From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752261AbYAIHSg (ORCPT ); Wed, 9 Jan 2008 02:18:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1750828AbYAIHS3 (ORCPT ); Wed, 9 Jan 2008 02:18:29 -0500 Received: from verein.lst.de ([213.95.11.210]:33965 "EHLO verein.lst.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750824AbYAIHS2 (ORCPT ); Wed, 9 Jan 2008 02:18:28 -0500 Date: Wed, 9 Jan 2008 08:17:27 +0100 From: Christoph Hellwig To: Dave Airlie Cc: Andrew Morton , torvalds@linux-foundation.org, hch@lst.de, ak@suse.de, pq@iki.fi, jbeulich@novell.com, mingo@elte.hu, linux-kernel@vger.kernel.org Subject: Re: [PATCH] Revert "x86: optimize page faults like all other achitectures and kill notifier cruft" Message-ID: <20080109071727.GA10695@lst.de> References: Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.3.28i X-Spam-Score: 0 () Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jan 09, 2008 at 02:34:46AM +0000, Dave Airlie wrote: > > [This an initial RFC but I'd like to have this patch in before 2.6.24 goes > final as it really breaks this useful feature] > > mmiotrace the MMIO access tracer used to reverse engineer binary blobs > used this notifier interface and is planned on being pushed upstream. > > Having users able to just use the tracer module without having to rebuild > their kernel to add in a page fault handler hack means we get a lot > greater coverage for reverse engineering efforts. > > Signed-off-by: David Airlie > > This reverts commit 74a0b5762713a26496db72eac34fbbed46f20fce. > Conflicts: NACK. If you want to do it you'll need a much better reason and an in-tree user. And if you want to redo it it should be available for all platforms with a consistant API.