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* fs corruption
@ 2011-04-12  9:33 stress_buster
  2011-04-12  9:49 ` Dave Chinner
  0 siblings, 1 reply; 6+ messages in thread
From: stress_buster @ 2011-04-12  9:33 UTC (permalink / raw)
  To: xfs


My dmesg output shows the below trace. It repeats over and over again.

XFS internal error XFS_WANT_CORRUPTED_GOTO at line 1545 of file
fs/xfs/xfs_alloc.c.  Caller 0xffffffff881a8961

Call Trace:
 [<ffffffff881a6e27>] :xfs:xfs_free_ag_extent+0x19e/0x67e
 [<ffffffff881a8961>] :xfs:xfs_free_extent+0xa9/0xc9
 [<ffffffff881d96cf>] :xfs:xlog_recover_process_efi+0x112/0x16c
 [<ffffffff881f31b4>] :xfs:xfs_fs_fill_super+0x0/0x3e4
 [<ffffffff881da8c2>] :xfs:xlog_recover_process_efis+0x4f/0x8d
 [<ffffffff881da914>] :xfs:xlog_recover_finish+0x14/0xad
 [<ffffffff881f31b4>] :xfs:xfs_fs_fill_super+0x0/0x3e4
 [<ffffffff881df420>] :xfs:xfs_mountfs+0x498/0x5e2
 [<ffffffff881dfb42>] :xfs:xfs_mru_cache_create+0x113/0x143
 [<ffffffff881f33b7>] :xfs:xfs_fs_fill_super+0x203/0x3e4
 [<ffffffff800e544f>] get_sb_bdev+0x10a/0x16c
 [<ffffffff800e4dec>] vfs_kern_mount+0x93/0x11a
 [<ffffffff800e4eb5>] do_kern_mount+0x36/0x4d
 [<ffffffff800ef2ed>] do_mount+0x6a9/0x719
 [<ffffffff80008d84>] __handle_mm_fault+0x5f2/0xfaa
 [<ffffffff80022127>] __up_read+0x19/0x7f
 [<ffffffff80067b88>] do_page_fault+0x4fe/0x874
 [<ffffffff8012c580>] inode_doinit_with_dentry+0x86/0x47c
 [<ffffffff800cd378>] zone_statistics+0x3e/0x6d
 [<ffffffff8000f2ff>] __alloc_pages+0x78/0x308
 [<ffffffff8004c9fd>] sys_mount+0x8a/0xcd
 [<ffffffff8005e116>] system_call+0x7e/0x83

Failed to recover EFIs on filesystem: cciss/c0d0
XFS: log mount finish failed

Can someone shed some light on what is happening here?

Also what the next steps I need to take to repair the fs? (assuming my xfs
fs is corrupted)
Will running xfs_repair be good enough in this case?

Thanks in advance
-- 
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^ permalink raw reply	[flat|nested] 6+ messages in thread
* Re: fs corruption
@ 2011-04-25  5:47 Leo Davis
  0 siblings, 0 replies; 6+ messages in thread
From: Leo Davis @ 2011-04-25  5:47 UTC (permalink / raw)
  To: Dave Chinner; +Cc: xfs


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Just to add if it helps- I find this logged by smart array controller:
Corrected ECC Error, Status=0x00000001 Addr=0x060f4e00
 
 

________________________________
From: Leo Davis <leo1783@yahoo.com>
To: Dave Chinner <david@fromorbit.com>
Cc: xfs@oss.sgi.com
Sent: Mon, April 25, 2011 9:55:02 AM
Subject: Re: fs corruption


Thank you for that :).

However,I've run into another fs corruption issue on my other server. I just 
thought I would use the same thread rather than opening new.

I was troublehooting a weird fiber channel issue ( logins going missing to my 
storage) when I noticed these backtraces in dmesg. 


Filesystem "cciss/c3d1p1": XFS internal error xfs_btree_check_lblock at line 186 
of file fs/xfs/xfs_btree.c. Caller 0xffffffff881b92d6
Call Trace:
[<ffffffff881bce83>] :xfs:xfs_btree_check_lblock+0xf4/0xfe
[<ffffffff881b92d6>] :xfs:xfs_bmbt_lookup+0x159/0x420
[<ffffffff881b41cc>] :xfs:xfs_bmap_add_extent_delay_real+0x62a/0x103a
[<ffffffff881a8cfa>] :xfs:xfs_alloc_vextent+0x379/0x3ff
[<ffffffff881b543a>] :xfs:xfs_bmap_add_extent+0x1fb/0x390
[<ffffffff881b7f34>] :xfs:xfs_bmapi+0x895/0xe79
[<ffffffff881d4082>] :xfs:xfs_iomap_write_allocate+0x201/0x328
[<ffffffff881d4b09>] :xfs:xfs_iomap+0x22a/0x2a5
[<ffffffff881e9ae3>] :xfs:xfs_map_blocks+0x2d/0x65
[<ffffffff881ea723>] :xfs:xfs_page_state_convert+0x2af/0x544
[<ffffffff881eab04>] :xfs:xfs_vm_writepage+0xa7/0xdf
[<ffffffff8001cef2>] mpage_writepages+0x1bf/0x37d
[<ffffffff881eaa5d>] :xfs:xfs_vm_writepage+0x0/0xdf
[<ffffffff8005b1ea>] do_writepages+0x20/0x2f
[<ffffffff8005000e>] __filemap_fdatawrite_range+0x50/0x5b
[<ffffffff80050717>] do_fsync+0x2f/0xa4
[<ffffffff800e1ce9>] __do_fsync+0x23/0x36
[<ffffffff8005e116>] system_call+0x7e/0x83
Filesystem "cciss/c3d1p1": XFS internal error xfs_trans_cancel at line 1164 of 
file fs/xfs/xfs_trans.c. Caller 0xffffffff881d4186
Call Trace:
[<ffffffff881e1b37>] :xfs:xfs_trans_cancel+0x55/0xfa
[<ffffffff881d4186>] :xfs:xfs_iomap_write_allocate+0x305/0x328
[<ffffffff881d4b09>] :xfs:xfs_iomap+0x22a/0x2a5
[<ffffffff881e9ae3>] :xfs:xfs_map_blocks+0x2d/0x65
[<ffffffff881ea723>] :xfs:xfs_page_state_convert+0x2af/0x544
[<ffffffff881eab04>] :xfs:xfs_vm_writepage+0xa7/0xdf
[<ffffffff8001cef2>] mpage_writepages+0x1bf/0x37d
[<ffffffff881eaa5d>] :xfs:xfs_vm_writepage+0x0/0xdf
[<ffffffff8005b1ea>] do_writepages+0x20/0x2f
[<ffffffff8005000e>] __filemap_fdatawrite_range+0x50/0x5b
[<ffffffff80050717>] do_fsync+0x2f/0xa4
[<ffffffff800e1ce9>] __do_fsync+0x23/0x36
[<ffffffff8005e116>] system_call+0x7e/0x83
xfs_force_shutdown(cciss/c3d1p1,0x8) called from line 1165 of file 
fs/xfs/xfs_trans.c. Return address = 0xffffffff881e1b50
Filesystem "cciss/c3d1p1": Corruption of in-memory data detected. Shutting down 
filesystem: cciss/c3d1p1
Please umount the filesystem, and rectify the problem(s)
Filesystem "cciss/c3d1p1": xfs_log_force: error 5 returned.
Filesystem "cciss/c3d1p1": xfs_log_force: error 5 returned.
 

Any thoughts on what the root cause might be?
- I've checked the underlying drives, array controller etc and all looks 
healthy; (indicating it is a fs issue for sure?)
I did the xfs_repair which corrected the issue but I'm worried as to how fs 
ended up in this state, this being a production box.

Thanks in advance.




________________________________
From: Dave Chinner <david@fromorbit.com>
To: Leo Davis <leo1783@yahoo.com>
Cc: xfs@oss.sgi.com
Sent: Tue, April 12, 2011 4:35:32 PM
Subject: Re: fs corruption

On Tue, Apr 12, 2011 at 03:51:20AM -0700, Leo Davis wrote:
> You have a corrupted free space btree.
> 
> Err... apologies for my ignorance, but what is a free space btree?

A tree that indexes the free space in the filesystem. Every time you
write a file or remove a file you are allocating or freeing space,
and these tree keep track of that free space.

If you want to know - at a high level - how XFS is structured (good
for understanding what a free space tree is), read this paper:

http://oss.sgi.com/projects/xfs/papers/xfs_usenix/index.html

It's from 1996, but still correct on all the major structural
details.

> I had serial trace from raid controller which i just checked and
> it logged some 'Loose cabling', but this was months back.....  not
> sure whether that can be the cause of this.. strange if that is
> the case since it's been a long time

it's possible that it took a couple of months to trip over a random
metadata corruption. I've seen that before in directory trees and
inode clusters where corruption is not detected until next time they
are read from disk....

Cheers,

Dave.
-- 
Dave Chinner
david@fromorbit.com

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^ permalink raw reply	[flat|nested] 6+ messages in thread
end of thread, other threads:[~2011-04-25  5:43 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2011-04-12  9:33 fs corruption stress_buster
2011-04-12  9:49 ` Dave Chinner
2011-04-12 10:51   ` Leo Davis
2011-04-12 11:05     ` Dave Chinner
2011-04-12 11:37       ` Emmanuel Florac
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2011-04-25  5:47 Leo Davis

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