Corruption of in-memory data detected - on heavy hard linking

[Christian Affolter <christian.affolter@stepping-stone.ch>]

Dear XFS users

While using rsnapshot [1] on an XFS filesystem I encountered the 
following error, which I can reproduce using the bash command below:

i=0; while (( $i <20 )); do
     rm -rf link-dir;
     cp -al orig-dir link-dir

     echo "Round $i over"; let i++;
done

The problem mostly happens between the 6th and 10th run.

"orig-dir" contains around 12 GB of data and around 40'000 files (the 
filesystem is 50 GB whereas 27 GB are free, mount options: 
rw,noatime,usrquota).

The problem doesn't occur with a reiserfs filesystem (on the same device).

Kernel-Error:
Filesystem "sdc1": XFS internal error xfs_trans_cancel at line 1163 of 
file fs/xfs/xfs_trans.c.  Caller 0xffffffff803a4fcf
Pid: 22816, comm: cp Not tainted 2.6.24-gentoo-r8 #1

Call Trace:
  [<ffffffff803a4fcf>] xfs_link+0x26f/0x390
  [<ffffffff8039c656>] xfs_trans_cancel+0x126/0x150
  [<ffffffff803a4fcf>] xfs_link+0x26f/0x390
  [<ffffffff8039cf4b>] xfs_trans_unlocked_item+0x3b/0x60
  [<ffffffff803aff8c>] xfs_vn_link+0x3c/0xb0
  [<ffffffff802952b3>] vfs_link+0x123/0x180
  [<ffffffff802984b1>] sys_linkat+0x151/0x180
  [<ffffffff802901b7>] cp_new_stat+0xe7/0x100
  [<ffffffff80290276>] sys_newlstat+0x36/0x50
  [<ffffffff8020bbce>] system_call+0x7e/0x83

xfs_force_shutdown(sdc1,0x8) called from line 1164 of file 
fs/xfs/xfs_trans.c.  Return address = 0xffffffff8039c66f
Filesystem "sdc1": Corruption of in-memory data detected.  Shutting down 
filesystem: sdc1
Please umount the filesystem, and rectify the problem(s)
xfs_force_shutdown(sdc1,0x1) called from line 420 of file 
fs/xfs/xfs_rw.c.  Return address = 0xffffffff803a7fe9
xfs_force_shutdown(sdc1,0x1) called from line 420 of file 
fs/xfs/xfs_rw.c.  Return address = 0xffffffff803a7fe9

After remounting, everything seems to be fine, even xfs_repair (xfsprogs 
2.8.11) doesn't find any problems on the filesystem.

The above error happens on a 2.6.24-gentoo-r8 SMP 64bit kernel with 4 GB 
of memory (~3G free), Intel 5000V chipset (ASUS DSBV-D), on top of a 
Areca ARC-1160 (V1.42) RAID controller.

According to memcheck the memory seems to be OK, anyway I replaced the 
DIMMs with no success.

Google leads to a lot of results, for the above error message, however I 
only found one forum entry [2] which seems to look similar.


Any help would be highly appreciated

Many thanks!
Chris


[1]http://www.rsnapshot.org/
[2]http://ubuntuforums.org/showthread.php?t=741425

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christian.affolter@stepping-stone.ch