netdev - [PATCH 4/5] ipvs: Put backup thread on mcast socket wait queue

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Message-Id: <1214760766-1526-5-git-send-email-sven.wegener@stealer.net>
Date:	Sun, 29 Jun 2008 19:32:45 +0200
From:	Sven Wegener <sven.wegener@...aler.net>
To:	wensong@...ux-vs.org, horms@...ge.net.au, ja@....bg
Cc:	netdev@...r.kernel.org
Subject: [PATCH 4/5] ipvs: Put backup thread on mcast socket wait queue

Instead of doing an endless loop with sleeping for one second, we now put the
backup thread onto the mcast socket wait queue and it gets woken up as soon as
we have data to process.

Signed-off-by: Sven Wegener <sven.wegener@...aler.net>
---
 net/ipv4/ipvs/ip_vs_sync.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/net/ipv4/ipvs/ip_vs_sync.c b/net/ipv4/ipvs/ip_vs_sync.c
index 26d58a6..fa49c24 100644
--- a/net/ipv4/ipvs/ip_vs_sync.c
+++ b/net/ipv4/ipvs/ip_vs_sync.c
@@ -31,6 +31,7 @@
 #include <linux/udp.h>
 #include <linux/err.h>
 #include <linux/kthread.h>
+#include <linux/wait.h>
 
 #include <net/ip.h>
 #include <net/sock.h>
@@ -774,6 +775,10 @@ static int sync_thread_backup(void *data)
 		   ip_vs_backup_mcast_ifn, ip_vs_backup_syncid);
 
 	while (!kthread_should_stop()) {
+		wait_event_interruptible(*tinfo->sock->sk->sk_sleep,
+			 !skb_queue_empty(&tinfo->sock->sk->sk_receive_queue)
+			 || kthread_should_stop());
+
 		/* do we have data now? */
 		while (!skb_queue_empty(&(tinfo->sock->sk->sk_receive_queue))) {
 			len = ip_vs_receive(tinfo->sock, tinfo->buf,
@@ -789,8 +794,6 @@ static int sync_thread_backup(void *data)
 			ip_vs_process_message(tinfo->buf, len);
 			local_bh_enable();
 		}
-
-		msleep_interruptible(1000);
 	}
 
 	/* release the sending multicast socket */
-- 
1.5.6.1

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