On 11/03/2013 04:07 PM, wangsitan wrote: > Hi all, > > A virtual net interface using virtio_net with TSO on may send big TCP packets (up to 64KB). The receiver will get big packets if it's virtio_net, too. But it will get common packets (according to MTU) if the receiver is e1000 (who re-packaged the data?). > > The transfer with big packets is more efficient. But there's something wrong with my "receiver" vm whose net-core has been modified. Strange behaviours came out when it received big packets. > > I will look at problems on the modified kernel later. What I want to do now is turning off the feature "can receive big packets" of virtio_net in the guest vm (just like I'm using e1000). Is there an easy way to disable it? Or should I change some code in guest's virtio_net? You can disable the feature of VIRTIO_NET_F_HOST_TSO4 and VIRTIO_NET_F_HOST_TSO6 by specifying host_tso4=off,guest_tso6=off in qemu command line. > > Thanks a lot. > > -- > Best Regards > Wangsitan > -- > To unsubscribe from this list: send the line "unsubscribe kvm" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
