linux-kernel - Re: [BUG] local_softirq

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Date:	Mon, 21 May 2007 11:52:07 +0530
From:	Anant Nitya <kernel@...chanda.info>
To:	linux-kernel@...r.kernel.org
Cc:	Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...e.hu>,
	Michal Piotrowski <michal.k.k.piotrowski@...il.com>
Subject: Re: [BUG] local_softirq_pending storm

On Monday 21 May 2007 03:13:08 Thomas Gleixner wrote:
> On Sun, 2007-05-20 at 02:53 +0530, Anant Nitya wrote:
> > > 1 == TASK_INTERRUPTIBLE, so we know that ksoftirqd was not woken up. At
> > > least it is not a scheduler problem.
> > >
> > > I work out a more complex debug patch and pester you to test once I'm
> > > done.
> >
> > No problem :)
>
> You asked for it :)
>
> Please patch 2.6.22-rc2 with
>
> http://tglx.de/projects/hrtimers/2.6.22-rc2/patch-2.6.22-rc2-hrt2.patch
> and
> http://www.tglx.de/private/tglx/ht-debug/tracer.diff
>
> Compile it with the config
>
> http://www.tglx.de/private/tglx/ht-debug/config.debug
>
> You should find something like:
>
> (         swapper-0    |#0): new 67173 us user-latency.
>
> along with the familiar "NOHZ ......" message in your log file.
>
> Once that happened please do:
>
> $ cat /proc/latency_trace >trace.txt
>
> compress it and send it to me along with the full dmesg output or put
> both up to some place, where I can download it.
Hi Thomas

Here are the links...
http://cybertek.info/taitai/dmesg-2.6.22.rc2.hrt2-1.SMP.DN.LINUX.txt
http://cybertek.info/taitai/trace.txt.bz2

Regards
Ananitya

>
> Michal,
>
> IIRC you encountered the same P4/HT related wreckage. Can you do the
> same ?
>
> Thanks,
>
> 	tglx



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