From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: kvm or qemu-kvm? Date: Thu, 01 Oct 2009 20:35:30 +0200 Message-ID: <4AC4F672.8040908@redhat.com> References: <1254277318.17951.26.camel@markov.biostat.ucsf.edu> <4AC4DBEF.5060408@redhat.com> <1254415862.15462.30.camel@corn.betterworld.us> <20091001180635.GA32224@psychosis.jim.sh> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Ross Boylan , kvm-devel To: Jim Paris Return-path: Received: from mx1.redhat.com ([209.132.183.28]:12320 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751853AbZJASg3 (ORCPT ); Thu, 1 Oct 2009 14:36:29 -0400 In-Reply-To: <20091001180635.GA32224@psychosis.jim.sh> Sender: kvm-owner@vger.kernel.org List-ID: On 10/01/2009 08:06 PM, Jim Paris wrote: > That's what I do. Just as a warning, if you're using the libvirt > packages from Debian unstable, make sure you also install > linux-libc-dev from unstable before building qemu-kvm. > > Otherwise, virtio networking will fail. The reason is that qemu-kvm > will be built against the Lenny linux-libc-dev which does not have > IFF_VNET_HDR, while the libvirt was built against a newer > linux-libc-dev that did define IFF_VNET_HDR. If they don't agree then > things break. > Isn't that a libvirt bug? libvirt shouldn't assume qemu supports IFF_VNET_HDR just because it sees it. -- Do not meddle in the internals of kernels, for they are subtle and quick to panic.