path: root/net/8021q
diff options
authorHerbert Xu <herbert@gondor.apana.org.au>2009-02-08 18:00:37 +0000
committerDavid S. Miller <davem@davemloft.net>2009-02-08 20:22:18 -0800
commitaa4b9f533ed5a22952e038b9fac2447ccc682124 (patch)
tree91722b13a63dcd0e49695388e633cfa91b856b80 /net/8021q
parentgro: Remember number of held packets instead of counting every time (diff)
gro: Optimise Ethernet header comparison
This patch optimises the Ethernet header comparison to use 2-byte and 4-byte xors instead of memcmp. In order to facilitate this, the actual comparison is now carried out by the callers of the shared dev_gro_receive function. This has a significant impact when receiving 1500B packets through 10GbE. Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/8021q')
1 files changed, 3 insertions, 1 deletions
diff --git a/net/8021q/vlan_core.c b/net/8021q/vlan_core.c
index 378fa69d625a..70435af153f2 100644
--- a/net/8021q/vlan_core.c
+++ b/net/8021q/vlan_core.c
@@ -85,7 +85,9 @@ static int vlan_gro_common(struct napi_struct *napi, struct vlan_group *grp,
goto drop;
for (p = napi->gro_list; p; p = p->next) {
- NAPI_GRO_CB(p)->same_flow = p->dev == skb->dev;
+ NAPI_GRO_CB(p)->same_flow =
+ p->dev == skb->dev && !compare_ether_header(
+ skb_mac_header(p), skb_gro_mac_header(skb));
NAPI_GRO_CB(p)->flush = 0;