Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756786Ab0HDITI (ORCPT ); Wed, 4 Aug 2010 04:19:08 -0400 Received: from mx3.sophos.com ([74.202.89.160]:33440 "EHLO mx3.sophos.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755725Ab0HDITF convert rfc822-to-8bit (ORCPT ); Wed, 4 Aug 2010 04:19:05 -0400 From: Tvrtko Ursulin Organization: Sophos Plc To: Yinghai Lu Subject: Re: 2.6.35 hangs on early boot in KVM Date: Wed, 4 Aug 2010 09:18:57 +0100 User-Agent: KMail/1.13.5 (Linux/2.6.34-12-desktop; KDE/4.4.4; x86_64; ; ) CC: Avi Kivity , "linux-kernel@vger.kernel.org" , KVM list , "Eric W. Biederman" References: <201008031028.57263.tvrtko.ursulin@sophos.com> <201008031659.58736.tvrtko.ursulin@sophos.com> In-Reply-To: MIME-Version: 1.0 Message-ID: <201008040918.58318.tvrtko.ursulin@sophos.com> X-MIMETrack: Itemize by SMTP Server on Mercury/Servers/Sophos(Release 7.0.3|September 26, 2007) at 04/08/2010 09:18:59, Serialize by Router on Mercury/Servers/Sophos(Release 7.0.3|September 26, 2007) at 04/08/2010 09:18:59, Serialize complete at 04/08/2010 09:18:59 X-TNEFEvaluated: 1 Content-Transfer-Encoding: 8BIT Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2194 Lines: 55 On Tuesday 03 Aug 2010 21:57:48 Yinghai Lu wrote: > On Tue, Aug 3, 2010 at 8:59 AM, Tvrtko Ursulin > > wrote: > > On Tuesday 03 Aug 2010 16:17:20 Tvrtko Ursulin wrote: > >> On Tuesday 03 Aug 2010 15:57:03 Tvrtko Ursulin wrote: > >> > On Tuesday 03 Aug 2010 15:51:08 Avi Kivity wrote: > >> > > On 08/03/2010 12:28 PM, Tvrtko Ursulin wrote: > >> > > > I have basically built 2.6.35 with make oldconfig from a working > >> > > > 2.6.34. Latter works fine in kvm while 2.6.35 hangs very early. I > >> > > > see nothing after grub (have early printk and verbose bootup > >> > > > enabled), just a blinking VGA cursor and CPU at 100%. > >> > > > >> > > Please copy kvm@vger.kernel.org on kvm issues. > >> > > > >> > > > CONFIG_PRINTK_TIME=y > >> > > > >> > > Try disabling this as a workaround. > >> > > >> > I am in the middle of a bisect run with five builds left to go, > >> > currently I have: > >> > > >> > bad 537b60d17894b7c19a6060feae40299d7109d6e7 > >> > good 93c9d7f60c0cb7715890b1f9e159da6f4d1f5a65 > >> > >> Bisect is looking good, narrowed it to ten revisions, but I am not sure > >> to make it to the end today: > >> > >> bad cb41838bbc4403f7270a94b93a9a0d9fc9c2e7ea > >> good 41d59102e146a4423a490b8eca68a5860af4fe1c > > > > Bisect points the finger to "x86, ioapic: In mpparse use > > mp_register_ioapic" (cf7500c0ea133d66f8449d86392d83f840102632), so I am > > copying Eric. No idea whether this commit is solely to blame or it is a > > combined interaction with KVM, but I am sure you guys will know. > > > > If you want me to test something else please shout. > > please try attached patch, to see if it help. No luck (no visible difference, no output on VGA or serial console). (Btw there is a typo in pin_2_irq_leagcy so that you do not push it directly). Tvrtko Sophos Plc, The Pentagon, Abingdon Science Park, Abingdon, OX14 3YP, United Kingdom. Company Reg No 2096520. VAT Reg No GB 348 3873 20. -- 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/