From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Assmann Subject: Re: [Qemu-devel] PCI passthrough of 40G ethernet interface (Openstack/KVM) Date: Mon, 23 Mar 2015 08:19:12 +0100 Message-ID: <550FBE70.40201@redhat.com> References: <550A85B3.4070703@redhat.com> <550ADAD2.8070506@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Cc: Shannon Nelson , Bandan Das , Alex Williamson , QEMU Developers , kvm-devel , netdev@vger.kernel.org To: jacob jacob Return-path: In-Reply-To: Sender: kvm-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 20.03.2015 21:55, jacob jacob wrote: > On Thu, Mar 19, 2015 at 10:18 AM, Stefan Assmann wrote: >> On 19.03.2015 15:04, jacob jacob wrote: >>> Hi Stefan, >>> have you been able to get PCI passthrough working without any issues >>> after the upgrade? >> >> My XL710 fails to transfer regular TCP traffic (netperf). If that works >> for you then you're already one step ahead of me. Afraid I can't help >> you there. > > I have data transfer working when trying the test runs on the host > itself. Are you seeing problems when directly trying the TCP traffic > from the host itself? Correct. > The issues that i am seeing are specific to the case when the devices > are passed via PCI passthrough into the VM. > > Any ideas whether this would be a kvm/qemu or i40e driver issue? > (Updating to the latest firmware and using latest i40e driver didn't > seem to help.) Hard to say, that's probably something for Intel to look into. Stefan