From: Li Zefan <lizf@cn.fujitsu.com>
To: "Américo Wang" <xiyou.wangcong@gmail.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Steven Rostedt <rostedt@goodmis.org>,
Frederic Weisbecker <fweisbec@gmail.com>,
Ingo Molnar <mingo@elte.hu>
Subject: Re: 2.6.33: ftrace triggers soft lockup
Date: Thu, 04 Mar 2010 09:33:29 +0800 [thread overview]
Message-ID: <4B8F0DE9.1070907@cn.fujitsu.com> (raw)
In-Reply-To: <2375c9f91003022204p5bdab1fdj3b3500998575fc28@mail.gmail.com>
Américo Wang wrote:
> Hi, Steven, Frederic, Ingo,
>
> I am not sure if this is ftrace's fault, but it is ftrace who triggers
> the soft lockup. On my machine, it is pretty easy, just run:
>
> echo function_graph > current_tracer
>
> I found this when 2.6.33-rc7, but forgot to report here. I just tried today's
> Linus tree, it still has this problem.
>
I can also trigger soft lockup while running a stress test for ftrace.
I'll post detailed information after more testing.
next prev parent reply other threads:[~2010-03-04 1:33 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-03 6:04 2.6.33: ftrace triggers soft lockup Américo Wang
2010-03-03 13:05 ` Steven Rostedt
2010-03-04 2:58 ` Américo Wang
2010-03-04 1:33 ` Li Zefan [this message]
2010-03-04 1:46 ` Frederic Weisbecker
2010-03-04 3:01 ` Américo Wang
2010-03-04 3:18 ` Steven Rostedt
2010-03-04 4:06 ` Frederic Weisbecker
2010-03-04 5:10 ` Américo Wang
2010-03-04 5:18 ` Frederic Weisbecker
2010-03-04 13:54 ` Steven Rostedt
2010-03-05 4:14 ` Américo Wang
2010-03-05 7:16 ` Américo Wang
2010-03-05 15:06 ` Steven Rostedt
2010-03-05 17:16 ` Frederic Weisbecker
2010-03-05 18:35 ` Steven Rostedt
2010-03-05 18:43 ` Frederic Weisbecker
2010-03-05 19:07 ` Steven Rostedt
2010-03-08 7:32 ` Li Zefan
2010-03-08 15:15 ` Steven Rostedt
2010-03-09 2:11 ` Li Zefan
2010-03-09 2:23 ` Steven Rostedt
2010-03-09 3:38 ` Li Zefan
2010-03-12 19:20 ` Steven Rostedt
2010-03-12 21:38 ` Steven Rostedt
2010-03-13 2:07 ` Steven Rostedt
2010-03-13 5:37 ` Américo Wang
2010-03-13 5:51 ` Steven Rostedt
2010-03-14 16:55 ` Steven Rostedt
2010-03-13 17:56 ` Steven Rostedt
2010-03-15 1:46 ` Li Zefan
2010-03-15 14:39 ` Steven Rostedt
2010-03-15 16:16 ` Steven Rostedt
2010-03-08 2:31 ` Américo Wang
2010-03-09 2:40 ` Américo Wang
2010-03-09 2:51 ` Steven Rostedt
2010-03-09 5:06 ` Américo Wang
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