Re: PROBLEM: Filesystem became readonly, then kernel crashes on shutdown

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Hi,

On Thu, 2004-01-22 at 10:21, Mike McCormack wrote:

> Yeah, it looks like I missed a bunch of messages in /var/log/syslog... 
> see the attached trace.
> 
> The trouble appears to have started with this message:
> Jan 22 01:52:42 kimchi kernel: EXT3-fs warning (device hda2): 
> ext3_unlink: Deleting nonexistent file (2874981), 0

The first error here is:

> Jan 18 16:16:12 kimchi kernel: Unable to handle kernel paging request at virtual address 00200014
> Jan 18 16:16:12 kimchi kernel: EIP:    0060:[<c016ba37>]    Not tainted
> Jan 18 16:16:12 kimchi kernel: EIP is at prune_dcache+0x177/0x200
> Jan 18 16:16:12 kimchi kernel: eax: 00200000   ebx: ca2c8cc0   ecx: c266e364   edx: dfe3a000
> Jan 18 16:16:12 kimchi kernel: esi: c266e354   edi: 00000018   ebp: dfe3be7c   esp: dfe3be54

which on first glance looks like memory corruption: there's a single
bit-flip in %eax and we oops trying to dereference that.  

Then on reboot we detect an inconsistency on disk, and ext3 behaves as
expected: it aborts the journal, remounts readonly, and you see the
filesystem marked for fsck on the next reboot.

Have you seen this more than once?  This footprint usually indicates a
hardware problem, and memtest86 is a useful tool to diagnose that. 

--Stephen



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