linux-kernel - Re: [BUG] lock issue in perf cgroup with jump label enabled

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Message-ID: <4D70495D.8010403@cn.fujitsu.com>
Date:	Fri, 04 Mar 2011 10:07:25 +0800
From:	Li Zefan <lizf@...fujitsu.com>
To:	Peter Zijlstra <peterz@...radead.org>
CC:	Stephane Eranian <eranian@...gle.com>, Ingo Molnar <mingo@...e.hu>,
	Jason Baron <jbaron@...hat.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [BUG] lock issue in perf cgroup with jump label enabled

Peter Zijlstra wrote:
> On Thu, 2011-03-03 at 11:06 +0100, Peter Zijlstra wrote:
>>
>>> list_add_event() is called with spin lock ctl->lock held,  while
>>> jump_label_inc() will acquire jump_label_mutex..
>>
> 
> The below seems to actually work, I totally overlooked the dec case
> earlier.
> 

Yes, it works. Thanks!
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