Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759238Ab1CDPN4 (ORCPT ); Fri, 4 Mar 2011 10:13:56 -0500 Received: from mx1.redhat.com ([209.132.183.28]:56607 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750757Ab1CDPNz (ORCPT ); Fri, 4 Mar 2011 10:13:55 -0500 Message-ID: <4D7101AF.6060009@redhat.com> Date: Fri, 04 Mar 2011 10:13:51 -0500 From: Zachary Amsden User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.10) Gecko/20100621 Fedora/3.0.5-1.fc13 Thunderbird/3.0.5 MIME-Version: 1.0 To: Nikola Ciprich CC: Avi Kivity , Nikola Ciprich , KVM list , Linux kernel list , Glauber Costa Subject: Re: regression - 2.6.36 -> 2.6.37 - kvm - 32bit SMP guests don't boot References: <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> <20110303070652.GG29840@pcnci.linuxbox.cz> <4D6FFE5D.1030401@redhat.com> <20110303210647.GA27691@nik-comp.lan> <4D700F09.9000002@redhat.com> <20110303220155.GB27691@nik-comp.lan> In-Reply-To: <20110303220155.GB27691@nik-comp.lan> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 954 Lines: 22 On 03/03/2011 05:01 PM, Nikola Ciprich wrote: >> That sounds like a kernel which will be vulnerable to broken KVM clock >> on 32-bit. There's a kernel side fix that is needed, but why the server >> side change triggers the problem needs more investigation. >> > OK, it's important for me that I can fix this by kernel parameter, > but if I can help somehow with debugging, please let me know. > thanks for Your time! > nik > You don't see any messages about TSC being unstable or switching clocksource after loading the KVM module? And you are not suspending the host or anything? Can you try using "processor.max_cstate=1" on the host as a kernel parameter and see if it makes a difference? -- 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/