On Thu, May 18, 2017 at 09:31:05AM -0400, Vladislav Yasevich wrote:
> 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.
>
> CC: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
> CC: Jason Wang <jasowang@xxxxxxxxxx>
> CC: virtualization@xxxxxxxxxxxxxxxxxxxxxxxxxx
> Signed-off-by: Vladislav Yasevich <vyasevic@xxxxxxxxxx>
Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
> ---
> drivers/net/virtio_net.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> index 8324a5e..341fb96 100644
> --- a/drivers/net/virtio_net.c
> +++ b/drivers/net/virtio_net.c
> @@ -2028,6 +2028,7 @@ static const struct net_device_ops virtnet_netdev = {
> .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)
> --
> 2.7.4
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