From mboxrd@z Thu Jan 1 00:00:00 1970 From: Subject: Re: GPLPV and pci passthrough Date: Mon, 30 Jan 2012 14:18:30 -0500 Message-ID: References: <6035A0D088A63A46850C3988ED045A4B054FE179@BITCOM1.int.sbss.com.au> <6035A0D088A63A46850C3988ED045A4B0550711F@BITCOM1.int.sbss.com.au> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-class: urn:content-classes:message In-Reply-To: <6035A0D088A63A46850C3988ED045A4B0550711F@BITCOM1.int.sbss.com.au> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: James Harper , lta@akr.fm Cc: xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org > > > > I tried the Win2003 build and it works like a charm, and has native > > performance across my gbit network in at least one direction. > > > > Right... so if I understand the problem: > > . NDIS5 driver works fine under Windows 7 with PCI passthrough > . NDIS6 driver works fine under Windows 7 with no PCI passthrough > . NDIS6 driver does not work correctly with PCI passthrough Correct. > > Can you now try turning off all offloads in the DomU and see if starts > working at some point? I disabled CSum offload, Large Send Offload, and scatter gather. No help. I also set HKLM\System\CurrentControlSet\services\tcpip\Parameters\DisableTaskOfflo ad=1. Also no help. > > I'm at a loss to explain how this could happen though. > If I think of anything else I'll try it. Would it help to try a 32bit Windows 7 instance and see if there's any difference?