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[V2,net,3/3] virtio-net: enable TSO/checksum offloads for Q-in-Q vlans

Message ID 1495558392-1238-4-git-send-email-vyasevic@redhat.com
State Superseded, archived
Delegated to: David Miller
Headers show

Commit Message

Vladislav Yasevich May 23, 2017, 4:53 p.m. UTC 
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@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Vladislav Yasevich <vyasevic@redhat.com>
---
 drivers/net/virtio_net.c | 1 +
 1 file changed, 1 insertion(+)
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Patch

diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index 665627c..ead7a58 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -2020,6 +2020,7 @@  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)