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Commit 67426b75 authored by Eric Dumazet's avatar Eric Dumazet Committed by David S. Miller
Browse files

af_unix: use keyed wakeups 



Instead of wakeup all sleepers, use wake_up_interruptible_sync_poll() to
wakeup only ones interested into writing the socket.

This patch is a specialization of commit 37e5540b (epoll keyed
wakeups: make sockets use keyed wakeups).

On a test program provided by Alan Crequy :

Before:
real    0m3.101s
user    0m0.000s
sys     0m6.104s

After:

real	0m0.211s
user	0m0.000s
sys	0m0.208s

Reported-by: default avatarAlban Crequy <alban.crequy@collabora.co.uk>
Signed-off-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Cc: Davide Libenzi <davidel@xmailserver.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent fc766e4c

net/unix/af_unix.c

+4 −2
Original line number Diff line number Diff line
@@ -316,7 +316,8 @@ static void unix_write_space(struct sock *sk) 
	if (unix_writable(sk)) {

		wq = rcu_dereference(sk->sk_wq);

		if (wq_has_sleeper(wq))

			wake_up_interruptible_sync(&wq->wait);

			wake_up_interruptible_sync_poll(&wq->wait,

				POLLOUT | POLLWRNORM | POLLWRBAND);

		sk_wake_async(sk, SOCK_WAKE_SPACE, POLL_OUT);

	}

	rcu_read_unlock();
@@ -1710,7 +1711,8 @@ static int unix_dgram_recvmsg(struct kiocb *iocb, struct socket *sock, 
		goto out_unlock;

	}



	wake_up_interruptible_sync(&u->peer_wait);

	wake_up_interruptible_sync_poll(&u->peer_wait,

					POLLOUT | POLLWRNORM | POLLWRBAND);



	if (msg->msg_name)

		unix_copy_addr(msg, skb->sk);