From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761699AbXEaTCr (ORCPT ); Thu, 31 May 2007 15:02:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757130AbXEaTCk (ORCPT ); Thu, 31 May 2007 15:02:40 -0400 Received: from one.firstfloor.org ([213.235.205.2]:38868 "EHLO one.firstfloor.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757117AbXEaTCk (ORCPT ); Thu, 31 May 2007 15:02:40 -0400 Date: Thu, 31 May 2007 21:02:37 +0200 From: Andi Kleen To: Christoph Hellwig , Andi Kleen , Stephane Eranian , linux-kernel@vger.kernel.org Subject: Re: [PATCH 13/22] 2.6.22-rc3 perfmon2 : common core functions Message-ID: <20070531190237.GB7217@one.firstfloor.org> References: <200705291348.l4TDmRvL019775@frankl.hpl.hp.com> <20070531171616.GC23939@frankl.hpl.hp.com> <20070531172828.GC2538@one.firstfloor.org> <20070531182945.GA9747@infradead.org> <20070531184313.GA7217@one.firstfloor.org> <20070531185323.GA10745@infradead.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20070531185323.GA10745@infradead.org> User-Agent: Mutt/1.4.2.1i Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org > People will want perfom and oprofile in the same kernel, and we'd better Yes. > allow useage at the same time, so I'd be very much in favour of having That would be nice, but is not imho critical. > just one backend. Especially giving the huge amount of different > performance counters we have to support. It's not that big an issue in my experience -- there aren't new x86 CPUs that often and normally they don't change much between minor revisions. Also at least Intel now has an architected subset of perfctrs which I expect to cover most people's needs. -Andi