From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756004AbYAIUlT (ORCPT ); Wed, 9 Jan 2008 15:41:19 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752466AbYAIUlL (ORCPT ); Wed, 9 Jan 2008 15:41:11 -0500 Received: from c60.cesmail.net ([216.154.195.49]:41073 "EHLO c60.cesmail.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750720AbYAIUlK (ORCPT ); Wed, 9 Jan 2008 15:41:10 -0500 Subject: Re: Replacement for page fault notifiers? From: Pavel Roskin To: Christoph Hellwig Cc: benh@kernel.crashing.org, Dave Airlie , Pekka Paalanen , linux-kernel@vger.kernel.org, jbeulich@novell.com In-Reply-To: <20080109202644.GA5514@infradead.org> References: <20080108210638.5c9e093a@daedalus.pq.iki.fi> <20080108203235.GA772@infradead.org> <21d7e9970801081413n307ab07aq462a9fff014143ae@mail.gmail.com> <1199838407.6734.83.camel@pasglop> <1199902724.8050.11.camel@dv> <20080109182157.GA32754@infradead.org> <1199908703.6734.133.camel@pasglop> <1199910256.11485.14.camel@dv> <20080109202644.GA5514@infradead.org> Content-Type: text/plain Date: Wed, 09 Jan 2008 15:41:08 -0500 Message-Id: <1199911268.11485.18.camel@dv> Mime-Version: 1.0 X-Mailer: Evolution 2.12.2 (2.12.2-2.fc8) Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 2008-01-09 at 20:26 +0000, Christoph Hellwig wrote: > On Wed, Jan 09, 2008 at 03:24:16PM -0500, Pavel Roskin wrote: > > I just assumed (wrongly, as it seems) that the API change didn't remove > > any useful functionality. > > No, this was exactly the correct assumption. Out of tree modules simply > don't count. > > > The problem is that mmiotrace only makes sense in combination with > > non-free drivers, and I'm not sure it would be welcome in the kernel > > even if you say so. > > It can trace every driver in theory although it's of course not > really interesting for free drivers. But it's not actually > functionality used by the drivers but functionlity to trace the drivers > so it's quite different anyway. OK, that's reassuring. Maybe it could be used for profiling or to find bugs that are not obvious otherwise. -- Regards, Pavel Roskin