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List: linux-ext4
Subject: Re: 2.6.18-mm2: ext3 BUG?
From: Jan Kara <jack () suse ! cz>
Date: 2006-10-23 10:41:41
Message-ID: 20061023104141.GB3162 () atrey ! karlin ! mff ! cuni ! cz
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Hello,
> On Wed, 2006-10-11 12:42:02 +0200, Jan Kara <jack@suse.cz> wrote:
> > > On Sun, 2006-10-08 08:33:30 +0200, Jan-Benedict Glaw <jbglaw@lug-owl.de> wrote:
> > > While I could reproduce it with a 200MB file, it seems I can't break
> > > it with a 10MB file.
> > Hmm, I was running the test for several ours without any problem...
> > The kernel is 2.6.17.6, ext3 in ordered data mode, standard SATA disk. I'm
> > now running it again and trying my luck ;). What is your testing environment?
>
> kolbe34-backup:/mnt# uname -a
Thanks for info. This looks pretty similar to what I have (only that
I have Athlon).
> Still running Debian's 2.6.17-2-686, I'm now tracking down the file
> size when I start to see this type of corruption. Right now, it seems
> I never get it with a 16384 KB (16 MB) large file, but I get it with a
> 21504 KB (21 MB) file.
>
> Is there something important that changes handling of file contents in
> the 16..21 MB range?
Umm, I've checked and found nothing obvious. We already have to use
double-indirect block at 16MB, maybe reservation code does some
distiction. Could you mount the filesystem with -o 'noreservation' and
see whether you can still reproduce the problem? Also it may be useful
to find out, whether you see the failure also with some older kernels...
Honza
>
> dumpe2fs output at http://lug-owl.de/~jbglaw/ext3-dumpe2fs.txt for
> that filesystem. I'll now run with a 18.5 MB file...
>
> MfG, JBG
>
> --
> Jan-Benedict Glaw jbglaw@lug-owl.de +49-172-7608481
> Signature of: Wenn ich wach bin, träume ich.
> the second :
--
Jan Kara <jack@suse.cz>
SuSE CR Labs
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