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authorEric Dumazet <eric.dumazet@gmail.com>2010-07-13 05:24:20 +0000
committerDavid S. Miller <davem@davemloft.net>2010-07-14 15:33:27 -0700
commit87fd308cfc6b2e880bf717a740bd5c58d2aed10c (patch)
tree15c27522669b08a6d26efbcd447abf3d78ad13fb /net/dcb
parent3a047bf87b1b6f69c62ab9fb28072c639cb7e2fa (diff)
net: skb_tx_hash() fix relative to skb_orphan_try()
commit fc6055a5ba31e2 (net: Introduce skb_orphan_try()) added early orphaning of skbs. This unfortunately added a performance regression in skb_tx_hash() in case of stacked devices (bonding, vlans, ...) Since skb->sk is now NULL, we cannot access sk->sk_hash anymore to spread tx packets to multiple NIC queues on multiqueue devices. skb_tx_hash() in this case only uses skb->protocol, same value for all flows. skb_orphan_try() can copy sk->sk_hash into skb->rxhash and skb_tx_hash() can use this saved sk_hash value to compute its internal hash value. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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