linux-kernel - Re: EeePC 900 reboots/hangs when using using perf -a -f -g

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Message-ID: <1284289027.2251.95.camel@laptop>
Date:	Sun, 12 Sep 2010 12:57:07 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Sitsofe Wheeler <sitsofe@...oo.com>
Cc:	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	Corentin Chary <corentincj@...aif.net>,
	fweisbec <fweisbec@...il.com>
Subject: Re: EeePC 900 reboots/hangs when using using perf -a -f -g

On Sun, 2010-09-12 at 11:28 +0100, Sitsofe Wheeler wrote:
> Hi,
> 
> On an EeePC 900 running 2.6.36rc3 I've been finding that the laptop
> immediately reboots or hangs forever if I run
> 
> perf -a -f -g xset dpms force off
> 
> . I've got lockdep checking and stack overflow checking on but these
> don't make any difference. Using only -a -f doesn't show the problem. I
> have also found that disabling eeepc-laptop in the kernel config also
> removes the problem.
> 
> Any suggestions?

Bisect it?

Does .35 work? If so, you could try it with the .35 version of
eeepc-laptop driver to see if its something specific to that driver, or
if its something we did to the stack unwinding code.

Most curious issue..
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