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

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Date:	Mon, 08 Mar 2010 21:23:14 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	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 Tue, 2010-03-09 at 10:11 +0800, Li Zefan wrote:
> Steven Rostedt wrote:
> > On Mon, 2010-03-08 at 15:32 +0800, Li Zefan wrote:

> > This sounds like the compiler may have screwed up again. Can you compile
> > with this patch and see if it catches anything?
> > 
> 
> But I was using a x86_64 machine, and this patch won't do anything on
> x86_64?

I wonder if this issue has crept to x86_64. What kind of dump do you
get? And if this segfault is in the kernel, could you see (using gdb on
a vmlinux) if any of the stack frame setups look peculiar?

Thanks,

-- Steve



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