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SubjectRe: EXT-3 bug with 2.6.0-test9
Gertjan van Wingerde <gwingerde@home.nl> wrote:
>
> Hi,
>
> (Please CC me in any replies, as I'm not subscribed to the list)
>
> I've just experienced the strange behaviour that my /usr mount auto-magically
> got mounted read-only, where it was mounted read-write (obviously).
> Investigating the cause of this I've found the following EXT-3 related BUG in
> my log-files:
>
> kernel BUG at fs/jbd/journal.c:1733!

Yes. This newly-added BUG check was too easy to trigger and in test10 it
was changed to a printk-and-fix-it-up.

> Nov 25 20:24:20 localhost vmunix: EXT3-fs warning (device md1): ext3_unlink:
> Deleting nonexistent file (230991), 0
> Nov 25 20:24:21 localhost vmunix: EXT3-fs warning (device md1): ext3_unlink:
> Deleting nonexistent file (230990), 0
> Nov 25 20:24:21 localhost vmunix: EXT3-fs warning (device md1): ext3_unlink:
> Deleting nonexistent file (346096), 0

And it is this stuff which triggered the bogus BUG. I do not know why this
happened, but it is probably some form of data loss problem at the md
layer.

It could have happened at any time after the most recent fsck, so if you
have been running earlier kernels on that machine it could even be that the
bug which caused this has already been fixed.

You should run a fsck across all filesystems, and maybe upgrade to test10
plus ftp://ftp.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.0-test10-bk1.gz


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