From: Thomas Gleixner <tglx@linutronix.de>
To: Anant Nitya <kernel@prachanda.info>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@elte.hu>,
Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
Subject: Re: [BUG] local_softirq_pending storm
Date: Sun, 20 May 2007 23:43:08 +0200 [thread overview]
Message-ID: <1179697388.6570.26.camel@chaos> (raw)
In-Reply-To: <200705200253.44992.kernel@prachanda.hub>
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
next prev parent reply other threads:[~2007-05-20 21:36 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-05-09 14:12 Anant Nitya
2007-05-09 16:31 ` Thomas Gleixner
2007-05-10 11:53 ` Anant Nitya
2007-05-10 21:58 ` Thomas Gleixner
2007-05-17 6:41 ` Anant Nitya
2007-05-18 13:01 ` Thomas Gleixner
2007-05-19 4:30 ` Anant Nitya
2007-05-19 9:55 ` Anant Nitya
2007-05-19 19:11 ` Thomas Gleixner
2007-05-19 21:23 ` Anant Nitya
2007-05-20 21:43 ` Thomas Gleixner [this message]
2007-05-21 6:22 ` Anant Nitya
2007-05-21 9:01 ` Thomas Gleixner
2007-05-21 10:02 ` Anant Nitya
2007-05-21 18:45 ` Anant Nitya
2007-05-22 19:03 ` Michal Piotrowski
2007-05-22 19:59 ` Michal Piotrowski
2007-05-22 20:10 ` Ingo Molnar
2007-05-22 20:23 ` Michal Piotrowski
2007-05-23 17:00 ` Chuck Ebbert
2007-05-23 18:38 ` Chuck Ebbert
2007-05-23 23:24 ` Anant Nitya
2007-05-24 7:45 ` Ingo Molnar
2007-05-20 10:18 ` Heiko Carstens
2007-05-20 13:52 ` Thomas Gleixner
2007-05-20 18:36 ` Heiko Carstens
[not found] ` <20070520191800.GA14225@osiris.ibm.com>
[not found] ` <1179689389.6570.1.camel@chaos>
[not found] ` <20070521200428.GA9855@osiris.ibm.com>
2007-05-23 20:54 ` Mikulas Patocka
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