From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Daniel P. Berrange" Subject: Re: [RFC] Unify KVM kernel-space and user-space code into a single project Date: Thu, 18 Mar 2010 13:44:57 +0000 Message-ID: <20100318134457.GH22775@redhat.com> References: <4BA1E24B.6090904@redhat.com> <20100318085607.GB2157@elte.hu> <20100318101025.GA13073@elte.hu> <4BA1FEB0.7000400@redhat.com> <20100318113527.GA13168@elte.hu> <20100318130226.GB7424@elte.hu> <4BA22663.7070509@redhat.com> <20100318133124.GA25642@elte.hu> Reply-To: "Daniel P. Berrange" Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: Avi Kivity , "Frank Ch. Eigler" , Alexander Graf , Anthony Liguori , "Zhang, Yanmin" , Peter Zijlstra , Sheng Yang , linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Marcelo Tosatti , oerg Roedel , Jes Sorensen , Gleb Natapov , Zachary Amsden , ziteng.huang@intel.com, Arnaldo Carvalho de Melo , Fr?d?ric Weisbecker To: Ingo Molnar Return-path: Received: from mx1.redhat.com ([209.132.183.28]:21539 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753474Ab0CRNpV (ORCPT ); Thu, 18 Mar 2010 09:45:21 -0400 Content-Disposition: inline In-Reply-To: <20100318133124.GA25642@elte.hu> Sender: kvm-owner@vger.kernel.org List-ID: On Thu, Mar 18, 2010 at 02:31:24PM +0100, Ingo Molnar wrote: > > * Avi Kivity wrote: > > > On 03/18/2010 03:02 PM, Ingo Molnar wrote: > > > > > >> [...] What users eagerly replace their kernels? > > > > > > Those 99% who click on the 'install 193 updates' popup. > > > > > > > Of which 1 is the kernel, and 192 are userspace updates (of which one may be > > qemu). > > I think you didnt understand my (tersely explained) point - which is probably > my fault. What i said is: > > - distros update the kernel first. Often in stable releases as well if > there's a new kernel released. (They must because it provides new hardware > enablement and other critical changes they generally cannot skip.) > > - Qemu on the other hand is not upgraded with (nearly) that level of urgency. > Completely new versions will generally have to wait for the next distro > release. This has nothing todo with them being in separate source repos. We could update QEMU to new major feature releaes with the same frequency in a Fedora release, but we delibrately choose not to rebase the QEMU userspace because experiance has shown the downside from new bugs / regressions outweighs the benefit of any new features. The QEMU updates in stable Fedora trees, now just follow the minor bugfix release stream provided by QEMU & those arrive in Fedora with little noticable delay. Daniel -- |: Red Hat, Engineering, London -o- http://people.redhat.com/berrange/ :| |: http://libvirt.org -o- http://virt-manager.org -o- http://deltacloud.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: GnuPG: 7D3B9505 -o- F3C9 553F A1DA 4AC2 5648 23C1 B3DF F742 7D3B 9505 :|