From: Con Kolivas <kernel@kolivas.org>
To: Valdis.Kletnieks@vt.edu
Subject: Re: 2.6.14-rc2-mm1 - ext3 wedging up
Date: Fri, 23 Sep 2005 10:36:16 +1000
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On Fri, 23 Sep 2005 05:59, Valdis.Kletnieks@vt.edu wrote:
> Am seeing reproducible wedging up when writing large (20M+) files to an
> ext3 file system.  Oddly enough, if something *else* writes files to the
> file system as well, it will unwedge for a while and make progress.  Also,
> a 'sync' command will relieve things temporarily - but after a few
> megabytes it comes to a halt again.  Looks like a borkage someplace not
> causing it to actually finish pushing dirty file pages out - gkrellm
> reports little/no disk activity in progress. File activity on *other*
> filesystems continues unimpeded.


Could be the write throttling patches.

Try backing these out (in this order I think):

http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.14-rc2/2.6.14-rc2-mm1/broken-out/per-task-predictive-write-throttling-1-tweaks.patch
http://www.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.14-rc2/2.6.14-rc2-mm1/broken-out/per-task-predictive-write-throttling-1.patch

Cheers,
Con
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