From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail191.messagelabs.com (mail191.messagelabs.com [216.82.242.19]) by kanga.kvack.org (Postfix) with SMTP id 7936C6B0088 for ; Thu, 10 Dec 2009 13:05:00 -0500 (EST) Date: Thu, 10 Dec 2009 12:04:45 -0600 (CST) From: Christoph Lameter Subject: Re: [RFC mm][PATCH 2/5] percpu cached mm counter In-Reply-To: <20091210173819.GA5256@elte.hu> Message-ID: References: <20091210163115.463d96a3.kamezawa.hiroyu@jp.fujitsu.com> <20091210163448.338a0bd2.kamezawa.hiroyu@jp.fujitsu.com> <20091210075454.GB25549@elte.hu> <20091210172040.37d259d3.kamezawa.hiroyu@jp.fujitsu.com> <20091210083310.GB6834@elte.hu> <20091210173819.GA5256@elte.hu> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org To: Ingo Molnar Cc: KAMEZAWA Hiroyuki , Peter Zijlstra , "linux-mm@kvack.org" , "linux-kernel@vger.kernel.org" , "akpm@linux-foundation.org" , minchan.kim@gmail.com List-ID: On Thu, 10 Dec 2009, Ingo Molnar wrote: > > * Christoph Lameter wrote: > > > On Thu, 10 Dec 2009, Ingo Molnar wrote: > > > > > > > > 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//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. > > > > vital MM stats are exposed via /proc/ interfaces. Performance > > monitoring is something optional MM VM stats are used for VM decision > > on memory and process handling. > > You list a few facts here but what is your point? The stats are exposed already in a well defined way. Exposing via perf is outside of the scope of his work. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org