From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: paravirtual drivers? Date: Thu, 12 Apr 2007 14:30:22 +0300 Message-ID: <461E184E.6090409@qumranet.com> References: <461DFE2E.3020805@wpkg.org> <461E008F.8030701@qumranet.com> <461E034F.9050608@wpkg.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: Tomasz Chmielewski Return-path: In-Reply-To: <461E034F.9050608-Nem3ZqsbT/g@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Tomasz Chmielewski wrote: >>> >>> What is the state of these PV drivers now? Is it usable on Linux now? >>> >> >> We (Qumranet) have Linux paravirtual network support working, but not >> ready for general consumption yet. > > Hmm, is the "general consumption" of the network support a matter of > weeks, or months rather? Hopefully it will be included in kvm releases in a few weeks, but perhaps not as efficient as we'd like, and it would be without commitment to ABI stability (i.e. you may have to install a new guest driver after updating the host). An ABI-stable driver will be available on a longer time frame. We're still hashing out things like where the host-side driver belongs. There are known performance issues with the current driver (though it's magnitudes better than the qemu devices). I'm toying with the idea of sharing the Xen drivers. > And what about the block device? As I understand, using SCSI emulation > gives better results, but still, there will be a noticeable difference > when compared to the "native speed". > We're not working on block devices at the moment, and I have no performance figures on scsi vs. ide vs. paravirt. -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV