Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753722AbZFKUKg (ORCPT ); Thu, 11 Jun 2009 16:10:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751384AbZFKUK3 (ORCPT ); Thu, 11 Jun 2009 16:10:29 -0400 Received: from smtp1.linux-foundation.org ([140.211.169.13]:35218 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751309AbZFKUK3 (ORCPT ); Thu, 11 Jun 2009 16:10:29 -0400 Date: Thu, 11 Jun 2009 13:09:58 -0700 (PDT) From: Linus Torvalds X-X-Sender: torvalds@localhost.localdomain To: Andrew Morton cc: hch@infradead.org, a.p.zijlstra@chello.nl, Al Viro , Ingo Molnar , "David S. Miller" , eranian@googlemail.com, Linux Kernel Mailing List , paulus@samba.org, tglx@linutronix.de Subject: Re: [GIT PULL] Performance Counters for Linux In-Reply-To: <20090611125804.411095e8.akpm@linux-foundation.org> 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> <20090611125804.411095e8.akpm@linux-foundation.org> 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: 1117 Lines: 27 On Thu, 11 Jun 2009, Andrew Morton wrote: > > It could be that shipping userspace code in the kernel bundle will > improve that situation. So let's give it a try. If it turns out to be > good, let's do it again. If it turns out to be bad, let's move perf > out of the kernel tree and not do it again. Exactly. Right now, I use the oprofile experience as a reason for why we should try to do this. But hey, who knows, in one year, maybe people will use _this_ experience as a reason why we should never do it again. We just don't know yet. But that's no reason not to try. Either way, we'll hopefully learn something. Or to quote Edison: "I have not failed 700 times. I have not failed once. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work." 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/