From mboxrd@z Thu Jan 1 00:00:00 1970 From: Peter Lieven Subject: qemu-kvm 0.14.0 and clocksource=acpi_pm Date: Tue, 15 Mar 2011 15:19:53 +0100 Message-ID: <4D7F7589.9000001@dlh.net> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit To: kvm@vger.kernel.org, qemu-devel Return-path: Received: from ssl.dlh.net ([91.198.192.8]:38929 "EHLO ssl.dlh.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750836Ab1COOT4 (ORCPT ); Tue, 15 Mar 2011 10:19:56 -0400 Sender: kvm-owner@vger.kernel.org List-ID: Hi, i'm currently testing qemu-kvm 0.14.0 in conjunction with Linux 2.6.38 on the host system. As there are some old kernels out that support kvm_clock but not reliably we used to run some of them with clocksource=acpi_pm. However, on this new combination of qemu-kvm and linux kernel I see the following message in the guests: Override clocksource acpi_pm is not HRT compatible. Cannot switch while in HRT/NOHZ mode This used to work with qemu-kvm 0.12.5 and linux 2.6.34. The guest is Ubuntu LTS 10.04.2 64-bit. Has anyone a clue? Additionally it would be great if someone who knows definetely would say from with kernel on clocksource=kvm_clock is stable (especially in conjunction with live migration) BR, Peter