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

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Message-ID: <20100313053733.GD3704@hack>
Date:	Sat, 13 Mar 2010 13:37:33 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Steven Rostedt <rostedt@...dmis.org>
Cc:	Li Zefan <lizf@...fujitsu.com>,
	Lai Jiangshan <laijs@...fujitsu.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Américo Wang <xiyou.wangcong@...il.com>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>
Subject: Re: 2.6.33: ftrace triggers soft lockup

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.

Thank you.

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