Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754570Ab1CCHI5 (ORCPT ); Thu, 3 Mar 2011 02:08:57 -0500 Received: from gwu.lbox.cz ([62.245.111.132]:53842 "EHLO gwu.lbox.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750910Ab1CCHI4 (ORCPT ); Thu, 3 Mar 2011 02:08:56 -0500 Date: Thu, 3 Mar 2011 08:06:52 +0100 From: Nikola Ciprich To: Zachary Amsden Cc: Avi Kivity , Nikola Ciprich , KVM list , Linux kernel list Subject: Re: regression - 2.6.36 -> 2.6.37 - kvm - 32bit SMP guests don't boot Message-ID: <20110303070652.GG29840@pcnci.linuxbox.cz> References: <20110225104823.GD29840@pcnci.linuxbox.cz> <4D67C077.6060108@redhat.com> <20110227172052.GB2474@nik-comp.lan> <4D6BA85B.7080908@redhat.com> <20110228143247.GE29840@pcnci.linuxbox.cz> <4D6BBC84.6020408@redhat.com> <20110228152823.GF29840@pcnci.linuxbox.cz> <4D6BC5CA.8060004@redhat.com> <20110228171550.GA2173@nik-comp.lan> <4D6EF536.305@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <4D6EF536.305@redhat.com> User-Agent: Mutt/1.5.19 (2009-01-05) X-Antivirus: on lbxovapx by Kaspersky antivirus, 4703390 records (last update: 20110302) X-Spam-Score: N/A (trusted relay) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1859 Lines: 57 > No worries. What mess? twice sending the same mail, nevermind :) > > I have two things you can try: > > first is running a single VCPU guest, if you have not done so already. yup, UP guest is fine, just SMP doesn't work. > Second is adding the bootparameter "clocksource=acpi_pm" to your guest > kernel. yes, this makes SMP work too! I just realized when You were asking about current clocksource, I told You only host source, not the guest. So I checked now, and (at least for UP, I guess for SMP it's the same), the clocksource is kvm-clock! So seems like it got broken with the TSC changes? > > If either of those fixes the problem, it very well have to do with this > change and not that you may be missing later dependent patches. This > change should be nearly a 1-1 transformation, and if it is not, > something is wrong. > > What branch are you bisecting on, the kvm branch or the kernel tree > itself? It would be helpful to see the exact code in case any > surrouding logic changed. I was bisecting linus' linux-2.6.git main branch, between 2.6.36..2.6.37 > > Thanks, > > Zach > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- ------------------------------------- Ing. Nikola CIPRICH LinuxBox.cz, s.r.o. 28. rijna 168, 709 01 Ostrava tel.: +420 596 603 142 fax: +420 596 621 273 mobil: +420 777 093 799 www.linuxbox.cz mobil servis: +420 737 238 656 email servis: servis@linuxbox.cz ------------------------------------- -- 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/