From 4b1b865e4e97e336316f30e32af36d71e98bdabc Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Tue, 15 Sep 2015 15:24:28 -0700 Subject: [PATCH] bonding: use l4 hash if available If skb carries a l4 hash, no need to perform a flow dissection. Performance is slightly better : lpaa5:~# ./super_netperf 200 -H lpaa6 -t TCP_RR -l 100 2.39012e+06 lpaa5:~# ./super_netperf 200 -H lpaa6 -t TCP_RR -l 100 2.39393e+06 lpaa5:~# ./super_netperf 200 -H lpaa6 -t TCP_RR -l 100 2.39988e+06 After patch : lpaa5:~# ./super_netperf 200 -H lpaa6 -t TCP_RR -l 100 2.43579e+06 lpaa5:~# ./super_netperf 200 -H lpaa6 -t TCP_RR -l 100 2.44304e+06 lpaa5:~# ./super_netperf 200 -H lpaa6 -t TCP_RR -l 100 2.44312e+06 Signed-off-by: Eric Dumazet Cc: Tom Herbert Cc: Mahesh Bandewar Signed-off-by: David S. Miller --- drivers/net/bonding/bond_main.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 771a449d2f56..90f2615428c0 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -3136,6 +3136,10 @@ u32 bond_xmit_hash(struct bonding *bond, struct sk_buff *skb) struct flow_keys flow; u32 hash; + if (bond->params.xmit_policy == BOND_XMIT_POLICY_ENCAP34 && + skb->l4_hash) + return skb->hash; + if (bond->params.xmit_policy == BOND_XMIT_POLICY_LAYER2 || !bond_flow_dissect(bond, skb, &flow)) return bond_eth_hash(skb); -- 2.20.1