Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754497AbYLVK5v (ORCPT ); Mon, 22 Dec 2008 05:57:51 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1752890AbYLVK5l (ORCPT ); Mon, 22 Dec 2008 05:57:41 -0500 Received: from smtp4.netcologne.de ([194.8.194.137]:57546 "EHLO smtp4.netcologne.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752731AbYLVK5k (ORCPT ); Mon, 22 Dec 2008 05:57:40 -0500 Date: Mon, 22 Dec 2008 11:57:38 +0100 From: Max Kellermann To: Jan Niehusmann Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: KVM guest lockup Message-ID: <20081222105738.GA27409@squirrel.roonstrasse.net> Mail-Followup-To: Jan Niehusmann , kvm@vger.kernel.org, linux-kernel@vger.kernel.org References: <20081219174401.GA2730@squirrel.roonstrasse.net> <20081221115538.GA25958@x61s.gondor.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20081221115538.GA25958@x61s.gondor.com> User-Agent: Mutt/1.5.18 (2008-05-17) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 708 Lines: 17 On 2008/12/21 12:55, Jan Niehusmann wrote: > As I observed such behaviour only when the host has frequency > scaling activated: Could it be that in this case, > clocksource_read(clock) on the guest is misbehaving? Indeed, the host had governor=ondemand. After the switch to "performance", the guest seems to run stable. So this is a bug in the guest kernel, by making wrong assumptions on the clock values retrieved from the host, right? Max -- 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/