lkml.org 
[lkml]   [2006]   [May]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
Subjectext3-fs transient corruption with devmapper over md raid, kernel 2.6.16.14

I just recently upgraded a machine to use devmapper for an encrypted
filesystem on top of a software raid5 array. System is running a
stock 2.6.16.14 kernel with no additional patches.

Under periods of high disk load on that array, I get various errors like the
following:

May 23 06:26:48 localhost kernel: EXT3-fs error (device dm-0): ext3_readdir: bad entry in directory #108298277: rec_len %% 4 != 0 - offset=0, inode=857743392, rec_len=12853, name_len=52
May 23 06:27:01 localhost kernel: EXT3-fs error (device dm-0): ext3_readdir: bad entry in directory #109215774: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
May 23 06:27:23 localhost kernel: EXT3-fs error (device dm-0): ext3_readdir: bad entry in directory #109232146: rec_len is smaller than minimal - offset=0, inode=0, rec_len=0, name_len=0
May 23 06:27:27 localhost kernel: EXT3-fs error (device dm-0): ext3_readdir: bad entry in directory #109282688: rec_len is smaller than minimal - offset=0, inode=1048832, rec_len=0, name_len=0
May 23 06:27:27 localhost kernel: EXT3-fs error (device dm-0): ext3_readdir: bad entry in directory #109297749: rec_len %% 4 != 0 - offset=0, inode=1309226288, rec_len=8303, name_len=67
May 23 06:28:07 localhost kernel: EXT3-fs error (device dm-0): ext3_readdir: bad entry in directory #109871722: rec_len %% 4 != 0 - offset=0, inode=6586752, rec_len=1581, name_len=0
May 23 06:28:21 localhost kernel: EXT3-fs error (device dm-0): ext3_readdir: bad entry in directory #110412086: rec_len is smaller than minimal - offset=0, inode=1048832, rec_len=0, name_len=0
May 23 06:28:23 localhost kernel: EXT3-fs error (device dm-0): ext3_readdir: bad entry in directory #110428194: rec_len is smaller than minimal - offset=0, inode=0, rec_len=1, name_len=0
May 23 06:28:24 localhost kernel: EXT3-fs error (device dm-0): ext3_readdir: bad entry in directory #110428301: rec_len %% 4 != 0 - offset=0, inode=1767526191, rec_len=13679, name_len=77
May 23 06:28:25 localhost kernel: EXT3-fs error (device dm-0): ext3_readdir: bad entry in directory #110444639: directory entry across blocks - offset=0, inode=538976288, rec_len=24892, name_len=32

After the errors occur, if I then unmount and fsck the devmapper device, it
finds no errors. If the disk load isn't heavy, the errors never seem to
crop up. There are no messages concerning the underlying md device or any
of the member disks of the md device.

This is not completely reproducible, but appears to be commonly triggered by
the nightly updatedb/find cronjob running concurrently with a hefty rsync
process on a filesystem with about 3 million files.

Other md devices on the same machine that are NOT used via devmapper are not
showing these problems.

System is running AMD64 stable distribution of Debian, using devmapper with
dm_crypt and aes_x86_64 kernel modules.

I found a couple of other similar reports via google, but most were pretty
old, and none seemed to have applicable resolutions.

Happy to provide any further info that may be useful.

Evan
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2006-05-23 20:29    [W:0.076 / U:0.292 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site