From 7aedec2ad5314b173e78ca3f4edb4ceaa02248bb Mon Sep 17 00:00:00 2001
From: Eric Dumazet <dada1@cosmosbay.com>
Date: Thu, 7 May 2009 07:20:39 +0000
Subject: [PATCH] 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>
---
include/net/tcp.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/include/net/tcp.h b/include/net/tcp.h
index ac37228b70013..87d210bb12a47 100644
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -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,
--
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