This is a note to let you know that I've just added the patch titled virtio-net: enable TSO/checksum offloads for Q-in-Q vlans to the 4.11-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: virtio-net-enable-tso-checksum-offloads-for-q-in-q-vlans.patch and it can be found in the queue-4.11 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From foo@baz Wed May 31 09:13:10 JST 2017 From: Vlad Yasevich <vyasevich@xxxxxxxxx> Date: Tue, 23 May 2017 13:38:43 -0400 Subject: virtio-net: enable TSO/checksum offloads for Q-in-Q vlans From: Vlad Yasevich <vyasevich@xxxxxxxxx> [ Upstream commit 2836b4f224d4fd7d1a2b23c3eecaf0f0ae199a74 ] Since virtio does not provide it's own ndo_features_check handler, TSO, and now checksum offload, are disabled for stacked vlans. Re-enable the support and let the host take care of it. This restores/improves Guest-to-Guest performance over Q-in-Q vlans. Acked-by: Jason Wang <jasowang@xxxxxxxxxx> Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx> Signed-off-by: Vladislav Yasevich <vyasevic@xxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/virtio_net.c | 1 + 1 file changed, 1 insertion(+) --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -1894,6 +1894,7 @@ static const struct net_device_ops virtn .ndo_poll_controller = virtnet_netpoll, #endif .ndo_xdp = virtnet_xdp, + .ndo_features_check = passthru_features_check, }; static void virtnet_config_changed_work(struct work_struct *work) Patches currently in stable-queue which might be from vyasevich@xxxxxxxxx are queue-4.11/vlan-fix-tcp-checksum-offloads-in-q-in-q-vlans.patch queue-4.11/be2net-fix-offload-features-for-q-in-q-packets.patch queue-4.11/virtio-net-enable-tso-checksum-offloads-for-q-in-q-vlans.patch queue-4.11/sctp-fix-icmp-processing-if-skb-is-non-linear.patch