From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: [PATCH 0/16 v6] PCI: Linux kernel SR-IOV support Date: Sun, 09 Nov 2008 14:47:51 +0200 Message-ID: <4916DBF7.7070501@redhat.com> References: <20081106154351.GA30459@kroah.com> <894107.30288.qm@web45108.mail.sp1.yahoo.com> <20081106164919.GA4099@kroah.com> <0199E0D51A61344794750DC57738F58E5E26F996C4@GVW1118EXC.americas.hpqcorp.net> <20081106183630.GD11773@parisc-linux.org> <491371F0.7020805@codemonkey.ws> <20081106225854.GA15439@parisc-linux.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20081106225854.GA15439@parisc-linux.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: virtualization-bounces@lists.linux-foundation.org Errors-To: virtualization-bounces@lists.linux-foundation.org To: Matthew Wilcox Cc: "randy.dunlap@oracle.com" , "kvm@vger.kernel.org" , "grundler@parisc-linux.org" , "Chiang, Alexander" , Greg KH , "rdreier@cisco.com" , "linux-kernel@vger.kernel.org" , "jbarnes@virtuousgeek.org" , "virtualization@lists.linux-foundation.org" , Anthony Liguori , "linux-pci@vger.kernel.org" , "mingo@elte.hu" List-Id: virtualization@lists.linuxfoundation.org Matthew Wilcox wrote: >> What we would rather do in KVM, is have the VFs appear in the host as >> standard network devices. We would then like to back our existing PV >> driver to this VF directly bypassing the host networking stack. A key >> feature here is being able to fill the VF's receive queue with guest >> memory instead of host kernel memory so that you can get zero-copy >> receive traffic. This will perform just as well as doing passthrough >> (at least) and avoid all that ugliness of dealing with SR-IOV in the guest. >> > > This argues for ignoring the SR-IOV mess completely. It does, but VF-in-host is not the only model that we want to support. It's just the most appealing. There will definitely be people who want to run VF-in-guest. -- error compiling committee.c: too many arguments to function