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Commit c839d30a authored Mar 03, 2010 by Mike Galbraith Committed by David S. Miller Mar 04, 2010

net: add scheduler sync hint to tcp_prequeue().



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>

parent 8f37ada5

include/net/tcp.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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,