From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mark McLoughlin Subject: Re: Questions about relation between kernel version and KVM userspace version Date: Fri, 23 Jan 2009 09:34:02 +0000 Message-ID: <1232703242.5115.68.camel@blaa> References: <39583.1232668043@kelu.dk> Reply-To: Mark McLoughlin Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: kelu@kelu.dk Return-path: Received: from mx2.redhat.com ([66.187.237.31]:38933 "EHLO mx2.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754721AbZAWJeJ (ORCPT ); Fri, 23 Jan 2009 04:34:09 -0500 In-Reply-To: <39583.1232668043@kelu.dk> Sender: kvm-owner@vger.kernel.org List-ID: On Fri, 2009-01-23 at 00:47 +0100, Kenni Lund wrote: > I've been wondering about something for a while: How does the version > of the kernel module and the version of the KVM userspace relate? Eg. > if you run with a newer 2.6.27-2.6.28 kernel with the modules > included, will you then benefit from using the modules from the latest > KVM release together with the latest KVM userspace, or isn't it worth > the effort? There are a number of ways of thinking about this: * if you want to help out with KVM development and testing, using the latest released kvm.ko with your currently installed kernel might be a good idea. If you want to get really hard-core, use Avi's kernel git tree. * if you just want some KVM feature that isn't in your currently installed kernel, the latest released kvm.ko might make sense. * if your main concern is stability, use an unmodified kernel release and stable updates - e.g. 2.6.27.x or 2.6.28.x Which version of kvm-userspace/qemu you use is a very different story - unless you have a very old kernel version, just use the latest release kvm/qemu release. Cheers, Mark.