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Re: XFS hangs

To: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>
Subject: Re: XFS hangs
From: Amit Sahrawat <amit.sahrawat83@xxxxxxxxx>
Date: Wed, 22 Dec 2010 14:42:03 +0530
Cc: xfs@xxxxxxxxxxx, Dave Chinner <david@xxxxxxxxxxxxx>, Eric Sandeen <sandeen@xxxxxxxxxxx>
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In-reply-to: <201012220904.56914@xxxxxx>
References: <AANLkTikOcJA5a6u2YDXVGAEY0CqKiATTF02VeBsSKtU0@xxxxxxxxxxxxxx> <20101222060254.GH4907@dastard> <201012220904.56914@xxxxxx>
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.
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
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.
- 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/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 1:34 PM, Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx> 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?


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

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