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Commit 6f3d0929 authored by Ingo Molnar's avatar Ingo Molnar
Browse files

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: default avatarIngo Molnar <mingo@elte.hu>
parent f4827386

net/core/sock.c

+2 −2
Original line number Diff line number Diff line
@@ -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))