redonkable/alistair23-linux
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net: add scheduler sync hint to tcp_prequeue().

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Decreases the odds wakee will suffer from frequent cache misses.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mike Galbraith 2010-03-03 04:46:50 +00:00 committed by David S. Miller
parent 8f37ada5b5
commit c839d30a41
1 changed files with 1 additions and 1 deletions
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2
include/net/tcp.h
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@ -939,7 +939,7 @@ static inline int tcp_prequeue(struct sock *sk, struct sk_buff *skb)
tp->ucopy.memory = 0;
} else if (skb_queue_len(&tp->ucopy.prequeue) == 1) {
wake_up_interruptible_poll(sk->sk_sleep,
wake_up_interruptible_sync_poll(sk->sk_sleep,
POLLIN | POLLRDNORM | POLLRDBAND);
if (!inet_csk_ack_scheduled(sk))
inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,