From: Li Zefan <lizf@cn.fujitsu.com>
To: Mike Galbraith <efault@gmx.de>
Cc: LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>,
Peter Zijlstra <peterz@infradead.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Arnaldo Carvalho de Melo <acme@redhat.com>,
Paul Mackerras <paulus@samba.org>
Subject: Re: [BUG] perf: hard lockup when using perf-sched
Date: Mon, 29 Mar 2010 10:01:44 +0800 [thread overview]
Message-ID: <4BB00A08.2050702@cn.fujitsu.com> (raw)
In-Reply-To: <1269598293.6174.8.camel@marge.simson.net>
> This seems to work, in contrast to everything I tried yesterday. Not
> exactly a thing of beauty, but at least it's an option, so...
>
> perf: fix perf sched record forkbomb deadlock
>
> perf sched record can deadlock a box should the holder of handle->data->lock
> take an interrupt, and then attempt to acquire an rq lock held by a CPU trying
> to acquire the same lock. Disable interrupts.
>
This patch fixes the lockup on my box. Thanks!
> Signed-off-by: Mike Galbraith <efault@gmx.de>
> Cc: Ingo Molnar <mingo@elte.hu>
> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
> Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
> Cc: Frederic Weisbecker <fweisbec@gmail.com>
> Reported-by: Li Zefan <lizf@cn.fujitsu.com>
> LKML-Reference: <new-submission>
>
next prev parent reply other threads:[~2010-03-29 2:00 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-17 7:21 [BUG] perf: hard lockup when using perf-sched Li Zefan
2010-03-24 5:52 ` Li Zefan
2010-03-24 7:32 ` Mike Galbraith
2010-03-24 8:17 ` Mike Galbraith
2010-03-25 8:04 ` Li Zefan
2010-03-25 9:27 ` Mike Galbraith
2010-03-25 9:54 ` Peter Zijlstra
2010-03-26 10:11 ` Mike Galbraith
2010-03-26 17:23 ` Frederic Weisbecker
2010-03-26 19:10 ` Mike Galbraith
2010-03-26 19:27 ` Frederic Weisbecker
2010-03-26 20:22 ` Mike Galbraith
2010-03-26 21:41 ` Frederic Weisbecker
2010-03-26 21:45 ` Frederic Weisbecker
2010-03-29 2:01 ` Li Zefan [this message]
2010-04-02 19:07 ` [tip:perf/core] perf: Fix 'perf sched record' deadlock tip-bot for Mike Galbraith
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