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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2010-04-29 00:31:51 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2010-04-29 00:31:51 +0200 |
| commit | f84af32cbca70a3c6d30463dc08c7984af11c277 (patch) | |
| tree | 06ede4b3ed91be899f8f29b4c7eb1fb76f1ade97 /net/ipv4/tcp_input.c | |
| parent | net: speedup udp receive path (diff) | |
| download | linux-f84af32cbca70a3c6d30463dc08c7984af11c277.tar.xz linux-f84af32cbca70a3c6d30463dc08c7984af11c277.zip | |
net: ip_queue_rcv_skb() helper
When queueing a skb to socket, we can immediately release its dst if
target socket do not use IP_CMSG_PKTINFO.
tcp_data_queue() can drop dst too.
This to benefit from a hot cache line and avoid the receiver, possibly
on another cpu, to dirty this cache line himself.
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/tcp_input.c')
| -rw-r--r-- | net/ipv4/tcp_input.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/ipv4/tcp_input.c b/net/ipv4/tcp_input.c index ae3ec15fb630..e82162c211bf 100644 --- a/net/ipv4/tcp_input.c +++ b/net/ipv4/tcp_input.c @@ -4367,6 +4367,7 @@ static void tcp_data_queue(struct sock *sk, struct sk_buff *skb) if (TCP_SKB_CB(skb)->seq == TCP_SKB_CB(skb)->end_seq) goto drop; + skb_dst_drop(skb); __skb_pull(skb, th->doff * 4); TCP_ECN_accept_cwr(tp, skb); |