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Commit 7aedec2a authored May 07, 2009 by Eric Dumazet Committed by David S. Miller May 07, 2009

tcp: tcp_prequeue() can use keyed wakeups



We can avoid waking up tasks not interested in receive notifications,
using wake_up_interruptible_poll() instead of wake_up_interruptible()

Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent f5f8d86b

include/net/tcp.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -908,7 +908,8 @@ 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(sk->sk_sleep);
		wake_up_interruptible_poll(sk->sk_sleep,
		POLLIN \| POLLRDNORM \| POLLRDBAND);
		if (!inet_csk_ack_scheduled(sk))
		inet_csk_reset_xmit_timer(sk, ICSK_TIME_DACK,
		(3 * TCP_RTO_MIN) / 4,