Commit c839d30a authored by Mike Galbraith's avatar Mike Galbraith Committed by David S. Miller
Browse files

net: add scheduler sync hint to tcp_prequeue(). 



Decreases the odds wakee will suffer from frequent cache misses.

Signed-off-by: default avatarMike Galbraith <efault@gmx.de>
Signed-off-by: default avatarDavid 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,