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authorEric Dumazet <eric.dumazet@gmail.com>2010-10-29 20:44:44 +0000
committerDavid S. Miller <davem@davemloft.net>2010-11-08 13:50:08 -0800
commit67426b756c4d52c511c4b22b269accea171692a8 (patch)
tree60c640a4b103946d706671ccc2d12fc0d23ed544 /net/unix
parentfc766e4c4965915ab52a1d1fa3c7a7b3e7bc07f0 (diff)
downloadlwn-67426b756c4d52c511c4b22b269accea171692a8.tar.gz
lwn-67426b756c4d52c511c4b22b269accea171692a8.zip
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 37e5540b3c9d (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: Alban Crequy <alban.crequy@collabora.co.uk> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Cc: Davide Libenzi <davidel@xmailserver.org> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/unix')
-rw-r--r--net/unix/af_unix.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 3c95304a0817..f33c5958dbb2 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -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);