linux-kernel - Re: 2.6.33: ftrace triggers soft lockup

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Message-ID: <1268459478.3366.5.camel@localhost>
Date:	Sat, 13 Mar 2010 00:51:18 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Américo Wang <xiyou.wangcong@...il.com>
Cc:	Li Zefan <lizf@...fujitsu.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: 2.6.33: ftrace triggers soft lockup

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

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