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Date:	Wed, 14 May 2008 13:45:37 -0400
From:	Nick Dokos <nicholas.dokos@...com>
To:	cmm@...ibm.com
Cc:	nicholas.dokos@...com, linux-ext4@...r.kernel.org
Subject: Re: Soft lockups in mballoc code 

Mingming Cao <cmm@...ibm.com> wrote:

> On Mon, 2008-05-12 at 13:21 -0400, Nick Dokos wrote:
> > I keep getting soft lockups in mballoc code, running fsstress.
> > I'm running a 2.6.25.2 kernel, with 1.40.8 e2fsprogs. Here
> > is sample console output on a 2-cpu Opteron box with a 2Tb filesystem -
> > the two stack traces keep repeating every minute or so and the only
> > way to get out is to reset the box:
> > 
> Nick, thanks for reporting this. I remember saw soft lockup issue with
> mballoc on 2.6.25-rc kernels.  Could you run the latest 2.6.26-rc2
> kernel? There are lots of bug fixes have been pushed to 2.6.26-rc1.
> Aneesh, do you know if this is a new issue?
> 

Hi Mingming,

I'll do so at the earliest opportunity. In the meantime, I wanted to let
you know that I tried the (stable) 2.6.25.3 kernel on x86-64 and encountered the
same problem, but I also tried it on an IA64 system (again with the
2.6.25.3 kernel) and did *not* encounter the problem. Not sure what this
means yet, but I'll let you know as soon as I get some more information.

Thanks very much,
Nick

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