| From | Kamal Mostafa <> | Subject | [PATCH 3.19.y-ckt 009/164] macvtap: unbreak receiving of gro skb with frag list | Date | Wed, 2 Dec 2015 08:57:40 -0800 |
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3.19.8-ckt11 -stable review patch. If anyone has any objections, please let me know.
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From: Jason Wang <jasowang@redhat.com>
[ Upstream commit f23d538bc24a83c16127c2eb82c9cf1adc2b5149 ]
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 a567dd6252 ("macvtap: simplify usage of tap_features") Cc: Vlad Yasevich <vyasevic@redhat.com> Cc: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Kamal Mostafa <kamal@canonical.com> --- drivers/net/macvtap.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/macvtap.c b/drivers/net/macvtap.c index 84e835e..73437568 100644 --- a/drivers/net/macvtap.c +++ b/drivers/net/macvtap.c @@ -82,7 +82,7 @@ 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) { -- 1.9.1
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