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INFO messages on resync

To: xfs@xxxxxxxxxxx
Subject: INFO messages on resync
From: Richard Scobie <richard@xxxxxxxxxxx>
Date: Mon, 23 Jun 2008 09:49:36 +1200
Sender: xfs-bounce@xxxxxxxxxxx
User-agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.7.2) Gecko/20040805 Netscape/7.2
Apologies for the probable off topic nature of this.

Have just updated a Fedora 9 system from 2.6.25.4-30.fc9.x86_64 to 2.6.25.6-55.fc9.x86_64 and resyncs on an md RAID6 array containing an XFS filesystem now generates these messages for the duration of the resync. Resyncs on previous kernel did not cause this.

INFO: task xfssyncd:30716 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
xfssyncd      D ffff8101b5cd4008     0 30716      2
 ffff8101c858dcb0 0000000000000046 0000000000000000 ffff81023d8ce6d8
 ffff8101c858dc10 ffffffff814b4e00 ffffffff814b4e00 ffff81023d8ce6d8
 ffff8101c858dc30 ffff8101b515c000 ffffffff813b9610 ffff8101b515c328
Call Trace:
 [<ffffffff8128ebf0>] __down+0xc5/0xd9
 [<ffffffff8102b55f>] ? default_wake_function+0x0/0xf
 [<ffffffff8128e8b3>] __down_failed+0x35/0x3a
 [<ffffffff8827e068>] ? :xfs:xfs_buf_lock+0x5b/0x60
 [<ffffffff8826eba2>] :xfs:xfs_getsb+0x2d/0x3d
 [<ffffffff88274207>] :xfs:xfs_trans_getsb+0x4c/0x8b
 [<ffffffff8826fb86>] :xfs:xfs_mod_sb+0x24/0x76
 [<ffffffff8826fc7d>] :xfs:xfs_log_sbcount+0xa5/0xce
 [<ffffffff882758c7>] :xfs:xfs_syncsub+0x14a/0x24a
 [<ffffffff88275a09>] :xfs:xfs_sync+0x42/0x47
 [<ffffffff88284d84>] :xfs:xfs_sync_worker+0x1f/0x41
 [<ffffffff88284d27>] :xfs:xfssyncd+0x144/0x182
 [<ffffffff88284be3>] ? :xfs:xfssyncd+0x0/0x182
 [<ffffffff810467eb>] kthread+0x49/0x76
 [<ffffffff8100ccf8>] child_rip+0xa/0x12
 [<ffffffff810467a2>] ? kthread+0x0/0x76
 [<ffffffff8100ccee>] ? child_rip+0x0/0x12

INFO: task pdflush:260 blocked for more than 120 seconds.
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
pdflush       D ffff81023d493af0     0   260      2
 ffff81023d493ae0 0000000000000046 0000000000000000 ffffffff81134771
 ffff81023d493a60 ffffffff814b4e00 ffffffff814b4e00 0000000000000009
 0000000000000000 ffff81023dc04000 ffff81023f10e000 ffff81023dc04328
Call Trace:
 [<ffffffff81134771>] ? list_add+0xc/0xf
 [<ffffffff811e4507>] md_write_start+0x105/0x11d
 [<ffffffff81046b0b>] ? autoremove_wake_function+0x0/0x38
 [<ffffffff880732eb>] :raid456:make_request+0x61/0x5e6
 [<ffffffff8107795b>] ? find_get_pages_tag+0x3d/0x96
 [<ffffffff8107fb6e>] ? pagevec_lookup_tag+0x22/0x2b
 [<ffffffff8111d29a>] generic_make_request+0x37e/0x3b9
 [<ffffffff8107a00b>] ? mempool_alloc+0x5b/0x113
 [<ffffffff8111d3b5>] submit_bio+0xe0/0xe9
 [<ffffffff8827e32f>] :xfs:_xfs_buf_ioapply+0x203/0x231
 [<ffffffff8827ee6b>] :xfs:xfs_buf_iorequest+0x41/0x6f
 [<ffffffff882828c1>] :xfs:xfs_bdstrat_cb+0x19/0x3b
 [<ffffffff8827b6b0>] :xfs:xfs_bwrite+0x5f/0xc0
 [<ffffffff882758a6>] :xfs:xfs_syncsub+0x129/0x24a
 [<ffffffff88275a09>] :xfs:xfs_sync+0x42/0x47
 [<ffffffff88283e24>] :xfs:xfs_fs_write_super+0x23/0x2c
 [<ffffffff810a562d>] sync_supers+0x61/0xa6
 [<ffffffff8107e982>] wb_kupdate+0x35/0x119
 [<ffffffff8107f344>] pdflush+0x133/0x1db
 [<ffffffff8107e94d>] ? wb_kupdate+0x0/0x119
 [<ffffffff8107f211>] ? pdflush+0x0/0x1db
 [<ffffffff810467eb>] kthread+0x49/0x76
 [<ffffffff8100ccf8>] child_rip+0xa/0x12
 [<ffffffff810467a2>] ? kthread+0x0/0x76
 [<ffffffff8100ccee>] ? child_rip+0x0/0x12

I realise they are "INFO" and not ERROR, but I am curious as to whether this is just a situation that was normal before and is now being logged, or whether this is indicative of an issue elsewhere?

Regards,

Richard


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