Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759597AbXJ2Ssd (ORCPT ); Mon, 29 Oct 2007 14:48:33 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1759193AbXJ2SsU (ORCPT ); Mon, 29 Oct 2007 14:48:20 -0400 Received: from mx1.redhat.com ([66.187.233.31]:41480 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758260AbXJ2SsS (ORCPT ); Mon, 29 Oct 2007 14:48:18 -0400 Date: Mon, 29 Oct 2007 14:47:47 -0400 From: Dave Jones To: Andi Kleen Cc: Linux Kernel , Martin Ebourne , Zou Nan hai , Suresh Siddha , stable@kernel.org, Andrew Morton , Linus Torvalds Subject: Re: 2.6.23 boot failures on x86-64. Message-ID: <20071029184747.GB1650@redhat.com> Mail-Followup-To: Dave Jones , Andi Kleen , Linux Kernel , Martin Ebourne , Zou Nan hai , Suresh Siddha , stable@kernel.org, Andrew Morton , Linus Torvalds References: <20071029175014.GH7793@redhat.com> <200710291918.43869.ak@suse.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <200710291918.43869.ak@suse.de> User-Agent: Mutt/1.5.14 (2007-02-12) Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1076 Lines: 27 On Mon, Oct 29, 2007 at 07:18:43PM +0100, Andi Kleen wrote: > On Monday 29 October 2007 18:50:14 Dave Jones wrote: > > We've had a number of people reporting that their x86-64s stopped booting > > when they moved to 2.6.23. It rebooted just after discovering the AGP bridge > > as a result of the IOMMU init. > > It's probably the usual "nobody tests sparsemem at all" issue. We've been using SPARSEMEM in Fedora for a *long* time. So long in fact, I forget why we moved away from DISCONTIGMEM, so there's a significant number of users using that configuration for some time. > But if allocating bootmem >4G doesn't work on these systems > most likely they have more problems anyways. It might be better > to find out what goes wrong exactly. Any ideas on what to instrument ? Dave -- http://www.codemonkey.org.uk - 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/