From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754726AbZHYLmy (ORCPT ); Tue, 25 Aug 2009 07:42:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1754504AbZHYLmx (ORCPT ); Tue, 25 Aug 2009 07:42:53 -0400 Received: from sg2ehsobe003.messaging.microsoft.com ([207.46.51.77]:59924 "EHLO SG2EHSOBE003.bigfish.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1752547AbZHYLmw convert rfc822-to-8bit (ORCPT ); Tue, 25 Aug 2009 07:42:52 -0400 X-SpamScore: -33 X-BigFish: VPS-33(z21eWz1432R98dN936eM4015La4a4ka594izz1202hzzz32i203h6bh43j61h) X-Spam-TCS-SCL: 0:0 X-WSS-ID: 0KOXKJ1-01-1QV-02 X-M-MSG: Date: Tue, 25 Aug 2009 13:42:33 +0200 From: Andreas Herrmann To: James Dingwall CC: linux-kernel@vger.kernel.org Subject: Re: BUG: 2.6.30.1 pv_ops kernel boot failure - bisected Message-ID: <20090825114233.GL20811@alberich.amd.com> References: <683099EDC3E36D40942EBF636EB88BF00701E35F@batmail1.corp.amdocs.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Disposition: inline In-Reply-To: <683099EDC3E36D40942EBF636EB88BF00701E35F@batmail1.corp.amdocs.com> User-Agent: Mutt/1.5.16 (2007-06-09) X-OriginalArrivalTime: 25 Aug 2009 11:42:33.0513 (UTC) FILETIME=[2297E190:01CA2579] Content-Transfer-Encoding: 8BIT Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, Aug 25, 2009 at 12:04:54PM +0100, James Dingwall wrote: > > Hi, > > I have encountered what appears to be a bug when using the 2.6.30 stable > series as a pv_ops kernel under Xen 3.4.1. The problem appears to have > been introduced with the following commit (provided I bisected it > correctly) > > commit bb9b409349f533a919b6b6d95698fbe6ff4aa209 > Author: Andreas Herrmann > Date: Mon Jun 8 15:55:09 2009 +0200 > > x86: Detect use of extended APIC ID for AMD CPUs > > When I try and boot the domU (xm create -c) I do not get any output. > With this commit reverted I can boot 2.6.30.5 pv_ops without issue, > output follows below. The system is a dual Opteron 242. If more > details about the hardware or configuration are required to debug this > please let me know. I'm willing to test any patches. So it seems that commit commit 2cb078603abb612e3bcd428fb8122c3d39e08832 Author: Jeremy Fitzhardinge Date: Wed Jul 22 09:59:35 2009 -0700 x86, amd: Don't probe for extended APIC ID if APICs are disabled If we've logically disabled apics, don't probe the PCI space for the AMD extended APIC ID. [ Impact: prevent boot crash under Xen. ] Signed-off-by: Jeremy Fitzhardinge Reported-by: Bastian Blank Signed-off-by: H. Peter Anvin needs to be added to 2.6.30.y for proper boot under Xen. James, can you test this please? Thanks, Andreas -- Operating | Advanced Micro Devices GmbH System | Karl-Hammerschmidt-Str. 34, 85609 Dornach b. München, Germany Research | Geschäftsführer: Thomas M. McCoy, Giuliano Meroni Center | Sitz: Dornach, Gemeinde Aschheim, Landkreis München (OSRC) | Registergericht München, HRB Nr. 43632