Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757275AbZFKSLK (ORCPT ); Thu, 11 Jun 2009 14:11:10 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1755819AbZFKSK5 (ORCPT ); Thu, 11 Jun 2009 14:10:57 -0400 Received: from hawking.rebel.net.au ([203.20.69.83]:48876 "EHLO hawking.rebel.net.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756831AbZFKSK4 (ORCPT ); Thu, 11 Jun 2009 14:10:56 -0400 Message-ID: <4A3148AA.9000007@davidnewall.com> Date: Fri, 12 Jun 2009 03:40:50 +0930 From: David Newall User-Agent: Thunderbird 2.0.0.21 (X11/20090318) MIME-Version: 1.0 To: Pekka Enberg CC: Linus Torvalds , Christoph Hellwig , Peter Zijlstra , Al Viro , Ingo Molnar , "David S. Miller" , Stephane Eranian , linux-kernel@vger.kernel.org, Paul Mackerras , Andrew Morton , Thomas Gleixner Subject: Re: [GIT PULL] Performance Counters for Linux References: <20090611160329.GA3366@elte.hu> <20090611161714.GA5008@infradead.org> <20090611165226.GV8633@ZenIV.linux.org.uk> <1244739378.6691.540.camel@laptop> <20090611170015.GA3651@infradead.org> <84144f020906111059g6e25a090y4434cfd698f84fb4@mail.gmail.com> In-Reply-To: <84144f020906111059g6e25a090y4434cfd698f84fb4@mail.gmail.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 799 Lines: 16 Pekka Enberg wrote: > And really, what do we gain by moving perf out of tree and making it > follow its own release cycle (and getting out of sync eventually)? I'm sure perf will change, for example as faults are discovered in it. Perhaps, too, the kernel side counters will change, but will the ABI? Peter Zijlstra comment ("we most certainly intend to maintain its ABI") implies it won't, or won't in such a way as to break user space tools. What I'm saying is that this doesn't sound like something that needs user-space in lock-step with kernel. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/