linux-kernel - Re: [PATCH 2/3] perf_event: allocate children's perf_event

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Date:	Wed, 9 Dec 2009 09:43:08 +0100
From:	Frederic Weisbecker <fweisbec@...il.com>
To:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
Cc:	Ingo Molnar <mingo@...e.hu>, Peter Zijlstra <peterz@...radead.org>,
	Paul Mackerras <paulus@...ba.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/3] perf_event: allocate children's perf_event_ctxp at
	the right time

On Wed, Dec 09, 2009 at 11:29:44AM +0800, Xiao Guangrong wrote:
> In current code, children task will allocate memory for
> 'child->perf_event_ctxp' if the parent is counted, we can
> do it only if the parent allowed children inherit it.
> 
> It can save memory and reduce overhead
> 
> Signed-off-by: Xiao Guangrong <xiaoguangrong@...fujitsu.com>



Reviewed-by: Frederic Weisbecker <fweisbec@...il.com>

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