linux-kernel - Re: [BUG?]3.0-rc4+ftrace+kprobe: set kprobe at instruction 'stwu' lead to system crash/freeze

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Date:	Thu, 30 Jun 2011 15:08:32 +0800
From:	Yong Zhang <yong.zhang0@...il.com>
To:	ananth@...ibm.com
Cc:	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	linuxppc-dev@...ts.ozlabs.org,
	linux-kernel <linux-kernel@...r.kernel.org>,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	paulus@...ba.org, galak@...nel.crashing.org,
	yrl.pp-manager.tt@...achi.com
Subject: Re: [BUG?]3.0-rc4+ftrace+kprobe: set kprobe at instruction 'stwu'
 lead to system crash/freeze

On Wed, Jun 29, 2011 at 2:46 PM, Ananth N Mavinakayanahalli
<ananth@...ibm.com> wrote:
>
> Certain functions are off limits for probing -- look for __kprobe

Yup.

> annotations in the kernel. Some such functions are arch specific, but
> show_interrupts() would definitely not be one of them. It works fine on
> my (64bit) test box.
>
> At this time, I think your best bet is to work with the eldk folks to
> narrow down the problem.

I'll give a try :)

> Given the current set of data, I am inclined to
> think it could be an eldk bug, not a kernel one.

Maybe, but the fact is if I don't use kprobe, things works
very well.

I'll be back if there is any update :)

Thanks,
Yong

-- 
Only stand for myself
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