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Date:	Sun, 14 Mar 2010 12:55:51 -0400
From:	Steven Rostedt <>
To:	Américo Wang <>
Cc:	Li Zefan <>,
	Lai Jiangshan <>,
	Frederic Weisbecker <>,
	LKML <>, Ingo Molnar <>
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.


-- Steve

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