Message-ID: <3EDE7067.1090200@us.ibm.com>
Date: Wed, 04 Jun 2003 15:19:19 -0700
From: Matthew Dobson <colpatch@us.ibm.com>
Reply-To: colpatch@us.ibm.com
Organization: IBM LTC
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To: "Martin J. Bligh" <mbligh@aracnet.com>
CC: Andrew Morton <akpm@digeo.com>,
       linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: mm3 hang
References: <1274420000.1054758735@flay> <3EDE68F8.7DF2D0AC@digeo.com> <1282280000.1054762987@flay>
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Martin J. Bligh wrote:
> --On Wednesday, June 04, 2003 14:47:36 -0700 Andrew Morton <akpm@digeo.com> wrote:
> 
> 
>>"Martin J. Bligh" wrote:
>>
>>>SDET hangs it every few runs.
>>
>>You have a large number of `ps' instances which appear to be
>>stuck on /proc's i_sem and lots of processes stuck in
>>sched_balance_exec->set_cpus_allowed->wait_for_completion.
> 
> 
> OK, thanks. I'm getting several different hangs, so getting confused ;-)
> 
> 
>>The latter is a NUMA-special.  You might want to examine the
>>sched_best_cpu() fixes carefully.  
> 
> Mmm. those looked like they were only for nodes with no cpus ... matt?

I don't think that set of patches would do much for this problem, but 
one never knows?

>>Also see whether 2.5.70+bk does the same thing.
> 
> 
> Good point - will try that.
> 
> Thanks,
> 
> M.

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