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Commit f23d538b authored by Jason Wang's avatar Jason Wang Committed by David S. Miller
Browse files

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 a567dd62 ("macvtap: simplify usage of tap_features")
Cc: Vlad Yasevich <vyasevic@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fc4099f1

drivers/net/macvtap.c

+1 −1
Original line number Diff line number Diff line
@@ -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)

{