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>
---
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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