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Message-Id: <1179697388.6570.26.camel@chaos> Date: Sun, 20 May 2007 23:43:08 +0200 From: Thomas Gleixner <tglx@...utronix.de> To: Anant Nitya <kernel@...chanda.info> Cc: linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>, Michal Piotrowski <michal.k.k.piotrowski@...il.com> Subject: Re: [BUG] local_softirq_pending storm 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. Michal, IIRC you encountered the same P4/HT related wreckage. Can you do the same ? Thanks, tglx - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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