From: Li Zefan <lizf@cn.fujitsu.com>
To: LKML <linux-kernel@vger.kernel.org>
Cc: 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: Wed, 24 Mar 2010 13:52:05 +0800 [thread overview]
Message-ID: <4BA9A885.9050105@cn.fujitsu.com> (raw)
In-Reply-To: <4BA082EC.8030101@cn.fujitsu.com>
Anyone have a look at this bug ?
Li Zefan wrote:
> An idea came to me that running perf-sched with a fork "bomb" might
> reveal some bug.
>
> So I wrote a program (attached), and did the following test:
>
> # gcc fork.c
> # ./a.out &
> # perf sched record
>
> After a few seconds, the machine froze, without printing any message.
>
> I've tried the test both on v2.6.34-rc1 and v2.6.34-rc1-tip+.
>
> I'll send you any other information you need.
next prev parent reply other threads:[~2010-03-24 5:51 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 [this message]
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
2010-04-02 19:07 ` [tip:perf/core] perf: Fix 'perf sched record' deadlock tip-bot for Mike Galbraith
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