From: Eric Dumazet Date: Fri, 29 Oct 2010 20:44:44 +0000 (+0000) Subject: af_unix: use keyed wakeups X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=67426b756c4d52c511c4b22b269accea171692a8;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git 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 Signed-off-by: Eric Dumazet Cc: Davide Libenzi Signed-off-by: David S. Miller --- 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);