sched, net: socket wakeups are sync

'sync' wakeups are a hint towards the scheduler that (certain)
networking related wakeups likely create coupling between tasks.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/net/core/sock.c b/net/core/sock.c
index 09cb3a7..2654c14 100644 (file)
--- a/net/core/sock.c
+++ b/net/core/sock.c
@@ -1621,7 +1621,7 @@ static void sock_def_readable(struct sock *sk, int len)
 {
        read_lock(&sk->sk_callback_lock);
        if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
-               wake_up_interruptible(sk->sk_sleep);
+               wake_up_interruptible_sync(sk->sk_sleep);
        sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
        read_unlock(&sk->sk_callback_lock);
 }
@@ -1635,7 +1635,7 @@ static void sock_def_write_space(struct sock *sk)
         */
        if ((atomic_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf) {
                if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
-                       wake_up_interruptible(sk->sk_sleep);
+                       wake_up_interruptible_sync(sk->sk_sleep);
 
                /* Should agree with poll, otherwise some programs break */
                if (sock_writeable(sk))