macvtap: unbreak receiving of gro skb with frag list

We don't have fraglist support in TAP_FEATURES. This will lead software segmentation of gro skb with frag list. Fixes by having frag list support in TAP_FEATURES. With this patch single session of netperf receiving were restored from about 5Gb/s to about 12Gb/s on mlx4. Fixes a567dd6 ("macvtap: simplify usage of tap_features") Cc: Vlad Yasevich <[email protected]> Cc: Michael S. Tsirkin <[email protected]> Signed-off-by: Jason Wang <[email protected]> Signed-off-by: David S. Miller <[email protected]>
iegor · Oct 23, 2015 · f23d538 · f23d538
1 parent fc4099f
commit f23d538
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c
@@ -137,7 +137,7 @@ static const struct proto_ops macvtap_socket_ops;
 #define TUN_OFFLOADS (NETIF_F_HW_CSUM | NETIF_F_TSO_ECN | NETIF_F_TSO | \
 		      NETIF_F_TSO6 | NETIF_F_UFO)
 #define RX_OFFLOADS (NETIF_F_GRO | NETIF_F_LRO)
-#define TAP_FEATURES (NETIF_F_GSO | NETIF_F_SG)
+#define TAP_FEATURES (NETIF_F_GSO | NETIF_F_SG | NETIF_F_FRAGLIST)
 
 static struct macvlan_dev *macvtap_get_vlan_rcu(const struct net_device *dev)
 {