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

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Message-ID: <1267710847.10871.102.camel@gandalf.stny.rr.com>
Date:	Thu, 04 Mar 2010 08:54:07 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Américo Wang <xiyou.wangcong@...il.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: 2.6.33: ftrace triggers soft lockup

On Wed, 2010-03-03 at 14:04 +0800, Américo Wang wrote:
> 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.

So this is not present in 2.6.33-rc6? If you know approximately when it
appeared, would you be able to do a git bisect on it?

Thanks,

-- Steve

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