Subject: Re: OOM problems on 2.6.12-rc1 with many fsx tests
From: Mingming Cao <cmm@us.ibm.com>
Reply-To: cmm@us.ibm.com
To: Andrew Morton <akpm@osdl.org>
Cc: andrea@suse.de, mjbligh@us.ibm.com, linux-kernel@vger.kernel.org,
       ext2-devel@lists.sourceforge.net, "Stephen C. Tweedie" <sct@redhat.com>,
       janetinc@us.ibm.com
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Organization: IBM LTC
Date: Mon, 04 Apr 2005 09:50:17 -0700
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On Sun, 2005-04-03 at 18:35 -0700, Andrew Morton wrote:
> Mingming Cao <cmm@us.ibm.com> wrote:
> >
> > I run into OOM problem again on 2.6.12-rc1. I run some(20) fsx tests on
> >  2.6.12-rc1 kernel(and 2.6.11-mm4) on ext3 filesystem, after about 10
> >  hours the system hit OOM, and OOM keep killing processes one by one. I
> >  could reproduce this problem very constantly on a 2 way PIII 700MHZ with
> >  512MB RAM. Also the problem could be reproduced on running the same test
> >  on reiser fs.
> > 
> >  The fsx command is:
> > 
> >  ./fsx -c 10 -n -r 4096 -w 4096 /mnt/test/foo1 &
> 
> 
> This ext3 bug goes all the way back to 2.6.6.

> I don't know yet why you saw problems with reiser3 and I'm pretty sure I
> saw problems with ext2.  More testing is needed there.
> 

We (Janet and I) are chasing this bug as well. Janet is able to
reproduce this bug on 2.6.9 but I can't. Glad to know you have nail down
this issue on ext3. I am pretty sure I saw this on Reiser3 once, I will
double check it.  Will try your patch today.
 
Thanks,
Mingming

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