From mboxrd@z Thu Jan 1 00:00:00 1970 From: Konrad Rzeszutek Wilk Subject: Re: NIC: Queue assignment to guest OS Date: Tue, 19 Apr 2011 16:45:32 -0400 Message-ID: <20110419204532.GA13003@dumpdata.com> References: <003801cbfb0a$de67a410$9b36ec30$@com> <20110419184750.GB7427@dumpdata.com> <8DE07D65-675C-4AF7-8B4F-AA643173250F@nucleodyne.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <8DE07D65-675C-4AF7-8B4F-AA643173250F@nucleodyne.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Kallol Biswas Cc: "xen-devel@lists.xensource.com" List-Id: xen-devel@lists.xenproject.org On Tue, Apr 19, 2011 at 11:50:35AM -0700, Kallol Biswas wrote: > Unfortunately other frameworks are not open source, and we can not use the design and expose to all. Please don't top post. > > On Apr 19, 2011, at 11:47 AM, Konrad Rzeszutek Wilk wrote: > > > On Thu, Apr 14, 2011 at 06:17:17PM -0700, Kallol Biswas wrote: > >> Hi, > >> > >> I have a requirement to assign the transmit and receive queues of a NIC > >> card to different guest operating systems so that the guests can directly > >> submit transmit requests to controller and receive packets from NIC > >> controller without going through a middle layer. The NIC controller is not > >> SRIOV capable and there are a few MSI-X vectors available. > > > > OK. So you want to "export" the rx and tx queue (where each queue is associated > > with an MSI-X) in the guest. > > > >> > >> > >> > >> What would be the best way to implement the requirement in Xen? I am new to > >> Xen but have experience in a similar virtualization framework. > > > > How did you do this in other virtualization frameworks? I am still at loss here how you guys managed this without ripping the network driver of a NIC card and passed the MSI-X to a guest and the full PCI device to _all_ of them and managed to negotiate some form of locking.