b_lru_ref)) { + xfs_buf_lru_add(bp); + spin_unlock(&pag->pag_buf_lock); } else { + xfs_buf_lru_del(bp); ASSERT(!(bp->b_flags & (XBF_DELWRI|_XBF_DELWRI_Q))); rb_erase(&bp->b_rbnode, &pag->pag_buf_tree); spin_unlock(&pag->pag_buf_lock); @@ -1432,27 +1514,35 @@ xfs_buf_iomove( */ /* - * Wait for any bufs with callbacks that have been submitted but - * have not yet returned... walk the hash list for the target. + * Wait for any bufs with callbacks that have been submitted but have not yet + * returned. These buffers will have an elevated hold count, so wait on those + * while freeing all the buffers only held by the LRU. */ void xfs_wait_buftarg( struct xfs_buftarg *btp) { - struct xfs_perag *pag; - uint i; + struct xfs_buf *bp; - for (i = 0; i < btp->bt_mount->m_sb.sb_agcount; i++) { - pag = xfs_perag_get(btp->bt_mount, i); - spin_lock(&pag->pag_buf_lock); - while (rb_first(&pag->pag_buf_tree)) { - spin_unlock(&pag->pag_buf_lock); +restart: + spin_lock(&btp->bt_lru_lock); + while (!list_empty(&btp->bt_lru)) { + bp = list_first_entry(&btp->bt_lru, struct xfs_buf, b_lru); + if (atomic_read(&bp->b_hold) > 1) { + spin_unlock(&btp->bt_lru_lock); delay(100); - spin_lock(&pag->pag_buf_lock); + goto restart; } - spin_unlock(&pag->pag_buf_lock); - xfs_perag_put(pag); + /* + * clear the LRU reference count so the bufer doesn't get + * ignored in xfs_buf_rele(). + */ + atomic_set(&bp->b_lru_ref, 0); + spin_unlock(&btp->bt_lru_lock); + xfs_buf_rele(bp); + spin_lock(&btp->bt_lru_lock); } + spin_unlock(&btp->bt_lru_lock); } int @@ -1463,15 +1553,45 @@ xfs_buftarg_shrink( { struct xfs_buftarg *btp = container_of(shrink, struct xfs_buftarg, bt_shrinker); - if (nr_to_scan) { - if (test_bit(XBT_FORCE_SLEEP, &btp->bt_flags)) - return -1; - if (list_empty(&btp->bt_delwrite_queue)) - return -1; - set_bit(XBT_FORCE_FLUSH, &btp->bt_flags); - wake_up_process(btp->bt_task); + struct xfs_buf *bp; + LIST_HEAD(dispose); + + if (!nr_to_scan) + return btp->bt_lru_nr; + + spin_lock(&btp->bt_lru_lock); + while (!list_empty(&btp->bt_lru)) { + if (nr_to_scan-- <= 0) + break; + + bp = list_first_entry(&btp->bt_lru, struct xfs_buf, b_lru); + + /* + * Decrement the b_lru_ref count unless the value is already + * zero. If the value is already zero, we need to reclaim the + * buffer, otherwise it gets another trip through the LRU. + */ + if (!atomic_add_unless(&bp->b_lru_ref, -1, 0)) { + list_move_tail(&bp->b_lru, &btp->bt_lru); + continue; + } + + /* + * remove the buffer from the LRU now to avoid needing another + * lock round trip inside xfs_buf_rele(). + */ + list_move(&bp->b_lru, &dispose); + btp->bt_lru_nr--; } - return list_empty(&btp->bt_delwrite_queue) ? -1 : 1; + spin_unlock(&btp->bt_lru_lock); + + while (!list_empty(&dispose)) { + bp = list_first_entry(&dispose, struct xfs_buf, b_lru); + list_del_init(&bp->b_lru); + xfs_buf_rele(bp); + } + + return btp->bt_lru_nr; } void @@ -1606,6 +1726,8 @@ xfs_alloc_buftarg( btp->bt_mount = mp; btp->bt_dev = bdev->bd_dev; btp->bt_bdev = bdev; + INIT_LIST_HEAD(&btp->bt_lru); + spin_lock_init(&btp->bt_lru_lock); if (xfs_setsize_buftarg_early(btp, bdev)) goto error; if (xfs_mapping_buftarg(btp, bdev)) diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h index 9344103..4601eab 100644 --- a/fs/xfs/linux-2.6/xfs_buf.h +++ b/fs/xfs/linux-2.6/xfs_buf.h @@ -134,6 +134,9 @@ typedef struct xfs_buftarg { /* LRU control structures */ struct shrinker bt_shrinker; + struct list_head bt_lru; + spinlock_t bt_lru_lock; + unsigned int bt_lru_nr; } xfs_buftarg_t; /* @@ -166,9 +169,11 @@ typedef struct xfs_buf { xfs_off_t b_file_offset; /* offset in file */ size_t b_buffer_length;/* size of buffer in bytes */ atomic_t b_hold; /* reference count */ + atomic_t b_lru_ref; /* lru reclaim ref count */ xfs_buf_flags_t b_flags; /* status flags */ struct semaphore b_sema; /* semaphore for lockables */ + struct list_head b_lru; /* lru list */ wait_queue_head_t b_waiters; /* unpin waiters */ struct list_head b_list; struct xfs_perag *b_pag; /* contains rbtree root */ @@ -266,7 +271,8 @@ extern void xfs_buf_terminate(void); #define XFS_BUF_ZEROFLAGS(bp) ((bp)->b_flags &= \ ~(XBF_READ|XBF_WRITE|XBF_ASYNC|XBF_DELWRI|XBF_ORDERED)) -#define XFS_BUF_STALE(bp) ((bp)->b_flags |= XBF_STALE) +void xfs_buf_stale(struct xfs_buf *bp); +#define XFS_BUF_STALE(bp) xfs_buf_stale(bp); #define XFS_BUF_UNSTALE(bp) ((bp)->b_flags &= ~XBF_STALE) #define XFS_BUF_ISSTALE(bp) ((bp)->b_flags & XBF_STALE) #define XFS_BUF_SUPER_STALE(bp) do { \ -- 1.7.2.3 From SRS0+K7iM+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:13 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SCbX244706 for ; Tue, 21 Dec 2010 01:28:12 -0600 X-ASG-Debug-ID: 1292916607-362b021b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B566A212027 for ; Mon, 20 Dec 2010 23:30:08 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id jxiE0AZb4nEF4GGa for ; Mon, 20 Dec 2010 23:30:08 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 5388607-1927428 for ; Tue, 21 Dec 2010 18:00:06 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfS-0001Cl-Kj for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:54 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfH-0006Z6-8x for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:43 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 09/34] xfs: convert inode cache lookups to use RCU locking Subject: [PATCH 09/34] xfs: convert inode cache lookups to use RCU locking Date: Tue, 21 Dec 2010 18:29:05 +1100 Message-Id: <1292916570-25015-10-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292916609 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner With delayed logging greatly increasing the sustained parallelism of inode operations, the inode cache locking is showing significant read vs write contention when inode reclaim runs at the same time as lookups. There is also a lot more write lock acquistions than there are read locks (4:1 ratio) so the read locking is not really buying us much in the way of parallelism. To avoid the read vs write contention, change the cache to use RCU locking on the read side. To avoid needing to RCU free every single inode, use the built in slab RCU freeing mechanism. This requires us to be able to detect lookups of freed inodes, so enÑ•ure that ever freed inode has an inode number of zero and the XFS_IRECLAIM flag set. We already check the XFS_IRECLAIM flag in cache hit lookup path, but also add a check for a zero inode number as well. We canthen convert all the read locking lockups to use RCU read side locking and hence remove all read side locking. Signed-off-by: Dave Chinner Reviewed-by: Alex Elder --- fs/xfs/linux-2.6/xfs_sync.c | 84 +++++++++++++++++++++++++++++++++--------- fs/xfs/xfs_iget.c | 47 ++++++++++++++++++------ fs/xfs/xfs_inode.c | 52 ++++++++++++++++++++------ 3 files changed, 141 insertions(+), 42 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_sync.c b/fs/xfs/linux-2.6/xfs_sync.c index afb0d7c..fd38682 100644 --- a/fs/xfs/linux-2.6/xfs_sync.c +++ b/fs/xfs/linux-2.6/xfs_sync.c @@ -53,14 +53,30 @@ xfs_inode_ag_walk_grab( { struct inode *inode = VFS_I(ip); + ASSERT(rcu_read_lock_held()); + + /* + * check for stale RCU freed inode + * + * If the inode has been reallocated, it doesn't matter if it's not in + * the AG we are walking - we are walking for writeback, so if it + * passes all the "valid inode" checks and is dirty, then we'll write + * it back anyway. If it has been reallocated and still being + * initialised, the XFS_INEW check below will catch it. + */ + spin_lock(&ip->i_flags_lock); + if (!ip->i_ino) + goto out_unlock_noent; + + /* avoid new or reclaimable inodes. Leave for reclaim code to flush */ + if (__xfs_iflags_test(ip, XFS_INEW | XFS_IRECLAIMABLE | XFS_IRECLAIM)) + goto out_unlock_noent; + spin_unlock(&ip->i_flags_lock); + /* nothing to sync during shutdown */ if (XFS_FORCED_SHUTDOWN(ip->i_mount)) return EFSCORRUPTED; - /* avoid new or reclaimable inodes. Leave for reclaim code to flush */ - if (xfs_iflags_test(ip, XFS_INEW | XFS_IRECLAIMABLE | XFS_IRECLAIM)) - return ENOENT; - /* If we can't grab the inode, it must on it's way to reclaim. */ if (!igrab(inode)) return ENOENT; @@ -72,6 +88,10 @@ xfs_inode_ag_walk_grab( /* inode is valid */ return 0; + +out_unlock_noent: + spin_unlock(&ip->i_flags_lock); + return ENOENT; } STATIC int @@ -98,12 +118,12 @@ restart: int error = 0; int i; - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void **)batch, first_index, XFS_LOOKUP_BATCH); if (!nr_found) { - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); break; } @@ -118,18 +138,26 @@ restart: batch[i] = NULL; /* - * Update the index for the next lookup. Catch overflows - * into the next AG range which can occur if we have inodes - * in the last block of the AG and we are currently - * pointing to the last inode. + * Update the index for the next lookup. Catch + * overflows into the next AG range which can occur if + * we have inodes in the last block of the AG and we + * are currently pointing to the last inode. + * + * Because we may see inodes that are from the wrong AG + * due to RCU freeing and reallocation, only update the + * index if it lies in this AG. It was a race that lead + * us to see this inode, so another lookup from the + * same index will not find it again. */ + if (XFS_INO_TO_AGNO(mp, ip->i_ino) != pag->pag_agno) + continue; first_index = XFS_INO_TO_AGINO(mp, ip->i_ino + 1); if (first_index < XFS_INO_TO_AGINO(mp, ip->i_ino)) done = 1; } /* unlock now we've grabbed the inodes. */ - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); for (i = 0; i < nr_found; i++) { if (!batch[i]) @@ -639,9 +667,14 @@ xfs_reclaim_inode_grab( struct xfs_inode *ip, int flags) { + ASSERT(rcu_read_lock_held()); + + /* quick check for stale RCU freed inode */ + if (!ip->i_ino) + return 1; /* - * do some unlocked checks first to avoid unnecceary lock traffic. + * do some unlocked checks first to avoid unnecessary lock traffic. * The first is a flush lock check, the second is a already in reclaim * check. Only do these checks if we are not going to block on locks. */ @@ -654,11 +687,16 @@ xfs_reclaim_inode_grab( * The radix tree lock here protects a thread in xfs_iget from racing * with us starting reclaim on the inode. Once we have the * XFS_IRECLAIM flag set it will not touch us. + * + * Due to RCU lookup, we may find inodes that have been freed and only + * have XFS_IRECLAIM set. Indeed, we may see reallocated inodes that + * aren't candidates for reclaim at all, so we must check the + * XFS_IRECLAIMABLE is set first before proceeding to reclaim. */ spin_lock(&ip->i_flags_lock); - ASSERT_ALWAYS(__xfs_iflags_test(ip, XFS_IRECLAIMABLE)); - if (__xfs_iflags_test(ip, XFS_IRECLAIM)) { - /* ignore as it is already under reclaim */ + if (!__xfs_iflags_test(ip, XFS_IRECLAIMABLE) || + __xfs_iflags_test(ip, XFS_IRECLAIM)) { + /* not a reclaim candidate. */ spin_unlock(&ip->i_flags_lock); return 1; } @@ -864,14 +902,14 @@ restart: struct xfs_inode *batch[XFS_LOOKUP_BATCH]; int i; - write_lock(&pag->pag_ici_lock); + rcu_read_lock(); nr_found = radix_tree_gang_lookup_tag( &pag->pag_ici_root, (void **)batch, first_index, XFS_LOOKUP_BATCH, XFS_ICI_RECLAIM_TAG); if (!nr_found) { - write_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); break; } @@ -891,14 +929,24 @@ restart: * occur if we have inodes in the last block of * the AG and we are currently pointing to the * last inode. + * + * Because we may see inodes that are from the + * wrong AG due to RCU freeing and + * reallocation, only update the index if it + * lies in this AG. It was a race that lead us + * to see this inode, so another lookup from + * the same index will not find it again. */ + if (XFS_INO_TO_AGNO(mp, ip->i_ino) != + pag->pag_agno) + continue; first_index = XFS_INO_TO_AGINO(mp, ip->i_ino + 1); if (first_index < XFS_INO_TO_AGINO(mp, ip->i_ino)) done = 1; } /* unlock now we've grabbed the inodes. */ - write_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); for (i = 0; i < nr_found; i++) { if (!batch[i]) diff --git a/fs/xfs/xfs_iget.c b/fs/xfs/xfs_iget.c index 9fae475..04ed09b 100644 --- a/fs/xfs/xfs_iget.c +++ b/fs/xfs/xfs_iget.c @@ -80,6 +80,7 @@ xfs_inode_alloc( ASSERT(atomic_read(&ip->i_pincount) == 0); ASSERT(!spin_is_locked(&ip->i_flags_lock)); ASSERT(completion_done(&ip->i_flush)); + ASSERT(ip->i_ino == 0); mrlock_init(&ip->i_iolock, MRLOCK_BARRIER, "xfsio", ip->i_ino); lockdep_set_class_and_name(&ip->i_iolock.mr_lock, @@ -98,9 +99,6 @@ xfs_inode_alloc( ip->i_size = 0; ip->i_new_size = 0; - /* prevent anyone from using this yet */ - VFS_I(ip)->i_state = I_NEW; - return ip; } @@ -159,6 +157,16 @@ xfs_inode_free( ASSERT(!spin_is_locked(&ip->i_flags_lock)); ASSERT(completion_done(&ip->i_flush)); + /* + * Because we use RCU freeing we need to ensure the inode always + * appears to be reclaimed with an invalid inode number when in the + * free state. The ip->i_flags_lock provides the barrier against lookup + * races. + */ + spin_lock(&ip->i_flags_lock); + ip->i_flags = XFS_IRECLAIM; + ip->i_ino = 0; + spin_unlock(&ip->i_flags_lock); call_rcu((struct rcu_head *)&VFS_I(ip)->i_dentry, __xfs_inode_free); } @@ -169,14 +177,29 @@ static int xfs_iget_cache_hit( struct xfs_perag *pag, struct xfs_inode *ip, + xfs_ino_t ino, int flags, - int lock_flags) __releases(pag->pag_ici_lock) + int lock_flags) __releases(RCU) { struct inode *inode = VFS_I(ip); struct xfs_mount *mp = ip->i_mount; int error; + /* + * check for re-use of an inode within an RCU grace period due to the + * radix tree nodes not being updated yet. We monitor for this by + * setting the inode number to zero before freeing the inode structure. + * If the inode has been reallocated and set up, then the inode number + * will not match, so check for that, too. + */ spin_lock(&ip->i_flags_lock); + if (ip->i_ino != ino) { + trace_xfs_iget_skip(ip); + XFS_STATS_INC(xs_ig_frecycle); + error = EAGAIN; + goto out_error; + } + /* * If we are racing with another cache hit that is currently @@ -219,7 +242,7 @@ xfs_iget_cache_hit( ip->i_flags |= XFS_IRECLAIM; spin_unlock(&ip->i_flags_lock); - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); error = -inode_init_always(mp->m_super, inode); if (error) { @@ -227,7 +250,7 @@ xfs_iget_cache_hit( * Re-initializing the inode failed, and we are in deep * trouble. Try to re-add it to the reclaim list. */ - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); spin_lock(&ip->i_flags_lock); ip->i_flags &= ~XFS_INEW; @@ -261,7 +284,7 @@ xfs_iget_cache_hit( /* We've got a live one. */ spin_unlock(&ip->i_flags_lock); - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); trace_xfs_iget_hit(ip); } @@ -275,7 +298,7 @@ xfs_iget_cache_hit( out_error: spin_unlock(&ip->i_flags_lock); - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); return error; } @@ -397,7 +420,7 @@ xfs_iget( xfs_agino_t agino; /* reject inode numbers outside existing AGs */ - if (XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) + if (!ino || XFS_INO_TO_AGNO(mp, ino) >= mp->m_sb.sb_agcount) return EINVAL; /* get the perag structure and ensure that it's inode capable */ @@ -406,15 +429,15 @@ xfs_iget( again: error = 0; - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); ip = radix_tree_lookup(&pag->pag_ici_root, agino); if (ip) { - error = xfs_iget_cache_hit(pag, ip, flags, lock_flags); + error = xfs_iget_cache_hit(pag, ip, ino, flags, lock_flags); if (error) goto out_error_or_again; } else { - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); XFS_STATS_INC(xs_ig_missed); error = xfs_iget_cache_miss(mp, pag, tp, ino, &ip, diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 108c7a0..43ffd90 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -2000,17 +2000,33 @@ xfs_ifree_cluster( */ for (i = 0; i < ninodes; i++) { retry: - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); ip = radix_tree_lookup(&pag->pag_ici_root, XFS_INO_TO_AGINO(mp, (inum + i))); - /* Inode not in memory or stale, nothing to do */ - if (!ip || xfs_iflags_test(ip, XFS_ISTALE)) { - read_unlock(&pag->pag_ici_lock); + /* Inode not in memory, nothing to do */ + if (!ip) { + rcu_read_unlock(); continue; } /* + * because this is an RCU protected lookup, we could + * find a recently freed or even reallocated inode + * during the lookup. We need to check under the + * i_flags_lock for a valid inode here. Skip it if it + * is not valid, the wrong inode or stale. + */ + spin_lock(&ip->i_flags_lock); + if (ip->i_ino != inum + i || + __xfs_iflags_test(ip, XFS_ISTALE)) { + spin_unlock(&ip->i_flags_lock); + rcu_read_unlock(); + continue; + } + spin_unlock(&ip->i_flags_lock); + + /* * Don't try to lock/unlock the current inode, but we * _cannot_ skip the other inodes that we did not find * in the list attached to the buffer and are not @@ -2019,11 +2035,11 @@ retry: */ if (ip != free_ip && !xfs_ilock_nowait(ip, XFS_ILOCK_EXCL)) { - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); delay(1); goto retry; } - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); xfs_iflock(ip); xfs_iflags_set(ip, XFS_ISTALE); @@ -2629,7 +2645,7 @@ xfs_iflush_cluster( mask = ~(((XFS_INODE_CLUSTER_SIZE(mp) >> mp->m_sb.sb_inodelog)) - 1); first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask; - read_lock(&pag->pag_ici_lock); + rcu_read_lock(); /* really need a gang lookup range call here */ nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)ilist, first_index, inodes_per_cluster); @@ -2640,9 +2656,21 @@ xfs_iflush_cluster( iq = ilist[i]; if (iq == ip) continue; - /* if the inode lies outside this cluster, we're done. */ - if ((XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) - break; + + /* + * because this is an RCU protected lookup, we could find a + * recently freed or even reallocated inode during the lookup. + * We need to check under the i_flags_lock for a valid inode + * here. Skip it if it is not valid or the wrong inode. + */ + spin_lock(&ip->i_flags_lock); + if (!ip->i_ino || + (XFS_INO_TO_AGINO(mp, iq->i_ino) & mask) != first_index) { + spin_unlock(&ip->i_flags_lock); + continue; + } + spin_unlock(&ip->i_flags_lock); + /* * Do an un-protected check to see if the inode is dirty and * is a candidate for flushing. These checks will be repeated @@ -2692,7 +2720,7 @@ xfs_iflush_cluster( } out_free: - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); kmem_free(ilist); out_put: xfs_perag_put(pag); @@ -2704,7 +2732,7 @@ cluster_corrupt_out: * Corruption detected in the clustering loop. Invalidate the * inode buffer and shut down the filesystem. */ - read_unlock(&pag->pag_ici_lock); + rcu_read_unlock(); /* * Clean up the buffer. If it was B_DELWRI, just release it -- * brelse can handle it with no problems. If not, shut down the -- 1.7.2.3 From SRS0++ukE+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:19 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_64 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SJsD244766 for ; Tue, 21 Dec 2010 01:28:19 -0600 X-ASG-Debug-ID: 1292916614-225d030c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A5E071CE33CF for ; Mon, 20 Dec 2010 23:30:15 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id 23fBXege6jjf1Yxb for ; Mon, 20 Dec 2010 23:30:15 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50071192-1927428 for ; Tue, 21 Dec 2010 18:00:14 +1030 (CDT) Received: from [192.168.1.1] (helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfc-0001D1-W1 for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:05 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfH-0006ZP-NJ for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:43 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 16/34] xfs: clean up xfs_ail_delete() Subject: [PATCH 16/34] xfs: clean up xfs_ail_delete() Date: Tue, 21 Dec 2010 18:29:12 +1100 Message-Id: <1292916570-25015-17-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292916616 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner xfs_ail_delete() has a needlessly complex interface. It returns the log item that was passed in for deletion (which the callers then assert is identical to the one passed in), and callers of xfs_ail_delete() still need to invalidate current traversal cursors. Make xfs_ail_delete() return void, move the cursor invalidation inside it, and clean up the callers just to use the log item pointer they passed in. While cleaning up, remove the messy and unnecessary "/* ARGUSED */" comments around all these functions. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_trans_ail.c | 27 +++++++-------------------- 1 files changed, 7 insertions(+), 20 deletions(-) diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index dc90695..645928c 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -29,7 +29,7 @@ #include "xfs_error.h" STATIC void xfs_ail_insert(struct xfs_ail *, xfs_log_item_t *); -STATIC xfs_log_item_t * xfs_ail_delete(struct xfs_ail *, xfs_log_item_t *); +STATIC void xfs_ail_delete(struct xfs_ail *, xfs_log_item_t *); STATIC xfs_log_item_t * xfs_ail_min(struct xfs_ail *); STATIC xfs_log_item_t * xfs_ail_next(struct xfs_ail *, xfs_log_item_t *); @@ -468,16 +468,13 @@ xfs_trans_ail_update( xfs_log_item_t *lip, xfs_lsn_t lsn) __releases(ailp->xa_lock) { - xfs_log_item_t *dlip = NULL; xfs_log_item_t *mlip; /* ptr to minimum lip */ xfs_lsn_t tail_lsn; mlip = xfs_ail_min(ailp); if (lip->li_flags & XFS_LI_IN_AIL) { - dlip = xfs_ail_delete(ailp, lip); - ASSERT(dlip == lip); - xfs_trans_ail_cursor_clear(ailp, dlip); + xfs_ail_delete(ailp, lip); } else { lip->li_flags |= XFS_LI_IN_AIL; } @@ -485,7 +482,7 @@ xfs_trans_ail_update( lip->li_lsn = lsn; xfs_ail_insert(ailp, lip); - if (mlip == dlip) { + if (mlip == lip) { mlip = xfs_ail_min(ailp); /* * It is not safe to access mlip after the AIL lock is @@ -524,21 +521,18 @@ xfs_trans_ail_delete( struct xfs_ail *ailp, xfs_log_item_t *lip) __releases(ailp->xa_lock) { - xfs_log_item_t *dlip; xfs_log_item_t *mlip; xfs_lsn_t tail_lsn; if (lip->li_flags & XFS_LI_IN_AIL) { mlip = xfs_ail_min(ailp); - dlip = xfs_ail_delete(ailp, lip); - ASSERT(dlip == lip); - xfs_trans_ail_cursor_clear(ailp, dlip); + xfs_ail_delete(ailp, lip); lip->li_flags &= ~XFS_LI_IN_AIL; lip->li_lsn = 0; - if (mlip == dlip) { + if (mlip == lip) { mlip = xfs_ail_min(ailp); /* * It is not safe to access mlip after the AIL lock @@ -632,7 +626,6 @@ STATIC void xfs_ail_insert( struct xfs_ail *ailp, xfs_log_item_t *lip) -/* ARGSUSED */ { xfs_log_item_t *next_lip; @@ -661,18 +654,14 @@ xfs_ail_insert( /* * Delete the given item from the AIL. Return a pointer to the item. */ -/*ARGSUSED*/ -STATIC xfs_log_item_t * +STATIC void xfs_ail_delete( struct xfs_ail *ailp, xfs_log_item_t *lip) -/* ARGSUSED */ { xfs_ail_check(ailp, lip); - list_del(&lip->li_ail); - - return lip; + xfs_trans_ail_cursor_clear(ailp, lip); } /* @@ -682,7 +671,6 @@ xfs_ail_delete( STATIC xfs_log_item_t * xfs_ail_min( struct xfs_ail *ailp) -/* ARGSUSED */ { if (list_empty(&ailp->xa_ail)) return NULL; @@ -699,7 +687,6 @@ STATIC xfs_log_item_t * xfs_ail_next( struct xfs_ail *ailp, xfs_log_item_t *lip) -/* ARGSUSED */ { if (lip->li_ail.next == &ailp->xa_ail) return NULL; -- 1.7.2.3 From SRS0+p6vy+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:13 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SDPC244710 for ; Tue, 21 Dec 2010 01:28:13 -0600 X-ASG-Debug-ID: 1292916608-28a402d60000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0AB681CE33CC for ; Mon, 20 Dec 2010 23:30:08 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id 8k7Ink2F0QiLf0GU for ; Mon, 20 Dec 2010 23:30:08 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50692765-1927428 for ; Tue, 21 Dec 2010 18:00:07 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfT-0001D0-0B for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:55 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfH-0006ZN-Jx for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:43 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 15/34] xfs: Pull EFI/EFD handling out from under the AIL lock Subject: [PATCH 15/34] xfs: Pull EFI/EFD handling out from under the AIL lock Date: Tue, 21 Dec 2010 18:29:11 +1100 Message-Id: <1292916570-25015-16-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1292916610 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner EFI/EFD interactions are protected from races by the AIL lock. They are the only type of log items that require the the AIL lock to serialise internal state, so they need to be separated from the AIL lock before we can do bulk insert operations on the AIL. To acheive this, convert the counter of the number of extents in the EFI to an atomic so it can be safely manipulated by EFD processing without locks. Also, convert the EFI state flag manipulations to use atomic bit operations so no locks are needed to record state changes. Finally, use the state bits to determine when it is safe to free the EFI and clean up the code to do this neatly. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_extfree_item.c | 81 ++++++++++++++++++++++++-------------------- fs/xfs/xfs_extfree_item.h | 10 +++--- fs/xfs/xfs_log_recover.c | 9 ++--- fs/xfs/xfs_trans_extfree.c | 8 +++- 4 files changed, 59 insertions(+), 49 deletions(-) diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c index 5997efa..75f2ef6 100644 --- a/fs/xfs/xfs_extfree_item.c +++ b/fs/xfs/xfs_extfree_item.c @@ -48,6 +48,28 @@ xfs_efi_item_free( } /* + * Freeing the efi requires that we remove it from the AIL if it has already + * been placed there. However, the EFI may not yet have been placed in the AIL + * when called by xfs_efi_release() from EFD processing due to the ordering of + * committed vs unpin operations in bulk insert operations. Hence the + * test_and_clear_bit(XFS_EFI_COMMITTED) to ensure only the last caller frees + * the EFI. + */ +STATIC void +__xfs_efi_release( + struct xfs_efi_log_item *efip) +{ + struct xfs_ail *ailp = efip->efi_item.li_ailp; + + if (!test_and_clear_bit(XFS_EFI_COMMITTED, &efip->efi_flags)) { + spin_lock(&ailp->xa_lock); + /* xfs_trans_ail_delete() drops the AIL lock. */ + xfs_trans_ail_delete(ailp, &efip->efi_item); + xfs_efi_item_free(efip); + } +} + +/* * This returns the number of iovecs needed to log the given efi item. * We only need 1 iovec for an efi item. It just logs the efi_log_format * structure. @@ -74,7 +96,8 @@ xfs_efi_item_format( struct xfs_efi_log_item *efip = EFI_ITEM(lip); uint size; - ASSERT(efip->efi_next_extent == efip->efi_format.efi_nextents); + ASSERT(atomic_read(&efip->efi_next_extent) == + efip->efi_format.efi_nextents); efip->efi_format.efi_type = XFS_LI_EFI; @@ -103,7 +126,8 @@ xfs_efi_item_pin( * which the EFI is manipulated during a transaction. If we are being asked to * remove the EFI it's because the transaction has been cancelled and by * definition that means the EFI cannot be in the AIL so remove it from the - * transaction and free it. + * transaction and free it. Otherwise coordinate with xfs_efi_release() (via + * XFS_EFI_COMMITTED) to determine who gets to free the EFI. */ STATIC void xfs_efi_item_unpin( @@ -111,17 +135,14 @@ xfs_efi_item_unpin( int remove) { struct xfs_efi_log_item *efip = EFI_ITEM(lip); - struct xfs_ail *ailp = lip->li_ailp; - spin_lock(&ailp->xa_lock); if (remove) { ASSERT(!(lip->li_flags & XFS_LI_IN_AIL)); xfs_trans_del_item(lip); xfs_efi_item_free(efip); - } else { - efip->efi_flags |= XFS_EFI_COMMITTED; + return; } - spin_unlock(&ailp->xa_lock); + __xfs_efi_release(efip); } /* @@ -150,16 +171,20 @@ xfs_efi_item_unlock( } /* - * The EFI is logged only once and cannot be moved in the log, so - * simply return the lsn at which it's been logged. The canceled - * flag is not paid any attention here. Checking for that is delayed - * until the EFI is unpinned. + * The EFI is logged only once and cannot be moved in the log, so simply return + * the lsn at which it's been logged. For bulk transaction committed + * processing, the EFI may be processed but not yet unpinned prior to the EFD + * being processed. Set the XFS_EFI_COMMITTED flag so this case can be detected + * when processing the EFD. */ STATIC xfs_lsn_t xfs_efi_item_committed( struct xfs_log_item *lip, xfs_lsn_t lsn) { + struct xfs_efi_log_item *efip = EFI_ITEM(lip); + + set_bit(XFS_EFI_COMMITTED, &efip->efi_flags); return lsn; } @@ -228,6 +253,7 @@ xfs_efi_init( xfs_log_item_init(mp, &efip->efi_item, XFS_LI_EFI, &xfs_efi_item_ops); efip->efi_format.efi_nextents = nextents; efip->efi_format.efi_id = (__psint_t)(void*)efip; + atomic_set(&efip->efi_next_extent, 0); return efip; } @@ -287,37 +313,18 @@ xfs_efi_copy_format(xfs_log_iovec_t *buf, xfs_efi_log_format_t *dst_efi_fmt) } /* - * This is called by the efd item code below to release references to - * the given efi item. Each efd calls this with the number of - * extents that it has logged, and when the sum of these reaches - * the total number of extents logged by this efi item we can free - * the efi item. - * - * Freeing the efi item requires that we remove it from the AIL. - * We'll use the AIL lock to protect our counters as well as - * the removal from the AIL. + * This is called by the efd item code below to release references to the given + * efi item. Each efd calls this with the number of extents that it has + * logged, and when the sum of these reaches the total number of extents logged + * by this efi item we can free the efi item. */ void xfs_efi_release(xfs_efi_log_item_t *efip, uint nextents) { - struct xfs_ail *ailp = efip->efi_item.li_ailp; - int extents_left; - - ASSERT(efip->efi_next_extent > 0); - ASSERT(efip->efi_flags & XFS_EFI_COMMITTED); - - spin_lock(&ailp->xa_lock); - ASSERT(efip->efi_next_extent >= nextents); - efip->efi_next_extent -= nextents; - extents_left = efip->efi_next_extent; - if (extents_left == 0) { - /* xfs_trans_ail_delete() drops the AIL lock. */ - xfs_trans_ail_delete(ailp, (xfs_log_item_t *)efip); - xfs_efi_item_free(efip); - } else { - spin_unlock(&ailp->xa_lock); - } + ASSERT(atomic_read(&efip->efi_next_extent) >= nextents); + if (atomic_sub_and_test(nextents, &efip->efi_next_extent)) + __xfs_efi_release(efip); } static inline struct xfs_efd_log_item *EFD_ITEM(struct xfs_log_item *lip) diff --git a/fs/xfs/xfs_extfree_item.h b/fs/xfs/xfs_extfree_item.h index f7834ec..375f68e 100644 --- a/fs/xfs/xfs_extfree_item.h +++ b/fs/xfs/xfs_extfree_item.h @@ -111,10 +111,10 @@ typedef struct xfs_efd_log_format_64 { #define XFS_EFI_MAX_FAST_EXTENTS 16 /* - * Define EFI flags. + * Define EFI flag bits. Manipulated by set/clear/test_bit operators. */ -#define XFS_EFI_RECOVERED 0x1 -#define XFS_EFI_COMMITTED 0x2 +#define XFS_EFI_RECOVERED 1 +#define XFS_EFI_COMMITTED 2 /* * This is the "extent free intention" log item. It is used @@ -124,8 +124,8 @@ typedef struct xfs_efd_log_format_64 { */ typedef struct xfs_efi_log_item { xfs_log_item_t efi_item; - uint efi_flags; /* misc flags */ - uint efi_next_extent; + atomic_t efi_next_extent; + unsigned long efi_flags; /* misc flags */ xfs_efi_log_format_t efi_format; } xfs_efi_log_item_t; diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 4ab4f6f..d7219e2 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -2567,8 +2567,7 @@ xlog_recover_efi_pass2( xfs_efi_item_free(efip); return error; } - efip->efi_next_extent = efi_formatp->efi_nextents; - efip->efi_flags |= XFS_EFI_COMMITTED; + atomic_set(&efip->efi_next_extent, efi_formatp->efi_nextents); spin_lock(&log->l_ailp->xa_lock); /* @@ -2878,7 +2877,7 @@ xlog_recover_process_efi( xfs_extent_t *extp; xfs_fsblock_t startblock_fsb; - ASSERT(!(efip->efi_flags & XFS_EFI_RECOVERED)); + ASSERT(!test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)); /* * First check the validity of the extents described by the @@ -2917,7 +2916,7 @@ xlog_recover_process_efi( extp->ext_len); } - efip->efi_flags |= XFS_EFI_RECOVERED; + set_bit(XFS_EFI_RECOVERED, &efip->efi_flags); error = xfs_trans_commit(tp, 0); return error; @@ -2974,7 +2973,7 @@ xlog_recover_process_efis( * Skip EFIs that we've already processed. */ efip = (xfs_efi_log_item_t *)lip; - if (efip->efi_flags & XFS_EFI_RECOVERED) { + if (test_bit(XFS_EFI_RECOVERED, &efip->efi_flags)) { lip = xfs_trans_ail_cursor_next(ailp, &cur); continue; } diff --git a/fs/xfs/xfs_trans_extfree.c b/fs/xfs/xfs_trans_extfree.c index f783d5e..f7590f5 100644 --- a/fs/xfs/xfs_trans_extfree.c +++ b/fs/xfs/xfs_trans_extfree.c @@ -69,12 +69,16 @@ xfs_trans_log_efi_extent(xfs_trans_t *tp, tp->t_flags |= XFS_TRANS_DIRTY; efip->efi_item.li_desc->lid_flags |= XFS_LID_DIRTY; - next_extent = efip->efi_next_extent; + /* + * atomic_inc_return gives us the value after the increment; + * we want to use it as an array index so we need to subtract 1 from + * it. + */ + next_extent = atomic_inc_return(&efip->efi_next_extent) - 1; ASSERT(next_extent < efip->efi_format.efi_nextents); extp = &(efip->efi_format.efi_extents[next_extent]); extp->ext_start = start_block; extp->ext_len = ext_len; - efip->efi_next_extent++; } -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:19 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.9 required=5.0 tests=BAYES_00,LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SIEw244757 for ; Tue, 21 Dec 2010 01:28:18 -0600 X-ASG-Debug-ID: 1292916613-31e801890000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A81BE147031F for ; Mon, 20 Dec 2010 23:30:14 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id WOarUWKLzfJzmz9Q for ; Mon, 20 Dec 2010 23:30:14 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 51088109-1927428 for ; Tue, 21 Dec 2010 18:00:12 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfd-0001DK-2z for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:05 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfR-0006ZR-O3 for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:53 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 17/34] xfs: bulk AIL insertion during transaction commit Subject: [PATCH 17/34] xfs: bulk AIL insertion during transaction commit Date: Tue, 21 Dec 2010 18:29:13 +1100 Message-Id: <1292916570-25015-18-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292916615 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50052 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner When inserting items into the AIL from the transaction committed callbacks, we take the AIL lock for every single item that is to be inserted. For a CIL checkpoint commit, this can be tens of thousands of individual inserts, yet almost all of the items will be inserted at the same point in the AIL because they have the same index. To reduce the overhead and contention on the AIL lock for such operations, introduce a "bulk insert" operation which allows a list of log items with the same LSN to be inserted in a single operation via a list splice. To do this, we need to pre-sort the log items being committed into a temporary list for insertion. The complexity is that not every log item will end up with the same LSN, and not every item is actually inserted into the AIL. Items that don't match the commit LSN will be inserted and unpinned as per the current one-at-a-time method (relatively rare), while items that are not to be inserted will be unpinned and freed immediately. Items that are to be inserted at the given commit lsn are placed in a temporary array and inserted into the AIL in bulk each time the array fills up. As a result of this, we trade off AIL hold time for a significant reduction in traffic. lock_stat output shows that the worst case hold time is unchanged, but contention from AIL inserts drops by an order of magnitude and the number of lock traversal decreases significantly. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_log_cil.c | 9 +--- fs/xfs/xfs_trans.c | 79 +++++++++++++++++++++++++++++++++- fs/xfs/xfs_trans_ail.c | 109 ++++++++++++++++++++++++++++++++++++++++++++++- fs/xfs/xfs_trans_priv.h | 10 +++- 4 files changed, 195 insertions(+), 12 deletions(-) diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c index 23d6ceb..f36f1a2 100644 --- a/fs/xfs/xfs_log_cil.c +++ b/fs/xfs/xfs_log_cil.c @@ -361,15 +361,10 @@ xlog_cil_committed( int abort) { struct xfs_cil_ctx *ctx = args; - struct xfs_log_vec *lv; - int abortflag = abort ? XFS_LI_ABORTED : 0; struct xfs_busy_extent *busyp, *n; - /* unpin all the log items */ - for (lv = ctx->lv_chain; lv; lv = lv->lv_next ) { - xfs_trans_item_committed(lv->lv_item, ctx->start_lsn, - abortflag); - } + xfs_trans_committed_bulk(ctx->cil->xc_log->l_ailp, ctx->lv_chain, + ctx->start_lsn, abort); list_for_each_entry_safe(busyp, n, &ctx->busy_extents, list) xfs_alloc_busy_clear(ctx->cil->xc_log->l_mp, busyp); diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index 8139a2e..7bb1439 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -1347,7 +1347,7 @@ xfs_trans_fill_vecs( * they could be immediately flushed and we'd have to race with the flusher * trying to pull the item from the AIL as we add it. */ -void +static void xfs_trans_item_committed( struct xfs_log_item *lip, xfs_lsn_t commit_lsn, @@ -1422,6 +1422,83 @@ xfs_trans_committed( xfs_trans_free(tp); } +static inline void +xfs_log_item_batch_insert( + struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items, + xfs_lsn_t commit_lsn) +{ + int i; + + spin_lock(&ailp->xa_lock); + /* xfs_trans_ail_update_bulk drops ailp->xa_lock */ + xfs_trans_ail_update_bulk(ailp, log_items, nr_items, commit_lsn); + + for (i = 0; i < nr_items; i++) + IOP_UNPIN(log_items[i], 0); +} + +/* + * Bulk operation version of xfs_trans_committed that takes a log vector of + * items to insert into the AIL. This uses bulk AIL insertion techniques to + * minimise lock traffic. + */ +void +xfs_trans_committed_bulk( + struct xfs_ail *ailp, + struct xfs_log_vec *log_vector, + xfs_lsn_t commit_lsn, + int aborted) +{ +#define LOG_ITEM_BATCH_SIZE 32 + struct xfs_log_item *log_items[LOG_ITEM_BATCH_SIZE]; + struct xfs_log_vec *lv; + int i = 0; + + /* unpin all the log items */ + for (lv = log_vector; lv; lv = lv->lv_next ) { + struct xfs_log_item *lip = lv->lv_item; + xfs_lsn_t item_lsn; + + if (aborted) + lip->li_flags |= XFS_LI_ABORTED; + item_lsn = IOP_COMMITTED(lip, commit_lsn); + + /* item_lsn of -1 means the item was freed */ + if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0) + continue; + + if (item_lsn != commit_lsn) { + + /* + * Not a bulk update option due to unusual item_lsn. + * Push into AIL immediately, rechecking the lsn once + * we have the ail lock. Then unpin the item. + */ + spin_lock(&ailp->xa_lock); + if (XFS_LSN_CMP(item_lsn, lip->li_lsn) > 0) + xfs_trans_ail_update(ailp, lip, item_lsn); + else + spin_unlock(&ailp->xa_lock); + IOP_UNPIN(lip, 0); + continue; + } + + /* Item is a candidate for bulk AIL insert. */ + log_items[i++] = lv->lv_item; + if (i >= LOG_ITEM_BATCH_SIZE) { + xfs_log_item_batch_insert(ailp, log_items, + LOG_ITEM_BATCH_SIZE, commit_lsn); + i = 0; + } + } + + /* make sure we insert the remainder! */ + if (i) + xfs_log_item_batch_insert(ailp, log_items, i, commit_lsn); +} + /* * Called from the trans_commit code when we notice that * the filesystem is in the middle of a forced shutdown. diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index 645928c..fe991a7 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -29,6 +29,7 @@ #include "xfs_error.h" STATIC void xfs_ail_insert(struct xfs_ail *, xfs_log_item_t *); +STATIC void xfs_ail_splice(struct xfs_ail *, struct list_head *, xfs_lsn_t); STATIC void xfs_ail_delete(struct xfs_ail *, xfs_log_item_t *); STATIC xfs_log_item_t * xfs_ail_min(struct xfs_ail *); STATIC xfs_log_item_t * xfs_ail_next(struct xfs_ail *, xfs_log_item_t *); @@ -502,6 +503,79 @@ xfs_trans_ail_update( } /* xfs_trans_update_ail */ /* + * xfs_trans_ail_update - bulk AIL insertion operation. + * + * @xfs_trans_ail_update takes an array of log items that all need to be + * positioned at the same LSN in the AIL. If an item is not in the AIL, it will + * be added. Otherwise, it will be repositioned by removing it and re-adding + * it to the AIL. If we move the first item in the AIL, update the log tail to + * match the new minimum LSN in the AIL. + * + * This function takes the AIL lock once to execute the update operations on + * all the items in the array, and as such should not be called with the AIL + * lock held. As a result, once we have the AIL lock, we need to check each log + * item LSN to confirm it needs to be moved forward in the AIL. + * + * To optimise the insert operation, we delete all the items from the AIL in + * the first pass, moving them into a temporary list, then splice the temporary + * list into the correct position in the AIL. This avoids needing to do an + * insert operation on every item. + * + * This function must be called with the AIL lock held. The lock is dropped + * before returning. + */ +void +xfs_trans_ail_update_bulk( + struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items, + xfs_lsn_t lsn) __releases(ailp->xa_lock) +{ + xfs_log_item_t *mlip; + xfs_lsn_t tail_lsn; + int mlip_changed = 0; + int i; + LIST_HEAD(tmp); + + mlip = xfs_ail_min(ailp); + + for (i = 0; i < nr_items; i++) { + struct xfs_log_item *lip = log_items[i]; + if (lip->li_flags & XFS_LI_IN_AIL) { + /* check if we really need to move the item */ + if (XFS_LSN_CMP(lsn, lip->li_lsn) <= 0) + continue; + + xfs_ail_delete(ailp, lip); + if (mlip == lip) + mlip_changed = 1; + } else { + lip->li_flags |= XFS_LI_IN_AIL; + } + lip->li_lsn = lsn; + list_add(&lip->li_ail, &tmp); + } + + xfs_ail_splice(ailp, &tmp, lsn); + + if (!mlip_changed) { + spin_unlock(&ailp->xa_lock); + return; + } + + /* + * It is not safe to access mlip after the AIL lock is dropped, so we + * must get a copy of li_lsn before we do so. This is especially + * important on 32-bit platforms where accessing and updating 64-bit + * values like li_lsn is not atomic. + */ + mlip = xfs_ail_min(ailp); + tail_lsn = mlip->li_lsn; + spin_unlock(&ailp->xa_lock); + xfs_log_move_tail(ailp->xa_mount, tail_lsn); +} + +/* * Delete the given item from the AIL. It must already be in * the AIL. * @@ -642,8 +716,8 @@ xfs_ail_insert( break; } - ASSERT((&next_lip->li_ail == &ailp->xa_ail) || - (XFS_LSN_CMP(next_lip->li_lsn, lip->li_lsn) <= 0)); + ASSERT(&next_lip->li_ail == &ailp->xa_ail || + XFS_LSN_CMP(next_lip->li_lsn, lip->li_lsn) <= 0); list_add(&lip->li_ail, &next_lip->li_ail); @@ -652,6 +726,37 @@ xfs_ail_insert( } /* + * splice the log item list into the AIL at the given LSN. + */ +STATIC void +xfs_ail_splice( + struct xfs_ail *ailp, + struct list_head *list, + xfs_lsn_t lsn) +{ + xfs_log_item_t *next_lip; + + /* + * If the list is empty, just insert the item. + */ + if (list_empty(&ailp->xa_ail)) { + list_splice(list, &ailp->xa_ail); + return; + } + + list_for_each_entry_reverse(next_lip, &ailp->xa_ail, li_ail) { + if (XFS_LSN_CMP(next_lip->li_lsn, lsn) <= 0) + break; + } + + ASSERT((&next_lip->li_ail == &ailp->xa_ail) || + (XFS_LSN_CMP(next_lip->li_lsn, lsn) <= 0)); + + list_splice_init(list, &next_lip->li_ail); + return; +} + +/* * Delete the given item from the AIL. Return a pointer to the item. */ STATIC void diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h index 62da86c..e039729 100644 --- a/fs/xfs/xfs_trans_priv.h +++ b/fs/xfs/xfs_trans_priv.h @@ -22,15 +22,17 @@ struct xfs_log_item; struct xfs_log_item_desc; struct xfs_mount; struct xfs_trans; +struct xfs_ail; +struct xfs_log_vec; void xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *); void xfs_trans_del_item(struct xfs_log_item *); void xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn, int flags); -void xfs_trans_item_committed(struct xfs_log_item *lip, - xfs_lsn_t commit_lsn, int aborted); void xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp); +void xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv, + xfs_lsn_t commit_lsn, int aborted); /* * AIL traversal cursor. * @@ -76,6 +78,10 @@ struct xfs_ail { void xfs_trans_ail_update(struct xfs_ail *ailp, struct xfs_log_item *lip, xfs_lsn_t lsn) __releases(ailp->xa_lock); +void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items, xfs_lsn_t lsn) + __releases(ailp->xa_lock); void xfs_trans_ail_delete(struct xfs_ail *ailp, struct xfs_log_item *lip) __releases(ailp->xa_lock); -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:21 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SK6i244774 for ; Tue, 21 Dec 2010 01:28:20 -0600 X-ASG-Debug-ID: 1292916616-39a701670000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CD5BE1470321 for ; Mon, 20 Dec 2010 23:30:16 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id u6mgSYrZOXX8y2jv for ; Mon, 20 Dec 2010 23:30:16 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 51088111-1927428 for ; Tue, 21 Dec 2010 18:00:15 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfc-0001D7-Qi for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:04 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfH-0006ZI-GR for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:43 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 13/34] xfs: connect up buffer reclaim priority hooks Subject: [PATCH 13/34] xfs: connect up buffer reclaim priority hooks Date: Tue, 21 Dec 2010 18:29:09 +1100 Message-Id: <1292916570-25015-14-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292916617 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50052 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Now that the buffer reclaim infrastructure can handle different reclaim priorities for different types of buffers, reconnect the hooks in the XFS code that has been sitting dormant since it was ported to Linux. This should finally give use reclaim prioritisation that is on a par with the functionality that Irix provided XFS 15 years ago. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_buf.h | 10 ++++++++-- fs/xfs/xfs_btree.c | 9 ++++----- fs/xfs/xfs_inode.c | 2 +- fs/xfs/xfs_trans.h | 2 +- 4 files changed, 14 insertions(+), 9 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_buf.h b/fs/xfs/linux-2.6/xfs_buf.h index 4601eab..a76c242 100644 --- a/fs/xfs/linux-2.6/xfs_buf.h +++ b/fs/xfs/linux-2.6/xfs_buf.h @@ -336,9 +336,15 @@ void xfs_buf_stale(struct xfs_buf *bp); #define XFS_BUF_SIZE(bp) ((bp)->b_buffer_length) #define XFS_BUF_SET_SIZE(bp, cnt) ((bp)->b_buffer_length = (cnt)) -#define XFS_BUF_SET_VTYPE_REF(bp, type, ref) do { } while (0) +static inline void +xfs_buf_set_ref( + struct xfs_buf *bp, + int lru_ref) +{ + atomic_set(&bp->b_lru_ref, lru_ref); +} +#define XFS_BUF_SET_VTYPE_REF(bp, type, ref) xfs_buf_set_ref(bp, ref) #define XFS_BUF_SET_VTYPE(bp, type) do { } while (0) -#define XFS_BUF_SET_REF(bp, ref) do { } while (0) #define XFS_BUF_ISPINNED(bp) atomic_read(&((bp)->b_pin_count)) diff --git a/fs/xfs/xfs_btree.c b/fs/xfs/xfs_btree.c index 04f9cca..2f9e97c 100644 --- a/fs/xfs/xfs_btree.c +++ b/fs/xfs/xfs_btree.c @@ -634,9 +634,8 @@ xfs_btree_read_bufl( return error; } ASSERT(!bp || !XFS_BUF_GETERROR(bp)); - if (bp != NULL) { + if (bp) XFS_BUF_SET_VTYPE_REF(bp, B_FS_MAP, refval); - } *bpp = bp; return 0; } @@ -944,13 +943,13 @@ xfs_btree_set_refs( switch (cur->bc_btnum) { case XFS_BTNUM_BNO: case XFS_BTNUM_CNT: - XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_MAP, XFS_ALLOC_BTREE_REF); + XFS_BUF_SET_VTYPE_REF(bp, B_FS_MAP, XFS_ALLOC_BTREE_REF); break; case XFS_BTNUM_INO: - XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_INOMAP, XFS_INO_BTREE_REF); + XFS_BUF_SET_VTYPE_REF(bp, B_FS_INOMAP, XFS_INO_BTREE_REF); break; case XFS_BTNUM_BMAP: - XFS_BUF_SET_VTYPE_REF(*bpp, B_FS_MAP, XFS_BMAP_BTREE_REF); + XFS_BUF_SET_VTYPE_REF(bp, B_FS_MAP, XFS_BMAP_BTREE_REF); break; default: ASSERT(0); diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c index 43ffd90..be7cf62 100644 --- a/fs/xfs/xfs_inode.c +++ b/fs/xfs/xfs_inode.c @@ -887,7 +887,7 @@ xfs_iread( * around for a while. This helps to keep recently accessed * meta-data in-core longer. */ - XFS_BUF_SET_REF(bp, XFS_INO_REF); + xfs_buf_set_ref(bp, XFS_INO_REF); /* * Use xfs_trans_brelse() to release the buffer containing the diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h index 246286b..c2042b7 100644 --- a/fs/xfs/xfs_trans.h +++ b/fs/xfs/xfs_trans.h @@ -294,8 +294,8 @@ struct xfs_log_item_desc { #define XFS_ALLOC_BTREE_REF 2 #define XFS_BMAP_BTREE_REF 2 #define XFS_DIR_BTREE_REF 2 +#define XFS_INO_REF 2 #define XFS_ATTR_BTREE_REF 1 -#define XFS_INO_REF 1 #define XFS_DQUOT_REF 1 #ifdef __KERNEL__ -- 1.7.2.3 From SRS0+K7iM+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:22 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SLEm244790 for ; Tue, 21 Dec 2010 01:28:22 -0600 X-ASG-Debug-ID: 1292916617-337f01e50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 231E91CE33D1 for ; Mon, 20 Dec 2010 23:30:17 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id yaHmMUND84XgBqBj for ; Mon, 20 Dec 2010 23:30:17 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 5388616-1927428 for ; Tue, 21 Dec 2010 18:00:16 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfd-0001DS-9v for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:05 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfR-0006Zg-Ux for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:53 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 21/34] xfs: use AIL bulk update function to implement single updates Subject: [PATCH 21/34] xfs: use AIL bulk update function to implement single updates Date: Tue, 21 Dec 2010 18:29:17 +1100 Message-Id: <1292916570-25015-22-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292916619 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner We now have two copies of AIL insert operations that are mostly duplicate functionality. The single log item updates can be implemented via the bulk updates by turning xfs_trans_ail_update() into a simple wrapper. This removes all the duplicate insert functionality and associated helpers. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_log_recover.c | 2 +- fs/xfs/xfs_trans_ail.c | 88 ---------------------------------------------- fs/xfs/xfs_trans_priv.h | 19 ++++++---- 3 files changed, 13 insertions(+), 96 deletions(-) diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index d7219e2..4abe7a9 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -2573,7 +2573,7 @@ xlog_recover_efi_pass2( /* * xfs_trans_ail_update() drops the AIL lock. */ - xfs_trans_ail_update(log->l_ailp, (xfs_log_item_t *)efip, lsn); + xfs_trans_ail_update(log->l_ailp, &efip->efi_item, lsn); return 0; } diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index 218f968..8481a5a 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -28,7 +28,6 @@ #include "xfs_trans_priv.h" #include "xfs_error.h" -STATIC void xfs_ail_insert(struct xfs_ail *, xfs_log_item_t *); STATIC void xfs_ail_splice(struct xfs_ail *, struct list_head *, xfs_lsn_t); STATIC void xfs_ail_delete(struct xfs_ail *, xfs_log_item_t *); STATIC xfs_log_item_t * xfs_ail_min(struct xfs_ail *); @@ -450,58 +449,6 @@ xfs_trans_unlocked_item( xfs_log_move_tail(ailp->xa_mount, 1); } /* xfs_trans_unlocked_item */ - -/* - * Update the position of the item in the AIL with the new - * lsn. If it is not yet in the AIL, add it. Otherwise, move - * it to its new position by removing it and re-adding it. - * - * Wakeup anyone with an lsn less than the item's lsn. If the item - * we move in the AIL is the minimum one, update the tail lsn in the - * log manager. - * - * This function must be called with the AIL lock held. The lock - * is dropped before returning. - */ -void -xfs_trans_ail_update( - struct xfs_ail *ailp, - xfs_log_item_t *lip, - xfs_lsn_t lsn) __releases(ailp->xa_lock) -{ - xfs_log_item_t *mlip; /* ptr to minimum lip */ - xfs_lsn_t tail_lsn; - - mlip = xfs_ail_min(ailp); - - if (lip->li_flags & XFS_LI_IN_AIL) { - xfs_ail_delete(ailp, lip); - } else { - lip->li_flags |= XFS_LI_IN_AIL; - } - - lip->li_lsn = lsn; - xfs_ail_insert(ailp, lip); - - if (mlip == lip) { - mlip = xfs_ail_min(ailp); - /* - * It is not safe to access mlip after the AIL lock is - * dropped, so we must get a copy of li_lsn before we do - * so. This is especially important on 32-bit platforms - * where accessing and updating 64-bit values like li_lsn - * is not atomic. - */ - tail_lsn = mlip->li_lsn; - spin_unlock(&ailp->xa_lock); - xfs_log_move_tail(ailp->xa_mount, tail_lsn); - } else { - spin_unlock(&ailp->xa_lock); - } - - -} /* xfs_trans_update_ail */ - /* * xfs_trans_ail_update - bulk AIL insertion operation. * @@ -764,41 +711,6 @@ xfs_trans_ail_destroy( } /* - * Insert the given log item into the AIL. - * We almost always insert at the end of the list, so on inserts - * we search from the end of the list to find where the - * new item belongs. - */ -STATIC void -xfs_ail_insert( - struct xfs_ail *ailp, - xfs_log_item_t *lip) -{ - xfs_log_item_t *next_lip; - - /* - * If the list is empty, just insert the item. - */ - if (list_empty(&ailp->xa_ail)) { - list_add(&lip->li_ail, &ailp->xa_ail); - return; - } - - list_for_each_entry_reverse(next_lip, &ailp->xa_ail, li_ail) { - if (XFS_LSN_CMP(next_lip->li_lsn, lip->li_lsn) <= 0) - break; - } - - ASSERT(&next_lip->li_ail == &ailp->xa_ail || - XFS_LSN_CMP(next_lip->li_lsn, lip->li_lsn) <= 0); - - list_add(&lip->li_ail, &next_lip->li_ail); - - xfs_ail_check(ailp, lip); - return; -} - -/* * splice the log item list into the AIL at the given LSN. */ STATIC void diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h index 246ca4d..f469205 100644 --- a/fs/xfs/xfs_trans_priv.h +++ b/fs/xfs/xfs_trans_priv.h @@ -75,13 +75,18 @@ struct xfs_ail { /* * From xfs_trans_ail.c */ -void xfs_trans_ail_update(struct xfs_ail *ailp, - struct xfs_log_item *lip, xfs_lsn_t lsn) - __releases(ailp->xa_lock); -void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, - struct xfs_log_item **log_items, - int nr_items, xfs_lsn_t lsn) - __releases(ailp->xa_lock); +void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, + struct xfs_log_item **log_items, int nr_items, + xfs_lsn_t lsn) __releases(ailp->xa_lock); +static inline void +xfs_trans_ail_update( + struct xfs_ail *ailp, + struct xfs_log_item *lip, + xfs_lsn_t lsn) __releases(ailp->xa_lock) +{ + xfs_trans_ail_update_bulk(ailp, &lip, 1, lsn); +} + void xfs_trans_ail_delete(struct xfs_ail *ailp, struct xfs_log_item *lip) __releases(ailp->xa_lock); -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:21 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SL6R244786 for ; Tue, 21 Dec 2010 01:28:21 -0600 X-ASG-Debug-ID: 1292916617-25d203910000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id AE63621202B for ; Mon, 20 Dec 2010 23:30:17 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id hymCAFgU18PH7Hhu for ; Mon, 20 Dec 2010 23:30:17 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 39223389-1927428 for ; Tue, 21 Dec 2010 18:00:16 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfd-0001DW-D6 for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:05 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfS-0006Zi-0l for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:54 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 22/34] xfs: use AIL bulk delete function to implement single delete Subject: [PATCH 22/34] xfs: use AIL bulk delete function to implement single delete Date: Tue, 21 Dec 2010 18:29:18 +1100 Message-Id: <1292916570-25015-23-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292916618 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner We now have two copies of AIL delete operations that are mostly duplicate functionality. The single log item deletes can be implemented via the bulk updates by turning xfs_trans_ail_delete() into a simple wrapper. This removes all the duplicate delete functionality and associated helpers. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_trans_ail.c | 65 ----------------------------------------------- fs/xfs/xfs_trans_priv.h | 18 ++++++++----- 2 files changed, 11 insertions(+), 72 deletions(-) diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index 8481a5a..c5bbbc4 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -523,70 +523,6 @@ xfs_trans_ail_update_bulk( } /* - * Delete the given item from the AIL. It must already be in - * the AIL. - * - * Wakeup anyone with an lsn less than item's lsn. If the item - * we delete in the AIL is the minimum one, update the tail lsn in the - * log manager. - * - * Clear the IN_AIL flag from the item, reset its lsn to 0, and - * bump the AIL's generation count to indicate that the tree - * has changed. - * - * This function must be called with the AIL lock held. The lock - * is dropped before returning. - */ -void -xfs_trans_ail_delete( - struct xfs_ail *ailp, - xfs_log_item_t *lip) __releases(ailp->xa_lock) -{ - xfs_log_item_t *mlip; - xfs_lsn_t tail_lsn; - - if (lip->li_flags & XFS_LI_IN_AIL) { - mlip = xfs_ail_min(ailp); - xfs_ail_delete(ailp, lip); - - - lip->li_flags &= ~XFS_LI_IN_AIL; - lip->li_lsn = 0; - - if (mlip == lip) { - mlip = xfs_ail_min(ailp); - /* - * It is not safe to access mlip after the AIL lock - * is dropped, so we must get a copy of li_lsn - * before we do so. This is especially important - * on 32-bit platforms where accessing and updating - * 64-bit values like li_lsn is not atomic. - */ - tail_lsn = mlip ? mlip->li_lsn : 0; - spin_unlock(&ailp->xa_lock); - xfs_log_move_tail(ailp->xa_mount, tail_lsn); - } else { - spin_unlock(&ailp->xa_lock); - } - } - else { - /* - * If the file system is not being shutdown, we are in - * serious trouble if we get to this stage. - */ - struct xfs_mount *mp = ailp->xa_mount; - - spin_unlock(&ailp->xa_lock); - if (!XFS_FORCED_SHUTDOWN(mp)) { - xfs_cmn_err(XFS_PTAG_AILDELETE, CE_ALERT, mp, - "%s: attempting to delete a log item that is not in the AIL", - __func__); - xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); - } - } -} - -/* * xfs_trans_ail_delete_bulk - remove multiple log items from the AIL * * @xfs_trans_ail_delete_bulk takes an array of log items that all need to @@ -660,7 +596,6 @@ xfs_trans_ail_delete_bulk( xfs_log_move_tail(ailp->xa_mount, tail_lsn); } - /* * The active item list (AIL) is a doubly linked list of log * items sorted by ascending lsn. The base of the list is diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h index f469205..35162c2 100644 --- a/fs/xfs/xfs_trans_priv.h +++ b/fs/xfs/xfs_trans_priv.h @@ -87,13 +87,17 @@ xfs_trans_ail_update( xfs_trans_ail_update_bulk(ailp, &lip, 1, lsn); } -void xfs_trans_ail_delete(struct xfs_ail *ailp, - struct xfs_log_item *lip) - __releases(ailp->xa_lock); -void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp, - struct xfs_log_item **log_items, - int nr_items) - __releases(ailp->xa_lock); +void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp, + struct xfs_log_item **log_items, int nr_items) + __releases(ailp->xa_lock); +static inline void +xfs_trans_ail_delete( + struct xfs_ail *ailp, + xfs_log_item_t *lip) __releases(ailp->xa_lock) +{ + xfs_trans_ail_delete_bulk(ailp, &lip, 1); +} + void xfs_trans_ail_push(struct xfs_ail *, xfs_lsn_t); void xfs_trans_unlocked_item(struct xfs_ail *, xfs_log_item_t *); -- 1.7.2.3 From SRS0++ukE+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,SUBJ_TICKET autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SMhC244804 for ; Tue, 21 Dec 2010 01:28:22 -0600 X-ASG-Debug-ID: 1292916617-218c03da0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8337221202B for ; Mon, 20 Dec 2010 23:30:18 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id yZq6tYkBMFaR2Zuk for ; Mon, 20 Dec 2010 23:30:18 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50071198-1927428 for ; Tue, 21 Dec 2010 18:00:17 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfn-0001Ds-G6 for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:15 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfS-0006Zm-3V for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:54 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 23/34] xfs: convert log grant ticket queues to list heads Subject: [PATCH 23/34] xfs: convert log grant ticket queues to list heads Date: Tue, 21 Dec 2010 18:29:19 +1100 Message-Id: <1292916570-25015-24-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292916619 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The grant write and reserve queues use a roll-your-own double linked list, so convert it to a standard list_head structure and convert all the list traversals to use list_for_each_entry(). We can also get rid of the XLOG_TIC_IN_Q flag as we can use the list_empty() check to tell if the ticket is in a list or not. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_trace.h | 16 +++--- fs/xfs/xfs_log.c | 123 ++++++++++++++---------------------------- fs/xfs/xfs_log_priv.h | 11 ++--- 3 files changed, 53 insertions(+), 97 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h index 83e8760..69b9e1f 100644 --- a/fs/xfs/linux-2.6/xfs_trace.h +++ b/fs/xfs/linux-2.6/xfs_trace.h @@ -766,8 +766,8 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, __field(int, curr_res) __field(int, unit_res) __field(unsigned int, flags) - __field(void *, reserve_headq) - __field(void *, write_headq) + __field(int, reserveq) + __field(int, writeq) __field(int, grant_reserve_cycle) __field(int, grant_reserve_bytes) __field(int, grant_write_cycle) @@ -784,8 +784,8 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, __entry->curr_res = tic->t_curr_res; __entry->unit_res = tic->t_unit_res; __entry->flags = tic->t_flags; - __entry->reserve_headq = log->l_reserve_headq; - __entry->write_headq = log->l_write_headq; + __entry->reserveq = list_empty(&log->l_reserveq); + __entry->writeq = list_empty(&log->l_writeq); __entry->grant_reserve_cycle = log->l_grant_reserve_cycle; __entry->grant_reserve_bytes = log->l_grant_reserve_bytes; __entry->grant_write_cycle = log->l_grant_write_cycle; @@ -795,8 +795,8 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, __entry->tail_lsn = log->l_tail_lsn; ), TP_printk("dev %d:%d type %s t_ocnt %u t_cnt %u t_curr_res %u " - "t_unit_res %u t_flags %s reserve_headq 0x%p " - "write_headq 0x%p grant_reserve_cycle %d " + "t_unit_res %u t_flags %s reserveq %s " + "writeq %s grant_reserve_cycle %d " "grant_reserve_bytes %d grant_write_cycle %d " "grant_write_bytes %d curr_cycle %d curr_block %d " "tail_cycle %d tail_block %d", @@ -807,8 +807,8 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, __entry->curr_res, __entry->unit_res, __print_flags(__entry->flags, "|", XLOG_TIC_FLAGS), - __entry->reserve_headq, - __entry->write_headq, + __entry->reserveq ? "empty" : "active", + __entry->writeq ? "empty" : "active", __entry->grant_reserve_cycle, __entry->grant_reserve_bytes, __entry->grant_write_cycle, diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index cee4ab9..1b82735 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -95,38 +95,6 @@ STATIC void xlog_verify_tail_lsn(xlog_t *log, xlog_in_core_t *iclog, STATIC int xlog_iclogs_empty(xlog_t *log); - -static void -xlog_ins_ticketq(struct xlog_ticket **qp, struct xlog_ticket *tic) -{ - if (*qp) { - tic->t_next = (*qp); - tic->t_prev = (*qp)->t_prev; - (*qp)->t_prev->t_next = tic; - (*qp)->t_prev = tic; - } else { - tic->t_prev = tic->t_next = tic; - *qp = tic; - } - - tic->t_flags |= XLOG_TIC_IN_Q; -} - -static void -xlog_del_ticketq(struct xlog_ticket **qp, struct xlog_ticket *tic) -{ - if (tic == tic->t_next) { - *qp = NULL; - } else { - *qp = tic->t_next; - tic->t_next->t_prev = tic->t_prev; - tic->t_prev->t_next = tic->t_next; - } - - tic->t_next = tic->t_prev = NULL; - tic->t_flags &= ~XLOG_TIC_IN_Q; -} - static void xlog_grant_sub_space(struct log *log, int bytes) { @@ -724,7 +692,7 @@ xfs_log_move_tail(xfs_mount_t *mp, log->l_tail_lsn = tail_lsn; } - if ((tic = log->l_write_headq)) { + if (!list_empty(&log->l_writeq)) { #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); @@ -732,7 +700,7 @@ xfs_log_move_tail(xfs_mount_t *mp, cycle = log->l_grant_write_cycle; bytes = log->l_grant_write_bytes; free_bytes = xlog_space_left(log, cycle, bytes); - do { + list_for_each_entry(tic, &log->l_writeq, t_queue) { ASSERT(tic->t_flags & XLOG_TIC_PERM_RESERV); if (free_bytes < tic->t_unit_res && tail_lsn != 1) @@ -740,10 +708,10 @@ xfs_log_move_tail(xfs_mount_t *mp, tail_lsn = 0; free_bytes -= tic->t_unit_res; sv_signal(&tic->t_wait); - tic = tic->t_next; - } while (tic != log->l_write_headq); + } } - if ((tic = log->l_reserve_headq)) { + + if (!list_empty(&log->l_reserveq)) { #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); @@ -751,7 +719,7 @@ xfs_log_move_tail(xfs_mount_t *mp, cycle = log->l_grant_reserve_cycle; bytes = log->l_grant_reserve_bytes; free_bytes = xlog_space_left(log, cycle, bytes); - do { + list_for_each_entry(tic, &log->l_reserveq, t_queue) { if (tic->t_flags & XLOG_TIC_PERM_RESERV) need_bytes = tic->t_unit_res*tic->t_cnt; else @@ -761,8 +729,7 @@ xfs_log_move_tail(xfs_mount_t *mp, tail_lsn = 0; free_bytes -= need_bytes; sv_signal(&tic->t_wait); - tic = tic->t_next; - } while (tic != log->l_reserve_headq); + } } spin_unlock(&log->l_grant_lock); } /* xfs_log_move_tail */ @@ -1053,6 +1020,8 @@ xlog_alloc_log(xfs_mount_t *mp, log->l_curr_cycle = 1; /* 0 is bad since this is initial value */ log->l_grant_reserve_cycle = 1; log->l_grant_write_cycle = 1; + INIT_LIST_HEAD(&log->l_reserveq); + INIT_LIST_HEAD(&log->l_writeq); error = EFSCORRUPTED; if (xfs_sb_version_hassector(&mp->m_sb)) { @@ -2550,8 +2519,8 @@ xlog_grant_log_space(xlog_t *log, trace_xfs_log_grant_enter(log, tic); /* something is already sleeping; insert new transaction at end */ - if (log->l_reserve_headq) { - xlog_ins_ticketq(&log->l_reserve_headq, tic); + if (!list_empty(&log->l_reserveq)) { + list_add_tail(&tic->t_queue, &log->l_reserveq); trace_xfs_log_grant_sleep1(log, tic); @@ -2583,8 +2552,8 @@ redo: free_bytes = xlog_space_left(log, log->l_grant_reserve_cycle, log->l_grant_reserve_bytes); if (free_bytes < need_bytes) { - if ((tic->t_flags & XLOG_TIC_IN_Q) == 0) - xlog_ins_ticketq(&log->l_reserve_headq, tic); + if (list_empty(&tic->t_queue)) + list_add_tail(&tic->t_queue, &log->l_reserveq); trace_xfs_log_grant_sleep2(log, tic); @@ -2602,8 +2571,9 @@ redo: trace_xfs_log_grant_wake2(log, tic); goto redo; - } else if (tic->t_flags & XLOG_TIC_IN_Q) - xlog_del_ticketq(&log->l_reserve_headq, tic); + } + + list_del_init(&tic->t_queue); /* we've got enough space */ xlog_grant_add_space(log, need_bytes); @@ -2626,9 +2596,7 @@ redo: return 0; error_return: - if (tic->t_flags & XLOG_TIC_IN_Q) - xlog_del_ticketq(&log->l_reserve_headq, tic); - + list_del_init(&tic->t_queue); trace_xfs_log_grant_error(log, tic); /* @@ -2653,7 +2621,6 @@ xlog_regrant_write_log_space(xlog_t *log, xlog_ticket_t *tic) { int free_bytes, need_bytes; - xlog_ticket_t *ntic; #ifdef DEBUG xfs_lsn_t tail_lsn; #endif @@ -2683,22 +2650,23 @@ xlog_regrant_write_log_space(xlog_t *log, * this transaction. */ need_bytes = tic->t_unit_res; - if ((ntic = log->l_write_headq)) { + if (!list_empty(&log->l_writeq)) { + struct xlog_ticket *ntic; free_bytes = xlog_space_left(log, log->l_grant_write_cycle, log->l_grant_write_bytes); - do { + list_for_each_entry(ntic, &log->l_writeq, t_queue) { ASSERT(ntic->t_flags & XLOG_TIC_PERM_RESERV); if (free_bytes < ntic->t_unit_res) break; free_bytes -= ntic->t_unit_res; sv_signal(&ntic->t_wait); - ntic = ntic->t_next; - } while (ntic != log->l_write_headq); + } - if (ntic != log->l_write_headq) { - if ((tic->t_flags & XLOG_TIC_IN_Q) == 0) - xlog_ins_ticketq(&log->l_write_headq, tic); + if (ntic != list_first_entry(&log->l_writeq, + struct xlog_ticket, t_queue)) { + if (list_empty(&tic->t_queue)) + list_add_tail(&tic->t_queue, &log->l_writeq); trace_xfs_log_regrant_write_sleep1(log, tic); @@ -2727,8 +2695,8 @@ redo: free_bytes = xlog_space_left(log, log->l_grant_write_cycle, log->l_grant_write_bytes); if (free_bytes < need_bytes) { - if ((tic->t_flags & XLOG_TIC_IN_Q) == 0) - xlog_ins_ticketq(&log->l_write_headq, tic); + if (list_empty(&tic->t_queue)) + list_add_tail(&tic->t_queue, &log->l_writeq); spin_unlock(&log->l_grant_lock); xlog_grant_push_ail(log->l_mp, need_bytes); spin_lock(&log->l_grant_lock); @@ -2745,8 +2713,9 @@ redo: trace_xfs_log_regrant_write_wake2(log, tic); goto redo; - } else if (tic->t_flags & XLOG_TIC_IN_Q) - xlog_del_ticketq(&log->l_write_headq, tic); + } + + list_del_init(&tic->t_queue); /* we've got enough space */ xlog_grant_add_space_write(log, need_bytes); @@ -2766,9 +2735,7 @@ redo: error_return: - if (tic->t_flags & XLOG_TIC_IN_Q) - xlog_del_ticketq(&log->l_reserve_headq, tic); - + list_del_init(&tic->t_queue); trace_xfs_log_regrant_write_error(log, tic); /* @@ -3435,6 +3402,7 @@ xlog_ticket_alloc( } atomic_set(&tic->t_ref, 1); + INIT_LIST_HEAD(&tic->t_queue); tic->t_unit_res = unit_bytes; tic->t_curr_res = unit_bytes; tic->t_cnt = cnt; @@ -3742,26 +3710,17 @@ xfs_log_force_umount( spin_unlock(&log->l_icloglock); /* - * We don't want anybody waiting for log reservations - * after this. That means we have to wake up everybody - * queued up on reserve_headq as well as write_headq. - * In addition, we make sure in xlog_{re}grant_log_space - * that we don't enqueue anything once the SHUTDOWN flag - * is set, and this action is protected by the GRANTLOCK. + * We don't want anybody waiting for log reservations after this. That + * means we have to wake up everybody queued up on reserveq as well as + * writeq. In addition, we make sure in xlog_{re}grant_log_space that + * we don't enqueue anything once the SHUTDOWN flag is set, and this + * action is protected by the GRANTLOCK. */ - if ((tic = log->l_reserve_headq)) { - do { - sv_signal(&tic->t_wait); - tic = tic->t_next; - } while (tic != log->l_reserve_headq); - } + list_for_each_entry(tic, &log->l_reserveq, t_queue) + sv_signal(&tic->t_wait); - if ((tic = log->l_write_headq)) { - do { - sv_signal(&tic->t_wait); - tic = tic->t_next; - } while (tic != log->l_write_headq); - } + list_for_each_entry(tic, &log->l_writeq, t_queue) + sv_signal(&tic->t_wait); spin_unlock(&log->l_grant_lock); if (!(log->l_iclog->ic_state & XLOG_STATE_IOERROR)) { diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index c1ce505..a5b3c02 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -132,12 +132,10 @@ static inline uint xlog_get_client_id(__be32 i) */ #define XLOG_TIC_INITED 0x1 /* has been initialized */ #define XLOG_TIC_PERM_RESERV 0x2 /* permanent reservation */ -#define XLOG_TIC_IN_Q 0x4 #define XLOG_TIC_FLAGS \ { XLOG_TIC_INITED, "XLOG_TIC_INITED" }, \ - { XLOG_TIC_PERM_RESERV, "XLOG_TIC_PERM_RESERV" }, \ - { XLOG_TIC_IN_Q, "XLOG_TIC_IN_Q" } + { XLOG_TIC_PERM_RESERV, "XLOG_TIC_PERM_RESERV" } #endif /* __KERNEL__ */ @@ -244,8 +242,7 @@ typedef struct xlog_res { typedef struct xlog_ticket { sv_t t_wait; /* ticket wait queue : 20 */ - struct xlog_ticket *t_next; /* :4|8 */ - struct xlog_ticket *t_prev; /* :4|8 */ + struct list_head t_queue; /* reserve/write queue */ xlog_tid_t t_tid; /* transaction identifier : 4 */ atomic_t t_ref; /* ticket reference count : 4 */ int t_curr_res; /* current reservation in bytes : 4 */ @@ -519,8 +516,8 @@ typedef struct log { /* The following block of fields are changed while holding grant_lock */ spinlock_t l_grant_lock ____cacheline_aligned_in_smp; - xlog_ticket_t *l_reserve_headq; - xlog_ticket_t *l_write_headq; + struct list_head l_reserveq; + struct list_head l_writeq; int l_grant_reserve_cycle; int l_grant_reserve_bytes; int l_grant_write_cycle; -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:24 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_57 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SNQt244816 for ; Tue, 21 Dec 2010 01:28:23 -0600 X-ASG-Debug-ID: 1292916618-2260031e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0F1481CE33D1 for ; Mon, 20 Dec 2010 23:30:18 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id nPEA6ynSHtdUWHXm for ; Mon, 20 Dec 2010 23:30:18 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50575233-1927428 for ; Tue, 21 Dec 2010 18:00:17 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfn-0001E2-OE for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:15 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfc-0006Zy-CR for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:04 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 27/34] xfs: use wait queues directly for the log wait queues Subject: [PATCH 27/34] xfs: use wait queues directly for the log wait queues Date: Tue, 21 Dec 2010 18:29:23 +1100 Message-Id: <1292916570-25015-28-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292916620 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The log grant queues are one of the few places left using sv_t constructs for waiting. Given we are touching this code, we should convert them to plain wait queues. While there, convert all the other sv_t users in the log code as well. Seeing as this removes the last users of the sv_t type, remove the header file defining the wrapper and the fragments that still reference it. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/sv.h | 59 -------------------------------------- fs/xfs/linux-2.6/xfs_linux.h | 1 - fs/xfs/quota/xfs_dquot.c | 1 - fs/xfs/xfs_log.c | 64 ++++++++++++++++++----------------------- fs/xfs/xfs_log_cil.c | 8 ++-- fs/xfs/xfs_log_priv.h | 25 +++++++++++++--- 6 files changed, 52 insertions(+), 106 deletions(-) delete mode 100644 fs/xfs/linux-2.6/sv.h diff --git a/fs/xfs/linux-2.6/sv.h b/fs/xfs/linux-2.6/sv.h deleted file mode 100644 index 4dfc7c3..0000000 --- a/fs/xfs/linux-2.6/sv.h +++ /dev/null @@ -1,59 +0,0 @@ -/* - * Copyright (c) 2000-2002,2005 Silicon Graphics, Inc. - * All Rights Reserved. - * - * This program is free software; you can redistribute it and/or - * modify it under the terms of the GNU General Public License as - * published by the Free Software Foundation. - * - * This program is distributed in the hope that it would be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#ifndef __XFS_SUPPORT_SV_H__ -#define __XFS_SUPPORT_SV_H__ - -#include -#include -#include - -/* - * Synchronisation variables. - * - * (Parameters "pri", "svf" and "rts" are not implemented) - */ - -typedef struct sv_s { - wait_queue_head_t waiters; -} sv_t; - -static inline void _sv_wait(sv_t *sv, spinlock_t *lock) -{ - DECLARE_WAITQUEUE(wait, current); - - add_wait_queue_exclusive(&sv->waiters, &wait); - __set_current_state(TASK_UNINTERRUPTIBLE); - spin_unlock(lock); - - schedule(); - - remove_wait_queue(&sv->waiters, &wait); -} - -#define sv_init(sv,flag,name) \ - init_waitqueue_head(&(sv)->waiters) -#define sv_destroy(sv) \ - /*NOTHING*/ -#define sv_wait(sv, pri, lock, s) \ - _sv_wait(sv, lock) -#define sv_signal(sv) \ - wake_up(&(sv)->waiters) -#define sv_broadcast(sv) \ - wake_up_all(&(sv)->waiters) - -#endif /* __XFS_SUPPORT_SV_H__ */ diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h index 9fa4f2a..ccebd86 100644 --- a/fs/xfs/linux-2.6/xfs_linux.h +++ b/fs/xfs/linux-2.6/xfs_linux.h @@ -37,7 +37,6 @@ #include #include -#include #include #include diff --git a/fs/xfs/quota/xfs_dquot.c b/fs/xfs/quota/xfs_dquot.c index faf8e1a..d22aa31 100644 --- a/fs/xfs/quota/xfs_dquot.c +++ b/fs/xfs/quota/xfs_dquot.c @@ -149,7 +149,6 @@ xfs_qm_dqdestroy( ASSERT(list_empty(&dqp->q_freelist)); mutex_destroy(&dqp->q_qlock); - sv_destroy(&dqp->q_pinwait); kmem_zone_free(xfs_Gqm->qm_dqzone, dqp); atomic_dec(&xfs_Gqm->qm_totaldquots); diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 6bba8b4..cc0504e 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -547,8 +547,8 @@ xfs_log_unmount_write(xfs_mount_t *mp) if (!(iclog->ic_state == XLOG_STATE_ACTIVE || iclog->ic_state == XLOG_STATE_DIRTY)) { if (!XLOG_FORCED_SHUTDOWN(log)) { - sv_wait(&iclog->ic_force_wait, PMEM, - &log->l_icloglock, s); + xlog_wait(&iclog->ic_force_wait, + &log->l_icloglock); } else { spin_unlock(&log->l_icloglock); } @@ -588,8 +588,8 @@ xfs_log_unmount_write(xfs_mount_t *mp) || iclog->ic_state == XLOG_STATE_DIRTY || iclog->ic_state == XLOG_STATE_IOERROR) ) { - sv_wait(&iclog->ic_force_wait, PMEM, - &log->l_icloglock, s); + xlog_wait(&iclog->ic_force_wait, + &log->l_icloglock); } else { spin_unlock(&log->l_icloglock); } @@ -700,7 +700,7 @@ xfs_log_move_tail(xfs_mount_t *mp, break; tail_lsn = 0; free_bytes -= tic->t_unit_res; - sv_signal(&tic->t_wait); + wake_up(&tic->t_wait); } } @@ -719,7 +719,7 @@ xfs_log_move_tail(xfs_mount_t *mp, break; tail_lsn = 0; free_bytes -= need_bytes; - sv_signal(&tic->t_wait); + wake_up(&tic->t_wait); } } spin_unlock(&log->l_grant_lock); @@ -1060,7 +1060,7 @@ xlog_alloc_log(xfs_mount_t *mp, spin_lock_init(&log->l_icloglock); spin_lock_init(&log->l_grant_lock); - sv_init(&log->l_flush_wait, 0, "flush_wait"); + init_waitqueue_head(&log->l_flush_wait); /* log record size must be multiple of BBSIZE; see xlog_rec_header_t */ ASSERT((XFS_BUF_SIZE(bp) & BBMASK) == 0); @@ -1116,8 +1116,8 @@ xlog_alloc_log(xfs_mount_t *mp, ASSERT(XFS_BUF_ISBUSY(iclog->ic_bp)); ASSERT(XFS_BUF_VALUSEMA(iclog->ic_bp) <= 0); - sv_init(&iclog->ic_force_wait, SV_DEFAULT, "iclog-force"); - sv_init(&iclog->ic_write_wait, SV_DEFAULT, "iclog-write"); + init_waitqueue_head(&iclog->ic_force_wait); + init_waitqueue_head(&iclog->ic_write_wait); iclogp = &iclog->ic_next; } @@ -1132,11 +1132,8 @@ xlog_alloc_log(xfs_mount_t *mp, out_free_iclog: for (iclog = log->l_iclog; iclog; iclog = prev_iclog) { prev_iclog = iclog->ic_next; - if (iclog->ic_bp) { - sv_destroy(&iclog->ic_force_wait); - sv_destroy(&iclog->ic_write_wait); + if (iclog->ic_bp) xfs_buf_free(iclog->ic_bp); - } kmem_free(iclog); } spinlock_destroy(&log->l_icloglock); @@ -1453,8 +1450,6 @@ xlog_dealloc_log(xlog_t *log) iclog = log->l_iclog; for (i=0; il_iclog_bufs; i++) { - sv_destroy(&iclog->ic_force_wait); - sv_destroy(&iclog->ic_write_wait); xfs_buf_free(iclog->ic_bp); next_iclog = iclog->ic_next; kmem_free(iclog); @@ -2261,7 +2256,7 @@ xlog_state_do_callback( xlog_state_clean_log(log); /* wake up threads waiting in xfs_log_force() */ - sv_broadcast(&iclog->ic_force_wait); + wake_up_all(&iclog->ic_force_wait); iclog = iclog->ic_next; } while (first_iclog != iclog); @@ -2308,7 +2303,7 @@ xlog_state_do_callback( spin_unlock(&log->l_icloglock); if (wake) - sv_broadcast(&log->l_flush_wait); + wake_up_all(&log->l_flush_wait); } @@ -2359,7 +2354,7 @@ xlog_state_done_syncing( * iclog buffer, we wake them all, one will get to do the * I/O, the others get to wait for the result. */ - sv_broadcast(&iclog->ic_write_wait); + wake_up_all(&iclog->ic_write_wait); spin_unlock(&log->l_icloglock); xlog_state_do_callback(log, aborted, iclog); /* also cleans log */ } /* xlog_state_done_syncing */ @@ -2408,7 +2403,7 @@ restart: XFS_STATS_INC(xs_log_noiclogs); /* Wait for log writes to have flushed */ - sv_wait(&log->l_flush_wait, 0, &log->l_icloglock, 0); + xlog_wait(&log->l_flush_wait, &log->l_icloglock); goto restart; } @@ -2523,7 +2518,8 @@ xlog_grant_log_space(xlog_t *log, goto error_return; XFS_STATS_INC(xs_sleep_logspace); - sv_wait(&tic->t_wait, PINOD|PLTWAIT, &log->l_grant_lock, s); + xlog_wait(&tic->t_wait, &log->l_grant_lock); + /* * If we got an error, and the filesystem is shutting down, * we'll catch it down below. So just continue... @@ -2552,7 +2548,7 @@ redo: spin_lock(&log->l_grant_lock); XFS_STATS_INC(xs_sleep_logspace); - sv_wait(&tic->t_wait, PINOD|PLTWAIT, &log->l_grant_lock, s); + xlog_wait(&tic->t_wait, &log->l_grant_lock); spin_lock(&log->l_grant_lock); if (XLOG_FORCED_SHUTDOWN(log)) @@ -2635,7 +2631,7 @@ xlog_regrant_write_log_space(xlog_t *log, if (free_bytes < ntic->t_unit_res) break; free_bytes -= ntic->t_unit_res; - sv_signal(&ntic->t_wait); + wake_up(&ntic->t_wait); } if (ntic != list_first_entry(&log->l_writeq, @@ -2650,8 +2646,7 @@ xlog_regrant_write_log_space(xlog_t *log, spin_lock(&log->l_grant_lock); XFS_STATS_INC(xs_sleep_logspace); - sv_wait(&tic->t_wait, PINOD|PLTWAIT, - &log->l_grant_lock, s); + xlog_wait(&tic->t_wait, &log->l_grant_lock); /* If we're shutting down, this tic is already * off the queue */ @@ -2677,8 +2672,7 @@ redo: XFS_STATS_INC(xs_sleep_logspace); trace_xfs_log_regrant_write_sleep2(log, tic); - - sv_wait(&tic->t_wait, PINOD|PLTWAIT, &log->l_grant_lock, s); + xlog_wait(&tic->t_wait, &log->l_grant_lock); /* If we're shutting down, this tic is already off the queue */ spin_lock(&log->l_grant_lock); @@ -3029,7 +3023,7 @@ maybe_sleep: return XFS_ERROR(EIO); } XFS_STATS_INC(xs_log_force_sleep); - sv_wait(&iclog->ic_force_wait, PINOD, &log->l_icloglock, s); + xlog_wait(&iclog->ic_force_wait, &log->l_icloglock); /* * No need to grab the log lock here since we're * only deciding whether or not to return EIO @@ -3147,8 +3141,8 @@ try_again: XFS_STATS_INC(xs_log_force_sleep); - sv_wait(&iclog->ic_prev->ic_write_wait, - PSWP, &log->l_icloglock, s); + xlog_wait(&iclog->ic_prev->ic_write_wait, + &log->l_icloglock); if (log_flushed) *log_flushed = 1; already_slept = 1; @@ -3176,7 +3170,7 @@ try_again: return XFS_ERROR(EIO); } XFS_STATS_INC(xs_log_force_sleep); - sv_wait(&iclog->ic_force_wait, PSWP, &log->l_icloglock, s); + xlog_wait(&iclog->ic_force_wait, &log->l_icloglock); /* * No need to grab the log lock here since we're * only deciding whether or not to return EIO @@ -3251,10 +3245,8 @@ xfs_log_ticket_put( xlog_ticket_t *ticket) { ASSERT(atomic_read(&ticket->t_ref) > 0); - if (atomic_dec_and_test(&ticket->t_ref)) { - sv_destroy(&ticket->t_wait); + if (atomic_dec_and_test(&ticket->t_ref)) kmem_zone_free(xfs_log_ticket_zone, ticket); - } } xlog_ticket_t * @@ -3387,7 +3379,7 @@ xlog_ticket_alloc( tic->t_trans_type = 0; if (xflags & XFS_LOG_PERM_RESERV) tic->t_flags |= XLOG_TIC_PERM_RESERV; - sv_init(&tic->t_wait, SV_DEFAULT, "logtick"); + init_waitqueue_head(&tic->t_wait); xlog_tic_reset_res(tic); @@ -3719,10 +3711,10 @@ xfs_log_force_umount( * action is protected by the GRANTLOCK. */ list_for_each_entry(tic, &log->l_reserveq, t_queue) - sv_signal(&tic->t_wait); + wake_up(&tic->t_wait); list_for_each_entry(tic, &log->l_writeq, t_queue) - sv_signal(&tic->t_wait); + wake_up(&tic->t_wait); spin_unlock(&log->l_grant_lock); if (!(log->l_iclog->ic_state & XLOG_STATE_IOERROR)) { diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c index f36f1a2..9dc8125 100644 --- a/fs/xfs/xfs_log_cil.c +++ b/fs/xfs/xfs_log_cil.c @@ -61,7 +61,7 @@ xlog_cil_init( INIT_LIST_HEAD(&cil->xc_committing); spin_lock_init(&cil->xc_cil_lock); init_rwsem(&cil->xc_ctx_lock); - sv_init(&cil->xc_commit_wait, SV_DEFAULT, "cilwait"); + init_waitqueue_head(&cil->xc_commit_wait); INIT_LIST_HEAD(&ctx->committing); INIT_LIST_HEAD(&ctx->busy_extents); @@ -563,7 +563,7 @@ restart: * It is still being pushed! Wait for the push to * complete, then start again from the beginning. */ - sv_wait(&cil->xc_commit_wait, 0, &cil->xc_cil_lock, 0); + xlog_wait(&cil->xc_commit_wait, &cil->xc_cil_lock); goto restart; } } @@ -587,7 +587,7 @@ restart: */ spin_lock(&cil->xc_cil_lock); ctx->commit_lsn = commit_lsn; - sv_broadcast(&cil->xc_commit_wait); + wake_up_all(&cil->xc_commit_wait); spin_unlock(&cil->xc_cil_lock); /* release the hounds! */ @@ -752,7 +752,7 @@ restart: * It is still being pushed! Wait for the push to * complete, then start again from the beginning. */ - sv_wait(&cil->xc_commit_wait, 0, &cil->xc_cil_lock, 0); + xlog_wait(&cil->xc_commit_wait, &cil->xc_cil_lock); goto restart; } if (ctx->sequence != sequence) diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 2f74c80..e2bb276 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -241,7 +241,7 @@ typedef struct xlog_res { } xlog_res_t; typedef struct xlog_ticket { - sv_t t_wait; /* ticket wait queue : 20 */ + wait_queue_head_t t_wait; /* ticket wait queue */ struct list_head t_queue; /* reserve/write queue */ xlog_tid_t t_tid; /* transaction identifier : 4 */ atomic_t t_ref; /* ticket reference count : 4 */ @@ -349,8 +349,8 @@ typedef union xlog_in_core2 { * and move everything else out to subsequent cachelines. */ typedef struct xlog_in_core { - sv_t ic_force_wait; - sv_t ic_write_wait; + wait_queue_head_t ic_force_wait; + wait_queue_head_t ic_write_wait; struct xlog_in_core *ic_next; struct xlog_in_core *ic_prev; struct xfs_buf *ic_bp; @@ -417,7 +417,7 @@ struct xfs_cil { struct xfs_cil_ctx *xc_ctx; struct rw_semaphore xc_ctx_lock; struct list_head xc_committing; - sv_t xc_commit_wait; + wait_queue_head_t xc_commit_wait; xfs_lsn_t xc_current_sequence; }; @@ -499,7 +499,7 @@ typedef struct log { int l_logBBsize; /* size of log in BB chunks */ /* The following block of fields are changed while holding icloglock */ - sv_t l_flush_wait ____cacheline_aligned_in_smp; + wait_queue_head_t l_flush_wait ____cacheline_aligned_in_smp; /* waiting for iclog flush */ int l_covered_state;/* state of "covering disk * log entries" */ @@ -602,6 +602,21 @@ xlog_cil_force(struct log *log) */ #define XLOG_UNMOUNT_REC_TYPE (-1U) +/* + * Wrapper function for waiting on a wait queue serialised against wakeups + * by a spinlock. This matches the semantics of all the wait queues used in the + * log code. + */ +static inline void xlog_wait(wait_queue_head_t *wq, spinlock_t *lock) +{ + DECLARE_WAITQUEUE(wait, current); + + add_wait_queue_exclusive(wq, &wait); + __set_current_state(TASK_UNINTERRUPTIBLE); + spin_unlock(lock); + schedule(); + remove_wait_queue(wq, &wait); +} #endif /* __KERNEL__ */ #endif /* __XFS_LOG_PRIV_H__ */ -- 1.7.2.3 From SRS0+CBlE+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SMq1244793 for ; Tue, 21 Dec 2010 01:28:22 -0600 X-ASG-Debug-ID: 1292916617-17c903b50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7AA271470326 for ; Mon, 20 Dec 2010 23:30:18 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id VnlKOKGMmlvwTnJG for ; Mon, 20 Dec 2010 23:30:18 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50434443-1927428 for ; Tue, 21 Dec 2010 18:00:17 +1030 (CDT) Received: from [192.168.1.1] (helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfn-0001Da-Dn for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:15 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfS-0006Zo-5D for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:54 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 24/34] xfs: fact out common grant head/log tail verification code Subject: [PATCH 24/34] xfs: fact out common grant head/log tail verification code Date: Tue, 21 Dec 2010 18:29:20 +1100 Message-Id: <1292916570-25015-25-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1292916619 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50052 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Factor repeated debug code out of grant head manipulation functions into a separate function. This removes ifdef DEBUG spagetti from the code and makes the code easier to follow. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_log.c | 51 ++++++++++++++++++++++----------------------------- 1 files changed, 22 insertions(+), 29 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 1b82735..99c6285 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -82,6 +82,7 @@ STATIC void xlog_ungrant_log_space(xlog_t *log, #if defined(DEBUG) STATIC void xlog_verify_dest_ptr(xlog_t *log, char *ptr); STATIC void xlog_verify_grant_head(xlog_t *log, int equals); +STATIC void xlog_verify_grant_tail(struct log *log); STATIC void xlog_verify_iclog(xlog_t *log, xlog_in_core_t *iclog, int count, boolean_t syncing); STATIC void xlog_verify_tail_lsn(xlog_t *log, xlog_in_core_t *iclog, @@ -89,6 +90,7 @@ STATIC void xlog_verify_tail_lsn(xlog_t *log, xlog_in_core_t *iclog, #else #define xlog_verify_dest_ptr(a,b) #define xlog_verify_grant_head(a,b) +#define xlog_verify_grant_tail(a) #define xlog_verify_iclog(a,b,c,d) #define xlog_verify_tail_lsn(a,b,c) #endif @@ -2503,10 +2505,6 @@ xlog_grant_log_space(xlog_t *log, { int free_bytes; int need_bytes; -#ifdef DEBUG - xfs_lsn_t tail_lsn; -#endif - #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) @@ -2577,21 +2575,9 @@ redo: /* we've got enough space */ xlog_grant_add_space(log, need_bytes); -#ifdef DEBUG - tail_lsn = log->l_tail_lsn; - /* - * Check to make sure the grant write head didn't just over lap the - * tail. If the cycles are the same, we can't be overlapping. - * Otherwise, make sure that the cycles differ by exactly one and - * check the byte count. - */ - if (CYCLE_LSN(tail_lsn) != log->l_grant_write_cycle) { - ASSERT(log->l_grant_write_cycle-1 == CYCLE_LSN(tail_lsn)); - ASSERT(log->l_grant_write_bytes <= BBTOB(BLOCK_LSN(tail_lsn))); - } -#endif trace_xfs_log_grant_exit(log, tic); xlog_verify_grant_head(log, 1); + xlog_verify_grant_tail(log); spin_unlock(&log->l_grant_lock); return 0; @@ -2621,9 +2607,6 @@ xlog_regrant_write_log_space(xlog_t *log, xlog_ticket_t *tic) { int free_bytes, need_bytes; -#ifdef DEBUG - xfs_lsn_t tail_lsn; -#endif tic->t_curr_res = tic->t_unit_res; xlog_tic_reset_res(tic); @@ -2719,17 +2702,9 @@ redo: /* we've got enough space */ xlog_grant_add_space_write(log, need_bytes); -#ifdef DEBUG - tail_lsn = log->l_tail_lsn; - if (CYCLE_LSN(tail_lsn) != log->l_grant_write_cycle) { - ASSERT(log->l_grant_write_cycle-1 == CYCLE_LSN(tail_lsn)); - ASSERT(log->l_grant_write_bytes <= BBTOB(BLOCK_LSN(tail_lsn))); - } -#endif - trace_xfs_log_regrant_write_exit(log, tic); - xlog_verify_grant_head(log, 1); + xlog_verify_grant_tail(log); spin_unlock(&log->l_grant_lock); return 0; @@ -3465,6 +3440,24 @@ xlog_verify_grant_head(xlog_t *log, int equals) } } /* xlog_verify_grant_head */ +STATIC void +xlog_verify_grant_tail( + struct log *log) +{ + xfs_lsn_t tail_lsn = log->l_tail_lsn; + + /* + * Check to make sure the grant write head didn't just over lap the + * tail. If the cycles are the same, we can't be overlapping. + * Otherwise, make sure that the cycles differ by exactly one and + * check the byte count. + */ + if (CYCLE_LSN(tail_lsn) != log->l_grant_write_cycle) { + ASSERT(log->l_grant_write_cycle - 1 == CYCLE_LSN(tail_lsn)); + ASSERT(log->l_grant_write_bytes <= BBTOB(BLOCK_LSN(tail_lsn))); + } +} + /* check if it will fit */ STATIC void xlog_verify_tail_lsn(xlog_t *log, -- 1.7.2.3 From SRS0+K7iM+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:32 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_61 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SVct244895 for ; Tue, 21 Dec 2010 01:28:32 -0600 X-ASG-Debug-ID: 1292916627-362902330000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 40209212031 for ; Mon, 20 Dec 2010 23:30:27 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id 6R9kk4J9kkPdL7U4 for ; Mon, 20 Dec 2010 23:30:27 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 5388621-1927428 for ; Tue, 21 Dec 2010 18:00:26 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfd-0001DQ-86 for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:05 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfR-0006Zd-TM for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:53 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 20/34] xfs: remove all the inodes on a buffer from the AIL in bulk Subject: [PATCH 20/34] xfs: remove all the inodes on a buffer from the AIL in bulk Date: Tue, 21 Dec 2010 18:29:16 +1100 Message-Id: <1292916570-25015-21-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292916629 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner When inode buffer IO completes, usually all of the inodes are removed from the AIL. This involves processing them one at a time and taking the AIL lock once for every inode. When all CPUs are processing inode IO completions, this causes excessive amount sof contention on the AIL lock. Instead, change the way we process inode IO completion in the buffer IO done callback. Allow the inode IO done callback to walk the list of IO done callbacks and pull all the inodes off the buffer in one go and then process them as a batch. Once all the inodes for removal are collected, take the AIL lock once and do a bulk removal operation to minimise traffic on the AIL lock. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_inode_item.c | 92 ++++++++++++++++++++++++++++++++++++++--------- fs/xfs/xfs_trans_ail.c | 73 +++++++++++++++++++++++++++++++++++++ fs/xfs/xfs_trans_priv.h | 4 ++ 3 files changed, 152 insertions(+), 17 deletions(-) diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c index 7c8d30c..fd4f398 100644 --- a/fs/xfs/xfs_inode_item.c +++ b/fs/xfs/xfs_inode_item.c @@ -842,15 +842,64 @@ xfs_inode_item_destroy( * flushed to disk. It is responsible for removing the inode item * from the AIL if it has not been re-logged, and unlocking the inode's * flush lock. + * + * To reduce AIL lock traffic as much as possible, we scan the buffer log item + * list for other inodes that will run this function. We remove them from the + * buffer list so we can process all the inode IO completions in one AIL lock + * traversal. */ void xfs_iflush_done( struct xfs_buf *bp, struct xfs_log_item *lip) { - struct xfs_inode_log_item *iip = INODE_ITEM(lip); - xfs_inode_t *ip = iip->ili_inode; + struct xfs_inode_log_item *iip; + struct xfs_log_item *blip; + struct xfs_log_item *next; + struct xfs_log_item *prev; struct xfs_ail *ailp = lip->li_ailp; + int need_ail = 0; + + /* + * Scan the buffer IO completions for other inodes being completed and + * attach them to the current inode log item. + */ + blip = XFS_BUF_FSPRIVATE(bp, xfs_log_item_t *); + prev = NULL; + while (blip != NULL) { + if (lip->li_cb != xfs_iflush_done) { + prev = blip; + blip = blip->li_bio_list; + continue; + } + + /* remove from list */ + next = blip->li_bio_list; + if (!prev) { + XFS_BUF_SET_FSPRIVATE(bp, next); + } else { + prev->li_bio_list = next; + } + + /* add to current list */ + blip->li_bio_list = lip->li_bio_list; + lip->li_bio_list = blip; + + /* + * while we have the item, do the unlocked check for needing + * the AIL lock. + */ + iip = INODE_ITEM(blip); + if (iip->ili_logged && blip->li_lsn == iip->ili_flush_lsn) + need_ail++; + + blip = next; + } + + /* make sure we capture the state of the initial inode. */ + iip = INODE_ITEM(lip); + if (iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) + need_ail++; /* * We only want to pull the item from the AIL if it is @@ -861,28 +910,37 @@ xfs_iflush_done( * the lock since it's cheaper, and then we recheck while * holding the lock before removing the inode from the AIL. */ - if (iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) { + if (need_ail) { + struct xfs_log_item *log_items[need_ail]; + int i = 0; spin_lock(&ailp->xa_lock); - if (lip->li_lsn == iip->ili_flush_lsn) { - /* xfs_trans_ail_delete() drops the AIL lock. */ - xfs_trans_ail_delete(ailp, lip); - } else { - spin_unlock(&ailp->xa_lock); + for (blip = lip; blip; blip = blip->li_bio_list) { + iip = INODE_ITEM(blip); + if (iip->ili_logged && + blip->li_lsn == iip->ili_flush_lsn) { + log_items[i++] = blip; + } + ASSERT(i <= need_ail); } + /* xfs_trans_ail_delete_bulk() drops the AIL lock. */ + xfs_trans_ail_delete_bulk(ailp, log_items, i); } - iip->ili_logged = 0; /* - * Clear the ili_last_fields bits now that we know that the - * data corresponding to them is safely on disk. + * clean up and unlock the flush lock now we are done. We can clear the + * ili_last_fields bits now that we know that the data corresponding to + * them is safely on disk. */ - iip->ili_last_fields = 0; + for (blip = lip; blip; blip = next) { + next = blip->li_bio_list; + blip->li_bio_list = NULL; - /* - * Release the inode's flush lock since we're done with it. - */ - xfs_ifunlock(ip); + iip = INODE_ITEM(blip); + iip->ili_logged = 0; + iip->ili_last_fields = 0; + xfs_ifunlock(iip->ili_inode); + } } /* diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c index fe991a7..218f968 100644 --- a/fs/xfs/xfs_trans_ail.c +++ b/fs/xfs/xfs_trans_ail.c @@ -639,6 +639,79 @@ xfs_trans_ail_delete( } } +/* + * xfs_trans_ail_delete_bulk - remove multiple log items from the AIL + * + * @xfs_trans_ail_delete_bulk takes an array of log items that all need to + * removed from the AIL. The caller is already holding the AIL lock, and done + * all the checks necessary to ensure the items passed in via @log_items are + * ready for deletion. This includes checking that the items are in the AIL. + * + * For each log item to be removed, unlink it from the AIL, clear the IN_AIL + * flag from the item and reset the item's lsn to 0. If we remove the first + * item in the AIL, update the log tail to match the new minimum LSN in the + * AIL. + * + * This function will not drop the AIL lock until all items are removed from + * the AIL to minimise the amount of lock traffic on the AIL. This does not + * greatly increase the AIL hold time, but does significantly reduce the amount + * of traffic on the lock, especially during IO completion. + * + * This function must be called with the AIL lock held. The lock is dropped + * before returning. + */ +void +xfs_trans_ail_delete_bulk( + struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items) __releases(ailp->xa_lock) +{ + xfs_log_item_t *mlip; + xfs_lsn_t tail_lsn; + int mlip_changed = 0; + int i; + + mlip = xfs_ail_min(ailp); + + for (i = 0; i < nr_items; i++) { + struct xfs_log_item *lip = log_items[i]; + if (!(lip->li_flags & XFS_LI_IN_AIL)) { + struct xfs_mount *mp = ailp->xa_mount; + + spin_unlock(&ailp->xa_lock); + if (!XFS_FORCED_SHUTDOWN(mp)) { + xfs_cmn_err(XFS_PTAG_AILDELETE, CE_ALERT, mp, + "%s: attempting to delete a log item that is not in the AIL", + __func__); + xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE); + } + return; + } + + xfs_ail_delete(ailp, lip); + lip->li_flags &= ~XFS_LI_IN_AIL; + lip->li_lsn = 0; + if (mlip == lip) + mlip_changed = 1; + } + + if (!mlip_changed) { + spin_unlock(&ailp->xa_lock); + return; + } + + /* + * It is not safe to access mlip after the AIL lock is dropped, so we + * must get a copy of li_lsn before we do so. This is especially + * important on 32-bit platforms where accessing and updating 64-bit + * values like li_lsn is not atomic. It is possible we've emptied the + * AIL here, so if that is the case, pass an LSN of 0 to the tail move. + */ + mlip = xfs_ail_min(ailp); + tail_lsn = mlip ? mlip->li_lsn : 0; + spin_unlock(&ailp->xa_lock); + xfs_log_move_tail(ailp->xa_mount, tail_lsn); +} /* diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h index e039729..246ca4d 100644 --- a/fs/xfs/xfs_trans_priv.h +++ b/fs/xfs/xfs_trans_priv.h @@ -85,6 +85,10 @@ void xfs_trans_ail_update_bulk(struct xfs_ail *ailp, void xfs_trans_ail_delete(struct xfs_ail *ailp, struct xfs_log_item *lip) __releases(ailp->xa_lock); +void xfs_trans_ail_delete_bulk(struct xfs_ail *ailp, + struct xfs_log_item **log_items, + int nr_items) + __releases(ailp->xa_lock); void xfs_trans_ail_push(struct xfs_ail *, xfs_lsn_t); void xfs_trans_unlocked_item(struct xfs_ail *, xfs_log_item_t *); -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:32 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SVXw244893 for ; Tue, 21 Dec 2010 01:28:32 -0600 X-ASG-Debug-ID: 1292916627-40d600b60000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C7A691470328 for ; Mon, 20 Dec 2010 23:30:27 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id rYS4GVXXi1GtZrxF for ; Mon, 20 Dec 2010 23:30:27 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50575236-1927428 for ; Tue, 21 Dec 2010 18:00:26 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfn-0001Do-6J for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:15 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfR-0006Za-Re for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:53 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 19/34] xfs: consume iodone callback items on buffers as they are processed Subject: [PATCH 19/34] xfs: consume iodone callback items on buffers as they are processed Date: Tue, 21 Dec 2010 18:29:15 +1100 Message-Id: <1292916570-25015-20-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292916628 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50052 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner To allow buffer iodone callbacks to consume multiple items off the callback list, first we need to convert the xfs_buf_do_callbacks() to consume items and always pull the next item from the head of the list. The means the item list walk is never dependent on knowing the next item on the list and hence allows callbacks to remove items from the list as well. This allows callbacks to do bulk operations by scanning the list for identical callbacks, consuming them all and then processing them in bulk, negating the need for multiple callbacks of that type. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_buf_item.c | 32 +++++++++++++++++++++----------- 1 files changed, 21 insertions(+), 11 deletions(-) diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c index 2686d0d..ed2b65f 100644 --- a/fs/xfs/xfs_buf_item.c +++ b/fs/xfs/xfs_buf_item.c @@ -142,7 +142,7 @@ xfs_buf_item_log_check( #endif STATIC void xfs_buf_error_relse(xfs_buf_t *bp); -STATIC void xfs_buf_do_callbacks(xfs_buf_t *bp, xfs_log_item_t *lip); +STATIC void xfs_buf_do_callbacks(struct xfs_buf *bp); /* * This returns the number of log iovecs needed to log the @@ -450,7 +450,7 @@ xfs_buf_item_unpin( * xfs_trans_ail_delete() drops the AIL lock. */ if (bip->bli_flags & XFS_BLI_STALE_INODE) { - xfs_buf_do_callbacks(bp, (xfs_log_item_t *)bip); + xfs_buf_do_callbacks(bp); XFS_BUF_SET_FSPRIVATE(bp, NULL); XFS_BUF_CLR_IODONE_FUNC(bp); } else { @@ -918,15 +918,26 @@ xfs_buf_attach_iodone( XFS_BUF_SET_IODONE_FUNC(bp, xfs_buf_iodone_callbacks); } +/* + * We can have many callbacks on a buffer. Running the callbacks individually + * can cause a lot of contention on the AIL lock, so we allow for a single + * callback to be able to scan the remaining lip->li_bio_list for other items + * of the same type and callback to be processed in the first call. + * + * As a result, the loop walking the callback list below will also modify the + * list. it removes the first item from the list and then runs the callback. + * The loop then restarts from the new head of the list. This allows the + * callback to scan and modify the list attached to the buffer and we don't + * have to care about maintaining a next item pointer. + */ STATIC void xfs_buf_do_callbacks( - xfs_buf_t *bp, - xfs_log_item_t *lip) + struct xfs_buf *bp) { - xfs_log_item_t *nlip; + struct xfs_log_item *lip; - while (lip != NULL) { - nlip = lip->li_bio_list; + while ((lip = XFS_BUF_FSPRIVATE(bp, xfs_log_item_t *)) != NULL) { + XFS_BUF_SET_FSPRIVATE(bp, lip->li_bio_list); ASSERT(lip->li_cb != NULL); /* * Clear the next pointer so we don't have any @@ -936,7 +947,6 @@ xfs_buf_do_callbacks( */ lip->li_bio_list = NULL; lip->li_cb(bp, lip); - lip = nlip; } } @@ -970,7 +980,7 @@ xfs_buf_iodone_callbacks( ASSERT(XFS_BUF_TARGET(bp) == mp->m_ddev_targp); XFS_BUF_SUPER_STALE(bp); trace_xfs_buf_item_iodone(bp, _RET_IP_); - xfs_buf_do_callbacks(bp, lip); + xfs_buf_do_callbacks(bp); XFS_BUF_SET_FSPRIVATE(bp, NULL); XFS_BUF_CLR_IODONE_FUNC(bp); xfs_buf_ioend(bp, 0); @@ -1029,7 +1039,7 @@ xfs_buf_iodone_callbacks( return; } - xfs_buf_do_callbacks(bp, lip); + xfs_buf_do_callbacks(bp); XFS_BUF_SET_FSPRIVATE(bp, NULL); XFS_BUF_CLR_IODONE_FUNC(bp); xfs_buf_ioend(bp, 0); @@ -1063,7 +1073,7 @@ xfs_buf_error_relse( * We have to unpin the pinned buffers so do the * callbacks. */ - xfs_buf_do_callbacks(bp, lip); + xfs_buf_do_callbacks(bp); XFS_BUF_SET_FSPRIVATE(bp, NULL); XFS_BUF_CLR_IODONE_FUNC(bp); XFS_BUF_SET_BRELSE_FUNC(bp,NULL); -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:34 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SXv5244913 for ; Tue, 21 Dec 2010 01:28:34 -0600 X-ASG-Debug-ID: 1292916628-4a9600000000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7B3F1147032A for ; Mon, 20 Dec 2010 23:30:29 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id fmOCwNABDGSibCgo for ; Mon, 20 Dec 2010 23:30:29 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 39223400-1927428 for ; Tue, 21 Dec 2010 18:00:27 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfs-0001EB-Hr for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:20 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfc-0006Zr-5m for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:04 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 25/34] xfs: rework log grant space calculations Subject: [PATCH 25/34] xfs: rework log grant space calculations Date: Tue, 21 Dec 2010 18:29:21 +1100 Message-Id: <1292916570-25015-26-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292916630 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50052 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The log grant space calculations are repeated for both write and reserve grant heads. To make it simpler to convert the calculations toa different algorithm, factor them so both the gratn heads use the same calculation functions. Once this is done we can drop the wrappers that are used in only a couple of place to update both grant heads at once as they don't provide any particular value. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_log.c | 95 +++++++++++++++++++++++++++-------------------------- 1 files changed, 48 insertions(+), 47 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 99c6285..9a4b9ed 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -98,53 +98,34 @@ STATIC void xlog_verify_tail_lsn(xlog_t *log, xlog_in_core_t *iclog, STATIC int xlog_iclogs_empty(xlog_t *log); static void -xlog_grant_sub_space(struct log *log, int bytes) -{ - log->l_grant_write_bytes -= bytes; - if (log->l_grant_write_bytes < 0) { - log->l_grant_write_bytes += log->l_logsize; - log->l_grant_write_cycle--; - } - - log->l_grant_reserve_bytes -= bytes; - if ((log)->l_grant_reserve_bytes < 0) { - log->l_grant_reserve_bytes += log->l_logsize; - log->l_grant_reserve_cycle--; - } - -} - -static void -xlog_grant_add_space_write(struct log *log, int bytes) +xlog_grant_sub_space( + struct log *log, + int *cycle, + int *space, + int bytes) { - int tmp = log->l_logsize - log->l_grant_write_bytes; - if (tmp > bytes) - log->l_grant_write_bytes += bytes; - else { - log->l_grant_write_cycle++; - log->l_grant_write_bytes = bytes - tmp; + *space -= bytes; + if (*space < 0) { + *space += log->l_logsize; + (*cycle)--; } } static void -xlog_grant_add_space_reserve(struct log *log, int bytes) +xlog_grant_add_space( + struct log *log, + int *cycle, + int *space, + int bytes) { - int tmp = log->l_logsize - log->l_grant_reserve_bytes; + int tmp = log->l_logsize - *space; if (tmp > bytes) - log->l_grant_reserve_bytes += bytes; + *space += bytes; else { - log->l_grant_reserve_cycle++; - log->l_grant_reserve_bytes = bytes - tmp; + *space = bytes - tmp; + (*cycle)++; } } - -static inline void -xlog_grant_add_space(struct log *log, int bytes) -{ - xlog_grant_add_space_write(log, bytes); - xlog_grant_add_space_reserve(log, bytes); -} - static void xlog_tic_reset_res(xlog_ticket_t *tic) { @@ -1344,7 +1325,10 @@ xlog_sync(xlog_t *log, /* move grant heads by roundoff in sync */ spin_lock(&log->l_grant_lock); - xlog_grant_add_space(log, roundoff); + xlog_grant_add_space(log, &log->l_grant_reserve_cycle, + &log->l_grant_reserve_bytes, roundoff); + xlog_grant_add_space(log, &log->l_grant_write_cycle, + &log->l_grant_write_bytes, roundoff); spin_unlock(&log->l_grant_lock); /* put cycle number in every block */ @@ -2574,7 +2558,10 @@ redo: list_del_init(&tic->t_queue); /* we've got enough space */ - xlog_grant_add_space(log, need_bytes); + xlog_grant_add_space(log, &log->l_grant_reserve_cycle, + &log->l_grant_reserve_bytes, need_bytes); + xlog_grant_add_space(log, &log->l_grant_write_cycle, + &log->l_grant_write_bytes, need_bytes); trace_xfs_log_grant_exit(log, tic); xlog_verify_grant_head(log, 1); xlog_verify_grant_tail(log); @@ -2701,7 +2688,8 @@ redo: list_del_init(&tic->t_queue); /* we've got enough space */ - xlog_grant_add_space_write(log, need_bytes); + xlog_grant_add_space(log, &log->l_grant_write_cycle, + &log->l_grant_write_bytes, need_bytes); trace_xfs_log_regrant_write_exit(log, tic); xlog_verify_grant_head(log, 1); xlog_verify_grant_tail(log); @@ -2742,7 +2730,12 @@ xlog_regrant_reserve_log_space(xlog_t *log, ticket->t_cnt--; spin_lock(&log->l_grant_lock); - xlog_grant_sub_space(log, ticket->t_curr_res); + xlog_grant_sub_space(log, &log->l_grant_reserve_cycle, + &log->l_grant_reserve_bytes, + ticket->t_curr_res); + xlog_grant_sub_space(log, &log->l_grant_write_cycle, + &log->l_grant_write_bytes, + ticket->t_curr_res); ticket->t_curr_res = ticket->t_unit_res; xlog_tic_reset_res(ticket); @@ -2756,7 +2749,9 @@ xlog_regrant_reserve_log_space(xlog_t *log, return; } - xlog_grant_add_space_reserve(log, ticket->t_unit_res); + xlog_grant_add_space(log, &log->l_grant_reserve_cycle, + &log->l_grant_reserve_bytes, + ticket->t_unit_res); trace_xfs_log_regrant_reserve_exit(log, ticket); @@ -2785,24 +2780,30 @@ STATIC void xlog_ungrant_log_space(xlog_t *log, xlog_ticket_t *ticket) { + int bytes; + if (ticket->t_cnt > 0) ticket->t_cnt--; spin_lock(&log->l_grant_lock); trace_xfs_log_ungrant_enter(log, ticket); - - xlog_grant_sub_space(log, ticket->t_curr_res); - trace_xfs_log_ungrant_sub(log, ticket); - /* If this is a permanent reservation ticket, we may be able to free + /* + * If this is a permanent reservation ticket, we may be able to free * up more space based on the remaining count. */ + bytes = ticket->t_curr_res; if (ticket->t_cnt > 0) { ASSERT(ticket->t_flags & XLOG_TIC_PERM_RESERV); - xlog_grant_sub_space(log, ticket->t_unit_res*ticket->t_cnt); + bytes += ticket->t_unit_res*ticket->t_cnt; } + xlog_grant_sub_space(log, &log->l_grant_reserve_cycle, + &log->l_grant_reserve_bytes, bytes); + xlog_grant_sub_space(log, &log->l_grant_write_cycle, + &log->l_grant_write_bytes, bytes); + trace_xfs_log_ungrant_exit(log, ticket); xlog_verify_grant_head(log, 1); -- 1.7.2.3 From SRS0+K7iM+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:33 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SXJK244910 for ; Tue, 21 Dec 2010 01:28:33 -0600 X-ASG-Debug-ID: 1292916628-362d02530000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2AAC9212031 for ; Mon, 20 Dec 2010 23:30:28 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id TFPMHGGoKEdY7kYS for ; Mon, 20 Dec 2010 23:30:28 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 5388622-1927428 for ; Tue, 21 Dec 2010 18:00:27 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfy-0001EN-2e for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:26 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfm-0006aJ-NG for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:14 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 33/34] xfs: convert grant head manipulations to lockless algorithm Subject: [PATCH 33/34] xfs: convert grant head manipulations to lockless algorithm Date: Tue, 21 Dec 2010 18:29:29 +1100 Message-Id: <1292916570-25015-34-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292916630 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The only thing that the grant lock remains to protect is the grant head manipulations when adding or removing space from the log. These calculations are already based on atomic variables, so we can already update them safely without locks. However, the grant head manpulations require atomic multi-step calculations to be executed, which the algorithms currently don't allow. To make these multi-step calculations atomic, convert the algorithms to compare-and-exchange loops on the atomic variables. That is, we sample the old value, perform the calculation and use atomic64_cmpxchg() to attempt to update the head with the new value. If the head has not changed since we sampled it, it will succeed and we are done. Otherwise, we rerun the calculation again from a new sample of the head. This allows us to remove the grant lock from around all the grant head space manipulations, and that effectively removes the grant lock from the log completely. Hence we can remove the grant lock completely from the log at this point. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_log.c | 103 ++++++++++++++++--------------------------------- fs/xfs/xfs_log_priv.h | 23 +++++++---- 2 files changed, 49 insertions(+), 77 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 6fcc9d0..0bf24b1 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -81,7 +81,6 @@ STATIC void xlog_ungrant_log_space(xlog_t *log, #if defined(DEBUG) STATIC void xlog_verify_dest_ptr(xlog_t *log, char *ptr); -STATIC void xlog_verify_grant_head(xlog_t *log, int equals); STATIC void xlog_verify_grant_tail(struct log *log); STATIC void xlog_verify_iclog(xlog_t *log, xlog_in_core_t *iclog, int count, boolean_t syncing); @@ -89,7 +88,6 @@ STATIC void xlog_verify_tail_lsn(xlog_t *log, xlog_in_core_t *iclog, xfs_lsn_t tail_lsn); #else #define xlog_verify_dest_ptr(a,b) -#define xlog_verify_grant_head(a,b) #define xlog_verify_grant_tail(a) #define xlog_verify_iclog(a,b,c,d) #define xlog_verify_tail_lsn(a,b,c) @@ -103,17 +101,24 @@ xlog_grant_sub_space( atomic64_t *head, int bytes) { - int cycle, space; + int64_t head_val = atomic64_read(head); + int64_t new, old; - xlog_crack_grant_head(head, &cycle, &space); + do { + int cycle, space; - space -= bytes; - if (space < 0) { - space += log->l_logsize; - cycle--; - } + xlog_crack_grant_head_val(head_val, &cycle, &space); - xlog_assign_grant_head(head, cycle, space); + space -= bytes; + if (space < 0) { + space += log->l_logsize; + cycle--; + } + + old = head_val; + new = xlog_assign_grant_head_val(cycle, space); + head_val = atomic64_cmpxchg(head, old, new); + } while (head_val != old); } static void @@ -122,20 +127,27 @@ xlog_grant_add_space( atomic64_t *head, int bytes) { - int tmp; - int cycle, space; + int64_t head_val = atomic64_read(head); + int64_t new, old; - xlog_crack_grant_head(head, &cycle, &space); + do { + int tmp; + int cycle, space; - tmp = log->l_logsize - space; - if (tmp > bytes) - space += bytes; - else { - space = bytes - tmp; - cycle++; - } + xlog_crack_grant_head_val(head_val, &cycle, &space); - xlog_assign_grant_head(head, cycle, space); + tmp = log->l_logsize - space; + if (tmp > bytes) + space += bytes; + else { + space = bytes - tmp; + cycle++; + } + + old = head_val; + new = xlog_assign_grant_head_val(cycle, space); + head_val = atomic64_cmpxchg(head, old, new); + } while (head_val != old); } static void @@ -318,9 +330,7 @@ xfs_log_reserve( trace_xfs_log_reserve(log, internal_ticket); - spin_lock(&log->l_grant_lock); xlog_grant_push_ail(log, internal_ticket->t_unit_res); - spin_unlock(&log->l_grant_lock); retval = xlog_regrant_write_log_space(log, internal_ticket); } else { /* may sleep if need to allocate more tickets */ @@ -334,11 +344,9 @@ xfs_log_reserve( trace_xfs_log_reserve(log, internal_ticket); - spin_lock(&log->l_grant_lock); xlog_grant_push_ail(log, (internal_ticket->t_unit_res * internal_ticket->t_cnt)); - spin_unlock(&log->l_grant_lock); retval = xlog_grant_log_space(log, internal_ticket); } @@ -1057,7 +1065,6 @@ xlog_alloc_log(xfs_mount_t *mp, log->l_xbuf = bp; spin_lock_init(&log->l_icloglock); - spin_lock_init(&log->l_grant_lock); init_waitqueue_head(&log->l_flush_wait); /* log record size must be multiple of BBSIZE; see xlog_rec_header_t */ @@ -1135,7 +1142,6 @@ out_free_iclog: kmem_free(iclog); } spinlock_destroy(&log->l_icloglock); - spinlock_destroy(&log->l_grant_lock); xfs_buf_free(log->l_xbuf); out_free_log: kmem_free(log); @@ -1331,10 +1337,8 @@ xlog_sync(xlog_t *log, roundoff < BBTOB(1))); /* move grant heads by roundoff in sync */ - spin_lock(&log->l_grant_lock); xlog_grant_add_space(log, &log->l_grant_reserve_head, roundoff); xlog_grant_add_space(log, &log->l_grant_write_head, roundoff); - spin_unlock(&log->l_grant_lock); /* put cycle number in every block */ xlog_pack_data(log, iclog, roundoff); @@ -1455,7 +1459,6 @@ xlog_dealloc_log(xlog_t *log) iclog = next_iclog; } spinlock_destroy(&log->l_icloglock); - spinlock_destroy(&log->l_grant_lock); xfs_buf_free(log->l_xbuf); log->l_mp->m_log = NULL; @@ -2574,13 +2577,10 @@ redo: } /* we've got enough space */ - spin_lock(&log->l_grant_lock); xlog_grant_add_space(log, &log->l_grant_reserve_head, need_bytes); xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_grant_exit(log, tic); - xlog_verify_grant_head(log, 1); xlog_verify_grant_tail(log); - spin_unlock(&log->l_grant_lock); return 0; error_return_unlocked: @@ -2694,12 +2694,9 @@ redo: } /* we've got enough space */ - spin_lock(&log->l_grant_lock); xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_regrant_write_exit(log, tic); - xlog_verify_grant_head(log, 1); xlog_verify_grant_tail(log); - spin_unlock(&log->l_grant_lock); return 0; @@ -2737,7 +2734,6 @@ xlog_regrant_reserve_log_space(xlog_t *log, if (ticket->t_cnt > 0) ticket->t_cnt--; - spin_lock(&log->l_grant_lock); xlog_grant_sub_space(log, &log->l_grant_reserve_head, ticket->t_curr_res); xlog_grant_sub_space(log, &log->l_grant_write_head, @@ -2747,21 +2743,15 @@ xlog_regrant_reserve_log_space(xlog_t *log, trace_xfs_log_regrant_reserve_sub(log, ticket); - xlog_verify_grant_head(log, 1); - /* just return if we still have some of the pre-reserved space */ - if (ticket->t_cnt > 0) { - spin_unlock(&log->l_grant_lock); + if (ticket->t_cnt > 0) return; - } xlog_grant_add_space(log, &log->l_grant_reserve_head, ticket->t_unit_res); trace_xfs_log_regrant_reserve_exit(log, ticket); - xlog_verify_grant_head(log, 0); - spin_unlock(&log->l_grant_lock); ticket->t_curr_res = ticket->t_unit_res; xlog_tic_reset_res(ticket); } /* xlog_regrant_reserve_log_space */ @@ -2790,7 +2780,6 @@ xlog_ungrant_log_space(xlog_t *log, if (ticket->t_cnt > 0) ticket->t_cnt--; - spin_lock(&log->l_grant_lock); trace_xfs_log_ungrant_enter(log, ticket); trace_xfs_log_ungrant_sub(log, ticket); @@ -2809,8 +2798,6 @@ xlog_ungrant_log_space(xlog_t *log, trace_xfs_log_ungrant_exit(log, ticket); - xlog_verify_grant_head(log, 1); - spin_unlock(&log->l_grant_lock); xfs_log_move_tail(log->l_mp, 1); } /* xlog_ungrant_log_space */ @@ -3429,28 +3416,6 @@ xlog_verify_dest_ptr( } STATIC void -xlog_verify_grant_head(xlog_t *log, int equals) -{ - int reserve_cycle, reserve_space; - int write_cycle, write_space; - - xlog_crack_grant_head(&log->l_grant_reserve_head, - &reserve_cycle, &reserve_space); - xlog_crack_grant_head(&log->l_grant_write_head, - &write_cycle, &write_space); - - if (reserve_cycle == write_cycle) { - if (equals) - ASSERT(reserve_space >= write_space); - else - ASSERT(reserve_space > write_space); - } else { - ASSERT(reserve_cycle - 1 == write_cycle); - ASSERT(write_space >= reserve_space); - } -} - -STATIC void xlog_verify_grant_tail( struct log *log) { diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index befb2fc..d5f8be8 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -510,9 +510,6 @@ typedef struct log { int l_curr_block; /* current logical log block */ int l_prev_block; /* previous logical log block */ - /* The following block of fields are changed while holding grant_lock */ - spinlock_t l_grant_lock ____cacheline_aligned_in_smp; - /* * l_last_sync_lsn and l_tail_lsn are atomics so they can be set and * read without needing to hold specific locks. To avoid operations @@ -599,23 +596,33 @@ xlog_assign_atomic_lsn(atomic64_t *lsn, uint cycle, uint block) } /* - * When we crack the grrant head, we sample it first so that the value will not + * When we crack the grant head, we sample it first so that the value will not * change while we are cracking it into the component values. This means we * will always get consistent component values to work from. */ static inline void -xlog_crack_grant_head(atomic64_t *head, int *cycle, int *space) +xlog_crack_grant_head_val(int64_t val, int *cycle, int *space) { - int64_t val = atomic64_read(head); - *cycle = val >> 32; *space = val & 0xffffffff; } static inline void +xlog_crack_grant_head(atomic64_t *head, int *cycle, int *space) +{ + xlog_crack_grant_head_val(atomic64_read(head), cycle, space); +} + +static inline int64_t +xlog_assign_grant_head_val(int cycle, int space) +{ + return ((int64_t)cycle << 32) | space; +} + +static inline void xlog_assign_grant_head(atomic64_t *head, int cycle, int space) { - atomic64_set(head, ((int64_t)cycle << 32) | space); + atomic64_set(head, xlog_assign_grant_head_val(cycle, space)); } /* -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:34 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_65 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SXrE244914 for ; Tue, 21 Dec 2010 01:28:34 -0600 X-ASG-Debug-ID: 1292916628-177303b90000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 36DEE1470328 for ; Mon, 20 Dec 2010 23:30:28 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id ZgUKcNdeHWlStF9i for ; Mon, 20 Dec 2010 23:30:28 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50575237-1927428 for ; Tue, 21 Dec 2010 18:00:27 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfn-0001E1-MG for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:15 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfc-0006Zw-Ae for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:04 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 26/34] xfs: combine grant heads into a single 64 bit integer Subject: [PATCH 26/34] xfs: combine grant heads into a single 64 bit integer Date: Tue, 21 Dec 2010 18:29:22 +1100 Message-Id: <1292916570-25015-27-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292916630 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50052 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Prepare for switching the grant heads to atomic variables by combining the two 32 bit values that make up the grant head into a single 64 bit variable. Provide wrapper functions to combine and split the grant heads appropriately for calculations and use them as necessary. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_trace.h | 10 ++- fs/xfs/xfs_log.c | 166 ++++++++++++++++++++++-------------------- fs/xfs/xfs_log_priv.h | 26 ++++++- fs/xfs/xfs_log_recover.c | 8 +- 4 files changed, 119 insertions(+), 91 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h index 69b9e1f..3ff6b35 100644 --- a/fs/xfs/linux-2.6/xfs_trace.h +++ b/fs/xfs/linux-2.6/xfs_trace.h @@ -786,10 +786,12 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, __entry->flags = tic->t_flags; __entry->reserveq = list_empty(&log->l_reserveq); __entry->writeq = list_empty(&log->l_writeq); - __entry->grant_reserve_cycle = log->l_grant_reserve_cycle; - __entry->grant_reserve_bytes = log->l_grant_reserve_bytes; - __entry->grant_write_cycle = log->l_grant_write_cycle; - __entry->grant_write_bytes = log->l_grant_write_bytes; + xlog_crack_grant_head(&log->l_grant_reserve_head, + &__entry->grant_reserve_cycle, + &__entry->grant_reserve_bytes); + xlog_crack_grant_head(&log->l_grant_write_head, + &__entry->grant_write_cycle, + &__entry->grant_write_bytes); __entry->curr_cycle = log->l_curr_cycle; __entry->curr_block = log->l_curr_block; __entry->tail_lsn = log->l_tail_lsn; diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 9a4b9ed..6bba8b4 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -47,7 +47,7 @@ STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp, xfs_buftarg_t *log_target, xfs_daddr_t blk_offset, int num_bblks); -STATIC int xlog_space_left(xlog_t *log, int cycle, int bytes); +STATIC int xlog_space_left(struct log *log, int64_t *head); STATIC int xlog_sync(xlog_t *log, xlog_in_core_t *iclog); STATIC void xlog_dealloc_log(xlog_t *log); @@ -100,32 +100,44 @@ STATIC int xlog_iclogs_empty(xlog_t *log); static void xlog_grant_sub_space( struct log *log, - int *cycle, - int *space, + int64_t *head, int bytes) { - *space -= bytes; - if (*space < 0) { - *space += log->l_logsize; - (*cycle)--; + int cycle, space; + + xlog_crack_grant_head(head, &cycle, &space); + + space -= bytes; + if (space < 0) { + space += log->l_logsize; + cycle--; } + + xlog_assign_grant_head(head, cycle, space); } static void xlog_grant_add_space( struct log *log, - int *cycle, - int *space, + int64_t *head, int bytes) { - int tmp = log->l_logsize - *space; + int tmp; + int cycle, space; + + xlog_crack_grant_head(head, &cycle, &space); + + tmp = log->l_logsize - space; if (tmp > bytes) - *space += bytes; + space += bytes; else { - *space = bytes - tmp; - (*cycle)++; + space = bytes - tmp; + cycle++; } + + xlog_assign_grant_head(head, cycle, space); } + static void xlog_tic_reset_res(xlog_ticket_t *tic) { @@ -654,7 +666,7 @@ xfs_log_move_tail(xfs_mount_t *mp, { xlog_ticket_t *tic; xlog_t *log = mp->m_log; - int need_bytes, free_bytes, cycle, bytes; + int need_bytes, free_bytes; if (XLOG_FORCED_SHUTDOWN(log)) return; @@ -680,9 +692,7 @@ xfs_log_move_tail(xfs_mount_t *mp, if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); #endif - cycle = log->l_grant_write_cycle; - bytes = log->l_grant_write_bytes; - free_bytes = xlog_space_left(log, cycle, bytes); + free_bytes = xlog_space_left(log, &log->l_grant_write_head); list_for_each_entry(tic, &log->l_writeq, t_queue) { ASSERT(tic->t_flags & XLOG_TIC_PERM_RESERV); @@ -699,9 +709,7 @@ xfs_log_move_tail(xfs_mount_t *mp, if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); #endif - cycle = log->l_grant_reserve_cycle; - bytes = log->l_grant_reserve_bytes; - free_bytes = xlog_space_left(log, cycle, bytes); + free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); list_for_each_entry(tic, &log->l_reserveq, t_queue) { if (tic->t_flags & XLOG_TIC_PERM_RESERV) need_bytes = tic->t_unit_res*tic->t_cnt; @@ -814,21 +822,26 @@ xlog_assign_tail_lsn(xfs_mount_t *mp) * result is that we return the size of the log as the amount of space left. */ STATIC int -xlog_space_left(xlog_t *log, int cycle, int bytes) +xlog_space_left( + struct log *log, + int64_t *head) { - int free_bytes; - int tail_bytes; - int tail_cycle; + int free_bytes; + int tail_bytes; + int tail_cycle; + int head_cycle; + int head_bytes; + xlog_crack_grant_head(head, &head_cycle, &head_bytes); tail_bytes = BBTOB(BLOCK_LSN(log->l_tail_lsn)); tail_cycle = CYCLE_LSN(log->l_tail_lsn); - if ((tail_cycle == cycle) && (bytes >= tail_bytes)) { - free_bytes = log->l_logsize - (bytes - tail_bytes); - } else if ((tail_cycle + 1) < cycle) { + if (tail_cycle == head_cycle && head_bytes >= tail_bytes) + free_bytes = log->l_logsize - (head_bytes - tail_bytes); + else if (tail_cycle + 1 < head_cycle) return 0; - } else if (tail_cycle < cycle) { - ASSERT(tail_cycle == (cycle - 1)); - free_bytes = tail_bytes - bytes; + else if (tail_cycle < head_cycle) { + ASSERT(tail_cycle == (head_cycle - 1)); + free_bytes = tail_bytes - head_bytes; } else { /* * The reservation head is behind the tail. @@ -839,12 +852,12 @@ xlog_space_left(xlog_t *log, int cycle, int bytes) "xlog_space_left: head behind tail\n" " tail_cycle = %d, tail_bytes = %d\n" " GH cycle = %d, GH bytes = %d", - tail_cycle, tail_bytes, cycle, bytes); + tail_cycle, tail_bytes, head_cycle, head_bytes); ASSERT(0); free_bytes = log->l_logsize; } return free_bytes; -} /* xlog_space_left */ +} /* @@ -1001,8 +1014,8 @@ xlog_alloc_log(xfs_mount_t *mp, /* log->l_tail_lsn = 0x100000000LL; cycle = 1; current block = 0 */ log->l_last_sync_lsn = log->l_tail_lsn; log->l_curr_cycle = 1; /* 0 is bad since this is initial value */ - log->l_grant_reserve_cycle = 1; - log->l_grant_write_cycle = 1; + xlog_assign_grant_head(&log->l_grant_reserve_head, 1, 0); + xlog_assign_grant_head(&log->l_grant_write_head, 1, 0); INIT_LIST_HEAD(&log->l_reserveq); INIT_LIST_HEAD(&log->l_writeq); @@ -1190,9 +1203,7 @@ xlog_grant_push_ail(xfs_mount_t *mp, ASSERT(BTOBB(need_bytes) < log->l_logBBsize); spin_lock(&log->l_grant_lock); - free_bytes = xlog_space_left(log, - log->l_grant_reserve_cycle, - log->l_grant_reserve_bytes); + free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); tail_lsn = log->l_tail_lsn; free_blocks = BTOBBT(free_bytes); @@ -1325,10 +1336,8 @@ xlog_sync(xlog_t *log, /* move grant heads by roundoff in sync */ spin_lock(&log->l_grant_lock); - xlog_grant_add_space(log, &log->l_grant_reserve_cycle, - &log->l_grant_reserve_bytes, roundoff); - xlog_grant_add_space(log, &log->l_grant_write_cycle, - &log->l_grant_write_bytes, roundoff); + xlog_grant_add_space(log, &log->l_grant_reserve_head, roundoff); + xlog_grant_add_space(log, &log->l_grant_write_head, roundoff); spin_unlock(&log->l_grant_lock); /* put cycle number in every block */ @@ -2531,8 +2540,7 @@ redo: if (XLOG_FORCED_SHUTDOWN(log)) goto error_return; - free_bytes = xlog_space_left(log, log->l_grant_reserve_cycle, - log->l_grant_reserve_bytes); + free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); if (free_bytes < need_bytes) { if (list_empty(&tic->t_queue)) list_add_tail(&tic->t_queue, &log->l_reserveq); @@ -2558,10 +2566,8 @@ redo: list_del_init(&tic->t_queue); /* we've got enough space */ - xlog_grant_add_space(log, &log->l_grant_reserve_cycle, - &log->l_grant_reserve_bytes, need_bytes); - xlog_grant_add_space(log, &log->l_grant_write_cycle, - &log->l_grant_write_bytes, need_bytes); + xlog_grant_add_space(log, &log->l_grant_reserve_head, need_bytes); + xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_grant_exit(log, tic); xlog_verify_grant_head(log, 1); xlog_verify_grant_tail(log); @@ -2622,8 +2628,7 @@ xlog_regrant_write_log_space(xlog_t *log, need_bytes = tic->t_unit_res; if (!list_empty(&log->l_writeq)) { struct xlog_ticket *ntic; - free_bytes = xlog_space_left(log, log->l_grant_write_cycle, - log->l_grant_write_bytes); + free_bytes = xlog_space_left(log, &log->l_grant_write_head); list_for_each_entry(ntic, &log->l_writeq, t_queue) { ASSERT(ntic->t_flags & XLOG_TIC_PERM_RESERV); @@ -2662,8 +2667,7 @@ redo: if (XLOG_FORCED_SHUTDOWN(log)) goto error_return; - free_bytes = xlog_space_left(log, log->l_grant_write_cycle, - log->l_grant_write_bytes); + free_bytes = xlog_space_left(log, &log->l_grant_write_head); if (free_bytes < need_bytes) { if (list_empty(&tic->t_queue)) list_add_tail(&tic->t_queue, &log->l_writeq); @@ -2688,8 +2692,7 @@ redo: list_del_init(&tic->t_queue); /* we've got enough space */ - xlog_grant_add_space(log, &log->l_grant_write_cycle, - &log->l_grant_write_bytes, need_bytes); + xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_regrant_write_exit(log, tic); xlog_verify_grant_head(log, 1); xlog_verify_grant_tail(log); @@ -2730,12 +2733,10 @@ xlog_regrant_reserve_log_space(xlog_t *log, ticket->t_cnt--; spin_lock(&log->l_grant_lock); - xlog_grant_sub_space(log, &log->l_grant_reserve_cycle, - &log->l_grant_reserve_bytes, - ticket->t_curr_res); - xlog_grant_sub_space(log, &log->l_grant_write_cycle, - &log->l_grant_write_bytes, - ticket->t_curr_res); + xlog_grant_sub_space(log, &log->l_grant_reserve_head, + ticket->t_curr_res); + xlog_grant_sub_space(log, &log->l_grant_write_head, + ticket->t_curr_res); ticket->t_curr_res = ticket->t_unit_res; xlog_tic_reset_res(ticket); @@ -2749,9 +2750,8 @@ xlog_regrant_reserve_log_space(xlog_t *log, return; } - xlog_grant_add_space(log, &log->l_grant_reserve_cycle, - &log->l_grant_reserve_bytes, - ticket->t_unit_res); + xlog_grant_add_space(log, &log->l_grant_reserve_head, + ticket->t_unit_res); trace_xfs_log_regrant_reserve_exit(log, ticket); @@ -2799,10 +2799,8 @@ xlog_ungrant_log_space(xlog_t *log, bytes += ticket->t_unit_res*ticket->t_cnt; } - xlog_grant_sub_space(log, &log->l_grant_reserve_cycle, - &log->l_grant_reserve_bytes, bytes); - xlog_grant_sub_space(log, &log->l_grant_write_cycle, - &log->l_grant_write_bytes, bytes); + xlog_grant_sub_space(log, &log->l_grant_reserve_head, bytes); + xlog_grant_sub_space(log, &log->l_grant_write_head, bytes); trace_xfs_log_ungrant_exit(log, ticket); @@ -3430,22 +3428,31 @@ xlog_verify_dest_ptr( STATIC void xlog_verify_grant_head(xlog_t *log, int equals) { - if (log->l_grant_reserve_cycle == log->l_grant_write_cycle) { - if (equals) - ASSERT(log->l_grant_reserve_bytes >= log->l_grant_write_bytes); - else - ASSERT(log->l_grant_reserve_bytes > log->l_grant_write_bytes); - } else { - ASSERT(log->l_grant_reserve_cycle-1 == log->l_grant_write_cycle); - ASSERT(log->l_grant_write_bytes >= log->l_grant_reserve_bytes); - } -} /* xlog_verify_grant_head */ + int reserve_cycle, reserve_space; + int write_cycle, write_space; + + xlog_crack_grant_head(&log->l_grant_reserve_head, + &reserve_cycle, &reserve_space); + xlog_crack_grant_head(&log->l_grant_write_head, + &write_cycle, &write_space); + + if (reserve_cycle == write_cycle) { + if (equals) + ASSERT(reserve_space >= write_space); + else + ASSERT(reserve_space > write_space); + } else { + ASSERT(reserve_cycle - 1 == write_cycle); + ASSERT(write_space >= reserve_space); + } +} STATIC void xlog_verify_grant_tail( struct log *log) { xfs_lsn_t tail_lsn = log->l_tail_lsn; + int cycle, space; /* * Check to make sure the grant write head didn't just over lap the @@ -3453,9 +3460,10 @@ xlog_verify_grant_tail( * Otherwise, make sure that the cycles differ by exactly one and * check the byte count. */ - if (CYCLE_LSN(tail_lsn) != log->l_grant_write_cycle) { - ASSERT(log->l_grant_write_cycle - 1 == CYCLE_LSN(tail_lsn)); - ASSERT(log->l_grant_write_bytes <= BBTOB(BLOCK_LSN(tail_lsn))); + xlog_crack_grant_head(&log->l_grant_write_head, &cycle, &space); + if (CYCLE_LSN(tail_lsn) != cycle) { + ASSERT(cycle - 1 == CYCLE_LSN(tail_lsn)); + ASSERT(space <= BBTOB(BLOCK_LSN(tail_lsn))); } } diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index a5b3c02..2f74c80 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -518,10 +518,8 @@ typedef struct log { spinlock_t l_grant_lock ____cacheline_aligned_in_smp; struct list_head l_reserveq; struct list_head l_writeq; - int l_grant_reserve_cycle; - int l_grant_reserve_bytes; - int l_grant_write_cycle; - int l_grant_write_bytes; + int64_t l_grant_reserve_head; + int64_t l_grant_write_head; /* The following field are used for debugging; need to hold icloglock */ #ifdef DEBUG @@ -561,6 +559,26 @@ int xlog_write(struct log *log, struct xfs_log_vec *log_vector, xlog_in_core_t **commit_iclog, uint flags); /* + * When we crack the grrant head, we sample it first so that the value will not + * change while we are cracking it into the component values. This means we + * will always get consistent component values to work from. + */ +static inline void +xlog_crack_grant_head(int64_t *head, int *cycle, int *space) +{ + int64_t val = *head; + + *cycle = val >> 32; + *space = val & 0xffffffff; +} + +static inline void +xlog_assign_grant_head(int64_t *head, int cycle, int space) +{ + *head = ((int64_t)cycle << 32) | space; +} + +/* * Committed Item List interfaces */ int xlog_cil_init(struct log *log); diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 4abe7a9..1550404 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -938,10 +938,10 @@ xlog_find_tail( log->l_curr_cycle++; log->l_tail_lsn = be64_to_cpu(rhead->h_tail_lsn); log->l_last_sync_lsn = be64_to_cpu(rhead->h_lsn); - log->l_grant_reserve_cycle = log->l_curr_cycle; - log->l_grant_reserve_bytes = BBTOB(log->l_curr_block); - log->l_grant_write_cycle = log->l_curr_cycle; - log->l_grant_write_bytes = BBTOB(log->l_curr_block); + xlog_assign_grant_head(&log->l_grant_reserve_head, log->l_curr_cycle, + BBTOB(log->l_curr_block)); + xlog_assign_grant_head(&log->l_grant_write_head, log->l_curr_cycle, + BBTOB(log->l_curr_block)); /* * Look for unmount record. If we find it, then we know there -- 1.7.2.3 From SRS0+Brkf+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:42 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.9 required=5.0 tests=BAYES_00,LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7Sgte244994 for ; Tue, 21 Dec 2010 01:28:42 -0600 X-ASG-Debug-ID: 1292916638-165103b20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8C3621CE33D9 for ; Mon, 20 Dec 2010 23:30:38 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id BTjpepplhlLzJR6M for ; Mon, 20 Dec 2010 23:30:38 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50839345-1927428 for ; Tue, 21 Dec 2010 18:00:37 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfx-0001EG-RN for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:25 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfm-0006a8-FV for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:14 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 29/34] xfs: convert l_last_sync_lsn to an atomic variable Subject: [PATCH 29/34] xfs: convert l_last_sync_lsn to an atomic variable Date: Tue, 21 Dec 2010 18:29:25 +1100 Message-Id: <1292916570-25015-30-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292916639 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner log->l_last_sync_lsn is updated in only one critical spot - log buffer Io completion - and is protected by the grant lock here. This requires the grant lock to be taken for every log buffer IO completion. Converting the l_last_sync_lsn variable to an atomic64_t means that we do not need to take the grant lock in log buffer IO completion to update it. This also removes the need for explicitly holding a spinlock to read the l_last_sync_lsn on 32 bit platforms. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_log.c | 55 +++++++++++++++++++++------------------------- fs/xfs/xfs_log_priv.h | 9 ++++++- fs/xfs/xfs_log_recover.c | 6 ++-- 3 files changed, 36 insertions(+), 34 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 1e2020d..70790eb 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -675,12 +675,8 @@ xfs_log_move_tail(xfs_mount_t *mp, if (XLOG_FORCED_SHUTDOWN(log)) return; - if (tail_lsn == 0) { - /* needed since sync_lsn is 64 bits */ - spin_lock(&log->l_icloglock); - tail_lsn = log->l_last_sync_lsn; - spin_unlock(&log->l_icloglock); - } + if (tail_lsn == 0) + tail_lsn = atomic64_read(&log->l_last_sync_lsn); spin_lock(&log->l_grant_lock); @@ -800,11 +796,9 @@ xlog_assign_tail_lsn(xfs_mount_t *mp) tail_lsn = xfs_trans_ail_tail(mp->m_ail); spin_lock(&log->l_grant_lock); - if (tail_lsn != 0) { - log->l_tail_lsn = tail_lsn; - } else { - tail_lsn = log->l_tail_lsn = log->l_last_sync_lsn; - } + if (!tail_lsn) + tail_lsn = atomic64_read(&log->l_last_sync_lsn); + log->l_tail_lsn = tail_lsn; spin_unlock(&log->l_grant_lock); return tail_lsn; @@ -1014,9 +1008,9 @@ xlog_alloc_log(xfs_mount_t *mp, log->l_flags |= XLOG_ACTIVE_RECOVERY; log->l_prev_block = -1; - log->l_tail_lsn = xlog_assign_lsn(1, 0); /* log->l_tail_lsn = 0x100000000LL; cycle = 1; current block = 0 */ - log->l_last_sync_lsn = log->l_tail_lsn; + log->l_tail_lsn = xlog_assign_lsn(1, 0); + atomic64_set(&log->l_last_sync_lsn, xlog_assign_lsn(1, 0)); log->l_curr_cycle = 1; /* 0 is bad since this is initial value */ xlog_assign_grant_head(&log->l_grant_reserve_head, 1, 0); xlog_assign_grant_head(&log->l_grant_write_head, 1, 0); @@ -1194,6 +1188,7 @@ xlog_grant_push_ail( int need_bytes) { xfs_lsn_t threshold_lsn = 0; + xfs_lsn_t last_sync_lsn; xfs_lsn_t tail_lsn; int free_blocks; int free_bytes; @@ -1228,10 +1223,12 @@ xlog_grant_push_ail( threshold_block); /* * Don't pass in an lsn greater than the lsn of the last - * log record known to be on disk. + * log record known to be on disk. Use a snapshot of the last sync lsn + * so that it doesn't change between the compare and the set. */ - if (XFS_LSN_CMP(threshold_lsn, log->l_last_sync_lsn) > 0) - threshold_lsn = log->l_last_sync_lsn; + last_sync_lsn = atomic64_read(&log->l_last_sync_lsn); + if (XFS_LSN_CMP(threshold_lsn, last_sync_lsn) > 0) + threshold_lsn = last_sync_lsn; /* * Get the transaction layer to kick the dirty buffers out to @@ -2194,7 +2191,7 @@ xlog_state_do_callback( lowest_lsn = xlog_get_lowest_lsn(log); if (lowest_lsn && XFS_LSN_CMP(lowest_lsn, - be64_to_cpu(iclog->ic_header.h_lsn)) < 0) { + be64_to_cpu(iclog->ic_header.h_lsn)) < 0) { iclog = iclog->ic_next; continue; /* Leave this iclog for * another thread */ @@ -2202,23 +2199,21 @@ xlog_state_do_callback( iclog->ic_state = XLOG_STATE_CALLBACK; - spin_unlock(&log->l_icloglock); - /* l_last_sync_lsn field protected by - * l_grant_lock. Don't worry about iclog's lsn. - * No one else can be here except us. + /* + * update the last_sync_lsn before we drop the + * icloglock to ensure we are the only one that + * can update it. */ - spin_lock(&log->l_grant_lock); - ASSERT(XFS_LSN_CMP(log->l_last_sync_lsn, - be64_to_cpu(iclog->ic_header.h_lsn)) <= 0); - log->l_last_sync_lsn = - be64_to_cpu(iclog->ic_header.h_lsn); - spin_unlock(&log->l_grant_lock); + ASSERT(XFS_LSN_CMP(atomic64_read(&log->l_last_sync_lsn), + be64_to_cpu(iclog->ic_header.h_lsn)) <= 0); + atomic64_set(&log->l_last_sync_lsn, + be64_to_cpu(iclog->ic_header.h_lsn)); - } else { - spin_unlock(&log->l_icloglock); + } else ioerrors++; - } + + spin_unlock(&log->l_icloglock); /* * Keep processing entries in the callback list until diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index e2bb276..958f356 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -507,7 +507,6 @@ typedef struct log { spinlock_t l_icloglock; /* grab to change iclog state */ xfs_lsn_t l_tail_lsn; /* lsn of 1st LR with unflushed * buffers */ - xfs_lsn_t l_last_sync_lsn;/* lsn of last LR on disk */ int l_curr_cycle; /* Cycle number of log writes */ int l_prev_cycle; /* Cycle number before last * block increment */ @@ -521,6 +520,14 @@ typedef struct log { int64_t l_grant_reserve_head; int64_t l_grant_write_head; + /* + * l_last_sync_lsn is an atomic so it can be set and read without + * needing to hold specific locks. To avoid operations contending with + * other hot objects, place it on a separate cacheline. + */ + /* lsn of last LR on disk */ + atomic64_t l_last_sync_lsn ____cacheline_aligned_in_smp; + /* The following field are used for debugging; need to hold icloglock */ #ifdef DEBUG char *l_iclog_bak[XLOG_MAX_ICLOGS]; diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 1550404..18e1e18 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -937,7 +937,7 @@ xlog_find_tail( if (found == 2) log->l_curr_cycle++; log->l_tail_lsn = be64_to_cpu(rhead->h_tail_lsn); - log->l_last_sync_lsn = be64_to_cpu(rhead->h_lsn); + atomic64_set(&log->l_last_sync_lsn, be64_to_cpu(rhead->h_lsn)); xlog_assign_grant_head(&log->l_grant_reserve_head, log->l_curr_cycle, BBTOB(log->l_curr_block)); xlog_assign_grant_head(&log->l_grant_write_head, log->l_curr_cycle, @@ -989,9 +989,9 @@ xlog_find_tail( log->l_tail_lsn = xlog_assign_lsn(log->l_curr_cycle, after_umount_blk); - log->l_last_sync_lsn = + atomic64_set(&log->l_last_sync_lsn, xlog_assign_lsn(log->l_curr_cycle, - after_umount_blk); + after_umount_blk)); *tail_blk = after_umount_blk; /* -- 1.7.2.3 From SRS0+Brkf+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:36 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SaBB244956 for ; Tue, 21 Dec 2010 01:28:36 -0600 X-ASG-Debug-ID: 1292916632-225f032b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C6B6F1CE33D7 for ; Mon, 20 Dec 2010 23:30:32 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id pGKamhftCvhvENtu for ; Mon, 20 Dec 2010 23:30:32 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50839318-1927428 for ; Tue, 21 Dec 2010 18:00:28 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfc-0001DA-SQ for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:04 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfH-0006ZL-IH for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:43 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 14/34] xfs: fix EFI transaction cancellation. Subject: [PATCH 14/34] xfs: fix EFI transaction cancellation. Date: Tue, 21 Dec 2010 18:29:10 +1100 Message-Id: <1292916570-25015-15-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292916633 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner XFS_EFI_CANCELED has not been set in the code base since xfs_efi_cancel() was removed back in 2006 by commit 065d312e15902976d256ddaf396a7950ec0350a8 ("[XFS] Remove unused iop_abort log item operation), and even then xfs_efi_cancel() was never called. I haven't tracked it back further than that (beyond git history), but it indicates that the handling of EFIs in cancelled transactions has been broken for a long time. Basically, when we get an IOP_UNPIN(lip, 1); call from xfs_trans_uncommit() (i.e. remove == 1), if we don't free the log item descriptor we leak it. Fix the behviour to be correct and kill the XFS_EFI_CANCELED flag. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_extfree_item.c | 20 +++++++++----------- fs/xfs/xfs_extfree_item.h | 1 - 2 files changed, 9 insertions(+), 12 deletions(-) diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c index a55e687..5997efa 100644 --- a/fs/xfs/xfs_extfree_item.c +++ b/fs/xfs/xfs_extfree_item.c @@ -99,10 +99,11 @@ xfs_efi_item_pin( } /* - * While EFIs cannot really be pinned, the unpin operation is the - * last place at which the EFI is manipulated during a transaction. - * Here we coordinate with xfs_efi_cancel() to determine who gets to - * free the EFI. + * While EFIs cannot really be pinned, the unpin operation is the last place at + * which the EFI is manipulated during a transaction. If we are being asked to + * remove the EFI it's because the transaction has been cancelled and by + * definition that means the EFI cannot be in the AIL so remove it from the + * transaction and free it. */ STATIC void xfs_efi_item_unpin( @@ -113,17 +114,14 @@ xfs_efi_item_unpin( struct xfs_ail *ailp = lip->li_ailp; spin_lock(&ailp->xa_lock); - if (efip->efi_flags & XFS_EFI_CANCELED) { - if (remove) - xfs_trans_del_item(lip); - - /* xfs_trans_ail_delete() drops the AIL lock. */ - xfs_trans_ail_delete(ailp, lip); + if (remove) { + ASSERT(!(lip->li_flags & XFS_LI_IN_AIL)); + xfs_trans_del_item(lip); xfs_efi_item_free(efip); } else { efip->efi_flags |= XFS_EFI_COMMITTED; - spin_unlock(&ailp->xa_lock); } + spin_unlock(&ailp->xa_lock); } /* diff --git a/fs/xfs/xfs_extfree_item.h b/fs/xfs/xfs_extfree_item.h index 0d22c56..f7834ec 100644 --- a/fs/xfs/xfs_extfree_item.h +++ b/fs/xfs/xfs_extfree_item.h @@ -115,7 +115,6 @@ typedef struct xfs_efd_log_format_64 { */ #define XFS_EFI_RECOVERED 0x1 #define XFS_EFI_COMMITTED 0x2 -#define XFS_EFI_CANCELED 0x4 /* * This is the "extent free intention" log item. It is used -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:35 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SYre244929 for ; Tue, 21 Dec 2010 01:28:35 -0600 X-ASG-Debug-ID: 1292916628-4a9600000002-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4AF211470328 for ; Mon, 20 Dec 2010 23:30:31 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id uTyZVeVr0bKrU1IG for ; Mon, 20 Dec 2010 23:30:31 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 39223402-1927428 for ; Tue, 21 Dec 2010 18:00:28 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfy-0001EU-4P for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:26 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfm-0006aM-PQ for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:14 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 34/34] xfs: kill useless spinlock_destroy macro Subject: [PATCH 34/34] xfs: kill useless spinlock_destroy macro Date: Tue, 21 Dec 2010 18:29:30 +1100 Message-Id: <1292916570-25015-35-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292916632 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50052 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner It is only used in 2 places in the log code, and is an empty macro, so get rid of it. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_linux.h | 2 -- fs/xfs/xfs_log.c | 2 -- 2 files changed, 0 insertions(+), 4 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_linux.h b/fs/xfs/linux-2.6/xfs_linux.h index ccebd86..e7cfa27 100644 --- a/fs/xfs/linux-2.6/xfs_linux.h +++ b/fs/xfs/linux-2.6/xfs_linux.h @@ -113,8 +113,6 @@ #define current_restore_flags_nested(sp, f) \ (current->flags = ((current->flags & ~(f)) | (*(sp) & (f)))) -#define spinlock_destroy(lock) - #define NBBY 8 /* number of bits per byte */ /* diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 0bf24b1..f94016d 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -1141,7 +1141,6 @@ out_free_iclog: xfs_buf_free(iclog->ic_bp); kmem_free(iclog); } - spinlock_destroy(&log->l_icloglock); xfs_buf_free(log->l_xbuf); out_free_log: kmem_free(log); @@ -1458,7 +1457,6 @@ xlog_dealloc_log(xlog_t *log) kmem_free(iclog); iclog = next_iclog; } - spinlock_destroy(&log->l_icloglock); xfs_buf_free(log->l_xbuf); log->l_mp->m_log = NULL; -- 1.7.2.3 From SRS0+f2mc+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:45 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,SUBJ_TICKET autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7ShOf245012 for ; Tue, 21 Dec 2010 01:28:44 -0600 X-ASG-Debug-ID: 1292916638-31a701dc0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B1C961470332 for ; Mon, 20 Dec 2010 23:30:39 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id VWPh2nynagmkmIDr for ; Mon, 20 Dec 2010 23:30:39 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 39223413-1927428 for ; Tue, 21 Dec 2010 18:00:38 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwg3-0001Ed-1J for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:31 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfm-0006aG-LS for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:14 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 32/34] xfs: introduce new locks for the log grant ticket wait queues Subject: [PATCH 32/34] xfs: introduce new locks for the log grant ticket wait queues Date: Tue, 21 Dec 2010 18:29:28 +1100 Message-Id: <1292916570-25015-33-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1292916640 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50052 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The log grant ticket wait queues are currently protected by the log grant lock. However, the queues are functionally independent from each other, and operations on them only require serialisation against other queue operations now that all of the other log variables they use are atomic values. Hence, we can make them independent of the grant lock by introducing new locks just to protect the lists operations. because the lists are independent, we can use a lock per list and ensure that reserve and write head queuing do not contend. To ensure forced shutdowns work correctly in conjunction with the new fast paths, ensure that we check whether the log has been shut down in the grant functions once we hold the relevant spin locks but before we go to sleep. This is needed to co-ordinate correctly with the wakeups that are issued on the ticket queues so we don't leave any processes sleeping on the queues during a shutdown. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_trace.h | 2 + fs/xfs/xfs_log.c | 139 +++++++++++++++++++++++++----------------- fs/xfs/xfs_log_priv.h | 16 ++++- 3 files changed, 97 insertions(+), 60 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h index b180e1b..647af2a 100644 --- a/fs/xfs/linux-2.6/xfs_trace.h +++ b/fs/xfs/linux-2.6/xfs_trace.h @@ -837,6 +837,7 @@ DEFINE_LOGGRANT_EVENT(xfs_log_grant_sleep1); DEFINE_LOGGRANT_EVENT(xfs_log_grant_wake1); DEFINE_LOGGRANT_EVENT(xfs_log_grant_sleep2); DEFINE_LOGGRANT_EVENT(xfs_log_grant_wake2); +DEFINE_LOGGRANT_EVENT(xfs_log_grant_wake_up); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_enter); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_exit); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_error); @@ -844,6 +845,7 @@ DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_sleep1); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake1); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_sleep2); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake2); +DEFINE_LOGGRANT_EVENT(xfs_log_regrant_write_wake_up); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_enter); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_exit); DEFINE_LOGGRANT_EVENT(xfs_log_regrant_reserve_sub); diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index a1d7d12..6fcc9d0 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -682,12 +682,12 @@ xfs_log_move_tail(xfs_mount_t *mp, if (tail_lsn != 1) atomic64_set(&log->l_tail_lsn, tail_lsn); - spin_lock(&log->l_grant_lock); - if (!list_empty(&log->l_writeq)) { + if (!list_empty_careful(&log->l_writeq)) { #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); #endif + spin_lock(&log->l_grant_write_lock); free_bytes = xlog_space_left(log, &log->l_grant_write_head); list_for_each_entry(tic, &log->l_writeq, t_queue) { ASSERT(tic->t_flags & XLOG_TIC_PERM_RESERV); @@ -696,15 +696,18 @@ xfs_log_move_tail(xfs_mount_t *mp, break; tail_lsn = 0; free_bytes -= tic->t_unit_res; + trace_xfs_log_regrant_write_wake_up(log, tic); wake_up(&tic->t_wait); } + spin_unlock(&log->l_grant_write_lock); } - if (!list_empty(&log->l_reserveq)) { + if (!list_empty_careful(&log->l_reserveq)) { #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) panic("Recovery problem"); #endif + spin_lock(&log->l_grant_reserve_lock); free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); list_for_each_entry(tic, &log->l_reserveq, t_queue) { if (tic->t_flags & XLOG_TIC_PERM_RESERV) @@ -715,11 +718,12 @@ xfs_log_move_tail(xfs_mount_t *mp, break; tail_lsn = 0; free_bytes -= need_bytes; + trace_xfs_log_grant_wake_up(log, tic); wake_up(&tic->t_wait); } + spin_unlock(&log->l_grant_reserve_lock); } - spin_unlock(&log->l_grant_lock); -} /* xfs_log_move_tail */ +} /* * Determine if we have a transaction that has gone to disk @@ -1010,6 +1014,8 @@ xlog_alloc_log(xfs_mount_t *mp, xlog_assign_grant_head(&log->l_grant_write_head, 1, 0); INIT_LIST_HEAD(&log->l_reserveq); INIT_LIST_HEAD(&log->l_writeq); + spin_lock_init(&log->l_grant_reserve_lock); + spin_lock_init(&log->l_grant_write_lock); error = EFSCORRUPTED; if (xfs_sb_version_hassector(&mp->m_sb)) { @@ -2477,6 +2483,18 @@ restart: * * Once a ticket gets put onto the reserveq, it will only return after * the needed reservation is satisfied. + * + * This function is structured so that it has a lock free fast path. This is + * necessary because every new transaction reservation will come through this + * path. Hence any lock will be globally hot if we take it unconditionally on + * every pass. + * + * As tickets are only ever moved on and off the reserveq under the + * l_grant_reserve_lock, we only need to take that lock if we are going + * to add the ticket to the queue and sleep. We can avoid taking the lock if the + * ticket was never added to the reserveq because the t_queue list head will be + * empty and we hold the only reference to it so it can safely be checked + * unlocked. */ STATIC int xlog_grant_log_space(xlog_t *log, @@ -2490,13 +2508,20 @@ xlog_grant_log_space(xlog_t *log, panic("grant Recovery problem"); #endif - /* Is there space or do we need to sleep? */ - spin_lock(&log->l_grant_lock); - trace_xfs_log_grant_enter(log, tic); + need_bytes = tic->t_unit_res; + if (tic->t_flags & XFS_LOG_PERM_RESERV) + need_bytes *= tic->t_ocnt; + /* something is already sleeping; insert new transaction at end */ - if (!list_empty(&log->l_reserveq)) { + if (!list_empty_careful(&log->l_reserveq)) { + spin_lock(&log->l_grant_reserve_lock); + /* recheck the queue now we are locked */ + if (list_empty(&log->l_reserveq)) { + spin_unlock(&log->l_grant_reserve_lock); + goto redo; + } list_add_tail(&tic->t_queue, &log->l_reserveq); trace_xfs_log_grant_sleep1(log, tic); @@ -2509,48 +2534,47 @@ xlog_grant_log_space(xlog_t *log, goto error_return; XFS_STATS_INC(xs_sleep_logspace); - xlog_wait(&tic->t_wait, &log->l_grant_lock); + xlog_wait(&tic->t_wait, &log->l_grant_reserve_lock); /* * If we got an error, and the filesystem is shutting down, * we'll catch it down below. So just continue... */ trace_xfs_log_grant_wake1(log, tic); - spin_lock(&log->l_grant_lock); } - if (tic->t_flags & XFS_LOG_PERM_RESERV) - need_bytes = tic->t_unit_res*tic->t_ocnt; - else - need_bytes = tic->t_unit_res; redo: if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + goto error_return_unlocked; free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); if (free_bytes < need_bytes) { + spin_lock(&log->l_grant_reserve_lock); if (list_empty(&tic->t_queue)) list_add_tail(&tic->t_queue, &log->l_reserveq); trace_xfs_log_grant_sleep2(log, tic); + if (XLOG_FORCED_SHUTDOWN(log)) + goto error_return; + xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); - xlog_wait(&tic->t_wait, &log->l_grant_lock); - - spin_lock(&log->l_grant_lock); - if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + xlog_wait(&tic->t_wait, &log->l_grant_reserve_lock); trace_xfs_log_grant_wake2(log, tic); - goto redo; } - list_del_init(&tic->t_queue); + if (!list_empty(&tic->t_queue)) { + spin_lock(&log->l_grant_reserve_lock); + list_del_init(&tic->t_queue); + spin_unlock(&log->l_grant_reserve_lock); + } /* we've got enough space */ + spin_lock(&log->l_grant_lock); xlog_grant_add_space(log, &log->l_grant_reserve_head, need_bytes); xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_grant_exit(log, tic); @@ -2559,8 +2583,11 @@ redo: spin_unlock(&log->l_grant_lock); return 0; - error_return: +error_return_unlocked: + spin_lock(&log->l_grant_reserve_lock); +error_return: list_del_init(&tic->t_queue); + spin_unlock(&log->l_grant_reserve_lock); trace_xfs_log_grant_error(log, tic); /* @@ -2570,7 +2597,6 @@ redo: */ tic->t_curr_res = 0; tic->t_cnt = 0; /* ungrant will give back unit_res * t_cnt. */ - spin_unlock(&log->l_grant_lock); return XFS_ERROR(EIO); } /* xlog_grant_log_space */ @@ -2578,7 +2604,8 @@ redo: /* * Replenish the byte reservation required by moving the grant write head. * - * + * Similar to xlog_grant_log_space, the function is structured to have a lock + * free fast path. */ STATIC int xlog_regrant_write_log_space(xlog_t *log, @@ -2597,12 +2624,9 @@ xlog_regrant_write_log_space(xlog_t *log, panic("regrant Recovery problem"); #endif - spin_lock(&log->l_grant_lock); - trace_xfs_log_regrant_write_enter(log, tic); - if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + goto error_return_unlocked; /* If there are other waiters on the queue then give them a * chance at logspace before us. Wake up the first waiters, @@ -2611,8 +2635,10 @@ xlog_regrant_write_log_space(xlog_t *log, * this transaction. */ need_bytes = tic->t_unit_res; - if (!list_empty(&log->l_writeq)) { + if (!list_empty_careful(&log->l_writeq)) { struct xlog_ticket *ntic; + + spin_lock(&log->l_grant_write_lock); free_bytes = xlog_space_left(log, &log->l_grant_write_head); list_for_each_entry(ntic, &log->l_writeq, t_queue) { ASSERT(ntic->t_flags & XLOG_TIC_PERM_RESERV); @@ -2627,50 +2653,48 @@ xlog_regrant_write_log_space(xlog_t *log, struct xlog_ticket, t_queue)) { if (list_empty(&tic->t_queue)) list_add_tail(&tic->t_queue, &log->l_writeq); - trace_xfs_log_regrant_write_sleep1(log, tic); xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); - xlog_wait(&tic->t_wait, &log->l_grant_lock); - - /* If we're shutting down, this tic is already - * off the queue */ - spin_lock(&log->l_grant_lock); - if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; - + xlog_wait(&tic->t_wait, &log->l_grant_write_lock); trace_xfs_log_regrant_write_wake1(log, tic); - } + } else + spin_unlock(&log->l_grant_write_lock); } redo: if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + goto error_return_unlocked; free_bytes = xlog_space_left(log, &log->l_grant_write_head); if (free_bytes < need_bytes) { + spin_lock(&log->l_grant_write_lock); if (list_empty(&tic->t_queue)) list_add_tail(&tic->t_queue, &log->l_writeq); + + if (XLOG_FORCED_SHUTDOWN(log)) + goto error_return; + xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); trace_xfs_log_regrant_write_sleep2(log, tic); - xlog_wait(&tic->t_wait, &log->l_grant_lock); - - /* If we're shutting down, this tic is already off the queue */ - spin_lock(&log->l_grant_lock); - if (XLOG_FORCED_SHUTDOWN(log)) - goto error_return; + xlog_wait(&tic->t_wait, &log->l_grant_write_lock); trace_xfs_log_regrant_write_wake2(log, tic); goto redo; } - list_del_init(&tic->t_queue); + if (!list_empty(&tic->t_queue)) { + spin_lock(&log->l_grant_write_lock); + list_del_init(&tic->t_queue); + spin_unlock(&log->l_grant_write_lock); + } /* we've got enough space */ + spin_lock(&log->l_grant_lock); xlog_grant_add_space(log, &log->l_grant_write_head, need_bytes); trace_xfs_log_regrant_write_exit(log, tic); xlog_verify_grant_head(log, 1); @@ -2679,8 +2703,11 @@ redo: return 0; + error_return_unlocked: + spin_lock(&log->l_grant_write_lock); error_return: list_del_init(&tic->t_queue); + spin_unlock(&log->l_grant_write_lock); trace_xfs_log_regrant_write_error(log, tic); /* @@ -2690,7 +2717,6 @@ redo: */ tic->t_curr_res = 0; tic->t_cnt = 0; /* ungrant will give back unit_res * t_cnt. */ - spin_unlock(&log->l_grant_lock); return XFS_ERROR(EIO); } /* xlog_regrant_write_log_space */ @@ -3664,12 +3690,10 @@ xfs_log_force_umount( xlog_cil_force(log); /* - * We must hold both the GRANT lock and the LOG lock, - * before we mark the filesystem SHUTDOWN and wake - * everybody up to tell the bad news. + * mark the filesystem and the as in a shutdown state and wake + * everybody up to tell them the bad news. */ spin_lock(&log->l_icloglock); - spin_lock(&log->l_grant_lock); mp->m_flags |= XFS_MOUNT_FS_SHUTDOWN; if (mp->m_sb_bp) XFS_BUF_DONE(mp->m_sb_bp); @@ -3694,14 +3718,17 @@ xfs_log_force_umount( * means we have to wake up everybody queued up on reserveq as well as * writeq. In addition, we make sure in xlog_{re}grant_log_space that * we don't enqueue anything once the SHUTDOWN flag is set, and this - * action is protected by the GRANTLOCK. + * action is protected by the grant locks. */ + spin_lock(&log->l_grant_reserve_lock); list_for_each_entry(tic, &log->l_reserveq, t_queue) wake_up(&tic->t_wait); + spin_unlock(&log->l_grant_reserve_lock); + spin_lock(&log->l_grant_write_lock); list_for_each_entry(tic, &log->l_writeq, t_queue) wake_up(&tic->t_wait); - spin_unlock(&log->l_grant_lock); + spin_unlock(&log->l_grant_write_lock); if (!(log->l_iclog->ic_state & XLOG_STATE_IOERROR)) { ASSERT(!logerror); diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 7619d6a..befb2fc 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -512,10 +512,6 @@ typedef struct log { /* The following block of fields are changed while holding grant_lock */ spinlock_t l_grant_lock ____cacheline_aligned_in_smp; - struct list_head l_reserveq; - struct list_head l_writeq; - atomic64_t l_grant_reserve_head; - atomic64_t l_grant_write_head; /* * l_last_sync_lsn and l_tail_lsn are atomics so they can be set and @@ -528,6 +524,18 @@ typedef struct log { /* lsn of 1st LR with unflushed * buffers */ atomic64_t l_tail_lsn ____cacheline_aligned_in_smp; + /* + * ticket grant locks, queues and accounting have their own cachlines + * as these are quite hot and can be operated on concurrently. + */ + spinlock_t l_grant_reserve_lock ____cacheline_aligned_in_smp; + struct list_head l_reserveq; + atomic64_t l_grant_reserve_head; + + spinlock_t l_grant_write_lock ____cacheline_aligned_in_smp; + struct list_head l_writeq; + atomic64_t l_grant_write_head; + /* The following field are used for debugging; need to hold icloglock */ #ifdef DEBUG char *l_iclog_bak[XLOG_MAX_ICLOGS]; -- 1.7.2.3 From SRS0+K7iM+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:44 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_65, LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7SgUQ244998 for ; Tue, 21 Dec 2010 01:28:43 -0600 X-ASG-Debug-ID: 1292916638-40d600b90000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E1CB71470330 for ; Mon, 20 Dec 2010 23:30:38 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id TqxVfw06OEexU1sk for ; Mon, 20 Dec 2010 23:30:38 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 5388626-1927428 for ; Tue, 21 Dec 2010 18:00:37 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfx-0001EH-TG for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:25 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfm-0006aA-Hq for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:14 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 30/34] xfs: convert l_tail_lsn to an atomic variable. Subject: [PATCH 30/34] xfs: convert l_tail_lsn to an atomic variable. Date: Tue, 21 Dec 2010 18:29:26 +1100 Message-Id: <1292916570-25015-31-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292916639 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50052 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner log->l_tail_lsn is currently protected by the log grant lock. The lock is only needed for serialising readers against writers, so we don't really need the lock if we make the l_tail_lsn variable an atomic. Converting the l_tail_lsn variable to an atomic64_t means we can start to peel back the grant lock from various operations. Also, provide functions to safely crack an atomic LSN variable into it's component pieces and to recombined the components into an atomic variable. Use them where appropriate. This also removes the need for explicitly holding a spinlock to read the l_tail_lsn on 32 bit platforms. Signed-off-by: Dave Chinner --- fs/xfs/linux-2.6/xfs_trace.h | 2 +- fs/xfs/xfs_log.c | 56 ++++++++++++++++++----------------------- fs/xfs/xfs_log_priv.h | 37 +++++++++++++++++++++++---- fs/xfs/xfs_log_recover.c | 14 ++++------ 4 files changed, 63 insertions(+), 46 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_trace.h b/fs/xfs/linux-2.6/xfs_trace.h index 3ff6b35..b180e1b 100644 --- a/fs/xfs/linux-2.6/xfs_trace.h +++ b/fs/xfs/linux-2.6/xfs_trace.h @@ -794,7 +794,7 @@ DECLARE_EVENT_CLASS(xfs_loggrant_class, &__entry->grant_write_bytes); __entry->curr_cycle = log->l_curr_cycle; __entry->curr_block = log->l_curr_block; - __entry->tail_lsn = log->l_tail_lsn; + __entry->tail_lsn = atomic64_read(&log->l_tail_lsn); ), TP_printk("dev %d:%d type %s t_ocnt %u t_cnt %u t_curr_res %u " "t_unit_res %u t_flags %s reserveq %s " diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index 70790eb..d118bf8 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -678,15 +678,11 @@ xfs_log_move_tail(xfs_mount_t *mp, if (tail_lsn == 0) tail_lsn = atomic64_read(&log->l_last_sync_lsn); - spin_lock(&log->l_grant_lock); - - /* Also an invalid lsn. 1 implies that we aren't passing in a valid - * tail_lsn. - */ - if (tail_lsn != 1) { - log->l_tail_lsn = tail_lsn; - } + /* tail_lsn == 1 implies that we weren't passed a valid value. */ + if (tail_lsn != 1) + atomic64_set(&log->l_tail_lsn, tail_lsn); + spin_lock(&log->l_grant_lock); if (!list_empty(&log->l_writeq)) { #ifdef DEBUG if (log->l_flags & XLOG_ACTIVE_RECOVERY) @@ -789,21 +785,19 @@ xfs_log_need_covered(xfs_mount_t *mp) * We may be holding the log iclog lock upon entering this routine. */ xfs_lsn_t -xlog_assign_tail_lsn(xfs_mount_t *mp) +xlog_assign_tail_lsn( + struct xfs_mount *mp) { - xfs_lsn_t tail_lsn; - xlog_t *log = mp->m_log; + xfs_lsn_t tail_lsn; + struct log *log = mp->m_log; tail_lsn = xfs_trans_ail_tail(mp->m_ail); - spin_lock(&log->l_grant_lock); if (!tail_lsn) tail_lsn = atomic64_read(&log->l_last_sync_lsn); - log->l_tail_lsn = tail_lsn; - spin_unlock(&log->l_grant_lock); + atomic64_set(&log->l_tail_lsn, tail_lsn); return tail_lsn; -} /* xlog_assign_tail_lsn */ - +} /* * Return the space in the log between the tail and the head. The head @@ -831,8 +825,8 @@ xlog_space_left( int head_bytes; xlog_crack_grant_head(head, &head_cycle, &head_bytes); - tail_bytes = BBTOB(BLOCK_LSN(log->l_tail_lsn)); - tail_cycle = CYCLE_LSN(log->l_tail_lsn); + xlog_crack_atomic_lsn(&log->l_tail_lsn, &tail_cycle, &tail_bytes); + tail_bytes = BBTOB(tail_bytes); if (tail_cycle == head_cycle && head_bytes >= tail_bytes) free_bytes = log->l_logsize - (head_bytes - tail_bytes); else if (tail_cycle + 1 < head_cycle) @@ -1009,8 +1003,8 @@ xlog_alloc_log(xfs_mount_t *mp, log->l_prev_block = -1; /* log->l_tail_lsn = 0x100000000LL; cycle = 1; current block = 0 */ - log->l_tail_lsn = xlog_assign_lsn(1, 0); - atomic64_set(&log->l_last_sync_lsn, xlog_assign_lsn(1, 0)); + xlog_assign_atomic_lsn(&log->l_tail_lsn, 1, 0); + xlog_assign_atomic_lsn(&log->l_last_sync_lsn, 1, 0); log->l_curr_cycle = 1; /* 0 is bad since this is initial value */ xlog_assign_grant_head(&log->l_grant_reserve_head, 1, 0); xlog_assign_grant_head(&log->l_grant_write_head, 1, 0); @@ -1189,7 +1183,6 @@ xlog_grant_push_ail( { xfs_lsn_t threshold_lsn = 0; xfs_lsn_t last_sync_lsn; - xfs_lsn_t tail_lsn; int free_blocks; int free_bytes; int threshold_block; @@ -1198,7 +1191,6 @@ xlog_grant_push_ail( ASSERT(BTOBB(need_bytes) < log->l_logBBsize); - tail_lsn = log->l_tail_lsn; free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); free_blocks = BTOBBT(free_bytes); @@ -1213,8 +1205,9 @@ xlog_grant_push_ail( if (free_blocks >= free_threshold) return; - threshold_block = BLOCK_LSN(tail_lsn) + free_threshold; - threshold_cycle = CYCLE_LSN(tail_lsn); + xlog_crack_atomic_lsn(&log->l_tail_lsn, &threshold_cycle, + &threshold_block); + threshold_block += free_threshold; if (threshold_block >= log->l_logBBsize) { threshold_block -= log->l_logBBsize; threshold_cycle += 1; @@ -2828,11 +2821,11 @@ xlog_state_release_iclog( if (iclog->ic_state == XLOG_STATE_WANT_SYNC) { /* update tail before writing to iclog */ - xlog_assign_tail_lsn(log->l_mp); + xfs_lsn_t tail_lsn = xlog_assign_tail_lsn(log->l_mp); sync++; iclog->ic_state = XLOG_STATE_SYNCING; - iclog->ic_header.h_tail_lsn = cpu_to_be64(log->l_tail_lsn); - xlog_verify_tail_lsn(log, iclog, log->l_tail_lsn); + iclog->ic_header.h_tail_lsn = cpu_to_be64(tail_lsn); + xlog_verify_tail_lsn(log, iclog, tail_lsn); /* cycle incremented when incrementing curr_block */ } spin_unlock(&log->l_icloglock); @@ -3435,7 +3428,7 @@ STATIC void xlog_verify_grant_tail( struct log *log) { - xfs_lsn_t tail_lsn = log->l_tail_lsn; + int tail_cycle, tail_blocks; int cycle, space; /* @@ -3445,9 +3438,10 @@ xlog_verify_grant_tail( * check the byte count. */ xlog_crack_grant_head(&log->l_grant_write_head, &cycle, &space); - if (CYCLE_LSN(tail_lsn) != cycle) { - ASSERT(cycle - 1 == CYCLE_LSN(tail_lsn)); - ASSERT(space <= BBTOB(BLOCK_LSN(tail_lsn))); + xlog_crack_atomic_lsn(&log->l_tail_lsn, &tail_cycle, &tail_blocks); + if (tail_cycle != cycle) { + ASSERT(cycle - 1 == tail_cycle); + ASSERT(space <= BBTOB(tail_blocks)); } } diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index 958f356..d34af1c 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -53,7 +53,6 @@ struct xfs_mount; BTOBB(XLOG_MAX_ICLOGS << (xfs_sb_version_haslogv2(&log->l_mp->m_sb) ? \ XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT)) - static inline xfs_lsn_t xlog_assign_lsn(uint cycle, uint block) { return ((xfs_lsn_t)cycle << 32) | block; @@ -505,8 +504,6 @@ typedef struct log { * log entries" */ xlog_in_core_t *l_iclog; /* head log queue */ spinlock_t l_icloglock; /* grab to change iclog state */ - xfs_lsn_t l_tail_lsn; /* lsn of 1st LR with unflushed - * buffers */ int l_curr_cycle; /* Cycle number of log writes */ int l_prev_cycle; /* Cycle number before last * block increment */ @@ -521,12 +518,15 @@ typedef struct log { int64_t l_grant_write_head; /* - * l_last_sync_lsn is an atomic so it can be set and read without - * needing to hold specific locks. To avoid operations contending with - * other hot objects, place it on a separate cacheline. + * l_last_sync_lsn and l_tail_lsn are atomics so they can be set and + * read without needing to hold specific locks. To avoid operations + * contending with other hot objects, place each of them on a separate + * cacheline. */ /* lsn of last LR on disk */ atomic64_t l_last_sync_lsn ____cacheline_aligned_in_smp; + /* lsn of 1st LR with unflushed * buffers */ + atomic64_t l_tail_lsn ____cacheline_aligned_in_smp; /* The following field are used for debugging; need to hold icloglock */ #ifdef DEBUG @@ -566,6 +566,31 @@ int xlog_write(struct log *log, struct xfs_log_vec *log_vector, xlog_in_core_t **commit_iclog, uint flags); /* + * When we crack an atomic LSN, we sample it first so that the value will not + * change while we are cracking it into the component values. This means we + * will always get consistent component values to work from. This should always + * be used to smaple and crack LSNs taht are stored and updated in atomic + * variables. + */ +static inline void +xlog_crack_atomic_lsn(atomic64_t *lsn, uint *cycle, uint *block) +{ + xfs_lsn_t val = atomic64_read(lsn); + + *cycle = CYCLE_LSN(val); + *block = BLOCK_LSN(val); +} + +/* + * Calculate and assign a value to an atomic LSN variable from component pieces. + */ +static inline void +xlog_assign_atomic_lsn(atomic64_t *lsn, uint cycle, uint block) +{ + atomic64_set(lsn, xlog_assign_lsn(cycle, block)); +} + +/* * When we crack the grrant head, we sample it first so that the value will not * change while we are cracking it into the component values. This means we * will always get consistent component values to work from. diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c index 18e1e18..204d8e5 100644 --- a/fs/xfs/xfs_log_recover.c +++ b/fs/xfs/xfs_log_recover.c @@ -936,7 +936,7 @@ xlog_find_tail( log->l_curr_cycle = be32_to_cpu(rhead->h_cycle); if (found == 2) log->l_curr_cycle++; - log->l_tail_lsn = be64_to_cpu(rhead->h_tail_lsn); + atomic64_set(&log->l_tail_lsn, be64_to_cpu(rhead->h_tail_lsn)); atomic64_set(&log->l_last_sync_lsn, be64_to_cpu(rhead->h_lsn)); xlog_assign_grant_head(&log->l_grant_reserve_head, log->l_curr_cycle, BBTOB(log->l_curr_block)); @@ -971,7 +971,7 @@ xlog_find_tail( } after_umount_blk = (i + hblks + (int) BTOBB(be32_to_cpu(rhead->h_len))) % log->l_logBBsize; - tail_lsn = log->l_tail_lsn; + tail_lsn = atomic64_read(&log->l_tail_lsn); if (*head_blk == after_umount_blk && be32_to_cpu(rhead->h_num_logops) == 1) { umount_data_blk = (i + hblks) % log->l_logBBsize; @@ -986,12 +986,10 @@ xlog_find_tail( * log records will point recovery to after the * current unmount record. */ - log->l_tail_lsn = - xlog_assign_lsn(log->l_curr_cycle, - after_umount_blk); - atomic64_set(&log->l_last_sync_lsn, - xlog_assign_lsn(log->l_curr_cycle, - after_umount_blk)); + xlog_assign_atomic_lsn(&log->l_tail_lsn, + log->l_curr_cycle, after_umount_blk); + xlog_assign_atomic_lsn(&log->l_last_sync_lsn, + log->l_curr_cycle, after_umount_blk); *tail_blk = after_umount_blk; /* -- 1.7.2.3 From SRS0+Brkf+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:37 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7Sbeo244960 for ; Tue, 21 Dec 2010 01:28:37 -0600 X-ASG-Debug-ID: 1292916632-25d303bb0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 964F7212035 for ; Mon, 20 Dec 2010 23:30:33 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id dFN8aAPtqcxZwCCM for ; Mon, 20 Dec 2010 23:30:33 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50839323-1927428 for ; Tue, 21 Dec 2010 18:00:32 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfd-0001DO-4o for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:05 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfR-0006ZY-Px for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:29:53 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 18/34] xfs: reduce the number of AIL push wakeups Subject: [PATCH 18/34] xfs: reduce the number of AIL push wakeups Date: Tue, 21 Dec 2010 18:29:14 +1100 Message-Id: <1292916570-25015-19-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292916634 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The xfaild often tries to rest to wait for congestion to pass of for IO to complete, but is regularly woken in tail-pushing situations. In severe cases, the xfsaild is getting woken tens of thousands of times a second. Reduce the number needless wakeups by only waking the xfsaild if the new target is larger than the old one. Further make short sleeps uninterruptible as they occur when the xfsaild has decided it needs to back off to allow some IO to complete and being woken early is counter-productive. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/linux-2.6/xfs_super.c | 20 ++++++++++++++++---- 1 files changed, 16 insertions(+), 4 deletions(-) diff --git a/fs/xfs/linux-2.6/xfs_super.c b/fs/xfs/linux-2.6/xfs_super.c index abcda07..6a12da3 100644 --- a/fs/xfs/linux-2.6/xfs_super.c +++ b/fs/xfs/linux-2.6/xfs_super.c @@ -834,8 +834,11 @@ xfsaild_wakeup( struct xfs_ail *ailp, xfs_lsn_t threshold_lsn) { - ailp->xa_target = threshold_lsn; - wake_up_process(ailp->xa_task); + /* only ever move the target forwards */ + if (XFS_LSN_CMP(threshold_lsn, ailp->xa_target) > 0) { + ailp->xa_target = threshold_lsn; + wake_up_process(ailp->xa_task); + } } STATIC int @@ -847,8 +850,17 @@ xfsaild( long tout = 0; /* milliseconds */ while (!kthread_should_stop()) { - schedule_timeout_interruptible(tout ? - msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT); + /* + * for short sleeps indicating congestion, don't allow us to + * get woken early. Otherwise all we do is bang on the AIL lock + * without making progress. + */ + if (tout && tout <= 20) + __set_current_state(TASK_KILLABLE); + else + __set_current_state(TASK_INTERRUPTIBLE); + schedule_timeout(tout ? + msecs_to_jiffies(tout) : MAX_SCHEDULE_TIMEOUT); /* swsusp */ try_to_freeze(); -- 1.7.2.3 From SRS0+Brkf+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:43 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7ShAa245000 for ; Tue, 21 Dec 2010 01:28:43 -0600 X-ASG-Debug-ID: 1292916638-1efa03370000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 542081CE33DD for ; Mon, 20 Dec 2010 23:30:39 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id CmkzloHfFL5pAySt for ; Mon, 20 Dec 2010 23:30:39 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50839347-1927428 for ; Tue, 21 Dec 2010 18:00:38 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfx-0001EK-Us for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:25 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfm-0006aD-Ja for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:14 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 31/34] xfs: convert log grant heads to atomic variables Subject: [PATCH 31/34] xfs: convert log grant heads to atomic variables Date: Tue, 21 Dec 2010 18:29:27 +1100 Message-Id: <1292916570-25015-32-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292916640 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Convert the log grant heads to atomic64_t types in preparation for converting the accounting algorithms to atomic operations. his patch just converts the variables; the algorithmic changes are in a separate patch for clarity. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_log.c | 8 ++++---- fs/xfs/xfs_log_priv.h | 12 ++++++------ 2 files changed, 10 insertions(+), 10 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index d118bf8..a1d7d12 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -47,7 +47,7 @@ STATIC xlog_t * xlog_alloc_log(xfs_mount_t *mp, xfs_buftarg_t *log_target, xfs_daddr_t blk_offset, int num_bblks); -STATIC int xlog_space_left(struct log *log, int64_t *head); +STATIC int xlog_space_left(struct log *log, atomic64_t *head); STATIC int xlog_sync(xlog_t *log, xlog_in_core_t *iclog); STATIC void xlog_dealloc_log(xlog_t *log); @@ -100,7 +100,7 @@ STATIC int xlog_iclogs_empty(xlog_t *log); static void xlog_grant_sub_space( struct log *log, - int64_t *head, + atomic64_t *head, int bytes) { int cycle, space; @@ -119,7 +119,7 @@ xlog_grant_sub_space( static void xlog_grant_add_space( struct log *log, - int64_t *head, + atomic64_t *head, int bytes) { int tmp; @@ -816,7 +816,7 @@ xlog_assign_tail_lsn( STATIC int xlog_space_left( struct log *log, - int64_t *head) + atomic64_t *head) { int free_bytes; int tail_bytes; diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h index d34af1c..7619d6a 100644 --- a/fs/xfs/xfs_log_priv.h +++ b/fs/xfs/xfs_log_priv.h @@ -514,8 +514,8 @@ typedef struct log { spinlock_t l_grant_lock ____cacheline_aligned_in_smp; struct list_head l_reserveq; struct list_head l_writeq; - int64_t l_grant_reserve_head; - int64_t l_grant_write_head; + atomic64_t l_grant_reserve_head; + atomic64_t l_grant_write_head; /* * l_last_sync_lsn and l_tail_lsn are atomics so they can be set and @@ -596,18 +596,18 @@ xlog_assign_atomic_lsn(atomic64_t *lsn, uint cycle, uint block) * will always get consistent component values to work from. */ static inline void -xlog_crack_grant_head(int64_t *head, int *cycle, int *space) +xlog_crack_grant_head(atomic64_t *head, int *cycle, int *space) { - int64_t val = *head; + int64_t val = atomic64_read(head); *cycle = val >> 32; *space = val & 0xffffffff; } static inline void -xlog_assign_grant_head(int64_t *head, int cycle, int space) +xlog_assign_grant_head(atomic64_t *head, int cycle, int space) { - *head = ((int64_t)cycle << 32) | space; + atomic64_set(head, ((int64_t)cycle << 32) | space); } /* -- 1.7.2.3 From SRS0+CBlE+24+fromorbit.com=dave@internode.on.net Tue Dec 21 01:28:43 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL7Sgwv244997 for ; Tue, 21 Dec 2010 01:28:43 -0600 X-ASG-Debug-ID: 1292916638-35e5024b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 20A3A21203C for ; Mon, 20 Dec 2010 23:30:39 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id 4Sk7cbEWUm8f9y95 for ; Mon, 20 Dec 2010 23:30:39 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50434469-1927428 for ; Tue, 21 Dec 2010 18:00:38 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUwfx-0001EF-Pl for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:25 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUwfm-0006a0-Da for xfs@oss.sgi.com; Tue, 21 Dec 2010 18:30:14 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH 28/34] xfs: make AIL tail pushing independent of the grant lock Subject: [PATCH 28/34] xfs: make AIL tail pushing independent of the grant lock Date: Tue, 21 Dec 2010 18:29:24 +1100 Message-Id: <1292916570-25015-29-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1292916640 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50053 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner The xlog_grant_push_ail() currently takes the grant lock internally to sample the tail lsn, last sync lsn and the reserve grant head. Most of the callers already hold the grant lock but have to drop it before calling xlog_grant_push_ail(). This is a left over from when the AIL tail pushing was done in line and hence xlog_grant_push_ail had to drop the grant lock. AIL push is now done in another thread and hence we can safely hold the grant lock over the entire xlog_grant_push_ail call. Push the grant lock outside of xlog_grant_push_ail() to simplify the locking and synchronisation needed for tail pushing. This will reduce traffic on the grant lock by itself, but this is only one step in preparing for the complete removal of the grant lock. While there, clean up the formatting of xlog_grant_push_ail() to match the rest of the XFS code. Signed-off-by: Dave Chinner Reviewed-by: Christoph Hellwig --- fs/xfs/xfs_log.c | 111 ++++++++++++++++++++++++++--------------------------- 1 files changed, 54 insertions(+), 57 deletions(-) diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c index cc0504e..1e2020d 100644 --- a/fs/xfs/xfs_log.c +++ b/fs/xfs/xfs_log.c @@ -70,7 +70,7 @@ STATIC void xlog_state_want_sync(xlog_t *log, xlog_in_core_t *iclog); /* local functions to manipulate grant head */ STATIC int xlog_grant_log_space(xlog_t *log, xlog_ticket_t *xtic); -STATIC void xlog_grant_push_ail(xfs_mount_t *mp, +STATIC void xlog_grant_push_ail(struct log *log, int need_bytes); STATIC void xlog_regrant_reserve_log_space(xlog_t *log, xlog_ticket_t *ticket); @@ -318,7 +318,9 @@ xfs_log_reserve( trace_xfs_log_reserve(log, internal_ticket); - xlog_grant_push_ail(mp, internal_ticket->t_unit_res); + spin_lock(&log->l_grant_lock); + xlog_grant_push_ail(log, internal_ticket->t_unit_res); + spin_unlock(&log->l_grant_lock); retval = xlog_regrant_write_log_space(log, internal_ticket); } else { /* may sleep if need to allocate more tickets */ @@ -332,9 +334,11 @@ xfs_log_reserve( trace_xfs_log_reserve(log, internal_ticket); - xlog_grant_push_ail(mp, + spin_lock(&log->l_grant_lock); + xlog_grant_push_ail(log, (internal_ticket->t_unit_res * internal_ticket->t_cnt)); + spin_unlock(&log->l_grant_lock); retval = xlog_grant_log_space(log, internal_ticket); } @@ -1185,59 +1189,58 @@ xlog_commit_record( * water mark. In this manner, we would be creating a low water mark. */ STATIC void -xlog_grant_push_ail(xfs_mount_t *mp, - int need_bytes) +xlog_grant_push_ail( + struct log *log, + int need_bytes) { - xlog_t *log = mp->m_log; /* pointer to the log */ - xfs_lsn_t tail_lsn; /* lsn of the log tail */ - xfs_lsn_t threshold_lsn = 0; /* lsn we'd like to be at */ - int free_blocks; /* free blocks left to write to */ - int free_bytes; /* free bytes left to write to */ - int threshold_block; /* block in lsn we'd like to be at */ - int threshold_cycle; /* lsn cycle we'd like to be at */ - int free_threshold; - - ASSERT(BTOBB(need_bytes) < log->l_logBBsize); - - spin_lock(&log->l_grant_lock); - free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); - tail_lsn = log->l_tail_lsn; - free_blocks = BTOBBT(free_bytes); - - /* - * Set the threshold for the minimum number of free blocks in the - * log to the maximum of what the caller needs, one quarter of the - * log, and 256 blocks. - */ - free_threshold = BTOBB(need_bytes); - free_threshold = MAX(free_threshold, (log->l_logBBsize >> 2)); - free_threshold = MAX(free_threshold, 256); - if (free_blocks < free_threshold) { + xfs_lsn_t threshold_lsn = 0; + xfs_lsn_t tail_lsn; + int free_blocks; + int free_bytes; + int threshold_block; + int threshold_cycle; + int free_threshold; + + ASSERT(BTOBB(need_bytes) < log->l_logBBsize); + + tail_lsn = log->l_tail_lsn; + free_bytes = xlog_space_left(log, &log->l_grant_reserve_head); + free_blocks = BTOBBT(free_bytes); + + /* + * Set the threshold for the minimum number of free blocks in the + * log to the maximum of what the caller needs, one quarter of the + * log, and 256 blocks. + */ + free_threshold = BTOBB(need_bytes); + free_threshold = MAX(free_threshold, (log->l_logBBsize >> 2)); + free_threshold = MAX(free_threshold, 256); + if (free_blocks >= free_threshold) + return; + threshold_block = BLOCK_LSN(tail_lsn) + free_threshold; threshold_cycle = CYCLE_LSN(tail_lsn); if (threshold_block >= log->l_logBBsize) { - threshold_block -= log->l_logBBsize; - threshold_cycle += 1; + threshold_block -= log->l_logBBsize; + threshold_cycle += 1; } - threshold_lsn = xlog_assign_lsn(threshold_cycle, threshold_block); - - /* Don't pass in an lsn greater than the lsn of the last + threshold_lsn = xlog_assign_lsn(threshold_cycle, + threshold_block); + /* + * Don't pass in an lsn greater than the lsn of the last * log record known to be on disk. */ if (XFS_LSN_CMP(threshold_lsn, log->l_last_sync_lsn) > 0) - threshold_lsn = log->l_last_sync_lsn; - } - spin_unlock(&log->l_grant_lock); - - /* - * Get the transaction layer to kick the dirty buffers out to - * disk asynchronously. No point in trying to do this if - * the filesystem is shutting down. - */ - if (threshold_lsn && - !XLOG_FORCED_SHUTDOWN(log)) - xfs_trans_ail_push(log->l_ailp, threshold_lsn); -} /* xlog_grant_push_ail */ + threshold_lsn = log->l_last_sync_lsn; + + /* + * Get the transaction layer to kick the dirty buffers out to + * disk asynchronously. No point in trying to do this if + * the filesystem is shutting down. + */ + if (!XLOG_FORCED_SHUTDOWN(log)) + xfs_trans_ail_push(log->l_ailp, threshold_lsn); +} /* * The bdstrat callback function for log bufs. This gives us a central @@ -2543,9 +2546,7 @@ redo: trace_xfs_log_grant_sleep2(log, tic); - spin_unlock(&log->l_grant_lock); - xlog_grant_push_ail(log->l_mp, need_bytes); - spin_lock(&log->l_grant_lock); + xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); xlog_wait(&tic->t_wait, &log->l_grant_lock); @@ -2641,9 +2642,7 @@ xlog_regrant_write_log_space(xlog_t *log, trace_xfs_log_regrant_write_sleep1(log, tic); - spin_unlock(&log->l_grant_lock); - xlog_grant_push_ail(log->l_mp, need_bytes); - spin_lock(&log->l_grant_lock); + xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); xlog_wait(&tic->t_wait, &log->l_grant_lock); @@ -2666,9 +2665,7 @@ redo: if (free_bytes < need_bytes) { if (list_empty(&tic->t_queue)) list_add_tail(&tic->t_queue, &log->l_writeq); - spin_unlock(&log->l_grant_lock); - xlog_grant_push_ail(log->l_mp, need_bytes); - spin_lock(&log->l_grant_lock); + xlog_grant_push_ail(log, need_bytes); XFS_STATS_INC(xs_sleep_logspace); trace_xfs_log_regrant_write_sleep2(log, tic); -- 1.7.2.3 From SRS0+CBlE+24+fromorbit.com=dave@internode.on.net Tue Dec 21 03:00:20 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.6 required=5.0 tests=BAYES_00,J_CHICKENPOX_43, J_CHICKENPOX_66,J_CHICKENPOX_92 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL90Ki4254476 for ; Tue, 21 Dec 2010 03:00:20 -0600 X-ASG-Debug-ID: 1292922135-741e015b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 589191470507 for ; Tue, 21 Dec 2010 01:02:16 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id hY844XXHfzt32D3n for ; Tue, 21 Dec 2010 01:02:16 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50441909-1927428 for ; Tue, 21 Dec 2010 19:32:14 +1030 (CDT) Received: from chute ([192.168.1.1] helo=disappointment) by dastard with esmtp (Exim 4.72) (envelope-from ) id 1PUy6m-0001NB-Fq for xfs@oss.sgi.com; Tue, 21 Dec 2010 20:02:12 +1100 Received: from dave by disappointment with local (Exim 4.72) (envelope-from ) id 1PUy6a-0007Nx-Hu for xfs@oss.sgi.com; Tue, 21 Dec 2010 20:02:00 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: [PATCH] xfsqa: make hole tests independent of speculative allocation patterns Subject: [PATCH] xfsqa: make hole tests independent of speculative allocation patterns Date: Tue, 21 Dec 2010 20:02:00 +1100 Message-Id: <1292922120-28360-1-git-send-email-david@fromorbit.com> X-Mailer: git-send-email 1.7.2.3 X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1292922137 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50058 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean From: Dave Chinner Many of the "count-the-holes" tests (008, 012, etc) do writes that extend the file and hence allocation patterns are dependent on speculative allocation beyond EOF behaviour. Hence if we change that behaviour, these tests all fail because there is a different pattern of holes. Make the tests independent of EOF preallocation behaviour by first truncating the file to the size the test is defined to use. This prevents speculative prealocation from occurring, and hence changes in such behaviour will not cause the tests to fail. Signed-off-by: Dave Chinner --- 203 | 4 ++++ src/holes.c | 11 +++++++++++ src/randholes.c | 10 ++++++++++ 3 files changed, 25 insertions(+), 0 deletions(-) diff --git a/203 b/203 index 6fae361..be69dfa 100755 --- a/203 +++ b/203 @@ -36,6 +36,10 @@ _write_holes() file=$1 holes=$2 let writes=$holes+1 + let fsize=$(($writes * 0x100000)) + + # prevent EOF preallocation from affecting results + xfs_io -f $file -c "truncate $fsize" offset=0 for i in `seq 0 $writes`; do diff --git a/src/holes.c b/src/holes.c index 1ad5093..3be8a66 100644 --- a/src/holes.c +++ b/src/holes.c @@ -79,6 +79,17 @@ main(int argc, char *argv[]) perror("open"); return 1; } + + /* + * Avoid allocation patterns being perturbed by different speculative + * preallocation beyond EOF configurations by first truncating the file + * to the expected maximum file size. + */ + if (ftruncate(fd, filesize) < 0) { + perror("ftruncate"); + exit(EXIT_FAILURE); + } + for (i = 0; i < count; i++) { writeblks(fd, filesize, blocksize, interleave, i, rev); } diff --git a/src/randholes.c b/src/randholes.c index b7c89b3..b43da81 100644 --- a/src/randholes.c +++ b/src/randholes.c @@ -208,6 +208,16 @@ writeblks(char *fname, int fd, size_t alignment) memset(buffer, 0, blocksize); } + /* + * Avoid allocation patterns being perturbed by different speculative + * preallocation beyond EOF configurations by first truncating the file + * to the expected maximum file size. + */ + if (ftruncate(fd, filesize) < 0) { + perror("ftruncate"); + exit(EXIT_FAILURE); + } + do { if (verbose && ((count % 100) == 0)) { printf("."); -- 1.7.2.3 From melvin@healthyfirst.com Tue Dec 21 03:31:47 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: **** X-Spam-Status: No, score=4.0 required=5.0 tests=BAYES_99 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBL9VlNn258521 for ; Tue, 21 Dec 2010 03:31:47 -0600 X-ASG-Debug-ID: 1292924022-415b00570000-w1Z2WR X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from webserver.webnicc.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B97021CE351F for ; Tue, 21 Dec 2010 01:33:42 -0800 (PST) Received: from webserver.webnicc.com ([202.190.70.202]) by cuda.sgi.com with ESMTP id evQKpdUNJ5BRFGAt for ; Tue, 21 Dec 2010 01:33:42 -0800 (PST) Received: from cm132.zeta204.maxonline.com.sg ([116.87.204.132] helo=[192.168.0.100]) by webserver.webnicc.com with esmtpa (Exim 4.67) (envelope-from ) id 1PUybE-00049U-Bz for linux-xfs@oss.sgi.com; Tue, 21 Dec 2010 17:33:40 +0800 Message-Id: Mime-Version: 1.0 From: "Melvin" To: "Brian Tan" X-ASG-Orig-Subj: Magnum 4D Jackpot 1 Winning Formula! 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Melvin From lczerner@redhat.com Tue Dec 21 04:39:55 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLAdt3n007006 for ; Tue, 21 Dec 2010 04:39:55 -0600 X-ASG-Debug-ID: 1292928112-417003290000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.redhat.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3F9601CE3B30 for ; Tue, 21 Dec 2010 02:41:52 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by cuda.sgi.com with ESMTP id vHTl7bDpcwQSlBVC for ; Tue, 21 Dec 2010 02:41:52 -0800 (PST) X-ASG-Whitelist: Barracuda Reputation Received: from int-mx10.intmail.prod.int.phx2.redhat.com (int-mx10.intmail.prod.int.phx2.redhat.com [10.5.11.23]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id oBLAfjBJ006492 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Tue, 21 Dec 2010 05:41:46 -0500 Received: from dhcp-lab-213.englab.brq.redhat.com (dhcp-27-109.brq.redhat.com [10.34.27.109]) by int-mx10.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id oBLAfgC6009228 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Tue, 21 Dec 2010 05:41:44 -0500 Date: Tue, 21 Dec 2010 11:41:42 +0100 (CET) From: Lukas Czerner X-X-Sender: lukas@dhcp-lab-213.englab.brq.redhat.com To: Christoph Hellwig cc: Lukas Czerner , xfs@oss.sgi.com, esandeen@redhat.com X-ASG-Orig-Subj: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Subject: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation In-Reply-To: <20101220174146.GA32680@infradead.org> Message-ID: References: <1291996407-26251-1-git-send-email-lczerner@redhat.com> <20101220174146.GA32680@infradead.org> User-Agent: Alpine 2.00 (LFD 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Scanned-By: MIMEDefang 2.68 on 10.5.11.23 X-Barracuda-Connect: mx1.redhat.com[209.132.183.28] X-Barracuda-Start-Time: 1292928113 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, 20 Dec 2010, Christoph Hellwig wrote: > Hi Lukas, > > I've looked over it a bit again, and I can't really comment on the code > too much, as my bash fu is nowhere near a level to actually make sense > of most of the testcase. I have however ran it in a few setups and > can comment based on that. > > First your current first discard to check if we actually support it is > not handled correctly. Running the test on a filesystem that doesn't > support it currently fails the test for me with: > > @@ -1,3 +1,2 @@ > QA output created by 249 > -Checking FITRIM support: done. > -Running the test: done. > +Checking FITRIM support: fstrim: FSTRIM: Inappropriate ioctl for device > > This should be easily fixable by redirecting the output of the test > command to /dev/null and do a _notrun if it exited with an error value, > just like other tests that require non-standard behaviour. > > Second using data from /usr/share/doc seems a bit non-deterministic to > me, as the content will be different on every system. Any chance you > could just use the xfstests source code instead? > > Third the testcase runs forever, e.g. 93 minutes in my KVM setup, even > using a no-op discard implementation. While this is useful for burn in > testing having a shorter run time version that can be run automatically > would be really useful. I tried to figure out what paramters control > the runtime, but as mentioned above my bash skill really aren't enough > to do that. You can lower the "nproc" variable, optionally you can also lower "repeat" variable in run_process(). Hi Christoph, thanks a lot for review. I certainly can use xfstests source code, so I'll change that. Regarding the duration of the test, it is kind of hard to determine the right amount of load, because the devices and machines differs a lot. It also involves a LOT of copying files so I guess it might be a little slow. However I need to be careful with reducing number of concurrent processes, because with less stress it might be harder to hit potential problem. (you can always But I'll try to test it an find just the right balance. Thanks again. -Lukas From karn@philkarn.net Tue Dec 21 05:01:27 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: ** X-Spam-Status: No, score=3.0 required=5.0 tests=BAYES_20,HTML_MESSAGE autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLB1R2I010443 for ; Tue, 21 Dec 2010 05:01:27 -0600 X-ASG-Debug-ID: 1292929403-140400b70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-fx0-f50.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9AC991CDD7DE for ; Tue, 21 Dec 2010 03:03:24 -0800 (PST) Received: from mail-fx0-f50.google.com (mail-fx0-f50.google.com [209.85.161.50]) by cuda.sgi.com with ESMTP id IWMDzCgXIcALq7t8 for ; Tue, 21 Dec 2010 03:03:24 -0800 (PST) Received: by fxm14 with SMTP id 14so3848638fxm.37 for ; Tue, 21 Dec 2010 03:03:23 -0800 (PST) Received: by 10.223.106.134 with SMTP id x6mr1763283fao.73.1292929403306; Tue, 21 Dec 2010 03:03:23 -0800 (PST) MIME-Version: 1.0 Received: by 10.223.122.78 with HTTP; Tue, 21 Dec 2010 03:03:03 -0800 (PST) Reply-To: karn@ka9q.net In-Reply-To: References: <1291996407-26251-1-git-send-email-lczerner@redhat.com> <20101220174146.GA32680@infradead.org> From: Phil Karn Date: Tue, 21 Dec 2010 03:03:03 -0800 Message-ID: X-ASG-Orig-Subj: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Subject: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation To: xfs@oss.sgi.com Content-Type: multipart/alternative; boundary=001636c5b4d8cdc4460497e995db X-Barracuda-Connect: mail-fx0-f50.google.com[209.85.161.50] X-Barracuda-Start-Time: 1292929404 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0209 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50067 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 HTML_MESSAGE BODY: HTML included in message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --001636c5b4d8cdc4460497e995db Content-Type: text/plain; charset=UTF-8 What is the plan for TRIM support in XFS? I don't see any mention in the 2.6.36.2 sources, so I guess the code you guys have been discussing must not be considered stable yet. How will it eventually work? Will the filesystem automatically issue the commands to the drive whenever a file is deleted, or will it always require some sort of prodding from a userspace program? And what kind of experiences are people having with XFS on current SSDs? I just put an Intel drive in my newly upgraded box and I'm wondering if this blazing performance will screech to a halt when my cumulative writes exceed its 120 GB capacity. Does anyone have a standalone "drive optimizer" that understands XFS, i.e, that can examine an unmounted file system and issue the appropriate TRIM commands for every block on the free list? Or is the Intel drive somehow really good at avoiding write amplification even without TRIM help from the file system? I've heard that may be the case, but I don't understand how that can be. Phil --001636c5b4d8cdc4460497e995db Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable What is the plan for TRIM support in XFS? I don't see any mention in th= e 2.6.36.2 sources, so I guess the code you guys have been discussing must = not be considered stable yet.

How will it eventually work? Will the = filesystem automatically issue the commands to the drive whenever a file is= deleted, or will it always require some sort of prodding from a userspace = program?

And what kind of experiences are people having with XFS on current SSDs= ? I just put an Intel drive in my newly upgraded box and I'm wondering = if this blazing performance will screech to a halt when my cumulative write= s exceed its 120 GB capacity. Does anyone have a standalone "drive opt= imizer" that understands XFS, i.e, that can examine an unmounted file = system and issue the appropriate TRIM commands for every block on the free = list?

Or is the Intel drive somehow really good at avoiding write amplificati= on even without TRIM help from the file system? I've heard that may be = the case, but I don't understand how that can be.

Phil

--001636c5b4d8cdc4460497e995db-- From BATV+4df0dc983a175be70c99+2676+infradead.org+hch@bombadil.srs.infradead.org Tue Dec 21 05:20:28 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLBKROF013463 for ; Tue, 21 Dec 2010 05:20:28 -0600 X-ASG-Debug-ID: 1292930545-65ca01880000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7AD6814709FF for ; Tue, 21 Dec 2010 03:22:25 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id lhOEY0iOu6l2BCbh for ; Tue, 21 Dec 2010 03:22:25 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PV0IS-0000So-9z; Tue, 21 Dec 2010 11:22:24 +0000 Date: Tue, 21 Dec 2010 06:22:24 -0500 From: Christoph Hellwig To: karn@ka9q.net Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Subject: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Message-ID: <20101221112224.GA30242@infradead.org> References: <1291996407-26251-1-git-send-email-lczerner@redhat.com> <20101220174146.GA32680@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292930545 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 03:03:03AM -0800, Phil Karn wrote: > What is the plan for TRIM support in XFS? I don't see any mention in the > 2.6.36.2 sources, so I guess the code you guys have been discussing must not > be considered stable yet. > > How will it eventually work? Will the filesystem automatically issue the > commands to the drive whenever a file is deleted, or will it always require > some sort of prodding from a userspace program? I submitted a patch to add FITRIM support, which should go into 2.6.38 if I get a positive review. That is the variant that is triggered by the fstim userspace program and what the test we're discussing here exercises. I've also prototyped various forms of online discard, but none of them is quite ready yet. I've started porting some allocator patches from Dave forward, which are a requirement for reliable online discard. After that I need to decide which of the variants we'll actually use. So far the "dumb" discard at transaction commit time shows the best results. > And what kind of experiences are people having with XFS on current SSDs? I > just put an Intel drive in my newly upgraded box and I'm wondering if this > blazing performance will screech to a halt when my cumulative writes exceed > its 120 GB capacity. Does anyone have a standalone "drive optimizer" that > understands XFS, i.e, that can examine an unmounted file system and issue > the appropriate TRIM commands for every block on the free list? The intel SSDs do quite fine without constant trimming, as do most current SSDs. I only know of one sample that areally needs periodic trims, but AFAIK it's not generally available yet (sorry, can't name the vendor due to NDAs). But even with the current ones a TRIM once in a while is useful, but about once every couple of weeks is enough. For a system not constantly loaded you can use Mark Lord's wiper.sh script, but be aware it only works on disks / partitions and not on LVM volumes. Once the FITRIM support is in you can use that for the same purpose, with the benefit of also working over LVM, and also working nicely on a system under heavy use, as it doesn't have to allocate all free space as the userspace hack done by wiper.sh does. > Or is the Intel drive somehow really good at avoiding write amplification > even without TRIM help from the file system? I've heard that may be the > case, but I don't understand how that can be. No, the Intel disks actually degrade a lot after heavy use. Unfortunately even regular trims don't always seem to solve this. From bharrosh@panasas.com Tue Dec 21 05:30:35 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLBUYcw014126 for ; Tue, 21 Dec 2010 05:30:35 -0600 X-ASG-Debug-ID: 1292931151-657102910000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from daytona.panasas.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8DA092126F4 for ; Tue, 21 Dec 2010 03:32:31 -0800 (PST) Received: from daytona.panasas.com (daytona.panasas.com [67.152.220.89]) by cuda.sgi.com with ESMTP id orYCTGI49DG58tGA for ; Tue, 21 Dec 2010 03:32:31 -0800 (PST) Received: from fs2.bhalevy.com ([172.17.33.36]) by daytona.panasas.com with Microsoft SMTPSVC(6.0.3790.4675); Tue, 21 Dec 2010 06:32:25 -0500 Message-ID: <4D109047.8050300@panasas.com> Date: Tue, 21 Dec 2010 13:32:23 +0200 From: Boaz Harrosh User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.15) Gecko/20101027 Fedora/3.0.10-1.fc12 Thunderbird/3.0.10 MIME-Version: 1.0 To: Christoph Hellwig CC: xfs@oss.sgi.com, linux-kernel@vger.kernel.org X-ASG-Orig-Subj: Re: XFS status update for November 2010 Subject: Re: XFS status update for November 2010 References: <20101220180013.GA16283@infradead.org> In-Reply-To: <20101220180013.GA16283@infradead.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 21 Dec 2010 11:32:25.0246 (UTC) FILETIME=[BD8EF3E0:01CBA102] X-Barracuda-Connect: daytona.panasas.com[67.152.220.89] X-Barracuda-Start-Time: 1292931152 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50069 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/20/2010 08:00 PM, Christoph Hellwig wrote: >>From looking at the kernel git commits November looked like a pretty > slow month with just two hand full fixes going into the release candidates > for Linux 2.6.37, and none at all going into the development tree. > But in this case git statistics didn't tell the whole story - there > was a lot of activity on patches for the next merge window on the list. > The focus in November was still at metadata scalability, with various > patchsets that improves parallel creates and unlinks again, and also > improves 8-way dbench throughput by 30%. In addition to that there > were patches to improve preallocation for NFS servers, to simplify > the writeback code, and to remove the XFS-internal percpu counters > for free space for the generic kernel percpu counters, which just needed > a small improvement. > > On the user space side we saw the release of xfsprogs 3.1.4, which > contains various accumulated bug fixes and Debian packaging updates. > The xfsdump tree saw a large update to speed up restore by using > mmap for an internal database and remove the limitation of ~ 214 > million directory entries per dump file. The xfstests test suite > saw three new testcases and various fixes, including support for the > hfsplus filesystem. Hi Christoph, happy holidays I love these reports you do, thank you I have one small request, could you please post them to linux-fsdevel as well. linux-kernel@vger.kernel.org is so crowded I keep missing them. Thanks Boaz From yad.naveen@gmail.com Tue Dec 21 08:09:56 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_DKIM_INVALID,T_TO_NO_BRKTS_FREEMAIL autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLE9tQO036700 for ; Tue, 21 Dec 2010 08:09:55 -0600 X-ASG-Debug-ID: 1292940711-493d039f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qw0-f53.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0C44A1611FF3 for ; Tue, 21 Dec 2010 06:11:51 -0800 (PST) Received: from mail-qw0-f53.google.com (mail-qw0-f53.google.com [209.85.216.53]) by cuda.sgi.com with ESMTP id tXb50OfuUmdGKnzG for ; Tue, 21 Dec 2010 06:11:51 -0800 (PST) Received: by qwe5 with SMTP id 5so4346703qwe.26 for ; Tue, 21 Dec 2010 06:11:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=K6wTkgBtODBSYSLl/Acncznelt0x3HZ++VBlz1YBAPw=; b=U1HukO7Zi0S4jbyqmkFrndCkGufjgSOu/Q0Z3EuOBIAMgVPAH/+fxbTdY80qBJgSd3 aSEKI90Cv+87UY9ylSEZThC3ki+pXLTU9jzrNo7g96pKArhb5OVqluIKk07DtyH/JeBA 01A3xjCdKJVE6CM79mRE7vTjnVy8px41cVjHM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=dWj6f4t/FEX1D1W/EyDQOWg8WVbEg9HltfWfuQnhwUrt9ZYEyvjB08RZVS8z0N3rAw rCxV0nZND4Fjc++9Opi3MTEMmpuNJ1ZSukfLEVF+Ti3OuUset7kPYxfdztZ9GC2SyvNl eV2wI72YaVccpswVV3E159atw2w/yLPHmsgxw= MIME-Version: 1.0 Received: by 10.229.184.13 with SMTP id ci13mr4858193qcb.134.1292940711293; Tue, 21 Dec 2010 06:11:51 -0800 (PST) Received: by 10.229.75.13 with HTTP; Tue, 21 Dec 2010 06:11:51 -0800 (PST) In-Reply-To: References: Date: Tue, 21 Dec 2010 19:41:51 +0530 Message-ID: X-ASG-Orig-Subj: Issue on kernel 2.6.35.9 vanilla Subject: Issue on kernel 2.6.35.9 vanilla From: naveen yadav To: xfs@oss.sgi.com Content-Type: multipart/mixed; boundary=0016363b9292cff2dd0497ec37b8 X-Barracuda-Connect: mail-qw0-f53.google.com[209.85.216.53] X-Barracuda-Start-Time: 1292940713 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M, DKIM_SIGNED, DKIM_VERIFIED X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50080 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --0016363b9292cff2dd0497ec37b8 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi all, We have one disk that got corrupted, when I connect to my PC, haveing kernel version(2.6.35.9). The Disk mount well, but when i do 'ls; command it hangs. Please find the dmesg. /0x22 [xfs] =A0[] xfs_da_do_buf+0x582/0x628 [xfs] =A0[] ? xfs_da_read_buf+0x1d/0x22 [xfs] =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] =A0[] ? xfs_da_read_buf+0x1d/0x22 [xfs] =A0[] xfs_da_read_buf+0x1d/0x22 [xfs] =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] =A0[] xfs_da_node_lookup_int+0x52/0x207 [xfs] =A0[] xfs_dir2_node_lookup+0x5f/0xee [xfs] =A0[] xfs_dir_lookup+0xde/0x110 [xfs] =A0[] xfs_lookup+0x50/0x9f [xfs] =A0[] xfs_vn_lookup+0x3e/0x76 [xfs] =A0[] do_lookup+0xc9/0x139 =A0[] link_path_walk+0x326/0x44d =A0[] ? default_wake_function+0x10/0x12 =A0[] path_walk+0x3f/0x89 =A0[] ? path_init+0x9e/0x10c =A0[] do_path_lookup+0x26/0x74 =A0[] user_path_at+0x46/0x6c =A0[] ? remove_wait_queue+0x27/0x2c =A0[] ? spin_unlock_irqrestore+0xd/0xf =A0[] ? __wake_up+0x37/0x40 =A0[] vfs_fstatat+0x32/0x59 =A0[] ? fsnotify_modify+0x54/0x5f =A0[] vfs_lstat+0x1b/0x1d =A0[] sys_lstat64+0x19/0x2d =A0[] ? vfs_write+0xb5/0xf4 =A0[] ? audit_syscall_entry+0x12a/0x14c =A0[] ? trace_hardirqs_on_thunk+0xc/0x10 =A0[] sysenter_do_call+0x12/0x2d c2d9d000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff =A0..............= .. Filesystem "sdb2": XFS internal error xfs_da_do_buf(2) at line 2113 of file fs/xfs/xfs_da_btree.c. =A0Caller 0xe0dfd3ce Pid: 2199, comm: ls Not tainted 2.6.35.9 #1 Call Trace: =A0[] xfs_error_report+0x31/0x33 [xfs] =A0[] xfs_corruption_error+0x3e/0x48 [xfs] =A0[] ? xfs_da_read_buf+0x1d/0x22 [xfs] =A0[] xfs_da_do_buf+0x582/0x628 [xfs] =A0[] ? xfs_da_read_buf+0x1d/0x22 [xfs] =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] =A0[] ? xfs_da_read_buf+0x1d/0x22 [xfs] =A0[] xfs_da_read_buf+0x1d/0x22 [xfs] =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] =A0[] xfs_da_node_lookup_int+0x52/0x207 [xfs] =A0[] xfs_dir2_node_lookup+0x5f/0xee [xfs] =A0[] xfs_dir_lookup+0xde/0x110 [xfs] =A0[] xfs_lookup+0x50/0x9f [xfs] =A0[] xfs_vn_lookup+0x3e/0x76 [xfs] =A0[] do_lookup+0xc9/0x139 =A0[] link_path_walk+0x326/0x44d --0016363b9292cff2dd0497ec37b8 Content-Type: application/octet-stream; name="log-2.6.35.9-ls-hang" Content-Disposition: attachment; filename="log-2.6.35.9-ls-hang" Content-Transfer-Encoding: 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eGJlCiBbPGMwNGQxOTQxPl0gZG9fc3lzX29wZW4rMHg0ZC8weGU0CiBbPGMwNDdkMGY0Pl0gPyBh dWRpdF9zeXNjYWxsX2VudHJ5KzB4MTJhLzB4MTRjCiBbPGMwNGQxYTI0Pl0gc3lzX29wZW4rMHgy My8weDJiCiBbPGMwNDA3ZmQ4Pl0gc3lzZW50ZXJfZG9fY2FsbCsweDEyLzB4MmQKdXNiIDEtMjog VVNCIGRpc2Nvbm5lY3QsIGFkZHJlc3MgOQo= --0016363b9292cff2dd0497ec37b8-- From BATV+4df0dc983a175be70c99+2676+infradead.org+hch@bombadil.srs.infradead.org Tue Dec 21 09:02:16 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLF2G7x043162 for ; Tue, 21 Dec 2010 09:02:16 -0600 X-ASG-Debug-ID: 1292943853-20e1030f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2472F4F3B0C for ; Tue, 21 Dec 2010 07:04:14 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id gZNTIjV6kg7AILSz for ; Tue, 21 Dec 2010 07:04:14 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PV3l7-0004QI-6c; Tue, 21 Dec 2010 15:04:13 +0000 Date: Tue, 21 Dec 2010 10:04:13 -0500 From: Christoph Hellwig To: Lukas Czerner Cc: xfs@oss.sgi.com, hch@infradead.org, esandeen@redhat.com X-ASG-Orig-Subj: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Subject: Re: [PATCH] Add test 248: Check filesystem FITRIM implementation Message-ID: <20101221150413.GA15542@infradead.org> References: <1291996407-26251-1-git-send-email-lczerner@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1291996407-26251-1-git-send-email-lczerner@redhat.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292943854 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Another one I only noticed now: fstrim.c: In function 'main': fstrim.c:245: warning: format '%lu' expects type 'long unsigned int', but argument 3 has type 'uint64_t' From BATV+4df0dc983a175be70c99+2676+infradead.org+hch@bombadil.srs.infradead.org Tue Dec 21 09:13:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLFDFYl044236 for ; Tue, 21 Dec 2010 09:13:15 -0600 X-ASG-Debug-ID: 1292944513-3bf401100000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 99C962014CD for ; Tue, 21 Dec 2010 07:15:13 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id dhpiRo8hY3ihTjUp for ; Tue, 21 Dec 2010 07:15:13 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PV3vj-0007YM-OQ; Tue, 21 Dec 2010 15:15:11 +0000 Date: Tue, 21 Dec 2010 10:15:11 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 06/34] xfs: dynamic speculative EOF preallocation Subject: Re: [PATCH 06/34] xfs: dynamic speculative EOF preallocation Message-ID: <20101221151511.GA26127@infradead.org> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-7-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292916570-25015-7-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292944513 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This patch causes tesr 014 to take ~ 870 seconds instead of 6, thus beeing almost 150 times slower on mt 32-bit test VM, so I'll have to NAK it for now. From BATV+4df0dc983a175be70c99+2676+infradead.org+hch@bombadil.srs.infradead.org Tue Dec 21 09:13:55 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLFDtFt044315 for ; Tue, 21 Dec 2010 09:13:55 -0600 X-ASG-Debug-ID: 1292944553-3c1500fe0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 5AC902136A9 for ; Tue, 21 Dec 2010 07:15:53 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id JYI4WW43SFLb3Afi for ; Tue, 21 Dec 2010 07:15:53 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PV3wO-0007ct-Ub; Tue, 21 Dec 2010 15:15:52 +0000 Date: Tue, 21 Dec 2010 10:15:52 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 01/34] xfs: provide a inode iolock lockdep class Subject: Re: [PATCH 01/34] xfs: provide a inode iolock lockdep class Message-ID: <20101221151552.GB26127@infradead.org> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-2-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292916570-25015-2-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292944553 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 06:28:57PM +1100, Dave Chinner wrote: > From: Dave Chinner > > The XFS iolock needs to be re-initialised to a new lock class before > it enters reclaim to prevent lockdep false positives. Unfortunately, > this is not sufficient protection as inodes in the XFS_IRECLAIMABLE > state can be recycled and not re-initialised before being reused. > > We need to re-initialise the lock state when transfering out of > XFS_IRECLAIMABLE state to XFS_INEW, but we need to keep the same > class as if the inode was just allocated. Hence we need a specific > lockdep class variable for the iolock so that both initialisations > use the same class. > > While there, add a specific class for inodes in the reclaim state so > that it is easy to tell from lockdep reports what state the inode > was in that generated the report. > > Signed-off-by: Dave Chinner I think I already reviewed this one, but in case it got lost: Reviewed-by: Christoph Hellwig From BATV+4df0dc983a175be70c99+2676+infradead.org+hch@bombadil.srs.infradead.org Tue Dec 21 09:14:18 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLFEHJt044411 for ; Tue, 21 Dec 2010 09:14:18 -0600 X-ASG-Debug-ID: 1292944575-334800f20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 989921465B27 for ; Tue, 21 Dec 2010 07:16:15 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id rpRQXZl6rODbE3VJ for ; Tue, 21 Dec 2010 07:16:15 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PV3wk-0007ft-Us; Tue, 21 Dec 2010 15:16:15 +0000 Date: Tue, 21 Dec 2010 10:16:14 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 02/34] xfs: use KM_NOFS for allocations during attribute list operations Subject: Re: [PATCH 02/34] xfs: use KM_NOFS for allocations during attribute list operations Message-ID: <20101221151614.GC26127@infradead.org> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-3-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292916570-25015-3-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292944575 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 06:28:58PM +1100, Dave Chinner wrote: > From: Dave Chinner > > When listing attributes, we are doiing memory allocations under the > inode ilock using only KM_SLEEP. This allows memory allocation to > recurse back into the filesystem and do writeback, which may the > ilock we already hold on the current inode. THis will deadlock. > Hence use KM_NOFS for such allocations outside of transaction > context to ensure that reclaim recursion does not occur. Looks good, Reviewed-by: Christoph Hellwig From BATV+4df0dc983a175be70c99+2676+infradead.org+hch@bombadil.srs.infradead.org Tue Dec 21 10:43:45 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLGhjji057238 for ; Tue, 21 Dec 2010 10:43:45 -0600 X-ASG-Debug-ID: 1292949942-1d2400180000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 22C04212375 for ; Tue, 21 Dec 2010 08:45:42 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id D8exaVpFcTx078zI for ; Tue, 21 Dec 2010 08:45:42 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PV5LJ-000397-9w; Tue, 21 Dec 2010 16:45:41 +0000 Date: Tue, 21 Dec 2010 11:45:41 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 07/34] xfs: don't truncate prealloc from frequently accessed inodes Subject: Re: [PATCH 07/34] xfs: don't truncate prealloc from frequently accessed inodes Message-ID: <20101221164541.GA9093@infradead.org> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-8-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292916570-25015-8-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292949943 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 06:29:03PM +1100, Dave Chinner wrote: > From: Dave Chinner > > A long standing problem for streaming write?? through the NFS server > has been that the NFS server opens and closes file descriptors on an > inode for every write. The result of this behaviour is that the > ->release() function is called on every close and that results in > XFS truncating speculative preallocation beyond the EOF. This has > an adverse effect on file layout when multiple files are being > written at the same time - they interleave their extents and can > result in severe fragmentation. > > To avoid this problem, keep a count of the number of ->release calls > made on an inode. For most cases, an inode is only going to be opened > once for writing and then closed again during it's lifetime in > cache. Hence if there are multiple ->release calls, there is a good > chance that the inode is being accessed by the NFS server. Hence > count up every time ->release is called while there are delalloc > blocks still outstanding on the inode. > > If this count is non-zero when ->release is next called, then do no > truncate away the speculative preallocation - leave it there so that > subsequent writes do not need to reallocate the delalloc space. This > will prevent interleaving of extents of different inodes written > concurrently to the same AG. > > If we get this wrong, it is not a big deal as we truncate > speculative allocation beyond EOF anyway in xfs_inactive() when the > inode is thrown out of the cache. Looks good. > The new counter in the struct xfs_inode fits into a hole in the > structure on 64 bit machines, so does not grow the size of the inode > at all. There's no counter any more. (the text further above could also use some minor updates for that) Reviewed-by: Christoph Hellwig From BATV+4df0dc983a175be70c99+2676+infradead.org+hch@bombadil.srs.infradead.org Tue Dec 21 10:44:36 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLGiaOR057416 for ; Tue, 21 Dec 2010 10:44:36 -0600 X-ASG-Debug-ID: 1292949993-78b3026b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0DEF614712CC for ; Tue, 21 Dec 2010 08:46:33 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id ERIkL1GV6MgfGoJl for ; Tue, 21 Dec 2010 08:46:33 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PV5M8-0003Ce-PZ; Tue, 21 Dec 2010 16:46:32 +0000 Date: Tue, 21 Dec 2010 11:46:32 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH] xfsqa: make hole tests independent of speculative allocation patterns Subject: Re: [PATCH] xfsqa: make hole tests independent of speculative allocation patterns Message-ID: <20101221164632.GB9093@infradead.org> References: <1292922120-28360-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292922120-28360-1-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1292949994 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 08:02:00PM +1100, Dave Chinner wrote: > From: Dave Chinner > > Many of the "count-the-holes" tests (008, 012, etc) do writes that extend the > file and hence allocation patterns are dependent on speculative allocation > beyond EOF behaviour. Hence if we change that behaviour, these tests all fail > because there is a different pattern of holes. > > Make the tests independent of EOF preallocation behaviour by first truncating > the file to the size the test is defined to use. This prevents speculative > prealocation from occurring, and hence changes in such behaviour will not cause > the tests to fail. > > Signed-off-by: Dave Chinner Looks good and fixes the test failure I saw with the dirty release counter patch. Reviewed-by: Christoph Hellwig From SRS0+w/qT+24+fromorbit.com=david@internode.on.net Tue Dec 21 15:29:25 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLLTOBC095442 for ; Tue, 21 Dec 2010 15:29:25 -0600 X-ASG-Debug-ID: 1292967080-6e9201770000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 05359214AC9 for ; Tue, 21 Dec 2010 13:31:20 -0800 (PST) Received: from mail.internode.on.net (bld-mail13.adl6.internode.on.net [150.101.137.98]) by cuda.sgi.com with ESMTP id GpZFq9aHbOTwmES9 for ; Tue, 21 Dec 2010 13:31:20 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50900821-1927428 for multiple; Wed, 22 Dec 2010 08:01:18 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PV9nR-0002Qn-64; Wed, 22 Dec 2010 08:31:01 +1100 Date: Wed, 22 Dec 2010 08:31:01 +1100 From: Dave Chinner To: naveen yadav Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Issue on kernel 2.6.35.9 vanilla Subject: Re: Issue on kernel 2.6.35.9 vanilla Message-ID: <20101221213101.GA4907@dastard> References: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail13.adl6.internode.on.net[150.101.137.98] X-Barracuda-Start-Time: 1292967082 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50109 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 07:41:51PM +0530, naveen yadav wrote: > Hi all, > > We have one disk that got corrupted, when I connect to my PC, haveing > kernel version(2.6.35.9). > The Disk mount well, but when i do 'ls; command it hangs. ls shouldn't hang. This should return: > Please find the dmesg. > /0x22 [xfs] >  [] xfs_da_do_buf+0x582/0x628 [xfs] >  [] ? xfs_da_read_buf+0x1d/0x22 [xfs] >  [] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] >  [] ? xfs_da_read_buf+0x1d/0x22 [xfs] >  [] xfs_da_read_buf+0x1d/0x22 [xfs] >  [] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] >  [] xfs_da_node_lookup_int+0x52/0x207 [xfs] >  [] xfs_dir2_node_lookup+0x5f/0xee [xfs] >  [] xfs_dir_lookup+0xde/0x110 [xfs] >  [] xfs_lookup+0x50/0x9f [xfs] >  [] xfs_vn_lookup+0x3e/0x76 [xfs] >  [] do_lookup+0xc9/0x139 >  [] link_path_walk+0x326/0x44d >  [] ? default_wake_function+0x10/0x12 >  [] path_walk+0x3f/0x89 >  [] ? path_init+0x9e/0x10c >  [] do_path_lookup+0x26/0x74 >  [] user_path_at+0x46/0x6c >  [] ? remove_wait_queue+0x27/0x2c >  [] ? spin_unlock_irqrestore+0xd/0xf >  [] ? __wake_up+0x37/0x40 >  [] vfs_fstatat+0x32/0x59 >  [] ? fsnotify_modify+0x54/0x5f >  [] vfs_lstat+0x1b/0x1d >  [] sys_lstat64+0x19/0x2d >  [] ? vfs_write+0xb5/0xf4 >  [] ? audit_syscall_entry+0x12a/0x14c >  [] ? trace_hardirqs_on_thunk+0xc/0x10 >  [] sysenter_do_call+0x12/0x2d > c2d9d000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff  ................ > Filesystem "sdb2": XFS internal error xfs_da_do_buf(2) at line 2113 of > file fs/xfs/xfs_da_btree.c.  Caller 0xe0dfd3ce an EIO or EUCLEAN error to ls as it encountered a corrupted directory block. Can you post the output of: # echo w > /proc/sysrq-trigger to show us where it has hung? Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+r6Os+24+fromorbit.com=david@internode.on.net Tue Dec 21 15:40:49 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLLemnh096907 for ; Tue, 21 Dec 2010 15:40:48 -0600 X-ASG-Debug-ID: 1292967762-0f1602520000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3DF6F1472734 for ; Tue, 21 Dec 2010 13:42:43 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id SHdJ1Fk1nSzMKGQz for ; Tue, 21 Dec 2010 13:42:43 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50637785-1927428 for multiple; Wed, 22 Dec 2010 08:12:42 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PV9yi-0002SY-OB; Wed, 22 Dec 2010 08:42:40 +1100 Date: Wed, 22 Dec 2010 08:42:40 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 06/34] xfs: dynamic speculative EOF preallocation Subject: Re: [PATCH 06/34] xfs: dynamic speculative EOF preallocation Message-ID: <20101221214240.GB4907@dastard> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-7-git-send-email-david@fromorbit.com> <20101221151511.GA26127@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101221151511.GA26127@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1292967766 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0001 1.0000 -2.0204 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50110 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 10:15:11AM -0500, Christoph Hellwig wrote: > This patch causes tesr 014 to take ~ 870 seconds instead of 6, thus > beeing almost 150 times slower on mt 32-bit test VM, so I'll have to NAK > it for now. It's not the speculative preallocation changes - ithey are just exposing some other regression. That is, using MOUNT_OPTIONS="-o allocsize=4k" gives the previous behaviour, while allocsize=512m gives the same behaviour as the dynamic preallocation. The dynamic behaviour is resulting in megabyte sized IOs being issued for random 512 byte writes (which is wrong), so I'm tending towards it being a regression caused by the reecent writeback path changes. I'll dig deeper today. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+r6Os+24+fromorbit.com=david@internode.on.net Tue Dec 21 17:42:19 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_66 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLNgJpO116663 for ; Tue, 21 Dec 2010 17:42:19 -0600 X-ASG-Debug-ID: 1292975054-73a203310000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4F5AE1CE9852 for ; Tue, 21 Dec 2010 15:44:14 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id WZWxVLcOj1Vc2xCj for ; Tue, 21 Dec 2010 15:44:14 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 51163311-1927428 for multiple; Wed, 22 Dec 2010 10:14:13 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVBsK-0002cd-3J; Wed, 22 Dec 2010 10:44:12 +1100 Date: Wed, 22 Dec 2010 10:44:12 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 06/34] xfs: dynamic speculative EOF preallocation Subject: Re: [PATCH 06/34] xfs: dynamic speculative EOF preallocation Message-ID: <20101221234412.GC4907@dastard> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-7-git-send-email-david@fromorbit.com> <20101221151511.GA26127@infradead.org> <20101221214240.GB4907@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101221214240.GB4907@dastard> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1292975056 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_SA210e X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50117 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 BSF_SC5_SA210e Custom Rule SA210e X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 22, 2010 at 08:42:40AM +1100, Dave Chinner wrote: > On Tue, Dec 21, 2010 at 10:15:11AM -0500, Christoph Hellwig wrote: > > This patch causes tesr 014 to take ~ 870 seconds instead of 6, thus > > beeing almost 150 times slower on mt 32-bit test VM, so I'll have to NAK > > it for now. > > It's not the speculative preallocation changes - ithey are just > exposing some other regression. That is, using MOUNT_OPTIONS="-o > allocsize=4k" gives the previous behaviour, while allocsize=512m > gives the same behaviour as the dynamic preallocation. > > The dynamic behaviour is resulting in megabyte sized IOs being > issued for random 512 byte writes (which is wrong), so I'm tending > towards it being a regression caused by the reecent writeback path > changes. I'll dig deeper today. Ok, it's not a recent regression - it's the fact that the test is writing and truncating to random offsets so the file size is constantly changing resulting in xfs_zero_eof() writing huge amounts of zeros into preallocated extents beyond EOF. The patch below explains the situation and the change to the test to avoid the extended runtime. Ultimately, we probably need to change xfs_zero_eof() to allocate unwritten extents rather than write megabytes of zero for speculative allocation beyond EOF. However, I'm going to worry about that when (if) we come across applications that trigger this issue. -- xfstests: 014 takes forever with large preallocation sizes From: Dave Chinner Christoph reported that test 014 went from 7s to 870s runtime with the dynamic speculative delayed allocation changes. Analysis of test 014 shows that it does this loop 10,000 times: pwrite(random offset, 512 bytes); truncate(random offset); Where the random offset is anywhere in a 256MB file. Hence on average every second write or truncate extends the file. If large preallocatione beyond EOF sizes are used each extending write or truncate will zero large numbers of blocks - tens of megabytes at a time. The result is that instead of only writing ~10,000 blocks, we write hundreds to thousands of megabytes of zeros to the file and that is where the difference in runtime is coming from. The IO pattern that this test is using does not reflect a common (or sane!) real-world application IO pattern, so it is really just exercising the allocation and truncation paths in XFS. To do this, we don't need large amounts of preallocation beyond EOF that just slows down the operation, so execute the test with a fixed, small preallocation size that reflects the previous default. By specifying the preallocation size via the allocsize mount option, this also overrides any custom allocsize option provided for the test, so the test will not revert to extremely long runtimes when allocsize is provided on the command line. However, to ensure that we do actually get some coverage of the zeroing paths, set the allocsize mount option to 64k - this exercises the EOF zeroing paths, but does not affect the runtime of the test. Signed-off-by: Dave Chinner --- 014 | 6 ++++++ 1 files changed, 6 insertions(+), 0 deletions(-) diff --git a/014 b/014 index a0c0403..e6e0a6f 100755 --- a/014 +++ b/014 @@ -50,6 +50,12 @@ _supported_os IRIX Linux _require_sparse_files _setup_testdir +# ensure EOF preallocation doesn't massively extend the runtime of this test +# by limiting the amount of preallocation and therefore the amount of blocks +# zeroed during the truncfile test run. +umount $TEST_DIR +_test_mount -o allocsize=64k + echo "brevity is wit..." echo "------" From SRS0+45mW+24+fromorbit.com=david@internode.on.net Tue Dec 21 17:51:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBLNpNs8118493 for ; Tue, 21 Dec 2010 17:51:23 -0600 X-ASG-Debug-ID: 1292975598-4a0c02b70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 07BB721533D for ; Tue, 21 Dec 2010 15:53:19 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id NyxwrBI9wsuRD0Yy for ; Tue, 21 Dec 2010 15:53:19 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50158013-1927428 for multiple; Wed, 22 Dec 2010 10:23:12 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVC0r-0002e8-6O; Wed, 22 Dec 2010 10:53:01 +1100 Date: Wed, 22 Dec 2010 10:53:01 +1100 From: Dave Chinner To: Boaz Harrosh Cc: Christoph Hellwig , xfs@oss.sgi.com, linux-kernel@vger.kernel.org X-ASG-Orig-Subj: Re: XFS status update for November 2010 Subject: Re: XFS status update for November 2010 Message-ID: <20101221235301.GD4907@dastard> References: <20101220180013.GA16283@infradead.org> <4D109047.8050300@panasas.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4D109047.8050300@panasas.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292975601 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA085 X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50119 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 BSF_SC0_SA085 Custom Rule SA085 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 01:32:23PM +0200, Boaz Harrosh wrote: > On 12/20/2010 08:00 PM, Christoph Hellwig wrote: > >>From looking at the kernel git commits November looked like a pretty > > slow month with just two hand full fixes going into the release candidates > > for Linux 2.6.37, and none at all going into the development tree. > > But in this case git statistics didn't tell the whole story - there > > was a lot of activity on patches for the next merge window on the list. > > The focus in November was still at metadata scalability, with various > > patchsets that improves parallel creates and unlinks again, and also > > improves 8-way dbench throughput by 30%. In addition to that there > > were patches to improve preallocation for NFS servers, to simplify > > the writeback code, and to remove the XFS-internal percpu counters > > for free space for the generic kernel percpu counters, which just needed > > a small improvement. > > > > On the user space side we saw the release of xfsprogs 3.1.4, which > > contains various accumulated bug fixes and Debian packaging updates. > > The xfsdump tree saw a large update to speed up restore by using > > mmap for an internal database and remove the limitation of ~ 214 > > million directory entries per dump file. The xfstests test suite > > saw three new testcases and various fixes, including support for the > > hfsplus filesystem. > > Hi Christoph, happy holidays > > I love these reports you do, thank you > > I have one small request, could you please post them to > linux-fsdevel as well. linux-kernel@vger.kernel.org is so crowded > I keep missing them. Boaz, you can set up a modification watch on this page: http://xfs.org/index.php/XFS_Status_Updates as Christoph posts the updates there as well. Cheers, Dave. -- Dave Chinner david@fromorbit.com From aelder@sgi.com Tue Dec 21 20:20:06 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBM2K6pT145530 for ; Tue, 21 Dec 2010 20:20:06 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay1.corp.sgi.com (Postfix) with ESMTP id C08E08F8084; Tue, 21 Dec 2010 18:22:01 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 21 Dec 2010 20:20:15 -0600 Subject: Re: [PATCH 03/34] lib: percpu counter add unless less than functionality From: Alex Elder Reply-To: aelder@sgi.com To: Dave Chinner Cc: xfs@oss.sgi.com In-Reply-To: <1292916570-25015-4-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-4-git-send-email-david@fromorbit.com> Content-Type: text/plain; charset="UTF-8" Date: Tue, 21 Dec 2010 20:20:14 -0600 Message-ID: <1292984414.2408.357.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 22 Dec 2010 02:20:15.0251 (UTC) FILETIME=[C4F4A630:01CBA17E] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, 2010-12-21 at 18:28 +1100, Dave Chinner wrote: > From: Dave Chinner > > To use the generic percpu counter infrastructure for counters that > require conditional addition based on a threshold value we need > special handling of the counter. Further, the caller needs to know > the status of the conditional addition to determine what action to > take depending on whether the addition occurred or not. Examples of > this sort of usage are resource counters that cannot go below zero > (e.g. filesystem free blocks). > > To allow XFS to replace it's complex roll-your-own per-cpu > superblock counters, a single generic conditional function is > required: percpu_counter_add_unless_lt(). This will add the amount > to the counter unless the result would be less than the given > threshold. A caller supplied threshold is required because XFS does > not necessarily use the same threshold for every counter. > > percpu_counter_add_unless_lt() attempts to minimise counter lock > traversals by only taking the counter lock when the threshold is > within the error range of the current counter value. Hence when the > threshold is not within the counter error range, the counter will > still have the same scalability characteristics as the normal > percpu_counter_add() function. > > Adding this functionality to the generic percpu counters allows us > to remove the much more complex and less efficient XFS percpu > counter code (~700 lines of code) and replace it with generic > percpu counters. > > Signed-off-by: Dave Chinner I want to look at this one more closely again in the morning, but for now I'll just mention one nit, and one easily fixed problem. -Alex . . . > + * Add @amount to @fdc if and only if result of addition is greater than or ^^^ should be fbc > +EXPORT_SYMBOL(percpu_counter_add_unless_lt); > + This has to be: EXPORT_SYMBOL(__percpu_counter_add_unless_lt); (with leading underscores). From aelder@sgi.com Tue Dec 21 20:20:07 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBM2K6m2145538 for ; Tue, 21 Dec 2010 20:20:06 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay1.corp.sgi.com (Postfix) with ESMTP id 4820C8F80A3; Tue, 21 Dec 2010 18:22:04 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 21 Dec 2010 20:20:47 -0600 Subject: Re: [PATCH 20/34] xfs: remove all the inodes on a buffer from the AIL in bulk From: Alex Elder Reply-To: aelder@sgi.com To: Dave Chinner Cc: xfs@oss.sgi.com In-Reply-To: <1292916570-25015-21-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-21-git-send-email-david@fromorbit.com> Content-Type: text/plain; charset="UTF-8" Date: Tue, 21 Dec 2010 20:20:46 -0600 Message-ID: <1292984446.2408.358.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 22 Dec 2010 02:20:47.0298 (UTC) FILETIME=[D80EA220:01CBA17E] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, 2010-12-21 at 18:29 +1100, Dave Chinner wrote: > From: Dave Chinner > > When inode buffer IO completes, usually all of the inodes are removed from the > AIL. This involves processing them one at a time and taking the AIL lock once > for every inode. When all CPUs are processing inode IO completions, this causes > excessive amount sof contention on the AIL lock. > > Instead, change the way we process inode IO completion in the buffer > IO done callback. Allow the inode IO done callback to walk the list > of IO done callbacks and pull all the inodes off the buffer in one > go and then process them as a batch. > > Once all the inodes for removal are collected, take the AIL lock > once and do a bulk removal operation to minimise traffic on the AIL > lock. > > Signed-off-by: Dave Chinner > Reviewed-by: Christoph Hellwig One question, below. -Alex . . . > @@ -861,28 +910,37 @@ xfs_iflush_done( > * the lock since it's cheaper, and then we recheck while > * holding the lock before removing the inode from the AIL. > */ > - if (iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) { > + if (need_ail) { > + struct xfs_log_item *log_items[need_ail]; What's the worst-case value of need_ail we might see here? From aelder@sgi.com Tue Dec 21 20:34:54 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBM2Ysk1148332 for ; Tue, 21 Dec 2010 20:34:54 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay2.corp.sgi.com (Postfix) with ESMTP id F04A53040D2; Tue, 21 Dec 2010 18:36:49 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Tue, 21 Dec 2010 20:29:38 -0600 Subject: Re: [PATCH 06/34] xfs: dynamic speculative EOF preallocation From: Alex Elder Reply-To: aelder@sgi.com To: Dave Chinner Cc: Christoph Hellwig , xfs@oss.sgi.com In-Reply-To: <20101221234412.GC4907@dastard> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-7-git-send-email-david@fromorbit.com> <20101221151511.GA26127@infradead.org> <20101221214240.GB4907@dastard> <20101221234412.GC4907@dastard> Content-Type: text/plain; charset="UTF-8" Date: Tue, 21 Dec 2010 20:29:37 -0600 Message-ID: <1292984977.2408.359.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 22 Dec 2010 02:29:38.0161 (UTC) FILETIME=[1479E610:01CBA180] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, 2010-12-22 at 10:44 +1100, Dave Chinner wrote: > On Wed, Dec 22, 2010 at 08:42:40AM +1100, Dave Chinner wrote: > > On Tue, Dec 21, 2010 at 10:15:11AM -0500, Christoph Hellwig wrote: > > > This patch causes tesr 014 to take ~ 870 seconds instead of 6, thus > > > beeing almost 150 times slower on mt 32-bit test VM, so I'll have to NAK > > > it for now. > > > > It's not the speculative preallocation changes - ithey are just > > exposing some other regression. That is, using MOUNT_OPTIONS="-o > > allocsize=4k" gives the previous behaviour, while allocsize=512m > > gives the same behaviour as the dynamic preallocation. > > > > The dynamic behaviour is resulting in megabyte sized IOs being > > issued for random 512 byte writes (which is wrong), so I'm tending > > towards it being a regression caused by the reecent writeback path > > changes. I'll dig deeper today. > > Ok, it's not a recent regression - it's the fact that the test is > writing and truncating to random offsets so the file size is > constantly changing resulting in xfs_zero_eof() writing huge amounts > of zeros into preallocated extents beyond EOF. The patch below > explains the situation and the change to the test to avoid > the extended runtime. > > Ultimately, we probably need to change xfs_zero_eof() to allocate > unwritten extents rather than write megabytes of zero for > speculative allocation beyond EOF. However, I'm going to worry about > that when (if) we come across applications that trigger this issue. Your change to test 014 looks good to me, and makes the test take about the same time it did previously. Reviewed-by: Alex Elder > -- > > xfstests: 014 takes forever with large preallocation sizes > > From: Dave Chinner > . . . From SRS0+8jG0+25+fromorbit.com=david@internode.on.net Tue Dec 21 21:45:06 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBM3j5Vq158428 for ; Tue, 21 Dec 2010 21:45:06 -0600 X-ASG-Debug-ID: 1292989620-51fd00910000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 536DE27A0A5 for ; Tue, 21 Dec 2010 19:47:01 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id n8jB10sAZxjQjDVu for ; Tue, 21 Dec 2010 19:47:01 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50189701-1927428 for multiple; Wed, 22 Dec 2010 14:16:59 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVFfG-0002wm-2P; Wed, 22 Dec 2010 14:46:58 +1100 Date: Wed, 22 Dec 2010 14:46:58 +1100 From: Dave Chinner To: Alex Elder Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 03/34] lib: percpu counter add unless less than functionality Subject: Re: [PATCH 03/34] lib: percpu counter add unless less than functionality Message-ID: <20101222034657.GE4907@dastard> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-4-git-send-email-david@fromorbit.com> <1292984414.2408.357.camel@doink> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292984414.2408.357.camel@doink> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1292989623 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0001 1.0000 -2.0205 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50134 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 08:20:14PM -0600, Alex Elder wrote: > On Tue, 2010-12-21 at 18:28 +1100, Dave Chinner wrote: > > From: Dave Chinner > > > > To use the generic percpu counter infrastructure for counters that > > require conditional addition based on a threshold value we need > > special handling of the counter. Further, the caller needs to know > > the status of the conditional addition to determine what action to > > take depending on whether the addition occurred or not. Examples of > > this sort of usage are resource counters that cannot go below zero > > (e.g. filesystem free blocks). > > > > To allow XFS to replace it's complex roll-your-own per-cpu > > superblock counters, a single generic conditional function is > > required: percpu_counter_add_unless_lt(). This will add the amount > > to the counter unless the result would be less than the given > > threshold. A caller supplied threshold is required because XFS does > > not necessarily use the same threshold for every counter. > > > > percpu_counter_add_unless_lt() attempts to minimise counter lock > > traversals by only taking the counter lock when the threshold is > > within the error range of the current counter value. Hence when the > > threshold is not within the counter error range, the counter will > > still have the same scalability characteristics as the normal > > percpu_counter_add() function. > > > > Adding this functionality to the generic percpu counters allows us > > to remove the much more complex and less efficient XFS percpu > > counter code (~700 lines of code) and replace it with generic > > percpu counters. > > > > Signed-off-by: Dave Chinner > > I want to look at this one more closely again in the > morning, but for now I'll just mention one nit, and > one easily fixed problem. > > -Alex > > . . . > > > + * Add @amount to @fdc if and only if result of addition is greater than or > ^^^ should be fbc > > > +EXPORT_SYMBOL(percpu_counter_add_unless_lt); > > + > > This has to be: > EXPORT_SYMBOL(__percpu_counter_add_unless_lt); > (with leading underscores). Yup, saw you comment about that on IRC overnight. Already fixed. ;) Cheers,, Dave. -- Dave Chinner david@fromorbit.com From SRS0+rKX3+25+fromorbit.com=david@internode.on.net Tue Dec 21 21:47:08 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBM3l8JN158833 for ; Tue, 21 Dec 2010 21:47:08 -0600 X-ASG-Debug-ID: 1292989744-1f00038a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DE7DF1CE9967 for ; Tue, 21 Dec 2010 19:49:04 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id RXYMSwLpw2Rnm1h7 for ; Tue, 21 Dec 2010 19:49:04 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 5498294-1927428 for multiple; Wed, 22 Dec 2010 14:19:03 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVFhG-0002ww-Ck; Wed, 22 Dec 2010 14:49:02 +1100 Date: Wed, 22 Dec 2010 14:49:02 +1100 From: Dave Chinner To: Alex Elder Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 20/34] xfs: remove all the inodes on a buffer from the AIL in bulk Subject: Re: [PATCH 20/34] xfs: remove all the inodes on a buffer from the AIL in bulk Message-ID: <20101222034902.GF4907@dastard> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-21-git-send-email-david@fromorbit.com> <1292984446.2408.358.camel@doink> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292984446.2408.358.camel@doink> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292989745 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50133 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 08:20:46PM -0600, Alex Elder wrote: > On Tue, 2010-12-21 at 18:29 +1100, Dave Chinner wrote: > > From: Dave Chinner > > > > When inode buffer IO completes, usually all of the inodes are removed from the > > AIL. This involves processing them one at a time and taking the AIL lock once > > for every inode. When all CPUs are processing inode IO completions, this causes > > excessive amount sof contention on the AIL lock. > > > > Instead, change the way we process inode IO completion in the buffer > > IO done callback. Allow the inode IO done callback to walk the list > > of IO done callbacks and pull all the inodes off the buffer in one > > go and then process them as a batch. > > > > Once all the inodes for removal are collected, take the AIL lock > > once and do a bulk removal operation to minimise traffic on the AIL > > lock. > > > > Signed-off-by: Dave Chinner > > Reviewed-by: Christoph Hellwig > > One question, below. -Alex > > . . . > > > @@ -861,28 +910,37 @@ xfs_iflush_done( > > * the lock since it's cheaper, and then we recheck while > > * holding the lock before removing the inode from the AIL. > > */ > > - if (iip->ili_logged && lip->li_lsn == iip->ili_flush_lsn) { > > + if (need_ail) { > > + struct xfs_log_item *log_items[need_ail]; > > What's the worst-case value of need_ail we might see here? The number of inodes in a cluster. That's 32 for 256 byte inodes with the current 8k cluster size. Cheers, Dave -- Dave Chinner david@fromorbit.com From yad.naveen@gmail.com Tue Dec 21 22:55:47 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_DKIM_INVALID autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBM4tkee170008 for ; Tue, 21 Dec 2010 22:55:47 -0600 X-ASG-Debug-ID: 1292993864-7995010f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qy0-f174.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id B8DDD14721F8 for ; Tue, 21 Dec 2010 20:57:44 -0800 (PST) Received: from mail-qy0-f174.google.com (mail-qy0-f174.google.com [209.85.216.174]) by cuda.sgi.com with ESMTP id xbt6urthUQ1VRuGt for ; Tue, 21 Dec 2010 20:57:44 -0800 (PST) Received: by qyj19 with SMTP id 19so5965194qyj.5 for ; Tue, 21 Dec 2010 20:57:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=48XaDHqB8c+Try5p6di8dx8a15qDxdiQcOEyjE3Z7z4=; b=xjXRPUp/iAfYHqj108UBd3LO7690rAYdLUMTM9rR3SwA3IY31sMx5upBlF4k2Uufa0 q9AJFAzKcB+4Mpdb1lWcN1rxe1noPutCqULXEP1CxaGicl0RxP+gQ4cgC/StJE2VX4oN AthD5VSLDYx7d6mtvKfwlplcTshMOGWb05Rko= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; b=M8fJkYYIPrTd0xCdM8xrCqhvUEBgkq0R4zO71xb3uro/OTa8j5WPxyWcfBlpG1AfrQ SmqiT9R+TJg+ih3JeqvGxQtcVbl7dZ24r3DL2AZuNNauUwcaBkT3YA70us6GLPFETYqR amNmNNg1eGcQWw/AOtQbmV/TRnEXt9AIGAI0I= MIME-Version: 1.0 Received: by 10.229.246.82 with SMTP id lx18mr5474458qcb.248.1292993863432; Tue, 21 Dec 2010 20:57:43 -0800 (PST) Received: by 10.229.75.13 with HTTP; Tue, 21 Dec 2010 20:57:43 -0800 (PST) In-Reply-To: References: <20101221213101.GA4907@dastard> Date: Wed, 22 Dec 2010 10:27:43 +0530 Message-ID: X-ASG-Orig-Subj: Re: Issue on kernel 2.6.35.9 vanilla Subject: Re: Issue on kernel 2.6.35.9 vanilla From: naveen yadav To: Dave Chinner , xfs@oss.sgi.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: mail-qy0-f174.google.com[209.85.216.174] X-Barracuda-Start-Time: 1292993864 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M, DKIM_SIGNED, DKIM_VERIFIED X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50138 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 22, 2010 at 10:27 AM, naveen yadav wrote= : > Hi Dave, > > Please find attached log as suggested by you. > > Kind regards > Naveen > > On Wed, Dec 22, 2010 at 3:01 AM, Dave Chinner wrote= : >> On Tue, Dec 21, 2010 at 07:41:51PM +0530, naveen yadav wrote: >>> Hi all, >>> >>> We have one disk that got corrupted, when I connect to my PC, haveing >>> kernel version(2.6.35.9). >>> The Disk mount well, but when i do 'ls; command it hangs. >> >> ls shouldn't hang. This should return: >> >>> Please find the dmesg. >>> /0x22 [xfs] >>> =A0[] xfs_da_do_buf+0x582/0x628 [xfs] >>> =A0[] ? xfs_da_read_buf+0x1d/0x22 [xfs] >>> =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] >>> =A0[] ? xfs_da_read_buf+0x1d/0x22 [xfs] >>> =A0[] xfs_da_read_buf+0x1d/0x22 [xfs] >>> =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] >>> =A0[] xfs_da_node_lookup_int+0x52/0x207 [xfs] >>> =A0[] xfs_dir2_node_lookup+0x5f/0xee [xfs] >>> =A0[] xfs_dir_lookup+0xde/0x110 [xfs] >>> =A0[] xfs_lookup+0x50/0x9f [xfs] >>> =A0[] xfs_vn_lookup+0x3e/0x76 [xfs] >>> =A0[] do_lookup+0xc9/0x139 >>> =A0[] link_path_walk+0x326/0x44d >>> =A0[] ? default_wake_function+0x10/0x12 >>> =A0[] path_walk+0x3f/0x89 >>> =A0[] ? path_init+0x9e/0x10c >>> =A0[] do_path_lookup+0x26/0x74 >>> =A0[] user_path_at+0x46/0x6c >>> =A0[] ? remove_wait_queue+0x27/0x2c >>> =A0[] ? spin_unlock_irqrestore+0xd/0xf >>> =A0[] ? __wake_up+0x37/0x40 >>> =A0[] vfs_fstatat+0x32/0x59 >>> =A0[] ? fsnotify_modify+0x54/0x5f >>> =A0[] vfs_lstat+0x1b/0x1d >>> =A0[] sys_lstat64+0x19/0x2d >>> =A0[] ? vfs_write+0xb5/0xf4 >>> =A0[] ? audit_syscall_entry+0x12a/0x14c >>> =A0[] ? trace_hardirqs_on_thunk+0xc/0x10 >>> =A0[] sysenter_do_call+0x12/0x2d >>> c2d9d000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff =A0..........= ...... >>> Filesystem "sdb2": XFS internal error xfs_da_do_buf(2) at line 2113 of >>> file fs/xfs/xfs_da_btree.c. =A0Caller 0xe0dfd3ce >> >> an EIO or EUCLEAN error to ls as it encountered a corrupted >> directory block. Can you post the output of: >> >> # echo w > /proc/sysrq-trigger >> >> to show us where it has hung? >> >> Cheers, >> >> Dave. >> >> >> -- >> Dave Chinner >> david@fromorbit.com >> > From amit.sahrawat83@gmail.com Tue Dec 21 23:33:33 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: ** X-Spam-Status: No, score=2.5 required=5.0 tests=BAYES_05,FREEMAIL_FROM, HTML_MESSAGE,T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBM5XWHD176480 for ; Tue, 21 Dec 2010 23:33:32 -0600 X-ASG-Debug-ID: 1292996127-247f00390000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qy0-f181.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CFC3614732AE for ; Tue, 21 Dec 2010 21:35:27 -0800 (PST) Received: from mail-qy0-f181.google.com (mail-qy0-f181.google.com [209.85.216.181]) by cuda.sgi.com with ESMTP id hQ3mjc6iX6UK4Dnn for ; Tue, 21 Dec 2010 21:35:27 -0800 (PST) Received: by qyk12 with SMTP id 12so5146530qyk.5 for ; Tue, 21 Dec 2010 21:35:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=50sQudGbktr3hUfEiHCogJMITzAZ4fCBS0ZJpm13RMw=; b=qv0SGIsReRx20fciD3zF9v/mKOIJzNEod5fL7unX7KuF7qe8Csp46BfxyQpcPQ/F88 8DCk0gUbsdHldk2mnrs2NIgXvPrang375L7OR+bLRv0OkitghGGfdr0I9m3BIhBoWgw2 EN9kVdYyYQsrq1lXgzste0uU8rWa3VibSnE5g= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=WSPuo6QsLNTCAMUJ13ysBuFKFAp2t23e67U407oahQ3oGqPqG0xsd2v6LYFqsix/7F ndf7UV+71iClhCTSiW1UZ078VO0X8C3Tz2rOwPEUhAEb1Fyzc55xopYRChjquw1adXwq 1KMXGytnjp2CjrQwJeWr1cUZby/NVeknsxE/Y= MIME-Version: 1.0 Received: by 10.229.192.144 with SMTP id dq16mr5621225qcb.100.1292996126928; Tue, 21 Dec 2010 21:35:26 -0800 (PST) Received: by 10.220.96.65 with HTTP; Tue, 21 Dec 2010 21:35:26 -0800 (PST) Date: Wed, 22 Dec 2010 11:05:26 +0530 Message-ID: X-ASG-Orig-Subj: XFS hangs Subject: XFS hangs From: Amit Sahrawat To: xfs@oss.sgi.com, Eric Sandeen , Dave Chinner Content-Type: multipart/alternative; boundary=0016363b8030d7758e0497f91e2f X-Barracuda-Connect: mail-qy0-f181.google.com[209.85.216.181] X-Barracuda-Start-Time: 1292996127 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50142 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --0016363b8030d7758e0497f91e2f Content-Type: text/plain; charset=ISO-8859-1 Hi, I am encountering hang of XFS filesystem, please find the logs as given below: INFO: task usb_mount:1858 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. usb_mount D [84a42440] 8032d62c 0 1858 1816 (user thread) Stack : 00000107 00000000 85e7be80 00030002 84a425c8 8032d62c 7fffffff 84a42440 00000002 8496e200 00000001 00000000 85e7bf00 85e7bef8 7fa2f2e0 8032d62c 00000001 801d69a8 85e7bd40 801d6b34 85e7bd4c 8032dc6c 00000000 801dbc80 85e7be80 864315a8 8662c980 00000001 00000742 00000000 00000000 84b85800 85e7bd90 801d6cc0 7fffffff 84a42440 00000002 8032ee74 00000081 804158a0 ... Call Trace: [<8032d574>] __schedule+0x618/0x6b8 from[<8032d62c>] schedule+0x18/0x3c [<8032d62c>] schedule+0x18/0x3c from[<8032dc6c>] schedule_timeout+0x2c/0x1c0 [<8032dc6c>] schedule_timeout+0x2c/0x1c0 from[<8032ee74>] __down+0x8c/0xdc [<8032ee74>] __down+0x8c/0xdc from[<8004500c>] down+0x40/0x88 [<8004500c>] down+0x40/0x88 from[<801ca838>] xfs_buf_lock+0xcc/0x15c [<801ca838>] xfs_buf_lock+0xcc/0x15c from[<801b71a0>] xfs_getsb+0x38/0x54 [<801b71a0>] xfs_getsb+0x38/0x54 from[<801d64a8>] xfs_sync_fsdata+0x7c/0x154 [<801d64a8>] xfs_sync_fsdata+0x7c/0x154 from[<801d7284>] xfs_quiesce_data+0x34/0x60 [<801d7284>] xfs_quiesce_data+0x34/0x60 from[<801d3514>] xfs_fs_sync_fs+0x30/0xec [<801d3514>] xfs_fs_sync_fs+0x30/0xec from[<800ba09c>] __fsync_super+0xa4/0xc8 [<800ba09c>] __fsync_super+0xa4/0xc8 from[<800ba0d4>] fsync_super+0x14/0x28 [<800ba0d4>] fsync_super+0x14/0x28 from[<800ba4a0>] generic_shutdown_super+0x34/0x190 [<800ba4a0>] generic_shutdown_super+0x34/0x190 from[<800ba654>] kill_block_super+0x58/0x80 [<800ba654>] kill_block_super+0x58/0x80 from[<800bac6c>] deactivate_super+0x7c/0x110 [<800bac6c>] deactivate_super+0x7c/0x110 from[<800d2bbc>] sys_umount+0x310/0x358 [<800d2bbc>] sys_umount+0x310/0x358 from[<8000ff44>] stack_done+0x20/0x3c After reboot it works fine, but during this state XFS does not works no operation. Thanks, Amit Sahrawat --0016363b8030d7758e0497f91e2f Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hi,
I am encountering hang of XFS filesystem, please find the logs as give= n below:
INFO: task usb_mount:1858 blocked for more than 120 seconds.
"= echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this mes= sage.
usb_mount=A0=A0=A0=A0=A0=A0=A0 D [84a42440] 8032d62c=A0=A0=A0=A0 0= =A0 1858=A0=A0 1816=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 (user thread)
Stack : 00000107 00000000 85e7be80 00030002 84a425c8 8032d62c 7fffffff 84a4= 2440
=A0=A0=A0=A0=A0=A0=A0 00000002 8496e200 00000001 00000000 85e7bf00 = 85e7bef8 7fa2f2e0 8032d62c
=A0=A0=A0=A0=A0=A0=A0 00000001 801d69a8 85e7b= d40 801d6b34 85e7bd4c 8032dc6c 00000000 801dbc80
=A0=A0=A0=A0=A0=A0=A0 85e7be80 864315a8 8662c980 00000001 00000742 00000000= 00000000 84b85800
=A0=A0=A0=A0=A0=A0=A0 85e7bd90 801d6cc0 7fffffff 84a4= 2440 00000002 8032ee74 00000081 804158a0
=A0=A0=A0=A0=A0=A0=A0 ...
Ca= ll Trace:
[<8032d574>] __schedule+0x618/0x6b8 from[<8032d62c>= ;] schedule+0x18/0x3c
[<8032d62c>] schedule+0x18/0x3c from[<8032dc6c>] schedule_timeo= ut+0x2c/0x1c0
[<8032dc6c>] schedule_timeout+0x2c/0x1c0 from[<80= 32ee74>] __down+0x8c/0xdc
[<8032ee74>] __down+0x8c/0xdc from[&l= t;8004500c>] down+0x40/0x88
[<8004500c>] down+0x40/0x88 from[<801ca838>] xfs_buf_lock+0xcc/= 0x15c
[<801ca838>] xfs_buf_lock+0xcc/0x15c from[<801b71a0>] = xfs_getsb+0x38/0x54
[<801b71a0>] xfs_getsb+0x38/0x54 from[<801d= 64a8>] xfs_sync_fsdata+0x7c/0x154
[<801d64a8>] xfs_sync_fsdata+0x7c/0x154 from[<801d7284>] xfs_qu= iesce_data+0x34/0x60
[<801d7284>] xfs_quiesce_data+0x34/0x60 from[= <801d3514>] xfs_fs_sync_fs+0x30/0xec
[<801d3514>] xfs_fs_syn= c_fs+0x30/0xec from[<800ba09c>] __fsync_super+0xa4/0xc8
[<800ba09c>] __fsync_super+0xa4/0xc8 from[<800ba0d4>] fsync_sup= er+0x14/0x28
[<800ba0d4>] fsync_super+0x14/0x28 from[<800ba4a0&= gt;] generic_shutdown_super+0x34/0x190
[<800ba4a0>] generic_shutdo= wn_super+0x34/0x190 from[<800ba654>] kill_block_super+0x58/0x80
[<800ba654>] kill_block_super+0x58/0x80 from[<800bac6c>] deacti= vate_super+0x7c/0x110
[<800bac6c>] deactivate_super+0x7c/0x110 fro= m[<800d2bbc>] sys_umount+0x310/0x358
[<800d2bbc>] sys_umount= +0x310/0x358 from[<8000ff44>] stack_done+0x20/0x3c
After reboot it works fine, but during this state XFS does not works n= o operation.
=A0
Thanks,
Amit Sahrawat
=A0
--0016363b8030d7758e0497f91e2f-- From SRS0+rKX3+25+fromorbit.com=david@internode.on.net Wed Dec 22 00:01:21 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBM61Kh3183606 for ; Wed, 22 Dec 2010 00:01:21 -0600 X-ASG-Debug-ID: 1292997796-799703780000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8610F147382D for ; Tue, 21 Dec 2010 22:03:16 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id QJGv7ZGrSUyUUaSL for ; Tue, 21 Dec 2010 22:03:16 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 5514184-1927428 for multiple; Wed, 22 Dec 2010 16:33:06 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVHmy-00036g-N3; Wed, 22 Dec 2010 17:03:04 +1100 Date: Wed, 22 Dec 2010 17:02:54 +1100 From: Dave Chinner To: Amit Sahrawat Cc: xfs@oss.sgi.com, Eric Sandeen X-ASG-Orig-Subj: Re: XFS hangs Subject: Re: XFS hangs Message-ID: <20101222060254.GH4907@dastard> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1292997798 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50142 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 22, 2010 at 11:05:26AM +0530, Amit Sahrawat wrote: > Hi, > I am encountering hang of XFS filesystem, please find the logs as given > below: > INFO: task usb_mount:1858 blocked for more than 120 seconds. > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > usb_mount D [84a42440] 8032d62c 0 1858 > 1816 (user thread) > Stack : 00000107 00000000 85e7be80 00030002 84a425c8 8032d62c 7fffffff > 84a42440 > 00000002 8496e200 00000001 00000000 85e7bf00 85e7bef8 7fa2f2e0 > 8032d62c > 00000001 801d69a8 85e7bd40 801d6b34 85e7bd4c 8032dc6c 00000000 > 801dbc80 > 85e7be80 864315a8 8662c980 00000001 00000742 00000000 00000000 > 84b85800 > 85e7bd90 801d6cc0 7fffffff 84a42440 00000002 8032ee74 00000081 > 804158a0 > ... > Call Trace: > [<8032d574>] __schedule+0x618/0x6b8 from[<8032d62c>] schedule+0x18/0x3c > [<8032d62c>] schedule+0x18/0x3c from[<8032dc6c>] schedule_timeout+0x2c/0x1c0 > [<8032dc6c>] schedule_timeout+0x2c/0x1c0 from[<8032ee74>] __down+0x8c/0xdc > [<8032ee74>] __down+0x8c/0xdc from[<8004500c>] down+0x40/0x88 > [<8004500c>] down+0x40/0x88 from[<801ca838>] xfs_buf_lock+0xcc/0x15c > [<801ca838>] xfs_buf_lock+0xcc/0x15c from[<801b71a0>] xfs_getsb+0x38/0x54 > [<801b71a0>] xfs_getsb+0x38/0x54 from[<801d64a8>] xfs_sync_fsdata+0x7c/0x154 > [<801d64a8>] xfs_sync_fsdata+0x7c/0x154 from[<801d7284>] > xfs_quiesce_data+0x34/0x60 > [<801d7284>] xfs_quiesce_data+0x34/0x60 from[<801d3514>] > xfs_fs_sync_fs+0x30/0xec > [<801d3514>] xfs_fs_sync_fs+0x30/0xec from[<800ba09c>] > __fsync_super+0xa4/0xc8 > [<800ba09c>] __fsync_super+0xa4/0xc8 from[<800ba0d4>] fsync_super+0x14/0x28 > [<800ba0d4>] fsync_super+0x14/0x28 from[<800ba4a0>] > generic_shutdown_super+0x34/0x190 > [<800ba4a0>] generic_shutdown_super+0x34/0x190 from[<800ba654>] > kill_block_super+0x58/0x80 > [<800ba654>] kill_block_super+0x58/0x80 from[<800bac6c>] > deactivate_super+0x7c/0x110 > [<800bac6c>] deactivate_super+0x7c/0x110 from[<800d2bbc>] > sys_umount+0x310/0x358 > [<800d2bbc>] sys_umount+0x310/0x358 from[<8000ff44>] stack_done+0x20/0x3c Please make sure you paste stack traces cleanly in your emails so we can read them easily. > After reboot it works fine, but during this state XFS does not works no > operation. What kernel? What did you do to produce the error? What is the output of "echo w > /proc/sysrq-trigger"? Do you have a repeatable test case? What sort of storage are you using? Were there any IO errors before the hang? etc, etc, etc.... -- For future reference, when you are reporting a problem you need to be specific about what you were doing to cause the problem you are reporting. Describe your kernel, your storage, your test case, any errors that occurred before the problem you are reporting, etc. We need this information to make any sense of your bug report, but I'm getting tired of having to ask for it every time you report a problem. The more information you put in your bug report, the more likely we are to be able to help you. We don't have unlimited amounts of time (or patience) to drag all the basic details of your problem out of you over 3 or 4 emails, so including it up front will help a lot.... Cheers, Dave. -- Dave Chinner david@fromorbit.com From amit.sahrawat83@gmail.com Wed Dec 22 00:55:54 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,FREEMAIL_FROM, HTML_MESSAGE,T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBM6tsD5192917 for ; Wed, 22 Dec 2010 00:55:54 -0600 X-ASG-Debug-ID: 1293001071-12d401500000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qw0-f53.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 4093A216010 for ; Tue, 21 Dec 2010 22:57:51 -0800 (PST) Received: from mail-qw0-f53.google.com (mail-qw0-f53.google.com [209.85.216.53]) by cuda.sgi.com with ESMTP id OyMrXI5LDFgJSgzp for ; Tue, 21 Dec 2010 22:57:51 -0800 (PST) Received: by qwe5 with SMTP id 5so5222812qwe.26 for ; Tue, 21 Dec 2010 22:57:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=V73D87RNRSZNVTT8L/MpfsqVgYhBGXReqN7ClFhEB60=; b=HPL8YDkM1eVNrtFidxHQC38XJcCIETUCtVm3L6Txd/mNSQQkdfN3NCs+kpkgBmufLw 1+tUbHac4DnFteNCFNY3Gspf+YCvKrevfaq1Y/n7cp1kUQ40mRGq8nrxuw+FaCHUBZb4 rI4BcX3mYndvC8DiQu+PKx1c45EbfXQOXOcrc= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=opSWrnqpUkS3dSawcdODWX7X4zvPViYUqTfVfUC9Nj8DWAkXFZ/EvxUyTZBa1Ej2ht TQnb3js2ZKnAuSjcbMCgp3gNaMNL1fFwDC8POfI5AcVWMP03nJrm/Sd2m3sG/lnZdg0K iaEXDFDRGzQtVwsswB7GcWMbi+bBaA06tZfXE= MIME-Version: 1.0 Received: by 10.224.69.200 with SMTP id a8mr6067946qaj.190.1293001071117; Tue, 21 Dec 2010 22:57:51 -0800 (PST) Received: by 10.220.96.65 with HTTP; Tue, 21 Dec 2010 22:57:51 -0800 (PST) In-Reply-To: References: <20101222060254.GH4907@dastard> Date: Wed, 22 Dec 2010 12:27:51 +0530 Message-ID: X-ASG-Orig-Subj: Re: XFS hangs Subject: Re: XFS hangs From: Amit Sahrawat To: Dave Chinner Cc: xfs@oss.sgi.com, Eric Sandeen Content-Type: multipart/alternative; boundary=0016e64c0c4e89c6b70497fa4523 X-Barracuda-Connect: mail-qw0-f53.google.com[209.85.216.53] X-Barracuda-Start-Time: 1293001072 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50147 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --0016e64c0c4e89c6b70497fa4523 Content-Type: text/plain; charset=ISO-8859-1 I tried changing the locking in *File :* xfs_sync.c *Function :* int xfs_quiesce_data(struct xfs_mount *mp) /* write superblock and hoover up shutdown errors */ - error = xfs_sync_fsdata(mp, SYNC_WAIT); + error = xfs_sync_fsdata(mp,SYNC_TRYLOCK); This change was just out of curiousity, I am trying to reproduce the hang with this, but didn't observe one in last many iterations. Also, I am looking at possible side effects for the same change. Please let me know about this. To add to this, the code area in doubt according to me: fs/xfs/xfs_buf_item.c Function: void xfs_buf_iodone_callbacks( xfs_buf_t *bp), in this function, XFS_BUF_SET_BRELSE_FUNC(bp,xfs_buf_error_relse); xfs_buf_error_relse is registered as callback, which will unlock the lock held, but I really doubt if the callback is getting called. Still analyzing this code area. Please update me if this is the right direction. Thanks & Regards, Amit Sahrawat On Wed, Dec 22, 2010 at 12:11 PM, Amit Sahrawat wrote: > Extremely sorry for inconvenience, will take care about posting complete > details in future. > > *Test Case : * > cp Complex directory structure(large no of files and directories) to my XFS > formatted partition: > cp -ar /LibExe /usb/sda2 > Unplug the USB while the COPY is in progress. > > *Storage: *USB Flash, USB HDD (Both) > > *Kernel: *2.6.34 > *Target: *MIPS > *LOGS:* > usb 2-1: USB disconnect, address 7 > Device sda2, XFS metadata write error block 0x0 in sda2 > xfs_force_shutdown(sda2,0x1) called from line 1004 of file > fs/xfs/linux-2.6/xfs_buf.c. Return address = 0x801cc294 > Filesystem "sda2": I/O Error Detected. Shutting down filesystem: sda2 > Please umount the filesystem, and rectify the problem(s) > > Plug in USB Port1 > sd 7:0:0:0: [sdb] Attached SCSI disk > Filesystem "sda2": xfs_log_force: error 5 returned. > Filesystem "sda2": xfs_log_force: error 5 returned. > Filesystem "sda2": xfs_log_force: error 5 returned. > Filesystem "sda2": xfs_log_force: error 5 returned. > INFO: task usb_mount:1858 blocked for more than 120 seconds. > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > usb_mount D [84a42440] 8032d62c 0 1858 > 1816 (user thread) > Stack : 00000107 00000000 85e7be80 00030002 84a425c8 8032d62c 7fffffff > 84a42440 > 00000002 8496e200 00000001 00000000 85e7bf00 85e7bef8 7fa2f2e0 > 8032d62c > 00000001 801d69a8 85e7bd40 801d6b34 85e7bd4c 8032dc6c 00000000 > 801dbc80 > 85e7be80 864315a8 8662c980 00000001 00000742 00000000 00000000 > 84b85800 > 85e7bd90 801d6cc0 7fffffff 84a42440 00000002 8032ee74 00000081 > 804158a0 > ... > Call Trace: > [<8032d574>] __schedule+0x618/0x6b8 from[<8032d62c>] schedule+0x18/0x3c > [<8032d62c>] schedule+0x18/0x3c from[<8032dc6c>] > schedule_timeout+0x2c/0x1c0 > [<8032dc6c>] schedule_timeout+0x2c/0x1c0 from[<8032ee74>] __down+0x8c/0xdc > [<8032ee74>] __down+0x8c/0xdc from[<8004500c>] down+0x40/0x88 > [<8004500c>] down+0x40/0x88 from[<801ca838>] xfs_buf_lock+0xcc/0x15c > [<801ca838>] xfs_buf_lock+0xcc/0x15c from[<801b71a0>] xfs_getsb+0x38/0x54 > [<801b71a0>] xfs_getsb+0x38/0x54 from[<801d64a8>] > xfs_sync_fsdata+0x7c/0x154 > [<801d64a8>] xfs_sync_fsdata+0x7c/0x154 from[<801d7284>] > xfs_quiesce_data+0x34/0x60 > [<801d7284>] xfs_quiesce_data+0x34/0x60 from[<801d3514>] > xfs_fs_sync_fs+0x30/0xec > [<801d3514>] xfs_fs_sync_fs+0x30/0xec from[<800ba09c>] > __fsync_super+0xa4/0xc8 > [<800ba09c>] __fsync_super+0xa4/0xc8 from[<800ba0d4>] fsync_super+0x14/0x28 > [<800ba0d4>] fsync_super+0x14/0x28 from[<800ba4a0>] > generic_shutdown_super+0x34/0x190 > [<800ba4a0>] generic_shutdown_super+0x34/0x190 from[<800ba654>] > kill_block_super+0x58/0x80 > [<800ba654>] kill_block_super+0x58/0x80 from[<800bac6c>] > deactivate_super+0x7c/0x110 > [<800bac6c>] deactivate_super+0x7c/0x110 from[<800d2bbc>] > sys_umount+0x310/0x358 > [<800d2bbc>] sys_umount+0x310/0x358 from[<8000ff44>] stack_done+0x20/0x3c > > ------------------------------------------------------------------------------------- > Filesystem "sda2": xfs_log_force: error 5 returned. > > Please let me know in case more information is needed. > > Thanks & Regards, > Amit Sahrawat > On Wed, Dec 22, 2010 at 11:32 AM, Dave Chinner wrote: > >> On Wed, Dec 22, 2010 at 11:05:26AM +0530, Amit Sahrawat wrote: >> > Hi, >> > I am encountering hang of XFS filesystem, please find the logs as given >> > below: >> > INFO: task usb_mount:1858 blocked for more than 120 seconds. >> > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this >> message. >> > usb_mount D [84a42440] 8032d62c 0 1858 >> > 1816 (user thread) >> > Stack : 00000107 00000000 85e7be80 00030002 84a425c8 8032d62c 7fffffff >> > 84a42440 >> > 00000002 8496e200 00000001 00000000 85e7bf00 85e7bef8 7fa2f2e0 >> > 8032d62c >> > 00000001 801d69a8 85e7bd40 801d6b34 85e7bd4c 8032dc6c 00000000 >> > 801dbc80 >> > 85e7be80 864315a8 8662c980 00000001 00000742 00000000 00000000 >> > 84b85800 >> > 85e7bd90 801d6cc0 7fffffff 84a42440 00000002 8032ee74 00000081 >> > 804158a0 >> > ... >> > Call Trace: >> > [<8032d574>] __schedule+0x618/0x6b8 from[<8032d62c>] schedule+0x18/0x3c >> > [<8032d62c>] schedule+0x18/0x3c from[<8032dc6c>] >> schedule_timeout+0x2c/0x1c0 >> > [<8032dc6c>] schedule_timeout+0x2c/0x1c0 from[<8032ee74>] >> __down+0x8c/0xdc >> > [<8032ee74>] __down+0x8c/0xdc from[<8004500c>] down+0x40/0x88 >> > [<8004500c>] down+0x40/0x88 from[<801ca838>] xfs_buf_lock+0xcc/0x15c >> > [<801ca838>] xfs_buf_lock+0xcc/0x15c from[<801b71a0>] >> xfs_getsb+0x38/0x54 >> > [<801b71a0>] xfs_getsb+0x38/0x54 from[<801d64a8>] >> xfs_sync_fsdata+0x7c/0x154 >> > [<801d64a8>] xfs_sync_fsdata+0x7c/0x154 from[<801d7284>] >> > xfs_quiesce_data+0x34/0x60 >> > [<801d7284>] xfs_quiesce_data+0x34/0x60 from[<801d3514>] >> > xfs_fs_sync_fs+0x30/0xec >> > [<801d3514>] xfs_fs_sync_fs+0x30/0xec from[<800ba09c>] >> > __fsync_super+0xa4/0xc8 >> > [<800ba09c>] __fsync_super+0xa4/0xc8 from[<800ba0d4>] >> fsync_super+0x14/0x28 >> > [<800ba0d4>] fsync_super+0x14/0x28 from[<800ba4a0>] >> > generic_shutdown_super+0x34/0x190 >> > [<800ba4a0>] generic_shutdown_super+0x34/0x190 from[<800ba654>] >> > kill_block_super+0x58/0x80 >> > [<800ba654>] kill_block_super+0x58/0x80 from[<800bac6c>] >> > deactivate_super+0x7c/0x110 >> > [<800bac6c>] deactivate_super+0x7c/0x110 from[<800d2bbc>] >> > sys_umount+0x310/0x358 >> > [<800d2bbc>] sys_umount+0x310/0x358 from[<8000ff44>] >> stack_done+0x20/0x3c >> >> Please make sure you paste stack traces cleanly in your emails so we >> can read them easily. >> -- >> > After reboot it works fine, but during this state XFS does not works no >> > operation. >> >> What kernel? What did you do to produce the error? What is the output >> of "echo w > /proc/sysrq-trigger"? Do you have a repeatable test >> case? What sort of storage are you using? Were there any IO errors >> before the hang? etc, etc, etc.... >> >> -- >> >> For future reference, when you are reporting a problem you need to >> be specific about what you were doing to cause the problem you are >> reporting. Describe your kernel, your storage, your test case, any >> errors that occurred before the problem you are reporting, etc. >> >> We need this information to make any sense of your bug report, but >> I'm getting tired of having to ask for it every time you report a >> problem. The more information you put in your bug report, the more >> likely we are to be able to help you. We don't have unlimited >> amounts of time (or patience) to drag all the basic details of your >> problem out of you over 3 or 4 emails, so including it up front will >> help a lot.... >> >> Cheers, >> >> Dave. >> -- >> Dave Chinner >> david@fromorbit.com >> > > --0016e64c0c4e89c6b70497fa4523 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
I tried changing the locking in
=A0
File : xfs_sync.c
Function : int xfs_quiesce_data(struct xfs_mount=A0*m= p)
=A0/* write superblock and hoover up shutdown errors */
- =A0error = =3D xfs_sync_fsdata(mp, SYNC_WAIT);
+ error =3D xfs_sync_fsdata(mp,SYNC_= TRYLOCK);
=A0
This change was just out of curiousity, I am trying to reproduce the h= ang with this, but didn't observe one in last many iterations.
Also, I am looking at possible side effects for the same change. Pleas= e let me know about this.
=A0
To add to this, the code area in doubt according to me:
fs/xfs/xfs_buf_item.c
Function: void xfs_buf_iodone_callbacks(=A0xfs_buf_t=A0*bp), in this f= unction,
=A0XFS_BUF_SET_BRELSE_FUNC(bp,xfs_buf_error_relse); xfs_buf_error_rels= e is registered as callback, which will unlock the lock held, but I really = doubt if the callback is getting called. Still analyzing this code area.
=A0
Please update me if this is the right direction.
=A0
Thanks & Regards,
Amit Sahrawat
=A0


=A0
On Wed, Dec 22, 2010 at 12:11 PM, Amit Sahrawat = <amit.sah= rawat83@gmail.com> wrote:
Extremely sorry for inconvenience, will take care about posting comple= te details in future.
=A0
Test Case :
cp Complex directory structure(large no of files and directories)=A0to= my XFS formatted partition:
cp -ar /LibExe /usb/sda2
Unplug the USB while the COPY is in progress.
=A0
Storage: USB Flash, USB HDD (Both)
=A0
Kernel: 2.6.34
Target: MIPS
LOGS:
usb 2-1: USB disconnect, address 7
Device sda2, XFS metadata write = error block 0x0 in sda2
xfs_force_shutdown(sda2,0x1) called from line 10= 04 of file fs/xfs/linux-2.6/xfs_buf.c.=A0 Return address =3D 0x801cc294
Filesystem "sda2": I/O Error Detected.=A0 Shutting down filesyste= m: sda2
Please umount the filesystem, and rectify the problem(s)
=A0
Plug in USB Port1
sd 7:0:0:0: [sdb] Attached SCSI disk
Filesystem "sda2": xfs_log_force: error 5 returned.
Filesystem "sda2": xfs_log_force: error 5 returned.
Files= ystem "sda2": xfs_log_force: error 5 returned.
Filesystem "sda2": xfs_log_force: error 5 returned.
INFO: task usb_mount:1858 blocked for more than 120 seconds.
"= echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this mes= sage.
usb_mount=A0=A0=A0=A0=A0=A0=A0 D [84a42440] 8032d62c=A0=A0=A0=A0 0= =A0 1858=A0=A0 1816=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 (user thread)
Stack : 00000107 00000000 85e7be80 00030002 84a425c8 8032d62c 7fffffff 84a4= 2440
=A0=A0=A0=A0=A0=A0=A0 00000002 8496e200 00000001 00000000 85e7bf00 = 85e7bef8 7fa2f2e0 8032d62c
=A0=A0=A0=A0=A0=A0=A0 00000001 801d69a8 85e7b= d40 801d6b34 85e7bd4c 8032dc6c 00000000 801dbc80
=A0=A0=A0=A0=A0=A0=A0 85e7be80 864315a8 8662c980 00000001 00000742 00000000= 00000000 84b85800
=A0=A0=A0=A0=A0=A0=A0 85e7bd90 801d6cc0 7fffffff 84a4= 2440 00000002 8032ee74 00000081 804158a0
=A0=A0=A0=A0=A0=A0=A0 ...
Ca= ll Trace:
[<8032d574>] __schedule+0x618/0x6b8 from[<8032d62c>= ;] schedule+0x18/0x3c
[<8032d62c>] schedule+0x18/0x3c from[<8032dc6c>] schedule_timeo= ut+0x2c/0x1c0
[<8032dc6c>] schedule_timeout+0x2c/0x1c0 from[<80= 32ee74>] __down+0x8c/0xdc
[<8032ee74>] __down+0x8c/0xdc from[&l= t;8004500c>] down+0x40/0x88
[<8004500c>] down+0x40/0x88 from[<801ca838>] xfs_buf_lock+0xcc/= 0x15c
[<801ca838>] xfs_buf_lock+0xcc/0x15c from[<801b71a0>] = xfs_getsb+0x38/0x54
[<801b71a0>] xfs_getsb+0x38/0x54 from[<801d= 64a8>] xfs_sync_fsdata+0x7c/0x154
[<801d64a8>] xfs_sync_fsdata+0x7c/0x154 from[<801d7284>] xfs_qu= iesce_data+0x34/0x60
[<801d7284>] xfs_quiesce_data+0x34/0x60 from[= <801d3514>] xfs_fs_sync_fs+0x30/0xec
[<801d3514>] xfs_fs_syn= c_fs+0x30/0xec from[<800ba09c>] __fsync_super+0xa4/0xc8
[<800ba09c>] __fsync_super+0xa4/0xc8 from[<800ba0d4>] fsync_sup= er+0x14/0x28
[<800ba0d4>] fsync_super+0x14/0x28 from[<800ba4a0&= gt;] generic_shutdown_super+0x34/0x190
[<800ba4a0>] generic_shutdo= wn_super+0x34/0x190 from[<800ba654>] kill_block_super+0x58/0x80
[<800ba654>] kill_block_super+0x58/0x80 from[<800bac6c>] deacti= vate_super+0x7c/0x110
[<800bac6c>] deactivate_super+0x7c/0x110 fro= m[<800d2bbc>] sys_umount+0x310/0x358
[<800d2bbc>] sys_umount= +0x310/0x358 from[<8000ff44>] stack_done+0x20/0x3c
----------------------------------------------------------------------= ---------------
Filesystem "sda2": xfs_log_force: error 5 retu= rned.

Please let me know in case more information is needed.
=A0
Thanks & Regards,
Amit Sahrawat
On Wed, Dec 22, 2010 at 11:32 AM, Dave Chinner <= span dir=3D"ltr"><david@fromorbit.com> wrote:
On Wed, Dec 22, 2010 at 11:05:26AM +0530, Amit Sahrawat wrote:
>= Hi,
> I am encountering hang of XFS filesystem, please find the logs= as given
> below:
> INFO: task usb_mount:1858 blocked for more= than 120 seconds.
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disabl= es this message.
> usb_mount =A0 =A0 =A0 =A0D [84a42440] 8032d62c =A0= =A0 0 =A01858
> 1816 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0= =A0 =A0 (user thread)
> Stack : 00000107 00000000 85e7be80 00030002 = 84a425c8 8032d62c 7fffffff
> 84a42440
> =A0 =A0 =A0 =A0 00000002 8496e200 00000001 00000000 8= 5e7bf00 85e7bef8 7fa2f2e0
> 8032d62c
> =A0 =A0 =A0 =A0 00000001= 801d69a8 85e7bd40 801d6b34 85e7bd4c 8032dc6c 00000000
> 801dbc80
= > =A0 =A0 =A0 =A0 85e7be80 864315a8 8662c980 00000001 00000742 00000000 = 00000000
> 84b85800
> =A0 =A0 =A0 =A0 85e7bd90 801d6cc0 7fffffff 84a42440 0= 0000002 8032ee74 00000081
> 804158a0
> =A0 =A0 =A0 =A0 ...
&= gt; Call Trace:
> [<8032d574>] __schedule+0x618/0x6b8 from[<= 8032d62c>] schedule+0x18/0x3c
> [<8032d62c>] schedule+0x18/0x3c from[<8032dc6c>] schedule_= timeout+0x2c/0x1c0
> [<8032dc6c>] schedule_timeout+0x2c/0x1c0 f= rom[<8032ee74>] __down+0x8c/0xdc
> [<8032ee74>] __down+0x= 8c/0xdc from[<8004500c>] down+0x40/0x88
> [<8004500c>] down+0x40/0x88 from[<801ca838>] xfs_buf_lock+= 0xcc/0x15c
> [<801ca838>] xfs_buf_lock+0xcc/0x15c from[<801b= 71a0>] xfs_getsb+0x38/0x54
> [<801b71a0>] xfs_getsb+0x38/0x5= 4 from[<801d64a8>] xfs_sync_fsdata+0x7c/0x154
> [<801d64a8>] xfs_sync_fsdata+0x7c/0x154 from[<801d7284>]> xfs_quiesce_data+0x34/0x60
> [<801d7284>] xfs_quiesce_da= ta+0x34/0x60 from[<801d3514>]
> xfs_fs_sync_fs+0x30/0xec
> [<801d3514>] xfs_fs_sync_fs+0x30/0xec from[<800ba09c>]
= > __fsync_super+0xa4/0xc8
> [<800ba09c>] __fsync_super+0xa4/= 0xc8 from[<800ba0d4>] fsync_super+0x14/0x28
> [<800ba0d4>= ] fsync_super+0x14/0x28 from[<800ba4a0>]
> generic_shutdown_super+0x34/0x190
> [<800ba4a0>] generic_s= hutdown_super+0x34/0x190 from[<800ba654>]
> kill_block_super+0x= 58/0x80
> [<800ba654>] kill_block_super+0x58/0x80 from[<800b= ac6c>]
> deactivate_super+0x7c/0x110
> [<800bac6c>] deactivate_supe= r+0x7c/0x110 from[<800d2bbc>]
> sys_umount+0x310/0x358
> = [<800d2bbc>] sys_umount+0x310/0x358 from[<8000ff44>] stack_done= +0x20/0x3c

Please make sure you paste stack traces cleanly in your ema= ils so we
can read them easily.
--
> After reboot it works fine, but during this state XFS does = not works no
> operation.

What kernel? What did you do t= o produce the error? What is the output
of "echo w > /proc/sysrq= -trigger"? Do you have a repeatable test
case? What sort of storage are you using? Were there any IO errors
befor= e the hang? etc, etc, etc....

--

For future reference, when y= ou are reporting a problem you need to
be specific about what you were d= oing to cause the problem you are
reporting. =A0Describe your kernel, your storage, your test case, any
er= rors that occurred before the problem you are reporting, etc.

We nee= d this information to make any sense of your bug report, but
I'm get= ting tired of having to ask for it every time you report a
problem. The more information you put in your bug report, the more
likel= y we are to be able to help you. We don't have unlimited
amounts of = time (or patience) to drag all the basic details of your
problem out of = you over 3 or 4 emails, so including it up front will
help a lot....

Cheers,

Dave.
--Dave Chinner
d= avid@fromorbit.com


--0016e64c0c4e89c6b70497fa4523-- From yad.naveen@gmail.com Wed Dec 22 00:58:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_DKIM_INVALID autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBM6wE5Q193349 for ; Wed, 22 Dec 2010 00:58:15 -0600 X-ASG-Debug-ID: 1293001211-3ba501780000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qy0-f181.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 710F31473A88 for ; Tue, 21 Dec 2010 23:00:11 -0800 (PST) Received: from mail-qy0-f181.google.com (mail-qy0-f181.google.com [209.85.216.181]) by cuda.sgi.com with ESMTP id of9QGWJhHk45i3EZ for ; Tue, 21 Dec 2010 23:00:11 -0800 (PST) Received: by qyk12 with SMTP id 12so5201210qyk.5 for ; Tue, 21 Dec 2010 23:00:11 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type; bh=3VdFA9E/Vq4LYVTqumCJuew+4OP09ASMhjBMAiv5Vw8=; b=O7o54Xtn87s6RuwvQ3VhgigVlmvJwpi+rYGqoDUAQLims5udIRtirMzA8Ujh82LchK +Lkn/hbQBwKC6wV2+Z3GfybllClYWSaJMlNgXC78GC7ZQ5t8YzfSJoRGKqRMLeAqZd39 OdOJXgC6n8iQ8/2NomCu+fb6bf/mGBsU4C3VM= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type; b=MUwB+aQPB+2PWHUhTHIAW//OlfFk1Hkcl0QCSTaT9Eiq98AKEO2uaMiqFYk+lzkwFu NasKSKbq7nZMxbEp2XPs6NrdX+ZoqEukMwpOEFOaQKAG4H7elSWgaV9+jxoTejSToxHk n9r00VaXvjF8Pbi32FI6cE7BauuGV4RRD161I= MIME-Version: 1.0 Received: by 10.229.213.211 with SMTP id gx19mr5682281qcb.172.1293001211158; Tue, 21 Dec 2010 23:00:11 -0800 (PST) Received: by 10.229.75.13 with HTTP; Tue, 21 Dec 2010 23:00:11 -0800 (PST) In-Reply-To: <20101222053730.GG4907@dastard> References: <20101221213101.GA4907@dastard> <20101222053730.GG4907@dastard> Date: Wed, 22 Dec 2010 12:30:11 +0530 Message-ID: X-ASG-Orig-Subj: Re: Issue on kernel 2.6.35.9 vanilla Subject: Re: Issue on kernel 2.6.35.9 vanilla From: naveen yadav To: Dave Chinner , xfs@oss.sgi.com Content-Type: multipart/mixed; boundary=0016362842eae2a29f0497fa4d18 X-Barracuda-Connect: mail-qy0-f181.google.com[209.85.216.181] X-Barracuda-Start-Time: 1293001212 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M, DKIM_SIGNED, DKIM_VERIFIED X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50146 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --0016362842eae2a29f0497fa4d18 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Thanks a lot Dave, Please find attached log for command xfs_repair -n. Thanks a lot On Wed, Dec 22, 2010 at 11:07 AM, Dave Chinner wrote: > On Wed, Dec 22, 2010 at 10:27:16AM +0530, naveen yadav wrote: >> Hi Dave, >> >> Please find attached log as suggested by you. >> >> Kind regards >> Naveen >> >> On Wed, Dec 22, 2010 at 3:01 AM, Dave Chinner wrot= e: >> > On Tue, Dec 21, 2010 at 07:41:51PM +0530, naveen yadav wrote: >> >> Hi all, >> >> >> >> We have one disk that got corrupted, when I connect to my PC, haveing >> >> kernel version(2.6.35.9). >> >> The Disk mount well, but when i do 'ls; command it hangs. >> > >> > ls shouldn't hang. This should return: >> > >> >> Please find the dmesg. >> >> /0x22 [xfs] >> >> =A0[] xfs_da_do_buf+0x582/0x628 [xfs] >> >> =A0[] ? xfs_da_read_buf+0x1d/0x22 [xfs] >> >> =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] >> >> =A0[] ? xfs_da_read_buf+0x1d/0x22 [xfs] >> >> =A0[] xfs_da_read_buf+0x1d/0x22 [xfs] >> >> =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] >> >> =A0[] xfs_da_node_lookup_int+0x52/0x207 [xfs] > ..... >> >> c2d9d000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff =A0........= ........ >> >> Filesystem "sdb2": XFS internal error xfs_da_do_buf(2) at line 2113 o= f >> >> file fs/xfs/xfs_da_btree.c. =A0Caller 0xe0dfd3ce > > This is not in your dmesg log. When did it actually happen? Before > the hung task timer started to trip? From your log: > > scsi 5:0:0:0: Direct-Access =A0 =A0 SanDisk =A0Cruzer Blade =A0 =A0 1.00 = PQ: 0 ANSI: 2 > sd 5:0:0:0: Attached scsi generic sg1 type 0 > sd 5:0:0:0: [sdb] 15625216 512-byte logical blocks: (8.00 GB/7.45 GiB) > sd 5:0:0:0: [sdb] Write Protect is off > sd 5:0:0:0: [sdb] Mode Sense: 03 00 00 00 > sd 5:0:0:0: [sdb] Assuming drive cache: write through > sd 5:0:0:0: [sdb] Assuming drive cache: write through > =A0sdb: sdb1 sdb2 > sd 5:0:0:0: [sdb] Assuming drive cache: write through > sd 5:0:0:0: [sdb] Attached SCSI removable disk > SELinux: initialized (dev sdb1, type vfat), uses genfs_contexts > XFS mounting filesystem sdb2 > Starting XFS recovery on filesystem: sdb2 (logdev: internal) > Ending XFS recovery on filesystem: sdb2 (logdev: internal) > SELinux: initialized (dev sdb2, type xfs), uses xattr > INFO: task gvfs-gdu-volume:2311 blocked for more than 120 seconds. > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > gvfs-gdu-volu D 00000026 =A0 =A0 0 =A02311 =A0 =A0 =A01 0x00000080 > =A0c6cf9b2c 00000086 a41cc623 00000026 c0a25e00 c0a25e00 c0a25e00 c0a25e0= 0 > =A0d1290f54 c0a25e00 c0a25e00 000336ad 00000000 cd871c00 00000026 d1290cd= 0 > =A000000000 cd8d2a08 cd8d2a00 7fffffff 7fffffff c6cf9b70 c0781c43 0000000= 0 > Call Trace: > =A0[] schedule_timeout+0x1b/0x95 > =A0[] __down_common+0x82/0xb9 > =A0[] ? _xfs_buf_find+0x122/0x1b8 [xfs] > =A0[] __down+0x17/0x19 > =A0[] down+0x27/0x37 > =A0[] xfs_buf_lock+0x67/0x93 [xfs] > =A0[] _xfs_buf_find+0x122/0x1b8 [xfs] > =A0[] xfs_buf_get+0x60/0x149 [xfs] > =A0[] xfs_buf_read+0x22/0xb0 [xfs] > =A0[] xfs_trans_read_buf+0x53/0x2e9 [xfs] > =A0[] xfs_da_do_buf+0x411/0x628 [xfs] > =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] > =A0[] xfs_da_read_buf+0x1d/0x22 [xfs] > =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] > =A0[] xfs_da_node_lookup_int+0x52/0x207 [xfs] > =A0[] xfs_dir2_node_lookup+0x5f/0xee [xfs] > =A0[] xfs_dir_lookup+0xde/0x110 [xfs] > =A0[] xfs_lookup+0x50/0x9f [xfs] > =A0[] xfs_vn_lookup+0x3e/0x76 [xfs] > =A0[] do_lookup+0xc9/0x139 > =A0[] do_last+0x186/0x49f > =A0[] do_filp_open+0x1bd/0x459 > =A0[] ? timekeeping_get_ns+0x16/0x54 > =A0[] ? might_fault+0x1e/0x20 > =A0[] ? alloc_fd+0x58/0xbe > =A0[] do_sys_open+0x4d/0xe4 > =A0[] ? audit_syscall_entry+0x12a/0x14c > =A0[] sys_open+0x23/0x2b > =A0[] sysenter_do_call+0x12/0x2d > > You've got a gvfs (gnome-vfs?) process stuck waiting on a buffer > lock. The onyl way I can see it getting stuck here is if it the > buffer has not been unlocked somewhere. It's possible that it is > stuck on the same buffer that the corruption error came from, > but the corrupted buffer is unlocked in the error handling path. > what does `xfs_repair -n` tell about the filesytsem? > > FWIW, later on: > > ...... > INFO: task gvfsd-trash:1891 blocked for more than 120 seconds. > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > gvfsd-trash =A0 D 00000026 =A0 =A0 0 =A01891 =A0 =A0 =A01 0x00000080 > > gvfs-trashd gets stuck on a mutex during a path walk which is > probably held by the above directory read. > > .... > INFO: task gvfs-gdu-volume:2321 blocked for more than 120 seconds. > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. > gvfs-gdu-volu D 00000026 =A0 =A0 0 =A02321 =A0 =A0 =A01 0x00000088 > > As does this one. > > .... > > gvfs-gdu-volu D 00000026 =A0 =A0 0 =A01889 =A0 =A0 =A01 0x00000080 > =A0cda3df10 00000086 a422923c 00000026 c0a25e00 c0a25e00 c0a25e00 c0a25e0= 0 > =A0cd936904 c0a25e00 c0a25e00 000b9ea1 00000000 cda24400 00000026 cd93668= 0 > =A000ae3000 c34c01a4 c34c019c cd936680 c34c01a0 cda3df44 c0782093 c34c01a= c > Call Trace: > =A0[] __mutex_lock_common+0xe8/0x137 > =A0[] __mutex_lock_killable_slowpath+0x17/0x19 > =A0[] ? mutex_lock_killable+0x32/0x45 > =A0[] mutex_lock_killable+0x32/0x45 > =A0[] vfs_readdir+0x46/0x94 > =A0[] ? filldir64+0x0/0xf5 > =A0[] sys_getdents64+0x72/0xb2 > =A0[] sysenter_do_call+0x12/0x2d > > And this one, too. > > ..... > ls =A0 =A0 =A0 =A0 =A0 =A0D 00000000 =A0 =A0 0 =A02325 =A0 2044 0x0000008= 0 > =A0c6d03f10 00200086 00000000 00000000 c0a25e00 c0a25e00 c0a25e00 c0a25e0= 0 > =A0cdacb5c4 c0a25e00 c0a25e00 d6779fa1 00000029 00000000 00000029 cdacb34= 0 > =A000000001 c34c01a4 c34c019c cdacb340 c34c01a0 c6d03f44 c0782093 c34c01a= c > Call Trace: > =A0[] __mutex_lock_common+0xe8/0x137 > =A0[] __mutex_lock_killable_slowpath+0x17/0x19 > =A0[] ? mutex_lock_killable+0x32/0x45 > =A0[] mutex_lock_killable+0x32/0x45 > =A0[] vfs_readdir+0x46/0x94 > =A0[] ? filldir64+0x0/0xf5 > =A0[] sys_getdents64+0x72/0xb2 > =A0[] sysenter_do_call+0x12/0x2d > > And finally, there is an ls process that is hung, stuck on a > directory mutex. Is this the one you were seeing hang rather than > whatever generated the corrupion report? > > Cheers, > > Dave. > -- > Dave Chinner > david@fromorbit.com > --0016362842eae2a29f0497fa4d18 Content-Type: application/octet-stream; name=xfs_repair_log Content-Disposition: attachment; filename=xfs_repair_log Content-Transfer-Encoding: base64 X-Attachment-Id: f_ghzvhpxz0 UGhhc2UgMSAtIGZpbmQgYW5kIHZlcmlmeSBzdXBlcmJsb2NrLi4uClBoYXNlIDIgLSB1c2luZyBp bnRlcm5hbCBsb2cKICAgICAgICAtIHNjYW4gZmlsZXN5c3RlbSBmcmVlc3BhY2UgYW5kIGlub2Rl IG1hcHMuLi4Kc2JfaWNvdW50IDY0LCBjb3VudGVkIDI1NgpzYl9pZnJlZSA1NiwgY291bnRlZCA0 OQpzYl9mZGJsb2NrcyAxNDE4OTg3LCBjb3VudGVkIDE0MjUyNDEKICAgICAgICAtIGZvdW5kIHJv b3QgaW5vZGUgY2h1bmsKUGhhc2UgMyAtIGZvciBlYWNoIEFHLi4uCiAgICAgICAgLSBzY2FuIChi dXQgZG9uJ3QgY2xlYXIpIGFnaSB1bmxpbmtlZCBsaXN0cy4uLgogICAgICAgIC0gcHJvY2VzcyBr bm93biBpbm9kZXMgYW5kIHBlcmZvcm0gaW5vZGUgZGlzY292ZXJ5Li4uCiAgICAgICAgLSBhZ25v ID0gMApiYWQgZGlyIG1hZ2ljIG51bWJlciAweGQyZjEgaW4gaW5vZGUgMTI4IGJubyA9IDgzODg2 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ESMTP id oF5lZBFcNO6s0AUa for ; Wed, 22 Dec 2010 00:04:59 -0800 (PST) Received: from mailsrv.i.zmi.at (h081217106033.dyn.cm.kabsi.at [81.217.106.33]) (using TLSv1 with cipher DHE-RSA-CAMELLIA256-SHA (256/256 bits)) (Client CN "mailsrv2.i.zmi.at", Issuer "power4u.zmi.at" (not verified)) by mailsrv14.zmi.at (Postfix) with ESMTPSA id 38991400; Wed, 22 Dec 2010 09:04:58 +0100 (CET) Received: from saturn.localnet (saturn.i.zmi.at [10.72.27.2]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mailsrv.i.zmi.at (Postfix) with ESMTPSA id 3F8AB401C3E; Wed, 22 Dec 2010 09:04:57 +0100 (CET) From: Michael Monnerie Organization: it-management http://it-management.at To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: XFS hangs Subject: Re: XFS hangs Date: Wed, 22 Dec 2010 09:04:56 +0100 User-Agent: KMail/1.13.5 (Linux/2.6.37-rc6-zmi; KDE/4.4.4; x86_64; ; ) Cc: Dave Chinner , Amit Sahrawat , Eric Sandeen References: <20101222060254.GH4907@dastard> 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Content-Type: Text/Plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable On Mittwoch, 22. Dezember 2010 Dave Chinner wrote: > For future reference, when you are reporting a problem you need to > be specific about what you were doing to cause the problem you are > reporting. Describe your kernel, your storage, your test case, any > errors that occurred before the problem you are reporting, etc. >=20 > We need this information to make any sense of your bug report, but > I'm getting tired of having to ask for it every time you report a > problem. The more information you put in your bug report, the more > likely we are to be able to help you. We don't have unlimited > amounts of time (or patience) to drag all the basic details of your > problem out of you over 3 or 4 emails, so including it up front will > help a lot.... Should I update this section? http://xfs.org/index.php/XFS_FAQ#Q:_What_information_should_I_include_when_= reporting_a_problem.3F We should probably just send that link to people so you don't have to=20 write long texts all the time. Maybe above section should be updated to: Things to include are what version of XFS you are using and version of=20 the kernel. If you have problems with userland packages please report=20 the version of the package you are using. If the problem relates to a particular filesystem, the output from the=20 xfs_info(8) command and any mount(8) options in use will also be useful=20 to the developers. If you experience an oops, please run it through ksymoops so that it can=20 be interpreted. Also describe what you were doing, if you can repeat it,=20 and describe you kernel, storage, test case, if there was a hardware=20 problem before, etc. If you have a filesystem that cannot be repaired, make sure you have=20 xfsprogs 3.1.x or later and run xfs_metadump(8) to capture the metadata=20 (which obfuscates filenames and attributes to protect your privacy) and=20 make the dump available for someone to analyse.=20 =2D-=20 mit freundlichen Gr=FCssen, Michael Monnerie, Ing. BSc it-management Internet Services: Prot=E9ger http://proteger.at [gesprochen: Prot-e-schee] Tel: +43 660 / 415 6531 // ****** Radiointerview zum Thema Spam ****** // http://www.it-podcast.at/archiv.html#podcast-100716 //=20 // Haus zu verkaufen: http://zmi.at/langegg/ --nextPart2388745.nWRAbCaOEZ Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.15 (GNU/Linux) iEYEABECAAYFAk0RsSgACgkQzhSR9xwSCbSALQCfQnX6mVVFVcPWbPMsZRgj2mU0 0UwAn1EL03pnMs6KxzVr+z1ztu40xOXP =oz/Z -----END PGP SIGNATURE----- --nextPart2388745.nWRAbCaOEZ-- From amit.sahrawat83@gmail.com Wed Dec 22 03:10:09 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,FREEMAIL_FROM, HTML_MESSAGE,T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBM9A8qi210107 for ; Wed, 22 Dec 2010 03:10:08 -0600 X-ASG-Debug-ID: 1293009124-267a02960000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qy0-f174.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E20161473F5D for ; Wed, 22 Dec 2010 01:12:04 -0800 (PST) Received: from mail-qy0-f174.google.com (mail-qy0-f174.google.com [209.85.216.174]) by cuda.sgi.com with ESMTP id YFb2HIzmuDXiZHrg for ; Wed, 22 Dec 2010 01:12:04 -0800 (PST) Received: by qyj19 with SMTP id 19so6138359qyj.5 for ; Wed, 22 Dec 2010 01:12:03 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=Kj7nKetBxY0yhm452aazhNtHKpRHX875ljclKd5s8CY=; b=nB0HDr/fhNj5DMLfIpBoWvhUW5JsQWFq2tfemCv1QuvqTbZak5Wmr4kx8IyLNfzNnw JWEkW7o6qmccoexXDpU9F4WAlCcm97d5iaKMQnhs3r4Z0pqafJNvbQt922UABe0qRpRX FaMEQ5vt1R/hrZRf6Bkpo4YdUIFi4E2m8ehyw= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=xZAS2Pod1D+ZjI7COgyvh1enmycJn75N8KCuUAIXtPqT193k1HogMMpwLqPlv7yndN 97xMlVTYTNE0g3gDTPqwhitj4FAeMd6keFT6L289rr81r4xWYXquRFP/iNJuDacErV9K I5VBQhmG4ky/uC1/pXRc8I7E5o4NJcjgKWI/I= MIME-Version: 1.0 Received: by 10.224.19.199 with SMTP id c7mr6213101qab.140.1293009123333; Wed, 22 Dec 2010 01:12:03 -0800 (PST) Received: by 10.220.96.65 with HTTP; Wed, 22 Dec 2010 01:12:03 -0800 (PST) In-Reply-To: <201012220904.56914@zmi.at> References: <20101222060254.GH4907@dastard> <201012220904.56914@zmi.at> Date: Wed, 22 Dec 2010 14:42:03 +0530 Message-ID: X-ASG-Orig-Subj: Re: XFS hangs Subject: Re: XFS hangs From: Amit Sahrawat To: Michael Monnerie Cc: xfs@oss.sgi.com, Dave Chinner , Eric Sandeen Content-Type: multipart/alternative; boundary=0015175cb07e7cd73e0497fc2586 X-Barracuda-Connect: mail-qy0-f174.google.com[209.85.216.174] X-Barracuda-Start-Time: 1293009124 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA085, DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50156 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message 0.10 BSF_SC0_SA085 Custom Rule SA085 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --0015175cb07e7cd73e0497fc2586 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hi, There seems to be a problem in posting - I already apologized and provided complete details. I guess this was the first time, i missed on providing th= e test case. Please refer my earlier post on the same issue: Extremely sorry for inconvenience, will take care about posting complete details in future. Test Case : cp Complex directory structure(large no of files and directories) to my XFS formatted partition: cp -ar /LibExe /usb/sda2 Unplug the USB while the COPY is in progress. Storage: USB Flash, USB HDD (Both) Kernel: 2.6.34 Target: MIPS LOGS: usb 2-1: USB disconnect, address 7 Device sda2, XFS metadata write error block 0x0 in sda2 xfs_force_shutdown(sda2,0x1) called from line 1004 of file fs/xfs/linux-2.6/xfs_buf.c. Return address =3D 0x801cc294 Filesystem "sda2": I/O Error Detected. Shutting down filesystem: sda2 Please umount the filesystem, and rectify the problem(s) Plug in USB Port1 sd 7:0:0:0: [sdb] Attached SCSI disk Filesystem "sda2": xfs_log_force: error 5 returned. Filesystem "sda2": xfs_log_force: error 5 returned. Filesystem "sda2": xfs_log_force: error 5 returned. Filesystem "sda2": xfs_log_force: error 5 returned. - Show quoted text - INFO: task usb_mount:1858 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. usb_mount D [84a42440] 8032d62c 0 1858 1816 (user thread) Stack : 00000107 00000000 85e7be80 00030002 84a425c8 8032d62c 7fffffff 84a42440 00000002 8496e200 00000001 00000000 85e7bf00 85e7bef8 7fa2f2e0 8032d62c 00000001 801d69a8 85e7bd40 801d6b34 85e7bd4c 8032dc6c 00000000 801dbc80 85e7be80 864315a8 8662c980 00000001 00000742 00000000 00000000 84b85800 85e7bd90 801d6cc0 7fffffff 84a42440 00000002 8032ee74 00000081 804158a0 ... Call Trace: [<8032d574>] __schedule+0x618/0x6b8 from[<8032d62c>] schedule+0x18/0x3c [<8032d62c>] schedule+0x18/0x3c from[<8032dc6c>] schedule_timeout+0x2c/0x1c= 0 [<8032dc6c>] schedule_timeout+0x2c/0x1c0 from[<8032ee74>] __down+0x8c/0xdc [<8032ee74>] __down+0x8c/0xdc from[<8004500c>] down+0x40/0x88 [<8004500c>] down+0x40/0x88 from[<801ca838>] xfs_buf_lock+0xcc/0x15c [<801ca838>] xfs_buf_lock+0xcc/0x15c from[<801b71a0>] xfs_getsb+0x38/0x54 [<801b71a0>] xfs_getsb+0x38/0x54 from[<801d64a8>] xfs_sync_fsdata+0x7c/0x15= 4 [<801d64a8>] xfs_sync_fsdata+0x7c/0x154 from[<801d7284>] xfs_quiesce_data+0x34/0x60 [<801d7284>] xfs_quiesce_data+0x34/0x60 from[<801d3514>] xfs_fs_sync_fs+0x30/0xec [<801d3514>] xfs_fs_sync_fs+0x30/0xec from[<800ba09c>] __fsync_super+0xa4/0xc8 [<800ba09c>] __fsync_super+0xa4/0xc8 from[<800ba0d4>] fsync_super+0x14/0x28 [<800ba0d4>] fsync_super+0x14/0x28 from[<800ba4a0>] generic_shutdown_super+0x34/0x190 [<800ba4a0>] generic_shutdown_super+0x34/0x190 from[<800ba654>] kill_block_super+0x58/0x80 [<800ba654>] kill_block_super+0x58/0x80 from[<800bac6c>] deactivate_super+0x7c/0x110 [<800bac6c>] deactivate_super+0x7c/0x110 from[<800d2bbc>] sys_umount+0x310/0x358 [<800d2bbc>] sys_umount+0x310/0x358 from[<8000ff44>] stack_done+0x20/0x3c ---------------------------------------------------------------------------= ---------- Filesystem "sda2": xfs_log_force: error 5 returned. Please let me know in case more information is needed. Thanks & Regards, Amit Sahrawat On Wed, Dec 22, 2010 at 1:34 PM, Michael Monnerie < michael.monnerie@is.it-management.at> wrote: > On Mittwoch, 22. Dezember 2010 Dave Chinner wrote: > > For future reference, when you are reporting a problem you need to > > be specific about what you were doing to cause the problem you are > > reporting. Describe your kernel, your storage, your test case, any > > errors that occurred before the problem you are reporting, etc. > > > > We need this information to make any sense of your bug report, but > > I'm getting tired of having to ask for it every time you report a > > problem. The more information you put in your bug report, the more > > likely we are to be able to help you. We don't have unlimited > > amounts of time (or patience) to drag all the basic details of your > > problem out of you over 3 or 4 emails, so including it up front will > > help a lot.... > > Should I update this section? > > > http://xfs.org/index.php/XFS_FAQ#Q:_What_information_should_I_include_whe= n_reporting_a_problem.3F > > We should probably just send that link to people so you don't have to > write long texts all the time. > > Maybe above section should be updated to: > > Things to include are what version of XFS you are using and version of > the kernel. If you have problems with userland packages please report > the version of the package you are using. > > If the problem relates to a particular filesystem, the output from the > xfs_info(8) command and any mount(8) options in use will also be useful > to the developers. > > If you experience an oops, please run it through ksymoops so that it can > be interpreted. Also describe what you were doing, if you can repeat it, > and describe you kernel, storage, test case, if there was a hardware > problem before, etc. > > If you have a filesystem that cannot be repaired, make sure you have > xfsprogs 3.1.x or later and run xfs_metadump(8) to capture the metadata > (which obfuscates filenames and attributes to protect your privacy) and > make the dump available for someone to analyse. > > -- > mit freundlichen Gr=FCssen, > Michael Monnerie, Ing. BSc > > it-management Internet Services: Prot=E9ger > http://proteger.at [gesprochen: Prot-e-schee] > Tel: +43 660 / 415 6531 > > // ****** Radiointerview zum Thema Spam ****** > // http://www.it-podcast.at/archiv.html#podcast-100716 > // > // Haus zu verkaufen: http://zmi.at/langegg/ > --0015175cb07e7cd73e0497fc2586 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Hi,
=A0
There seems to be a problem in posting - I already apologized and prov= ided complete details. I guess this was the first time, i missed on providi= ng the test case.
=A0
Please refer my earlier post on the same issue:
=A0
=A0
Extremely sorry for inconvenience, will take care about posting comple= te details in future.
=A0
Test Case :
cp Complex directory struct= ure(large no of files and directories) to my XFS formatted partition:
cp -ar /LibExe /usb/sda2
Unplug the USB while the COPY is in progress.=A0
Storage: USB Flash, USB HDD (Both)
=A0
Kernel: 2.6.34
Tar= get: MIPS
LOGS:
usb 2-1: USB disconnect, address 7
Device sda2, XF= S metadata write error block 0x0 in sda2
xfs_force_shutdown(sda2,0x1) called from line 1004 of file fs/xfs/linux-2.6= /xfs_buf.c.=A0 Return address =3D 0x801cc294
Filesystem "sda2"= : I/O Error Detected.=A0 Shutting down filesystem: sda2
Please umount th= e filesystem, and rectify the problem(s)
=A0
Plug in USB Port1
sd 7:0:0:0: [sdb] Attached SCSI disk
Filesys= tem "sda2": xfs_log_force: error 5 returned.
Filesystem "= sda2": xfs_log_force: error 5 returned.
Filesystem "sda2"= : xfs_log_force: error 5 returned.
Filesystem "sda2": xfs_log_force: error 5 returned.
- Show quo= ted text -
INFO: task usb_mount:1858 blocked for more than 120 seconds.<= br>"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables= this message.
usb_mount=A0=A0=A0=A0=A0=A0=A0 D [84a42440] 8032d62c=A0=A0=A0=A0 0=A0 1858= =A0=A0 1816=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0 (user thread)
Stack : 00000107 00000000 85e7be80 0= 0030002 84a425c8 8032d62c 7fffffff 84a42440
=A0=A0=A0=A0=A0=A0=A0 000000= 02 8496e200 00000001 00000000 85e7bf00 85e7bef8 7fa2f2e0 8032d62c
=A0=A0=A0=A0=A0=A0=A0 00000001 801d69a8 85e7bd40 801d6b34 85e7bd4c 8032dc6c= 00000000 801dbc80
=A0=A0=A0=A0=A0=A0=A0 85e7be80 864315a8 8662c980 0000= 0001 00000742 00000000 00000000 84b85800
=A0=A0=A0=A0=A0=A0=A0 85e7bd90 = 801d6cc0 7fffffff 84a42440 00000002 8032ee74 00000081 804158a0
=A0=A0=A0=A0=A0=A0=A0 ...
Call Trace:
[<8032d574>] __schedule+0= x618/0x6b8 from[<8032d62c>] schedule+0x18/0x3c
[<8032d62c>] = schedule+0x18/0x3c from[<8032dc6c>] schedule_timeout+0x2c/0x1c0
[&= lt;8032dc6c>] schedule_timeout+0x2c/0x1c0 from[<8032ee74>] __down+= 0x8c/0xdc
[<8032ee74>] __down+0x8c/0xdc from[<8004500c>] down+0x40/0x88[<8004500c>] down+0x40/0x88 from[<801ca838>] xfs_buf_lock+0xc= c/0x15c
[<801ca838>] xfs_buf_lock+0xcc/0x15c from[<801b71a0>= ] xfs_getsb+0x38/0x54
[<801b71a0>] xfs_getsb+0x38/0x54 from[<801d64a8>] xfs_sync_fsda= ta+0x7c/0x154
[<801d64a8>] xfs_sync_fsdata+0x7c/0x154 from[<801= d7284>] xfs_quiesce_data+0x34/0x60
[<801d7284>] xfs_quiesce_dat= a+0x34/0x60 from[<801d3514>] xfs_fs_sync_fs+0x30/0xec
[<801d3514>] xfs_fs_sync_fs+0x30/0xec from[<800ba09c>] __fsync_= super+0xa4/0xc8
[<800ba09c>] __fsync_super+0xa4/0xc8 from[<800b= a0d4>] fsync_super+0x14/0x28
[<800ba0d4>] fsync_super+0x14/0x28= from[<800ba4a0>] generic_shutdown_super+0x34/0x190
[<800ba4a0>] generic_shutdown_super+0x34/0x190 from[<800ba654>]= kill_block_super+0x58/0x80
[<800ba654>] kill_block_super+0x58/0x8= 0 from[<800bac6c>] deactivate_super+0x7c/0x110
[<800bac6c>] = deactivate_super+0x7c/0x110 from[<800d2bbc>] sys_umount+0x310/0x358 [<800d2bbc>] sys_umount+0x310/0x358 from[<8000ff44>] stack_done= +0x20/0x3c
-------------------------------------------------------------= ------------------------
Filesystem "sda2": xfs_log_force: err= or 5 returned.
Please let me know in case more information is needed.
=A0
Thank= s & Regards,
Amit Sahrawat

On Wed, Dec 22, 2010 at 1:34 PM, Michael Monneri= e <michael.monnerie@is.it-management.at> wrote:
On Mittwoch, 22. Dezember 2010 Dave Chinner wrote:
>= ; For future reference, when you are reporting a problem you need to
>= ; be specific about what you were doing to cause the problem you are
> reporting. =A0Describe your kernel, your storage, your test case, any<= br>> errors that occurred before the problem you are reporting, etc.
= >
> We need this information to make any sense of your bug report,= but
> I'm getting tired of having to ask for it every time you report a<= br>> problem. The more information you put in your bug report, the more<= br>> likely we are to be able to help you. We don't have unlimited > amounts of time (or patience) to drag all the basic details of your> problem out of you over 3 or 4 emails, so including it up front will<= br>> help a lot....

Should I update this section?

http://xfs.org/index.p= hp/XFS_FAQ#Q:_What_information_should_I_include_when_reporting_a_problem.3F=

We should probably just send that link to people so you don't have = to
write long texts all the time.

Maybe above section should be u= pdated to:

Things to include are what version of XFS you are using a= nd version of
the kernel. If you have problems with userland packages please report
th= e version of the package you are using.

If the problem relates to a = particular filesystem, the output from the
xfs_info(8) command and any m= ount(8) options in use will also be useful
to the developers.

If you experience an oops, please run it through = ksymoops so that it can
be interpreted. Also describe what you were doin= g, if you can repeat it,
and describe you kernel, storage, test case, if= there was a hardware
problem before, etc.

If you have a filesystem that cannot be repaire= d, make sure you have
xfsprogs 3.1.x or later and run xfs_metadump(8) to= capture the metadata
(which obfuscates filenames and attributes to prot= ect your privacy) and
make the dump available for someone to analyse.

--
mit freundlich= en Gr=FCssen,
Michael Monnerie, Ing. BSc

it-management Internet S= ervices: Prot=E9ger
ht= tp://proteger.at [gesprochen: Prot-e-schee]
Tel: +43 660 / 415 6531

// ****** Radiointerview zum Thema Spam ****= **
// http://www.it-podcast.at/archiv.html#podcast-100716
//
// Haus zu verkaufen: http://zmi.at/langegg/

--0015175cb07e7cd73e0497fc2586-- From SRS0+8jG0+25+fromorbit.com=david@internode.on.net Wed Dec 22 03:48:40 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBM9mesR211881 for ; Wed, 22 Dec 2010 03:48:40 -0600 X-ASG-Debug-ID: 1293011435-608403090000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9544D1CEA7E4 for ; Wed, 22 Dec 2010 01:50:36 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id qUWvinAKlcHWWi87 for ; Wed, 22 Dec 2010 01:50:36 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50224996-1927428 for multiple; Wed, 22 Dec 2010 20:20:26 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVLKy-0003Oh-37; Wed, 22 Dec 2010 20:50:24 +1100 Date: Wed, 22 Dec 2010 20:50:24 +1100 From: Dave Chinner To: Michael Monnerie Cc: xfs@oss.sgi.com, Amit Sahrawat , Eric Sandeen X-ASG-Orig-Subj: Re: XFS hangs Subject: Re: XFS hangs Message-ID: <20101222095024.GI4907@dastard> References: <20101222060254.GH4907@dastard> <201012220904.56914@zmi.at> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <201012220904.56914@zmi.at> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1293011437 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA085 X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50159 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 BSF_SC0_SA085 Custom Rule SA085 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 22, 2010 at 09:04:56AM +0100, Michael Monnerie wrote: > On Mittwoch, 22. Dezember 2010 Dave Chinner wrote: > > For future reference, when you are reporting a problem you need to > > be specific about what you were doing to cause the problem you are > > reporting. Describe your kernel, your storage, your test case, any > > errors that occurred before the problem you are reporting, etc. > > > > We need this information to make any sense of your bug report, but > > I'm getting tired of having to ask for it every time you report a > > problem. The more information you put in your bug report, the more > > likely we are to be able to help you. We don't have unlimited > > amounts of time (or patience) to drag all the basic details of your > > problem out of you over 3 or 4 emails, so including it up front will > > help a lot.... > > Should I update this section? > > http://xfs.org/index.php/XFS_FAQ#Q:_What_information_should_I_include_when_reporting_a_problem.3F > > We should probably just send that link to people so you don't have to > write long texts all the time. Yup, I was looking at that earlier today and I agree that it needs an update. I'll update it to include everything that is generally needed in the next few days. Cheers, Dave. -- Dave Chinner david@fromorbit.com From sandeen@sandeen.net Wed Dec 22 10:06:28 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBMG6RMQ250232 for ; Wed, 22 Dec 2010 10:06:28 -0600 X-ASG-Debug-ID: 1293034102-78b900610000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 801231CEC039 for ; Wed, 22 Dec 2010 08:08:22 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id bc5SaTYBHZSBmbHh for ; Wed, 22 Dec 2010 08:08:22 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id 20C0048406EC; Wed, 22 Dec 2010 10:08:22 -0600 (CST) Message-ID: <4D122275.2000808@sandeen.net> Date: Wed, 22 Dec 2010 10:08:21 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: Amit Sahrawat CC: Michael Monnerie , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: XFS hangs Subject: Re: XFS hangs References: <20101222060254.GH4907@dastard> <201012220904.56914@zmi.at> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1293034103 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.82 X-Barracuda-Spam-Status: No, SCORE=-1.82 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA085, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50183 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.10 BSF_SC0_SA085 Custom Rule SA085 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/22/10 3:12 AM, Amit Sahrawat wrote: > Hi, > > There seems to be a problem in posting - I already apologized and > provided complete details. I guess this was the first time, i missed > on providing the test case. the xfs mailing list sometimes eats or delays email :( > Please refer my earlier post on the same issue: > > > Extremely sorry for inconvenience, will take care about posting > complete details in future. > > Test Case : cp Complex directory structure(large no of files and > directories) to my XFS formatted partition: cp -ar /LibExe /usb/sda2 > Unplug the USB while the COPY is in progress. Success here will depend to some degree on how well your storage behaves. For starters, do you see any messages about barriers at mount time? > Storage: USB Flash, USB HDD (Both) > > Kernel: 2.6.34 Target: MIPS LOGS: So you unplug the USB storage: > usb 2-1: USB disconnect, address 7 > Device sda2, XFS metadata write error block 0x0 in sda2 > xfs_force_shutdown(sda2,0x1) called from line 1004 of file > fs/xfs/linux-2.6/xfs_buf.c. Return address = 0x801cc294 Filesystem > "sda2": I/O Error Detected. Shutting down filesystem: sda2 Please > umount the filesystem, and rectify the problem(s) this much looks normal for a storage device that disappears. And now you plug it back in: > Plug in USB Port1 sd 7:0:0:0: [sdb] Attached SCSI disk Filesystem > "sda2": xfs_log_force: error 5 returned. Filesystem "sda2": > xfs_log_force: error 5 returned. Filesystem "sda2": xfs_log_force: > error 5 returned. Filesystem "sda2": xfs_log_force: error 5 EIO. > returned. - Show quoted text - INFO: task usb_mount:1858 blocked for > more than 120 seconds. "echo 0 > > /proc/sys/kernel/hung_task_timeout_secs" disables this message. Might be interesting to know exactly what "usb_mount" does? Fixing the stack trace so I can read it ... > usb_mount D [84a42440] 8032d62c 0 1858 1816 > (user thread) Stack : 00000107 00000000 85e7be80 00030002 84a425c8 > 8032d62c 7fffffff 84a42440 00000002 8496e200 00000001 00000000 > 85e7bf00 85e7bef8 7fa2f2e0 8032d62c 00000001 801d69a8 85e7bd40 > 801d6b34 85e7bd4c 8032dc6c 00000000 801dbc80 85e7be80 864315a8 > 8662c980 00000001 00000742 00000000 00000000 84b85800 85e7bd90 > 801d6cc0 7fffffff 84a42440 00000002 8032ee74 00000081 804158a0 ... > Call Trace: > [<8032d574>] __schedule+0x618/0x6b8 from[<8032d62c>] schedule+0x18/0x3c > [<8032d62c>] schedule+0x18/0x3c from[<8032dc6c>] schedule_timeout+0x2c/0x1c0 > [<8032dc6c>] schedule_timeout+0x2c/0x1c0 from[<8032ee74>] __down+0x8c/0xdc > [<8032ee74>] __down+0x8c/0xdc from[<8004500c>] down+0x40/0x88 > [<8004500c>] down+0x40/0x88 from[<801ca838>] xfs_buf_lock+0xcc/0x15c > [<801ca838>] xfs_buf_lock+0xcc/0x15c from[<801b71a0>] xfs_getsb+0x38/0x54 > [<801b71a0>] xfs_getsb+0x38/0x54 from[<801d64a8>] xfs_sync_fsdata+0x7c/0x154 > [<801d64a8>] xfs_sync_fsdata+0x7c/0x154 from[<801d7284>] xfs_quiesce_data+0x34/0x60 > [<801d7284>] xfs_quiesce_data+0x34/0x60 from[<801d3514>] xfs_fs_sync_fs+0x30/0xec > [<801d3514>] xfs_fs_sync_fs+0x30/0xec from [<800ba09c>] __fsync_super+0xa4/0xc8 > [<800ba09c>] __fsync_super+0xa4/0xc8 from[<800ba0d4>] fsync_super+0x14/0x28 > [<800ba0d4>] fsync_super+0x14/0x28 from[<800ba4a0>] generic_shutdown_super+0x34/0x190 > [<800ba4a0>] generic_shutdown_super+0x34/0x190 from[<800ba654>] kill_block_super+0x58/0x80 > [<800ba654>] kill_block_super+0x58/0x80 from[<800bac6c>] deactivate_super+0x7c/0x110 > [<800bac6c>] deactivate_super+0x7c/0x110 from[<800d2bbc>] sys_umount+0x310/0x358 > [<800d2bbc>] sys_umount+0x310/0x358 from[<8000ff44>] stack_done+0x20/0x3c so "usb_mount" is calling umount. Why? What does this script do? Let's start with what the script is doing, and please also answer Dave's question about what "echo w > /proc/sysrq-trigger" says. This may tell us if other threads are blocked as well. You guys are on a custom kernel with custom hardware so you absolutely must provide as much information as possible if you need help. As Dave said, we can't go back and forth 5 times in email repeatedly begging for info, it doesn't scale, and this sort of support is done in spare time. Given my experience with embedded development processes, I'm also extremely wary of what other unspecified changes may be in the kernel tree. If upstream kernels boot on this hardware, testing a recent pristine upstream kernel would be a very good test as well. Sometimes sending test hardware to developers makes this sort of thing go more smoothly as well. 46" or larger, I suppose ;) Thanks, -Eric > ------------------------------------------------------------------------------------- > > Filesystem "sda2": xfs_log_force: error 5 returned. > Please let me know in case more information is needed. > > Thanks & Regards, Amit Sahrawat > > On Wed, Dec 22, 2010 at 1:34 PM, Michael Monnerie > > wrote: > > On Mittwoch, 22. Dezember 2010 Dave Chinner wrote: >> For future reference, when you are reporting a problem you need to >> be specific about what you were doing to cause the problem you are >> reporting. Describe your kernel, your storage, your test case, >> any errors that occurred before the problem you are reporting, >> etc. >> >> We need this information to make any sense of your bug report, but >> I'm getting tired of having to ask for it every time you report a >> problem. The more information you put in your bug report, the more >> likely we are to be able to help you. We don't have unlimited >> amounts of time (or patience) to drag all the basic details of >> your problem out of you over 3 or 4 emails, so including it up >> front will help a lot.... > > Should I update this section? > > http://xfs.org/index.php/XFS_FAQ#Q:_What_information_should_I_include_when_reporting_a_problem.3F > > We should probably just send that link to people so you don't have > to write long texts all the time. > > Maybe above section should be updated to: > > Things to include are what version of XFS you are using and version > of the kernel. If you have problems with userland packages please > report the version of the package you are using. > > If the problem relates to a particular filesystem, the output from > the xfs_info(8) command and any mount(8) options in use will also be > useful to the developers. > > If you experience an oops, please run it through ksymoops so that it > can be interpreted. Also describe what you were doing, if you can > repeat it, and describe you kernel, storage, test case, if there was > a hardware problem before, etc. > > If you have a filesystem that cannot be repaired, make sure you have > xfsprogs 3.1.x or later and run xfs_metadump(8) to capture the > metadata (which obfuscates filenames and attributes to protect your > privacy) and make the dump available for someone to analyse. > > -- mit freundlichen Grüssen, Michael Monnerie, Ing. BSc > > it-management Internet Services: Protéger http://proteger.at > [gesprochen: Prot-e-schee] Tel: +43 660 / 415 > 6531 > > // ****** Radiointerview zum Thema Spam ****** // > http://www.it-podcast.at/archiv.html#podcast-100716 // // Haus zu > verkaufen: http://zmi.at/langegg/ > > > > > _______________________________________________ xfs mailing list > xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs From jpiszcz@lucidpixels.com Wed Dec 22 10:28:09 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBMGS9ZX254415 for ; Wed, 22 Dec 2010 10:28:09 -0600 X-ASG-Debug-ID: 1293035405-4af9005c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from lucidpixels.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 334C51476303 for ; Wed, 22 Dec 2010 08:30:06 -0800 (PST) Received: from lucidpixels.com (lucidpixels.com [75.144.35.66]) by cuda.sgi.com with ESMTP id HYl4fNjSZIjxNFAK for ; Wed, 22 Dec 2010 08:30:06 -0800 (PST) Received: by lucidpixels.com (Postfix, from userid 1001) id 8B7A91200F4; Wed, 22 Dec 2010 11:30:05 -0500 (EST) Date: Wed, 22 Dec 2010 11:30:05 -0500 (EST) From: Justin Piszcz To: xfs@oss.sgi.com X-ASG-Orig-Subj: Anyone using XFS in production on > 20TiB volumes? Subject: Anyone using XFS in production on > 20TiB volumes? Message-ID: User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; format=flowed; charset=US-ASCII X-Barracuda-Connect: lucidpixels.com[75.144.35.66] X-Barracuda-Start-Time: 1293035407 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50184 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hi, Is there anyone currently using this in production? How much ram is needed when you fsck with a many files on such a volume? Dave Chinner reported 5.5g or so is needed for ~43TB with no inodes. Any recent issues/bugs one needs to be aware of? Is inode64 recommended on a 64-bit system? Any specific 64-bit tweaks/etc for a large 43TiB FS? Justin. From eflorac@intellique.com Wed Dec 22 10:54:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBMGsESZ259435 for ; Wed, 22 Dec 2010 10:54:14 -0600 X-ASG-Debug-ID: 1293036969-15ae03420000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp4-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E8AB31473E1D for ; Wed, 22 Dec 2010 08:56:10 -0800 (PST) Received: from smtp4-g21.free.fr (smtp4-g21.free.fr [212.27.42.4]) by cuda.sgi.com with ESMTP id ZHWu91bBfFb5txxD for ; Wed, 22 Dec 2010 08:56:10 -0800 (PST) Received: from harpe.intellique.com (unknown [82.225.196.72]) by smtp4-g21.free.fr (Postfix) with ESMTP id 61E264C8117; Wed, 22 Dec 2010 17:56:05 +0100 (CET) Date: Wed, 22 Dec 2010 17:56:11 +0100 From: Emmanuel Florac To: Justin Piszcz Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? Message-ID: <20101222175611.1c7d5190@harpe.intellique.com> In-Reply-To: References: Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.16.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp4-g21.free.fr[212.27.42.4] X-Barracuda-Start-Time: 1293036972 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50186 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Wed, 22 Dec 2010 11:30:05 -0500 (EST) Justin Piszcz =E9crivait: > Is there anyone currently using this in production? Yup, lots of people do. Currently supporting 28 such systems (from 20 to 76 TiB, most are 39.7 TiB). > How much ram is needed when you fsck with a many files on such a > volume? Dave Chinner reported 5.5g or so is needed for ~43TB with no > inodes. Any recent issues/bugs one needs to be aware of? I never had any trouble running xfs_repair on 39.7 TB+ systems with 8 GB of RAM. > Is inode64 recommended on a 64-bit system? Sure, however 32 bits clients may scoff sometimes, though it's limited to some weird programs. > Any specific 64-bit tweaks/etc for a large 43TiB FS? >=20 Nothing unusual (inode64,noatime, mkfs with lazy-count enabled, etc). It should just works. --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From cw@f00f.org Wed Dec 22 11:04:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBMH4Nek261837 for ; Wed, 22 Dec 2010 11:04:23 -0600 X-ASG-Debug-ID: 1293037581-2d2602220000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from parsec.stupidest.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 576271475EEE for ; Wed, 22 Dec 2010 09:06:21 -0800 (PST) Received: from parsec.stupidest.org (parsec.stupidest.org [71.6.196.126]) by cuda.sgi.com with ESMTP id b50xJZjq1JKJb2em for ; Wed, 22 Dec 2010 09:06:21 -0800 (PST) Received: from stupidest.org (unknown [10.0.0.2]) by parsec.stupidest.org (Postfix) with ESMTP id DB0EEE6781; Wed, 22 Dec 2010 09:06:20 -0800 (PST) Received: by tuatara.stupidest.org (Postfix, from userid 10000) id 9A0D12827230; Wed, 22 Dec 2010 09:06:20 -0800 (PST) Date: Wed, 22 Dec 2010 09:06:20 -0800 From: Chris Wedgwood To: Justin Piszcz Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? Message-ID: <20101222170620.GA29117@puku.stupidest.org> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Barracuda-Connect: parsec.stupidest.org[71.6.196.126] X-Barracuda-Start-Time: 1293037581 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50188 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 22, 2010 at 11:30:05AM -0500, Justin Piszcz wrote: > Is there anyone currently using this in production? yes (in the past more than now) > How much ram is needed when you fsck with a many files on such a > volume? didn't check specifically, but with older xfsprogs it could easily use more than 16GB > Is inode64 recommended on a 64-bit system? it's for inode distribution, not 64-bit vs 32-bit system yes, enable that ... it should be the default > Any specific 64-bit tweaks/etc for a large 43TiB FS? if using hw raid teach mkfs about the array geom, that coupled with inode64 made a huge difference in performance that last time i did this From jpiszcz@lucidpixels.com Wed Dec 22 11:08:08 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBMH888l000835 for ; Wed, 22 Dec 2010 11:08:08 -0600 X-ASG-Debug-ID: 1293037806-2d2e024e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from lucidpixels.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D4AA01476192 for ; Wed, 22 Dec 2010 09:10:06 -0800 (PST) Received: from lucidpixels.com (lucidpixels.com [75.144.35.66]) by cuda.sgi.com with ESMTP id YiL9YxO5CEWqDpmG for ; Wed, 22 Dec 2010 09:10:06 -0800 (PST) Received: by lucidpixels.com (Postfix, from userid 1001) id 182861200F4; Wed, 22 Dec 2010 12:10:06 -0500 (EST) Date: Wed, 22 Dec 2010 12:10:06 -0500 (EST) From: Justin Piszcz To: Chris Wedgwood cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? In-Reply-To: <20101222170620.GA29117@puku.stupidest.org> Message-ID: References: <20101222170620.GA29117@puku.stupidest.org> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Barracuda-Connect: lucidpixels.com[75.144.35.66] X-Barracuda-Start-Time: 1293037806 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50188 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, 22 Dec 2010, Chris Wedgwood wrote: > if using hw raid teach mkfs about the array geom, that coupled with > inode64 made a huge difference in performance that last time i did > this When I had used XFS in the past on a 3ware 9650SE-16ML with 1TB HDDs I did not notice any performance difference on whether you set the su/swidth/etc. Do you have an example/of what you found? Is it dependent on the RAID card? Justin. From cw@f00f.org Wed Dec 22 11:30:12 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBMHUB7H004615 for ; Wed, 22 Dec 2010 11:30:12 -0600 X-ASG-Debug-ID: 1293039129-1ebb01ff0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from parsec.stupidest.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 631572184E8 for ; Wed, 22 Dec 2010 09:32:09 -0800 (PST) Received: from parsec.stupidest.org (parsec.stupidest.org [71.6.196.126]) by cuda.sgi.com with ESMTP id dTijd9R5YEx8tAPT for ; Wed, 22 Dec 2010 09:32:09 -0800 (PST) Received: from stupidest.org (unknown [10.0.0.2]) by parsec.stupidest.org (Postfix) with ESMTP id 65AFCE6781; Wed, 22 Dec 2010 09:32:09 -0800 (PST) Received: by tuatara.stupidest.org (Postfix, from userid 10000) id 46AD82827230; Wed, 22 Dec 2010 09:32:09 -0800 (PST) Date: Wed, 22 Dec 2010 09:32:09 -0800 From: Chris Wedgwood To: Justin Piszcz Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? Message-ID: <20101222173209.GA29291@puku.stupidest.org> References: <20101222170620.GA29117@puku.stupidest.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Barracuda-Connect: parsec.stupidest.org[71.6.196.126] X-Barracuda-Start-Time: 1293039130 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50189 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 22, 2010 at 12:10:06PM -0500, Justin Piszcz wrote: > Do you have an example/of what you found? i don't have the numbers anymore, they are with a previous employer. basically using dbench (there were cifs NAS machines, so dbench seemed as good or bad as anything to test with) the performance was about 3x better between 'old' and 'new' with a small number of workers and about 10x better with a large number i don't know how much difference each of inode64 and getting the geom right made each, but bother were quite measurable in the graphs i made at the time from memory the machines are raid50 (4x (5+1)) with 2TB drives, so about 38TB usable on each one initially these machines were 3ware controllers and later on LSI (the two products lines have since merged so it's not clear how much difference that makes now) in testing 16GB for xfs_repair wasn't enough, so they were upped to 64GB, that's likely largely a result of the fact there were 100s of millions of small files (as well as some large ones) > Is it dependent on the RAID card? perhaps, do you have a BBU and enable WC? certainly we found the LSI cards to be faster in most cases than the (now old) 3ware where i am now i use larger chassis and no hw raid cards, using sw raid on these works spectacularly well with the exception of burst of small seeky writes (which a BBU + wc soaks up quite well) From jpiszcz@lucidpixels.com Wed Dec 22 11:33:49 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBMHXn64005479 for ; Wed, 22 Dec 2010 11:33:49 -0600 X-ASG-Debug-ID: 1293039346-2d29032a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from lucidpixels.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2D5601476378 for ; Wed, 22 Dec 2010 09:35:46 -0800 (PST) Received: from lucidpixels.com (lucidpixels.com [75.144.35.66]) by cuda.sgi.com with ESMTP id WZ6FsIedmmBrNpWG for ; Wed, 22 Dec 2010 09:35:46 -0800 (PST) Received: by lucidpixels.com (Postfix, from userid 1001) id 3E37F1200F4; Wed, 22 Dec 2010 12:35:46 -0500 (EST) Date: Wed, 22 Dec 2010 12:35:46 -0500 (EST) From: Justin Piszcz To: Chris Wedgwood cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? In-Reply-To: <20101222173209.GA29291@puku.stupidest.org> Message-ID: References: <20101222170620.GA29117@puku.stupidest.org> <20101222173209.GA29291@puku.stupidest.org> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Barracuda-Connect: lucidpixels.com[75.144.35.66] X-Barracuda-Start-Time: 1293039347 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50190 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, 22 Dec 2010, Chris Wedgwood wrote: > On Wed, Dec 22, 2010 at 12:10:06PM -0500, Justin Piszcz wrote: > >> Do you have an example/of what you found? > > i don't have the numbers anymore, they are with a previous employer. > > basically using dbench (there were cifs NAS machines, so dbench seemed > as good or bad as anything to test with) the performance was about 3x > better between 'old' and 'new' with a small number of workers and > about 10x better with a large number Is this by specifying the sunit/swidth? Can you elaborate on which paramters you modified? > > i don't know how much difference each of inode64 and getting the geom > right made each, but bother were quite measurable in the graphs i made > at the time > > > from memory the machines are raid50 (4x (5+1)) with 2TB drives, so > about 38TB usable on each one > > initially these machines were 3ware controllers and later on LSI (the > two products lines have since merged so it's not clear how much > difference that makes now) > > in testing 16GB for xfs_repair wasn't enough, so they were upped to > 64GB, that's likely largely a result of the fact there were 100s of > millions of small files (as well as some large ones) Yikes =) Hopefully its better now? > >> Is it dependent on the RAID card? > > perhaps, do you have a BBU and enable WC? certainly we found the LSI > cards to be faster in most cases than the (now old) 3ware Yes and have it set to perform(ance). Going to be using 19HDD x 3TB Hiatchi 7200RPMs, (18HDD RAID-6 + 1 hot spare). > > where i am now i use larger chassis and no hw raid cards, using sw > raid on these works spectacularly well with the exception of burst of > small seeky writes (which a BBU + wc soaks up quite well) Interesting.. > From cw@f00f.org Wed Dec 22 12:48:08 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBMIm8UB015559 for ; Wed, 22 Dec 2010 12:48:08 -0600 X-ASG-Debug-ID: 1293043805-2ff2015f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from parsec.stupidest.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9F06414768F7 for ; Wed, 22 Dec 2010 10:50:05 -0800 (PST) Received: from parsec.stupidest.org (parsec.stupidest.org [71.6.196.126]) by cuda.sgi.com with ESMTP id OUeKKa3t9EfopYbH for ; Wed, 22 Dec 2010 10:50:05 -0800 (PST) Received: from stupidest.org (unknown [10.0.0.2]) by parsec.stupidest.org (Postfix) with ESMTP id AB508E6777; Wed, 22 Dec 2010 10:50:05 -0800 (PST) Received: by tuatara.stupidest.org (Postfix, from userid 10000) id 88B1C2827230; Wed, 22 Dec 2010 10:50:05 -0800 (PST) Date: Wed, 22 Dec 2010 10:50:05 -0800 From: Chris Wedgwood To: Justin Piszcz Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? Message-ID: <20101222185005.GB30073@puku.stupidest.org> References: <20101222170620.GA29117@puku.stupidest.org> <20101222173209.GA29291@puku.stupidest.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Barracuda-Connect: parsec.stupidest.org[71.6.196.126] X-Barracuda-Start-Time: 1293043806 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50194 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 22, 2010 at 12:35:46PM -0500, Justin Piszcz wrote: > Is this by specifying the sunit/swidth? yes > Can you elaborate on which paramters you modified? i set both to match what the hw raid was doing, the lru that is my brain doesn't have the detail anymore sorry at a guess it was probably something like 64k chunk, 20 devices wide the metadata performance difference between wrong and right is quite noticable > Yes and have it set to perform(ance). be sure you have a bbu, there is a setting for force wc --- i wouldn't do that i would have it wc when the battery is good automatically disable it when it's bad i was able to buffer ~490MB of writes in the card without trying hard, that's a lot of pain to get corrupted > Going to be using 19HDD x 3TB Hiatchi 7200RPMs, (18HDD RAID-6 + 1 > hot spare). are those 4k sector drives? i ask because it's not clear if/how the raid fw deals with these From sandeen@sandeen.net Wed Dec 22 13:01:18 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBMJ1ImQ016190 for ; Wed, 22 Dec 2010 13:01:18 -0600 X-ASG-Debug-ID: 1293044594-2fef01e40000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0E2A31477540 for ; Wed, 22 Dec 2010 11:03:14 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id cOqA8UK4M0xNjzuG for ; Wed, 22 Dec 2010 11:03:14 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id D0F494882007; Wed, 22 Dec 2010 13:03:13 -0600 (CST) Message-ID: <4D124B71.9030401@sandeen.net> Date: Wed, 22 Dec 2010 13:03:13 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: Emmanuel Florac CC: Justin Piszcz , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? References: <20101222175611.1c7d5190@harpe.intellique.com> In-Reply-To: <20101222175611.1c7d5190@harpe.intellique.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1293044595 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.82 X-Barracuda-Spam-Status: No, SCORE=-1.82 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA085, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50194 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.10 BSF_SC0_SA085 Custom Rule SA085 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/22/10 10:56 AM, Emmanuel Florac wrote: > Le Wed, 22 Dec 2010 11:30:05 -0500 (EST) > Justin Piszcz écrivait: > >> Is there anyone currently using this in production? > > Yup, lots of people do. Currently supporting 28 such systems (from 20 > to 76 TiB, most are 39.7 TiB). > >> How much ram is needed when you fsck with a many files on such a >> volume? Dave Chinner reported 5.5g or so is needed for ~43TB with no >> inodes. Any recent issues/bugs one needs to be aware of? > > I never had any trouble running xfs_repair on 39.7 TB+ systems with 8 GB > of RAM. > >> Is inode64 recommended on a 64-bit system? > > Sure, however 32 bits clients may scoff sometimes, though it's limited > to some weird programs. > >> Any specific 64-bit tweaks/etc for a large 43TiB FS? >> > > Nothing unusual (inode64,noatime, mkfs with lazy-count enabled, etc). It > should just works. yes, inode64 is recommended for such a large filesystem; lazy-count has been default in mkfs for quite some time. noatime if you really need it, I guess. See also http://xfs.org/index.php/XFS_FAQ#Q:_I_want_to_tune_my_XFS_filesystems_for_.3Csomething.3E which mentions getting your geometry right if it's hardware raid that can't be detected automatically. (maybe we should add inode64 usecases to that too...) -Eric From jpiszcz@lucidpixels.com Wed Dec 22 13:22:27 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBMJMQXt018752 for ; Wed, 22 Dec 2010 13:22:27 -0600 X-ASG-Debug-ID: 1293045864-2ff8028c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from lucidpixels.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D0EF514772AC for ; Wed, 22 Dec 2010 11:24:24 -0800 (PST) Received: from lucidpixels.com (lucidpixels.com [75.144.35.66]) by cuda.sgi.com with ESMTP id C6zKnsQG7MlZFyVw for ; Wed, 22 Dec 2010 11:24:24 -0800 (PST) Received: by lucidpixels.com (Postfix, from userid 1001) id F1DD612013D; Wed, 22 Dec 2010 14:24:23 -0500 (EST) Date: Wed, 22 Dec 2010 14:24:23 -0500 (EST) From: Justin Piszcz To: Chris Wedgwood cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? In-Reply-To: <20101222185005.GB30073@puku.stupidest.org> Message-ID: References: <20101222170620.GA29117@puku.stupidest.org> <20101222173209.GA29291@puku.stupidest.org> <20101222185005.GB30073@puku.stupidest.org> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Barracuda-Connect: lucidpixels.com[75.144.35.66] X-Barracuda-Start-Time: 1293045864 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50196 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, 22 Dec 2010, Chris Wedgwood wrote: > On Wed, Dec 22, 2010 at 12:35:46PM -0500, Justin Piszcz wrote: > >> Is this by specifying the sunit/swidth? > > yes > >> Can you elaborate on which paramters you modified? > > i set both to match what the hw raid was doing, the lru that is my > brain doesn't have the detail anymore sorry > > at a guess it was probably something like 64k chunk, 20 devices wide > > > the metadata performance difference between wrong and right is quite > noticable > > >> Yes and have it set to perform(ance). > > be sure you have a bbu, there is a setting for force wc --- i wouldn't > do that > > i would have it wc when the battery is good automatically disable it > when it's bad > > i was able to buffer ~490MB of writes in the card without trying hard, > that's a lot of pain to get corrupted > >> Going to be using 19HDD x 3TB Hiatchi 7200RPMs, (18HDD RAID-6 + 1 >> hot spare). > > are those 4k sector drives? i ask because it's not clear if/how the > raid fw deals with these > Hi, they are 512 byte sector drives. From aelder@sgi.com Wed Dec 22 15:39:19 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_64 autolearn=no version=3.4.0-r929098 Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBMLdJPF033470 for ; Wed, 22 Dec 2010 15:39:19 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay2.corp.sgi.com (Postfix) with ESMTP id 3F3843040C9; Wed, 22 Dec 2010 13:41:15 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 22 Dec 2010 15:41:14 -0600 Subject: Re: xfs: add FITRIM support From: Alex Elder Reply-To: aelder@sgi.com To: Christoph Hellwig Cc: xfs@oss.sgi.com In-Reply-To: <20101125112304.GA4195@infradead.org> References: <20101125112304.GA4195@infradead.org> Content-Type: text/plain; charset="UTF-8" Date: Wed, 22 Dec 2010 15:41:13 -0600 Message-ID: <1293054073.2408.374.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 22 Dec 2010 21:41:14.0724 (UTC) FILETIME=[F53CB240:01CBA220] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean (I actually wrote most of this last week and finally decided it'd be better to send it than to sit on it.) On Thu, 2010-11-25 at 06:23 -0500, Christoph Hellwig wrote: > Allow manual discards from userspace using the FITRIM ioctl. This is not > intended to be run during normal workloads, as the freepsace btree walks > can cause large performance degradation. > > Signed-off-by: Christoph Hellwig I missed this when it first came through, sorry. A few comments and questions, below. Mostly driven by my not knowing where to find a reference on what (precisely) FITRIM is supposed to do. -Alex . . . > Index: linux-2.6/fs/xfs/linux-2.6/xfs_discard.c > =================================================================== > --- /dev/null 1970-01-01 00:00:00.000000000 +0000 > +++ linux-2.6/fs/xfs/linux-2.6/xfs_discard.c 2010-11-25 12:14:43.270005863 +0100 > @@ -0,0 +1,187 @@ . . . > + > +STATIC int > +xfs_trim_extents( > + struct xfs_mount *mp, > + xfs_agnumber_t agno, > + xfs_fsblock_t start, > + xfs_fsblock_t len, > + xfs_fsblock_t minlen) > +{ > + struct block_device *bdev = mp->m_ddev_targp->bt_bdev; > + struct xfs_btree_cur *cur; > + struct xfs_buf *agbp; > + struct xfs_perag *pag; > + int error; > + int i; > + > + pag = xfs_perag_get(mp, agno); > + > + error = xfs_alloc_read_agf(mp, NULL, agno, > + XFS_ALLOC_FLAG_TRYLOCK, &agbp); > + if (error || !agbp) { > + if (error == EAGAIN) > + error = 0; EAGAIN is ignored because it's an advisory interface, right? How hard are we expected to try? What I really mean is, is the benefit of FITRIM enough that we should try again later when we can get a buffer or lock on it? > + goto out_put_perag; > + } > + > + cur = xfs_allocbt_init_cursor(mp, NULL, agbp, agno, XFS_BTNUM_CNT); > + > + /* > + * Force out the log. This means any transactions that might have freed > + * space before we took the AGF buffer lock are now on disk, and the > + * volatile disk cache is flushed. > + */ > + xfs_log_force(mp, XFS_LOG_SYNC); > + > + /* > + * Look up the longest btree in the AGF and start with it. > + */ > + error = xfs_alloc_lookup_le(cur, 0, > + XFS_BUF_TO_AGF(agbp)->agf_longest, &i); > + if (error) > + goto out_del_cursor; > + > + /* > + * Loop until we are done with all extents that are large > + * enough to be worth discarding. > + */ > + while (i) { > + xfs_agblock_t fbno; > + xfs_extlen_t flen; > + > + error = xfs_alloc_get_rec(cur, &fbno, &flen, &i); > + if (error) > + goto out_del_cursor; > + XFS_WANT_CORRUPTED_GOTO(i == 1, out_del_cursor); > + ASSERT(flen <= XFS_BUF_TO_AGF(agbp)->agf_longest); > + > + /* > + * Too small? Give up. > + */ > + if (flen < minlen) { > + trace_xfs_discard_toosmall(mp, agno, fbno, flen); > + goto out_del_cursor; > + } > + > + /* > + * If the extent is entirely outside of the range we are > + * supposed to discard skip it. Do not bother to trim > + * down partially overlapping ranges for now. > + */ > + if (XFS_AGB_TO_FSB(mp, agno, fbno) + flen < start || > + XFS_AGB_TO_FSB(mp, agno, fbno) > start + len) { > + trace_xfs_discard_exclude(mp, agno, fbno, flen); > + goto next_extent; > + } > + > + /* > + * If any blocks in the range are still busy, skip the > + * discard and try again the next time. > + */ > + if (xfs_alloc_busy_search(mp, agno, fbno, flen)) { > + trace_xfs_discard_busy(mp, agno, fbno, flen); > + goto next_extent; > + } > + > + trace_xfs_discard_extent(mp, agno, fbno, flen); > + error = -blkdev_issue_discard(bdev, > + XFS_AGB_TO_DADDR(mp, agno, fbno), > + XFS_FSB_TO_BB(mp, flen), > + GFP_NOFS, 0); > + if (error) > + goto out_del_cursor; > + > +next_extent: > + error = xfs_btree_decrement(cur, 0, &i); > + if (error) > + goto out_del_cursor; > + } > + > +out_del_cursor: > + xfs_btree_del_cursor(cur, error ? XFS_BTREE_ERROR : XFS_BTREE_NOERROR); > + xfs_buf_relse(agbp); > +out_put_perag: > + xfs_perag_put(pag); > + return error; > +} > + > +int > +xfs_ioc_trim( > + struct xfs_mount *mp, > + struct fstrim_range *urange) struct fstrim_range __user *urange) > +{ > + struct request_queue *q = mp->m_ddev_targp->bt_bdev->bd_disk->queue; > + unsigned int granularity = q->limits.discard_granularity; > + struct fstrim_range range; > + xfs_fsblock_t start, len, minlen; > + xfs_agnumber_t start_agno, end_agno, agno; > + int error, last_error = 0; > + > + if (!capable(CAP_SYS_ADMIN)) > + return -XFS_ERROR(EPERM); > + if (copy_from_user(&range, urange, sizeof(range))) > + return -XFS_ERROR(EFAULT); > + > + /* > + * Truncating down the len isn't actually quite correct, but using > + * XFS_B_TO_FSB would mean we trivially get overflows for values > + * of ULLONG_MAX or slightly lower. And ULLONG_MAX is the default > + * used by the fstrim application. In the end it really doesn't > + * matter as trimming blocks is an advisory interface. I don't know where (or if) FITRIM is precisely documented. But I question whether truncating down the start offset is the correct thing to do. If the starting byte offset given were not block-aligned, it seems like you should not assume that the caller wanted the bytes below unmapped. (This is a broader question, not related directly to your change.) Similarly, on the length it is probably best to truncate it, because it avoids any bytes beyond the specified range getting unmapped. (I.e., in my mind what you did is the right way to do it.) But these interpretations are dependent on the specific interpretation of FITRIM... > + */ > + start = XFS_B_TO_FSBT(mp, range.start); > + len = XFS_B_TO_FSBT(mp, range.len); > + minlen = XFS_B_TO_FSB(mp, max_t(u64, granularity, range.minlen)); > + > + start_agno = XFS_FSB_TO_AGNO(mp, start); > + if (start_agno >= mp->m_sb.sb_agcount) > + return -XFS_ERROR(EINVAL); > + > + end_agno = XFS_FSB_TO_AGNO(mp, start + len); > + if (end_agno >= mp->m_sb.sb_agcount) > + end_agno = mp->m_sb.sb_agcount - 1; > + > + for (agno = start_agno; agno <= end_agno; agno++) { > + error = -xfs_trim_extents(mp, agno, start, len, minlen); > + if (error) > + last_error = error; > + } > + You don't update range anywhere, so the copyout below is not really doing anything useful. However I think it should stay, and the number of bytes actually trimmed should be updated and returned to the user. That seems to be what ext4 does (the only reference I found at the moment for what FITRIM is supposed to return). > + if (copy_to_user(urange, &range, sizeof(range))) > + return -XFS_ERROR(EFAULT); > + return last_error; > +} . . . From uuklo@akcja.pl Wed Dec 22 16:37:56 2010 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBMMbswN040210 for ; Wed, 22 Dec 2010 16:37:55 -0600 X-ASG-Debug-ID: 1293057589-251b01b40000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mout8.freenet.de (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 33F0A21984D for ; Wed, 22 Dec 2010 14:39:49 -0800 (PST) Received: from mout8.freenet.de (mout8.freenet.de [195.4.92.98]) by cuda.sgi.com with ESMTP id WC8XonLuO37kP4CT for ; Wed, 22 Dec 2010 14:39:49 -0800 (PST) Received: from [195.4.92.19] (helo=9.mx.freenet.de) by mout8.freenet.de with esmtpa (ID mmmxz@justmail.de) (port 25) (Exim 4.72 #3) id 1PVXLR-0001Iy-Df; Wed, 22 Dec 2010 23:39:41 +0100 Received: from 41-184-48-38.rv.ipnxtelecoms.com ([41.184.48.38]:40233 helo=User) by 9.mx.freenet.de with esmtpa (ID mmmxz@justmail.de) (port 587) (Exim 4.72 #3) id 1PVXKw-0003h3-JY; Wed, 22 Dec 2010 23:39:41 +0100 Reply-To: From: "@MSL" X-ASG-Orig-Subj: Suprise!! Subject: Suprise!! 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AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA= ------=_NextPart_000_0018_01C2A9A6.18EFFA2A-- From eflorac@intellique.com Wed Dec 22 18:25:09 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN0P984055368 for ; Wed, 22 Dec 2010 18:25:09 -0600 X-ASG-Debug-ID: 1293064021-0ea200b00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp3-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3A7DC219A10 for ; Wed, 22 Dec 2010 16:27:05 -0800 (PST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id 3uARyPfx79Dg0KbK for ; Wed, 22 Dec 2010 16:27:05 -0800 (PST) Received: from galadriel.home (unknown [82.235.234.79]) by smtp3-g21.free.fr (Postfix) with ESMTP id 75189A616C; Thu, 23 Dec 2010 01:26:57 +0100 (CET) Date: Thu, 23 Dec 2010 01:26:55 +0100 From: Emmanuel Florac To: Eric Sandeen Cc: Justin Piszcz , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? Message-ID: <20101223012655.2681c596@galadriel.home> In-Reply-To: <4D124B71.9030401@sandeen.net> References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp3-g21.free.fr[212.27.42.3] X-Barracuda-Start-Time: 1293064027 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA085 X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50217 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 BSF_SC0_SA085 Custom Rule SA085 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Wed, 22 Dec 2010 13:03:13 -0600 vous =E9criviez: > http://xfs.org/index.php/XFS_FAQ#Q:_I_want_to_tune_my_XFS_filesystems_for= _.3Csomething.3E >=20 > which mentions getting your geometry right if it's hardware raid > that can't be detected automatically. Just as a side note : I tried several times to manually set the filesystem layout to precisely match the underlying hardware RAID with sunit and swidth but didn't find that it made a noticeable difference. On my 39.9 TB systems, the default agcount is 39, while the optimum would be (theorically at least) 42.=20 --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From jpiszcz@lucidpixels.com Wed Dec 22 18:26:32 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN0QWnX055537 for ; Wed, 22 Dec 2010 18:26:32 -0600 X-ASG-Debug-ID: 1293064110-021201420000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from lucidpixels.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 83B56219A1B for ; Wed, 22 Dec 2010 16:28:30 -0800 (PST) Received: from lucidpixels.com (lucidpixels.com [75.144.35.66]) by cuda.sgi.com with ESMTP id bijORHcX1h5Jc8jF for ; Wed, 22 Dec 2010 16:28:30 -0800 (PST) Received: by lucidpixels.com (Postfix, from userid 1001) id AF3251204B5; Wed, 22 Dec 2010 19:28:29 -0500 (EST) Date: Wed, 22 Dec 2010 19:28:29 -0500 (EST) From: Justin Piszcz To: Emmanuel Florac cc: Eric Sandeen , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? In-Reply-To: <20101223012655.2681c596@galadriel.home> Message-ID: References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="655872-2018785734-1293064109=:7452" X-Barracuda-Connect: lucidpixels.com[75.144.35.66] X-Barracuda-Start-Time: 1293064110 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA085 X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50217 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 BSF_SC0_SA085 Custom Rule SA085 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --655872-2018785734-1293064109=:7452 Content-Type: TEXT/PLAIN; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Thu, 23 Dec 2010, Emmanuel Florac wrote: > Le Wed, 22 Dec 2010 13:03:13 -0600 vous =E9criviez: > >> http://xfs.org/index.php/XFS_FAQ#Q:_I_want_to_tune_my_XFS_filesystems_fo= r_.3Csomething.3E >> >> which mentions getting your geometry right if it's hardware raid >> that can't be detected automatically. > > Just as a side note : I tried several times to manually set the > filesystem layout to precisely match the underlying hardware RAID > with sunit and swidth but didn't find that it made a noticeable > difference. On my 39.9 TB systems, the default agcount is 39, while the > optimum would be (theorically at least) 42. > > --=20 > ------------------------------------------------------------------------ > Emmanuel Florac | Direction technique > | Intellique > |=09 > | +33 1 78 94 84 02 > ------------------------------------------------------------------------ > Hi, I concur, for hardware raid (at least on 3ware cards) I have found it= =20 makes no difference, thanks for confirming. Which RAID cards did you use? Justin. --655872-2018785734-1293064109=:7452-- From SRS0+02w5+26+fromorbit.com=david@internode.on.net Wed Dec 22 18:54:36 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN0sat7059916 for ; Wed, 22 Dec 2010 18:54:36 -0600 X-ASG-Debug-ID: 1293065792-420803880000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7385114786DA for ; Wed, 22 Dec 2010 16:56:33 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id iB6kPX4sjxpANmeK for ; Wed, 22 Dec 2010 16:56:33 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50789429-1927428 for multiple; Thu, 23 Dec 2010 11:26:32 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVZTq-0004gH-6S; Thu, 23 Dec 2010 11:56:30 +1100 Date: Thu, 23 Dec 2010 11:56:30 +1100 From: Dave Chinner To: Justin Piszcz Cc: Emmanuel Florac , Eric Sandeen , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? Message-ID: <20101223005630.GJ4907@dastard> References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1293065794 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA085 X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50218 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 BSF_SC0_SA085 Custom Rule SA085 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 22, 2010 at 07:28:29PM -0500, Justin Piszcz wrote: > > > On Thu, 23 Dec 2010, Emmanuel Florac wrote: > > >Le Wed, 22 Dec 2010 13:03:13 -0600 vous écriviez: > > > >>http://xfs.org/index.php/XFS_FAQ#Q:_I_want_to_tune_my_XFS_filesystems_for_.3Csomething.3E > >> > >>which mentions getting your geometry right if it's hardware raid > >>that can't be detected automatically. > > > >Just as a side note : I tried several times to manually set the > >filesystem layout to precisely match the underlying hardware RAID > >with sunit and swidth but didn't find that it made a noticeable > >difference. On my 39.9 TB systems, the default agcount is 39, while the > >optimum would be (theorically at least) 42. > > Hi, I concur, for hardware raid (at least on 3ware cards) I have > found it makes no difference, thanks for confirming. I'd constrain that statement to "no difference for the workloads and hardware tested". Indeed, testing an empty filesystem will often show no difference in performance, because typically problems don't show up until you've started to age the filesystem significantly. When the filesystem has started to age, the difference between having done lots of stripe unit/width aligned allocation vs none can be very significant.... Hence don't assume that because you can't see any difference on a brand new, empty filesystem there never will be a difference over the life of the filesytem... Cheers, Dave. -- Dave Chinner david@fromorbit.com From eflorac@intellique.com Wed Dec 22 19:09:14 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN19E6f062319 for ; Wed, 22 Dec 2010 19:09:14 -0600 X-ASG-Debug-ID: 1293066669-0cf6000f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp3-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1B36014784EB for ; Wed, 22 Dec 2010 17:11:10 -0800 (PST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id EijFO1UckK55bdMV for ; Wed, 22 Dec 2010 17:11:10 -0800 (PST) Received: from galadriel.home (unknown [82.235.234.79]) by smtp3-g21.free.fr (Postfix) with ESMTP id BBB76A610F; Thu, 23 Dec 2010 02:11:05 +0100 (CET) Date: Thu, 23 Dec 2010 02:10:59 +0100 From: Emmanuel Florac To: Justin Piszcz Cc: Eric Sandeen , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? Message-ID: <20101223021059.059fa9db@galadriel.home> In-Reply-To: References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp3-g21.free.fr[212.27.42.3] X-Barracuda-Start-Time: 1293066673 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50220 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Wed, 22 Dec 2010 19:28:29 -0500 (EST) vous =E9criviez: > Hi, I concur, for hardware raid (at least on 3ware cards) I have > found it makes no difference, thanks for confirming. >=20 > Which RAID cards did you use? Mostly 3Ware until recently, but I switched to Adaptec. However I'm still running tests to sort out any peculiarity - found quite a lot of "features" since 2008 :) --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From SRS0+ai79+26+fromorbit.com=david@internode.on.net Wed Dec 22 19:13:52 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN1Dqf9062696 for ; Wed, 22 Dec 2010 19:13:52 -0600 X-ASG-Debug-ID: 1293066948-611b02760000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id DAC131CED6BC for ; Wed, 22 Dec 2010 17:15:49 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id U6QkYGXy9W5ihF3h for ; Wed, 22 Dec 2010 17:15:49 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50291609-1927428 for ; Thu, 23 Dec 2010 11:45:48 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVZmU-0004iZ-FV for xfs@oss.sgi.com; Thu, 23 Dec 2010 12:15:46 +1100 Date: Thu, 23 Dec 2010 12:15:46 +1100 From: Dave Chinner To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 00/34] xfs: scalability patchset for 2.6.38 Subject: Re: [PATCH 00/34] xfs: scalability patchset for 2.6.38 Message-ID: <20101223011546.GK4907@dastard> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292916570-25015-1-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1293066950 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50219 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 06:28:56PM +1100, Dave Chinner wrote: > Folks, > > I'm sending the entire series of scalability patches in a single > patchbomb because I'm tired and it's too much like hard work to send > it out in multiple patchsets (i.e. I'm being lazy). Overall there > are relatively few changes: > > - new patch for iolock lockdep annotations > - new patch for allocations under ilock > > rcu inode freeing and lookup: > - reworked reclaim to use rcu read locking > - removed synchronise_rcu() from lookup failure > - cleaned up validity checks, added comments and rcu_read_lock_held > annotations > > AIL locking > - fixed aild sleep to use TASK_INTERRUPTABLE > > Log grant scaling > - made reserveq/writeq tracing just indicate if there are queued > tickets. > - cleaned up some minor formatting nitpicks suggested by Christoph > - split xlog_space_left() into __xlog_space_left() for AIl tail > pushing to work off a single tail lsn value. > > I'm mainly concerned with getting reviews for the few remaining > patches that don't currently have reviewed-by tags. Christoph, I > think I've fixed all the things your last round of comments covered, > so there should be relatively little remaining to be fixed up. > > The series is in the following git tree which is based on the > current OSS xfs tree. Alex, once I get the remaining reviews > complete I'll update the branch and send you a pull request. I've just pushed a new version out with all the new reviewed-by tags and fixups noticed. git://git.kernel.org/pub/scm/linux/dgc/xfsdev.git xfs-for-2.6.38 kernel.org is pretty slow right now, so it might take a while for it to propagate through. The patches I still need reviews for are: lib: percpu counter add unless less than functionality xfs: dynamic speculative EOF preallocation xfs: convert l_tail_lsn to an atomic variable Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+mveC+26+fromorbit.com=david@internode.on.net Wed Dec 22 19:42:18 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_64 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN1gH0l067811 for ; Wed, 22 Dec 2010 19:42:18 -0600 X-ASG-Debug-ID: 1293068653-149001010000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 186ED1478819 for ; Wed, 22 Dec 2010 17:44:14 -0800 (PST) Received: from mail.internode.on.net (bld-mail20.adl6.internode.on.net [150.101.137.105]) by cuda.sgi.com with ESMTP id 5opt0qGBGz5pskFp for ; Wed, 22 Dec 2010 17:44:14 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 5604597-1927428 for multiple; Thu, 23 Dec 2010 12:14:12 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVaDx-0004kU-R3; Thu, 23 Dec 2010 12:44:09 +1100 Date: Thu, 23 Dec 2010 12:44:09 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfs: add FITRIM support Subject: Re: xfs: add FITRIM support Message-ID: <20101223014409.GL4907@dastard> References: <20101125112304.GA4195@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101125112304.GA4195@infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail20.adl6.internode.on.net[150.101.137.105] X-Barracuda-Start-Time: 1293068656 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50222 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Nov 25, 2010 at 06:23:04AM -0500, Christoph Hellwig wrote: > Allow manual discards from userspace using the FITRIM ioctl. This is not > intended to be run during normal workloads, as the freepsace btree walks > can cause large performance degradation. > > Signed-off-by: Christoph Hellwig ..... > +STATIC int > +xfs_trim_extents( > + struct xfs_mount *mp, > + xfs_agnumber_t agno, > + xfs_fsblock_t start, > + xfs_fsblock_t len, > + xfs_fsblock_t minlen) > +{ > + struct block_device *bdev = mp->m_ddev_targp->bt_bdev; > + struct xfs_btree_cur *cur; > + struct xfs_buf *agbp; > + struct xfs_perag *pag; > + int error; > + int i; > + > + pag = xfs_perag_get(mp, agno); > + > + error = xfs_alloc_read_agf(mp, NULL, agno, > + XFS_ALLOC_FLAG_TRYLOCK, &agbp); > + if (error || !agbp) { > + if (error == EAGAIN) > + error = 0; > + goto out_put_perag; > + } > + > + cur = xfs_allocbt_init_cursor(mp, NULL, agbp, agno, XFS_BTNUM_CNT); > + > + /* > + * Force out the log. This means any transactions that might have freed > + * space before we took the AGF buffer lock are now on disk, and the > + * volatile disk cache is flushed. > + */ > + xfs_log_force(mp, XFS_LOG_SYNC); > + > + /* > + * Look up the longest btree in the AGF and start with it. > + */ > + error = xfs_alloc_lookup_le(cur, 0, > + XFS_BUF_TO_AGF(agbp)->agf_longest, &i); > + if (error) > + goto out_del_cursor; > + > + /* > + * Loop until we are done with all extents that are large > + * enough to be worth discarding. > + */ > + while (i) { > + xfs_agblock_t fbno; > + xfs_extlen_t flen; > + > + error = xfs_alloc_get_rec(cur, &fbno, &flen, &i); > + if (error) > + goto out_del_cursor; > + XFS_WANT_CORRUPTED_GOTO(i == 1, out_del_cursor); > + ASSERT(flen <= XFS_BUF_TO_AGF(agbp)->agf_longest); > + > + /* > + * Too small? Give up. > + */ > + if (flen < minlen) { > + trace_xfs_discard_toosmall(mp, agno, fbno, flen); > + goto out_del_cursor; > + } > + > + /* > + * If the extent is entirely outside of the range we are > + * supposed to discard skip it. Do not bother to trim > + * down partially overlapping ranges for now. > + */ > + if (XFS_AGB_TO_FSB(mp, agno, fbno) + flen < start || > + XFS_AGB_TO_FSB(mp, agno, fbno) > start + len) { > + trace_xfs_discard_exclude(mp, agno, fbno, flen); > + goto next_extent; > + } Hmmmm - if we are given a range to trim, wouldn't we do better to walk the by-bno btree instead? i.e, we have two different cases here - trim an entire AG, and trim part of an AG given by {start, end}. We only need these range checks on the AGs that are only partially trimmed, and it would seem more efficient to me to walk the by-bno tree for those rather than walk the by-size tree trying to find range matches. > + > + /* > + * If any blocks in the range are still busy, skip the > + * discard and try again the next time. > + */ > + if (xfs_alloc_busy_search(mp, agno, fbno, flen)) { > + trace_xfs_discard_busy(mp, agno, fbno, flen); > + goto next_extent; > + } > + > + trace_xfs_discard_extent(mp, agno, fbno, flen); > + error = -blkdev_issue_discard(bdev, > + XFS_AGB_TO_DADDR(mp, agno, fbno), > + XFS_FSB_TO_BB(mp, flen), > + GFP_NOFS, 0); > + if (error) > + goto out_del_cursor; > + > +next_extent: > + error = xfs_btree_decrement(cur, 0, &i); > + if (error) > + goto out_del_cursor; > + } Hmmm - so we hold the agf locked for the entire trim? That's a bit ugly. Given this is best effort, we could avoid this by changing it to something like: longest = 0; do { lock agf force log if (!longest) longest = agf->longest init cursor do { xfs_alloc_lookup_le(longest) alloc_get_rec(&fbno, &flen) check flen busy search discard decrement cursor } while (flen == longest) destroy cursor unlock agf longest = flen; } while(1) This way we walk the tree in a manner that does not hold the agf for extended periods of time, but still catches all the extents of the same size and, when idle, will catch all the extents longer than the given length to discard. If the filesystem is busy, it will have much less impact on it due to the much short AGF hold times. And perhaps the inner loop could simply be terminated on the number of discards issued or a timer to keep the number of log forces down to a sane number (e.g. one every 50ms). Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+02w5+26+fromorbit.com=david@internode.on.net Wed Dec 22 19:48:47 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN1mlEK069219 for ; Wed, 22 Dec 2010 19:48:47 -0600 X-ASG-Debug-ID: 1293069044-60db03b00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D67FB1CDBA2E for ; Wed, 22 Dec 2010 17:50:44 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id zmEIZLOPCFuRSuAX for ; Wed, 22 Dec 2010 17:50:44 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50612975-1927428 for multiple; Thu, 23 Dec 2010 12:20:42 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVaKG-0004lQ-VZ; Thu, 23 Dec 2010 12:50:41 +1100 Date: Thu, 23 Dec 2010 12:50:40 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 1/4] xfs: remove leftovers of old buffer log items in recovery code Subject: Re: [PATCH 1/4] xfs: remove leftovers of old buffer log items in recovery code Message-ID: <20101223015040.GA18264@dastard> References: <20101201220620.340188389@bombadil.infradead.org> <20101201220710.042656730@bombadil.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101201220710.042656730@bombadil.infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail18.adl2.internode.on.net[150.101.137.103] X-Barracuda-Start-Time: 1293069045 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50222 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 05:06:21PM -0500, Christoph Hellwig wrote: > XFS used to support different types of buffer log items long time ago. > Remove the switch statements checking the log item type in various > buffer recovery helpers that were left over from those days and the > rather useless xlog_recover_do_buffer_pass2 wrapper. > > Signed-off-by: Christoph Hellwig Looks good. This should have been done when all the old unsupported buffer formats were removed. Reviewed-by: Dave Chinner -- Dave Chinner david@fromorbit.com From laurent+xfs@u-picardie.fr Wed Dec 22 19:51:14 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN1pDo8069794 for ; Wed, 22 Dec 2010 19:51:14 -0600 X-ASG-Debug-ID: 1293069190-0ea403c90000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.u-picardie.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0E199219DFE for ; Wed, 22 Dec 2010 17:53:10 -0800 (PST) Received: from mx1.u-picardie.fr (mx1.u-picardie.fr [193.49.184.7]) by cuda.sgi.com with ESMTP id dPKCeVAW1RlN0ykj for ; Wed, 22 Dec 2010 17:53:10 -0800 (PST) Received: from mailx.u-picardie.fr (oban.u-picardie.fr [193.49.184.8]) by mx1.u-picardie.fr (Postfix) with ESMTP id 8B5A678016 for ; Thu, 23 Dec 2010 02:53:09 +0100 (CET) Received: from passoire.u-picardie.fr (passoire.u-picardie.fr [193.49.184.121]) by mailx.u-picardie.fr (Postfix) with ESMTP id 69855580F8 for ; Thu, 23 Dec 2010 02:53:09 +0100 (CET) X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Scanned: Debian amavisd-new at u-picardie.fr Received: from mailx.u-picardie.fr ([193.49.184.8]) by passoire.u-picardie.fr (passoire.u-picardie.fr [193.49.184.121]) (amavisd-new, port 10024) with LMTP id RHIS5semI6dl for ; Thu, 23 Dec 2010 02:53:08 +0100 (CET) Received: from ezri.u-picardie.fr (ezri.u-picardie.fr [193.49.184.104]) by mailx.u-picardie.fr (Postfix) with ESMTP id 370D558105 for ; Thu, 23 Dec 2010 02:53:08 +0100 (CET) Received: by ezri.u-picardie.fr (Postfix, from userid 1000) id 57A4865B499; Thu, 23 Dec 2010 02:53:08 +0100 (CET) From: laurent+xfs@u-picardie.fr To: xfs@oss.sgi.com X-ASG-Orig-Subj: able to mount a fs, unable to repair it Subject: able to mount a fs, unable to repair it Date: Thu, 23 Dec 2010 02:53:08 +0100 Message-ID: <87r5d9uuez.fsf@ezri.u-picardie.fr> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Barracuda-Connect: mx1.u-picardie.fr[193.49.184.7] X-Barracuda-Start-Time: 1293069191 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=NO_REAL_NAME X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50222 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 NO_REAL_NAME From: does not include a real name X-Virus-Status: Clean Hi ! For a reason all my xfs FS got corrupted at the same time. My setup is: xen host using lvm on top of soft raid6 on top of jbod 3ware connected sata disks. Both the host and the VM fs got corrupted. ATM host is using 2.6.32 (debian/squeeze), xfsprogs are 3.1.4 I've had 2 kinds of corruptions: 1) unable to mount the FS, been able to xfs_repair -L 2) able to mount the FS, xfs_check was reporting errors, unable to xfs_repair the fs For most of the FS, i've managed to either mkfs.xfs or xfs_repair then rsync from the backup. I'm left with my 1.5TB fs for which i also have a full backup, i'm able to mount it (no kernel error or anything when mounting it). xfs_check on this unmounted FS gives errors. xfs_repair (after a long long time) is unable to find a suitable thingie to repair the FS. https://gist.github.com/752411 xfs_{db,check,repair,metadump} results. (haven't checked the memory/disk usage when doing the metadump) I can't really tell why all this happened in the first place. Been having power supply issues some weeks ago, been upgrading from lenny to squeeze, been playing with xen & lxc at the same, been doing my xmas shopping a bit late ! :-) I'd be curious to know how to repair the 1.5TB FS, any idea on what i could do ? TIA -- Laurent From SRS0+Prmc+26+fromorbit.com=david@internode.on.net Wed Dec 22 19:52:41 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN1qfs2070150 for ; Wed, 22 Dec 2010 19:52:41 -0600 X-ASG-Debug-ID: 1293069278-4fd200640000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D4D3E219E0B for ; Wed, 22 Dec 2010 17:54:38 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id seEfTMARvOYESPcv for ; Wed, 22 Dec 2010 17:54:38 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50908728-1927428 for multiple; Thu, 23 Dec 2010 12:24:37 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVaO4-0004lc-5s; Thu, 23 Dec 2010 12:54:36 +1100 Date: Thu, 23 Dec 2010 12:54:36 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 2/4] xfs: use struct list_head for the buf cancel table Subject: Re: [PATCH 2/4] xfs: use struct list_head for the buf cancel table Message-ID: <20101223015436.GB18264@dastard> References: <20101201220620.340188389@bombadil.infradead.org> <20101201220710.254521341@bombadil.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101201220710.254521341@bombadil.infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1293069279 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0002 1.0000 -2.0197 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50222 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 05:06:22PM -0500, Christoph Hellwig wrote: > Signed-off-by: Christoph Hellwig looks good. Reviewed-by: Dave Chinner -- Dave Chinner david@fromorbit.com From SRS0+ai79+26+fromorbit.com=david@internode.on.net Wed Dec 22 19:54:40 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN1se90070584 for ; Wed, 22 Dec 2010 19:54:40 -0600 X-ASG-Debug-ID: 1293069397-175101530000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id AD6AE1CEE045 for ; Wed, 22 Dec 2010 17:56:37 -0800 (PST) Received: from mail.internode.on.net (bld-mail19.adl2.internode.on.net [150.101.137.104]) by cuda.sgi.com with ESMTP id Ws5waSIBIkGrDuhy for ; Wed, 22 Dec 2010 17:56:37 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50296279-1927428 for multiple; Thu, 23 Dec 2010 12:26:36 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVaPy-0004m1-0T; Thu, 23 Dec 2010 12:56:34 +1100 Date: Thu, 23 Dec 2010 12:56:33 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 3/4] xfs: refactor xlog_recover_commit_trans Subject: Re: [PATCH 3/4] xfs: refactor xlog_recover_commit_trans Message-ID: <20101223015633.GC18264@dastard> References: <20101201220620.340188389@bombadil.infradead.org> <20101201220710.454838485@bombadil.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101201220710.454838485@bombadil.infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail19.adl2.internode.on.net[150.101.137.104] X-Barracuda-Start-Time: 1293069398 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50222 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 05:06:23PM -0500, Christoph Hellwig wrote: > Merge the call to xlog_recover_reorder_trans and the loop over the > recovery items from xlog_recover_do_trans into xlog_recover_commit_trans, > and keep the switch statement over the log item types as a separate helper. > > Signed-off-by: Christoph Hellwig Much nicer. With the small "break" fix Alex commented on, it looks good. Reviewed-by: Dave Chinner -- Dave Chinner david@fromorbit.com From SRS0+02w5+26+fromorbit.com=david@internode.on.net Wed Dec 22 20:04:29 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN24Sxf071572 for ; Wed, 22 Dec 2010 20:04:29 -0600 X-ASG-Debug-ID: 1293069985-0cfb02700000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 762E114789A9 for ; Wed, 22 Dec 2010 18:06:26 -0800 (PST) Received: from mail.internode.on.net (bld-mail18.adl2.internode.on.net [150.101.137.103]) by cuda.sgi.com with ESMTP id NpiUX3OPZDB8q5Ke for ; Wed, 22 Dec 2010 18:06:26 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50615217-1927428 for multiple; Thu, 23 Dec 2010 12:36:25 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVaZT-0004n1-Ql; Thu, 23 Dec 2010 13:06:23 +1100 Date: Thu, 23 Dec 2010 13:06:23 +1100 From: Dave Chinner To: Christoph Hellwig Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 4/4] xfs: untangle phase1 vs phase2 recovery helpers Subject: Re: [PATCH 4/4] xfs: untangle phase1 vs phase2 recovery helpers Message-ID: <20101223020623.GD18264@dastard> References: <20101201220620.340188389@bombadil.infradead.org> <20101201220710.647499265@bombadil.infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101201220710.647499265@bombadil.infradead.org> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail18.adl2.internode.on.net[150.101.137.103] X-Barracuda-Start-Time: 1293069987 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0002 1.0000 -2.0196 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50222 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 01, 2010 at 05:06:24PM -0500, Christoph Hellwig wrote: > Dispatch to a different helper for phase1 vs phase2 in xlog_recover_commit_trans > instead of doing it in all the low-level functions. > > Signed-off-by: Christoph Hellwig Good cleanup. That'll make it much easier to work out how to shoe-horn in item readahead to try to minimise log recovery times for large logs... Reviewed-by: Dave Chinner -- Dave Chinner david@fromorbit.com From aelder@sgi.com Wed Dec 22 21:56:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN3u1ML087034 for ; Wed, 22 Dec 2010 21:56:01 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id 8625AAC016 for ; Wed, 22 Dec 2010 19:58:00 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 22 Dec 2010 21:56:17 -0600 Subject: [PATCH 1/5] percpu_counter: fix test in __percpu_counter_add_unless_lt() From: Alex Elder Reply-To: aelder@sgi.com To: XFS Mailing List Content-Type: text/plain; charset="UTF-8" Date: Wed, 22 Dec 2010 21:56:15 -0600 Message-ID: <1293076575.2408.425.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 23 Dec 2010 03:56:17.0431 (UTC) FILETIME=[59E54A70:01CBA255] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean In __percpu_counter_add_unless_lt(), there is a test to see if a call to __percpu_counter_add() can be made, knowing the result will not be less than the given threshhold and the called function will do the addition without taking a lock. Unfortunately, it is using the wrong value in its comparison--the amount to add is not properly being taken into account. As a result, __percpu_counter_add() could end up adding a value when it should not. And even if the result will be non-negative, the called function may take the lock anyway because it does so if the *sum* of the (percpu) delta count and the given amount (and not just the amount alone) is greater than the batch size (or less than its negative). Fix the comparison, and since it __percpu_counter_add() will do the right thing (and might lock anyway), just call it regardless of what amount is getting added. Signed-off-by: Alex Elder --- lib/percpu_counter.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) Index: b/lib/percpu_counter.c =================================================================== --- a/lib/percpu_counter.c +++ b/lib/percpu_counter.c @@ -239,10 +239,10 @@ int __percpu_counter_add_unless_lt(struc goto out; /* - * If the counter is over the threshold and the change is less than the - * batch size, we might be able to avoid locking. + * If the updated counter will be over the threshold we know + * we can safely add, and might be able to avoid locking. */ - if (count > threshold + error && abs(amount) < batch) { + if (count + amount > threshold + error) { __percpu_counter_add(fbc, amount, batch); ret = 1; goto out; From aelder@sgi.com Wed Dec 22 21:56:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN3u1x5087032 for ; Wed, 22 Dec 2010 21:56:01 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id 32D0CAC009 for ; Wed, 22 Dec 2010 19:57:57 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 22 Dec 2010 21:56:08 -0600 Subject: [PATCH 0/5] percpu_counter: modifications to __percpu_counter_add_unless_lt() From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Wed, 22 Dec 2010 21:56:07 -0600 Message-ID: <1293076567.2408.424.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 23 Dec 2010 03:56:09.0024 (UTC) FILETIME=[54E27C00:01CBA255] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This series is based on (i.e., applies on top of) the third patch in Dave Chinner's scalability series (lib: percpu counter add unless less than functionality). I had some questions while reviewing that patch, and after closer inspection I think I found what I think are some problems, and in order to work through them I came up with this patch series to lay out what I think the problems are and my attempt at addressing them. The series has been rearranged a bit since I put it together. Patch 3 includes some background and terminology that might be more useful at the beginning, but I'm leaving it as-is for now. The more I look at the end result of the series the more confident I am that it's correct. However I still need some convincing--either to point out where I've got something wrong, or to affirm that what I have is right. -Alex From aelder@sgi.com Wed Dec 22 21:56:03 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN3u3ve087055 for ; Wed, 22 Dec 2010 21:56:03 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id 26FFDAC016 for ; Wed, 22 Dec 2010 19:58:02 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 22 Dec 2010 21:56:22 -0600 Subject: [PATCH 3/5] percpu_counter: fix error bound used in add_unless_lt function From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Wed, 22 Dec 2010 21:56:21 -0600 Message-ID: <1293076581.2408.430.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 23 Dec 2010 03:56:22.0946 (UTC) FILETIME=[5D2ED020:01CBA255] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean The __percpu_counter_add_unless_lt() function is designed to safely implement a conditional add operation on a percpu_counter, succeeding only if the result of the addition would produce a non-negative result. It goes to great lengths to avoid the need to take a spinlock(), but it currently is much more conservative than it has to be. The change below is simple, but I feel I need to provide a foundation of some background to argue that it is correct. The instantaneous "correct" value of a percpu_counter is the sum of its "aggregate" count value and all of its per-cpu "delta" counter values. This sum, as well as all the counts that comprise it, are all signed values. A global batch size, percpu_counter_batch, is maintained and used to limit how out-of-date the aggregate value is with the correct value of the percpu_counter. The aggregate count value is only updated under protection of a spinlock, and in several places taking the spinlock is avoided by understanding something about the bounds of what the per-cpu deltas could contribute to the percpu_counter's value. The possible range of the correct value of a percpu_counter can be represented as: percpu_counter->count +/- error where "error" is the current sum of all per-cpu deltas. The per-cpu delta values are only ever modified in two ways: they are either zeroed (in percpu_counter_set(), __percpu_counter_add(), and percpu_counter_hotcpu_callback()), or they are assigned a value whose absolute value is no more than the batch size (in __percpu_counter_add()). Therefore, each per-cpu delta value contributes no more than +/- the batch size to the value of the percpu_counter. And since at most num_online_cpus() deltas are maintained, the maximum (absolute) value of "error" is: num_online_cpus() * percpu_counter_batch In other words, the correct value of a percpu_counter can be described as within this range: percpu_counter->count +/- num_online_cpus() * percpu_counter_batch In __percpu_counter_add_unless_lt(), error is computed to be twice the size it needs to be, and this change fixes that. While we're at it, tweak percpu_counter_compare() so it uses a local variable "error" that serves the same purpose as its counterpart in __percpu_counter_add_unless_lt(). Signed-off-by: Alex Elder --- lib/percpu_counter.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) Index: b/lib/percpu_counter.c =================================================================== --- a/lib/percpu_counter.c +++ b/lib/percpu_counter.c @@ -192,10 +192,11 @@ static int __cpuinit percpu_counter_hotc int percpu_counter_compare(struct percpu_counter *fbc, s64 rhs) { s64 count; + s64 error = percpu_counter_batch * num_online_cpus(); count = percpu_counter_read(fbc); /* Check to see if rough count will be sufficient for comparison */ - if (abs(count - rhs) > percpu_counter_batch * num_online_cpus()) { + if (abs(count - rhs) > error) { if (count > rhs) return 1; return -1; @@ -227,7 +228,7 @@ int __percpu_counter_add_unless_lt(struc s64 threshold, s32 batch) { s64 count; - s64 error = 2 * batch * num_online_cpus(); + s64 error = batch * num_online_cpus(); int cpu; int ret = -1; From aelder@sgi.com Wed Dec 22 21:56:03 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN3u323087057 for ; Wed, 22 Dec 2010 21:56:03 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id 77582AC017 for ; Wed, 22 Dec 2010 19:58:02 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 22 Dec 2010 21:56:28 -0600 Subject: [PATCH 2/5] percpu_counter: avoid potential underflow in add_unless_lt From: Alex Elder Reply-To: aelder@sgi.com To: XFS Mailing List Content-Type: text/plain; charset="UTF-8" Date: Wed, 22 Dec 2010 21:56:27 -0600 Message-ID: <1293076587.2408.431.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 23 Dec 2010 03:56:28.0993 (UTC) FILETIME=[60C98310:01CBA255] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean In __percpu_counter_add_unless_lt(), an assumption is made that under certain conditions it's possible to determine that an amount can be safely added to a counter, possibly without having to acquire the lock. This assumption is not valid, however. These lines encode the assumption: if (count + amount > threshold + error) { __percpu_counter_add(fbc, amount, batch); Inside __percpu_counter_add(), the addition is performed without acquiring the lock if the *sum* of the batch size and the CPU-local delta is within the batch size. Otherwise it does the addition after acquiring the lock. The problem is that *that* sum may actually end up being greater than the batch size, forcing the addition to be performed under protection of the lock. And by the time the lock is acquired, the value of fbc->count may have been updated such that adding the given amount allows the result to go negative. Fix this by open-coding the portion of the __percpu_counter_add() that avoids the lock. Signed-off-by: Alex Elder --- lib/percpu_counter.c | 11 ++++++++--- 1 file changed, 8 insertions(+), 3 deletions(-) Index: b/lib/percpu_counter.c =================================================================== --- a/lib/percpu_counter.c +++ b/lib/percpu_counter.c @@ -243,9 +243,14 @@ int __percpu_counter_add_unless_lt(struc * we can safely add, and might be able to avoid locking. */ if (count + amount > threshold + error) { - __percpu_counter_add(fbc, amount, batch); - ret = 1; - goto out; + s32 *pcount = this_cpu_ptr(fbc->counters); + + count = *pcount + amount; + if (abs(count) < batch) { + *pcount = count; + ret = 1; + goto out; + } } /* From aelder@sgi.com Wed Dec 22 21:56:04 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN3u3m9087059 for ; Wed, 22 Dec 2010 21:56:04 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id CAC84AC009 for ; Wed, 22 Dec 2010 19:58:02 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 22 Dec 2010 21:56:39 -0600 Subject: [PATCH 4/5] percpu_counter: tie error bounds more obviously to count values From: Alex Elder Reply-To: aelder@sgi.com To: XFS Mailing List Content-Type: text/plain; charset="UTF-8" Date: Wed, 22 Dec 2010 21:56:38 -0600 Message-ID: <1293076598.2408.433.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 23 Dec 2010 03:56:39.0962 (UTC) FILETIME=[67533FA0:01CBA255] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This change simply moves around the computed error bound used in a few spots so it is more closely associated with the count value. This is based on this interpretation of the correct value of of a percpu_counter: percpu_counter->count +/- error So when thinking about the code, it is useful to think of (count + error) or (count - error) to represent an upper or lower bound of the percpu_counter's value. And this change simply moves things around to match that way of thinking. Doing this made me realize there's another optimization to be made--namely skipping the per-cpu sum if after taking the lock we know the result will be below the threshold. Signed-off-by: Alex Elder --- lib/percpu_counter.c | 32 +++++++++++++++++++++++--------- 1 file changed, 23 insertions(+), 9 deletions(-) Index: b/lib/percpu_counter.c =================================================================== --- a/lib/percpu_counter.c +++ b/lib/percpu_counter.c @@ -234,16 +234,21 @@ int __percpu_counter_add_unless_lt(struc preempt_disable(); - /* Check to see if rough count will be sufficient for comparison */ + /* + * Check to see if rough count will be sufficient for + * comparison. First, if the upper bound is too low, + * we're done. + */ count = percpu_counter_read(fbc); - if (count + amount < threshold - error) + if (count + error + amount < threshold) goto out; /* - * If the updated counter will be over the threshold we know - * we can safely add, and might be able to avoid locking. + * Next, if the lower bound is above the threshold, we can + * safely add the amount. See if we can do so without + * locking. */ - if (count + amount > threshold + error) { + if (count - error + amount > threshold) { s32 *pcount = this_cpu_ptr(fbc->counters); count = *pcount + amount; @@ -255,12 +260,21 @@ int __percpu_counter_add_unless_lt(struc } /* - * If the result is over the error threshold, we can just add it - * into the global counter ignoring what is in the per-cpu counters - * as they will not change the result of the calculation. + * We're within the error margin, so we need to be more + * precise. Take the lock, get the current count value, and + * check once more whether the result will be outside the + * error threshold. + * + * If we find we can safely add, just add the amount into + * the global counter ignoring what is in the per-cpu + * counters as they will not change the result of the + * calculation. */ spin_lock(&fbc->lock); - if (fbc->count + amount > threshold + error) { + if (fbc->count + error + amount < threshold) + goto out_unlock; + + if (fbc->count - error + amount > threshold) { fbc->count += amount; ret = 1; goto out_unlock; From aelder@sgi.com Wed Dec 22 21:56:05 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN3u4iB087069 for ; Wed, 22 Dec 2010 21:56:04 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id 3AC05AC016 for ; Wed, 22 Dec 2010 19:58:03 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 22 Dec 2010 21:56:43 -0600 Subject: [PATCH 5/5] percpu_counter: only disable preemption if needed in add_unless_lt() From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Wed, 22 Dec 2010 21:56:42 -0600 Message-ID: <1293076602.2408.434.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 23 Dec 2010 03:56:43.0634 (UTC) FILETIME=[69838D20:01CBA255] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean In __percpu_counter_add_unless_lt() we don't need to disable preemption unless we're manipulating a per-cpu variable. That only happens in a limited case, so narrow the scope of that preemption to surround that case. This makes the "out" label rather unnecessary, so replace a couple "goto out" calls to just return. Signed-off-by: Alex Elder --- lib/percpu_counter.c | 21 ++++++++++----------- 1 file changed, 10 insertions(+), 11 deletions(-) Index: b/lib/percpu_counter.c =================================================================== --- a/lib/percpu_counter.c +++ b/lib/percpu_counter.c @@ -232,8 +232,6 @@ int __percpu_counter_add_unless_lt(struc int cpu; int ret = -1; - preempt_disable(); - /* * Check to see if rough count will be sufficient for * comparison. First, if the upper bound is too low, @@ -241,7 +239,7 @@ int __percpu_counter_add_unless_lt(struc */ count = percpu_counter_read(fbc); if (count + error + amount < threshold) - goto out; + return -1; /* * Next, if the lower bound is above the threshold, we can @@ -251,12 +249,15 @@ int __percpu_counter_add_unless_lt(struc if (count - error + amount > threshold) { s32 *pcount = this_cpu_ptr(fbc->counters); + preempt_disable(); + pcount = this_cpu_ptr(fbc->counters); count = *pcount + amount; if (abs(count) < batch) { *pcount = count; - ret = 1; - goto out; + preempt_enable(); + return 1; } + preempt_enable(); } /* @@ -281,10 +282,9 @@ int __percpu_counter_add_unless_lt(struc } /* - * Result is withing the error margin. Run an open-coded sum of the - * per-cpu counters to get the exact value at this point in time, - * and if the result greater than the threshold, add the amount to - * the global counter. + * Now add in all the per-cpu counters to compute the exact + * value at this point in time, and if the result greater + * than the threshold, add the amount to the global counter. */ count = fbc->count; for_each_online_cpu(cpu) { @@ -301,8 +301,7 @@ int __percpu_counter_add_unless_lt(struc } out_unlock: spin_unlock(&fbc->lock); -out: - preempt_enable(); + return ret; } EXPORT_SYMBOL(__percpu_counter_add_unless_lt); From sandeen@sandeen.net Wed Dec 22 22:02:54 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN42rYT088423 for ; Wed, 22 Dec 2010 22:02:54 -0600 X-ASG-Debug-ID: 1293077091-1a8400190000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 253AC1CEE682 for ; Wed, 22 Dec 2010 20:04:51 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id asBUDujRDirKSz3h for ; Wed, 22 Dec 2010 20:04:51 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id A54C44882007; Wed, 22 Dec 2010 22:04:50 -0600 (CST) Message-ID: <4D12CA62.20902@sandeen.net> Date: Wed, 22 Dec 2010 22:04:50 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: laurent+xfs@u-picardie.fr CC: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: able to mount a fs, unable to repair it Subject: Re: able to mount a fs, unable to repair it References: <87r5d9uuez.fsf@ezri.u-picardie.fr> In-Reply-To: <87r5d9uuez.fsf@ezri.u-picardie.fr> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1293077092 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.42 X-Barracuda-Spam-Status: No, SCORE=-1.42 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50228 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/22/10 7:53 PM, laurent+xfs@u-picardie.fr wrote: > > Hi ! > > For a reason all my xfs FS got corrupted at the same time. > My setup is: xen host using lvm on top of soft raid6 on top of jbod > 3ware connected sata disks. > Both the host and the VM fs got corrupted. > > ATM host is using 2.6.32 (debian/squeeze), xfsprogs are 3.1.4 > > I've had 2 kinds of corruptions: > 1) unable to mount the FS, been able to xfs_repair -L > 2) able to mount the FS, xfs_check was reporting errors, unable to > xfs_repair the fs > > For most of the FS, i've managed to either mkfs.xfs or xfs_repair then > rsync from the backup. > > I'm left with my 1.5TB fs for which i also have a full backup, i'm > able to mount it (no kernel error or anything when > mounting it). xfs_check on this unmounted FS gives errors. xfs_repair > (after a long long time) is unable to find a suitable thingie to > repair the FS. > > https://gist.github.com/752411 xfs_{db,check,repair,metadump} results. > (haven't checked the memory/disk usage when doing the metadump) > > I can't really tell why all this happened in the first place. > Been having power supply issues some weeks ago, been upgrading from > lenny to squeeze, been playing with xen & lxc at the same, been doing > my xmas shopping a bit late ! :-) > > I'd be curious to know how to repair the 1.5TB FS, any idea on what i > could do ? > > TIA > for the image that segfaults, I'd say make an xfs_metadump and provide it for analysis, if the latest xfsprogs xfs_repair still segfaults. -Eric From yad.naveen@gmail.com Wed Dec 22 23:17:44 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM, T_DKIM_INVALID autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN5HhU5099491 for ; Wed, 22 Dec 2010 23:17:44 -0600 X-ASG-Debug-ID: 1293081580-207202130000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qy0-f181.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2C46114794C4 for ; Wed, 22 Dec 2010 21:19:41 -0800 (PST) Received: from mail-qy0-f181.google.com (mail-qy0-f181.google.com [209.85.216.181]) by cuda.sgi.com with ESMTP id Z7MqqXUnF6pZLitu for ; Wed, 22 Dec 2010 21:19:41 -0800 (PST) Received: by qyk12 with SMTP id 12so6336304qyk.5 for ; Wed, 22 Dec 2010 21:19:40 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:content-type :content-transfer-encoding; bh=mqdMQDBG3TqXj6N9Y+Be4Ww971+Qoh6e7H8Qwz6Glww=; b=cl5qwhac1EyU49+Lfar2hQWpTVD6qLDuwfXJBKY8X7/qoya8z4wnLKophLzGi1+FXJ vi5jJzs80iIWIm/PxzTKEtA5w0CrV6wHxqoW02Fqpi5vpEo1DMKtB87ewR7xykMRDyzU fJsWTo7Ifo/dSz00RgId5if4JaPgy4NV36HSU= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :content-type:content-transfer-encoding; b=h08GyHnmeTSqp9mXNZ4Z15xSxcX8of115xoznRfsb1U6fxms1oM/DSi7pX6kSXQ53U c0ADmz0qOPTpAVHYmRDWRjj4m93KcYg6EwPy7tTAvfNpA6M9W+tyGvc0PQVksGRa5VY0 GV4BZiPF2l69QbTydvlGE8l9SHTZFpcx/jGok= MIME-Version: 1.0 Received: by 10.229.84.147 with SMTP id j19mr6693647qcl.210.1293081580500; Wed, 22 Dec 2010 21:19:40 -0800 (PST) Received: by 10.229.75.13 with HTTP; Wed, 22 Dec 2010 21:19:40 -0800 (PST) In-Reply-To: References: <20101221213101.GA4907@dastard> <20101222053730.GG4907@dastard> Date: Thu, 23 Dec 2010 10:49:40 +0530 Message-ID: X-ASG-Orig-Subj: Re: Issue on kernel 2.6.35.9 vanilla Subject: Re: Issue on kernel 2.6.35.9 vanilla From: naveen yadav To: Dave Chinner , xfs@oss.sgi.com Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: mail-qy0-f181.google.com[209.85.216.181] X-Barracuda-Start-Time: 1293081582 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M, DKIM_SIGNED, DKIM_VERIFIED X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50233 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hi Dave, The question you ask about log difference, the reason is I just reboot my PC and again reconnect my corrupted disk again, FYI, I already send rest of info in my previous mail, If you need more info, i will provide Thanks On Wed, Dec 22, 2010 at 12:30 PM, naveen yadav wrote= : > Thanks a lot Dave, > > Please find attached log for command xfs_repair -n. > > Thanks a lot > > On Wed, Dec 22, 2010 at 11:07 AM, Dave Chinner wrot= e: >> On Wed, Dec 22, 2010 at 10:27:16AM +0530, naveen yadav wrote: >>> Hi Dave, >>> >>> Please find attached log as suggested by you. >>> >>> Kind regards >>> Naveen >>> >>> On Wed, Dec 22, 2010 at 3:01 AM, Dave Chinner wro= te: >>> > On Tue, Dec 21, 2010 at 07:41:51PM +0530, naveen yadav wrote: >>> >> Hi all, >>> >> >>> >> We have one disk that got corrupted, when I connect to my PC, havein= g >>> >> kernel version(2.6.35.9). >>> >> The Disk mount well, but when i do 'ls; command it hangs. >>> > >>> > ls shouldn't hang. This should return: >>> > >>> >> Please find the dmesg. >>> >> /0x22 [xfs] >>> >> =A0[] xfs_da_do_buf+0x582/0x628 [xfs] >>> >> =A0[] ? xfs_da_read_buf+0x1d/0x22 [xfs] >>> >> =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] >>> >> =A0[] ? xfs_da_read_buf+0x1d/0x22 [xfs] >>> >> =A0[] xfs_da_read_buf+0x1d/0x22 [xfs] >>> >> =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] >>> >> =A0[] xfs_da_node_lookup_int+0x52/0x207 [xfs] >> ..... >>> >> c2d9d000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff =A0.......= ......... >>> >> Filesystem "sdb2": XFS internal error xfs_da_do_buf(2) at line 2113 = of >>> >> file fs/xfs/xfs_da_btree.c. =A0Caller 0xe0dfd3ce >> >> This is not in your dmesg log. When did it actually happen? Before >> the hung task timer started to trip? From your log: >> >> scsi 5:0:0:0: Direct-Access =A0 =A0 SanDisk =A0Cruzer Blade =A0 =A0 1.00= PQ: 0 ANSI: 2 >> sd 5:0:0:0: Attached scsi generic sg1 type 0 >> sd 5:0:0:0: [sdb] 15625216 512-byte logical blocks: (8.00 GB/7.45 GiB) >> sd 5:0:0:0: [sdb] Write Protect is off >> sd 5:0:0:0: [sdb] Mode Sense: 03 00 00 00 >> sd 5:0:0:0: [sdb] Assuming drive cache: write through >> sd 5:0:0:0: [sdb] Assuming drive cache: write through >> =A0sdb: sdb1 sdb2 >> sd 5:0:0:0: [sdb] Assuming drive cache: write through >> sd 5:0:0:0: [sdb] Attached SCSI removable disk >> SELinux: initialized (dev sdb1, type vfat), uses genfs_contexts >> XFS mounting filesystem sdb2 >> Starting XFS recovery on filesystem: sdb2 (logdev: internal) >> Ending XFS recovery on filesystem: sdb2 (logdev: internal) >> SELinux: initialized (dev sdb2, type xfs), uses xattr >> INFO: task gvfs-gdu-volume:2311 blocked for more than 120 seconds. >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message= . >> gvfs-gdu-volu D 00000026 =A0 =A0 0 =A02311 =A0 =A0 =A01 0x00000080 >> =A0c6cf9b2c 00000086 a41cc623 00000026 c0a25e00 c0a25e00 c0a25e00 c0a25e= 00 >> =A0d1290f54 c0a25e00 c0a25e00 000336ad 00000000 cd871c00 00000026 d1290c= d0 >> =A000000000 cd8d2a08 cd8d2a00 7fffffff 7fffffff c6cf9b70 c0781c43 000000= 00 >> Call Trace: >> =A0[] schedule_timeout+0x1b/0x95 >> =A0[] __down_common+0x82/0xb9 >> =A0[] ? _xfs_buf_find+0x122/0x1b8 [xfs] >> =A0[] __down+0x17/0x19 >> =A0[] down+0x27/0x37 >> =A0[] xfs_buf_lock+0x67/0x93 [xfs] >> =A0[] _xfs_buf_find+0x122/0x1b8 [xfs] >> =A0[] xfs_buf_get+0x60/0x149 [xfs] >> =A0[] xfs_buf_read+0x22/0xb0 [xfs] >> =A0[] xfs_trans_read_buf+0x53/0x2e9 [xfs] >> =A0[] xfs_da_do_buf+0x411/0x628 [xfs] >> =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] >> =A0[] xfs_da_read_buf+0x1d/0x22 [xfs] >> =A0[] ? xfs_da_node_lookup_int+0x52/0x207 [xfs] >> =A0[] xfs_da_node_lookup_int+0x52/0x207 [xfs] >> =A0[] xfs_dir2_node_lookup+0x5f/0xee [xfs] >> =A0[] xfs_dir_lookup+0xde/0x110 [xfs] >> =A0[] xfs_lookup+0x50/0x9f [xfs] >> =A0[] xfs_vn_lookup+0x3e/0x76 [xfs] >> =A0[] do_lookup+0xc9/0x139 >> =A0[] do_last+0x186/0x49f >> =A0[] do_filp_open+0x1bd/0x459 >> =A0[] ? timekeeping_get_ns+0x16/0x54 >> =A0[] ? might_fault+0x1e/0x20 >> =A0[] ? alloc_fd+0x58/0xbe >> =A0[] do_sys_open+0x4d/0xe4 >> =A0[] ? audit_syscall_entry+0x12a/0x14c >> =A0[] sys_open+0x23/0x2b >> =A0[] sysenter_do_call+0x12/0x2d >> >> You've got a gvfs (gnome-vfs?) process stuck waiting on a buffer >> lock. The onyl way I can see it getting stuck here is if it the >> buffer has not been unlocked somewhere. It's possible that it is >> stuck on the same buffer that the corruption error came from, >> but the corrupted buffer is unlocked in the error handling path. >> what does `xfs_repair -n` tell about the filesytsem? >> >> FWIW, later on: >> >> ...... >> INFO: task gvfsd-trash:1891 blocked for more than 120 seconds. >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message= . >> gvfsd-trash =A0 D 00000026 =A0 =A0 0 =A01891 =A0 =A0 =A01 0x00000080 >> >> gvfs-trashd gets stuck on a mutex during a path walk which is >> probably held by the above directory read. >> >> .... >> INFO: task gvfs-gdu-volume:2321 blocked for more than 120 seconds. >> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message= . >> gvfs-gdu-volu D 00000026 =A0 =A0 0 =A02321 =A0 =A0 =A01 0x00000088 >> >> As does this one. >> >> .... >> >> gvfs-gdu-volu D 00000026 =A0 =A0 0 =A01889 =A0 =A0 =A01 0x00000080 >> =A0cda3df10 00000086 a422923c 00000026 c0a25e00 c0a25e00 c0a25e00 c0a25e= 00 >> =A0cd936904 c0a25e00 c0a25e00 000b9ea1 00000000 cda24400 00000026 cd9366= 80 >> =A000ae3000 c34c01a4 c34c019c cd936680 c34c01a0 cda3df44 c0782093 c34c01= ac >> Call Trace: >> =A0[] __mutex_lock_common+0xe8/0x137 >> =A0[] __mutex_lock_killable_slowpath+0x17/0x19 >> =A0[] ? mutex_lock_killable+0x32/0x45 >> =A0[] mutex_lock_killable+0x32/0x45 >> =A0[] vfs_readdir+0x46/0x94 >> =A0[] ? filldir64+0x0/0xf5 >> =A0[] sys_getdents64+0x72/0xb2 >> =A0[] sysenter_do_call+0x12/0x2d >> >> And this one, too. >> >> ..... >> ls =A0 =A0 =A0 =A0 =A0 =A0D 00000000 =A0 =A0 0 =A02325 =A0 2044 0x000000= 80 >> =A0c6d03f10 00200086 00000000 00000000 c0a25e00 c0a25e00 c0a25e00 c0a25e= 00 >> =A0cdacb5c4 c0a25e00 c0a25e00 d6779fa1 00000029 00000000 00000029 cdacb3= 40 >> =A000000001 c34c01a4 c34c019c cdacb340 c34c01a0 c6d03f44 c0782093 c34c01= ac >> Call Trace: >> =A0[] __mutex_lock_common+0xe8/0x137 >> =A0[] __mutex_lock_killable_slowpath+0x17/0x19 >> =A0[] ? mutex_lock_killable+0x32/0x45 >> =A0[] mutex_lock_killable+0x32/0x45 >> =A0[] vfs_readdir+0x46/0x94 >> =A0[] ? filldir64+0x0/0xf5 >> =A0[] sys_getdents64+0x72/0xb2 >> =A0[] sysenter_do_call+0x12/0x2d >> >> And finally, there is an ls process that is hung, stuck on a >> directory mutex. Is this the one you were seeing hang rather than >> whatever generated the corrupion report? >> >> Cheers, >> >> Dave. >> -- >> Dave Chinner >> david@fromorbit.com >> > From SRS0+Prmc+26+fromorbit.com=david@internode.on.net Thu Dec 23 00:04:59 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN64w2F108865 for ; Thu, 23 Dec 2010 00:04:59 -0600 X-ASG-Debug-ID: 1293084415-47ff017c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E7D4E1479154 for ; Wed, 22 Dec 2010 22:06:55 -0800 (PST) Received: from mail.internode.on.net (bld-mail12.adl6.internode.on.net [150.101.137.97]) by cuda.sgi.com with ESMTP id EHHKAFOUpYqt8cLi for ; Wed, 22 Dec 2010 22:06:55 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50934656-1927428 for multiple; Thu, 23 Dec 2010 16:36:54 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVeKC-000559-H3; Thu, 23 Dec 2010 17:06:52 +1100 Date: Thu, 23 Dec 2010 17:06:52 +1100 From: Dave Chinner To: Alex Elder Cc: XFS Mailing List X-ASG-Orig-Subj: Re: [PATCH 1/5] percpu_counter: fix test in __percpu_counter_add_unless_lt() Subject: Re: [PATCH 1/5] percpu_counter: fix test in __percpu_counter_add_unless_lt() Message-ID: <20101223060652.GE18264@dastard> References: <1293076575.2408.425.camel@doink> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1293076575.2408.425.camel@doink> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail12.adl6.internode.on.net[150.101.137.97] X-Barracuda-Start-Time: 1293084416 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50237 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 22, 2010 at 09:56:15PM -0600, Alex Elder wrote: > In __percpu_counter_add_unless_lt(), there is a test to see if > a call to __percpu_counter_add() can be made, knowing the result > will not be less than the given threshhold and the called function > will do the addition without taking a lock. > > Unfortunately, it is using the wrong value in its comparison--the > amount to add is not properly being taken into account. As a > result, __percpu_counter_add() could end up adding a value when it > should not. And even if the result will be non-negative, the called > function may take the lock anyway because it does so if the *sum* of > the (percpu) delta count and the given amount (and not just the amount > alone) is greater than the batch size (or less than its negative). > > Fix the comparison, and since it __percpu_counter_add() will do > the right thing (and might lock anyway), just call it regardless > of what amount is getting added. > > Signed-off-by: Alex Elder > > --- > lib/percpu_counter.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > Index: b/lib/percpu_counter.c > =================================================================== > --- a/lib/percpu_counter.c > +++ b/lib/percpu_counter.c > @@ -239,10 +239,10 @@ int __percpu_counter_add_unless_lt(struc > goto out; > > /* > - * If the counter is over the threshold and the change is less than the > - * batch size, we might be able to avoid locking. > + * If the updated counter will be over the threshold we know > + * we can safely add, and might be able to avoid locking. > */ > - if (count > threshold + error && abs(amount) < batch) { > + if (count + amount > threshold + error) { > __percpu_counter_add(fbc, amount, batch); > ret = 1; > goto out; What you have is what I first implemented following your exact logic. However, after having several assert failures n the XFS code, I realised that the logic fails when there are concurrent modifications with abs(amount) > batch. To demonstrate, take the initial conditions: threshold = 0 amount = -39 (for ease of maths) batch = 32 error = 256 (2 * 32 * 4 cpus) with the per CPU counter values: fbc->count = 296 CPU 0 1 2 3 value -31 -31 -31 -31 And the start the concurrent modification such that every racing CPU sees fbc->count = 296 at their initial sample. All evaluate it as: count = 296 if (296 - 39 > 0 + 256) { and so take the __percpu_counter_add() path. Assuming CPUs 1-3 complete before CPU 0, the counter changes value like: cpu 1 pcp_cnt_add_lt(-39) CPU 0 1 2 3 value -31 0 -31 -31 fbc->count = 216 cpu 2 pcp_cnt_add_lt(-39) CPU 0 1 2 3 value -31 0 0 -31 fbc->count = 136 cpu 3 pcp_cnt_add_lt(-39) CPU 0 1 2 3 value -31 0 0 0 fbc->count = 56 And the we run the counter add on CPU 0: __percpu_counter_add(fbc, -39, 32); CPU 0 1 2 3 value 0 0 0 0 fbc->count = -24 And we've just blown through the threshold. We modified the counter and pushed the result less than the threshold which we are not supposed to be, and worst yet is the fact we returning a positive number indicating that we _didn't_ bust the threshold. Analysis of the failures lead me to this lead me to this logic for the unlocked check in my proposed patch: We can do unlocked modifications concurrently on all CPUs IFF 1. the code cannot be preempted between sampling fbc->count and calling __percpu_counter_add() 2. -batch < amount < batch 3. the error bound is set to 2 * batch * nr_cpus To demonstrate the worst case initial conditions, but being bound by the above rules: threshold = 0 amount = -31 batch = 32 error = 256 (2 * 32 * 4 cpus) per CPU counters are at worst case lower edge for lt detection: CPU 0 1 2 3 value -31 -31 -31 -31 fbc->count = 258 and the racing CPUs are all doing equivalent add_unless_lt of -31. Every racing CPU sees fbc->count = 258 at their initial sample. what we end up with is: CPU 0: Racing CPUs count = 258 if (258 > 0 + 256) { cpu 1 pcp_cnt_add_lt(-31) CPU 0 1 2 3 value -31 0 -31 -31 fbc->count = 196 cpu 2 pcp_cnt_add_lt(-31) CPU 0 1 2 3 value -31 0 0 -31 fbc->count = 134 cpu 3 pcp_cnt_add_lt(-31) CPU 0 1 2 3 value -31 0 0 0 fbc->count = 70 __percpu_counter_add(fbc, -31, 32); CPU 0 1 2 3 value 0 0 0 0 fbc->count = 6 And so the return value of 1 is valid because 6 > 0. Indeed, looking at this I can probably change the rule to -batch <= amount <= batch, because the above with amount = -32 would give and end value of fbc->count = 2.... Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+02w5+26+fromorbit.com=david@internode.on.net Thu Dec 23 00:29:45 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN6TimX113010 for ; Thu, 23 Dec 2010 00:29:45 -0600 X-ASG-Debug-ID: 1293085901-693101d90000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 592CE1CEEF89 for ; Wed, 22 Dec 2010 22:31:41 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id jZRLEeeRSJYZR9sV for ; Wed, 22 Dec 2010 22:31:41 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 50826503-1927428 for multiple; Thu, 23 Dec 2010 17:01:40 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVeiB-00058b-1W; Thu, 23 Dec 2010 17:31:39 +1100 Date: Thu, 23 Dec 2010 17:31:38 +1100 From: Dave Chinner To: Alex Elder Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 5/5] percpu_counter: only disable preemption if needed in add_unless_lt() Subject: Re: [PATCH 5/5] percpu_counter: only disable preemption if needed in add_unless_lt() Message-ID: <20101223063138.GF18264@dastard> References: <1293076602.2408.434.camel@doink> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1293076602.2408.434.camel@doink> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1293085903 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50238 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 22, 2010 at 09:56:42PM -0600, Alex Elder wrote: > In __percpu_counter_add_unless_lt() we don't need to disable > preemption unless we're manipulating a per-cpu variable. That only > happens in a limited case, so narrow the scope of that preemption to > surround that case. This makes the "out" label rather unnecessary, > so replace a couple "goto out" calls to just return. > > Signed-off-by: Alex Elder > > --- > lib/percpu_counter.c | 21 ++++++++++----------- > 1 file changed, 10 insertions(+), 11 deletions(-) > > Index: b/lib/percpu_counter.c > =================================================================== > --- a/lib/percpu_counter.c > +++ b/lib/percpu_counter.c > @@ -232,8 +232,6 @@ int __percpu_counter_add_unless_lt(struc > int cpu; > int ret = -1; > > - preempt_disable(); > - > /* > * Check to see if rough count will be sufficient for > * comparison. First, if the upper bound is too low, > @@ -241,7 +239,7 @@ int __percpu_counter_add_unless_lt(struc > */ > count = percpu_counter_read(fbc); > if (count + error + amount < threshold) > - goto out; > + return -1; > > /* > * Next, if the lower bound is above the threshold, we can > @@ -251,12 +249,15 @@ int __percpu_counter_add_unless_lt(struc > if (count - error + amount > threshold) { > s32 *pcount = this_cpu_ptr(fbc->counters); > > + preempt_disable(); > + pcount = this_cpu_ptr(fbc->counters); > count = *pcount + amount; > if (abs(count) < batch) { > *pcount = count; > - ret = 1; > - goto out; > + preempt_enable(); > + return 1; > } > + preempt_enable(); > } Regardless of the other changes, this is not valid. That is: amount = -1; count = fbc->count; ..... count (i.e lots more than error will catch), so the current value of count in this context is wrong and cannot be trusted> if (count - error + amount > threshold) { .... } Effectively, if we want to be able to use lockless optimisations, we need to ensure that the value of the global counter that we read remains within the given error bounds until we have finished making the lockless modification. That is done via disabling preemption across the entire function... Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+02w5+26+fromorbit.com=david@internode.on.net Thu Dec 23 00:38:03 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN6c2KV114698 for ; Thu, 23 Dec 2010 00:38:03 -0600 X-ASG-Debug-ID: 1293086399-47ff03000000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9D0A8147954B for ; Wed, 22 Dec 2010 22:40:00 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id wAjUc8V3f66hIMeb for ; Wed, 22 Dec 2010 22:40:00 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 51337956-1927428 for multiple; Thu, 23 Dec 2010 17:09:58 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PVeqD-00059R-8c; Thu, 23 Dec 2010 17:39:57 +1100 Date: Thu, 23 Dec 2010 17:39:57 +1100 From: Dave Chinner To: Alex Elder Cc: XFS Mailing List X-ASG-Orig-Subj: Re: [PATCH 2/5] percpu_counter: avoid potential underflow in add_unless_lt Subject: Re: [PATCH 2/5] percpu_counter: avoid potential underflow in add_unless_lt Message-ID: <20101223063957.GG18264@dastard> References: <1293076587.2408.431.camel@doink> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1293076587.2408.431.camel@doink> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1293086401 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50239 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 22, 2010 at 09:56:27PM -0600, Alex Elder wrote: > In __percpu_counter_add_unless_lt(), an assumption is made that > under certain conditions it's possible to determine that an amount > can be safely added to a counter, possibly without having to acquire > the lock. This assumption is not valid, however. > > These lines encode the assumption: > if (count + amount > threshold + error) { > __percpu_counter_add(fbc, amount, batch); > > Inside __percpu_counter_add(), the addition is performed > without acquiring the lock if the *sum* of the batch size > and the CPU-local delta is within the batch size. Otherwise > it does the addition after acquiring the lock. > > The problem is that *that* sum may actually end up being greater > than the batch size, forcing the addition to be performed under > protection of the lock. And by the time the lock is acquired, the > value of fbc->count may have been updated such that adding the given > amount allows the result to go negative. > > Fix this by open-coding the portion of the __percpu_counter_add() > that avoids the lock. > > Signed-off-by: Alex Elder > > --- > lib/percpu_counter.c | 11 ++++++++--- > 1 file changed, 8 insertions(+), 3 deletions(-) > > Index: b/lib/percpu_counter.c > =================================================================== > --- a/lib/percpu_counter.c > +++ b/lib/percpu_counter.c > @@ -243,9 +243,14 @@ int __percpu_counter_add_unless_lt(struc > * we can safely add, and might be able to avoid locking. > */ > if (count + amount > threshold + error) { > - __percpu_counter_add(fbc, amount, batch); > - ret = 1; > - goto out; > + s32 *pcount = this_cpu_ptr(fbc->counters); > + > + count = *pcount + amount; > + if (abs(count) < batch) { > + *pcount = count; > + ret = 1; > + goto out; > + } > } The problem with this is that it never zeros pcount. That means after a bunch of increments or decrements, abs(*pcount) == 31, and ever further increment/decrement will drop through to the path that requires locking. Then we simply have a very expensive global counter. We need to take the lock to zero the pcount value because it has to be added to fbc->count. i.e. if you want this path to remain mostly lockless, then it needs to do exactly what __percpu_counter_add() does.... Cheers, Dave. -- Dave Chinner david@fromorbit.com From jpiszcz@lucidpixels.com Thu Dec 23 03:41:29 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBN9fSUj142175 for ; Thu, 23 Dec 2010 03:41:29 -0600 X-ASG-Debug-ID: 1293097406-110a00f40000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from lucidpixels.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 13ED521AA58 for ; Thu, 23 Dec 2010 01:43:26 -0800 (PST) Received: from lucidpixels.com (lucidpixels.com [75.144.35.66]) by cuda.sgi.com with ESMTP id cYKAdxIaFzH85ltC for ; Thu, 23 Dec 2010 01:43:26 -0800 (PST) Received: by lucidpixels.com (Postfix, from userid 1001) id 256681204B5; Thu, 23 Dec 2010 04:43:26 -0500 (EST) Date: Thu, 23 Dec 2010 04:43:26 -0500 (EST) From: Justin Piszcz To: Dave Chinner cc: Eric Sandeen , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? In-Reply-To: <20101223005630.GJ4907@dastard> Message-ID: References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="655872-1901294152-1293097406=:7452" X-Barracuda-Connect: lucidpixels.com[75.144.35.66] X-Barracuda-Start-Time: 1293097407 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA085 X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50250 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 BSF_SC0_SA085 Custom Rule SA085 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --655872-1901294152-1293097406=:7452 Content-Type: TEXT/PLAIN; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Thu, 23 Dec 2010, Dave Chinner wrote: > On Wed, Dec 22, 2010 at 07:28:29PM -0500, Justin Piszcz wrote: >> >> >> On Thu, 23 Dec 2010, Emmanuel Florac wrote: >> >>> Le Wed, 22 Dec 2010 13:03:13 -0600 vous =E9criviez: >>> >>>> http://xfs.org/index.php/XFS_FAQ#Q:_I_want_to_tune_my_XFS_filesystems_= for_.3Csomething.3E >>>> >>>> which mentions getting your geometry right if it's hardware raid >>>> that can't be detected automatically. >>> >>> Just as a side note : I tried several times to manually set the >>> filesystem layout to precisely match the underlying hardware RAID >>> with sunit and swidth but didn't find that it made a noticeable >>> difference. On my 39.9 TB systems, the default agcount is 39, while the >>> optimum would be (theorically at least) 42. >> >> Hi, I concur, for hardware raid (at least on 3ware cards) I have >> found it makes no difference, thanks for confirming. > > I'd constrain that statement to "no difference for the workloads > and hardware tested". > > Indeed, testing an empty filesystem will often show no difference in > performance, because typically problems don't show up until you've > started to age the filesystem significantly. When the filesystem has > started to age, the difference between having done lots of stripe > unit/width aligned allocation vs none can be very significant.... > > Hence don't assume that because you can't see any difference on a > brand new, empty filesystem there never will be a difference over > the life of the filesytem... > > Cheers, > > Dave. > --=20 > Dave Chinner > david@fromorbit.com > > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs > Hi Dave, So for an 18 disk raid-6 with 256k stripe you would recommend: mkfs.xfs with su=3D256k,sw=3D16 for optimal performance with inode64 mount= =20 option? Justin. --655872-1901294152-1293097406=:7452-- From eflorac@intellique.com Thu Dec 23 06:01:28 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNC1SYt162553 for ; Thu, 23 Dec 2010 06:01:28 -0600 X-ASG-Debug-ID: 1293105803-606200d20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp4-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0DD03147AEF6 for ; Thu, 23 Dec 2010 04:03:24 -0800 (PST) Received: from smtp4-g21.free.fr (smtp4-g21.free.fr [212.27.42.4]) by cuda.sgi.com with ESMTP id t7HClqhBJbZoRnzx for ; Thu, 23 Dec 2010 04:03:24 -0800 (PST) Received: from harpe.intellique.com (unknown [82.225.196.72]) by smtp4-g21.free.fr (Postfix) with ESMTP id 919A34C814D; Thu, 23 Dec 2010 13:03:18 +0100 (CET) Date: Thu, 23 Dec 2010 13:03:22 +0100 From: Emmanuel Florac To: Justin Piszcz Cc: Dave Chinner , Eric Sandeen , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? Message-ID: <20101223130322.28644309@harpe.intellique.com> In-Reply-To: References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.16.6; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp4-g21.free.fr[212.27.42.4] X-Barracuda-Start-Time: 1293105807 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50259 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Thu, 23 Dec 2010 04:43:26 -0500 (EST) Justin Piszcz =E9crivait: > So for an 18 disk raid-6 with 256k stripe you would recommend: >=20 > mkfs.xfs with su=3D256k,sw=3D16 for optimal performance with inode64 > mount option? >=20 Yes that should be the best setting.=20 --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From j.fikar@gmail.com Thu Dec 23 06:30:42 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,FREEMAIL_FROM, J_CHICKENPOX_27,T_DKIM_INVALID,T_TO_NO_BRKTS_FREEMAIL autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNCUfDm167342 for ; 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c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=hPdjmQrCsQhHzfyp9TqYlXS433Xib1IgFMkmt8I7NQWEb3fZUWlhm6aQLAMGUJz9Rj oeqxzV66BZ9CVfoLk+Y3CZB7Qotg5XR2aNUgzyjIgJRo6phN6hxhYMgQRWRKivHpflrM UQdW+oR5ChyRff1xUjh7WqzN9jTgtW6MQXYmQ= MIME-Version: 1.0 Received: by 10.231.19.136 with SMTP id a8mr8053089ibb.73.1293107560341; Thu, 23 Dec 2010 04:32:40 -0800 (PST) Received: by 10.231.206.75 with HTTP; Thu, 23 Dec 2010 04:32:40 -0800 (PST) Date: Thu, 23 Dec 2010 13:32:40 +0100 Message-ID: X-ASG-Orig-Subj: no rw xfs file systems in mtab: /proc/mounts Subject: no rw xfs file systems in mtab: /proc/mounts From: Honza Fikar To: xfs@oss.sgi.com Content-Type: text/plain; charset=UTF-8 X-Barracuda-Connect: mail-iy0-f181.google.com[209.85.210.181] X-Barracuda-Start-Time: 1293107561 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50261 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hi guys, when I try "xfs_fsr -v -d" on my two computers, it says now: no rw xfs file systems in mtab: /proc/mounts while actually there is the LUKS encrypted root: ... /dev/mapper/root / xfs rw,noatime,attr2,inode64,logbufs=8,logbsize=256k,noquota 0 0 ... on the third computer it works as expected, there are two xfs file systems, one of them LUKS encrypted: ... /dev/root / xfs rw,noatime,attr2,delaylog,inode64,logbufs=8,logbsize=256k,noquota 0 0 /dev/mapper/encrypted /home xfs rw,noatime,attr2,delaylog,inode64,logbufs=8,logbsize=256k,sunit=512,swidth=1536,noquota 0 0 ... and it was working some time ago on all the three computers distribution gentoo xfsprogs 3.1.4, but I just tried git version and it's the same kernel 2.6.32, on the third machine 2.6.35 Best regards, Honza From sandeen@sandeen.net Thu Dec 23 09:00:37 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_27 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNF0biv189897 for ; Thu, 23 Dec 2010 09:00:37 -0600 X-ASG-Debug-ID: 1293116555-7f43024b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 35FBD21B9AC for ; Thu, 23 Dec 2010 07:02:35 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id gzxMSkzffRIRB5QE for ; Thu, 23 Dec 2010 07:02:35 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id A094A4815700; Thu, 23 Dec 2010 09:02:35 -0600 (CST) Message-ID: <4D13648B.8000105@sandeen.net> Date: Thu, 23 Dec 2010 09:02:35 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: Honza Fikar CC: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: no rw xfs file systems in mtab: /proc/mounts Subject: Re: no rw xfs file systems in mtab: /proc/mounts References: In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1293116556 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50272 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/23/10 6:32 AM, Honza Fikar wrote: > Hi guys, > > when I try "xfs_fsr -v -d" on my two computers, it says now: > > no rw xfs file systems in mtab: /proc/mounts hm that's a little confusing, what it means is it looked in /proc/mounts and did not find anything, or so it thought. As a result of: 89e4b5bd5615edc584a5111c86f12b4f89f8dd7d xfs_fsr: use /proc/mounts if available What does your /proc/mounts show? -Eric > while actually there is the LUKS encrypted root: > ... > /dev/mapper/root / xfs > rw,noatime,attr2,inode64,logbufs=8,logbsize=256k,noquota 0 0 > ... > > on the third computer it works as expected, there are two xfs file > systems, one of them LUKS encrypted: > ... > /dev/root / xfs > rw,noatime,attr2,delaylog,inode64,logbufs=8,logbsize=256k,noquota 0 0 > /dev/mapper/encrypted /home xfs > rw,noatime,attr2,delaylog,inode64,logbufs=8,logbsize=256k,sunit=512,swidth=1536,noquota > 0 0 > ... > > and it was working some time ago on all the three computers > > distribution gentoo > xfsprogs 3.1.4, but I just tried git version and it's the same > kernel 2.6.32, on the third machine 2.6.35 > > Best regards, > Honza > > _______________________________________________ > xfs mailing list > xfs@oss.sgi.com > http://oss.sgi.com/mailman/listinfo/xfs > From petre.rodan@simplex.ro Thu Dec 23 10:55:15 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_26, J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNGtEFg205855 for ; Thu, 23 Dec 2010 10:55:14 -0600 X-ASG-Debug-ID: 1293123431-2fa8008d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from passage.avira.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0187D1CF4A3A for ; Thu, 23 Dec 2010 08:57:12 -0800 (PST) Received: from passage.avira.com (passage.avira.com [89.238.222.20]) by cuda.sgi.com with ESMTP id CEAVAa8E7ijEjsKf for ; Thu, 23 Dec 2010 08:57:12 -0800 (PST) Received: by passage.avira.com (Postfix/AVIRA, from userid 26) id E13611249FA; Thu, 23 Dec 2010 18:57:10 +0200 (EET) Received: from localhost (localhost [127.0.0.1]) by passage.avira.com (Postfix/AVIRA) with ESMTP id 4D1F41249F9 for ; Thu, 23 Dec 2010 18:57:10 +0200 (EET) Received: from passage.avira.com (localhost [127.0.0.1]) by localhost (AvMailGate-2.1.3-2) id 32035-tE83iY; Thu, 23 Dec 2010 18:57:10 +0200 (EET) Received: from naliboat.bu.avira.com (dasapass.avira.com [89.238.222.18]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail.bu.avira.com", Issuer "Avira Intermediate Certificate Authority 2010-2020" (not verified)) by passage.avira.com (Postfix/AVIRA) with ESMTPS id 40D941249F9 for ; Thu, 23 Dec 2010 18:57:10 +0200 (EET) Received: (qmail 4061 invoked from network); 23 Dec 2010 16:57:10 -0000 Received: from unknown (HELO peter.simplex.ro) (prodan@10.7.0.16) by naliboat.bu.avira.com with ESMTPA; 23 Dec 2010 16:57:10 -0000 Date: Thu, 23 Dec 2010 18:55:32 +0200 From: Petre Rodan To: xfs@oss.sgi.com X-ASG-Orig-Subj: xfssyncd and disk spin down Subject: xfssyncd and disk spin down Message-ID: <20101223165532.GA23813@peter.simplex.ro> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="n8g4imXOkfNTN/H1" Content-Disposition: inline User-Agent: Mutt/1.5.21 (2010-09-15) X-AntiVirus: checked by AntiVir MailGate (version: 2.1.3-2; AVE: 7.9.4.128; VDF: 7.11.0.151; host: passage.avira.com) X-Barracuda-Connect: passage.avira.com[89.238.222.20] X-Barracuda-Start-Time: 1293123433 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50280 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --n8g4imXOkfNTN/H1 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello, I have a problem with a hard drive that never managed to spin down. this dr= ive is a storage space, not a system disk, the only thing that generated wr= ites is the nfs server that exports its contents. it has only one large xfs= partition on it. upon closer inspection it turns out that after the first Write action to th= at partition, an xfssyncd process continues to write to that partition each= 36 seconds and it doesn't stop doing that, even if there are no more Write= s from the exterior. this keeps the drive busy with varying consequences. m= ore about that later. I found that the only easy way to stop the xfssyncd process poking the driv= e is to run a `mount -o remount /mnt/space`. this will silence any internal= xfs process to acessing the drive, thus allowing it to spin down and only = be woken up by a NFS access. here are some simple steps to replicate the problem: # echo 3 > /proc/sys/vm/drop_caches # free cached fs entities=20 # ( blktrace -d /dev/sdb -o - | blkparse -i - ) & # mount -o remount /mnt/space # find /mnt/space/ -type f > /dev/null # generate some non-cached Read req= uests # # absolutely no writes have been performed to the drive,=20 # # it could spin down now if enough time would pass # touch /mnt/space/foo # # process 1352 will start writing to the drive at a 35-36s interval, # # even if there has been no other write request. 8,16 1 36591 6306.873151576 1352 A WBS 976985862 + 2 <- (8,17) 97= 6985799 8,16 1 36592 6306.873152998 1352 Q WBS 976985862 + 2 [xfssyncd/sd= b1] [..] 8,16 1 36600 6342.875151286 1352 A WBS 976985864 + 2 <- (8,17) 97= 6985801 8,16 1 36601 6342.875152938 1352 Q WBS 976985864 + 2 [xfssyncd/sd= b1] [..] 8,16 1 36609 6378.877225211 1352 A WBS 976985866 + 2 <- (8,17) 97= 6985803 8,16 1 36610 6378.877226935 1352 Q WBS 976985866 + 2 [xfssyncd/sd= b1] there was no file at or near the 976985799 inode (I presume that's an inode= ?) I found that the only way to stop it is to remount the partition. I also tr= ied sync(1), but to no avail.=20 so is there an XFS option somewhere that would make the filesystem be more = forgiving with the hardware beneath it? without loosing the journal of cour= se. I'm using a vanilla 2.6.36.2 kernel patched with grsecurity, default mkfs.x= fs options, rw,nosuid,nodev,noexec,noatime,attr2,noquota mount options, and= xfs_info looks like this: meta-data=3D/dev/sdb1 isize=3D256 agcount=3D4, agsize=3D610= 47500 blks =3D sectsz=3D512 attr=3D2 data =3D bsize=3D4096 blocks=3D244190000, imaxp= ct=3D25 =3D sunit=3D0 swidth=3D0 blks naming =3Dversion 2 bsize=3D4096 ascii-ci=3D0 log =3Dinternal bsize=3D4096 blocks=3D32768, version= =3D2 =3D sectsz=3D512 sunit=3D0 blks, lazy-coun= t=3D0 realtime =3Dnone extsz=3D4096 blocks=3D0, rtextents=3D0 a probably related issue is with modern Western Digital/Hitachi hard drives= that use a Ramp load/unload technology that automatically parks the heads = at stupidly small inactivity intervals (some small as 8 seconds), so look w= hat happens when using such a drive and xfs: # smartctl -a /dev/sda [..] Device Model: WDC WD20EARS-00MVWB0 Serial Number: WD-WCAZA0101731 Firmware Version: 50.0AB50 [..] 4 Start_Stop_Count 0x0032 100 100 000 Old_age Always = - 17 [..] 9 Power_On_Hours 0x0032 096 096 000 Old_age Always = - 3351 [..] 193 Load_Cycle_Count 0x0032 066 066 000 Old_age Always = - 403405 this hard drive has exceeded it's 300k load/unload maximum from the specs i= n only 140 days, which means it was woken up every 30s or so. not willingly. cheers, peter --n8g4imXOkfNTN/H1 Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) iEYEABECAAYFAk0TfwQACgkQixMPpwVd7zHwQgCgg50zqHPI744lJ6fi0/LZVNaO m8cAmgImSrmW9RrM41CH38U4Y2I21CwR =Sv/q -----END PGP SIGNATURE----- --n8g4imXOkfNTN/H1-- From j.fikar@gmail.com Thu Dec 23 11:16:24 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,FREEMAIL_FROM, J_CHICKENPOX_27,T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNHGOcP208777 for ; 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charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable > hm that's a little confusing, what it means is it looked > in /proc/mounts and did not find anything, or so it thought. I agree that it's confusing, while there are xfs mounted rw in /proc/moun= ts > As a result of: >=20 > 89e4b5bd5615edc584a5111c86f12b4f89f8dd7d xfs_fsr: use /proc/mounts if a= vailable I "quickly and dirty" tried to use /etc/mtab instead, but the result is the same. Even tried some old version (3.0.3), which uses mtab and it's the same. > What does your /proc/mounts show? it shows the lines included in the original e-mail, just here it is wrapped, i.e. for the not working case: >> ... >> /dev/mapper/root / xfs >> rw,noatime,attr2,inode64,logbufs=3D8,logbsize=3D256k,noquota 0 0 >> ... and for working case: >> ... >> /dev/root / xfs >> rw,noatime,attr2,delaylog,inode64,logbufs=3D8,logbsize=3D256k,noquota = 0 0 >> /dev/mapper/encrypted /home xfs >> rw,noatime,attr2,delaylog,inode64,logbufs=3D8,logbsize=3D256k,sunit=3D= 512,swidth=3D1536,noquota >> 0 0 >> ... Honza --------------enigAB09642F972D4CDE6BA7CCED Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk0ThFoACgkQp4S3GwoQQ3tFAwCeNk5Z7wYGto9EDUIV+bKtOrvP 2ZkAoMNbpAFK4Lg9XlFyC88t+6jpAORJ =xqkA -----END PGP SIGNATURE----- --------------enigAB09642F972D4CDE6BA7CCED-- From eflorac@intellique.com Thu Dec 23 11:33:45 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNHXj9V211749 for ; Thu, 23 Dec 2010 11:33:45 -0600 X-ASG-Debug-ID: 1293125738-76f001cd0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp3-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 2DCBC21C20E for ; Thu, 23 Dec 2010 09:35:42 -0800 (PST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id 9qkFuW82ULyZEujP for ; Thu, 23 Dec 2010 09:35:42 -0800 (PST) Received: from galadriel.home (unknown [82.235.234.79]) by smtp3-g21.free.fr (Postfix) with ESMTP id 86395A62E2; Thu, 23 Dec 2010 18:35:34 +0100 (CET) Date: Thu, 23 Dec 2010 18:35:31 +0100 From: Emmanuel Florac To: laurent+xfs@u-picardie.fr Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: able to mount a fs, unable to repair it Subject: Re: able to mount a fs, unable to repair it Message-ID: <20101223183531.19464601@galadriel.home> In-Reply-To: <87r5d9uuez.fsf@ezri.u-picardie.fr> References: <87r5d9uuez.fsf@ezri.u-picardie.fr> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp3-g21.free.fr[212.27.42.3] X-Barracuda-Start-Time: 1293125744 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50282 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Thu, 23 Dec 2010 02:53:08 +0100 vous =E9criviez: > For a reason all my xfs FS got corrupted at the same time. > My setup is: xen host using lvm on top of soft raid6 on top of jbod > 3ware connected sata disks. > Both the host and the VM fs got corrupted. RAID-6 is extremely stable on the 3Ware, while software RAID-6 is dubbed experimental in the kernel. Software RAID can provide seducely high performance when running benchmarks, but IMO it doesn't fly when you need your CPU to do some other jobs, like running NFS daemons or even worse, VMs. Under high CPU loads concurrently coming from the software RAID and virtualisation stack, so many things may go wrong... My advice : software RAID stinks under high CPU load/ high IO. Use hardware RAID whenever possible because it provides more predictable performance and remove many weird software interactions from the picture. --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From jpiszcz@lucidpixels.com Thu Dec 23 12:04:13 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNI4CTi216845 for ; Thu, 23 Dec 2010 12:04:13 -0600 X-ASG-Debug-ID: 1293127570-185a01280000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from lucidpixels.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 07DDB21C326 for ; Thu, 23 Dec 2010 10:06:10 -0800 (PST) Received: from lucidpixels.com (lucidpixels.com [75.144.35.66]) by cuda.sgi.com with ESMTP id mTrdWkeF9YfLAEMs for ; Thu, 23 Dec 2010 10:06:10 -0800 (PST) Received: by lucidpixels.com (Postfix, from userid 1001) id 53757120558; Thu, 23 Dec 2010 13:06:10 -0500 (EST) Date: Thu, 23 Dec 2010 13:06:10 -0500 (EST) From: Justin Piszcz To: Dave Chinner cc: Eric Sandeen , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? In-Reply-To: Message-ID: References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed X-Barracuda-Connect: lucidpixels.com[75.144.35.66] X-Barracuda-Start-Time: 1293127571 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50284 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, 23 Dec 2010, Justin Piszcz wrote: Hi, How come parted using (optimal at 1mb alignment is slower than no partition? In addition, sunit and swidth set properly as mentioned earlier appears to be _slower_ than defaults with no partitions. http://home.comcast.net/~jpiszcz/20101223/final.html Justin. From info@haakonsnyc.com Thu Dec 23 12:09:13 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: **** X-Spam-Status: No, score=4.1 required=5.0 tests=BAYES_50,T_URIBL_BLACK_OVERLAP, URIBL_BLACK,URIBL_WS_SURBL autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNI9D0H217800 for ; Thu, 23 Dec 2010 12:09:13 -0600 X-ASG-Debug-ID: 1293127868-76f003590000-w1Z2WR X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from 122893-WEB1.allengoelhost.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id EF94821C352 for ; Thu, 23 Dec 2010 10:11:08 -0800 (PST) Received: from 122893-WEB1.allengoelhost.com (122893-web1.allengoelhost.com [74.205.83.130]) by cuda.sgi.com with ESMTP id PHEBiolGF0ACab1d for ; Thu, 23 Dec 2010 10:11:08 -0800 (PST) Received: from mail pickup service by 122893-WEB1.allengoelhost.com with Microsoft SMTPSVC; Thu, 23 Dec 2010 13:11:15 -0500 thread-index: AcuizMnM6Fme8IESSyS1eKmeIT8Bqg== Thread-Topic: Haakon's Hall From: To: X-ASG-Orig-Subj: Haakon's Hall Subject: Haakon's Hall Date: Thu, 23 Dec 2010 13:11:15 -0500 Message-ID: <071301cba2cc$c9cc2b20$70ea810a@122893WEB1> MIME-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit X-Mailer: Microsoft CDO for Windows 2000 Content-Class: urn:content-classes:message Importance: normal Priority: normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.3168 X-OriginalArrivalTime: 23 Dec 2010 18:11:15.0485 (UTC) FILETIME=[C9EB24D0:01CBA2CC] X-Barracuda-Connect: 122893-web1.allengoelhost.com[74.205.83.130] X-Barracuda-Start-Time: 1293127868 X-Barracuda-Bayes: INNOCENT GLOBAL 0.4407 1.0000 0.0000 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: 0.00 X-Barracuda-Spam-Status: No, SCORE=0.00 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=NO_REAL_NAME X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50284 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 NO_REAL_NAME From: does not include a real name X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hello - This isn't something you're going to hear about from any of the usual gurus. . . This guy is about 11 steps ahead of them. We're talking about 978 dollars per day. . .from a system you ONLY set up ONCE. EVER! You've GOT to see this. http://www.biz2wealth.co.cc/aff.php?e=linux-xfs@oss.sgi.com Lea Smith USA P.S. When you realize how hard you've been working to drive FAR LESS traffic than Mike and Bill your blood just might boil. http://www.biz2wealth.co.cc/aff.php?e=linux-xfs@oss.sgi.com To unsubscribe please send and email to leasmithusa@gmail.com ---------------------------------------- This message sent to you from 'jhonkarlo@gmail.com', courtesy of Haakon's Hall. Visit us at www.haakonsnyc.com From eflorac@intellique.com Thu Dec 23 12:53:57 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNIrvLZ225422 for ; Thu, 23 Dec 2010 12:53:57 -0600 X-ASG-Debug-ID: 1293130553-1cb1006a0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp3-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 426E31CF505A for ; Thu, 23 Dec 2010 10:55:54 -0800 (PST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id mfHU6a4AtR4dfky6 for ; Thu, 23 Dec 2010 10:55:54 -0800 (PST) Received: from galadriel.home (unknown [82.235.234.79]) by smtp3-g21.free.fr (Postfix) with ESMTP id 6AB5CA6281; Thu, 23 Dec 2010 19:55:49 +0100 (CET) Date: Thu, 23 Dec 2010 19:55:44 +0100 From: Emmanuel Florac To: Justin Piszcz Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? Message-ID: <20101223195544.53d45f0b@galadriel.home> In-Reply-To: References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp3-g21.free.fr[212.27.42.3] X-Barracuda-Start-Time: 1293130556 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50288 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Thu, 23 Dec 2010 13:06:10 -0500 (EST) vous =E9criviez: > http://home.comcast.net/~jpiszcz/20101223/final.html >=20 Something's wrong with the file create/stat/delete tests. Did you mount with "nobarrier"?=20 Which drives, controller firmware, raid level, stripe width?=20 BTW don't run only one test, it's meaningless. I always run at least 8 cycles (and up to 30 or 40 cycles) and then calculate the average and standard deviation, because one test among a cycle may vary wildly for some reason. You don't need the "char" tests, that doesn't correspond to any real-life usage pattern. Better run bonnie with the -f option, and -x with some large enough value. --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From jpiszcz@lucidpixels.com Thu Dec 23 13:05:16 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNJ5FDS227823 for ; Thu, 23 Dec 2010 13:05:16 -0600 X-ASG-Debug-ID: 1293131234-7e8c02c20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from lucidpixels.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 99C451CF50F7 for ; Thu, 23 Dec 2010 11:07:14 -0800 (PST) Received: from lucidpixels.com (lucidpixels.com [75.144.35.66]) by cuda.sgi.com with ESMTP id 3RfRCnXqNg1bRrqm for ; Thu, 23 Dec 2010 11:07:14 -0800 (PST) Received: by lucidpixels.com (Postfix, from userid 1001) id B996F120558; Thu, 23 Dec 2010 14:07:13 -0500 (EST) Date: Thu, 23 Dec 2010 14:07:13 -0500 (EST) From: Justin Piszcz To: Emmanuel Florac cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? In-Reply-To: <20101223195544.53d45f0b@galadriel.home> Message-ID: References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> <20101223195544.53d45f0b@galadriel.home> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="655872-897510591-1293131233=:5924" X-Barracuda-Connect: lucidpixels.com[75.144.35.66] X-Barracuda-Start-Time: 1293131234 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50288 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --655872-897510591-1293131233=:5924 Content-Type: TEXT/PLAIN; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Thu, 23 Dec 2010, Emmanuel Florac wrote: > Le Thu, 23 Dec 2010 13:06:10 -0500 (EST) vous =E9criviez: > >> http://home.comcast.net/~jpiszcz/20101223/final.html >> > > Something's wrong with the file create/stat/delete tests. Did you mount > with "nobarrier"? No, default mount options.. Also I just changed it will update the page in a bit, the raid was on balance mode, with performance, the raid-rewrite went to ~420-430MiB/s, muc= h faster. > Which drives, controller firmware, raid level, stripe width? Hitachi 7K3000 7200RPM 3TB Drives Latest firmware, 10.2 I think for the 9750-24ie Raid Level =3D 6 Stripe width =3D 256k (default) > > BTW don't run only one test, it's meaningless. I always run at least 8 > cycles (and up to 30 or 40 cycles) and then calculate the average and > standard deviation, because one test among a cycle may vary wildly for > some reason. You don't need the "char" tests, that doesn't correspond > to any real-life usage pattern. Better run bonnie with the -f option, > and -x with some large enough value. I ran 3 tests and took the average of the 3 runs per each unit test.=20 I use this test because I have been using it for 3-4+ years so I can compar= e=20 apples to apples. If its +++ or blank in the HTML that means it ran too fast for it to measur= e I believe. Main wonder I have is why when the partition is aligned to 1MiB, which is the default in parted 2.2+ I believe, is it slower than with no partitions? I will try again with mode=3Dperformance on the RAID controller.. > > --=20 > ------------------------------------------------------------------------ > Emmanuel Florac | Direction technique > | Intellique > |=09 > | +33 1 78 94 84 02 > ------------------------------------------------------------------------ > --655872-897510591-1293131233=:5924-- From stan@hardwarefreak.com Thu Dec 23 13:27:17 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNJRGEq231359 for ; Thu, 23 Dec 2010 13:27:17 -0600 X-ASG-Debug-ID: 1293132554-423d01d20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id AC846147E486 for ; Thu, 23 Dec 2010 11:29:14 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id buFa7pOr05MtX5CE for ; Thu, 23 Dec 2010 11:29:14 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 1331E6C0B8 for ; Thu, 23 Dec 2010 13:29:14 -0600 (CST) Message-ID: <4D13A30A.3090600@hardwarefreak.com> Date: Thu, 23 Dec 2010 13:29:14 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down References: <20101223165532.GA23813@peter.simplex.ro> In-Reply-To: <20101223165532.GA23813@peter.simplex.ro> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1293132555 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0649 1.0000 -1.6070 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.01 X-Barracuda-Spam-Status: No, SCORE=-1.01 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50289 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Petre Rodan put forth on 12/23/2010 10:55 AM: > this hard drive has exceeded it's 300k load/unload maximum from the specs in only 140 days, which means it was woken up every 30s or so. not willingly. Contact WD and request a warranty replacement for the drive due to exceeding the spec'd cycle max in less than 6 months. They may not honor your request. Whether they do or not, I'd replace the drive as the mechanism obviously has too much wear on it already, and within one year of use will have well over double the spec'd cycles. If you replace it with another 20EARS, replace the firmware immediately as mentioned below to decrease the load/unload rate. (It would be nice if they offered the ability to disable the sleep mode totally, but then it wouldn't be "green" pfft). Modern drives consume so little power compared to CPUs and GPUs I can't understand the big power save quest the HD industry has embarked upon, especially with potential consequences to drive life you and others are seeing. I can understand the need WRT huge drive count enterprise near line disk arrays, but not the average desktop or server. And the EARS series drives are anything but enterprise caliber. Note the power specs for the WD20EARS: Current Requirements 12 VDC Read/Write 296 mA Idle 243 mA Standby 3 mA Sleep 3 mA 5 VDC Read/Write 503 mA Idle 172 mA Standby 160 mA Sleep 160 mA Power Dissipation Read/Write 6.00 Watts Idle 3.70 Watts Standby 0.80 Watts Sleep 0.80 Watts 6 watts maximum draw for read/write and 3.7 watts idle. Sure, the sleep mode consumes 10x less power, but when you're already at less than 4 watts idle it doesn't matter except in huge disk arrays. For comparison, your average dual core cpu today consumes an average of 20-50 watts or more. Power supplies burn more wasted juice than anything, so get a 90% efficiency PSU and disable all the power save features of your disk drives to prolong their lifespan. To replace the 20EARS firmware: From: http://community.wdc.com/t5/Desktop/Green-Caviar-High-Load-Cycle-Cout-after-short-operation-time/td-p/15731/page/2 Re: Green Caviar: High Load Cycle Count after short operation time 04-08-2010 04:03 PM Sorry, but our agent didn't know that this policy was just changed. Current WDIDLE3 works with the RE and GP drives listed below. RE Drives - WD1000FYPS-01ZKB0, WD7500AYPS-01ZKB0, WD7501AYPS-01ZKB0 GP Drives - WD20EADS, WD20EARS, WD15EADS, WD15EARS, WD10EADS, WD10EARS, WD8000AARS, WD7500AADS, WD7500AARS, WD6400AADS, WD6400AARS, WD5000AADS, WD5000AARS WDIDLE3 http://support.wdc.com/product/download.asp?groupid=609&sid=113&lang=en -- Stan From jpiszcz@lucidpixels.com Thu Dec 23 13:27:27 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNJRRL5231393 for ; Thu, 23 Dec 2010 13:27:27 -0600 X-ASG-Debug-ID: 1293132566-236801b60000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from lucidpixels.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 95F251CF5273 for ; Thu, 23 Dec 2010 11:29:26 -0800 (PST) Received: from lucidpixels.com (lucidpixels.com [75.144.35.66]) by cuda.sgi.com with ESMTP id Eb9gdCCkrQOL0pym for ; Thu, 23 Dec 2010 11:29:26 -0800 (PST) Received: by lucidpixels.com (Postfix, from userid 1001) id 2776E120558; Thu, 23 Dec 2010 14:29:26 -0500 (EST) Date: Thu, 23 Dec 2010 14:29:26 -0500 (EST) From: Justin Piszcz To: Emmanuel Florac cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? In-Reply-To: <20101223195544.53d45f0b@galadriel.home> Message-ID: References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> <20101223195544.53d45f0b@galadriel.home> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="655872-795982373-1293132566=:6569" X-Barracuda-Connect: lucidpixels.com[75.144.35.66] X-Barracuda-Start-Time: 1293132566 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50290 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --655872-795982373-1293132566=:6569 Content-Type: TEXT/PLAIN; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE On Thu, 23 Dec 2010, Emmanuel Florac wrote: > Le Thu, 23 Dec 2010 13:06:10 -0500 (EST) vous =E9criviez: > >> http://home.comcast.net/~jpiszcz/20101223/final.html >> Please check the updated page: http://home.comcast.net/~jpiszcz/20101223/final.html Using a partition shows a slight degredation in the re-write speed but an increase in performance for sequential output and input with the mode set to perform. Looks like this is what I will be using as it is the faste= st speeds overall except for the rewrite. Thanks! Justin. --655872-795982373-1293132566=:6569-- From laurent+xfs@u-picardie.fr Thu Dec 23 13:32:44 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNJWh8D232460 for ; Thu, 23 Dec 2010 13:32:44 -0600 X-ASG-Debug-ID: 1293132882-42e0002c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mx1.u-picardie.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C56401CF52A8 for ; Thu, 23 Dec 2010 11:34:42 -0800 (PST) Received: from mx1.u-picardie.fr (mx1.u-picardie.fr [193.49.184.7]) by cuda.sgi.com with ESMTP id NVpati1CUS1j2tsz for ; Thu, 23 Dec 2010 11:34:42 -0800 (PST) Received: from mailx.u-picardie.fr (oban.u-picardie.fr [193.49.184.8]) by mx1.u-picardie.fr (Postfix) with ESMTP id D8238782BB; Thu, 23 Dec 2010 20:34:41 +0100 (CET) Received: from passoire.u-picardie.fr (passoire.u-picardie.fr [193.49.184.121]) by mailx.u-picardie.fr (Postfix) with ESMTP id CE15558124; Thu, 23 Dec 2010 20:34:41 +0100 (CET) X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Scanned: Debian amavisd-new at u-picardie.fr Received: from mailx.u-picardie.fr ([193.49.184.8]) by passoire.u-picardie.fr (passoire.u-picardie.fr [193.49.184.121]) (amavisd-new, port 10024) with LMTP id mzwm7Ks0Pw9U; Thu, 23 Dec 2010 20:34:41 +0100 (CET) Received: from ezri.u-picardie.fr (ezri.u-picardie.fr [193.49.184.104]) by mailx.u-picardie.fr (Postfix) with ESMTP id 81F6B58123; Thu, 23 Dec 2010 20:34:41 +0100 (CET) Received: by ezri.u-picardie.fr (Postfix, from userid 1000) id 7C415606CA3; Thu, 23 Dec 2010 20:34:41 +0100 (CET) From: laurent+xfs@u-picardie.fr To: Emmanuel Florac Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: able to mount a fs, unable to repair it Subject: Re: able to mount a fs, unable to repair it References: <87r5d9uuez.fsf@ezri.u-picardie.fr> <20101223183531.19464601@galadriel.home> Date: Thu, 23 Dec 2010 20:34:41 +0100 In-Reply-To: <20101223183531.19464601@galadriel.home> (Emmanuel Florac's message of "Thu, 23 Dec 2010 18:35:31 +0100") Message-ID: <87zkrws2pa.fsf@ezri.u-picardie.fr> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/23.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: mx1.u-picardie.fr[193.49.184.7] X-Barracuda-Start-Time: 1293132882 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=NO_REAL_NAME X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50290 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 NO_REAL_NAME From: does not include a real name X-Virus-Status: Clean Emmanuel Florac writes: Bonsoir Emmanuel, > Le Thu, 23 Dec 2010 02:53:08 +0100 vous =E9criviez: > >> For a reason all my xfs FS got corrupted at the same time. >> My setup is: xen host using lvm on top of soft raid6 on top of jbod >> 3ware connected sata disks. >> Both the host and the VM fs got corrupted. > > RAID-6 is extremely stable on the 3Ware, while software RAID-6 is > dubbed experimental in the kernel. Software RAID can provide seducely > high performance when running benchmarks, but IMO it doesn't fly when > you need your CPU to do some other jobs, like running NFS daemons or > even worse, VMs. Under high CPU loads concurrently coming from the > software RAID and virtualisation stack, so many things may go > wrong... I can't agree more, I'm using both nfs AND VMs :) It is very slow and very cpu consuming. I'm moving away from xen to lxc on this home server, pretty sure it will help. > My advice : software RAID stinks under high CPU load/ high IO. Use > hardware RAID whenever possible because it provides more predictable > performance and remove many weird software interactions from the > picture. The 3w9550sx doesn't raid6, but I admit I've been thinking of using its raid5 instead of the slow soft raid6. Thanks for your advices :) --=20 Laurent From stan@hardwarefreak.com Thu Dec 23 13:52:17 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNJqGCm235906 for ; Thu, 23 Dec 2010 13:52:17 -0600 X-ASG-Debug-ID: 1293134054-425e02c50000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 1CD48147DFF4 for ; Thu, 23 Dec 2010 11:54:14 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id bv5Je8ZSyxlag2UX for ; Thu, 23 Dec 2010 11:54:14 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 491C26C0B8 for ; Thu, 23 Dec 2010 13:54:14 -0600 (CST) Message-ID: <4D13A8E6.7090606@hardwarefreak.com> Date: Thu, 23 Dec 2010 13:54:14 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> <20101223195544.53d45f0b@galadriel.home> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1293134055 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0208 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.42 X-Barracuda-Spam-Status: No, SCORE=-1.42 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50291 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Justin Piszcz put forth on 12/23/2010 1:07 PM: > Main wonder I have is why when the partition is aligned to 1MiB, which is > the default in parted 2.2+ I believe, is it slower than with no partitions? Best guess? Those 3TB Hitachi drives use 512 byte translated native 4KB sectors. The 9750-24 ie card doesn't know how to properly align partitions on such drives, and/or you're using something other than fdisk or parted to create your partitions. Currently these are the only two partitioners that can align partitions properly on 512 byte translated/native 4KB sector drives. Thus you're taking a performance hit, same as with the WD "Advanced Format" drives which have 512 byte translated/native 4KB sectors. If you want maximum performance with least configuration headaches, avoid 512B/4KB sector hybrid drives. If you _need_ maximum drive capacity, live with the warts, or jump through hoops to get the partitions aligned, or, live without partitions if you can. -- Stan From stan@hardwarefreak.com Thu Dec 23 13:56:21 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNJuLfw236704 for ; Thu, 23 Dec 2010 13:56:21 -0600 X-ASG-Debug-ID: 1293134299-42e001150000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3D15C1CF54DC for ; Thu, 23 Dec 2010 11:58:19 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id BFaBViFgJrC5ysQG for ; Thu, 23 Dec 2010 11:58:19 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 906C36C0B8 for ; Thu, 23 Dec 2010 13:58:19 -0600 (CST) Message-ID: <4D13A9DB.1010700@hardwarefreak.com> Date: Thu, 23 Dec 2010 13:58:19 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> <20101223195544.53d45f0b@galadriel.home> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1293134300 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0002 1.0000 -2.0200 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.42 X-Barracuda-Spam-Status: No, SCORE=-1.42 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50292 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Justin Piszcz put forth on 12/23/2010 1:29 PM: > Using a partition shows a slight degredation in the re-write speed but > an increase in performance for sequential output and input with the mode > set to perform. Looks like this is what I will be using as it is the > fastest > speeds overall except for the rewrite. As Dave mentioned earlier, performance may degrade significantly over time as the FS grows and ages, compared to running benchies against an empty filesystem today, especially if your mkfs.xfs parms were off the mark when creating. -- Stan From sandeen@sandeen.net Thu Dec 23 15:10:58 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNLAwLA250142 for ; Thu, 23 Dec 2010 15:10:58 -0600 X-ASG-Debug-ID: 1293138776-0b5800ce0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 453381CF5AA7 for ; Thu, 23 Dec 2010 13:12:56 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id 2rMHkOA0kQuli0WE for ; Thu, 23 Dec 2010 13:12:56 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id ED15D48406EC; Thu, 23 Dec 2010 15:12:55 -0600 (CST) Message-ID: <4D13BB57.80309@sandeen.net> Date: Thu, 23 Dec 2010 15:12:55 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: Justin Piszcz CC: Dave Chinner , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1293138777 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50296 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/23/10 12:06 PM, Justin Piszcz wrote: > > On Thu, 23 Dec 2010, Justin Piszcz wrote: > > > Hi, > > How come parted using (optimal at 1mb alignment is slower than no > partition? because parted got it wrong, sounds like. > In addition, sunit and swidth set properly as mentioned > earlier appears to be _slower_ than defaults with no partitions. stripe unit over an incorrectly aligned partition won't help and I suppose could make it worse. align your partitions, using sector units, to a stripe width unit. Set the stripe width properly on the fs on top of that. -Eric > > http://home.comcast.net/~jpiszcz/20101223/final.html > > Justin. > From petre.rodan@simplex.ro Thu Dec 23 15:16:32 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNLGVZI250834 for ; Thu, 23 Dec 2010 15:16:32 -0600 X-ASG-Debug-ID: 1293139109-0970025e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from passage.avira.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 56A6E147E9AF for ; Thu, 23 Dec 2010 13:18:29 -0800 (PST) Received: from passage.avira.com (passage.avira.com [89.238.222.20]) by cuda.sgi.com with ESMTP id R6YjUHWHRaC0jQ05 for ; Thu, 23 Dec 2010 13:18:29 -0800 (PST) Received: by passage.avira.com (Postfix/AVIRA, from userid 26) id 97A7F1249FA; Thu, 23 Dec 2010 23:18:28 +0200 (EET) Received: from localhost (localhost [127.0.0.1]) by passage.avira.com (Postfix/AVIRA) with ESMTP id 2740C1249F9 for ; Thu, 23 Dec 2010 23:18:28 +0200 (EET) Received: from passage.avira.com (localhost [127.0.0.1]) by localhost (AvMailGate-2.1.3-2) id 11214-A3JL1L; Thu, 23 Dec 2010 23:18:28 +0200 (EET) Received: from naliboat.bu.avira.com (dasapass.avira.com [89.238.222.18]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail.bu.avira.com", Issuer "Avira Intermediate Certificate Authority 2010-2020" (not verified)) by passage.avira.com (Postfix/AVIRA) with ESMTPS id 18B1B1249F9 for ; Thu, 23 Dec 2010 23:18:28 +0200 (EET) Received: (qmail 15431 invoked from network); 23 Dec 2010 21:18:27 -0000 Received: from unknown (HELO peter.simplex.ro) (prodan@10.7.0.16) by naliboat.bu.avira.com with ESMTPA; 23 Dec 2010 21:18:27 -0000 Date: Thu, 23 Dec 2010 23:16:50 +0200 From: Petre Rodan To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down Message-ID: <20101223211650.GA19694@peter.simplex.ro> References: <20101223165532.GA23813@peter.simplex.ro> <4D13A30A.3090600@hardwarefreak.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4D13A30A.3090600@hardwarefreak.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-AntiVirus: checked by AntiVir MailGate (version: 2.1.3-2; AVE: 7.9.4.128; VDF: 7.11.0.153; host: passage.avira.com) X-Barracuda-Connect: passage.avira.com[89.238.222.20] X-Barracuda-Start-Time: 1293139110 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0432 1.0000 -1.7429 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.74 X-Barracuda-Spam-Status: No, SCORE=-1.74 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50297 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hello, On Thu, Dec 23, 2010 at 01:29:14PM -0600, Stan Hoeppner wrote: > Petre Rodan put forth on 12/23/2010 10:55 AM: > > > this hard drive has exceeded it's 300k load/unload maximum from the specs in only 140 days, which means it was woken up every 30s or so. not willingly. > > Contact WD and request a warranty replacement for the drive due to > exceeding the spec'd cycle max in less than 6 months. They may not > honor your request. Whether they do or not, I'd replace the drive as > the mechanism obviously has too much wear on it already, and within one > year of use will have well over double the spec'd cycles. If you > replace it with another 20EARS, replace the firmware immediately as > mentioned below to decrease the load/unload rate. (It would be nice if > they offered the ability to disable the sleep mode totally, but then it > wouldn't be "green" pfft). thanks for your input. I did run wdidle3 on that drive two days ago stopping the nonsense. but my original mail had a different target really. I have to recognize that I don't know much about the inner-workings of a filesystem, but I find it odd that once there is no input from the outside, a process keeps writing to the drive indefinitely. in my very narrow thinking the fact that these writes dissapear after a remount would prove their redundance. to wrap it up, I see no logic to the above and this is why I ask the list to tell me if this is a. something that can easily be fixed via an option I failed to find b. a critical part of xfs's internals that cannot be 'disabled' (with a short explanation) c. simply a bug with the little side-story with the WD 20EARS i was just portraying where this default behaviour can get to. I don't usually read marketing material, but WD acknowledges that their green drives are wrecked in Linux and they simply encourage customers to change their OS. I just have to ask why have we got to get to this point. the drive I was trying to get into standby in the first half of my mail is a different one, an enterprise ST31000340NS placed on an otherwise low power ProLiant MicroServer. Having 8W*12h*30 = 2880 Wh less to pay per hdd per month would be easily achievable if the standby mode would be reached when possible. cheers, peter From eflorac@intellique.com Thu Dec 23 15:43:02 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNLh16j255800 for ; Thu, 23 Dec 2010 15:43:02 -0600 X-ASG-Debug-ID: 1293140697-44c800120000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp3-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E12AC147E73F for ; Thu, 23 Dec 2010 13:44:58 -0800 (PST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id RxnWSPTniNGpidmG for ; Thu, 23 Dec 2010 13:44:58 -0800 (PST) Received: from galadriel.home (unknown [82.235.234.79]) by smtp3-g21.free.fr (Postfix) with ESMTP id 1F0B2A6277; Thu, 23 Dec 2010 22:44:52 +0100 (CET) Date: Thu, 23 Dec 2010 22:44:45 +0100 From: Emmanuel Florac To: laurent+xfs@u-picardie.fr Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: able to mount a fs, unable to repair it Subject: Re: able to mount a fs, unable to repair it Message-ID: <20101223224445.12ce6dde@galadriel.home> In-Reply-To: <87zkrws2pa.fsf@ezri.u-picardie.fr> References: <87r5d9uuez.fsf@ezri.u-picardie.fr> <20101223183531.19464601@galadriel.home> <87zkrws2pa.fsf@ezri.u-picardie.fr> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp3-g21.free.fr[212.27.42.3] X-Barracuda-Start-Time: 1293140700 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50299 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Thu, 23 Dec 2010 20:34:41 +0100 vous =E9criviez: > > My advice : software RAID stinks under high CPU load/ high IO. Use > > hardware RAID whenever possible because it provides more predictable > > performance and remove many weird software interactions from the > > picture. =20 >=20 > The 3w9550sx doesn't raid6, but I admit I've been thinking of using > its raid5 instead of the slow soft raid6. Ah that's a valid reason :) RAID-5 is reasonable with disks under 1TB and arrays up to 6 TB. Further it's a bet against the law of physics :) However, a reliable RAID-5 is probably safer than an experimental RAID-6 overall :) --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From eflorac@intellique.com Thu Dec 23 15:46:41 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNLkfxU256535 for ; Thu, 23 Dec 2010 15:46:41 -0600 X-ASG-Debug-ID: 1293140917-19ee03970000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp3-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A28A621CB8D for ; Thu, 23 Dec 2010 13:48:38 -0800 (PST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id gi33l2AmBxyETspj for ; Thu, 23 Dec 2010 13:48:38 -0800 (PST) Received: from galadriel.home (unknown [82.235.234.79]) by smtp3-g21.free.fr (Postfix) with ESMTP id ACE4FA6243; Thu, 23 Dec 2010 22:48:33 +0100 (CET) Date: Thu, 23 Dec 2010 22:48:32 +0100 From: Emmanuel Florac To: Stan Hoeppner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? Message-ID: <20101223224832.1abb3cb8@galadriel.home> In-Reply-To: <4D13A8E6.7090606@hardwarefreak.com> References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> <20101223195544.53d45f0b@galadriel.home> <4D13A8E6.7090606@hardwarefreak.com> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp3-g21.free.fr[212.27.42.3] X-Barracuda-Start-Time: 1293140920 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50298 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Thu, 23 Dec 2010 13:54:14 -0600 vous =E9criviez: > Best guess? Those 3TB Hitachi drives use 512 byte translated native > 4KB sectors.=20 Yes, I'm sure that no new drive model comes with true 512B sectors anymore... --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From eflorac@intellique.com Thu Dec 23 15:48:52 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNLmpNN256658 for ; Thu, 23 Dec 2010 15:48:52 -0600 X-ASG-Debug-ID: 1293141045-0b2b02320000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp3-g21.free.fr (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 266521CF5786 for ; Thu, 23 Dec 2010 13:50:49 -0800 (PST) Received: from smtp3-g21.free.fr (smtp3-g21.free.fr [212.27.42.3]) by cuda.sgi.com with ESMTP id 4TU2lLzM1VNvmaRp for ; Thu, 23 Dec 2010 13:50:49 -0800 (PST) Received: from galadriel.home (unknown [82.235.234.79]) by smtp3-g21.free.fr (Postfix) with ESMTP id E05AAA624F; Thu, 23 Dec 2010 22:50:41 +0100 (CET) Date: Thu, 23 Dec 2010 22:50:36 +0100 From: Emmanuel Florac To: Justin Piszcz Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? Message-ID: <20101223225036.4bef756e@galadriel.home> In-Reply-To: References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> <20101223195544.53d45f0b@galadriel.home> Organization: Intellique X-Mailer: Claws Mail 3.7.3 (GTK+ 2.20.1; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-Barracuda-Connect: smtp3-g21.free.fr[212.27.42.3] X-Barracuda-Start-Time: 1293141051 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50300 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Le Thu, 23 Dec 2010 14:07:13 -0500 (EST) vous =E9criviez: > Main wonder I have is why when the partition is aligned to 1MiB, > which is the default in parted 2.2+ I believe, is it slower than with > no partitions? 1MiB possibly can't round well on the stripe boundaries. I suppose you could get better results with 64KB or 16KB stripes. Did you try with an LVM in between? --=20 ------------------------------------------------------------------------ Emmanuel Florac | Direction technique | Intellique | | +33 1 78 94 84 02 ------------------------------------------------------------------------ From jpiszcz@lucidpixels.com Thu Dec 23 16:03:00 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNM30eL257686 for ; Thu, 23 Dec 2010 16:03:00 -0600 X-ASG-Debug-ID: 1293141898-3d1e00e70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from lucidpixels.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 604E41CF583D for ; Thu, 23 Dec 2010 14:04:58 -0800 (PST) Received: from lucidpixels.com (lucidpixels.com [75.144.35.66]) by cuda.sgi.com with ESMTP id W43wuv7HoZeFIvC7 for ; Thu, 23 Dec 2010 14:04:58 -0800 (PST) Received: by lucidpixels.com (Postfix, from userid 1001) id 7E3EC12055A; Thu, 23 Dec 2010 17:04:58 -0500 (EST) Date: Thu, 23 Dec 2010 17:04:58 -0500 (EST) From: Justin Piszcz To: Emmanuel Florac cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? In-Reply-To: <20101223225036.4bef756e@galadriel.home> Message-ID: References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> <20101223195544.53d45f0b@galadriel.home> <20101223225036.4bef756e@galadriel.home> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: MULTIPART/MIXED; BOUNDARY="655872-1092608683-1293141898=:17269" X-Barracuda-Connect: lucidpixels.com[75.144.35.66] X-Barracuda-Start-Time: 1293141899 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50300 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --655872-1092608683-1293141898=:17269 Content-Type: TEXT/PLAIN; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: QUOTED-PRINTABLE Hi, I had not tested with 64KB or 16KB stripes: I used optimal (default I believe) in newer 2.2+ parted: -a alignment-type, --align alignment-type Set alignment for newly created partitions, valid align= ment types are: none Use the minimum alignment allowed by the disk type. cylinder Align partitions to cylinders. minimal Use minimum alignment as given by the disk topo= logy information. This and the opt value will use la= yout information provided by the disk to align the log= ical partition table addresses to actual physical block= s on the disks. The min value is the minimum aligment ne= eded to align the partition properly to physical blocks, w= hich avoids performance degradation. optimal Use optimum alignment as given by the disk topo= logy information. This aligns to a multiple of the phys= ical block size in a way that guarantees optimal performan= ce. I'm happy with the performance now.. I get 16GB ram tomorrow so hopefully= =20 that'll be enough if I need to xfs_repair. Justin. On Thu, 23 Dec 2010, Emmanuel Florac wrote: > Le Thu, 23 Dec 2010 14:07:13 -0500 (EST) vous =E9criviez: > >> Main wonder I have is why when the partition is aligned to 1MiB, >> which is the default in parted 2.2+ I believe, is it slower than with >> no partitions? > > 1MiB possibly can't round well on the stripe boundaries. I suppose you > could get better results with 64KB or 16KB stripes. Did you try with an > LVM in between? > > --=20 > ------------------------------------------------------------------------ > Emmanuel Florac | Direction technique > | Intellique > |=09 > | +33 1 78 94 84 02 > ------------------------------------------------------------------------ > --655872-1092608683-1293141898=:17269-- From stan@hardwarefreak.com Thu Dec 23 17:19:07 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNNJ7Nb010291 for ; Thu, 23 Dec 2010 17:19:07 -0600 X-ASG-Debug-ID: 1293146466-6ca001f70000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id CA5D321CB9A for ; Thu, 23 Dec 2010 15:21:06 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id NCy022x1DondhYeH for ; Thu, 23 Dec 2010 15:21:06 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 25F496C14F for ; Thu, 23 Dec 2010 17:21:06 -0600 (CST) Message-ID: <4D13D962.5060809@hardwarefreak.com> Date: Thu, 23 Dec 2010 17:21:06 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> <20101223195544.53d45f0b@galadriel.home> <4D13A8E6.7090606@hardwarefreak.com> <20101223224832.1abb3cb8@galadriel.home> In-Reply-To: <20101223224832.1abb3cb8@galadriel.home> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1293146466 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0698 1.0000 -1.5765 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.98 X-Barracuda-Spam-Status: No, SCORE=-0.98 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50306 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Emmanuel Florac put forth on 12/23/2010 3:48 PM: > Le Thu, 23 Dec 2010 13:54:14 -0600 vous écriviez: > >> Best guess? Those 3TB Hitachi drives use 512 byte translated native >> 4KB sectors. > > Yes, I'm sure that no new drive model comes with true 512B sectors > anymore... I believe most/all shipping drives of 1TB and smaller still have native 512 byte sectors, dependent on specific vendor/model line of course. It's mainly the 1.5TB and up drives with the hybrid 512/4096 byte sector abomination. It would be far more optimal if they'd just ship native 4K sector drives wouldn't it? Isn't most of Linux already patched for pure 4k sector drives? Is XFS ready for such native 4k sector drives? Are the various RAID cards/SAN array controllers? -- Stan From r.scobie@clear.net.nz Thu Dec 23 17:46:39 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBNNkc33015437 for ; Thu, 23 Dec 2010 17:46:39 -0600 X-ASG-Debug-ID: 1293148116-59d6030f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from smtp3.clear.net.nz (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0488E147EB4F for ; Thu, 23 Dec 2010 15:48:36 -0800 (PST) Received: from smtp3.clear.net.nz (smtp3.clear.net.nz [203.97.33.64]) by cuda.sgi.com with ESMTP id bH6F0ySMlUOIrtTe for ; Thu, 23 Dec 2010 15:48:36 -0800 (PST) Received: from [210.246.8.113] (210-246-8-113.paradise.net.nz [210.246.8.113]) by smtp3.clear.net.nz (CLEAR Net Mail) with ESMTP id <0LDW00F8ZNGZW900@smtp3.clear.net.nz> for xfs@oss.sgi.com; Fri, 24 Dec 2010 12:48:36 +1300 (NZDT) Date: Fri, 24 Dec 2010 12:47:42 +1300 From: Richard Scobie X-ASG-Orig-Subj: Re: able to mount a fs, unable to repair it Subject: Re: able to mount a fs, unable to repair it To: xfs@oss.sgi.com Message-id: <4D13DF9E.4090507@clear.net.nz> MIME-version: 1.0 Content-type: text/plain; charset=us-ascii; format=flowed Content-transfer-encoding: 7bit User-Agent: Mozilla/5.0 (X11; U; Linux i686 (x86_64); en-US; rv:1.8.1.13) Gecko/20080313 SeaMonkey/1.1.9 X-Barracuda-Connect: smtp3.clear.net.nz[203.97.33.64] X-Barracuda-Start-Time: 1293148118 X-Barracuda-Bayes: INNOCENT GLOBAL 0.2393 1.0000 -0.6275 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.63 X-Barracuda-Spam-Status: No, SCORE=-0.63 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50307 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Emmanuel Florac wrote: > However, a reliable RAID-5 is probably safer than an experimental > RAID-6 overall. Looking at the 2.6.29.1 kernel running on this machine, the only md RAID mode marked as experimental is RAID-10. I have no experience using Xen, but have used md RAID6 extensively in heavily loaded situations for over three years without problems. Regards, Richard From stan@hardwarefreak.com Thu Dec 23 18:52:21 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBO0qLI1028076 for ; Thu, 23 Dec 2010 18:52:21 -0600 X-ASG-Debug-ID: 1293152059-669b00800000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C690521B477 for ; Thu, 23 Dec 2010 16:54:19 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id Hpuyi3M62X31lMxb for ; Thu, 23 Dec 2010 16:54:19 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 456F56C14F for ; Thu, 23 Dec 2010 18:54:19 -0600 (CST) Message-ID: <4D13EF3B.2050401@hardwarefreak.com> Date: Thu, 23 Dec 2010 18:54:19 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down References: <20101223165532.GA23813@peter.simplex.ro> <4D13A30A.3090600@hardwarefreak.com> <20101223211650.GA19694@peter.simplex.ro> In-Reply-To: <20101223211650.GA19694@peter.simplex.ro> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1293152059 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0226 1.0000 -1.8743 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.27 X-Barracuda-Spam-Status: No, SCORE=-1.27 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50312 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Petre Rodan put forth on 12/23/2010 3:16 PM: > but my original mail had a different target really. I have to recognize that I don't know much about the inner-workings of a filesystem, but I find it odd that once there is no input from the outside, a process keeps writing to the drive indefinitely. in my very narrow thinking the fact that these writes dissapear after a remount would prove their redundance. Ahh, quite right. Sorry Petre. This might shed some light on your issue. Old background thread: http://oss.sgi.com/archives/xfs/2003-09/msg00674.html Current documentation on this turnable knob: http://www.mjmwired.net/kernel/Documentation/filesystems/xfs.txt fs.xfs.xfssyncd_centisecs (Min: 100 Default: 3000 Max: 720000) The interval at which the xfssyncd thread flushes metadata out to disk. This thread will flush log activity out, and do some processing on unlinked inodes. Maybe related or also worth mentioning: fs.xfs.age_buffer_centisecs (Min: 100 Default: 1500 Max: 720000) The age at which xfsbufd flushes dirty metadata buffers to disk. As of 2.6.36, it looks like you can stretch this out to a more reasonable (for your application) 12 minutes if you like. I'm not sure if the max value is different than 2.6.32.2 as I don't have a box or VM available with 2.6.32.2. Try bumping these values to 720000 and see if that allows your disk to sleep for 12 mins. -- Stan From stan@hardwarefreak.com Thu Dec 23 18:59:20 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBO0xJjI029432 for ; Thu, 23 Dec 2010 18:59:20 -0600 X-ASG-Debug-ID: 1293152478-2535026d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 130D1147EEEF for ; Thu, 23 Dec 2010 17:01:18 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id Mcq9riURJ3wKeiBu for ; Thu, 23 Dec 2010 17:01:18 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 2395B6C14F for ; Thu, 23 Dec 2010 19:01:18 -0600 (CST) Message-ID: <4D13F0DE.50306@hardwarefreak.com> Date: Thu, 23 Dec 2010 19:01:18 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: Anyone using XFS in production on > 20TiB volumes? Subject: Re: Anyone using XFS in production on > 20TiB volumes? References: <20101222175611.1c7d5190@harpe.intellique.com> <4D124B71.9030401@sandeen.net> <20101223012655.2681c596@galadriel.home> <20101223005630.GJ4907@dastard> <20101223195544.53d45f0b@galadriel.home> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1293152479 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0859 1.0000 -1.4777 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.88 X-Barracuda-Spam-Status: No, SCORE=-0.88 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50311 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Justin Piszcz put forth on 12/23/2010 1:29 PM: > Please check the updated page: > http://home.comcast.net/~jpiszcz/20101223/final.html > > Using a partition shows a slight degredation in the re-write speed but > an increase in performance for sequential output and input with the mode > set to perform. Looks like this is what I will be using as it is the > fastest > speeds overall except for the rewrite. If your primary workloads for this array are mostly single user/thread streaming writes/reads then this may be fine. If they are multi-user or multi-threaded random re-write server loads, re-write is the most important metric and you should optimize for that scenario alone, as its performance is most dramatically impacted by parity RAID schemes such as RAID 6. -- Stan From stan@hardwarefreak.com Thu Dec 23 23:13:13 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBO5DCpm066373 for ; Thu, 23 Dec 2010 23:13:13 -0600 X-ASG-Debug-ID: 1293167710-469303bd0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 7D2B61A32E30 for ; Thu, 23 Dec 2010 21:15:10 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id zoO9lZQiVgBTpYSs for ; Thu, 23 Dec 2010 21:15:10 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 86D8A6C14F for ; Thu, 23 Dec 2010 23:15:10 -0600 (CST) Message-ID: <4D142C5E.2020004@hardwarefreak.com> Date: Thu, 23 Dec 2010 23:15:10 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down References: <20101223165532.GA23813@peter.simplex.ro> <4D13A30A.3090600@hardwarefreak.com> <20101223211650.GA19694@peter.simplex.ro> <4D13EF3B.2050401@hardwarefreak.com> In-Reply-To: <4D13EF3B.2050401@hardwarefreak.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1293167711 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.42 X-Barracuda-Spam-Status: No, SCORE=-1.42 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50328 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Stan Hoeppner put forth on 12/23/2010 6:54 PM: > http://www.mjmwired.net/kernel/Documentation/filesystems/xfs.txt > > fs.xfs.xfssyncd_centisecs (Min: 100 Default: 3000 Max: 720000) > The interval at which the xfssyncd thread flushes metadata > out to disk. This thread will flush log activity out, and > do some processing on unlinked inodes. > > Maybe related or also worth mentioning: > > fs.xfs.age_buffer_centisecs (Min: 100 Default: 1500 Max: 720000) > The age at which xfsbufd flushes dirty metadata buffers to disk. These can be found in /proc/sys/fs/xfs and you'd simply ~$ echo 720000 > /proc/sys/fs/xfs/xfssyncd_centisecs to get the maximum 12 minute interval. -- Stan From petre.rodan@simplex.ro Fri Dec 24 00:02:28 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBO62SVU075305 for ; Fri, 24 Dec 2010 00:02:28 -0600 X-ASG-Debug-ID: 1293170665-100f00b10000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from passage.avira.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 778DD147F28B for ; Thu, 23 Dec 2010 22:04:26 -0800 (PST) Received: from passage.avira.com (passage.avira.com [89.238.222.20]) by cuda.sgi.com with ESMTP id ZTaoxvujhQ1F73Em for ; Thu, 23 Dec 2010 22:04:26 -0800 (PST) Received: by passage.avira.com (Postfix/AVIRA, from userid 26) id A7D81124A06; Fri, 24 Dec 2010 08:04:24 +0200 (EET) Received: from localhost (localhost [127.0.0.1]) by passage.avira.com (Postfix/AVIRA) with ESMTP id 45964124A05 for ; Fri, 24 Dec 2010 08:04:24 +0200 (EET) Received: from passage.avira.com (localhost [127.0.0.1]) by localhost (AvMailGate-2.1.3-2) id 2006-EcrAQy; Fri, 24 Dec 2010 08:04:24 +0200 (EET) Received: from naliboat.bu.avira.com (dasapass.avira.com [89.238.222.18]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail.bu.avira.com", Issuer "Avira Intermediate Certificate Authority 2010-2020" (not verified)) by passage.avira.com (Postfix/AVIRA) with ESMTPS id 3673B124A05 for ; Fri, 24 Dec 2010 08:04:24 +0200 (EET) Received: (qmail 6279 invoked from network); 24 Dec 2010 06:04:24 -0000 Received: from unknown (HELO peter.simplex.ro) (prodan@10.7.0.16) by naliboat.bu.avira.com with ESMTPA; 24 Dec 2010 06:04:24 -0000 Date: Fri, 24 Dec 2010 08:02:46 +0200 From: Petre Rodan To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down Message-ID: <20101224060246.GA2308@peter.simplex.ro> References: <20101223165532.GA23813@peter.simplex.ro> <4D13A30A.3090600@hardwarefreak.com> <20101223211650.GA19694@peter.simplex.ro> <4D13EF3B.2050401@hardwarefreak.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4D13EF3B.2050401@hardwarefreak.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-AntiVirus: checked by AntiVir MailGate (version: 2.1.3-2; AVE: 7.9.4.128; VDF: 7.11.0.153; host: passage.avira.com) X-Barracuda-Connect: passage.avira.com[89.238.222.20] X-Barracuda-Start-Time: 1293170667 X-Barracuda-Bayes: INNOCENT GLOBAL 0.1485 1.0000 -1.1100 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.11 X-Barracuda-Spam-Status: No, SCORE=-1.11 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50331 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hello Stan, On Thu, Dec 23, 2010 at 06:54:19PM -0600, Stan Hoeppner wrote: > Petre Rodan put forth on 12/23/2010 3:16 PM: > > > but my original mail had a different target really. I have to recognize that I don't know much about the inner-workings of a filesystem, but I find it odd that once there is no input from the outside, a process keeps writing to the drive indefinitely. in my very narrow thinking the fact that these writes dissapear after a remount would prove their redundance. > > Ahh, quite right. Sorry Petre. This might shed some light on your > issue. Old background thread: > > http://oss.sgi.com/archives/xfs/2003-09/msg00674.html > > Current documentation on this turnable knob: > > http://www.mjmwired.net/kernel/Documentation/filesystems/xfs.txt I appreciate your quick replies, but rest assured that I did search the archives and the documentation that came with the kernel. I would be delighted to know the underlying reason why internal xfs processes need to flush things to the drive more than once. can't it be as easy as accept write command -> cache -> actual write to the hardware -> clean cache/log/dirty metadata -> sleep until next command comes (and not touch the drive in any way until then) what am I missing in this picture? if anything needs to be flushed, why do it over and over again, once is not enough ? what I found (see first mail from thread) is that a write to an xfs partition triggers an xfssyncd process to continually write to the drive for no apparent reason. and keeps writing at regulated intervals long after any other read or write request has been made from the outside. I left the drive untouched for 12 hours and xfssyncd was still pinging the drive. and there is no xfssyncd process pinging if I do not do initiate a write to the disk after the partition is mounted, so to me that means that xfs would function without constant writing to the underlying device. > fs.xfs.xfssyncd_centisecs (Min: 100 Default: 3000 Max: 720000) > fs.xfs.age_buffer_centisecs (Min: 100 Default: 1500 Max: 720000) just increasing the delay until an inevitable and seemingly redundant disk write is not what I want. I was searching for an option to make internal xfs processes not touch the drive after the buffers/log/dirty metadata have been flushed (once). thanks, peter From sandeen@sandeen.net Fri Dec 24 12:15:56 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_26, J_CHICKENPOX_43 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBOIFu49141805 for ; Fri, 24 Dec 2010 12:15:56 -0600 X-ASG-Debug-ID: 1293214674-69e802d20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id EC36AF76005 for ; Fri, 24 Dec 2010 10:17:55 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id ULrDTNbdZKDaWbK4 for ; Fri, 24 Dec 2010 10:17:55 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id 3EBF34815713; Fri, 24 Dec 2010 12:17:54 -0600 (CST) Message-ID: <4D14E3D2.4000505@sandeen.net> Date: Fri, 24 Dec 2010 12:17:54 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: Petre Rodan CC: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down References: <20101223165532.GA23813@peter.simplex.ro> In-Reply-To: <20101223165532.GA23813@peter.simplex.ro> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1293214675 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.92 X-Barracuda-Spam-Status: No, SCORE=-1.92 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50379 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/23/10 10:55 AM, Petre Rodan wrote: > > Hello, > > I have a problem with a hard drive that never managed to spin down. > this drive is a storage space, not a system disk, the only thing that > generated writes is the nfs server that exports its contents. it has > only one large xfs partition on it. > > upon closer inspection it turns out that after the first Write action > to that partition, an xfssyncd process continues to write to that > partition each 36 seconds and it doesn't stop doing that, even if > there are no more Writes from the exterior. this keeps the drive busy > with varying consequences. more about that later. Doesn't seem like that should happen. > I found that the only easy way to stop the xfssyncd process poking > the drive is to run a `mount -o remount /mnt/space`. this will > silence any internal xfs process to acessing the drive, thus allowing > it to spin down and only be woken up by a NFS access. > > here are some simple steps to replicate the problem: > > # echo 3 > /proc/sys/vm/drop_caches # free cached fs entities > # ( blktrace -d /dev/sdb -o - | blkparse -i - ) & > # mount -o remount /mnt/space > # find /mnt/space/ -type f > /dev/null # generate some non-cached Read requests > # # absolutely no writes have been performed to the drive, > # # it could spin down now if enough time would pass > # touch /mnt/space/foo > # # process 1352 will start writing to the drive at a 35-36s interval, > # # even if there has been no other write request. > > 8,16 1 36591 6306.873151576 1352 A WBS 976985862 + 2 <- (8,17) 976985799 > 8,16 1 36592 6306.873152998 1352 Q WBS 976985862 + 2 [xfssyncd/sdb1] > [..] > 8,16 1 36600 6342.875151286 1352 A WBS 976985864 + 2 <- (8,17) 976985801 > 8,16 1 36601 6342.875152938 1352 Q WBS 976985864 + 2 [xfssyncd/sdb1] > [..] > 8,16 1 36609 6378.877225211 1352 A WBS 976985866 + 2 <- (8,17) 976985803 > 8,16 1 36610 6378.877226935 1352 Q WBS 976985866 + 2 [xfssyncd/sdb1] > > there was no file at or near the 976985799 inode (I presume that's an > inode?) Nope that's a sector on the drive. > A WBS 976985862 + 2 <- (8,17) 976985799 976985799 is the sector on sdb1, mapped to 976985862 on sdb (63 sectors in, yay dos partition tables!) A means remapped (from sdb1 to sdb), Q means Queued. WBS means Write/Barrier/Synchronous. Also, you're stepping through, it looks like - 976985799, 976985801, 976985803, .... > I found that the only way to stop it is to remount the partition. I > also tried sync(1), but to no avail. > > so is there an XFS option somewhere that would make the filesystem be > more forgiving with the hardware beneath it? without loosing the > journal of course. I think we just need to figure out what's causing the writes, and what's being written. > I'm using a vanilla 2.6.36.2 kernel patched with grsecurity, default > mkfs.xfs options, rw,nosuid,nodev,noexec,noatime,attr2,noquota mount > options, and xfs_info looks like this:> > meta-data=/dev/sdb1 isize=256 agcount=4, agsize=61047500 blks > = sectsz=512 attr=2 > data = bsize=4096 blocks=244190000, imaxpct=25 > = sunit=0 swidth=0 blks > naming =version 2 bsize=4096 ascii-ci=0 > log =internal bsize=4096 blocks=32768, version=2 > = sectsz=512 sunit=0 blks, lazy-count=0 > realtime =none extsz=4096 blocks=0, rtextents=0 so what is sector 976985799 on the filesystem... An AG is 61047500 blocks long, or 488380000 sectors long. There are 4 of them, and the log is at the front of an AG in the middle of the fs. So the 1st AG starts at 0, 2nd at 488380000 sectors, 3rd at 976760000 sectors. Your writes are at 976985799-ish sectors, or 225799 sectors into the 3rd AG. The log is 262144 sectors long. So this looks like log writes. Makes sense with the WBS data too. xfssyncd forces the log, reclaims inodes, and logs a dummy transaction if needed. On an idle fs though I wouldn't expect that we need any of this, so probably need to dig a little to see what's going on. I don't think you need a mount option, I think we need an explanation and maybe a bugfix. :) I'll try to find time to look into it unless someone else knows what's going on off the top of their heads. -Eric From stan@hardwarefreak.com Fri Dec 24 16:58:13 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBOMwCMu180842 for ; Fri, 24 Dec 2010 16:58:13 -0600 X-ASG-Debug-ID: 1293231611-4be402830000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id C19EF21E5B2 for ; Fri, 24 Dec 2010 15:00:12 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id PAF3G0pm3mxArxg2 for ; Fri, 24 Dec 2010 15:00:12 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id B50C26C14F for ; Fri, 24 Dec 2010 17:00:11 -0600 (CST) Message-ID: <4D1525FB.1010605@hardwarefreak.com> Date: Fri, 24 Dec 2010 17:00:11 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down References: <20101223165532.GA23813@peter.simplex.ro> <4D13A30A.3090600@hardwarefreak.com> <20101223211650.GA19694@peter.simplex.ro> <4D13EF3B.2050401@hardwarefreak.com> <20101224060246.GA2308@peter.simplex.ro> In-Reply-To: <20101224060246.GA2308@peter.simplex.ro> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1293231612 X-Barracuda-Bayes: INNOCENT GLOBAL 0.2230 1.0000 -0.7090 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -0.11 X-Barracuda-Spam-Status: No, SCORE=-0.11 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50398 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Petre Rodan put forth on 12/24/2010 12:02 AM: >> fs.xfs.xfssyncd_centisecs (Min: 100 Default: 3000 Max: 720000) >> fs.xfs.age_buffer_centisecs (Min: 100 Default: 1500 Max: 720000) > > just increasing the delay until an inevitable and seemingly redundant disk write is not what I want. > I was searching for an option to make internal xfs processes not touch the drive after the buffers/log/dirty metadata have been flushed (once). I'm not a dev Petre but just another XFS user. This is the best "solution" I could come up with for your issue. I assumed this "unnecessary" regularly scheduled activity was a house cleaning measure and done intentionally; didn't dawn on me that it may be a bug. Sorry I wasn't able to fully address your issue. If/until there is a permanent fix for this you may want to bump this to 720000 anyway as an interim measure, if you haven't already, as it should yield a significantly better situation than what you have now. You'll at least get something like ~1400 minutes of sleep per day instead of none, decreasing your load/unload cycles from ~2880/day to ~120/day, if my math is correct. -- Stan From sandeen@sandeen.net Fri Dec 24 21:34:52 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBP3Yp1u223014 for ; Fri, 24 Dec 2010 21:34:52 -0600 X-ASG-Debug-ID: 1293248210-03b2031c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.sandeen.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 8CE75147EE25 for ; Fri, 24 Dec 2010 19:36:50 -0800 (PST) Received: from mail.sandeen.net (64-131-28-21.usfamily.net [64.131.28.21]) by cuda.sgi.com with ESMTP id Son7AeEReIlD3sXq for ; Fri, 24 Dec 2010 19:36:50 -0800 (PST) Received: from liberator.sandeen.net (liberator.sandeen.net [10.0.0.4]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.sandeen.net (Postfix) with ESMTP id 6E6C64815714; Fri, 24 Dec 2010 21:36:49 -0600 (CST) Message-ID: <4D1566D1.6090506@sandeen.net> Date: Fri, 24 Dec 2010 21:36:49 -0600 From: Eric Sandeen User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.6; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: Stan Hoeppner CC: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down References: <20101223165532.GA23813@peter.simplex.ro> <4D13A30A.3090600@hardwarefreak.com> <20101223211650.GA19694@peter.simplex.ro> <4D13EF3B.2050401@hardwarefreak.com> <20101224060246.GA2308@peter.simplex.ro> <4D1525FB.1010605@hardwarefreak.com> In-Reply-To: <4D1525FB.1010605@hardwarefreak.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: 64-131-28-21.usfamily.net[64.131.28.21] X-Barracuda-Start-Time: 1293248211 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0049 1.0000 -1.9892 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.89 X-Barracuda-Spam-Status: No, SCORE=-1.89 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50417 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On 12/24/10 5:00 PM, Stan Hoeppner wrote: > Petre Rodan put forth on 12/24/2010 12:02 AM: > >>> fs.xfs.xfssyncd_centisecs (Min: 100 Default: 3000 Max: 720000) >>> fs.xfs.age_buffer_centisecs (Min: 100 Default: 1500 Max: 720000) >> >> just increasing the delay until an inevitable and seemingly redundant disk write is not what I want. >> I was searching for an option to make internal xfs processes not touch the drive after the buffers/log/dirty metadata have been flushed (once). > > I'm not a dev Petre but just another XFS user. This is the best > "solution" I could come up with for your issue. I assumed this > "unnecessary" regularly scheduled activity was a house cleaning measure > and done intentionally; didn't dawn on me that it may be a bug. > > Sorry I wasn't able to fully address your issue. If/until there is a > permanent fix for this you may want to bump this to 720000 anyway as an > interim measure, if you haven't already, as it should yield a > significantly better situation than what you have now. You'll at least > get something like ~1400 minutes of sleep per day instead of none, > decreasing your load/unload cycles from ~2880/day to ~120/day, if my > math is correct. Of course, then xfssyncd will not be doing its proper duty regularly ;) We just need to see why it's always finding work to do when idle. -Eric From stan@hardwarefreak.com Fri Dec 24 22:30:45 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBP4Uivj231884 for ; Fri, 24 Dec 2010 22:30:45 -0600 X-ASG-Debug-ID: 1293251564-3d0100c00000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from greer.hardwarefreak.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 31BA421E938 for ; Fri, 24 Dec 2010 20:32:44 -0800 (PST) Received: from greer.hardwarefreak.com (mo-65-41-216-221.sta.embarqhsd.net [65.41.216.221]) by cuda.sgi.com with ESMTP id FvA28SIY8GFUqPAm for ; Fri, 24 Dec 2010 20:32:44 -0800 (PST) Received: from [192.168.100.53] (gffx.hardwarefreak.com [192.168.100.53]) by greer.hardwarefreak.com (Postfix) with ESMTP id 532346C0B2 for ; Fri, 24 Dec 2010 22:32:44 -0600 (CST) Message-ID: <4D1573EC.9070603@hardwarefreak.com> Date: Fri, 24 Dec 2010 22:32:44 -0600 From: Stan Hoeppner User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.9.2.13) Gecko/20101207 Thunderbird/3.1.7 MIME-Version: 1.0 To: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down References: <20101223165532.GA23813@peter.simplex.ro> <4D13A30A.3090600@hardwarefreak.com> <20101223211650.GA19694@peter.simplex.ro> <4D13EF3B.2050401@hardwarefreak.com> <20101224060246.GA2308@peter.simplex.ro> <4D1525FB.1010605@hardwarefreak.com> <4D1566D1.6090506@sandeen.net> In-Reply-To: <4D1566D1.6090506@sandeen.net> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Barracuda-Connect: mo-65-41-216-221.sta.embarqhsd.net[65.41.216.221] X-Barracuda-Start-Time: 1293251565 X-Barracuda-Bayes: INNOCENT GLOBAL 0.2719 1.0000 -0.4723 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: 0.13 X-Barracuda-Spam-Status: No, SCORE=0.13 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC5_MJ1963, RDNS_DYNAMIC X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50420 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.10 RDNS_DYNAMIC Delivered to trusted network by host with dynamic-looking rDNS 0.50 BSF_SC5_MJ1963 Custom Rule MJ1963 X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Eric Sandeen put forth on 12/24/2010 9:36 PM: > On 12/24/10 5:00 PM, Stan Hoeppner wrote: >> Petre Rodan put forth on 12/24/2010 12:02 AM: >> >>>> fs.xfs.xfssyncd_centisecs (Min: 100 Default: 3000 Max: 720000) >>>> fs.xfs.age_buffer_centisecs (Min: 100 Default: 1500 Max: 720000) >>> >>> just increasing the delay until an inevitable and seemingly redundant disk write is not what I want. >>> I was searching for an option to make internal xfs processes not touch the drive after the buffers/log/dirty metadata have been flushed (once). >> >> I'm not a dev Petre but just another XFS user. This is the best >> "solution" I could come up with for your issue. I assumed this >> "unnecessary" regularly scheduled activity was a house cleaning measure >> and done intentionally; didn't dawn on me that it may be a bug. >> >> Sorry I wasn't able to fully address your issue. If/until there is a >> permanent fix for this you may want to bump this to 720000 anyway as an >> interim measure, if you haven't already, as it should yield a >> significantly better situation than what you have now. You'll at least >> get something like ~1400 minutes of sleep per day instead of none, >> decreasing your load/unload cycles from ~2880/day to ~120/day, if my >> math is correct. > > Of course, then xfssyncd will not be doing its proper duty regularly ;) Sure it will. Just not *as regularly*. You, Dave, Alex, Christoph, or someone made the regularity configurable didn't you? ;) > We just need to see why it's always finding work to do when idle. Seems like my grandmother must have been involved with the current code. She was always telling me "Idle hands are the Devil's work." ;) Or, whoever wrote the code was somehow influenced by my grandmother (his own). -- Stan From petre.rodan@simplex.ro Sat Dec 25 06:06:41 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBPC6ech044692 for ; Sat, 25 Dec 2010 06:06:41 -0600 X-ASG-Debug-ID: 1293278916-1720035f0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from dal02.mx.dnspark.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9DCD41CF84CD for ; Sat, 25 Dec 2010 04:08:36 -0800 (PST) Received: from dal02.mx.dnspark.net (dal02.mx.dnspark.net [67.228.184.121]) by cuda.sgi.com with ESMTP id 11jPEeH9DWsKDceH for ; Sat, 25 Dec 2010 04:08:36 -0800 (PST) Received: from pandora.simplex.ro (unknown [188.25.55.5]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by dal02.mx.dnspark.net (Postfix) with ESMTPSA id 56619194312; Sat, 25 Dec 2010 06:08:35 -0600 (CST) Date: Sat, 25 Dec 2010 14:09:48 +0200 From: Petre Rodan To: Eric Sandeen Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down Message-ID: <20101225120948.GA14200@pandora.simplex.ro> References: <20101223165532.GA23813@peter.simplex.ro> <4D14E3D2.4000505@sandeen.net> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="rJwd6BRFiFCcLxzm" Content-Disposition: inline In-Reply-To: <4D14E3D2.4000505@sandeen.net> User-Agent: Mutt/1.5.21 (2010-09-15) X-Barracuda-Connect: dal02.mx.dnspark.net[67.228.184.121] X-Barracuda-Start-Time: 1293278917 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50450 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --rJwd6BRFiFCcLxzm Content-Type: multipart/mixed; boundary="WIyZ46R2i8wDzkSu" Content-Disposition: inline --WIyZ46R2i8wDzkSu Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi Eric, On Fri, Dec 24, 2010 at 12:17:54PM -0600, Eric Sandeen wrote: > Doesn't seem like that should happen. music to my ears :) having this fixed would make me a happy bunny. > > 8,16 1 36591 6306.873151576 1352 A WBS 976985862 + 2 <- (8,17= ) 976985799 > >=20 > > there was no file at or near the 976985799 inode (I presume that's an > > inode?) >=20 > Nope that's a sector on the drive. great, this should make debugging easier. > I think we just need to figure out what's causing the writes, and > what's being written. not sure about the first thing, but do read on for the "what's written" cha= pter: # mount -o remount /dev/sdb1 # to start fresh with no xfssyncd's pok= ing arround # cp -r /usr/src/linux* /mnt/space # do some writes to the drive, then let= it completely unused for at least 30 minutes after the cp finished # at this point the only thing active o= n sdb1 is xfssyncd at 36s intervals # bin/blk_debug.sh > /dev/shm/stdout blk_debug.sh parses the output of blktrace, blkparse and for each line cont= aining 'A WBS' it uses dd to save 8 sectors from sdb starting with the mapp= ed value I get from blkparse blktrace -d /dev/sdb -o - | blkparse -i - | while read line; do echo "${line}" grep -q 'A WBS' <<< ${line} && { sect=3D$(echo "${line}" | awk '{ print $8 }' ) # fork a dd and let xfssyncd time to finish writing (=20 sleep 20 # force dd to read the drive, not a cache echo 3 > /proc/sys/vm/drop_caches dd if=3D/dev/sdb of=3D/dev/shm/dump_${sect} skip=3D${sect} bs= =3D512 count=3D8 && \ echo "* sectors ${sect}-$((${sect}+8)) saved into dump_${sect}" ) & } done I thought that since xfssyncd writes to sectors in increments of 2 it would= be possible to run a diff between 2 consecutive samples and get some infor= mation that may help you see something. I provide an attachment with the en= tire stdout, sector dumps and scripts. also available here: http://incoming= =2Eavira.com/NOSYNC/peter/xfssyncd_debug.tar.bz2 there might be a slight misalignment of a few sectors between dd's seek and= where it's been told to go, look closely at the blkparse. apparently xfssy= ncd is not 'appending' information, it looks more like a bucketload of a si= milarly-looking array of data each time. hope this helps, if there is anything amiss I could fix it and try again an= ytime. > On an idle fs though I wouldn't expect that we need any of this, so proba= bly > need to dig a little to see what's going on. I don't think you need a mo= unt > option, I think we need an explanation and maybe a bugfix. :) >=20 > I'll try to find time to look into it unless someone else knows what's go= ing > on off the top of their heads. thank you for your interest. I'll be glad to test kernel patches against 2.6.36.2 that you might come up= with. @Stan, thanks for your input, it's nice to see friendly communities gathere= d arround a mailing list again. Happy Holidays everyone. cheers, peter --=20 petre rodan Technical Manager Simplex SRL, Bucharest --WIyZ46R2i8wDzkSu Content-Type: application/x-bzip2 Content-Disposition: attachment; filename="xfssyncd_debug.tar.bz2" Content-Transfer-Encoding: base64 QlpoOTFBWSZTWTnkuicBOdH/////////////////////////////////////////////4Ik/ PqxqxBebutTWJVQqQEAJABVEAAmwwsh9ONZHHRoGRoh7uVwB2xCVzZJVUeWIkAAggDjaCopE VzgAWdBrJKC3s52VlLTXwPgBAAEAAQAlRInvgAD3eAA2A+gADe+1XrZsLtuPd4j0fDyfVjUA UAEPMfIUO2AGgBdjFKgoFFDpiOgAAAAGnZgAADkbsaAABQd2OUgAAB72HQAAAC2NX20AAA3Y HQ6AAYCDuemhbGlBok2xtjbPABHUgO7jijmymszaUKKgbViAbZbDW2oaMioolKCqK1baaFKq VABSSEWsSMoRUiIyNMgCMmFMwpg0Iwm0JmkZNGpslT/RMxT01PTU8mmjTJpiY0mj1GJiNTGJ T9Kn5NlPTSm2mgBNTHkCZTbIjKfppqbQAm0E1PT1T1PJ6CGaqf6qDTQDUSSiEjE0eQjRoYg0 NAAAAAAAAAAAAAAAAAAAGgNAAAAAAAAAAAAAEkm9VIielNJ5TyeoIAaZDQ0AyaaAA00wQGJg gxBhMQ0aA0AAAyA0MEaNGhhDQaZAwE0ADTQDQAAAAJNJEREkGptMpkaDTQGhoAAGjQAAAADQ 0AAAAAAAAAANBoAAAAaGgAAAAAAAATVJIgjRDBGVP0p6PSmZFNtTU/UeSeTIo3lTeqP1MUeM 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with ESMTP id oBPKMdQB125009 for ; Sat, 25 Dec 2010 14:22:39 -0600 X-ASG-Debug-ID: 1293308678-276200db0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from swampdragon.chaosbits.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id BC4F221F2B2; Sat, 25 Dec 2010 12:24:38 -0800 (PST) Received: from swampdragon.chaosbits.net (swampdragon.chaosbits.net [90.184.90.115]) by cuda.sgi.com with ESMTP id LFfN0aUzMvYwZ3FT; Sat, 25 Dec 2010 12:24:38 -0800 (PST) Received: by swampdragon.chaosbits.net (Postfix, from userid 1000) id 064E99403F; Sat, 25 Dec 2010 21:14:54 +0100 (CET) Received: from localhost (localhost [127.0.0.1]) by swampdragon.chaosbits.net (Postfix) with ESMTP id F32E29403B; Sat, 25 Dec 2010 21:14:53 +0100 (CET) Date: Sat, 25 Dec 2010 21:14:53 +0100 (CET) From: Jesper Juhl To: xfs@oss.sgi.com cc: xfs-masters@oss.sgi.com, linux-kernel@vger.kernel.org, Alex Elder X-ASG-Orig-Subj: [PATCH] XFS: Compare, don't assign in ASSERT() in xfs_trans_unreserve_and_mod_sb() Subject: [PATCH] XFS: Compare, don't assign in ASSERT() in xfs_trans_unreserve_and_mod_sb() Message-ID: User-Agent: Alpine 2.00 (LNX 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Barracuda-Connect: swampdragon.chaosbits.net[90.184.90.115] X-Barracuda-Start-Time: 1293308679 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50483 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Hi, In fs/xfs/xfs_trans.c::xfs_trans_unreserve_and_mod_sb() at the out: label we have this: ASSERT(error = 0); I believe a comparison was intended, not an assignment. If I'm right, the patch below fixes that up. Signed-off-by: Jesper Juhl --- xfs_trans.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) compile tested only. diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c index f6d956b..0e312b9 100644 --- a/fs/xfs/xfs_trans.c +++ b/fs/xfs/xfs_trans.c @@ -1137,7 +1137,7 @@ out_undo_fdblocks: if (blkdelta) xfs_icsb_modify_counters(mp, XFS_SBS_FDBLOCKS, -blkdelta, rsvd); out: - ASSERT(error = 0); + ASSERT(error == 0); return; } -- Jesper Juhl http://www.chaosbits.net/ Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html Plain text mails only, please. 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VL Business Hub Box 2 Ground Floor, Gaisano Mactan Pajo, Lapu-Lapu, Cebu 6015, PHILIPPINES Request generated by: IP: 194.65.95.235 Date: December 26, 2010 02:14 EST From SRS0++WWN+30+fromorbit.com=david@internode.on.net Sun Dec 26 20:17:07 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBR2H70i247973 for ; Sun, 26 Dec 2010 20:17:07 -0600 X-ASG-Debug-ID: 1293416346-0614015b0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 70C7F1530F95 for ; Sun, 26 Dec 2010 18:19:07 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id lC06ihmMYz7Bbj6G for ; Sun, 26 Dec 2010 18:19:07 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 51097243-1927428 for multiple; Mon, 27 Dec 2010 12:49:06 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PX2fw-00039f-Iz; Mon, 27 Dec 2010 13:19:04 +1100 Date: Mon, 27 Dec 2010 13:19:04 +1100 From: Dave Chinner To: Petre Rodan Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down Message-ID: <20101227021904.GA24828@dastard> References: <20101223165532.GA23813@peter.simplex.ro> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101223165532.GA23813@peter.simplex.ro> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1293416348 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50602 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 23, 2010 at 06:55:32PM +0200, Petre Rodan wrote: > > Hello, > > I have a problem with a hard drive that never managed to spin > down. this drive is a storage space, not a system disk, the only > thing that generated writes is the nfs server that exports its > contents. it has only one large xfs partition on it. > > upon closer inspection it turns out that after the first Write > action to that partition, an xfssyncd process continues to write > to that partition each 36 seconds and it doesn't stop doing that, > even if there are no more Writes from the exterior. this keeps the > drive busy with varying consequences. more about that later. Should be fixed in 2.6.37 by the commit: 1a387d3 xfs: dummy transactions should not dirty VFS state Cheers, Dave. -- Dave Chinner david@fromorbit.com From petre.rodan@simplex.ro Mon Dec 27 00:13:13 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBR6DC24003062 for ; Mon, 27 Dec 2010 00:13:13 -0600 X-ASG-Debug-ID: 1293430512-29e400780000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from dal02.mx.dnspark.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 802D41531449 for ; Sun, 26 Dec 2010 22:15:12 -0800 (PST) Received: from dal02.mx.dnspark.net (dal02.mx.dnspark.net [67.228.184.121]) by cuda.sgi.com with ESMTP id ifrmZkQILC0I1ZtN for ; Sun, 26 Dec 2010 22:15:12 -0800 (PST) Received: from pandora.simplex.ro (unknown [188.25.55.5]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by dal02.mx.dnspark.net (Postfix) with ESMTPSA id 7F01C194332; Mon, 27 Dec 2010 00:15:11 -0600 (CST) Date: Mon, 27 Dec 2010 08:16:29 +0200 From: Petre Rodan To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down Message-ID: <20101227061629.GA2275@pandora.simplex.ro> References: <20101223165532.GA23813@peter.simplex.ro> <20101227021904.GA24828@dastard> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="WIyZ46R2i8wDzkSu" Content-Disposition: inline In-Reply-To: <20101227021904.GA24828@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-Barracuda-Connect: dal02.mx.dnspark.net[67.228.184.121] X-Barracuda-Start-Time: 1293430513 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50617 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --WIyZ46R2i8wDzkSu Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello Dave, On Mon, Dec 27, 2010 at 01:19:04PM +1100, Dave Chinner wrote: > On Thu, Dec 23, 2010 at 06:55:32PM +0200, Petre Rodan wrote: > >=20 > > Hello, [..] > > upon closer inspection it turns out that after the first Write > > action to that partition, an xfssyncd process continues to write > > to that partition each 36 seconds and it doesn't stop doing that, > > even if there are no more Writes from the exterior. this keeps the > > drive busy with varying consequences. more about that later. >=20 > Should be fixed in 2.6.37 by the commit: >=20 > 1a387d3 xfs: dummy transactions should not dirty VFS state nice that someone else was also keen on having this bug fixed, but this par= ticular fix is already present in 2.6.36 [1], [2] unfortunately something is still written to the log every 36s, as per the f= irst mail in this thread. I guess we're getting closer. [1] http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.36 [2] http://git.kernel.org/?p=3Dlinux/kernel/git/stable/linux-2.6.36.y.git;a= =3Dcommit;h=3D871eae4891a844e1fd065467b940f98dbf7aad1c cheers, peter --WIyZ46R2i8wDzkSu Content-Type: application/pgp-signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.16 (GNU/Linux) iEYEABECAAYFAk0YLz0ACgkQixMPpwVd7zGMqACfeWaW8a37KFpgq9boy2Uhlexp SZUAn2s+c38widpGyLgYqMTq7OxP3ac2 =U46I -----END PGP SIGNATURE----- --WIyZ46R2i8wDzkSu-- From SRS0++WWN+30+fromorbit.com=david@internode.on.net Mon Dec 27 08:06:05 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_53 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBRE64wJ022541 for ; Mon, 27 Dec 2010 08:06:04 -0600 X-ASG-Debug-ID: 1293458883-1c71026c0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 9F0D21531846 for ; Mon, 27 Dec 2010 06:08:03 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id 5HVQovrdRqheTqwS for ; Mon, 27 Dec 2010 06:08:03 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 51127630-1927428 for multiple; Tue, 28 Dec 2010 00:38:02 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PXDjq-0003vG-Hv; Tue, 28 Dec 2010 01:07:50 +1100 Date: Tue, 28 Dec 2010 01:07:50 +1100 From: Dave Chinner To: Petre Rodan Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down Message-ID: <20101227140750.GB24828@dastard> References: <20101223165532.GA23813@peter.simplex.ro> <20101227021904.GA24828@dastard> <20101227061629.GA2275@pandora.simplex.ro> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101227061629.GA2275@pandora.simplex.ro> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1293458885 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50649 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 27, 2010 at 08:16:29AM +0200, Petre Rodan wrote: > > Hello Dave, > > On Mon, Dec 27, 2010 at 01:19:04PM +1100, Dave Chinner wrote: > > On Thu, Dec 23, 2010 at 06:55:32PM +0200, Petre Rodan wrote: > > > > > > Hello, > [..] > > > upon closer inspection it turns out that after the first Write > > > action to that partition, an xfssyncd process continues to write > > > to that partition each 36 seconds and it doesn't stop doing that, > > > even if there are no more Writes from the exterior. this keeps the > > > drive busy with varying consequences. more about that later. > > > > Should be fixed in 2.6.37 by the commit: > > > > 1a387d3 xfs: dummy transactions should not dirty VFS state > > nice that someone else was also keen on having this bug fixed, but this particular fix is already present in 2.6.36 [1], [2] > > unfortunately something is still written to the log every 36s, as per the first mail in this thread. Turn on the XFS tracing so we can see what is being written every 36s. When the problem shows up: # echo 1 > /sys/kernel/debug/tracing/events/xfs/enable # sleep 100 # cat /sys/kernel/debug/tracing/trace > trace.out # echo 0 > /sys/kernel/debug/tracing/events/xfs/enable And post the trace.out file for us to look at. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0++WWN+30+fromorbit.com=david@internode.on.net Mon Dec 27 08:12:13 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_65 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBRECDfE022858 for ; Mon, 27 Dec 2010 08:12:13 -0600 X-ASG-Debug-ID: 1293459250-2acc01760000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0A48C22165F; Mon, 27 Dec 2010 06:14:11 -0800 (PST) Received: from mail.internode.on.net (bld-mail14.adl6.internode.on.net [150.101.137.99]) by cuda.sgi.com with ESMTP id wRyEHaHC7J0GK4YA; Mon, 27 Dec 2010 06:14:11 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 51644094-1927428 for multiple; Tue, 28 Dec 2010 00:44:00 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PXDpm-0003vz-1d; Tue, 28 Dec 2010 01:13:58 +1100 Date: Tue, 28 Dec 2010 01:13:57 +1100 From: Dave Chinner To: Jesper Juhl Cc: xfs@oss.sgi.com, xfs-masters@oss.sgi.com, linux-kernel@vger.kernel.org, Alex Elder X-ASG-Orig-Subj: Re: [PATCH] XFS: Compare, don't assign in ASSERT() in xfs_trans_unreserve_and_mod_sb() Subject: Re: [PATCH] XFS: Compare, don't assign in ASSERT() in xfs_trans_unreserve_and_mod_sb() Message-ID: <20101227141357.GC24828@dastard> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail14.adl6.internode.on.net[150.101.137.99] X-Barracuda-Start-Time: 1293459253 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0001 1.0000 -2.0203 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50648 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Sat, Dec 25, 2010 at 09:14:53PM +0100, Jesper Juhl wrote: > Hi, > > In fs/xfs/xfs_trans.c::xfs_trans_unreserve_and_mod_sb() at the out: label > we have this: > ASSERT(error = 0); > I believe a comparison was intended, not an assignment. If I'm right, the > patch below fixes that up. Already fixed in this patch pending for 2.6.38: http://git.kernel.org/?p=linux/kernel/git/dgc/xfsdev.git;a=commitdiff;h=831ef3cf682a1f9d8fc7c16dace55137751c0410 Cheers, Dave. -- Dave Chinner david@fromorbit.com From aelder@sgi.com Mon Dec 27 08:56:01 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_72 autolearn=no version=3.4.0-r929098 Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBREu1VU024498 for ; Mon, 27 Dec 2010 08:56:01 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay1.corp.sgi.com (Postfix) with ESMTP id C77918F8074; Mon, 27 Dec 2010 06:58:00 -0800 (PST) Received: from [127.0.0.1] ([198.149.20.12]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Mon, 27 Dec 2010 08:57:36 -0600 Subject: Re: [PATCH 06/34] xfs: dynamic speculative EOF preallocation From: Alex Elder Reply-To: aelder@sgi.com To: Dave Chinner Cc: xfs@oss.sgi.com In-Reply-To: <1292916570-25015-7-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-7-git-send-email-david@fromorbit.com> Content-Type: text/plain; charset="UTF-8" Date: Mon, 27 Dec 2010 08:57:36 -0600 Message-ID: <1293461856.2192.36.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: quoted-printable X-OriginalArrivalTime: 27 Dec 2010 14:57:36.0709 (UTC) FILETIME=[663D9F50:01CBA5D6] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, 2010-12-21 at 18:29 +1100, Dave Chinner wrote: > From: Dave Chinner >=20 > Currently the size of the speculative preallocation during delayed > allocation is fixed by either the allocsize mount option of a > default size. We are seeing a lot of cases where we need to > recommend using the allocsize mount option to prevent fragmentation > when buffered writes land in the same AG. This looks good. Logarithmic reduction in the size as the file system gets close to full seems like a reasonable heuristic. I have a few minor comments below, which you can address at your option. In any case: Reviewed-by: Alex Elder >=20 > Rather than using a fixed preallocation size by default (up to 64k), > make it dynamic by basing it on the current inode size. That way the > EOF preallocation will increase as the file size increases. Hence > for streaming writes we are much more likely to get large > preallocations exactly when we need it to reduce fragementation. >=20 > For default settings, the size of the initial extents is determined > by the number of parallel writers and the amount of memory in the > machine. For 4GB RAM and 4 concurrent 32GB file writes: >=20 > EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET = TOTAL > 0: [0..1048575]: 1048672..2097247 0 (1048672..2097247) = 1048576 > 1: [1048576..2097151]: 5242976..6291551 0 (5242976..6291551) = 1048576 > 2: [2097152..4194303]: 12583008..14680159 0 (12583008..14680159) = 2097152 > 3: [4194304..8388607]: 25165920..29360223 0 (25165920..29360223) = 4194304 > 4: [8388608..16777215]: 58720352..67108959 0 (58720352..67108959) = 8388608 > 5: [16777216..33554423]: 117440584..134217791 0 (117440584..134217791= ) 16777208 > 6: [33554424..50331511]: 184549056..201326143 0 (184549056..201326143= ) 16777088 > 7: [50331512..67108599]: 251657408..268434495 0 (251657408..268434495= ) 16777088 >=20 > and for 16 concurrent 16GB file writes: >=20 > EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET = TOTAL > 0: [0..262143]: 2490472..2752615 0 (2490472..2752615) = 262144 > 1: [262144..524287]: 6291560..6553703 0 (6291560..6553703) = 262144 > 2: [524288..1048575]: 13631592..14155879 0 (13631592..14155879) = 524288 > 3: [1048576..2097151]: 30408808..31457383 0 (30408808..31457383) = 1048576 > 4: [2097152..4194303]: 52428904..54526055 0 (52428904..54526055) = 2097152 > 5: [4194304..8388607]: 104857704..109052007 0 (104857704..109052007= ) 4194304 > 6: [8388608..16777215]: 209715304..218103911 0 (209715304..218103911= ) 8388608 > 7: [16777216..33554423]: 452984848..469762055 0 (452984848..469762055= ) 16777208 >=20 > Because it is hard to take back specualtive preallocation, cases > where there are large slow growing log files on a nearly full > filesystem may cause premature ENOSPC. Hence as the filesystem nears > full, the maximum dynamic prealloc size =D1=96s reduced according to this > table (based on 4k block size): >=20 > freespace max prealloc size > >5% full extent (8GB) > 4-5% 2GB (8GB >> 2) > 3-4% 1GB (8GB >> 3) > 2-3% 512MB (8GB >> 4) > 1-2% 256MB (8GB >> 5) > <1% 128MB (8GB >> 6) On really small filesystems this might be excessive. On the other hand, you're already basing the size on the file size so that should limit things just fine. > This should reduce the amount of space held in speculative > preallocation for such cases. >=20 > The allocsize mount option turns off the dynamic behaviour and fixes > the prealloc size to whatever the mount option specifies. i.e. the > behaviour is unchanged. >=20 > Signed-off-by: Dave Chinner > --- > fs/xfs/xfs_fsops.c | 1 + > fs/xfs/xfs_iomap.c | 84 +++++++++++++++++++++++++++++++++++++++++++++-= ----- > fs/xfs/xfs_mount.c | 21 +++++++++++++ > fs/xfs/xfs_mount.h | 14 ++++++++ > 4 files changed, 110 insertions(+), 10 deletions(-) >=20 > diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c > index be34ff2..6d17206 100644 > --- a/fs/xfs/xfs_fsops.c > +++ b/fs/xfs/xfs_fsops.c > @@ -374,6 +374,7 @@ xfs_growfs_data_private( > mp->m_maxicount =3D icount << mp->m_sb.sb_inopblog; > } else > mp->m_maxicount =3D 0; > + xfs_set_low_space_thresholds(mp); > =20 > /* update secondary superblocks. */ > for (agno =3D 1; agno < nagcount; agno++) { > diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c > index 22b62a1..f36d2c8 100644 > --- a/fs/xfs/xfs_iomap.c > +++ b/fs/xfs/xfs_iomap.c > @@ -267,6 +267,9 @@ error_out: > * If the caller is doing a write at the end of the file, then extend th= e > * allocation out to the file system's write iosize. We clean up any ex= tra > * space left over when the file is closed in xfs_inactive(). > + * > + * If we find we already have delalloc preallocation beyond EOF, don't d= o more > + * preallocation as it it not needed. > */ > STATIC int > xfs_iomap_eof_want_preallocate( > @@ -282,6 +285,7 @@ xfs_iomap_eof_want_preallocate( > xfs_filblks_t count_fsb; > xfs_fsblock_t firstblock; > int n, error, imaps; > + int found_delalloc =3D 0; > =20 > *prealloc =3D 0; > if ((offset + count) <=3D ip->i_size) > @@ -306,12 +310,60 @@ xfs_iomap_eof_want_preallocate( > return 0; > start_fsb +=3D imap[n].br_blockcount; > count_fsb -=3D imap[n].br_blockcount; > + > + if (imap[n].br_startblock =3D=3D DELAYSTARTBLOCK) > + found_delalloc =3D 1; > } > } > - *prealloc =3D 1; > + if (!found_delalloc) > + *prealloc =3D 1; Isn't this a separate change, possibly worthy of its own commit? > return 0; > } > =20 > +/* > + * If we don't have a user specified preallocation size, dynamically inc= rease > + * the preallocation size as the size of the file grows. Cap the maximum= size > + * at a single extent or less if the filesystem is near full. The closer= the > + * filesystem is to full, the smaller the maximum prealocation. > + */ > +STATIC xfs_fsblock_t > +xfs_iomap_prealloc_size( > + struct xfs_mount *mp, > + struct xfs_inode *ip) > +{ > + xfs_fsblock_t alloc_blocks =3D 0; > + > + if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { > + int shift =3D 0; > + int64_t freesp; > + > + alloc_blocks =3D XFS_B_TO_FSB(mp, ip->i_size); Why not i_size_read()? Only matters for 32-bit, but you're using do_div() below so you do seem to care about it sometimes. > + alloc_blocks =3D XFS_FILEOFF_MIN(MAXEXTLEN, > + rounddown_pow_of_two(alloc_blocks)); > + > + freesp =3D percpu_counter_read_positive( > + &mp->m_icsb[XFS_ICSB_FDBLOCKS]); > + if (freesp < mp->m_low_space[XFS_LOWSP_5_PCNT]) { > + shift =3D 2; > + if (freesp < mp->m_low_space[XFS_LOWSP_4_PCNT]) > + shift++; > + if (freesp < mp->m_low_space[XFS_LOWSP_3_PCNT]) > + shift++; > + if (freesp < mp->m_low_space[XFS_LOWSP_2_PCNT]) > + shift++; > + if (freesp < mp->m_low_space[XFS_LOWSP_1_PCNT]) > + shift++; > + } > + if (shift) > + alloc_blocks >>=3D shift; > + } > + > + if (alloc_blocks < mp->m_writeio_blocks) > + alloc_blocks =3D mp->m_writeio_blocks; > + > + return alloc_blocks; > +} > + > int > xfs_iomap_write_delay( > xfs_inode_t *ip, > @@ -344,6 +396,7 @@ xfs_iomap_write_delay( > extsz =3D xfs_get_extsz_hint(ip); > offset_fsb =3D XFS_B_TO_FSBT(mp, offset); > =20 > + Extra blank line. > error =3D xfs_iomap_eof_want_preallocate(mp, ip, offset, count, > imap, XFS_WRITE_IMAPS, &prealloc); > if (error) > @@ -351,9 +404,11 @@ xfs_iomap_write_delay( > =20 > retry: > if (prealloc) { > + xfs_fsblock_t alloc_blocks =3D xfs_iomap_prealloc_size(mp, ip); > + > aligned_offset =3D XFS_WRITEIO_ALIGN(mp, (offset + count - 1)); > ioalign =3D XFS_B_TO_FSBT(mp, aligned_offset); > - last_fsb =3D ioalign + mp->m_writeio_blocks; > + last_fsb =3D ioalign + alloc_blocks; > } else { > last_fsb =3D XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); > } > @@ -371,22 +426,31 @@ retry: > XFS_BMAPI_DELAY | XFS_BMAPI_WRITE | > XFS_BMAPI_ENTIRE, &firstblock, 1, imap, > &nimaps, NULL); > - if (error && (error !=3D ENOSPC)) > + switch (error) { > + case 0: > + case ENOSPC: > + case EDQUOT: > + break; This (above and below, in this hunk) is also a separate change, possibly worthy of its own small commit. > + default: > return XFS_ERROR(error); > + } > =20 > /* > - * If bmapi returned us nothing, and if we didn't get back EDQUOT, > - * then we must have run out of space - flush all other inodes with > - * delalloc blocks and retry without EOF preallocation. > + * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. For > + * ENOSPC, * flush all other inodes with delalloc blocks to free up > + * some of the excess reserved metadata space. For both cases, retry > + * without EOF preallocation. > */ > if (nimaps =3D=3D 0) { > trace_xfs_delalloc_enospc(ip, offset, count); > if (flushed) > - return XFS_ERROR(ENOSPC); > + return XFS_ERROR(error ? error : ENOSPC); > =20 > - xfs_iunlock(ip, XFS_ILOCK_EXCL); > - xfs_flush_inodes(ip); > - xfs_ilock(ip, XFS_ILOCK_EXCL); > + if (error =3D=3D ENOSPC) { > + xfs_iunlock(ip, XFS_ILOCK_EXCL); > + xfs_flush_inodes(ip); > + xfs_ilock(ip, XFS_ILOCK_EXCL); > + } > =20 > flushed =3D 1; > error =3D 0; > diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c > index d5710232..f1b094d 100644 > --- a/fs/xfs/xfs_mount.c > +++ b/fs/xfs/xfs_mount.c > @@ -1101,6 +1101,24 @@ xfs_set_rw_sizes(xfs_mount_t *mp) > } > =20 > /* > + * precalculate the low space thresholds for dynamic speculative preallo= cation. > + */ > +void > +xfs_set_low_space_thresholds( > + struct xfs_mount *mp) > +{ > + int i; > + > + for (i =3D 0; i < XFS_LOWSP_MAX; i++) { > + __uint64_t space =3D mp->m_sb.sb_dblocks; > + > + do_div(space, 100); How about computing this once, outside the loop? > + mp->m_low_space[i] =3D space * (i + 1); > + } > +} > + > + > +/* > * Set whether we're using inode alignment. > */ > STATIC void > @@ -1322,6 +1340,9 @@ xfs_mountfs( > */ > xfs_set_rw_sizes(mp); > =20 > + /* set the low space thresholds for dynamic preallocation */ > + xfs_set_low_space_thresholds(mp); > + > /* > * Set the inode cluster size. > * This may still be overridden by the file system > diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h > index 03ad25c6..7b42e04 100644 > --- a/fs/xfs/xfs_mount.h > +++ b/fs/xfs/xfs_mount.h > @@ -75,6 +75,16 @@ enum { > XFS_ICSB_MAX, > }; > =20 > +/* dynamic preallocation free space thresholds, 5% down to 1% */ > +enum { > + XFS_LOWSP_1_PCNT =3D 0, Why not make 1% be 1, 2% be 2, etc.? > + XFS_LOWSP_2_PCNT, > + XFS_LOWSP_3_PCNT, > + XFS_LOWSP_4_PCNT, > + XFS_LOWSP_5_PCNT, > + XFS_LOWSP_MAX, > +}; > + > typedef struct xfs_mount { > struct super_block *m_super; > xfs_tid_t m_tid; /* next unused tid for fs */ > @@ -169,6 +179,8 @@ typedef struct xfs_mount { > on the next remount,rw */ > struct shrinker m_inode_shrink; /* inode reclaim shrinker */ > struct percpu_counter m_icsb[XFS_ICSB_MAX]; > + int64_t m_low_space[XFS_LOWSP_MAX]; > + /* low free space thresholds */ > } xfs_mount_t; > =20 > /* > @@ -333,6 +345,8 @@ extern void xfs_icsb_sync_counters(struct xfs_mount *= ); > extern int xfs_icsb_modify_inodes(struct xfs_mount *, int, int64_t); > extern int xfs_icsb_modify_free_blocks(struct xfs_mount *, int64_t, int)= ; > =20 > +extern void xfs_set_low_space_thresholds(struct xfs_mount *); > + > #endif /* __KERNEL__ */ > =20 > extern void xfs_mod_sb(struct xfs_trans *, __int64_t); From aelder@sgi.com Mon Dec 27 08:59:06 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_72 autolearn=no version=3.4.0-r929098 Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBREx6ag024619 for ; Mon, 27 Dec 2010 08:59:06 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay2.corp.sgi.com (Postfix) with ESMTP id 26BEB30406B; Mon, 27 Dec 2010 07:01:06 -0800 (PST) Received: from [127.0.0.1] ([198.149.20.12]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Mon, 27 Dec 2010 09:00:56 -0600 Subject: Re: [PATCH 06/34] xfs: dynamic speculative EOF preallocation From: Alex Elder Reply-To: aelder@sgi.com To: Dave Chinner Cc: xfs@oss.sgi.com In-Reply-To: <1292916570-25015-7-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-7-git-send-email-david@fromorbit.com> Content-Type: text/plain; charset="UTF-8" Date: Mon, 27 Dec 2010 09:00:56 -0600 Message-ID: <1293462056.3851.1.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: quoted-printable X-OriginalArrivalTime: 27 Dec 2010 15:00:56.0586 (UTC) FILETIME=[DD606EA0:01CBA5D6] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, 2010-12-21 at 18:29 +1100, Dave Chinner wrote:=20 > From: Dave Chinner >=20 > Currently the size of the speculative preallocation during delayed > allocation is fixed by either the allocsize mount option of a > default size. We are seeing a lot of cases where we need to > recommend using the allocsize mount option to prevent fragmentation > when buffered writes land in the same AG. This looks good. Logarithmic reduction in the size as the file system gets close to full seems like a reasonable heuristic. A few more minor comments below, which you can address at your option. In any case: Reviewed-by: Alex Elder >=20 > Rather than using a fixed preallocation size by default (up to 64k), > make it dynamic by basing it on the current inode size. That way the > EOF preallocation will increase as the file size increases. Hence > for streaming writes we are much more likely to get large > preallocations exactly when we need it to reduce fragementation. >=20 > For default settings, the size of the initial extents is determined > by the number of parallel writers and the amount of memory in the > machine. For 4GB RAM and 4 concurrent 32GB file writes: >=20 > EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET = TOTAL > 0: [0..1048575]: 1048672..2097247 0 (1048672..2097247) = 1048576 > 1: [1048576..2097151]: 5242976..6291551 0 (5242976..6291551) = 1048576 > 2: [2097152..4194303]: 12583008..14680159 0 (12583008..14680159) = 2097152 > 3: [4194304..8388607]: 25165920..29360223 0 (25165920..29360223) = 4194304 > 4: [8388608..16777215]: 58720352..67108959 0 (58720352..67108959) = 8388608 > 5: [16777216..33554423]: 117440584..134217791 0 (117440584..134217791= ) 16777208 > 6: [33554424..50331511]: 184549056..201326143 0 (184549056..201326143= ) 16777088 > 7: [50331512..67108599]: 251657408..268434495 0 (251657408..268434495= ) 16777088 >=20 > and for 16 concurrent 16GB file writes: >=20 > EXT: FILE-OFFSET BLOCK-RANGE AG AG-OFFSET = TOTAL > 0: [0..262143]: 2490472..2752615 0 (2490472..2752615) = 262144 > 1: [262144..524287]: 6291560..6553703 0 (6291560..6553703) = 262144 > 2: [524288..1048575]: 13631592..14155879 0 (13631592..14155879) = 524288 > 3: [1048576..2097151]: 30408808..31457383 0 (30408808..31457383) = 1048576 > 4: [2097152..4194303]: 52428904..54526055 0 (52428904..54526055) = 2097152 > 5: [4194304..8388607]: 104857704..109052007 0 (104857704..109052007= ) 4194304 > 6: [8388608..16777215]: 209715304..218103911 0 (209715304..218103911= ) 8388608 > 7: [16777216..33554423]: 452984848..469762055 0 (452984848..469762055= ) 16777208 >=20 > Because it is hard to take back specualtive preallocation, cases > where there are large slow growing log files on a nearly full > filesystem may cause premature ENOSPC. Hence as the filesystem nears > full, the maximum dynamic prealloc size =D1=96s reduced according to this > table (based on 4k block size): >=20 > freespace max prealloc size > >5% full extent (8GB) > 4-5% 2GB (8GB >> 2) > 3-4% 1GB (8GB >> 3) > 2-3% 512MB (8GB >> 4) > 1-2% 256MB (8GB >> 5) > <1% 128MB (8GB >> 6) On really small filesystems this might be excessive. On the other hand, you're already basing the size on the file size so that should limit things just fine. > This should reduce the amount of space held in speculative > preallocation for such cases. >=20 > The allocsize mount option turns off the dynamic behaviour and fixes > the prealloc size to whatever the mount option specifies. i.e. the > behaviour is unchanged. >=20 > Signed-off-by: Dave Chinner > --- > fs/xfs/xfs_fsops.c | 1 + > fs/xfs/xfs_iomap.c | 84 +++++++++++++++++++++++++++++++++++++++++++++-= ----- > fs/xfs/xfs_mount.c | 21 +++++++++++++ > fs/xfs/xfs_mount.h | 14 ++++++++ > 4 files changed, 110 insertions(+), 10 deletions(-) >=20 > diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c > index be34ff2..6d17206 100644 > --- a/fs/xfs/xfs_fsops.c > +++ b/fs/xfs/xfs_fsops.c > @@ -374,6 +374,7 @@ xfs_growfs_data_private( > mp->m_maxicount =3D icount << mp->m_sb.sb_inopblog; > } else > mp->m_maxicount =3D 0; > + xfs_set_low_space_thresholds(mp); > =20 > /* update secondary superblocks. */ > for (agno =3D 1; agno < nagcount; agno++) { > diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c > index 22b62a1..f36d2c8 100644 > --- a/fs/xfs/xfs_iomap.c > +++ b/fs/xfs/xfs_iomap.c > @@ -267,6 +267,9 @@ error_out: > * If the caller is doing a write at the end of the file, then extend th= e > * allocation out to the file system's write iosize. We clean up any ex= tra > * space left over when the file is closed in xfs_inactive(). > + * > + * If we find we already have delalloc preallocation beyond EOF, don't d= o more > + * preallocation as it it not needed. > */ > STATIC int > xfs_iomap_eof_want_preallocate( > @@ -282,6 +285,7 @@ xfs_iomap_eof_want_preallocate( > xfs_filblks_t count_fsb; > xfs_fsblock_t firstblock; > int n, error, imaps; > + int found_delalloc =3D 0; > =20 > *prealloc =3D 0; > if ((offset + count) <=3D ip->i_size) > @@ -306,12 +310,60 @@ xfs_iomap_eof_want_preallocate( > return 0; > start_fsb +=3D imap[n].br_blockcount; > count_fsb -=3D imap[n].br_blockcount; > + > + if (imap[n].br_startblock =3D=3D DELAYSTARTBLOCK) > + found_delalloc =3D 1; > } > } > - *prealloc =3D 1; > + if (!found_delalloc) > + *prealloc =3D 1; Isn't this a separate change, possibly worthy of its own commit? > return 0; > } > =20 > +/* > + * If we don't have a user specified preallocation size, dynamically inc= rease > + * the preallocation size as the size of the file grows. Cap the maximum= size > + * at a single extent or less if the filesystem is near full. The closer= the > + * filesystem is to full, the smaller the maximum prealocation. > + */ > +STATIC xfs_fsblock_t > +xfs_iomap_prealloc_size( > + struct xfs_mount *mp, > + struct xfs_inode *ip) > +{ > + xfs_fsblock_t alloc_blocks =3D 0; > + > + if (!(mp->m_flags & XFS_MOUNT_DFLT_IOSIZE)) { > + int shift =3D 0; > + int64_t freesp; > + > + alloc_blocks =3D XFS_B_TO_FSB(mp, ip->i_size); Why not i_size_read()? Only matters for 32-bit, but you're using do_div() below so you do seem to care about it sometimes. > + alloc_blocks =3D XFS_FILEOFF_MIN(MAXEXTLEN, > + rounddown_pow_of_two(alloc_blocks)); > + > + freesp =3D percpu_counter_read_positive( > + &mp->m_icsb[XFS_ICSB_FDBLOCKS]); > + if (freesp < mp->m_low_space[XFS_LOWSP_5_PCNT]) { > + shift =3D 2; > + if (freesp < mp->m_low_space[XFS_LOWSP_4_PCNT]) > + shift++; > + if (freesp < mp->m_low_space[XFS_LOWSP_3_PCNT]) > + shift++; > + if (freesp < mp->m_low_space[XFS_LOWSP_2_PCNT]) > + shift++; > + if (freesp < mp->m_low_space[XFS_LOWSP_1_PCNT]) > + shift++; > + } > + if (shift) > + alloc_blocks >>=3D shift; > + } > + > + if (alloc_blocks < mp->m_writeio_blocks) > + alloc_blocks =3D mp->m_writeio_blocks; > + > + return alloc_blocks; > +} > + > int > xfs_iomap_write_delay( > xfs_inode_t *ip, > @@ -344,6 +396,7 @@ xfs_iomap_write_delay( > extsz =3D xfs_get_extsz_hint(ip); > offset_fsb =3D XFS_B_TO_FSBT(mp, offset); > =20 > + Extra blank line. > error =3D xfs_iomap_eof_want_preallocate(mp, ip, offset, count, > imap, XFS_WRITE_IMAPS, &prealloc); > if (error) > @@ -351,9 +404,11 @@ xfs_iomap_write_delay( > =20 > retry: > if (prealloc) { > + xfs_fsblock_t alloc_blocks =3D xfs_iomap_prealloc_size(mp, ip); > + > aligned_offset =3D XFS_WRITEIO_ALIGN(mp, (offset + count - 1)); > ioalign =3D XFS_B_TO_FSBT(mp, aligned_offset); > - last_fsb =3D ioalign + mp->m_writeio_blocks; > + last_fsb =3D ioalign + alloc_blocks; > } else { > last_fsb =3D XFS_B_TO_FSB(mp, ((xfs_ufsize_t)(offset + count))); > } > @@ -371,22 +426,31 @@ retry: > XFS_BMAPI_DELAY | XFS_BMAPI_WRITE | > XFS_BMAPI_ENTIRE, &firstblock, 1, imap, > &nimaps, NULL); > - if (error && (error !=3D ENOSPC)) > + switch (error) { > + case 0: > + case ENOSPC: > + case EDQUOT: > + break; This (above and below, in this hunk) is also a separate change, possibly worthy of its own small commit. > + default: > return XFS_ERROR(error); > + } > =20 > /* > - * If bmapi returned us nothing, and if we didn't get back EDQUOT, > - * then we must have run out of space - flush all other inodes with > - * delalloc blocks and retry without EOF preallocation. > + * If bmapi returned us nothing, we got either ENOSPC or EDQUOT. For > + * ENOSPC, * flush all other inodes with delalloc blocks to free up > + * some of the excess reserved metadata space. For both cases, retry > + * without EOF preallocation. > */ > if (nimaps =3D=3D 0) { > trace_xfs_delalloc_enospc(ip, offset, count); > if (flushed) > - return XFS_ERROR(ENOSPC); > + return XFS_ERROR(error ? error : ENOSPC); > =20 > - xfs_iunlock(ip, XFS_ILOCK_EXCL); > - xfs_flush_inodes(ip); > - xfs_ilock(ip, XFS_ILOCK_EXCL); > + if (error =3D=3D ENOSPC) { > + xfs_iunlock(ip, XFS_ILOCK_EXCL); > + xfs_flush_inodes(ip); > + xfs_ilock(ip, XFS_ILOCK_EXCL); > + } > =20 > flushed =3D 1; > error =3D 0; > diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c > index d5710232..f1b094d 100644 > --- a/fs/xfs/xfs_mount.c > +++ b/fs/xfs/xfs_mount.c > @@ -1101,6 +1101,24 @@ xfs_set_rw_sizes(xfs_mount_t *mp) > } > =20 > /* > + * precalculate the low space thresholds for dynamic speculative preallo= cation. > + */ > +void > +xfs_set_low_space_thresholds( > + struct xfs_mount *mp) > +{ > + int i; > + > + for (i =3D 0; i < XFS_LOWSP_MAX; i++) { > + __uint64_t space =3D mp->m_sb.sb_dblocks; > + > + do_div(space, 100); How about computing this once, outside the loop? > + mp->m_low_space[i] =3D space * (i + 1); > + } > +} > + > + > +/* > * Set whether we're using inode alignment. > */ > STATIC void > @@ -1322,6 +1340,9 @@ xfs_mountfs( > */ > xfs_set_rw_sizes(mp); > =20 > + /* set the low space thresholds for dynamic preallocation */ > + xfs_set_low_space_thresholds(mp); > + > /* > * Set the inode cluster size. > * This may still be overridden by the file system > diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h > index 03ad25c6..7b42e04 100644 > --- a/fs/xfs/xfs_mount.h > +++ b/fs/xfs/xfs_mount.h > @@ -75,6 +75,16 @@ enum { > XFS_ICSB_MAX, > }; > =20 > +/* dynamic preallocation free space thresholds, 5% down to 1% */ > +enum { > + XFS_LOWSP_1_PCNT =3D 0, Why not make 1% be 1, 2% be 2, etc.? > + XFS_LOWSP_2_PCNT, > + XFS_LOWSP_3_PCNT, > + XFS_LOWSP_4_PCNT, > + XFS_LOWSP_5_PCNT, > + XFS_LOWSP_MAX, > +}; > + > typedef struct xfs_mount { > struct super_block *m_super; > xfs_tid_t m_tid; /* next unused tid for fs */ > @@ -169,6 +179,8 @@ typedef struct xfs_mount { > on the next remount,rw */ > struct shrinker m_inode_shrink; /* inode reclaim shrinker */ > struct percpu_counter m_icsb[XFS_ICSB_MAX]; > + int64_t m_low_space[XFS_LOWSP_MAX]; > + /* low free space thresholds */ > } xfs_mount_t; > =20 > /* > @@ -333,6 +345,8 @@ extern void xfs_icsb_sync_counters(struct xfs_mount *= ); > extern int xfs_icsb_modify_inodes(struct xfs_mount *, int, int64_t); > extern int xfs_icsb_modify_free_blocks(struct xfs_mount *, int64_t, int)= ; > =20 > +extern void xfs_set_low_space_thresholds(struct xfs_mount *); > + > #endif /* __KERNEL__ */ > =20 > extern void xfs_mod_sb(struct xfs_trans *, __int64_t); From petre.rodan@simplex.ro Mon Dec 27 11:16:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_53 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBRHGM0f031303 for ; Mon, 27 Dec 2010 11:16:22 -0600 X-ASG-Debug-ID: 1293470300-4ff101770000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from passage.avira.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 83F271DBB078 for ; 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27 Dec 2010 17:18:18 -0000 Received: from unknown (HELO pandora.simplex.ro) (prodan@10.7.0.16) by naliboat.bu.avira.com with ESMTPA; 27 Dec 2010 17:18:18 -0000 Date: Mon, 27 Dec 2010 19:19:39 +0200 From: Petre Rodan To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down Message-ID: <20101227171939.GA7759@pandora.simplex.ro> References: <20101223165532.GA23813@peter.simplex.ro> <20101227021904.GA24828@dastard> <20101227061629.GA2275@pandora.simplex.ro> <20101227140750.GB24828@dastard> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="b5gNqxB1S1yM7hjW" Content-Disposition: inline In-Reply-To: <20101227140750.GB24828@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-AntiVirus: checked by AntiVir MailGate (version: 2.1.3-2; AVE: 7.9.4.128; VDF: 7.11.0.201; host: passage.avira.com) X-Barracuda-Connect: passage.avira.com[89.238.222.20] X-Barracuda-Start-Time: 1293470302 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50660 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --b5gNqxB1S1yM7hjW Content-Type: multipart/mixed; boundary="G4iJoqBmSsgzjUCe" Content-Disposition: inline --G4iJoqBmSsgzjUCe Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello Dave, On Tue, Dec 28, 2010 at 01:07:50AM +1100, Dave Chinner wrote: > Turn on the XFS tracing so we can see what is being written every > 36s. When the problem shows up: >=20 > # echo 1 > /sys/kernel/debug/tracing/events/xfs/enable > # sleep 100 > # cat /sys/kernel/debug/tracing/trace > trace.out > # echo 0 > /sys/kernel/debug/tracing/events/xfs/enable >=20 > And post the trace.out file for us to look at. attached. you can disregard all the lvm partitions ('dev 254:.*') since they are on a= different drive, probably only 8:17 is of interest. bye, peter --G4iJoqBmSsgzjUCe Content-Type: application/x-bzip2 Content-Disposition: attachment; filename="trace.out.bz2" Content-Transfer-Encoding: base64 QlpoOTFBWSZTWUyQ8cUA/iLfgH/0SGP/9T/v/+q/7//0YNueb3qgoA+gI+9V5l7kgAAAd21Z hEA8fEqXFF8zhkZgYCigAC62sy2wDn3Z7xOWV3DrfH33pfL6Z1mK3xgZHeju2wTZjEAQNAAA NfVAoFbnnO5IJNpruQ3bu8mKh4CxDlQKE2xKl1vrQq9M93VVDroGABccBsOzR52+mQAqvesZ TsFBL0x9jRLrbWAA+6L1NnWhvs0k+hpUXdtzNeXICQ5a6YUHQBc6+mHoPpqCNtfe4cvsb2MN a29dNmoAFpVBeYdPfd1IJXWU9N2aUq9t9GXrAAOz5a6ct9PTqfbC7MRL0y9MVptgAN6FsfT3 ZL7GrrI2YiIkfbq7aYAG74eA97ZfYZZbWoqFCqDoWylCABfXtnyNGfYfXlZmjn2B6aMjiFNS 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X-ASG-Debug-ID: 1293552582-3ea4015d0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 0EC451613EEB; Tue, 28 Dec 2010 08:09:42 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id BB0kxAbSInmjQG8S; Tue, 28 Dec 2010 08:09:42 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PXc7I-0000GZ-LG; Tue, 28 Dec 2010 16:09:40 +0000 Date: Tue, 28 Dec 2010 11:09:40 -0500 From: Christoph Hellwig To: Alex Elder Cc: xfs@oss.sgi.com, lczerner@redhat.com X-ASG-Orig-Subj: Re: xfs: add FITRIM support Subject: Re: xfs: add FITRIM support Message-ID: <20101228160940.GA28295@infradead.org> References: <20101125112304.GA4195@infradead.org> <1293054073.2408.374.camel@doink> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1293054073.2408.374.camel@doink> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1293552583 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 22, 2010 at 03:41:13PM -0600, Alex Elder wrote: > > + error = xfs_alloc_read_agf(mp, NULL, agno, > > + XFS_ALLOC_FLAG_TRYLOCK, &agbp); > > + if (error || !agbp) { > > + if (error == EAGAIN) > > + error = 0; > > EAGAIN is ignored because it's an advisory interface, right? > How hard are we expected to try? What I really mean is, > is the benefit of FITRIM enough that we should try again > later when we can get a buffer or lock on it? That was the idea when I wrote this code. But back then we called it regularly from a kernel thread. For FITRIM it makes more sense to just remove the trylock. > I don't know where (or if) FITRIM is precisely documented. > But I question whether truncating down the start offset is > the correct thing to do. If the starting byte offset given > were not block-aligned, it seems like you should not assume > that the caller wanted the bytes below unmapped. (This is > a broader question, not related directly to your change.) > > Similarly, on the length it is probably best to truncate > it, because it avoids any bytes beyond the specified range > getting unmapped. (I.e., in my mind what you did is the > right way to do it.) But these interpretations are > dependent on the specific interpretation of FITRIM... Good question. Adding Lukas to the Cc. I tried to talk him into writing a manpage to document the interface better, but that's only been a few days before the holidays. This is something we should documented. I don't quite understand the need for the range interface anyway. > You don't update range anywhere, so the copyout below > is not really doing anything useful. However I think > it should stay, and the number of bytes actually > trimmed should be updated and returned to the user. > That seems to be what ext4 does (the only reference > I found at the moment for what FITRIM is supposed > to return). Yes, I guess I should update the range. From BATV+05f3ec64611280fa9bf8+2684+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 29 06:50:24 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBTCoLZr064384 for ; Wed, 29 Dec 2010 06:50:24 -0600 X-ASG-Debug-ID: 1293627145-668f035e0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 925281D0151D for ; Wed, 29 Dec 2010 04:52:25 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 0sLT2UedMmsc5lY4 for ; Wed, 29 Dec 2010 04:52:25 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PXvVu-00012w-2j; Wed, 29 Dec 2010 12:52:22 +0000 Date: Wed, 29 Dec 2010 07:52:22 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 30/34] xfs: convert l_tail_lsn to an atomic variable. Subject: Re: [PATCH 30/34] xfs: convert l_tail_lsn to an atomic variable. Message-ID: <20101229125221.GA1035@infradead.org> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-31-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292916570-25015-31-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1293627145 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 06:29:26PM +1100, Dave Chinner wrote: > From: Dave Chinner > > log->l_tail_lsn is currently protected by the log grant lock. The > lock is only needed for serialising readers against writers, so we > don't really need the lock if we make the l_tail_lsn variable an > atomic. Converting the l_tail_lsn variable to an atomic64_t means we > can start to peel back the grant lock from various operations. > > Also, provide functions to safely crack an atomic LSN variable into > it's component pieces and to recombined the components into an > atomic variable. Use them where appropriate. > > This also removes the need for explicitly holding a spinlock to read > the l_tail_lsn on 32 bit platforms. > > Signed-off-by: Dave Chinner Looks good, Reviewed-by: Christoph Hellwig > /* log->l_tail_lsn = 0x100000000LL; cycle = 1; current block = 0 */ > - log->l_tail_lsn = xlog_assign_lsn(1, 0); > - atomic64_set(&log->l_last_sync_lsn, xlog_assign_lsn(1, 0)); > + xlog_assign_atomic_lsn(&log->l_tail_lsn, 1, 0); > + xlog_assign_atomic_lsn(&log->l_last_sync_lsn, 1, 0); It might be worth to remove the rather pointless comment above. > BTOBB(XLOG_MAX_ICLOGS << (xfs_sb_version_haslogv2(&log->l_mp->m_sb) ? \ > XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT)) > > - > static inline xfs_lsn_t xlog_assign_lsn(uint cycle, uint block) spurious whitespace change From BATV+05f3ec64611280fa9bf8+2684+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 29 06:51:57 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBTCpvMa064481 for ; Wed, 29 Dec 2010 06:51:57 -0600 X-ASG-Debug-ID: 1293627240-04ef01590000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 07DBD1D01529 for ; Wed, 29 Dec 2010 04:54:00 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id EgoCCs7dQ72xzGrn for ; Wed, 29 Dec 2010 04:54:00 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PXvXU-00014I-Jc; Wed, 29 Dec 2010 12:54:00 +0000 Date: Wed, 29 Dec 2010 07:54:00 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH] xfs: use KM_NOFS for allocations during attribute list operations Subject: Re: [PATCH] xfs: use KM_NOFS for allocations during attribute list operations Message-ID: <20101229125400.GB1035@infradead.org> References: <1292892993-12424-1-git-send-email-david@fromorbit.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1292892993-12424-1-git-send-email-david@fromorbit.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1293627241 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, Dec 21, 2010 at 11:56:33AM +1100, Dave Chinner wrote: > From: Dave Chinner > > When listing attributes, we are doiing memory allocations under the > inode ilock using only KM_SLEEP. This allows memory allocation to > recurse back into the filesystem and do writeback, which may the > ilock we already hold on the current inode. THis will deadlock. > Hence use KM_NOFS for such allocations outside of transaction > context to ensure that reclaim recursion does not occur. > > Reported-by: Nick Piggin > Signed-off-by: Dave Chinner Looks good, Reviewed-by: Christoph Hellwig From BATV+05f3ec64611280fa9bf8+2684+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 29 06:54:47 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBTCslaY065052 for ; Wed, 29 Dec 2010 06:54:47 -0600 X-ASG-Debug-ID: 1293627410-79e702180000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id F06A91D0153D for ; Wed, 29 Dec 2010 04:56:50 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id 6MRekr9Ne7Xo7aVF for ; Wed, 29 Dec 2010 04:56:50 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PXvaE-0001iO-FU; Wed, 29 Dec 2010 12:56:50 +0000 Date: Wed, 29 Dec 2010 07:56:50 -0500 From: Christoph Hellwig To: Dave Chinner Cc: Christoph Hellwig , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: [PATCH 06/34] xfs: dynamic speculative EOF preallocation Subject: Re: [PATCH 06/34] xfs: dynamic speculative EOF preallocation Message-ID: <20101229125650.GC1035@infradead.org> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-7-git-send-email-david@fromorbit.com> <20101221151511.GA26127@infradead.org> <20101221214240.GB4907@dastard> <20101221234412.GC4907@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101221234412.GC4907@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1293627410 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean The xfstests patch looks good, Reviewed-by: Christoph Hellwig From BATV+05f3ec64611280fa9bf8+2684+infradead.org+hch@bombadil.srs.infradead.org Wed Dec 29 07:07:02 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_64 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBTD71WQ067289 for ; Wed, 29 Dec 2010 07:07:01 -0600 X-ASG-Debug-ID: 1293628145-7a2f02b20000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 84F401D017AC for ; Wed, 29 Dec 2010 05:09:05 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id mtxRgbTwy2XEYIVa for ; Wed, 29 Dec 2010 05:09:05 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PXvm3-0003cH-PL; Wed, 29 Dec 2010 13:09:03 +0000 Date: Wed, 29 Dec 2010 08:09:03 -0500 From: Christoph Hellwig To: Honza Fikar Cc: Eric Sandeen , xfs@oss.sgi.com X-ASG-Orig-Subj: Re: no rw xfs file systems in mtab: /proc/mounts Subject: Re: no rw xfs file systems in mtab: /proc/mounts Message-ID: <20101229130903.GD1035@infradead.org> References: <4D13648B.8000105@sandeen.net> <4D138457.8020008@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4D138457.8020008@gmail.com> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1293628145 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Can you please apply the debug patch below and see what output fsr gives with it? Index: xfsprogs-dev/fsr/xfs_fsr.c =================================================================== --- xfsprogs-dev.orig/fsr/xfs_fsr.c 2010-12-29 14:02:59.618003862 +0100 +++ xfsprogs-dev/fsr/xfs_fsr.c 2010-12-29 14:04:32.795004496 +0100 @@ -405,10 +405,16 @@ initallfs(char *mtab) while ((mp = getmntent(fp))) { int rw = 0; - if (strcmp(mp->mnt_type, MNTTYPE_XFS ) != 0 || - stat64(mp->mnt_fsname, &sb) == -1 || - !S_ISBLK(sb.st_mode)) + if (strcmp(mp->mnt_type, MNTTYPE_XFS ) != 0) continue; + if (stat64(mp->mnt_fsname, &sb) == -1) { + printf("fsr: cannot stat %s\n", mp->mnt_fsname); + continue; + } + if (!S_ISBLK(sb.st_mode)) { + printf("fsr: %s is not a block device\n", mp->mnt_fsname); + continue; + } cp = strtok(mp->mnt_opts,","); do { @@ -416,8 +422,7 @@ initallfs(char *mtab) rw++; } while ((cp = strtok(NULL, ",")) != NULL); if (rw == 0) { - if (dflag) - fsrprintf(_("Skipping %s: not mounted rw\n"), + printf(_("Skipping %s: not mounted rw\n"), mp->mnt_fsname); continue; } From aelder@sgi.com Wed Dec 29 09:48:24 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_65 autolearn=no version=3.4.0-r929098 Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBTFmOMr083802 for ; Wed, 29 Dec 2010 09:48:24 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay1.corp.sgi.com (Postfix) with ESMTP id 100AA8F8065; Wed, 29 Dec 2010 07:50:24 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 29 Dec 2010 09:49:24 -0600 Subject: Re: [PATCH 30/34] xfs: convert l_tail_lsn to an atomic variable. From: Alex Elder Reply-To: aelder@sgi.com To: Dave Chinner Cc: xfs@oss.sgi.com In-Reply-To: <1292916570-25015-31-git-send-email-david@fromorbit.com> References: <1292916570-25015-1-git-send-email-david@fromorbit.com> <1292916570-25015-31-git-send-email-david@fromorbit.com> Content-Type: text/plain; charset="UTF-8" Date: Wed, 29 Dec 2010 09:49:24 -0600 Message-ID: <1293637764.1961.44.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 29 Dec 2010 15:49:24.0897 (UTC) FILETIME=[F7B0F910:01CBA76F] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Tue, 2010-12-21 at 18:29 +1100, Dave Chinner wrote: > From: Dave Chinner > > log->l_tail_lsn is currently protected by the log grant lock. The > lock is only needed for serialising readers against writers, so we > don't really need the lock if we make the l_tail_lsn variable an > atomic. Converting the l_tail_lsn variable to an atomic64_t means we > can start to peel back the grant lock from various operations. > > Also, provide functions to safely crack an atomic LSN variable into > it's component pieces and to recombined the components into an > atomic variable. Use them where appropriate. > > This also removes the need for explicitly holding a spinlock to read > the l_tail_lsn on 32 bit platforms. > > Signed-off-by: Dave Chinner Looks good. A few things to consider, below. Reviewed by: Alex Elder > --- > fs/xfs/linux-2.6/xfs_trace.h | 2 +- > fs/xfs/xfs_log.c | 56 ++++++++++++++++++----------------------- > fs/xfs/xfs_log_priv.h | 37 +++++++++++++++++++++++---- > fs/xfs/xfs_log_recover.c | 14 ++++------ > 4 files changed, 63 insertions(+), 46 deletions(-) . . . > diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c > index 70790eb..d118bf8 100644 > --- a/fs/xfs/xfs_log.c > +++ b/fs/xfs/xfs_log.c . . . > @@ -2828,11 +2821,11 @@ xlog_state_release_iclog( > > if (iclog->ic_state == XLOG_STATE_WANT_SYNC) { > /* update tail before writing to iclog */ I personally don't like comments above local variable definitions. So I ask that you rearrange this. > - xlog_assign_tail_lsn(log->l_mp); > + xfs_lsn_t tail_lsn = xlog_assign_tail_lsn(log->l_mp); Insert a blank line here too. > sync++; > iclog->ic_state = XLOG_STATE_SYNCING; > - iclog->ic_header.h_tail_lsn = cpu_to_be64(log->l_tail_lsn); > - xlog_verify_tail_lsn(log, iclog, log->l_tail_lsn); > + iclog->ic_header.h_tail_lsn = cpu_to_be64(tail_lsn); > + xlog_verify_tail_lsn(log, iclog, tail_lsn); > /* cycle incremented when incrementing curr_block */ > } > spin_unlock(&log->l_icloglock); . . . > @@ -3445,9 +3438,10 @@ xlog_verify_grant_tail( > * check the byte count. > */ Do you suppose the compiler optimizes all of the following out with a non-debug build? If not maybe it could be put into a debug-only helper function. > xlog_crack_grant_head(&log->l_grant_write_head, &cycle, &space); > - if (CYCLE_LSN(tail_lsn) != cycle) { > - ASSERT(cycle - 1 == CYCLE_LSN(tail_lsn)); > - ASSERT(space <= BBTOB(BLOCK_LSN(tail_lsn))); > + xlog_crack_atomic_lsn(&log->l_tail_lsn, &tail_cycle, &tail_blocks); > + if (tail_cycle != cycle) { > + ASSERT(cycle - 1 == tail_cycle); > + ASSERT(space <= BBTOB(tail_blocks)); > } > } > > diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h > index 958f356..d34af1c 100644 > --- a/fs/xfs/xfs_log_priv.h > +++ b/fs/xfs/xfs_log_priv.h > @@ -53,7 +53,6 @@ struct xfs_mount; > BTOBB(XLOG_MAX_ICLOGS << (xfs_sb_version_haslogv2(&log->l_mp->m_sb) ? \ > XLOG_MAX_RECORD_BSHIFT : XLOG_BIG_RECORD_BSHIFT)) > > - Kill this hunk. > static inline xfs_lsn_t xlog_assign_lsn(uint cycle, uint block) > { > return ((xfs_lsn_t)cycle << 32) | block; . . . > @@ -566,6 +566,31 @@ int xlog_write(struct log *log, struct xfs_log_vec *log_vector, > xlog_in_core_t **commit_iclog, uint flags); > > /* > + * When we crack an atomic LSN, we sample it first so that the value will not > + * change while we are cracking it into the component values. This means we > + * will always get consistent component values to work from. This should always > + * be used to smaple and crack LSNs taht are stored and updated in atomic sample that > + * variables. > + */ > +static inline void > +xlog_crack_atomic_lsn(atomic64_t *lsn, uint *cycle, uint *block) . . . From aelder@sgi.com Wed Dec 29 10:27:38 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBTGRcOa089216 for ; Wed, 29 Dec 2010 10:27:38 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id CC88BAC00D; Wed, 29 Dec 2010 08:29:38 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 29 Dec 2010 10:29:38 -0600 Subject: Re: [PATCH 5/5] percpu_counter: only disable preemption if needed in add_unless_lt() From: Alex Elder Reply-To: aelder@sgi.com To: Dave Chinner Cc: xfs@oss.sgi.com In-Reply-To: <20101223063138.GF18264@dastard> References: <1293076602.2408.434.camel@doink> <20101223063138.GF18264@dastard> Content-Type: text/plain; charset="UTF-8" Date: Wed, 29 Dec 2010 10:29:38 -0600 Message-ID: <1293640178.1961.62.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 29 Dec 2010 16:29:38.0428 (UTC) FILETIME=[964493C0:01CBA775] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, 2010-12-23 at 17:31 +1100, Dave Chinner wrote: > On Wed, Dec 22, 2010 at 09:56:42PM -0600, Alex Elder wrote: > > In __percpu_counter_add_unless_lt() we don't need to disable > > preemption unless we're manipulating a per-cpu variable. That only > > happens in a limited case, so narrow the scope of that preemption to > > surround that case. This makes the "out" label rather unnecessary, > > so replace a couple "goto out" calls to just return. . . . > > Regardless of the other changes, this is not valid. That is: You're right. I was thinking about updates to fbc->count being protected by the spinlock, but that doesn't address the cached value getting stale if this CPU gets preempted and another thread passes through this code before the first one gets resumed. I'm also looking at the other patches and your responses and will be done with it today. I don't want to hold up your pull request any longer. If you found anything of value in the little series I posted feel free to incorporate it into your own changes. -Alex > amount = -1; > count = fbc->count; > ..... > > > > count (i.e > lots more than error will catch), so the current value of > count in this context is wrong and cannot be trusted> > > > > if (count - error + amount > threshold) { > on a stale count value> > > .... > } > > Effectively, if we want to be able to use lockless optimisations, we > need to ensure that the value of the global counter that we read > remains within the given error bounds until we have finished making > the lockless modification. That is done via disabling preemption > across the entire function... > > Cheers, > > Dave. From aelder@sgi.com Wed Dec 29 14:54:06 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBTKs5u5123040 for ; Wed, 29 Dec 2010 14:54:06 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id D9590AC005; Wed, 29 Dec 2010 12:56:06 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 29 Dec 2010 14:56:06 -0600 Subject: Re: [PATCH 2/5] percpu_counter: avoid potential underflow in add_unless_lt From: Alex Elder Reply-To: aelder@sgi.com To: Dave Chinner Cc: XFS Mailing List In-Reply-To: <20101223063957.GG18264@dastard> References: <1293076587.2408.431.camel@doink> <20101223063957.GG18264@dastard> Content-Type: text/plain; charset="UTF-8" Date: Wed, 29 Dec 2010 14:56:05 -0600 Message-ID: <1293656165.1961.469.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 29 Dec 2010 20:56:06.0163 (UTC) FILETIME=[CFB35630:01CBA79A] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, 2010-12-23 at 17:39 +1100, Dave Chinner wrote: > On Wed, Dec 22, 2010 at 09:56:27PM -0600, Alex Elder wrote: > > In __percpu_counter_add_unless_lt(), an assumption is made that > > under certain conditions it's possible to determine that an amount > > can be safely added to a counter, possibly without having to acquire > > the lock. This assumption is not valid, however. > > > > These lines encode the assumption: > > if (count + amount > threshold + error) { > > __percpu_counter_add(fbc, amount, batch); > > > > Inside __percpu_counter_add(), the addition is performed > > without acquiring the lock if the *sum* of the batch size > > and the CPU-local delta is within the batch size. Otherwise > > it does the addition after acquiring the lock. > > > > The problem is that *that* sum may actually end up being greater > > than the batch size, forcing the addition to be performed under > > protection of the lock. And by the time the lock is acquired, the > > value of fbc->count may have been updated such that adding the given > > amount allows the result to go negative. > > > > Fix this by open-coding the portion of the __percpu_counter_add() > > that avoids the lock. > > > > Signed-off-by: Alex Elder > > > > --- > > lib/percpu_counter.c | 11 ++++++++--- > > 1 file changed, 8 insertions(+), 3 deletions(-) > > > > Index: b/lib/percpu_counter.c > > =================================================================== > > --- a/lib/percpu_counter.c > > +++ b/lib/percpu_counter.c > > @@ -243,9 +243,14 @@ int __percpu_counter_add_unless_lt(struc > > * we can safely add, and might be able to avoid locking. > > */ > > if (count + amount > threshold + error) { > > - __percpu_counter_add(fbc, amount, batch); > > - ret = 1; > > - goto out; > > + s32 *pcount = this_cpu_ptr(fbc->counters); > > + > > + count = *pcount + amount; > > + if (abs(count) < batch) { > > + *pcount = count; > > + ret = 1; > > + goto out; > > + } > > } > > The problem with this is that it never zeros pcount. That means > after a bunch of increments or decrements, abs(*pcount) == 31, > and ever further increment/decrement will drop through to the path > that requires locking. Then we simply have a very expensive global > counter. I see what you mean. Perhaps the code (below this) that acquires the lock should zero *pcount while it's updating fbc->count. It's already paying the price of the lock anyway, might as well get the most value out of doing so. Anyway, I have stuff of greater significance in the next note... > We need to take the lock to zero the pcount value because it has to > be added to fbc->count. i.e. if you want this path to remain mostly > lockless, then it needs to do exactly what __percpu_counter_add() > does.... > > Cheers, > > Dave. From aelder@sgi.com Wed Dec 29 14:54:28 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBTKsSOv123066 for ; Wed, 29 Dec 2010 14:54:28 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay2.corp.sgi.com (Postfix) with ESMTP id 3A542304039; Wed, 29 Dec 2010 12:56:28 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 29 Dec 2010 14:56:28 -0600 Subject: Re: [PATCH 1/5] percpu_counter: fix test in __percpu_counter_add_unless_lt() From: Alex Elder Reply-To: aelder@sgi.com To: Dave Chinner Cc: XFS Mailing List In-Reply-To: <20101223060652.GE18264@dastard> References: <1293076575.2408.425.camel@doink> <20101223060652.GE18264@dastard> Content-Type: text/plain; charset="UTF-8" Date: Wed, 29 Dec 2010 14:56:28 -0600 Message-ID: <1293656188.1961.470.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 29 Dec 2010 20:56:28.0741 (UTC) FILETIME=[DD287750:01CBA79A] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, 2010-12-23 at 17:06 +1100, Dave Chinner wrote: > On Wed, Dec 22, 2010 at 09:56:15PM -0600, Alex Elder wrote: > > In __percpu_counter_add_unless_lt(), there is a test to see if > > a call to __percpu_counter_add() can be made, knowing the result > > will not be less than the given threshhold and the called function > > will do the addition without taking a lock. . . . > > =================================================================== > > --- a/lib/percpu_counter.c > > +++ b/lib/percpu_counter.c > > @@ -239,10 +239,10 @@ int __percpu_counter_add_unless_lt(struc > > goto out; > > > > /* > > - * If the counter is over the threshold and the change is less than the > > - * batch size, we might be able to avoid locking. > > + * If the updated counter will be over the threshold we know > > + * we can safely add, and might be able to avoid locking. > > */ > > - if (count > threshold + error && abs(amount) < batch) { > > + if (count + amount > threshold + error) { > > __percpu_counter_add(fbc, amount, batch); > > ret = 1; > > goto out; > > What you have is what I first implemented following your exact > logic. However, after having several assert failures n the XFS code, > I realised that the logic fails when there are concurrent modifications > with abs(amount) > batch. To demonstrate, take the initial conditions: I think we're both wrong. First I'll point out a think-o you did, then I'll lay out a counterexample to your approach. > threshold = 0 > amount = -39 (for ease of maths) > batch = 32 > error = 256 (2 * 32 * 4 cpus) > > with the per CPU counter values: > > fbc->count = 296 > > CPU 0 1 2 3 > value -31 -31 -31 -31 > > And the start the concurrent modification such that every racing CPU > sees fbc->count = 296 at their initial sample. All evaluate it as: > > count = 296 > if (296 - 39 > 0 + 256) { > > and so take the __percpu_counter_add() path. Assuming CPUs 1-3 > complete before CPU 0, the counter changes value like: > > > cpu 1 pcp_cnt_add_lt(-39) > CPU 0 1 2 3 > value -31 0 -31 -31 > fbc->count = 216 No. fbc->count + *pcount + amount = 296 + (-31) + (-39) = 226. You're mis-computing (*pcount + amount), which is -70, not -80. > cpu 2 pcp_cnt_add_lt(-39) > CPU 0 1 2 3 > value -31 0 0 -31 > fbc->count = 136 fbc->count = 156 > cpu 3 pcp_cnt_add_lt(-39) > CPU 0 1 2 3 > value -31 0 0 0 > fbc->count = 56 fbc->count = 86 > And the we run the counter add on CPU 0: > > __percpu_counter_add(fbc, -39, 32); > > CPU 0 1 2 3 > value 0 0 0 0 > fbc->count = -24 fbc->count = 16, so all is well. > And we've just blown through the threshold. We modified the counter > and pushed the result less than the threshold which we are not > supposed to be, and worst yet is the fact we returning a positive > number indicating that we _didn't_ bust the threshold. Now here's an example that will fail with your version, which is: if (count > threshold + error && abs(amount) < batch) { __percpu_counter_add(fbc, amount, batch); My example is not symmetric like yours is. threshold = 0 batch = 32 4 cpus, so (your) error = 2 * 4 * 32 = 256 We'll start with 0 for all per-cpu counter values for simplicity, but we'll not assume that the amount being added by all CPU's is the same. So here are both the current per-cpu counter values and the amount each racing CPU is going to try to add. fbc->count = 257 CPU 0 1 2 3 value 0 0 0 0 amount -31 -76 -76 -76 As in your example, all CPU's enter at the same time and start with the same initial value from fbc->count, 257. First, CPU 0 checks the condition and finds it holds: if (count > threshold + error && abs(amount) < batch) { 257 > 0 + 256 && abs(-31) < 32 Now, before CPU 0 gets its chance to call __percpu_counter_add(), CPU's 1, 2, and 3 reach this point, find the condition does not hold, and proceed with adding their values to fbc->count under lock. Net result is: (-76 * 3 = -228; 257 - 228 = 29) fbc->count = 29 CPU 0 1 2 3 value 0 0 0 0 amount -31 (done) (done) (done) Now CPU 0 proceeds with its __percpu_counter_add(), and inside that it finds that *pcount + amount = -31, which is < batch and > -batch, so it simply records the result in the local "delta" counter for CPU 0. Net result: fbc->count = 29 CPU 0 1 2 3 value -31 0 0 0 amount (done) (done) (done) (done) So although the test made it seem OK to add the value, the "net" result has gone negative. I.e, percpu_counter_sum() would produce -2. The whole point of these bounds checking things is to ensure the net value (not just fbc->count) of the counter stays above the threshold. The same problem exists if the amount being added on CPU 0 was -76 like the others. The add would be done under lock, but the result would still go below the threshold. Your approach embeds in it an assumption that "amount" will be within a certain range across all CPU's--specifically, less than the batch size (I think). The real problem is that we're caching the value of fbc->count, and as soon as we've done that it could be out of date. To get around it we need to examine it under lock--preferably a reader/writer lock I suppose. You'll notice that fbc->count is only ever read under the protection of the spinlock everywhere else in the file. Locking is avoided only when checking whether it is possible to add to a per-cpu value, and that is done with preemption disabled. It may be that the only way around this is to compute the accurate sum except in the simple case where we know that the maximum possible net value of the counter will produce a too-low value when the amount is added. Otherwise you have to compute the sum under lock, and then complete the assignment only if the threshold condition is met. I think that--unless you impose a range bound on "amount"--you can't escape the fact that other CPU's can screw up the result by updating fbc->count after you've sampled it. I have a little more below. > Analysis of the failures lead me to this lead me to this logic > for the unlocked check in my proposed patch: > > We can do unlocked modifications concurrently on all CPUs IFF > > 1. the code cannot be preempted between sampling fbc->count > and calling __percpu_counter_add() This I agree with (you convinced me in your response to my patch 5/5). > 2. -batch < amount < batch This isn't right, or maybe just isn't relevant. The reason is that it neither takes into account this CPU's counter value, nor what a concurrent call on the other CPU's might be adding to the net value. > 3. the error bound is set to 2 * batch * nr_cpus I think this assumes that all the CPU's are adding a limited amount to the counter. And I still think you're doubling the error bound unnecessarily (but that may reflect the implied limit). Below I have a version of the code that I think would work, but it unfortunately requires a lock in the (presumably) normal case. > To demonstrate the worst case initial conditions, but being bound by > the above rules: . . . -Alex int __percpu_counter_add_unless_lt( struct percpu_counter *fbc, s64 amount, s64 threshold, s32 batch) { s64 error = batch * num_online_cpus(); s64 new_count; int cpu; int ret = -1; /* * The maximum value the counter holds is bounded by its * current count plus the error magnitude computed above. * If that plus the amount to be added is less than the * threshold, we can't do the add because the result would * be too low. */ if (percpu_counter_read(fbc) + error + amount < threshold) return -1; /* * Otherwise, compute the accurate sum. If and adding the * given amount doesn't exceed the threshold, add it. In * that case, just add the amount to the global counter. */ spin_lock(&fbc->lock); new_count = fbc->count + amount; for_each_online_cpu(cpu) { s32 *pcount = per_cpu_ptr(fbc->counters, cpu); new_count += *pcount; } if (new_count >= threshold) { ret = new_count > threshold; fbc->count = fbc_count + amount; } spin_unlock(&fbc->lock); return ret; } From aelder@sgi.com Wed Dec 29 15:47:20 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBTLlKBh131643 for ; Wed, 29 Dec 2010 15:47:20 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id 1B885AC008; Wed, 29 Dec 2010 13:49:20 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Wed, 29 Dec 2010 15:49:20 -0600 Subject: Re: [PATCH 1/5] percpu_counter: fix test in __percpu_counter_add_unless_lt() From: Alex Elder Reply-To: aelder@sgi.com To: Dave Chinner Cc: XFS Mailing List In-Reply-To: <1293656188.1961.470.camel@doink> References: <1293076575.2408.425.camel@doink> <20101223060652.GE18264@dastard> <1293656188.1961.470.camel@doink> Content-Type: text/plain; charset="UTF-8" Date: Wed, 29 Dec 2010 15:49:20 -0600 Message-ID: <1293659360.1961.474.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 29 Dec 2010 21:49:20.0699 (UTC) FILETIME=[3FCAD8B0:01CBA7A2] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, 2010-12-29 at 14:56 -0600, Alex Elder wrote: > if (new_count >= threshold) { > ret = new_count > threshold; > fbc->count = fbc_count + amount; > } > spin_unlock(&fbc->lock); > > return ret; > } I obviously didn't test the code I sent, but you get what I mean... Here is the way one of the lines above should look: fbc->count = fbc->count + amount; Or even better: fbc->count += amount; -Alex From BATV+34dcfc6113cf705b5c2c+2685+infradead.org+hch@bombadil.srs.infradead.org Thu Dec 30 05:39:30 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUBdRv3240569 for ; Thu, 30 Dec 2010 05:39:30 -0600 X-ASG-Debug-ID: 1293709291-3cf503a30000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from bombadil.infradead.org (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 3D9F211072BC for ; Thu, 30 Dec 2010 03:41:31 -0800 (PST) Received: from bombadil.infradead.org (bombadil.infradead.org [18.85.46.34]) by cuda.sgi.com with ESMTP id DTiSnRqkK02p6XWQ for ; Thu, 30 Dec 2010 03:41:31 -0800 (PST) X-ASG-Whitelist: Client Received: from hch by bombadil.infradead.org with local (Exim 4.72 #1 (Red Hat Linux)) id 1PYGsr-0001t0-CT; Thu, 30 Dec 2010 11:41:29 +0000 Date: Thu, 30 Dec 2010 06:41:29 -0500 From: Christoph Hellwig To: Dave Chinner Cc: xfs@oss.sgi.com, Lukas Czerner X-ASG-Orig-Subj: Re: xfs: add FITRIM support Subject: Re: xfs: add FITRIM support Message-ID: <20101230114129.GA4321@infradead.org> References: <20101125112304.GA4195@infradead.org> <20101223014409.GL4907@dastard> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101223014409.GL4907@dastard> User-Agent: Mutt/1.5.21 (2010-09-15) X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org See http://www.infradead.org/rpr.html X-Barracuda-Connect: bombadil.infradead.org[18.85.46.34] X-Barracuda-Start-Time: 1293709292 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 23, 2010 at 12:44:09PM +1100, Dave Chinner wrote: > Hmmmm - if we are given a range to trim, wouldn't we do better to > walk the by-bno btree instead? i.e, we have two different cases > here - trim an entire AG, and trim part of an AG given by {start, end}. > > We only need these range checks on the AGs that are only partially > trimmed, and it would seem more efficient to me to walk the by-bno > tree for those rather than walk the by-size tree trying to find > range matches. It might be, but I'm not sure it's really worth the complexity. I can't really find any good use case for a partially trim anyway. Ccing Lukas to figure out what his intent with this was. > Hmmm - so we hold the agf locked for the entire trim? That's a bit > ugly. Given this is best effort, we could avoid this by changing it > to something like: > > longest = 0; > do { > lock agf > force log > if (!longest) > longest = agf->longest > init cursor > do { > xfs_alloc_lookup_le(longest) > alloc_get_rec(&fbno, &flen) > check flen > busy search > discard > decrement cursor > } while (flen == longest) > destroy cursor > unlock agf > longest = flen; > } while(1) This doesn't seem overly efficient. Unless we have lots of extents with same size we keep having to allocate new cursors all the time. I'm not too worried about busy systems - FITRIM is explicitly called and we should expect admins not to call it during the most busy time of the day. And even in it's current form it's already much better than wiper.sh in that respect. I think adding a periodical break using a modified scheme is fine, but I'd really like to get the code out into some more testers hands for now. From ajeet.yadav.77@gmail.com Thu Dec 30 06:26:35 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,FREEMAIL_FROM, HTML_MESSAGE,T_DKIM_INVALID,T_TO_NO_BRKTS_FREEMAIL autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUCQYuK242784 for ; Thu, 30 Dec 2010 06:26:35 -0600 X-ASG-Debug-ID: 1293712117-63f102f40000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-qw0-f53.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id D092515351D2 for ; Thu, 30 Dec 2010 04:28:37 -0800 (PST) Received: from mail-qw0-f53.google.com (mail-qw0-f53.google.com [209.85.216.53]) by cuda.sgi.com with ESMTP id Hb9W33PcCOjvGrGs for ; Thu, 30 Dec 2010 04:28:37 -0800 (PST) Received: by qwe5 with SMTP id 5so12243814qwe.26 for ; Thu, 30 Dec 2010 04:28:36 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:date:message-id :subject:from:to:content-type; bh=zyx88CEHdWnyZb+Mb+IqBv1ux+NpHKvF38cp6e4PK1c=; b=LEsaAWkA6AnXhRUsM31k8ZxVRBVoJEdXjLa/0eHrcztc/edjSCbVgEdjzxoF+ynedg 9U/XLPgEJ2KVFLPdcK2orK+kIoihAvWoG7H5bpEyyRHSUXYRMRB1s4Wy58y6nZLb6pBB EqircbVwjiN8SBR8Wp65xFmVXc3OZ9Drs1hfY= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:date:message-id:subject:from:to:content-type; b=k2uX+jcmHzship9sKP3pRr9PUMVlSNt30edPc9bFQx9amCMY7s9GwqAiIyBjPtFfDN JqWZ7lPSwRZZSt85ss/b68r/iIa5rgg9e7QitddfID6VyeGy4+ZNvbxVhw0w8B5h1Ggh owvxOT2UPxPAmACkWn4bcBdTv6t9XqvgTunrw= MIME-Version: 1.0 Received: by 10.224.61.6 with SMTP id r6mr15430005qah.104.1293712116605; Thu, 30 Dec 2010 04:28:36 -0800 (PST) Received: by 10.220.165.198 with HTTP; Thu, 30 Dec 2010 04:28:36 -0800 (PST) Date: Thu, 30 Dec 2010 17:58:36 +0530 Message-ID: X-ASG-Orig-Subj: XFS handling of synchronous buffers in case of EIO error Subject: XFS handling of synchronous buffers in case of EIO error From: Ajeet Yadav To: xfs@oss.sgi.com Content-Type: multipart/alternative; boundary=0015175cded426e1c604989fd31a X-Barracuda-Connect: mail-qw0-f53.google.com[209.85.216.53] X-Barracuda-Start-Time: 1293712117 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -1.52 X-Barracuda-Spam-Status: No, SCORE=-1.52 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_RULE7568M, DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50925 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message 0.50 BSF_RULE7568M Custom Rule 7568M X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --0015175cded426e1c604989fd31a Content-Type: text/plain; charset=ISO-8859-1 Kernel: 2.6.30.9 I am trouble shooting a hang in XFS during umount. Test scenerio: Copy large number of files files using below script, and remove the USB after 3-5 second index=0 while [ "$?" == 0 ] do index=$((index+1)) sync cp $1/1KB.txt $2/"$index".test done In rare scenerio during USB unplug the umount process hang at xfs_buf_lock. Below log shows the hung process We have put printk to buffer handling functions xfs_buf_iodone_callbacks(), xfs_buf_error_relse(), xfs_buf_relse() and xfs_buf_rele() We always observed the hang only comes when bp->b_relse = xfs_buf_error_relse(). i.e when xfs_buf_iodone_callbacks() execute XFS_BUF_SET_BRELSE_FUNC(bp,xfs_buf_error_relse); XFS_BUF_DONE(bp); XFS_BUF_FINISH_IOWAIT(bp); buf its never called by xfs_buf_relse() because b_hold = 3. Also we have seen that this problem always comes when bp->relse != NULL && bp->hold > 1. I do not know whether below prints will help you, but I have taken printk for super block buffer tracing S-functionname ( Start of function) E-functionname (End of function) I think the problem is related to xfs_buf_iodone_callbacks synchronous buffer error handling path and release buffer. ------------------------------------------------ buf_lock (Here buffer lock success, taken after down()) S-xfs_buf_rele - 3 (Start of xfs_buf_rele(), b_hold = 3) Call Trace: [<8032c1bc>] dump_stack+0x8/0x34 from[<801cab2c>] xfs_buf_rele+0xc8/0x28c [<801cab2c>] xfs_buf_rele+0xc8/0x28c from[<801cad9c>] xfs_buf_delwri_dequeue+0xac/0x13c [<801cad9c>] xfs_buf_delwri_dequeue+0xac/0x13c from[<801cb798>] xfs_bwrite+0x5c/0x128 [<801cb798>] xfs_bwrite+0x5c/0x128 from[<801d5b48>] xfs_sync_fsdata+0xbc/0x17c [<801d5b48>] xfs_sync_fsdata+0xbc/0x17c from[<801d690c>] xfs_quiesce_data+0x34/0x68 [<801d690c>] xfs_quiesce_data+0x34/0x68 from[<801d2b34>] xfs_fs_sync_fs+0x30/0xec [<801d2b34>] xfs_fs_sync_fs+0x30/0xec<7>hub 2-0:1.0: state 7 ports 1 chg 0000 evt 0002 usb 2-1: USB disconnect, address 3 from[<800b7ff0>] sync_filesystems+0x118/0x19c [<800b7ff0>] sync_filesystems+0x118/0x19c from[<800db490>] do_sync+0x38/0x7c [<800db490>] do_sync+0x38/0x7c from[<800db510>] sys_sync+0x10/0x20 [<800db510>] sys_sync+0x10/0x20 from[<8000ff44>] stack_done+0x20/0x3c E-xfs_buf_rele (End of function) S-xfs_bdstrat_cb S-xfs_buf_rele - 3 S-xfs_buf_iodone_callbacks Device sda2, XFS metadata write error block 0x0 in sda2 E-xfs_buf_iodone_callbacks Call Trace: [<8032c1bc>] dump_stack+0x8/0x34 from[<801cab2c>] xfs_buf_rele+0xc8/0x28c [<801cab2c>] xfs_buf_rele+0xc8/0x28c from[<801cb2fc>] xfs_buf_iorequest+0xe8/0x104 [<801cb2fc>] xfs_buf_iorequest+0xe8/0x104 from[<801cbd2c>] xfs_bdstrat_cb+0x140/0x178 [<801cbd2c>] xfs_bdstrat_cb+0x140/0x178 from[<801cb7ac>] xfs_bwrite+0x70/0x128 [<801cb7ac>] xfs_bwrite+0x70/0x128 from[<801d5b48>] xfs_sync_fsdata+0xbc/0x17c [<801d5b48>] xfs_sync_fsdata+0xbc/0x17c from[<801d690c>] xfs_quiesce_data+0x34/0x68 [<801d690c>] xfs_quiesce_data+0x34/0x68 from[<801d2b34>] xfs_fs_sync_fs+0x30/0xec [<801d2b34>] xfs_fs_sync_fs+0x30/0xec from[<800b7ff0>] sync_filesystems+0x118/0x19c [<800b7ff0>] sync_filesystems+0x118/0x19c from[<800db490>] do_sync+0x38/0x7c [<800db490>] do_sync+0x38/0x7c from[<800db510>] sys_sync+0x10/0x20 [<800db510>] sys_sync+0x10/0x20 from[<8000ff44>] stack_done+0x20/0x3c E-xfs_buf_rele E-xfs_bdstrat_cb xfs_force_shutdown(sda2,0x1) called from line 1020 of file fs/xfs/linux-2.6/xfs_buf.c. Return address = 0x801cb7f0 Filesystem "sda2": I/O Error Detected. Shutting down filesystem: sda2 Please umount the filesystem, and rectify the problem(s) S-xfs_buf_relse S-xfs_buf_rele - 2 Call Trace: [<8032c1bc>] dump_stack+0x8/0x34 from[<801cab2c>] xfs_buf_rele+0xc8/0x28c [<801cab2c>] xfs_buf_rele+0xc8/0x28c from[<801cb828>] xfs_bwrite+0xec/0x128 [<801cb828>] xfs_bwrite+0xec/0x128 from[<801d5b48>] xfs_sync_fsdata+0xbc/0x17c [<801d5b48>] xfs_sync_fsdata+0xbc/0x17c from[<801d690c>] xfs_quiesce_data+0x34/0x68 [<801d690c>] xfs_quiesce_data+0x34/0x68 from[<801d2b34>] xfs_fs_sync_fs+0x30/0xec [<801d2b34>] xfs_fs_sync_fs+0x30/0xec from[<800b7ff0>] sync_filesystems+0x118/0x19c [<800b7ff0>] sync_filesystems+0x118/0x19c from[<800db490>] do_sync+0x38/0x7c [<800db490>] do_sync+0x38/0x7c from[<800db510>] sys_sync+0x10/0x20 [<800db510>] sys_sync+0x10/0x20 from[<8000ff44>] stack_done+0x20/0x3c E-xfs_buf_rele E-xfs_buf_relse cp: cannot stat '/dtv/usb/sda2/6.test': Input/output error Filesystem "sda2": xfs_log_force: error 5 returned. INFO: task khubd:56 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. khubd D [86a516a8] 8032cb2c 0 56 2 237 26 (kernel thread) Stack : 00000000 801a2a6c 8643ebe0 86b43a8c 86a51830 8032cb2c 7fffffff 86a516a8 00000002 00000001 86b6dc00 80243a10 e0364448 8032c344 e0373f10 8032cb2c 00000087 0000000b 86b43ab8 801d61bc 3b9aca00 8032d16c 00000008 8019f0dc 86b43a88 00008000 8643ebe0 8616d900 0000000b 00000000 00000000 86bae000 86b43b08 801d62e0 7fffffff 86a516a8 00000002 8032e374 00000000 8008fae4 ... Call Trace: [<8032ca74>] __schedule+0x618/0x6b8 from[<8032cb2c>] schedule+0x18/0x3c [<8032cb2c>] schedule+0x18/0x3c from[<8032d16c>] schedule_timeout+0x2c/0x1c0 [<8032d16c>] schedule_timeout+0x2c/0x1c0 from[<8032e374>] __down+0x8c/0xdc [<8032e374>] __down+0x8c/0xdc from[<8004500c>] down+0x40/0x88 [<8004500c>] down+0x40/0x88 from[<801c9c10>] xfs_buf_lock+0xcc/0x178 [<801c9c10>] xfs_buf_lock+0xcc/0x178 from[<801b6550>] xfs_getsb+0x38/0x54 [<801b6550>] xfs_getsb+0x38/0x54 from[<801d5b00>] xfs_sync_fsdata+0x74/0x17c [<801d5b00>] xfs_sync_fsdata+0x74/0x17c from[<801d690c>] xfs_quiesce_data+0x34/0x68 [<801d690c>] xfs_quiesce_data+0x34/0x68 from[<801d2b34>] xfs_fs_sync_fs+0x30/0xec [<801d2b34>] xfs_fs_sync_fs+0x30/0xec from[<800b878c>] __fsync_super+0xa4/0xc8 [<800b878c>] __fsync_super+0xa4/0xc8 from[<800b87c4>] fsync_super+0x14/0x28 [<800b87c4>] fsync_super+0x14/0x28 from[<800e5cc4>] fsync_bdev+0x28/0x64 [<800e5cc4>] fsync_bdev+0x28/0x64 from[<801faaa8>] invalidate_partition+0x28/0x60 [<801faaa8>] invalidate_partition+0x28/0x60 from[<801001b0>] del_gendisk+0x40/0xf0 [<801001b0>] del_gendisk+0x40/0xf0 from[<8025cb50>] sd_remove+0x40/0xc8 [<8025cb50>] sd_remove+0x40/0xc8 from[<80259b5c>] scsi_bus_remove+0x44/0x5c [<80259b5c>] scsi_bus_remove+0x44/0x5c from[<802463d4>] __device_release_driver+0x80/0xbc [<802463d4>] __device_release_driver+0x80/0xbc from[<80246540>] device_release_driver+0x28/0x40 [<80246540>] device_release_driver+0x28/0x40 from[<802457b8>] bus_remove_device+0xb0/0xf0 [<802457b8>] bus_remove_device+0xb0/0xf0 from[<80243b30>] device_del+0x120/0x1a8 [<80243b30>] device_del+0x120/0x1a8 from[<80259f50>] __scsi_remove_device+0x40/0x98 [<80259f50>] __scsi_remove_device+0x40/0x98 from[<802569cc>] scsi_forget_host+0x88/0xfc [<802569cc>] scsi_forget_host+0x88/0xfc from[<8024f34c>] scsi_remove_host+0xf8/0x1ac [<8024f34c>] scsi_remove_host+0xf8/0x1ac from[] quiesce_and_remove_host+0x9c/0x12c [usb_storage] [] quiesce_and_remove_host+0x9c/0x12c [usb_storage] from[] usb_stor_disconnect+0x20/0x3c [usb_storage] [] usb_stor_disconnect+0x20/0x3c [usb_storage] from[] usb_unbind_interface+0x68/0x128 [usbcore] [] usb_unbind_interface+0x68/0x128 [usbcore] from[<802463d4>] __device_release_driver+0x80/0xbc [<802463d4>] __device_release_driver+0x80/0xbc from[<80246540>] device_release_driver+0x28/0x40 [<80246540>] device_release_driver+0x28/0x40 from[<802457b8>] bus_remove_device+0xb0/0xf0 [<802457b8>] bus_remove_device+0xb0/0xf0 from[<80243b30>] device_del+0x120/0x1a8 [<80243b30>] device_del+0x120/0x1a8 from[] usb_disable_device+0x14c/0x234 [usbcore] [] usb_disable_device+0x14c/0x234 [usbcore] from[] usb_disconnect+0x170/0x37c [usbcore] [] usb_disconnect+0x170/0x37c [usbcore] from[] hub_thread+0x85c/0x18f8 [usbcore] [] hub_thread+0x85c/0x18f8 [usbcore] from[<8003ff3c>] kthread+0x5c/0xa0 [<8003ff3c>] kthread+0x5c/0xa0 from[<80008908>] kernel_thread_helper+0x10/0x18 ------------------------------------------------------------------------------------- INFO: task usb_mount:395 blocked for more than 120 seconds. "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. usb_mount D [86163ae8] 8032cb2c 0 395 371 (user thread) Stack : ffffff9c 86b71ef0 00400ae0 800c0150 86163c70 8032cb2c 86163ae8 00000002 86bbbf18 86bbbf00 00000000 00000000 86b71f00 86b71ef8 7f8b0670 8032cb2c 86bbb780 800b2510 00000001 86bbbf00 86bbbf00 8032f024 86bbbf00 800b21c0 86bbbf00 86bbbf00 86b6dc44 86b6dc44 86163ae8 00000002 86b6dc00 86b6dc00 803fe190 800b9350 86bbbf00 86bbbf18 86bbbef8 86bbbf00 86bbbef8 86bbbef8 ... Call Trace: [<8032ca74>] __schedule+0x618/0x6b8 from[<8032cb2c>] schedule+0x18/0x3c [<8032cb2c>] schedule+0x18/0x3c from[<8032f024>] __down_write_nested+0x104/0x128 [<8032f024>] __down_write_nested+0x104/0x128 from[<800b9350>] deactivate_super+0x70/0x110 [<800b9350>] deactivate_super+0x70/0x110 from[<800d122c>] sys_umount+0x310/0x358 [<800d122c>] sys_umount+0x310/0x358 from[<8000ff44>] stack_done+0x20/0x3c ------------------------------------------------------------------------------------- Filesystem "sda2": xfs_log_force: error 5 returned. --0015175cded426e1c604989fd31a Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Kernel: 2.6.30.9
=A0
I am trouble shooting a hang in XFS during umount.
Test scenerio: Copy large number of files files using below script, an= d remove the USB after 3-5 second
=A0
index=3D0
while [ "$?" =3D=3D 0 ]
do
=A0=A0=A0=A0= =A0=A0=A0 index=3D$((index+1))
=A0=A0=A0=A0=A0=A0=A0 sync
=A0=A0=A0= =A0=A0=A0=A0 cp $1/1KB.txt $2/"$index".test
done
=A0
In rare scenerio during USB unplug the umount process hang at xfs_buf_= lock. Below log shows the hung process
=A0
We have put printk to buffer handling functions xfs_buf_iodone_callbac= ks(), xfs_buf_error_relse(), xfs_buf_relse() and xfs_buf_rele()
=A0
We always observed the hang only comes when bp->b_relse =3D xfs_buf= _error_relse(). i.e when xfs_buf_iodone_callbacks() execute=A0
XFS_BUF_SET_BRELSE_FUNC(bp,xfs_buf_error_relse);
XFS_BUF_DONE(bp);<= br>XFS_BUF_FINISH_IOWAIT(bp);=A0
=A0
buf its never called=A0by xfs_buf_relse() because=A0b_hold =3D 3.
=A0
Also we have seen that this problem always comes when bp->relse != =3D NULL && bp->hold > 1.
=A0
I do not know whether below prints will help you, but I have taken pri= ntk for super block buffer tracing
S-functionname ( Start of function)
E-functionname (End of function)
=A0
I think the problem is related to=A0xfs_buf_iodone_callbacks synchrono= us buffer error handling path and release buffer.
------------------------------------------------
buf_lock=A0=A0 (Here buffer lock success, taken after down())
S-xfs= _buf_rele - 3=A0 (Start of xfs_buf_rele(), b_hold =3D 3)
Call Trace:
[<8032c1bc>] dump_stack+0x8/0x34 from[<801cab2= c>] xfs_buf_rele+0xc8/0x28c
[<801cab2c>] xfs_buf_rele+0xc8/0x28= c from[<801cad9c>] xfs_buf_delwri_dequeue+0xac/0x13c
[<801cad9c= >] xfs_buf_delwri_dequeue+0xac/0x13c from[<801cb798>] xfs_bwrite+0= x5c/0x128
[<801cb798>] xfs_bwrite+0x5c/0x128 from[<801d5b48>] xfs_sync_fs= data+0xbc/0x17c
[<801d5b48>] xfs_sync_fsdata+0xbc/0x17c from[<8= 01d690c>] xfs_quiesce_data+0x34/0x68
[<801d690c>] xfs_quiesce_d= ata+0x34/0x68 from[<801d2b34>] xfs_fs_sync_fs+0x30/0xec
[<801d2b34>] xfs_fs_sync_fs+0x30/0xec<7>hub 2-0:1.0: state 7 po= rts 1 chg 0000 evt 0002
usb 2-1: USB disconnect, address 3
=A0from[<800b7ff0>] sync_filesystems+0x118/0x19c
[<800b7ff= 0>] sync_filesystems+0x118/0x19c from[<800db490>] do_sync+0x38/0x7= c
[<800db490>] do_sync+0x38/0x7c from[<800db510>] sys_sync+0= x10/0x20
[<800db510>] sys_sync+0x10/0x20 from[<8000ff44>] stack_done+0x2= 0/0x3c

E-xfs_buf_rele=A0 (End of function)
=A0
S-xfs_bdstrat_cb
S-xfs_buf_rele - 3
S-xfs_buf_iodone_callbacks
Device sda2, XFS m= etadata write error block 0x0 in sda2

E-xfs_buf_iodone_callbacks
Call Trace:
[<8032c1bc>] du= mp_stack+0x8/0x34 from[<801cab2c>] xfs_buf_rele+0xc8/0x28c
[<80= 1cab2c>] xfs_buf_rele+0xc8/0x28c from[<801cb2fc>] xfs_buf_ioreques= t+0xe8/0x104
[<801cb2fc>] xfs_buf_iorequest+0xe8/0x104 from[<801cbd2c>] xfs_= bdstrat_cb+0x140/0x178
[<801cbd2c>] xfs_bdstrat_cb+0x140/0x178 fro= m[<801cb7ac>] xfs_bwrite+0x70/0x128
[<801cb7ac>] xfs_bwrite+= 0x70/0x128 from[<801d5b48>] xfs_sync_fsdata+0xbc/0x17c
[<801d5b48>] xfs_sync_fsdata+0xbc/0x17c from[<801d690c>] xfs_qu= iesce_data+0x34/0x68
[<801d690c>] xfs_quiesce_data+0x34/0x68 from[= <801d2b34>] xfs_fs_sync_fs+0x30/0xec
[<801d2b34>] xfs_fs_syn= c_fs+0x30/0xec from[<800b7ff0>] sync_filesystems+0x118/0x19c
[<800b7ff0>] sync_filesystems+0x118/0x19c from[<800db490>] do_s= ync+0x38/0x7c
[<800db490>] do_sync+0x38/0x7c from[<800db510>= ] sys_sync+0x10/0x20
[<800db510>] sys_sync+0x10/0x20 from[<8000= ff44>] stack_done+0x20/0x3c

E-xfs_buf_rele
E-xfs_bdstrat_cb
xfs_force_shutdown(sda2,0x1)= called from line 1020 of file fs/xfs/linux-2.6/xfs_buf.c.=A0 Return addres= s =3D 0x801cb7f0
Filesystem "sda2": I/O Error Detected.=A0 Shu= tting down filesystem: sda2
Please umount the filesystem, and rectify the problem(s)
S-xfs_buf_relse
S-xfs_buf_rele - 2
Call Trace:
[<8032c1bc>] dump_stack+0x8/0x34 from[<801cab2= c>] xfs_buf_rele+0xc8/0x28c
[<801cab2c>] xfs_buf_rele+0xc8/0x28= c from[<801cb828>] xfs_bwrite+0xec/0x128
[<801cb828>] xfs_bw= rite+0xec/0x128 from[<801d5b48>] xfs_sync_fsdata+0xbc/0x17c
[<801d5b48>] xfs_sync_fsdata+0xbc/0x17c from[<801d690c>] xfs_qu= iesce_data+0x34/0x68
[<801d690c>] xfs_quiesce_data+0x34/0x68 from[= <801d2b34>] xfs_fs_sync_fs+0x30/0xec
[<801d2b34>] xfs_fs_syn= c_fs+0x30/0xec from[<800b7ff0>] sync_filesystems+0x118/0x19c
[<800b7ff0>] sync_filesystems+0x118/0x19c from[<800db490>] do_s= ync+0x38/0x7c
[<800db490>] do_sync+0x38/0x7c from[<800db510>= ] sys_sync+0x10/0x20
[<800db510>] sys_sync+0x10/0x20 from[<8000= ff44>] stack_done+0x20/0x3c

E-xfs_buf_rele
E-xfs_buf_relse
cp: cannot stat '/dtv/usb= /sda2/6.test': Input/output error
Filesystem "sda2": xfs_l= og_force: error 5 returned.
INFO: task khubd:56 blocked for more than 12= 0 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables th= is message.
khubd=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 D [86a516a8] 8032cb2c= =A0=A0=A0=A0 0=A0=A0=A0 56=A0=A0=A0=A0=A0 2=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0 237=A0=A0=A0=A0=A0 26=A0=A0=A0=A0=A0 (kernel thread)
Stack : 0000000= 0 801a2a6c 8643ebe0 86b43a8c 86a51830 8032cb2c 7fffffff 86a516a8
=A0=A0=A0=A0=A0=A0=A0 00000002 00000001 86b6dc00 80243a10 e0364448 8032c344= e0373f10 8032cb2c
=A0=A0=A0=A0=A0=A0=A0 00000087 0000000b 86b43ab8 801d= 61bc 3b9aca00 8032d16c 00000008 8019f0dc
=A0=A0=A0=A0=A0=A0=A0 86b43a88 = 00008000 8643ebe0 8616d900 0000000b 00000000 00000000 86bae000
=A0=A0=A0=A0=A0=A0=A0 86b43b08 801d62e0 7fffffff 86a516a8 00000002 8032e374= 00000000 8008fae4
=A0=A0=A0=A0=A0=A0=A0 ...
Call Trace:
[<8032= ca74>] __schedule+0x618/0x6b8 from[<8032cb2c>] schedule+0x18/0x3c<= br>[<8032cb2c>] schedule+0x18/0x3c from[<8032d16c>] schedule_ti= meout+0x2c/0x1c0
[<8032d16c>] schedule_timeout+0x2c/0x1c0 from[<8032e374>] __dow= n+0x8c/0xdc
[<8032e374>] __down+0x8c/0xdc from[<8004500c>] d= own+0x40/0x88
[<8004500c>] down+0x40/0x88 from[<801c9c10>] x= fs_buf_lock+0xcc/0x178
[<801c9c10>] xfs_buf_lock+0xcc/0x178 from[<801b6550>] xfs_getsb= +0x38/0x54
[<801b6550>] xfs_getsb+0x38/0x54 from[<801d5b00>]= xfs_sync_fsdata+0x74/0x17c
[<801d5b00>] xfs_sync_fsdata+0x74/0x17= c from[<801d690c>] xfs_quiesce_data+0x34/0x68
[<801d690c>] xfs_quiesce_data+0x34/0x68 from[<801d2b34>] xfs_fs= _sync_fs+0x30/0xec
[<801d2b34>] xfs_fs_sync_fs+0x30/0xec from[<= 800b878c>] __fsync_super+0xa4/0xc8
[<800b878c>] __fsync_super+0= xa4/0xc8 from[<800b87c4>] fsync_super+0x14/0x28
[<800b87c4>] fsync_super+0x14/0x28 from[<800e5cc4>] fsync_bdev+= 0x28/0x64
[<800e5cc4>] fsync_bdev+0x28/0x64 from[<801faaa8>]= invalidate_partition+0x28/0x60
[<801faaa8>] invalidate_partition+= 0x28/0x60 from[<801001b0>] del_gendisk+0x40/0xf0
[<801001b0>] del_gendisk+0x40/0xf0 from[<8025cb50>] sd_remove+0= x40/0xc8
[<8025cb50>] sd_remove+0x40/0xc8 from[<80259b5c>] s= csi_bus_remove+0x44/0x5c
[<80259b5c>] scsi_bus_remove+0x44/0x5c fr= om[<802463d4>] __device_release_driver+0x80/0xbc
[<802463d4>] __device_release_driver+0x80/0xbc from[<80246540>]= device_release_driver+0x28/0x40
[<80246540>] device_release_drive= r+0x28/0x40 from[<802457b8>] bus_remove_device+0xb0/0xf0
[<8024= 57b8>] bus_remove_device+0xb0/0xf0 from[<80243b30>] device_del+0x1= 20/0x1a8
[<80243b30>] device_del+0x120/0x1a8 from[<80259f50>] __scsi_rem= ove_device+0x40/0x98
[<80259f50>] __scsi_remove_device+0x40/0x98 f= rom[<802569cc>] scsi_forget_host+0x88/0xfc
[<802569cc>] scsi= _forget_host+0x88/0xfc from[<8024f34c>] scsi_remove_host+0xf8/0x1ac [<8024f34c>] scsi_remove_host+0xf8/0x1ac from[<e039d6bc>] quies= ce_and_remove_host+0x9c/0x12c [usb_storage]
[<e039d6bc>] quiesce_a= nd_remove_host+0x9c/0x12c [usb_storage] from[<e039d83c>] usb_stor_dis= connect+0x20/0x3c [usb_storage]
[<e039d83c>] usb_stor_disconnect+0x20/0x3c [usb_storage] from[<e03= 67c58>] usb_unbind_interface+0x68/0x128 [usbcore]
[<e0367c58>] = usb_unbind_interface+0x68/0x128 [usbcore] from[<802463d4>] __device_r= elease_driver+0x80/0xbc
[<802463d4>] __device_release_driver+0x80/0xbc from[<80246540>]= device_release_driver+0x28/0x40
[<80246540>] device_release_drive= r+0x28/0x40 from[<802457b8>] bus_remove_device+0xb0/0xf0
[<8024= 57b8>] bus_remove_device+0xb0/0xf0 from[<80243b30>] device_del+0x1= 20/0x1a8
[<80243b30>] device_del+0x120/0x1a8 from[<e0364854>] usb_disabl= e_device+0x14c/0x234 [usbcore]
[<e0364854>] usb_disable_device+0x1= 4c/0x234 [usbcore] from[<e035d6b8>] usb_disconnect+0x170/0x37c [usbco= re]
[<e035d6b8>] usb_disconnect+0x170/0x37c [usbcore] from[<e035f264&g= t;] hub_thread+0x85c/0x18f8 [usbcore]
[<e035f264>] hub_thread+0x85= c/0x18f8 [usbcore] from[<8003ff3c>] kthread+0x5c/0xa0
[<8003ff3= c>] kthread+0x5c/0xa0 from[<80008908>] kernel_thread_helper+0x10/0= x18
----------------------------------------------------------------------= ---------------
INFO: task usb_mount:395 blocked for more than 120 secon= ds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disa= bles this message.
usb_mount=A0=A0=A0=A0=A0=A0=A0 D [86163ae8] 8032cb2c=A0=A0=A0=A0 0=A0=A0 39= 5=A0=A0=A0 371=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0 (user thread)
Stack : ffffff9c 86b71ef0 00400ae= 0 800c0150 86163c70 8032cb2c 86163ae8 00000002
=A0=A0=A0=A0=A0=A0=A0 86b= bbf18 86bbbf00 00000000 00000000 86b71f00 86b71ef8 7f8b0670 8032cb2c
=A0=A0=A0=A0=A0=A0=A0 86bbb780 800b2510 00000001 86bbbf00 86bbbf00 8032f024= 86bbbf00 800b21c0
=A0=A0=A0=A0=A0=A0=A0 86bbbf00 86bbbf00 86b6dc44 86b6= dc44 86163ae8 00000002 86b6dc00 86b6dc00
=A0=A0=A0=A0=A0=A0=A0 803fe190 = 800b9350 86bbbf00 86bbbf18 86bbbef8 86bbbf00 86bbbef8 86bbbef8
=A0=A0=A0=A0=A0=A0=A0 ...
Call Trace:
[<8032ca74>] __schedule+0= x618/0x6b8 from[<8032cb2c>] schedule+0x18/0x3c
[<8032cb2c>] = schedule+0x18/0x3c from[<8032f024>] __down_write_nested+0x104/0x128[<8032f024>] __down_write_nested+0x104/0x128 from[<800b9350>]= deactivate_super+0x70/0x110
[<800b9350>] deactivate_super+0x70/0x110 from[<800d122c>] sys_u= mount+0x310/0x358
[<800d122c>] sys_umount+0x310/0x358 from[<800= 0ff44>] stack_done+0x20/0x3c
----------------------------------------------------------------------= ---------------
Filesystem "sda2": xfs_log_force: error 5 retu= rned.
--0015175cded426e1c604989fd31a-- From aelder@sgi.com Thu Dec 30 14:37:43 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKbgJf028821 for ; Thu, 30 Dec 2010 14:37:43 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id 6AC81AC012 for ; Thu, 30 Dec 2010 12:39:44 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:39:44 -0600 Subject: [PATCH 00/12] xfsprogs: fixup generate_obfuscated_name() From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:39:43 -0600 Message-ID: <1293741583.2294.341.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: quoted-printable X-OriginalArrivalTime: 30 Dec 2010 20:39:44.0080 (UTC) FILETIME=[B0BF1D00:01CBA861] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean This series has expanded some since I first posted a version of it back in October. My original purpose was to fix a bug in the function used by xfs_metadump to obfuscate file and extended attribute names. Arkadiusz Mi=C5=9Bkiewicz found out that when he attempted to perform a metadump on a filesystem which had some files whose names used 8-bit characters, it never completed. The cause was a flaw in the algorithm used to obfuscate names which caused an infinite loop when certain names got obfuscated. I have fixed that bug (in patch 4 of this series), but while I was at it I rearranged the code a bit and did some other cleanups. The first 7 patches in the series are really pretty directly related to that issue. But while in there I noticed some other somewhat subtle issues and have addressed those in this series as well: - There is a table that tracks names to ensure duplicates aren't produced as a result of obfuscation. There was a case where a failure to update the table was silently ignored. - There was still a chance that pathological cases could end up repeating due to finding duplicates. I changed it so it would give up after a fixed number of attempts. - Obfuscated names had been chosen from an alphabet of all allowable characters. This was more than needed, so I made it create names that were (mostly) printables. - It was previously possible for an obfuscated name to end up being a duplicate of a real name, because non-obfuscated names were not placed in the name table. And finally I did a little tidying of the code that manages the name table. Below is a summary of the patches, in order. -Alex xfsprogs: some things aren't all that special Some simple code refactoring to make the purpose of one help function more focused. xfsprogs: simplify leading '/' handling in generate_obfuscated_name() Another cleanup, to simplify some other changes to come. xfsprogs: drop unneeded use of a random character This tweaks the obfuscated filename algorithm slightly to simplify it, while preserving its original properties. xfsprogs: adjust rather than start over when invalid byte found This contains the real fix to the original problem. This patch contains a very long description to explain what's happening. But basically it changes the algorithm so that when a bad (random) character is produced, we don't start over, but instead modify the character (by flipping a bit), resulting in a good character that will be used. xfsprogs: eliminate a pointless loop in generate_obfuscated_name() The previous change made a loop in the code no longer needed. xfsprogs: Replace repeated blocks with a loop The code is now structured so all of the last 5 characters in an obfuscated name are handled identically. This just takes advantage of that by using a loop over them. xfsprogs: use pointers in generate_obfuscated_name() Sort of a cleanup, replacing array references with pointers. xfsprogs: ensure dup table always has entry for obfuscated name This just makes sure we create an entry in the name table before we pass back an obfuscated name. xfsprogs: don't loop on too many dups This ensures we don't loop forever (or even for very long) if we repeatedly come up with duplicate entries when obfuscating names. xfsprogs: use printable characters for obfuscated filenames This restricts the characters used for all but the last five letters of obfuscated file names to just a set of printables. xfsprogs: fix up the nametable code in db/metadump.c This encapsulates some code that works with the name table used in tracking duplicates. xfsprogs: Drop a typedef in db/metadump.c This just gets rid of an unnecessary typedef. From aelder@sgi.com Thu Dec 30 14:37:58 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.6 required=5.0 tests=BAYES_00,J_CHICKENPOX_45, J_CHICKENPOX_64,J_CHICKENPOX_71,LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKbvev028852 for ; Thu, 30 Dec 2010 14:37:57 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay1.corp.sgi.com (Postfix) with ESMTP id 9B6E58F80D2 for ; Thu, 30 Dec 2010 12:39:59 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:39:59 -0600 Subject: [PATCH 01/12] xfsprogs: some things aren't all that special From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:39:59 -0600 Message-ID: <1293741599.2294.342.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Dec 2010 20:39:59.0534 (UTC) FILETIME=[B9F534E0:01CBA861] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Move the check for short file names out of is_special_dirent() and into generate_obfuscated_name(). That way the check is more directly associated with the algorithm that requires it. Similarly, move the check for inode == 0, since that case has to do with storing extended attributes (not files) in the name table. As a result, is_special_dirent() is really only focused on whether a given file is in the lost+found directory. Rename is_special_dirent() to reflect its more specific purpose. And use a cast to elminate a compile warning in calls to libxfs_da_hashname(). Signed-off-by: Alex Elder --- db/metadump.c | 51 +++++++++++++++++++++++++++++---------------------- 1 file changed, 29 insertions(+), 22 deletions(-) Index: b/db/metadump.c =================================================================== --- a/db/metadump.c +++ b/db/metadump.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2007 Silicon Graphics, Inc. + * Copyright (c) 2007,2010 SGI * All Rights Reserved. * * This program is free software; you can redistribute it and/or @@ -377,8 +377,15 @@ random_filename_char(void) return c; } +/* + * We won't obfuscate "lost+found" nor any inodes within it. + * + * Record the "lost+found" directory's inode number when it's found. + * While processing that directory, any file whose name matches + * its inode number is left as-is (no obfuscation). + */ static int -is_special_dirent( +in_lost_found( xfs_ino_t ino, int namelen, uchar_t *name) @@ -387,22 +394,8 @@ is_special_dirent( char s[32]; int slen; - /* - * due to the XFS name hashing algorithm, we cannot obfuscate - * names with 4 chars or less. - */ - if (namelen <= 4) - return 1; - - if (ino == 0) - return 0; - - /* - * don't obfuscate lost+found nor any inodes within lost+found with - * the inode number - */ - if (cur_ino == mp->m_sb.sb_rootino && namelen == 10 && - memcmp(name, "lost+found", 10) == 0) { + if (!orphanage_ino && cur_ino == mp->m_sb.sb_rootino && + namelen == 10 && !memcmp(name, "lost+found", 10)) { orphanage_ino = ino; return 1; } @@ -410,7 +403,8 @@ is_special_dirent( return 0; slen = sprintf(s, "%lld", (long long)ino); - return (slen == namelen && memcmp(name, s, namelen) == 0); + + return slen == namelen && !memcmp(name, s, namelen); } static void @@ -426,10 +420,23 @@ generate_obfuscated_name( xfs_dahash_t newhash; uchar_t newname[NAME_MAX]; - if (is_special_dirent(ino, namelen, name)) + /* + * Our obfuscation algorithm requires at least 5-character + * names, so don't bother if the name is too short. + */ + if (namelen < 5) + return; + + /* + * We don't obfuscate "lost+found" or any of the files + * therein. When the name table is used for extended + * attributes, the inode number provided is 0, in which + * case we don't need to make this check. + */ + if (ino && in_lost_found(ino, namelen, name)) return; - hash = libxfs_da_hashname(name, namelen); + hash = libxfs_da_hashname((char *) name, namelen); /* create a random name with the same hash value */ @@ -468,7 +475,7 @@ generate_obfuscated_name( break; } - ASSERT(libxfs_da_hashname(newname, namelen) == hash); + ASSERT(libxfs_da_hashname((char *) newname, namelen) == hash); for (p = nametable[hash % NAME_TABLE_SIZE]; p; p = p->next) { if (p->hash == hash && p->namelen == namelen && From aelder@sgi.com Thu Dec 30 14:38:08 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_47 autolearn=no version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKc8RV028880 for ; Thu, 30 Dec 2010 14:38:08 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id 261C3AC011 for ; Thu, 30 Dec 2010 12:40:13 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:40:12 -0600 Subject: [PATCH 02/12] xfsprogs: simplify leading '/' handling in generate_obfuscated_name() From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:40:12 -0600 Message-ID: <1293741612.2294.354.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Dec 2010 20:40:12.0815 (UTC) FILETIME=[C1DFB9F0:01CBA861] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean In generate_obfuscated_name(), the incoming file name is allowed to start with a '/' character, in which case it is copied over to the new file name and ignored for the remainder of the hash calculation. Simplify the affected code by processing the '/' right away, and using a pointer thereafter for the start of the new file name. Signed-off-by: Alex Elder --- db/metadump.c | 67 ++++++++++++++++++++++++++++++++++++---------------------- 1 file changed, 42 insertions(+), 25 deletions(-) Index: b/db/metadump.c =================================================================== --- a/db/metadump.c +++ b/db/metadump.c @@ -419,6 +419,7 @@ generate_obfuscated_name( int dup; xfs_dahash_t newhash; uchar_t newname[NAME_MAX]; + uchar_t *newp = &newname[0]; /* * Our obfuscation algorithm requires at least 5-character @@ -438,39 +439,55 @@ generate_obfuscated_name( hash = libxfs_da_hashname((char *) name, namelen); - /* create a random name with the same hash value */ - + /* + * If the name starts with a slash, just skip over it. We + * will copy our obfuscated name back into space following + * the slash when we're done. Our new name will not have + * the '/', and that's the version we'll keep in our + * duplicates table. Note that the namelen value passed in + * does not include the leading slash (if any). + */ + if (*name == '/') + name++; do { dup = 0; - newname[0] = '/'; - for (;;) { - /* if the first char is a "/", preserve it */ - i = (name[0] == '/'); - - for (newhash = 0; i < namelen - 5; i++) { - newname[i] = random_filename_char(); - newhash = newname[i] ^ rol32(newhash, 7); + /* + * The beginning of the obfuscated name can + * be pretty much anything, so fill it in + * with random characters. Accumulate its + * new hash value as we go. + */ + newhash = 0; + for (i = 0; i < namelen - 5; i++) { + newp[i] = random_filename_char(); + newhash = newp[i] ^ rol32(newhash, 7); } + + /* + * Compute which five bytes need to be used + * at the end of the name so the hash of the + * obfuscated name is the same as the hash + * of the original. + */ newhash = rol32(newhash, 3) ^ hash; - if (name[0] != '/' || namelen > 5) { - newname[namelen - 5] = (newhash >> 28) | - (random_filename_char() & 0xf0); - if (is_invalid_char(newname[namelen - 5])) - continue; - } - newname[namelen - 4] = (newhash >> 21) & 0x7f; - if (is_invalid_char(newname[namelen - 4])) + + newp[namelen - 5] = (newhash >> 28) | + (random_filename_char() & 0xf0); + if (is_invalid_char(newp[namelen - 5])) + continue; + newp[namelen - 4] = (newhash >> 21) & 0x7f; + if (is_invalid_char(newp[namelen - 4])) continue; - newname[namelen - 3] = (newhash >> 14) & 0x7f; - if (is_invalid_char(newname[namelen - 3])) + newp[namelen - 3] = (newhash >> 14) & 0x7f; + if (is_invalid_char(newp[namelen - 3])) continue; - newname[namelen - 2] = (newhash >> 7) & 0x7f; - if (is_invalid_char(newname[namelen - 2])) + newp[namelen - 2] = (newhash >> 7) & 0x7f; + if (is_invalid_char(newp[namelen - 2])) continue; - newname[namelen - 1] = ((newhash >> 0) ^ - (newname[namelen - 5] >> 4)) & 0x7f; - if (is_invalid_char(newname[namelen - 1])) + newp[namelen - 1] = ((newhash >> 0) ^ + (newp[namelen - 5] >> 4)) & 0x7f; + if (is_invalid_char(newp[namelen - 1])) continue; break; } From aelder@sgi.com Thu Dec 30 14:38:23 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_47 autolearn=no version=3.4.0-r929098 Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKcNmZ028907 for ; Thu, 30 Dec 2010 14:38:23 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay2.corp.sgi.com (Postfix) with ESMTP id 25700304053 for ; Thu, 30 Dec 2010 12:40:25 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:40:25 -0600 Subject: [PATCH 03/12] xfsprogs: drop unneeded use of a random character From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:40:24 -0600 Message-ID: <1293741624.2294.355.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Dec 2010 20:40:25.0049 (UTC) FILETIME=[C92A7C90:01CBA861] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean With the exception of the last five bytes, an obfuscated filename is simply a random string of (filesystem-acceptable) characters. The last five bytes are chosen, based on the random portion before them, such that the resulting obfuscated name has the same hash value as the original filename. This is done by essentially working backwards from the difference between the original hash and the hash value computed for the obfuscated name so far, picking final bytes based on how that difference gets manipulated by completing the hash computation. Of those last 5 bytes, all but the upper half of the first one are completely determined by this process. The upper part of the first one is currently computed as 4 random bits, just like the entire first part of the obfuscated name. But the lower nibble of that byte is already effectively random, resulting from the hash computation (or the difference between two of them). We can choose to use 0's for that upper nibble and it will have no significant effect on the randomoness of the result. Doing this simplifies the generation of two of the final five characters, and makes all five of them get computed in a consistent way. Add the use of a mask in the one case it wasn't used to be even more consistent. Signed-off-by: Alex Elder --- db/metadump.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) Index: b/db/metadump.c =================================================================== --- a/db/metadump.c +++ b/db/metadump.c @@ -472,8 +472,7 @@ generate_obfuscated_name( */ newhash = rol32(newhash, 3) ^ hash; - newp[namelen - 5] = (newhash >> 28) | - (random_filename_char() & 0xf0); + newp[namelen - 5] = (newhash >> 28) & 0x7f; if (is_invalid_char(newp[namelen - 5])) continue; newp[namelen - 4] = (newhash >> 21) & 0x7f; @@ -485,8 +484,7 @@ generate_obfuscated_name( newp[namelen - 2] = (newhash >> 7) & 0x7f; if (is_invalid_char(newp[namelen - 2])) continue; - newp[namelen - 1] = ((newhash >> 0) ^ - (newp[namelen - 5] >> 4)) & 0x7f; + newp[namelen - 1] = (newhash >> 0) & 0x7f; if (is_invalid_char(newp[namelen - 1])) continue; break; From aelder@sgi.com Thu Dec 30 14:38:33 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-4.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_47, LOCAL_GNU_PATCH autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKcX57028933 for ; Thu, 30 Dec 2010 14:38:33 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay1.corp.sgi.com (Postfix) with ESMTP id 0BF738F80D2 for ; Thu, 30 Dec 2010 12:40:37 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:40:37 -0600 Subject: [PATCH 04/12] xfsprogs: adjust rather than start over when invalid byte found From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:40:37 -0600 Message-ID: <1293741637.2294.356.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: quoted-printable X-OriginalArrivalTime: 30 Dec 2010 20:40:37.0878 (UTC) FILETIME=[D0D00960:01CBA861] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean The last 5 bytes of a filename generated by generate_obfuscated_name() can be selected such that they (along with all of the preceding characters in the filename) produce any desired value when hashed. They are selected based on how their value affects the outcome of the hash calculation for the obfuscated name. Each byte is XOR'd into the hash at a certain position. The portion of the hash affected by each of these last five bytes can be seen visually below: +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+ hash: | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-|-+-+-+-+-+-+-+-+ last-4 ->| |<-- last-2 --->| |<--- last ---->| |<-- last-3 --->| |<-- last-1 --->| |<- last-4 (Note byte (last - 4) wraps around. The previous patch in this series eliminated the effect of the upper 4 bits of that byte by forcing them to be all be 0 bits.) Using the (XOR) difference between the hash computed for the beginning of the obfuscated name and the hash from the original value, we can directly determine the required final five bytes to make the hashes for the two complete filenames match. The lower byte (bits 0-7) of that difference is used for the last character in the obfuscated name, bits 7-14 for the second-to-last, and so on. It's possible for those portions to result in characters ('\0' and '/') that are not allowed in valid file names. If this occurs, the existing code abandons the current obfuscated file name and starts again from the beginning. But there exist cases where this can lead to a never-ending loop. Arkadiusz Mi=C5=9Bkiewicz encountered just such a name, "R\323\257NE". That filename produces hash value 0x3a4be740, which requires that the obfuscated name uses '/' at position last-2. The current algorithm starts over, but since there are no random characters in this length-5 obfuscated name, no other possibility will be found and the process repeats forever. This change modifies the algorithm used so that if a non-allowed character arises, we flip a bit in that character (which results in an allowed character), along with another "matching" bit in another byte such that the resulting hash is unchanged. The two un-allowed characters in a pathname component are '\0' (0x00) and '/' (0x2f). Flipping any one bit in either one of those characters converts it to an allowed character. Flipping two distinct bits also results in an allowed character. As seen in the diagram above, the effect of each character on the hash overlaps two other characters. We can choose to flip one of the overlapping bits in a "bad" character, then flip the overlapping bit in the next byte, and the result will produce the same hash. So, starting with the first of these last 5 bytes (last-4), if its "normal" value is one of the invalid ones, we flip its low bit and arrange to flip the high bit of its successor byte. The very last byte has a little different treatment. We can flip its low bit, but it has no successor byte per se. Its effect on the hash does overlap the first byte of the 5-byte series though, so we can flip the corresponding bit in that (at position 0x10). There is one more case to consider. It's possible in that last case that by flipping a bit in byte (last-4), we have converted that byte to one that's not allowed. Fortunately, we have four bits of overlap here, so we can choose to flip a second bit in both the last byte and its corresponding bit at (last-4). Since flipping two bits also results in an allowed character, this resolves the issue. With these changes to the filename generation algorithm, we avoid any of the cases in which no alternate name can be found without using an illegal character. We also avoid all looping due to bad characters. Reported-by: Arkadiusz Mi=C5=9Bkiewicz Signed-off-by: Alex Elder --- db/metadump.c | 77 +++++++++++++++++++++++++++++++++++++++++++++--------= ----- 1 file changed, 61 insertions(+), 16 deletions(-) Index: b/db/metadump.c =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D --- a/db/metadump.c +++ b/db/metadump.c @@ -452,6 +452,8 @@ generate_obfuscated_name( do { dup =3D 0; for (;;) { + uchar_t high_bit; + /* * The beginning of the obfuscated name can * be pretty much anything, so fill it in @@ -468,25 +470,68 @@ generate_obfuscated_name( * Compute which five bytes need to be used * at the end of the name so the hash of the * obfuscated name is the same as the hash - * of the original. + * of the original. If any result in an + * invalid character, flip a bit and arrange + * for a corresponding bit in a neighboring + * byte to be flipped as well. For the last + * byte, the "neighbor" to change is the + * first byte we're computing here. */ newhash =3D rol32(newhash, 3) ^ hash; =20 - newp[namelen - 5] =3D (newhash >> 28) & 0x7f; - if (is_invalid_char(newp[namelen - 5])) - continue; - newp[namelen - 4] =3D (newhash >> 21) & 0x7f; - if (is_invalid_char(newp[namelen - 4])) - continue; - newp[namelen - 3] =3D (newhash >> 14) & 0x7f; - if (is_invalid_char(newp[namelen - 3])) - continue; - newp[namelen - 2] =3D (newhash >> 7) & 0x7f; - if (is_invalid_char(newp[namelen - 2])) - continue; - newp[namelen - 1] =3D (newhash >> 0) & 0x7f; - if (is_invalid_char(newp[namelen - 1])) - continue; + high_bit =3D 0; + + newp[namelen - 5] =3D ((newhash >> 28) & 0x7f) ^ high_bit; + if (is_invalid_char(newp[namelen - 5])) { + newp[namelen - 5] ^=3D 1; + high_bit =3D 0x80; + } else + high_bit =3D 0; + + newp[namelen - 4] =3D ((newhash >> 21) & 0x7f) ^ high_bit; + if (is_invalid_char(newp[namelen - 4])) { + newp[namelen - 4] ^=3D 1; + high_bit =3D 0x80; + } else + high_bit =3D 0; + + newp[namelen - 3] =3D ((newhash >> 14) & 0x7f) ^ high_bit; + if (is_invalid_char(newp[namelen - 3])) { + newp[namelen - 3] ^=3D 1; + high_bit =3D 0x80; + } else + high_bit =3D 0; + + newp[namelen - 2] =3D ((newhash >> 7) & 0x7f) ^ high_bit; + if (is_invalid_char(newp[namelen - 2])) { + newp[namelen - 2] ^=3D 1; + high_bit =3D 0x80; + } else + high_bit =3D 0; + + newp[namelen - 1] =3D ((newhash >> 0) & 0x7f) ^ high_bit; + if (is_invalid_char(newp[namelen - 1])) { + newp[namelen - 1] ^=3D 1; + high_bit =3D 0x80; + } else + high_bit =3D 0; + + /* + * If we flipped a bit on the last byte, we + * need to fix up the first one we computed. + * That could make that first character + * invalid, in which case we flip one more + * bit in both bytes. + */ + if (high_bit) { + newp[namelen - 5] ^=3D 0x10; + if (is_invalid_char(newp[namelen - 5])) { + newp[namelen - 1] ^=3D 2; + newp[namelen - 5] ^=3D 0x20; + ASSERT(!is_invalid_char(newp[namelen - 1])); + ASSERT(!is_invalid_char(newp[namelen - 5])); + } + } break; } =20 From aelder@sgi.com Thu Dec 30 14:38:46 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_47 autolearn=no version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKckYm028965 for ; Thu, 30 Dec 2010 14:38:46 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id BB2CAAC011 for ; Thu, 30 Dec 2010 12:40:50 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:40:50 -0600 Subject: [PATCH 05/12] xfsprogs: eliminate a pointless loop in generate_obfuscated_name() From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:40:49 -0600 Message-ID: <1293741649.2294.357.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Dec 2010 20:40:50.0425 (UTC) FILETIME=[D84A8E90:01CBA861] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Eliminate a now pointless loop. Done as a separate patch to make the effects of upcoming changes more clear. Signed-off-by: Alex Elder --- db/metadump.c | 146 ++++++++++++++++++++++++++++------------------------------ 1 file changed, 71 insertions(+), 75 deletions(-) Index: b/db/metadump.c =================================================================== --- a/db/metadump.c +++ b/db/metadump.c @@ -450,89 +450,85 @@ generate_obfuscated_name( if (*name == '/') name++; do { + uchar_t high_bit; + dup = 0; - for (;;) { - uchar_t high_bit; - /* - * The beginning of the obfuscated name can - * be pretty much anything, so fill it in - * with random characters. Accumulate its - * new hash value as we go. - */ - newhash = 0; - for (i = 0; i < namelen - 5; i++) { - newp[i] = random_filename_char(); - newhash = newp[i] ^ rol32(newhash, 7); - } + /* + * The beginning of the obfuscated name can be + * pretty much anything, so fill it in with random + * characters. Accumulate its new hash value as we + * go. + */ + newhash = 0; + for (i = 0; i < namelen - 5; i++) { + newp[i] = random_filename_char(); + newhash = newp[i] ^ rol32(newhash, 7); + } - /* - * Compute which five bytes need to be used - * at the end of the name so the hash of the - * obfuscated name is the same as the hash - * of the original. If any result in an - * invalid character, flip a bit and arrange - * for a corresponding bit in a neighboring - * byte to be flipped as well. For the last - * byte, the "neighbor" to change is the - * first byte we're computing here. - */ - newhash = rol32(newhash, 3) ^ hash; + /* + * Compute which five bytes need to be used at the + * end of the name so the hash of the obfuscated + * name is the same as the hash of the original. If + * any result in an invalid character, flip a bit + * and arrange for a corresponding bit in a + * neighboring byte to be flipped as well. For the + * last byte, the "neighbor" to change is the first + * byte we're computing here. + */ + newhash = rol32(newhash, 3) ^ hash; + high_bit = 0; + + newp[namelen - 5] = ((newhash >> 28) & 0x7f) ^ high_bit; + if (is_invalid_char(newp[namelen - 5])) { + newp[namelen - 5] ^= 1; + high_bit = 0x80; + } else high_bit = 0; - newp[namelen - 5] = ((newhash >> 28) & 0x7f) ^ high_bit; - if (is_invalid_char(newp[namelen - 5])) { - newp[namelen - 5] ^= 1; - high_bit = 0x80; - } else - high_bit = 0; - - newp[namelen - 4] = ((newhash >> 21) & 0x7f) ^ high_bit; - if (is_invalid_char(newp[namelen - 4])) { - newp[namelen - 4] ^= 1; - high_bit = 0x80; - } else - high_bit = 0; - - newp[namelen - 3] = ((newhash >> 14) & 0x7f) ^ high_bit; - if (is_invalid_char(newp[namelen - 3])) { - newp[namelen - 3] ^= 1; - high_bit = 0x80; - } else - high_bit = 0; - - newp[namelen - 2] = ((newhash >> 7) & 0x7f) ^ high_bit; - if (is_invalid_char(newp[namelen - 2])) { - newp[namelen - 2] ^= 1; - high_bit = 0x80; - } else - high_bit = 0; - - newp[namelen - 1] = ((newhash >> 0) & 0x7f) ^ high_bit; - if (is_invalid_char(newp[namelen - 1])) { - newp[namelen - 1] ^= 1; - high_bit = 0x80; - } else - high_bit = 0; + newp[namelen - 4] = ((newhash >> 21) & 0x7f) ^ high_bit; + if (is_invalid_char(newp[namelen - 4])) { + newp[namelen - 4] ^= 1; + high_bit = 0x80; + } else + high_bit = 0; - /* - * If we flipped a bit on the last byte, we - * need to fix up the first one we computed. - * That could make that first character - * invalid, in which case we flip one more - * bit in both bytes. - */ - if (high_bit) { - newp[namelen - 5] ^= 0x10; - if (is_invalid_char(newp[namelen - 5])) { - newp[namelen - 1] ^= 2; - newp[namelen - 5] ^= 0x20; - ASSERT(!is_invalid_char(newp[namelen - 1])); - ASSERT(!is_invalid_char(newp[namelen - 5])); - } + newp[namelen - 3] = ((newhash >> 14) & 0x7f) ^ high_bit; + if (is_invalid_char(newp[namelen - 3])) { + newp[namelen - 3] ^= 1; + high_bit = 0x80; + } else + high_bit = 0; + + newp[namelen - 2] = ((newhash >> 7) & 0x7f) ^ high_bit; + if (is_invalid_char(newp[namelen - 2])) { + newp[namelen - 2] ^= 1; + high_bit = 0x80; + } else + high_bit = 0; + + newp[namelen - 1] = ((newhash >> 0) & 0x7f) ^ high_bit; + if (is_invalid_char(newp[namelen - 1])) { + newp[namelen - 1] ^= 1; + high_bit = 0x80; + } else + high_bit = 0; + + /* + * If we flipped a bit on the last byte, we need to + * fix up the first one we computed. That could + * make that first character invalid, in which case + * we flip one more bit in both bytes. + */ + if (high_bit) { + newp[namelen - 5] ^= 0x10; + if (is_invalid_char(newp[namelen - 5])) { + newp[namelen - 1] ^= 2; + newp[namelen - 5] ^= 0x20; + ASSERT(!is_invalid_char(newp[namelen - 1])); + ASSERT(!is_invalid_char(newp[namelen - 5])); } - break; } ASSERT(libxfs_da_hashname((char *) newname, namelen) == hash); From aelder@sgi.com Thu Dec 30 14:39:06 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_47 autolearn=no version=3.4.0-r929098 Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKd5T3028995 for ; Thu, 30 Dec 2010 14:39:06 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay1.corp.sgi.com (Postfix) with ESMTP id 8FD748F80D3 for ; Thu, 30 Dec 2010 12:41:10 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:41:10 -0600 Subject: [PATCH: 06 /12] xfsprogs: replace repeated blocks with a loop From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:41:09 -0600 Message-ID: <1293741669.2294.365.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Dec 2010 20:41:10.0487 (UTC) FILETIME=[E43FC670:01CBA861] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Replace a repeated block of code with an equivalent loop. Signed-off-by: Alex Elder --- db/metadump.c | 43 +++++++++---------------------------------- 1 file changed, 9 insertions(+), 34 deletions(-) Index: b/db/metadump.c =================================================================== --- a/db/metadump.c +++ b/db/metadump.c @@ -479,41 +479,16 @@ generate_obfuscated_name( newhash = rol32(newhash, 3) ^ hash; high_bit = 0; + for (i = 5; i > 0; i--) { + int shift = (i - 1) * 7; - newp[namelen - 5] = ((newhash >> 28) & 0x7f) ^ high_bit; - if (is_invalid_char(newp[namelen - 5])) { - newp[namelen - 5] ^= 1; - high_bit = 0x80; - } else - high_bit = 0; - - newp[namelen - 4] = ((newhash >> 21) & 0x7f) ^ high_bit; - if (is_invalid_char(newp[namelen - 4])) { - newp[namelen - 4] ^= 1; - high_bit = 0x80; - } else - high_bit = 0; - - newp[namelen - 3] = ((newhash >> 14) & 0x7f) ^ high_bit; - if (is_invalid_char(newp[namelen - 3])) { - newp[namelen - 3] ^= 1; - high_bit = 0x80; - } else - high_bit = 0; - - newp[namelen - 2] = ((newhash >> 7) & 0x7f) ^ high_bit; - if (is_invalid_char(newp[namelen - 2])) { - newp[namelen - 2] ^= 1; - high_bit = 0x80; - } else - high_bit = 0; - - newp[namelen - 1] = ((newhash >> 0) & 0x7f) ^ high_bit; - if (is_invalid_char(newp[namelen - 1])) { - newp[namelen - 1] ^= 1; - high_bit = 0x80; - } else - high_bit = 0; + newp[namelen - i] = ((newhash >> shift) & 0x7f) ^ high_bit; + if (is_invalid_char(newp[namelen - i])) { + newp[namelen - i] ^= 1; + high_bit = 0x80; + } else + high_bit = 0; + } /* * If we flipped a bit on the last byte, we need to From aelder@sgi.com Thu Dec 30 14:39:19 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_47 autolearn=no version=3.4.0-r929098 Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKdIoO029025 for ; Thu, 30 Dec 2010 14:39:18 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay2.corp.sgi.com (Postfix) with ESMTP id BDD16304039 for ; Thu, 30 Dec 2010 12:41:23 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:41:23 -0600 Subject: [PATCH 07/12] xfsprogs: use pointers in generate_obfuscated_name() From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:41:23 -0600 Message-ID: <1293741683.2294.366.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Dec 2010 20:41:23.0675 (UTC) FILETIME=[EC1C1AB0:01CBA861] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Switch from using array references to using pointers to refer to the pathname characters as they get generated. Also limit the scope of a few automatic variables. Signed-off-by: Alex Elder --- db/metadump.c | 42 ++++++++++++++++++++++-------------------- 1 file changed, 22 insertions(+), 20 deletions(-) Index: b/db/metadump.c =================================================================== --- a/db/metadump.c +++ b/db/metadump.c @@ -415,11 +415,8 @@ generate_obfuscated_name( { xfs_dahash_t hash; name_ent_t *p; - int i; int dup; - xfs_dahash_t newhash; uchar_t newname[NAME_MAX]; - uchar_t *newp = &newname[0]; /* * Our obfuscation algorithm requires at least 5-character @@ -450,7 +447,12 @@ generate_obfuscated_name( if (*name == '/') name++; do { - uchar_t high_bit; + int i; + xfs_dahash_t newhash = 0; + uchar_t *newp = &newname[0]; + uchar_t *first; + uchar_t high_bit; + int shift; dup = 0; @@ -460,10 +462,10 @@ generate_obfuscated_name( * characters. Accumulate its new hash value as we * go. */ - newhash = 0; for (i = 0; i < namelen - 5; i++) { - newp[i] = random_filename_char(); - newhash = newp[i] ^ rol32(newhash, 7); + *newp = random_filename_char(); + newhash = *newp ^ rol32(newhash, 7); + newp++; } /* @@ -478,16 +480,16 @@ generate_obfuscated_name( */ newhash = rol32(newhash, 3) ^ hash; + first = newp; high_bit = 0; - for (i = 5; i > 0; i--) { - int shift = (i - 1) * 7; - - newp[namelen - i] = ((newhash >> shift) & 0x7f) ^ high_bit; - if (is_invalid_char(newp[namelen - i])) { - newp[namelen - i] ^= 1; + for (shift = 28; shift >= 0; shift -= 7) { + *newp = (newhash >> shift & 0x7f) ^ high_bit; + if (is_invalid_char(*newp)) { + *newp ^= 1; high_bit = 0x80; } else high_bit = 0; + newp++; } /* @@ -497,12 +499,12 @@ generate_obfuscated_name( * we flip one more bit in both bytes. */ if (high_bit) { - newp[namelen - 5] ^= 0x10; - if (is_invalid_char(newp[namelen - 5])) { - newp[namelen - 1] ^= 2; - newp[namelen - 5] ^= 0x20; - ASSERT(!is_invalid_char(newp[namelen - 1])); - ASSERT(!is_invalid_char(newp[namelen - 5])); + *first ^= 0x10; + if (is_invalid_char(*first)) { + *--newp ^= 2; + *first ^= 0x20; + ASSERT(!is_invalid_char(*newp)); + ASSERT(!is_invalid_char(*first)); } } @@ -510,7 +512,7 @@ generate_obfuscated_name( for (p = nametable[hash % NAME_TABLE_SIZE]; p; p = p->next) { if (p->hash == hash && p->namelen == namelen && - memcmp(p->name, newname, namelen) == 0){ + !memcmp(p->name, newname, namelen)) { dup = 1; break; } From aelder@sgi.com Thu Dec 30 14:39:41 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_64 autolearn=no version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKdfi7029057 for ; Thu, 30 Dec 2010 14:39:41 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id CE5F6AC011 for ; Thu, 30 Dec 2010 12:41:45 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:41:45 -0600 Subject: [PATCH 08/12] xfsprogs: ensure dup table always has entry for obfuscated name From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:41:45 -0600 Message-ID: <1293741705.2294.367.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Dec 2010 20:41:45.0503 (UTC) FILETIME=[F91ECAF0:01CBA861] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean We need to ensure the name table has a copy of all the names in a directory in order to avoid creating duplicate entries when obfuscating names. Currently there is an (unlikely) case where the name is passed back without such an entry being created. Reorder things so that won't happen. Signed-off-by: Alex Elder --- db/metadump.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-) Index: b/db/metadump.c =================================================================== --- a/db/metadump.c +++ b/db/metadump.c @@ -519,18 +519,22 @@ generate_obfuscated_name( } } while (dup); - memcpy(name, newname, namelen); + /* Create an entry for the name in the name table */ p = malloc(sizeof(name_ent_t) + namelen); if (p == NULL) return; - p->next = nametable[hash % NAME_TABLE_SIZE]; - p->hash = hash; p->namelen = namelen; - memcpy(p->name, name, namelen); + memcpy(p->name, newname, namelen); + p->hash = hash; + p->next = nametable[hash % NAME_TABLE_SIZE]; nametable[hash % NAME_TABLE_SIZE] = p; + + /* Update the caller's copy with the obfuscated name */ + + memcpy(name, newname, namelen); } static void From aelder@sgi.com Thu Dec 30 14:40:02 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_64 autolearn=no version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKe246029146 for ; Thu, 30 Dec 2010 14:40:02 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id DDEE9AC011 for ; Thu, 30 Dec 2010 12:42:06 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:42:06 -0600 Subject: [PATCH 09/12] xfsprogs: don't loop on too many dups From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:42:06 -0600 Message-ID: <1293741726.2294.368.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Dec 2010 20:42:06.0503 (UTC) FILETIME=[05A32370:01CBA862] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Don't just loop indefinitely when an obfuscated name comes up as a duplicate. Count the number of times we've found a duplicate, and if it gets excessive just give up and use the original name without obfuscation. Signed-off-by: Alex Elder --- db/metadump.c | 35 ++++++++++++++++++++++++++--------- 1 file changed, 26 insertions(+), 9 deletions(-) Index: b/db/metadump.c =================================================================== --- a/db/metadump.c +++ b/db/metadump.c @@ -29,6 +29,14 @@ #define DEFAULT_MAX_EXT_SIZE 1000 +/* + * It's possible that more than one file in a directory produce the + * same obfuscated name. If that happens, we try to create another + * one. After several rounds of this though, we just give up and + * leave the original name as-is. + */ +#define DUP_MAX 5 /* Max duplicates before we give up */ + /* copy all metadata structures to/from a file */ static int metadump_f(int argc, char **argv); @@ -415,7 +423,7 @@ generate_obfuscated_name( { xfs_dahash_t hash; name_ent_t *p; - int dup; + int dup = 0; uchar_t newname[NAME_MAX]; /* @@ -454,8 +462,6 @@ generate_obfuscated_name( uchar_t high_bit; int shift; - dup = 0; - /* * The beginning of the obfuscated name can be * pretty much anything, so fill it in with random @@ -510,14 +516,24 @@ generate_obfuscated_name( ASSERT(libxfs_da_hashname((char *) newname, namelen) == hash); + /* + * Search the name table to be sure we don't produce + * a name that's already been used. + */ for (p = nametable[hash % NAME_TABLE_SIZE]; p; p = p->next) { if (p->hash == hash && p->namelen == namelen && - !memcmp(p->name, newname, namelen)) { - dup = 1; + !memcmp(p->name, newname, namelen)) break; - } } - } while (dup); + if (p) + dup++; + else + dup = 0; + } while (dup && dup < DUP_MAX); + + /* Use the original name if we got too many dups. */ + + newp = dup ? name : newname; /* Create an entry for the name in the name table */ @@ -526,7 +542,7 @@ generate_obfuscated_name( return; p->namelen = namelen; - memcpy(p->name, newname, namelen); + memcpy(p->name, newp, namelen); p->hash = hash; p->next = nametable[hash % NAME_TABLE_SIZE]; @@ -534,7 +550,8 @@ generate_obfuscated_name( /* Update the caller's copy with the obfuscated name */ - memcpy(name, newname, namelen); + if (newp != name) + memcpy(name, newp, namelen); } static void From aelder@sgi.com Thu Dec 30 14:40:26 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKeQ0d029252 for ; Thu, 30 Dec 2010 14:40:26 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay2.corp.sgi.com (Postfix) with ESMTP id 47B12304053 for ; Thu, 30 Dec 2010 12:42:31 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:42:31 -0600 Subject: [PATCH 10/12] xfsprogs: use printable characters for obfuscated filenames From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:42:30 -0600 Message-ID: <1293741750.2294.372.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Dec 2010 20:42:31.0191 (UTC) FILETIME=[145A3A70:01CBA862] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean There is probably not much need for an extreme amount of randomness in the obfuscated names produced in metadumps. Limit the character set used for (most of) these filenames to printable characters rather than every permitted byte. The result makes metadumps a bit more natural to work with. I chose the set of all upper- and lower-case letters, digits, and the dash and underscore for the alphabet. It could easily be expanded to include others. Signed-off-by: Alex Elder --- db/metadump.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) Index: b/db/metadump.c =================================================================== --- a/db/metadump.c +++ b/db/metadump.c @@ -377,12 +377,11 @@ clear_nametable(void) static inline uchar_t random_filename_char(void) { - uchar_t c; + static uchar_t filename_alphabet[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZ" + "abcdefghijklmnopqrstuvwxyz" + "0123456789-_"; - do { - c = random() % 127 + 1; - } while (c == '/'); - return c; + return filename_alphabet[random() % (sizeof filename_alphabet - 1)]; } /* From aelder@sgi.com Thu Dec 30 14:40:43 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00,J_CHICKENPOX_64, J_CHICKENPOX_66 autolearn=no version=3.4.0-r929098 Received: from relay.sgi.com (relay2.corp.sgi.com [137.38.102.29]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKehA5029316 for ; Thu, 30 Dec 2010 14:40:43 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay2.corp.sgi.com (Postfix) with ESMTP id 29853304053 for ; Thu, 30 Dec 2010 12:42:48 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:42:48 -0600 Subject: [PATCH 11/12] xfsprogs: fix up the nametable code in db/metadump.c From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:42:47 -0600 Message-ID: <1293741767.2294.373.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Dec 2010 20:42:48.0066 (UTC) FILETIME=[1E692620:01CBA862] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean The name table used to find duplicates in metadump.c is allocated dynamically, but there's no real need to do so. Just make it a BSS global array and drop the initialization call. Meanwhile, encapsulate the code that add entries to and look up entries in the table into their own functions. Use the lookup function to detect a duplicate name in a case not previously checked. Change the naming scheme to use "nametable" as a prefix rather than a suffix. Signed-off-by: Alex Elder --- db/metadump.c | 118 ++++++++++++++++++++++++++++++++-------------------------- 1 file changed, 66 insertions(+), 52 deletions(-) Index: b/db/metadump.c =================================================================== --- a/db/metadump.c +++ b/db/metadump.c @@ -346,30 +346,61 @@ typedef struct name_ent { #define NAME_TABLE_SIZE 4096 -static name_ent_t **nametable; - -static int -create_nametable(void) -{ - nametable = calloc(NAME_TABLE_SIZE, sizeof(name_ent_t)); - return nametable != NULL; -} +static struct name_ent *nametable[NAME_TABLE_SIZE]; static void -clear_nametable(void) +nametable_clear(void) { - int i; - name_ent_t *p; + int i; + name_ent_t *ent; for (i = 0; i < NAME_TABLE_SIZE; i++) { - while (nametable[i]) { - p = nametable[i]; - nametable[i] = p->next; - free(p); + while ((ent = nametable[i])) { + nametable[i] = ent->next; + free(ent); } } } +/* + * See if the given name is already in the name table. If so, + * return a pointer to its entry, otherwise return a null pointer. + */ +static struct name_ent * +nametable_find(xfs_dahash_t hash, int namelen, uchar_t *name) +{ + struct name_ent *ent; + + for (ent = nametable[hash % NAME_TABLE_SIZE]; ent; ent = ent->next) { + if (ent->hash == hash && ent->namelen == namelen && + !memcmp(ent->name, name, namelen)) + return ent; + } + return NULL; +} + +/* + * Add the given name to the name table. Returns a pointer to the + * name's new entry, or a null pointer if an error occurs. + */ +static struct name_ent * +nametable_add(xfs_dahash_t hash, int namelen, uchar_t *name) +{ + struct name_ent *ent; + + ent = malloc(sizeof *ent + namelen); + if (!ent) + return NULL; + + ent->namelen = namelen; + memcpy(ent->name, name, namelen); + ent->hash = hash; + ent->next = nametable[hash % NAME_TABLE_SIZE]; + + nametable[hash % NAME_TABLE_SIZE] = ent; + + return ent; +} #define is_invalid_char(c) ((c) == '/' || (c) == '\0') #define rol32(x,y) (((x) << (y)) | ((x) >> (32 - (y)))) @@ -421,7 +452,6 @@ generate_obfuscated_name( uchar_t *name) { xfs_dahash_t hash; - name_ent_t *p; int dup = 0; uchar_t newname[NAME_MAX]; @@ -519,38 +549,31 @@ generate_obfuscated_name( * Search the name table to be sure we don't produce * a name that's already been used. */ - for (p = nametable[hash % NAME_TABLE_SIZE]; p; p = p->next) { - if (p->hash == hash && p->namelen == namelen && - !memcmp(p->name, newname, namelen)) - break; - } - if (p) + if (nametable_find(hash, namelen, newname)) dup++; else dup = 0; } while (dup && dup < DUP_MAX); - /* Use the original name if we got too many dups. */ - - newp = dup ? name : newname; - - /* Create an entry for the name in the name table */ - - p = malloc(sizeof(name_ent_t) + namelen); - if (p == NULL) + /* + * Create an entry for the name in the name table. Use the + * original name if we got too many dups. + */ + if (! nametable_add(hash, namelen, dup ? name : newname)) return; - p->namelen = namelen; - memcpy(p->name, newp, namelen); - p->hash = hash; - p->next = nametable[hash % NAME_TABLE_SIZE]; - - nametable[hash % NAME_TABLE_SIZE] = p; - - /* Update the caller's copy with the obfuscated name */ - - if (newp != name) - memcpy(name, newp, namelen); + /* + * Update the caller's copy with the obfuscated name. + * Warn if we previously managed to create an obfuscated + * name that matches the one we're working on. + */ + if (! dup) + memcpy(name, newname, namelen); + else if (nametable_find(hash, namelen, newname)) + print_warning("duplicate name \"%s\" for inode %llu " + "in dir inode %llu\n", + name, (unsigned long long) ino, + (unsigned long long) cur_ino); } static void @@ -1253,7 +1276,7 @@ process_inode( break; default: ; } - clear_nametable(); + nametable_clear(); /* copy extended attributes if they exist and forkoff is valid */ if (success && XFS_DFORK_DSIZE(dip, mp) < XFS_LITINO(mp)) { @@ -1272,7 +1295,7 @@ process_inode( success = process_btinode(dip, TYP_ATTR); break; } - clear_nametable(); + nametable_clear(); } return success; } @@ -1675,12 +1698,6 @@ metadump_f( metablock->mb_blocklog = BBSHIFT; metablock->mb_magic = cpu_to_be32(XFS_MD_MAGIC); - if (!create_nametable()) { - print_warning("memory allocation failure"); - free(metablock); - return 0; - } - block_index = (__be64 *)((char *)metablock + sizeof(xfs_metablock_t)); block_buffer = (char *)metablock + BBSIZE; num_indicies = (BBSIZE - sizeof(xfs_metablock_t)) / sizeof(__be64); @@ -1690,7 +1707,6 @@ metadump_f( if (strcmp(argv[optind], "-") == 0) { if (isatty(fileno(stdout))) { print_warning("cannot write to a terminal"); - free(nametable); free(metablock); return 0; } @@ -1699,7 +1715,6 @@ metadump_f( outf = fopen(argv[optind], "wb"); if (outf == NULL) { print_warning("cannot create dump file"); - free(nametable); free(metablock); return 0; } @@ -1736,7 +1751,6 @@ metadump_f( while (iocur_sp > start_iocur_sp) pop_cur(); - free(nametable); free(metablock); return 0; From aelder@sgi.com Thu Dec 30 14:40:55 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from relay.sgi.com (relay3.corp.sgi.com [198.149.34.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUKetDR029375 for ; Thu, 30 Dec 2010 14:40:55 -0600 Received: from cf--amer001e--3.americas.sgi.com (cf--amer001e--3.americas.sgi.com [137.38.100.5]) by relay3.corp.sgi.com (Postfix) with ESMTP id E1BE6AC012 for ; Thu, 30 Dec 2010 12:42:59 -0800 (PST) Received: from [127.0.0.1] ([128.162.232.50]) by cf--amer001e--3.americas.sgi.com with Microsoft SMTPSVC(6.0.3790.3959); Thu, 30 Dec 2010 14:42:59 -0600 Subject: [PATCH 12/12] xfsprogs: Drop a typedef in db/metadump.c From: Alex Elder Reply-To: aelder@sgi.com To: xfs@oss.sgi.com Content-Type: text/plain; charset="UTF-8" Date: Thu, 30 Dec 2010 14:42:59 -0600 Message-ID: <1293741779.2294.374.camel@doink> Mime-Version: 1.0 X-Mailer: Evolution 2.30.3 Content-Transfer-Encoding: 7bit X-OriginalArrivalTime: 30 Dec 2010 20:42:59.0582 (UTC) FILETIME=[254659E0:01CBA862] X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean Use struct name_ent rather than its typedef, and just drop the typedef entirely. Signed-off-by: Alex Elder --- db/metadump.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) Index: b/db/metadump.c =================================================================== --- a/db/metadump.c +++ b/db/metadump.c @@ -337,12 +337,12 @@ copy_free_cnt_btree( /* filename and extended attribute obfuscation routines */ -typedef struct name_ent { +struct name_ent { struct name_ent *next; xfs_dahash_t hash; int namelen; uchar_t name[1]; -} name_ent_t; +}; #define NAME_TABLE_SIZE 4096 @@ -352,7 +352,7 @@ static void nametable_clear(void) { int i; - name_ent_t *ent; + struct name_ent *ent; for (i = 0; i < NAME_TABLE_SIZE; i++) { while ((ent = nametable[i])) { From SRS0+7eIB+33+fromorbit.com=david@internode.on.net Thu Dec 30 16:33:26 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUMXPSG041223 for ; Thu, 30 Dec 2010 16:33:25 -0600 X-ASG-Debug-ID: 1293748520-66bd00690000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id E8C4AF920B4 for ; Thu, 30 Dec 2010 14:35:20 -0800 (PST) Received: from mail.internode.on.net (bld-mail17.adl2.internode.on.net [150.101.137.102]) by cuda.sgi.com with ESMTP id t0XeCVCqPqkc4CCC for ; Thu, 30 Dec 2010 14:35:20 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 51223106-1927428 for multiple; Fri, 31 Dec 2010 09:05:18 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PYR5Z-0001S3-1P; Fri, 31 Dec 2010 09:35:17 +1100 Date: Fri, 31 Dec 2010 09:35:16 +1100 From: Dave Chinner To: Alex Elder Cc: XFS Mailing List X-ASG-Orig-Subj: Re: [PATCH 1/5] percpu_counter: fix test in __percpu_counter_add_unless_lt() Subject: Re: [PATCH 1/5] percpu_counter: fix test in __percpu_counter_add_unless_lt() Message-ID: <20101230223516.GB15179@dastard> References: <1293076575.2408.425.camel@doink> <20101223060652.GE18264@dastard> <1293656188.1961.470.camel@doink> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1293656188.1961.470.camel@doink> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail17.adl2.internode.on.net[150.101.137.102] X-Barracuda-Start-Time: 1293748522 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50967 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Wed, Dec 29, 2010 at 02:56:28PM -0600, Alex Elder wrote: > On Thu, 2010-12-23 at 17:06 +1100, Dave Chinner wrote: > > On Wed, Dec 22, 2010 at 09:56:15PM -0600, Alex Elder wrote: > > > In __percpu_counter_add_unless_lt(), there is a test to see if > > > a call to __percpu_counter_add() can be made, knowing the result > > > will not be less than the given threshhold and the called function > > > will do the addition without taking a lock. > > . . . > > > > =================================================================== > > > --- a/lib/percpu_counter.c > > > +++ b/lib/percpu_counter.c > > > @@ -239,10 +239,10 @@ int __percpu_counter_add_unless_lt(struc > > > goto out; > > > > > > /* > > > - * If the counter is over the threshold and the change is less than the > > > - * batch size, we might be able to avoid locking. > > > + * If the updated counter will be over the threshold we know > > > + * we can safely add, and might be able to avoid locking. > > > */ > > > - if (count > threshold + error && abs(amount) < batch) { > > > + if (count + amount > threshold + error) { > > > __percpu_counter_add(fbc, amount, batch); > > > ret = 1; > > > goto out; > > > > What you have is what I first implemented following your exact > > logic. However, after having several assert failures n the XFS code, > > I realised that the logic fails when there are concurrent modifications > > with abs(amount) > batch. To demonstrate, take the initial conditions: > > I think we're both wrong. First I'll point out a think-o > you did, then I'll lay out a counterexample to your approach. Argh, you're right. However, if you change amount to -49 and the initial fbc->count to 306, we get 226, 146, 66, -14, so the problem I was pointing out still stands. > > And we've just blown through the threshold. We modified the counter > > and pushed the result less than the threshold which we are not > > supposed to be, and worst yet is the fact we returning a positive > > number indicating that we _didn't_ bust the threshold. > > Now here's an example that will fail with your version, which is: > > if (count > threshold + error && abs(amount) < batch) { > __percpu_counter_add(fbc, amount, batch); > > My example is not symmetric like yours is. > > threshold = 0 > batch = 32 > 4 cpus, so (your) error = 2 * 4 * 32 = 256 > > We'll start with 0 for all per-cpu counter values > for simplicity, but we'll not assume that the > amount being added by all CPU's is the same. So > here are both the current per-cpu counter values and > the amount each racing CPU is going to try to add. > > fbc->count = 257 > CPU 0 1 2 3 > value 0 0 0 0 > amount -31 -76 -76 -76 Granted, that is a possible state that can occur at the sampling point, but it assumes that the race condition of CPUs 1, 2 and 3 complete the fbc->count modification before seeing the CPU 0 modification of the local CPU value can occur. I don't think that race condition can occur, because CPUs 1, 2 and 3 will take the slow path because abs(amount) >= batch and serialise on the fbc->lock, whilst CPU 0 will not be serialised, is running under preempt_disable() and so should complete first.... > The real problem is that we're caching the value of > fbc->count, and as soon as we've done that it > could be out of date. To get around it we need > to examine it under lock--preferably a reader/writer > lock I suppose. No, new locks are not an option. The point of percpu counters is to avoid locking where possible. memory barriers, OTOH.... > You'll notice that fbc->count is > only ever read under the protection of the spinlock > everywhere else in the file. It isn't, in fact. percpu_counter_read(), for example. > Locking is avoided > only when checking whether it is possible to add to > a per-cpu value, and that is done with preemption > disabled. Sure, that's the rules for using per-cpu data structures (i.e. preemption needs to be disabled). That doesn't mean we can't avoid locking where possible.... > I have a little more below. > > > Analysis of the failures lead me to this lead me to this logic > > for the unlocked check in my proposed patch: > > > > We can do unlocked modifications concurrently on all CPUs IFF > > > > 1. the code cannot be preempted between sampling fbc->count > > and calling __percpu_counter_add() > > This I agree with (you convinced me in your response > to my patch 5/5). > > > 2. -batch < amount < batch > > This isn't right, or maybe just isn't relevant. The > reason is that it neither takes into account this CPU's > counter value, nor what a concurrent call on the other > CPU's might be adding to the net value. It is supposed to take into account whether the local addition will transgress the error bound for this CPU.... > > 3. the error bound is set to 2 * batch * nr_cpus > > I think this assumes that all the CPU's are adding a limited > amount to the counter. And I still think you're doubling > the error bound unnecessarily (but that may reflect the > implied limit). It is the limit that is supposed to take into account the current counter and the amount being added. I think this the the cause of the issue - the error doesn't correctly take into account amount - it assumes that -batch < amount < batch is always true. We can change the error bound to take amount into account, but that still doesn't work if another CPU is adding a larger abs(amount). So for it to work in all cases we need to set a maximum bound on amount, which is impractical. However, I think this error bound is still valid if we modify the lockless code to detect if fbc->count has changed before we make the modification. It's only when fbc->count changes that the error bound is invalidated if abs(amount) < batch, so checking that it hasn't changed before applying the modification seems to solve the problem to me. And rather than using locking, we can use memory barriers to ensure that we pick up any racing changes to fbc->count. i.e something like: restart: smp_mb(); count = fbc->count; if (count > threshold + error && abs(amount) < batch) { s64 lcount; pcount = this_cpu_ptr(fbc->counters); lcount = *pcount + amount; if (lcount >= batch || lcount <= -batch) { spin_lock(&fbc->lock); if (fbc->count != count) { /* raced with other modifications */ spin_unlock(&fbc->lock); goto restart; } fbc->count += lcount; *pcount = 0; spin_unlock(&fbc->lock); } else { smp_mb(); if (fbc->count != count) goto restart; *pcount = lcount; } ret = 1; got out; } This means that in your example (and indeed any example where fbc->count is modified directly on another CPU), we will detect it and redo the unlocked checks. > Below I have a version of the code that I think would work, > but it unfortunately requires a lock in the (presumably) > normal case. Which, unfortunately, defeats the primary purpose of using a percpu counter in the first place (i.e. to reduce lock contention on a global counter) and so if that is the best that can be done, there is no point making any change. Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+ix8d+33+fromorbit.com=david@internode.on.net Thu Dec 30 17:11:54 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00 autolearn=ham version=3.4.0-r929098 Received: from cuda.sgi.com (cuda2.sgi.com [192.48.176.25]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBUNBsrj045715 for ; Thu, 30 Dec 2010 17:11:54 -0600 X-ASG-Debug-ID: 1293750836-013f01a80000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 050E6229FC8 for ; Thu, 30 Dec 2010 15:13:57 -0800 (PST) Received: from mail.internode.on.net (bld-mail15.adl6.internode.on.net [150.101.137.100]) by cuda.sgi.com with ESMTP id 33jBSSSTv6OtWPfa for ; Thu, 30 Dec 2010 15:13:57 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 40023015-1927428 for multiple; Fri, 31 Dec 2010 09:43:55 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PYRgw-0001Us-1c; Fri, 31 Dec 2010 10:13:54 +1100 Date: Fri, 31 Dec 2010 10:13:53 +1100 From: Dave Chinner To: Ajeet Yadav Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: XFS handling of synchronous buffers in case of EIO error Subject: Re: XFS handling of synchronous buffers in case of EIO error Message-ID: <20101230231353.GC15179@dastard> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail15.adl6.internode.on.net[150.101.137.100] X-Barracuda-Start-Time: 1293750839 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50968 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Thu, Dec 30, 2010 at 05:58:36PM +0530, Ajeet Yadav wrote: > Kernel: 2.6.30.9 > > I am trouble shooting a hang in XFS during umount. > Test scenerio: Copy large number of files files using below script, and > remove the USB after 3-5 second FWIW, in future can you please report what kernel you are testing on? > > index=0 > while [ "$?" == 0 ] > do > index=$((index+1)) > sync > cp $1/1KB.txt $2/"$index".test > done > > In rare scenerio during USB unplug the umount process hang at xfs_buf_lock. > Below log shows the hung process > > We have put printk to buffer handling functions xfs_buf_iodone_callbacks(), > xfs_buf_error_relse(), xfs_buf_relse() and xfs_buf_rele() > > We always observed the hang only comes when bp->b_relse = > xfs_buf_error_relse(). i.e when xfs_buf_iodone_callbacks() execute > XFS_BUF_SET_BRELSE_FUNC(bp,xfs_buf_error_relse); > XFS_BUF_DONE(bp); > XFS_BUF_FINISH_IOWAIT(bp); > > buf its never called by xfs_buf_relse() because b_hold = 3. > > Also we have seen that this problem always comes when bp->relse != NULL && > bp->hold > 1. This appears to be the same problem as reported here: http://oss.sgi.com/archives/xfs/2010-12/msg00380.html > I do not know whether below prints will help you, but I have taken printk > for super block buffer tracing > S-functionname ( Start of function) > E-functionname (End of function) If you have a recent enough kernel, you can get all this information from the tracing built into XFS. As it is, the cause of the problem is that setting bp->b_relse changes the behaviour of xfs_buf_relse() - if bp->b_relse is set, it doesn't unlock the buffer. This is normally just fine, because xfs_buf_rele() has a special case to handle buffers with bp->b_relse(), which adds a hold count and call the release function when the hold count drops to zero. The b_relse function is supposed to unlock the buffer by calling xfs_buf_relse() again. Unfortunately, the superblock buffer is special - the hold count on it never drops to zero until very late in the unmont process because it is managed by the filesystem. Hence the bp->b_relse function is never called, and hence the buffer is never unlocked in this case. Hence future attempts to access it hang. I'll need to think about this one for a bit... Cheers, Dave. -- Dave Chinner david@fromorbit.com From SRS0+CcnX+34+fromorbit.com=david@internode.on.net Thu Dec 30 18:11:24 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,J_CHICKENPOX_53 autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBV0BN9c053641 for ; Thu, 30 Dec 2010 18:11:24 -0600 X-ASG-Debug-ID: 1293754406-69e902ff0000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail.internode.on.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id A6B1AF92310 for ; Thu, 30 Dec 2010 16:13:26 -0800 (PST) Received: from mail.internode.on.net (bld-mail16.adl2.internode.on.net [150.101.137.101]) by cuda.sgi.com with ESMTP id BRpcVFuDcSoAnoOK for ; Thu, 30 Dec 2010 16:13:26 -0800 (PST) Received: from dastard (unverified [121.44.88.148]) by mail.internode.on.net (SurgeMail 3.8f2) with ESMTP id 51385261-1927428 for multiple; Fri, 31 Dec 2010 10:43:25 +1030 (CDT) Received: from dave by dastard with local (Exim 4.72) (envelope-from ) id 1PYScV-0001aH-Ca; Fri, 31 Dec 2010 11:13:23 +1100 Date: Fri, 31 Dec 2010 11:13:23 +1100 From: Dave Chinner To: Petre Rodan Cc: xfs@oss.sgi.com X-ASG-Orig-Subj: Re: xfssyncd and disk spin down Subject: Re: xfssyncd and disk spin down Message-ID: <20101231001323.GD15179@dastard> References: <20101223165532.GA23813@peter.simplex.ro> <20101227021904.GA24828@dastard> <20101227061629.GA2275@pandora.simplex.ro> <20101227140750.GB24828@dastard> <20101227171939.GA7759@pandora.simplex.ro> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20101227171939.GA7759@pandora.simplex.ro> User-Agent: Mutt/1.5.20 (2009-06-14) X-Barracuda-Connect: bld-mail16.adl2.internode.on.net[150.101.137.101] X-Barracuda-Start-Time: 1293754407 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests= X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50973 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean On Mon, Dec 27, 2010 at 07:19:39PM +0200, Petre Rodan wrote: > > Hello Dave, > > On Tue, Dec 28, 2010 at 01:07:50AM +1100, Dave Chinner wrote: > > Turn on the XFS tracing so we can see what is being written every > > 36s. When the problem shows up: > > > > # echo 1 > /sys/kernel/debug/tracing/events/xfs/enable > > # sleep 100 > > # cat /sys/kernel/debug/tracing/trace > trace.out > > # echo 0 > /sys/kernel/debug/tracing/events/xfs/enable > > > > And post the trace.out file for us to look at. > > attached. > > you can disregard all the lvm partitions ('dev 254:.*') since they are on a different drive, probably only 8:17 is of interest. Ok, I can see the problem. The original patch I tested: http://oss.sgi.com/archives/xfs/2010-08/msg00026.html Made the log covering dummy transaction a synchronous transaction so that the log was written and the superblock unpinned immediately to allow the xfsbufd to write back the superblock and empty the AIL before the next log covering check. On review, the log covering dummy transaction got changed to an async transaction, so the superblock buffer is not unpinned immediately. This was the patch committed: http://oss.sgi.com/archives/xfs/2010-08/msg00197.html As a result, the success of log covering and idling is then dependent on whether the log gets written to disk to unpin the superblock buffer before the next xfssyncd run. It seems that there is a large chance that this log write does not happen, so the filesystem never idles correctly. I've reproduced it here, and only in one test out of ten did the filesystem enter an idle state correctly. I guess I was unlucky enough to hit that 1-in-10 case when I tested the modified patch. I'll cook up a patch to make the log covering behave like the original patch I sent... Cheers, Dave. -- Dave Chinner david@fromorbit.com From ajeet.yadav.77@gmail.com Fri Dec 31 00:45:10 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=BAYES_00,FREEMAIL_FROM, HTML_MESSAGE,T_DKIM_INVALID autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBV6jAJF106066 for ; Fri, 31 Dec 2010 00:45:10 -0600 X-ASG-Debug-ID: 1293778033-20f102080000-NocioJ X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mail-vw0-f53.google.com (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 31A2C1D065A8 for ; Thu, 30 Dec 2010 22:47:13 -0800 (PST) Received: from mail-vw0-f53.google.com (mail-vw0-f53.google.com [209.85.212.53]) by cuda.sgi.com with ESMTP id bM8OzHKPu82JLRPS for ; Thu, 30 Dec 2010 22:47:13 -0800 (PST) Received: by vws8 with SMTP id 8so5098395vws.26 for ; Thu, 30 Dec 2010 22:47:13 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:received:in-reply-to :references:date:message-id:subject:from:to:cc:content-type; bh=7O+xbaO6NV4G+eP6UxxVE6TSItVt4L1mEDcipT9Osdc=; b=wKvxouhKayHDn59RTZRSIWbC4ftgsO+dw3fZe9rDp7KK5v8tLVuFZECSMFPUfDZKRo 1HbNH150jmTVOxUbE0d8qV6Y+8VNudWS4L2mlsmnMc1KAnTP1fl5M/ZK0Kqr80RfiqQX m/1DzLzGgoJthM4qQOCfffOGjpy/FCMoMt3VI= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:in-reply-to:references:date:message-id:subject:from:to :cc:content-type; b=wbXIqjeUo0K7HtvLiFFW+Uum7/8btw/GIf0V6H9oSYUloSGxcPzI6FFa7dV5cGccMv KgNULnQWlTqKu9HknjctW/3db2msvM/YESNn8TsxCsOm+4FbTfV4TJzumsLWVReOy+SA 52phtERrXHbS+XfB2hayTKooY/gmU+zbvwFuo= MIME-Version: 1.0 Received: by 10.220.91.198 with SMTP id o6mr5123158vcm.22.1293778032909; Thu, 30 Dec 2010 22:47:12 -0800 (PST) Received: by 10.220.165.198 with HTTP; Thu, 30 Dec 2010 22:47:12 -0800 (PST) In-Reply-To: <20101230231353.GC15179@dastard> References: <20101230231353.GC15179@dastard> Date: Fri, 31 Dec 2010 12:17:12 +0530 Message-ID: X-ASG-Orig-Subj: Re: XFS handling of synchronous buffers in case of EIO error Subject: Re: XFS handling of synchronous buffers in case of EIO error From: Ajeet Yadav To: Dave Chinner Cc: xfs@oss.sgi.com Content-Type: multipart/alternative; boundary=001485f8732a11de170498af2cd5 X-Barracuda-Connect: mail-vw0-f53.google.com[209.85.212.53] X-Barracuda-Start-Time: 1293778034 X-Barracuda-Bayes: INNOCENT GLOBAL 0.0000 1.0000 -2.0210 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: -2.02 X-Barracuda-Spam-Status: No, SCORE=-2.02 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=DKIM_SIGNED, DKIM_VERIFIED, HTML_MESSAGE X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.50997 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- -0.00 DKIM_VERIFIED Domain Keys Identified Mail: signature passes verification 0.00 DKIM_SIGNED Domain Keys Identified Mail: message has a signature 0.00 HTML_MESSAGE BODY: HTML included in message X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean --001485f8732a11de170498af2cd5 Content-Type: text/plain; charset=ISO-8859-1 Dear Dave, Our Kernel is 2.6.30.9 but XFS is backported from 2.6.34. But I have seen similar behaviour in another post related to process ls hang in 2.6.35.9 * http://oss.sgi.com/pipermail/xfs/2010-December/048691.html *I have always seen the hang problem comes only if comes when b_relse != NULL, and b_hold > 2 I have made below workaround it solved the problem in our case because when USB is removed we know we get EIO error. But I think we need to review xfs_buf_error_relse() and xfs_buf_relse() considering XBF_LOCK flow path. @@ -1047,9 +1047,19 @@ xfs_buf_iodone_callbacks( /* We actually overwrite the existing b-relse function at times, but we're gonna be shutting down anyway. */ - XFS_BUF_SET_BRELSE_FUNC(bp,xfs_buf_error_relse); - XFS_BUF_DONE(bp); - XFS_BUF_FINISH_IOWAIT(bp); + if (XFS_BUF_GETERROR(bp) == EIO){ + ASSERT(XFS_BUF_TARGET(bp) == mp->m_ddev_targp); + XFS_BUF_SUPER_STALE(bp); + trace_xfs_buf_item_iodone(bp, _RET_IP_); + xfs_buf_do_callbacks(bp, lip); + XFS_BUF_SET_FSPRIVATE(bp, NULL); + XFS_BUF_CLR_IODONE_FUNC(bp); + xfs_biodone(bp); + } else { + XFS_BUF_SET_BRELSE_FUNC(bp,xfs_buf_error_relse); + XFS_BUF_DONE(bp); + XFS_BUF_FINISH_IOWAIT(bp); + } } return; } Dec 31, 2010 at 4:43 AM, Dave Chinner wrote: > On Thu, Dec 30, 2010 at 05:58:36PM +0530, Ajeet Yadav wrote: > > Kernel: 2.6.30.9 > > > > I am trouble shooting a hang in XFS during umount. > > Test scenerio: Copy large number of files files using below script, and > > remove the USB after 3-5 second > > FWIW, in future can you please report what kernel you are testing on? > > > > > index=0 > > while [ "$?" == 0 ] > > do > > index=$((index+1)) > > sync > > cp $1/1KB.txt $2/"$index".test > > done > > > > In rare scenerio during USB unplug the umount process hang at > xfs_buf_lock. > > Below log shows the hung process > > > > We have put printk to buffer handling functions > xfs_buf_iodone_callbacks(), > > xfs_buf_error_relse(), xfs_buf_relse() and xfs_buf_rele() > > > > We always observed the hang only comes when bp->b_relse = > > xfs_buf_error_relse(). i.e when xfs_buf_iodone_callbacks() execute > > XFS_BUF_SET_BRELSE_FUNC(bp,xfs_buf_error_relse); > > XFS_BUF_DONE(bp); > > XFS_BUF_FINISH_IOWAIT(bp); > > > > buf its never called by xfs_buf_relse() because b_hold = 3. > > > > Also we have seen that this problem always comes when bp->relse != NULL > && > > bp->hold > 1. > > This appears to be the same problem as reported here: > > http://oss.sgi.com/archives/xfs/2010-12/msg00380.html > > > > I do not know whether below prints will help you, but I have taken printk > > for super block buffer tracing > > S-functionname ( Start of function) > > E-functionname (End of function) > > If you have a recent enough kernel, you can get all this information > from the tracing built into XFS. > > As it is, the cause of the problem is that setting bp->b_relse > changes the behaviour of xfs_buf_relse() - if bp->b_relse is set, it > doesn't unlock the buffer. This is normally just fine, because > xfs_buf_rele() has a special case to handle buffers with > bp->b_relse(), which adds a hold count and call the release function > when the hold count drops to zero. The b_relse function is supposed > to unlock the buffer by calling xfs_buf_relse() again. > > Unfortunately, the superblock buffer is special - the hold count on > it never drops to zero until very late in the unmont process because > it is managed by the filesystem. Hence the bp->b_relse function is > never called, and hence the buffer is never unlocked in this case. > Hence future attempts to access it hang. > > I'll need to think about this one for a bit... > > Cheers, > > Dave. > -- > Dave Chinner > david@fromorbit.com > --001485f8732a11de170498af2cd5 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable
Dear Dave,
=A0
Our Kernel is 2.6.30.9 but XFS is backported from 2.6.34.
But I have seen similar behaviour in another post related to=A0process= ls hang in 2.6.35.9

h= ttp://oss.sgi.com/pipermail/xfs/2010-December/048691.html

I have always seen the hang problem comes=A0only i= f comes when b_relse !=3D NULL, and b_hold > 2=A0

I have made below=A0workaround it solved the problem in our case because= =A0when USB is removed we know we get EIO error.

But I think we need to review xfs_buf_error_relse() and xfs_buf_relse() = considering =A0XBF_LOCK flow path.

@@ -1047,9 +1047,19 @@ xfs_buf_iodone_callbacks(
=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /* We actually overwrit= e the existing b-relse
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 function at times, but we're gonna be sh= utting down
=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0 anyway. */
-=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 XFS_BUF= _SET_BRELSE_FUNC(bp,xfs_buf_error_relse);
-=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 XFS_BUF_DONE(bp);
-=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 XFS_BUF_FINISH_IOWAI= T(bp);
+=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0 if (XFS_BUF_GETERROR(bp) =3D=3D EIO){
+=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0 ASSERT(XFS_BUF_TARGET(bp) =3D=3D mp->m_ddev_targp);+=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0 XFS_BUF_SUPER_STALE(bp);
+=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 trace_xfs_b= uf_item_iodone(bp, _RET_IP_);
+=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0 xfs_buf_do_callbacks(bp, lip);
+=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 XFS_B= UF_SET_FSPRIVATE(bp, NULL);
+=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 XFS_BUF_CLR_IODONE_FUNC(bp= );
+=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0 xfs_biodone(bp);
+=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 } else = {
+=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0 XFS_BUF_SET_BRELSE_FUNC(bp,xfs_buf_error_relse);
+= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0 XFS_BUF_DONE(bp);
+=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 XFS_BUF_FINISH_IOWAI= T(bp);
+=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 }
= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 }
=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0 return;
=A0=A0=A0=A0=A0=A0=A0 }

=A0

=A0Dec 31, 2010 at 4:43 AM, Dave Chinner <david@fromorbit.com&g= t; wrote:

On Thu, Dec 30, 2010 at 05:58:36PM +0530, Ajeet Yadav wrote:
> K= ernel: 2.6.30.9
>
> I am trouble shooting a hang in XFS during = umount.
> Test scenerio: Copy large number of files files using below= script, and
> remove the USB after 3-5 second

FWIW, in future can you p= lease report what kernel you are testing on?

>
> index=3D0
> while [ "$?" =3D=3D 0 ]> do
> =A0 =A0 =A0 =A0 index=3D$((index+1))
> =A0 =A0 =A0 = =A0 sync
> =A0 =A0 =A0 =A0 cp $1/1KB.txt $2/"$index".test> done
>
> In rare scenerio during USB unplug the umount p= rocess hang at xfs_buf_lock.
> Below log shows the hung process
>
> We have put printk to= buffer handling functions xfs_buf_iodone_callbacks(),
> xfs_buf_erro= r_relse(), xfs_buf_relse() and xfs_buf_rele()
>
> We always obs= erved the hang only comes when bp->b_relse =3D
> xfs_buf_error_relse(). i.e when xfs_buf_iodone_callbacks() execute
= > XFS_BUF_SET_BRELSE_FUNC(bp,xfs_buf_error_relse);
> XFS_BUF_DONE(= bp);
> XFS_BUF_FINISH_IOWAIT(bp);
>
> =A0buf its never ca= lled by xfs_buf_relse() because b_hold =3D 3.
>
> Also we have seen that this problem always comes when bp->r= else !=3D NULL &&
> bp->hold > 1.

This app= ears to be the same problem as reported here:

http://oss.sg= i.com/archives/xfs/2010-12/msg00380.html


> I do not know whether below prints will help you, but I h= ave taken printk
> for super block buffer tracing
> S-functionn= ame ( Start of function)
> E-functionname (End of function)

If you have a recent enough kernel, you can get all this information<= br>from the tracing built into XFS.

As it is, the cause of the probl= em is that setting bp->b_relse
changes the behaviour of xfs_buf_relse= () - if bp->b_relse is set, it
doesn't unlock the buffer. This is normally just fine, because
xfs_b= uf_rele() has a special case to handle buffers with
bp->b_relse(), wh= ich adds a hold count and call the release function
when the hold count = drops to zero. The b_relse function is supposed
to unlock the buffer by calling xfs_buf_relse() again.

Unfortunately= , the superblock buffer is special - the hold count on
it never drops to= zero until very late in the unmont process because
it is managed by the= filesystem. =A0Hence the bp->b_relse function is
never called, and hence the buffer is never unlocked in this case.
Hence= future attempts to access it hang.

I'll need to think about thi= s one for a bit...

Cheers,

Dave.
-= -
Dave Chinner
da= vid@fromorbit.com

--001485f8732a11de170498af2cd5-- From mailman-bounces@mb2d91.vdrs.net Fri Dec 31 16:53:39 2010 X-Spam-Checker-Version: SpamAssassin 3.4.0-r929098 (2010-03-30) on oss.sgi.com X-Spam-Level: **** X-Spam-Status: No, score=4.3 required=5.0 tests=BAYES_99,MIME_8BIT_HEADER autolearn=no version=3.4.0-r929098 Received: from cuda.sgi.com (cuda1.sgi.com [192.48.157.11]) by oss.sgi.com (8.14.3/8.14.3/SuSE Linux 0.8) with ESMTP id oBVMrdCj245071 for ; Fri, 31 Dec 2010 16:53:39 -0600 X-ASG-Debug-ID: 1293836142-3b8401010000-w1Z2WR X-Barracuda-URL: http://cuda.sgi.com:80/cgi-bin/mark.cgi Received: from mb2d91.vdrs.net (localhost [127.0.0.1]) by cuda.sgi.com (Spam Firewall) with ESMTP id 553541530B9F for ; Fri, 31 Dec 2010 14:55:42 -0800 (PST) Received: from mb2d91.vdrs.net (mb2d91.vdrs.net [112.78.2.91]) by cuda.sgi.com with ESMTP id TInq4GVLTz6JYTaB for ; Fri, 31 Dec 2010 14:55:42 -0800 (PST) Received: from localhost ([127.0.0.1] helo=mb2d91.vdrs.net) by mb2d91.vdrs.net with esmtp (Exim 4.69) (envelope-from ) id 1PYnsp-0007ee-S8 for linux-xfs@oss.sgi.com; Sat, 01 Jan 2011 05:55:39 +0700 MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 X-ASG-Orig-Subj: =?utf-8?b?TOG7nWkgbmjhuq9jIG5o4bufIHRow6BuaCB2acOqbiBo4buZcCB0?= =?utf-8?q?h=C6=B0_subishop=2Ecom?= Subject: =?utf-8?b?TOG7nWkgbmjhuq9jIG5o4bufIHRow6BuaCB2acOqbiBo4buZcCB0?= =?utf-8?q?h=C6=B0_subishop=2Ecom?= From: sanpham-owner@subishop.com To: linux-xfs@oss.sgi.com X-No-Archive: yes Message-ID: Date: Sat, 01 Jan 2011 05:16:18 +0700 Precedence: bulk X-BeenThere: mailman@mb2d91.vdrs.net X-Mailman-Version: 2.1.12.cp3 List-Id: Mailman site list X-List-Administrivia: yes Sender: mailman-bounces@mb2d91.vdrs.net Errors-To: mailman-bounces@mb2d91.vdrs.net X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - mb2d91.vdrs.net X-AntiAbuse: Original Domain - oss.sgi.com X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - mb2d91.vdrs.net X-Barracuda-Connect: mb2d91.vdrs.net[112.78.2.91] X-Barracuda-Start-Time: 1293836144 X-Barracuda-Bayes: INNOCENT GLOBAL 0.4449 1.0000 0.0000 X-Barracuda-Virus-Scanned: by cuda.sgi.com at sgi.com X-Barracuda-Spam-Score: 0.40 X-Barracuda-Spam-Status: No, SCORE=0.40 using per-user scores of TAG_LEVEL=2.0 QUARANTINE_LEVEL=1000.0 KILL_LEVEL=2.1 tests=BSF_SC0_SA085b, NO_REAL_NAME X-Barracuda-Spam-Report: Code version 3.2, rules version 3.2.2.51062 Rule breakdown below pts rule name description ---- ---------------------- -------------------------------------------------- 0.00 NO_REAL_NAME From: does not include a real name 0.40 BSF_SC0_SA085b Custom Rule SA085b X-Virus-Scanned: ClamAV version 0.94.2, clamav-milter version 0.94.2 on oss.sgi.com X-Virus-Status: Clean xJDDonkgbMOgIGzhu51pIG5o4bqvYyBuaOG7nywgxJHGsOG7o2MgZ+G7n2kgaMOgbmcgdGjDoW5n LCB24buBIHPhu7EKxJHEg25nIGvDvSBj4bunYSBi4bqhbiB24bubaSBo4buZcCB0aMawIGNodW5n IHRyw6puIG3DoXkgc3ViaXNob3AuY29tLgpOw7MgZ+G7k20gdGjDtG5nIHRpbiDEkcSDbmcga8O9 IGPhu6dhIGLhuqFuLCB2w6AgaMaw4bubbmcgZOG6q24gduG7gQp0aGF5IMSR4buVaSB0aMO0bmcg dGluIG7DoHkgdsOgIGjhu6d5IMSRxINuZyBrw70gcmEgaOG7mXAgdGjGsCBuw6BvLgoKQuG6oW4g Y8OzIHRo4buDIHRoxINtIMSR4buLYSBjaOG7iSBN4bqhbmcgxJHhu4MgdGhheSDEkeG7lWkgdHLh uqFuZwp0aMOhaSB0aMOgbmggdmnDqm4gaGF5IGPhuqV1IGjDrG5oLCBn4buTbSBo4buneSDEkcSD bmcga8O9LCDEkeG6t3QKbmjhuq1uIGLDsyB0aMawLCBob+G6t2MgdOG6r3QgdOG6oW0gdGjhu51p IG5o4bqtbiB0aMawICh2LmQuIGtoaSDEkWkKbmdo4buJKSB2LnYuCgpUaMOqbSB2w6BvIGto4bqj IG7Eg25nIHPhu60gZOG7pW5nIGdpYW8gZGnhu4duIE3huqFuZywgYuG6oW4gY8WpbmcgY8OzCmto 4bqjIG7Eg25nIHPhu60gZOG7pW5nIHRoxrAgxJFp4buHbiB04butIMSR4buDIHRoYXkgxJHhu5Vp IGfDrC4gxJDhu4MKxJHGsOG7o2MgdGjDtG5nIHRpbiB0aMOqbSwgaMOjeSBn4bufaSB0aMawIGNo byDEkeG7i2EgY2jhu4kgecOqdSBj4bqndQrCqyAtcmVxdWVzdCDCuyBj4bunYSBo4buZcCB0aMaw IMSRw7MgKHYuZC4Kc2FucGhhbS1yZXF1ZXN0QHN1YmlzaG9wLmNvbSkgbcOgIGNo4bupYSBjaOG7 iSB04burICJoZWxwIiAodHLhu6MKZ2nDunApIChraMO0bmcgY8OzIGThuqV1IHRyw61jaCBk4bqr bikgdHJvbmcgdGjDom4sIHLhu5NpIGLhuqFuIHPhur0Kbmjhuq1uIHRoxrAgaMaw4bubbmcgZOG6 q24uCgpN4buXaSBjw6J1IGjhu49pLCB24bqlbiDEkeG7gSwgY2jDuiB0aMOtY2ggdi52LiwgdnVp IGzDsm5nIGfhu59pIHRoxrAKY2hvIHNhbnBoYW0tb3duZXJAc3ViaXNob3AuY29tLiAgQ8OhbSDG oW4gYuG6oW4uCgpN4bqtdCBraOG6qXUgY2hvIGxpbnV4LXhmc0Bvc3Muc2dpLmNvbToKCkjhu5lw IHRoxrAgY2h1bmcgICAgICAgICAgICAgICAgICAgICAgICAgTeG6rXQga2jhuql1IC8vIMSQ4buL YSBjaOG7iSBVUkwKLS0tLSAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAtLS0t LS0tLSAgCnNhbnBoYW1Ac3ViaXNob3AuY29tICAgICAgICAgICAgICAgICAgICAgZWR2ZWJvcGEg IApodHRwOi8vc3ViaXNob3AuY29tL21haWxtYW4vb3B0aW9ucy9zYW5waGFtX3N1YmlzaG9wLmNv bS9saW51eC14ZnMlNDBvc3Muc2dpLmNvbQo=