From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:35425) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T1IfX-0002We-VJ for qemu-devel@nongnu.org; Tue, 14 Aug 2012 11:04:36 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1T1IfS-0006Mx-07 for qemu-devel@nongnu.org; Tue, 14 Aug 2012 11:04:31 -0400 Received: from david.siemens.de ([192.35.17.14]:22794) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1T1IfR-0006Mr-Lz for qemu-devel@nongnu.org; Tue, 14 Aug 2012 11:04:25 -0400 Message-ID: <502A68F4.1080009@siemens.com> Date: Tue, 14 Aug 2012 17:04:20 +0200 From: Jan Kiszka MIME-Version: 1.0 References: <20120801050241.22163.78549.stgit@bling.home> <87pq6uvs52.fsf@codemonkey.ws> <502907EA.9030606@redhat.com> <5029097B.8050706@siemens.com> <87393qmvwe.fsf@codemonkey.ws> <502A6669.90200@redhat.com> In-Reply-To: <502A6669.90200@redhat.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 0/3] VFIO-based PCI device assignment for QEMU 1.2 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Cole Robinson Cc: Anthony Liguori , "kvm@vger.kernel.org" , "aik@ozlabs.ru" , "qemu-devel@nongnu.org" , Alex Graf , Alex Williamson , Avi Kivity On 2012-08-14 16:53, Cole Robinson wrote: > On 08/13/2012 03:31 PM, Anthony Liguori wrote: >> Jan Kiszka writes: >> >>> On 2012-08-13 15:58, Avi Kivity wrote: >>>> On 08/13/2012 04:27 PM, Anthony Liguori wrote: >>>> >>>>> Thanks for pushing this forward! Hopefully this will finally kill off >>>>> qemu-kvm.git for good. >>>> >>>> No, it won't. vfio requires a 3.6 kernel, which we cannot assume anyone >>>> has. We'll need the original device assignment code side-by-side. >>> >>> ...which is on my to-do list for 1.3. >> >> Is there a deprecation plan for the old device assignment code? >> >> I'm not really against the idea of requiring a new kernel for new >> features. >> >> From a Fedora/OpenSUSE point of view, would supporting old kernels be a >> requirement to stop shipping qemu-kvm.git over qemu.git? >> > > Speaking as a Fedora maintainer, compatibility with old kernels isn't that > important to us, provided the functionality of the new way is comparable to > the old way. > > As far as switching over to qemu.git, I assume there will eventually be a day > when the fork would 'end' and qemu-kvm would stop getting its own releases, > which is when we'd switch. Maybe that assumption is wrong or over simplifying > the trade offs, but if merge work is ongoing I don't see a very compelling > reason to switch. If you sit and wait, you may find out on that specific day that someone forget to port over feature X and Y, and now QEMU does not fit your needs and qemu-kvm is dead. Jan -- Siemens AG, Corporate Technology, CT RTC ITP SDP-DE Corporate Competence Center Embedded Linux