[PATCH 5/14] [TIPC] Optimize wakeup logic when socket has no waiting processes
From: Per Liden <hidden>
Date: 2006-10-13 11:38:00
Subsystem:
networking [general], the rest, tipc network layer · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Jon Maloy
From: Allan Stephens <redacted> This patch adds a simple test so TIPC doesn't try waking up processes waiting on a socket if there are none waiting. Signed-off-by: Allan Stephens <redacted> Signed-off-by: Per Liden <redacted> --- net/tipc/socket.c | 6 ++++-- 1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/net/tipc/socket.c b/net/tipc/socket.c
index ed900fe..2a6a5a6 100644
--- a/net/tipc/socket.c
+++ b/net/tipc/socket.c@@ -1208,7 +1208,8 @@ static u32 dispatch(struct tipc_port *tp atomic_inc(&tipc_queue_size); skb_queue_tail(&sock->sk->sk_receive_queue, buf); - wake_up_interruptible(sock->sk->sk_sleep); + if (waitqueue_active(sock->sk->sk_sleep)) + wake_up_interruptible(sock->sk->sk_sleep); return TIPC_OK; }
@@ -1223,7 +1224,8 @@ static void wakeupdispatch(struct tipc_p { struct tipc_sock *tsock = (struct tipc_sock *)tport->usr_handle; - wake_up_interruptible(tsock->sk.sk_sleep); + if (waitqueue_active(tsock->sk.sk_sleep)) + wake_up_interruptible(tsock->sk.sk_sleep); } /**
--
1.4.1