sched: affine sync wakeups

make sync wakeups affine for cache-cold tasks: if a cache-cold task
is woken up by a sync wakeup then use the opportunity to migrate it
straight away. (the two tasks are 'related' because they communicate)

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

1 files changed, 2 insertions, 2 deletions

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 2b57eaf66abc..6996cba5aa96 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -334,7 +334,7 @@ static void unix_write_space(struct sock *sk)
         read_lock(&sk->sk_callback_lock);
         if (unix_writable(sk)) {
                 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, 2, POLL_OUT);
         }
         read_unlock(&sk->sk_callback_lock);
@@ -1639,7 +1639,7 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock,
         if (!skb)
                 goto out_unlock;
 
-        wake_up_interruptible(&u->peer_wait);
+        wake_up_interruptible_sync(&u->peer_wait);
 
         if (msg->msg_name)
                 unix_copy_addr(msg, skb->sk);