linux-kernel - Re: System hangs on running kernbench

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Message-ID: <20070718094142.GA12330@linux.vnet.ibm.com>
Date:	Wed, 18 Jul 2007 15:11:42 +0530
From:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Balbir Singh <balbir@...ibm.com>,
	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org
Subject: Re: System hangs on running kernbench

On Wed, Jul 18, 2007 at 01:07:00AM -0700, Andrew Morton wrote:
> On Wed, 18 Jul 2007 13:26:48 +0530 Dhaval Giani <dhaval@...ux.vnet.ibm.com> wrote:
> 
> > I was running kernbench on top of 2.6.22-rc6-mm1 and I got a Hangcheck
> > alert (This is when kernbench reached make -j).
> 
> hm, never had a report of that before.  It's the first time I've seen
> hangcheck produce anything useful, frankly.
> 
> Was the softlockup detector not enabled?

I notice CONFIG_DETECT_SOFTLOCKUP=y
> 
> > Also make -j is hanging.
> 
> Please try to capture the full sysrq-T output when it is hung.

Available at http://dhaval.giani.googlepages.com/sysrq-t-trace.bz2

In the meantime I will go and check if it was there in 2.6.22-rc4-mm2

-- 
regards,
Dhaval

I would like to change the world but they don't give me the source code!
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