On 20/05/2015 15:21, "Traynor, Kevin" <kevin.tray...@intel.com> wrote:
> > >> -----Original Message----- > >> From: Daniele Di Proietto [mailto:diproiet...@vmware.com] > >> Sent: Wednesday, May 20, 2015 1:47 PM > >> To: 钢锁0310 > >> Cc: 通天晓0280; discuss; Traynor, Kevin > >> Subject: Re: [ovs-discuss] For help about ssh between vms through >>ovs-dkdp > >> > >> This might be related to offloading features. > >> > >> Could you try again with this qemu "-device" option and let us know? > >> -device > >> >>virtio-net-pci,netdev=net1,csum=off,gso=off,guest_tso4=off,guest_tso6=off >>,g > >> uest_ecn=off > > > >I checked this previously and the DPDK vhost lib will report those >features > >as not available during negotiation so you should be ok with not >specifying > >them explicitly in the qemu cmd line. I haven't tested with qemu 2.3. > > > >> > >> > >> Kevin, do you this we should mention this in INSTALL.DPDk.md? > > > >I had changed the original patch to make it optional in 3a based on >feedback > >from Michael Tsirkin and testing. So unless we find an issue, I'd prefer >to > >leave optional. > >https://urldefense.proofpoint.com/v2/url?u=https-3A__github.com_openvswitc >h_ovs_blob_master_INSTALL.DPDK.md-23dpdk-2Dvhost-2Dvm-2Dconfiguration&d=Aw >IGoQ&c=Sqcl0Ez6M0X8aeM67LKIiDJAXVeAw-YihVMNtXt-uEs&r=SmB5nZacmXNq0gKCC1s_C >w5yUNjxgD4v5kJqZ2uWLlE&m=iM-aCjDqF2zfP98Zeafj9Z78WnCYvkzPSyZeV1kVGWg&s=SOm >_egKoAfzUwWioueTrQ9W2sa_WSUwKC74LO5SNvWs&e= > If I don't add the extra options, my guests (Debian wheezy kernel 3.2 and Ubuntu 14.04 kernel 3.13, running on QEMU 2.1.3) see these features # ethtool -k eth0 Features for eth0: rx-checksumming: off [fixed] tx-checksumming: on tx-checksum-ipv4: off [fixed] tx-checksum-unneeded: off [fixed] tx-checksum-ip-generic: on tx-checksum-ipv6: off [fixed] tx-checksum-fcoe-crc: off [fixed] tx-checksum-sctp: off [fixed] scatter-gather: on tx-scatter-gather: on tx-scatter-gather-fraglist: on tcp-segmentation-offload: on tx-tcp-segmentation: on tx-tcp-ecn-segmentation: on tx-tcp6-segmentation: on udp-fragmentation-offload: on generic-segmentation-offload: on generic-receive-offload: on large-receive-offload: off [fixed] [...] Pings work, but everything else (e.g. DNS lookups) doesn't. To fix the setup I have either to add the extra options or to disable the offloads (inside the guest) with ethtool -K eth0 tx off _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
