Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758699AbZFKSqf (ORCPT ); Thu, 11 Jun 2009 14:46:35 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1757801AbZFKSpf (ORCPT ); Thu, 11 Jun 2009 14:45:35 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:33671 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758176AbZFKSpe (ORCPT ); Thu, 11 Jun 2009 14:45:34 -0400 Date: Thu, 11 Jun 2009 11:44:54 -0700 (PDT) From: Linus Torvalds X-X-Sender: torvalds@localhost.localdomain To: David Newall cc: Pekka Enberg , 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 In-Reply-To: <4A314F37.2080202@davidnewall.com> Message-ID: 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> <4A3148AA.9000007@davidnewall.com> <4A314F37.2080202@davidnewall.com> User-Agent: Alpine 2.01 (LFD 1184 2008-12-16) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 783 Lines: 20 On Fri, 12 Jun 2009, David Newall wrote: > > While I'm still unable to help noticing things, nobody seems to have > presented an argument that user-space and kernel-side will need to be > developed together. Well, I tried to give two reasons in my reply to Martin (it's there somewhere in cyberspace, a couple of minutes ago). Basically timeliness (kernel features vs taking advantage of them) and co-development (there always seems to be a huge impedance mis-match between user-level developers and kernel developers). Linus -- 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/