Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757312AbYGIOkL (ORCPT ); Wed, 9 Jul 2008 10:40:11 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753908AbYGIOj6 (ORCPT ); Wed, 9 Jul 2008 10:39:58 -0400 Received: from netops-testserver-3-out.sgi.com ([192.48.171.28]:53297 "EHLO relay.sgi.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753575AbYGIOj5 (ORCPT ); Wed, 9 Jul 2008 10:39:57 -0400 Message-ID: <4874CDBC.6010500@sgi.com> Date: Wed, 09 Jul 2008 07:39:56 -0700 From: Mike Travis User-Agent: Thunderbird 2.0.0.6 (X11/20070801) MIME-Version: 1.0 To: Jeremy Fitzhardinge CC: "Eric W. Biederman" , "H. Peter Anvin" , Christoph Lameter , Linux Kernel Mailing List , Ingo Molnar , Andrew Morton , Jack Steiner Subject: Re: [crash, bisected] Re: [PATCH 3/4] x86_64: Fold pda into per cpu area References: <20080604003018.538497000@polaris-admin.engr.sgi.com> <48691556.2080208@zytor.com> <48691E8B.4040605@sgi.com> <48694B3B.3010600@goop.org> <486A61A7.1000902@zytor.com> <486A68DD.80702@goop.org> <486A9D4F.8010508@goop.org> <486AA72B.6010401@goop.org> <486AC9D9.9030506@zytor.com> <486AD6BD.9080600@sgi.com> <486ADD67.1020809@sgi.com> <486ADD9F.3000305@zytor.com> <486C062C.3090408@sgi.com> <48724FB4.3090305@sgi.com> <4873B016.8010404@sgi.com> <4873FD00.1060101@goop.org> In-Reply-To: <4873FD00.1060101@goop.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1179 Lines: 35 Jeremy Fitzhardinge wrote: > Eric W. Biederman wrote: >> Mike Travis writes: >> >> >>> Unfortunately it's back to the problem of faulting before >>> x86_64_start_kernel() >>> and grub just immediately reboots. So I'm back at analyzing >>> assembler and >>> config differences. >>> >> >> Ok. That is a narrow window of code. So it shouldn't be too bad, >> nasty though. >> >> If you would like to trace through it I have attached my serial port >> debugging routines that I use in that part of the code. > > Last time it was doing this, it was a result of a triple-fault caused by > loading %ds with an all-zero gdt. I modified Xen to dump the CPU state > on triple-faults, so it was easy to pinpoint. I can do that again if it > helps. > > J Absolutely! I'll repost the latest version of the patchset. Still haven't gotten around to enabling a XEN boot but it sure does sound handy. Thanks, Mike -- 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/