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Subject: Re: 2.6.33: ftrace triggers soft lockup
From: Steven Rostedt <rostedt@goodmis.org>
To: =?ISO-8859-1?Q?Am=E9rico?= Wang <xiyou.wangcong@gmail.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>, Lai Jiangshan <laijs@cn.fujitsu.com>,
       Frederic Weisbecker <fweisbec@gmail.com>,
       LKML <linux-kernel@vger.kernel.org>, Ingo Molnar <mingo@elte.hu>
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Date: Sun, 14 Mar 2010 12:55:51 -0400
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On Sat, 2010-03-13 at 13:37 +0800, Américo Wang wrote:
> On Fri, Mar 12, 2010 at 09:07:29PM -0500, Steven Rostedt wrote:
> >
> >Americo,
> >
> >I still do not know why the function graph tracer is making your system
> >unusable. I'll look more into that when I get a chance. So far, I have
> >not had any issues on any of my boxes.
> >
> 
> Oh, in fact, I just tried 2 x86_64 machines, both of them have this
> problem.
> 
> Sorry that I don't have much time to do bisect, the last kernel that
> I tried is 2.6.32-rc6, it is bad too. I will try some older kernels
> if I have time.

It may be a config problem. I'll analyze your config again and see if I
can find something with it. But this will need to wait till next week.

Thanks,

-- Steve