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Date: Thu, 10 Dec 2009 09:33:10 +0100
From: Ingo Molnar <mingo@elte.hu>
To: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>,
       "linux-mm@kvack.org" <linux-mm@kvack.org>,
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       cl@linux-foundation.org,
       "akpm@linux-foundation.org" <akpm@linux-foundation.org>,
       minchan.kim@gmail.com
Subject: Re: [RFC mm][PATCH 2/5] percpu cached mm counter
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* KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> wrote:

> I'm sorry If I miss your point...are you saying remove all mm_counter 
> completely and remake them under perf ? If so, some proc file 
> (/proc/<pid>/statm etc) will be corrupted ?

No, i'm not suggesting that - i'm just suggesting that right now MM 
stats are not very well suited to be exposed via perf. If we wanted to 
measure/sample the information in /proc/<pid>/statm it just wouldnt be 
possible. We have a few events like pagefaults and a few tracepoints as 
well - but more would be possible IMO.

	Ingo
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