On 11/04/2013 12:35 PM, Jason Wang wrote: > 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.
Speak too fast, this is for sender. For receiver, you can do it by specifying guest_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 [email protected] >> 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 [email protected] > 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 [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
