From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755176AbYAIP1R (ORCPT ); Wed, 9 Jan 2008 10:27:17 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752184AbYAIP1E (ORCPT ); Wed, 9 Jan 2008 10:27:04 -0500 Received: from mx2.mail.elte.hu ([157.181.151.9]:53603 "EHLO mx2.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752010AbYAIP1C (ORCPT ); Wed, 9 Jan 2008 10:27:02 -0500 Date: Wed, 9 Jan 2008 16:26:40 +0100 From: Ingo Molnar To: Andi Kleen Cc: Arjan van de Ven , Dave Airlie , Andrew Morton , torvalds@linux-foundation.org, hch@lst.de, pq@iki.fi, jbeulich@novell.com, linux-kernel@vger.kernel.org Subject: Re: [PATCH] Revert "x86: optimize page faults like all other achitectures and kill notifier cruft" Message-ID: <20080109152640.GA21909@elte.hu> References: <20080108190611.3b9c0760.akpm@linux-foundation.org> <20080109071846.5c672a5c@laptopd505.fenrus.org> <20080109152115.GJ25945@bingen.suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20080109152115.GJ25945@bingen.suse.de> User-Agent: Mutt/1.5.17 (2007-11-01) X-ELTE-VirusStatus: clean X-ELTE-SpamScore: -1.5 X-ELTE-SpamLevel: X-ELTE-SpamCheck: no X-ELTE-SpamVersion: ELTE 2.0 X-ELTE-SpamCheck-Details: score=-1.5 required=5.9 tests=BAYES_00 autolearn=no SpamAssassin version=3.2.3 -1.5 BAYES_00 BODY: Bayesian spam probability is 0 to 1% [score: 0.0000] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org * Andi Kleen wrote: > On Wed, Jan 09, 2008 at 07:18:46AM -0800, Arjan van de Ven wrote: > > On Wed, 9 Jan 2008 03:17:37 +0000 (GMT) > > Dave Airlie wrote: > > > > > So all distros with 2.6.24 kernels are useless to mmiotrace I don't > > > see why leaving things as is until a suitable replacement mechanism > > > can be used.. > > > > you work for a distro.. surely you can convince your own distro to > > carry this patch for one release? Maybe if it's this important.. so > > can the others... > > But if it's good for a major distribution why is it not good for > mainline? it's a bit too late to get the out-of-tree module into v2.6.24, and the revert makes little sense without the extra out-of-tree module. We at a minimum need a clear explanation of why this functionality cannot be provided via kprobes/systemtap. > We had this discussion at last kernel summit and the answer was clear. it's a clear answer 1 week after the merge window opens, but not 1 week before the next stable kernel is released. Ingo