Re: Filesystem corruption

[Edward Shishkin <edward@namesys.com>]

Ingo Bormuth wrote:

>On 2007-06-03 03:10, Edward Shishkin wrote:
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>>Ingo Bormuth wrote:
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>>>Hm, same here. I lost /bin/sleep several times.
>>>      
>>>
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>>Would you please describe the problem in more details?
>>What kernel version? What does "I lost /bin/sleep" mean?
>>Does it mean that:
>>1. /bin/sleep was truncated to 0 bytes, i.e. "ls -l /bin/sleep" shows  
>>something like
>>-rwxr-xr-x  1 root root 0 2005-04-20 18:32 /bin/sleep
>>2. /bin/sleep disappeared ("ls -l /bin" doesn't show this file)
>>3. /bin/sleep exists, but filled by zeros
>>etc...
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>>
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>The file was removed by 'fsck.reiser4 --fix' which emmitted a
>message about deleting a corrupted file. (Case 2 in your list).
>
>This always happened after a system freeze or power loss.
>The machine freezes quite frequently - I think it has a DMA problem.
>Nevertheless I don't see how a file that was not written to can
>get corrupted.
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When performing mapping read (needed for execution, etc) reiser4 
converts small
files from tails to extents and back (your /bin/sleep is less then 4 * 
blocksize, right?)

>Current kernel is 2.6.20.5 (the reiser4 patch I submitted to this 
>list on may 2nd).
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Please, rebuild your kernel with the official patch
http://ftp.namesys.com/pub/reiser4-for-2.6/2.6.20/
It contains a bugfix related to tail conversion (races when acquiring 
exclusive access).

Please, report, if such data loss still takes place after upgrade.

Thanks,
Edward.

>Root is mounted rw,noatime,nodiratime,onerror=remount-ro,tmgr.atom_max_age=60
>
>Hope that helps.
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