From: David S. Miller Date: Tue, 7 Feb 2017 15:05:13 +0000 (-0500) Subject: Merge branch 'virtio_net-XDP-adjust_head' X-Git-Tag: v4.14-rc1~1463^2~207 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=108d9c71dcff8fc2523861b3462ab2ba8a754ed9;p=platform%2Fkernel%2Flinux-rpi.git Merge branch 'virtio_net-XDP-adjust_head' John Fastabend says: ==================== XDP adjust head support for virtio This series adds adjust head support for virtio. The following is my test setup. I use qemu + virtio as follows, ./x86_64-softmmu/qemu-system-x86_64 \ -hda /var/lib/libvirt/images/Fedora-test0.img \ -m 4096 -enable-kvm -smp 2 -netdev tap,id=hn0,queues=4,vhost=on \ -device virtio-net-pci,netdev=hn0,mq=on,guest_tso4=off,guest_tso6=off,guest_ecn=off,guest_ufo=off,vectors=9 In order to use XDP with virtio until LRO is supported TSO must be turned off in the host. The important fields in the above command line are the following, guest_tso4=off,guest_tso6=off,guest_ecn=off,guest_ufo=off Also note it is possible to conusme more queues than can be supported because when XDP is enabled for retransmit XDP attempts to use a queue per cpu. My standard queue count is 'queues=4'. After loading the VM I run the relevant XDP test programs in, ./sammples/bpf For this series I tested xdp1, xdp2, and xdp_tx_iptunnel. I usually test with iperf (-d option to get bidirectional traffic), ping, and pktgen. I also have a modified xdp1 that returns XDP_PASS on any packet to ensure the normal traffic path to the stack continues to work with XDP loaded. It would be great to automate this soon. At the moment I do it by hand which is starting to get tedious. v2: original series dropped trace points after merge. ==================== Acked-by: Michael S. Tsirkin Signed-off-by: David S. Miller --- 108d9c71dcff8fc2523861b3462ab2ba8a754ed9