epoll keyed wakeups: make sockets use keyed wakeups
Add support for event-aware wakeups to the sockets code. Events are delivered to the wakeup target, so that epoll can avoid spurious wakeups for non-interesting events. Signed-off-by: Davide Libenzi <davidel@xmailserver.org> Acked-by: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Miller <davem@davemloft.net> Cc: William Lee Irwin III <wli@movementarian.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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c0da377536
Коммит
37e5540b3c
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@ -1677,7 +1677,7 @@ static void sock_def_error_report(struct sock *sk)
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{
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read_lock(&sk->sk_callback_lock);
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if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
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wake_up_interruptible(sk->sk_sleep);
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wake_up_interruptible_poll(sk->sk_sleep, POLLERR);
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sk_wake_async(sk, SOCK_WAKE_IO, POLL_ERR);
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read_unlock(&sk->sk_callback_lock);
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}
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@ -1686,7 +1686,8 @@ static void sock_def_readable(struct sock *sk, int len)
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{
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read_lock(&sk->sk_callback_lock);
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if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
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wake_up_interruptible_sync(sk->sk_sleep);
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wake_up_interruptible_sync_poll(sk->sk_sleep, POLLIN |
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POLLRDNORM | POLLRDBAND);
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sk_wake_async(sk, SOCK_WAKE_WAITD, POLL_IN);
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read_unlock(&sk->sk_callback_lock);
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}
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@ -1700,7 +1701,8 @@ static void sock_def_write_space(struct sock *sk)
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*/
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if ((atomic_read(&sk->sk_wmem_alloc) << 1) <= sk->sk_sndbuf) {
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if (sk->sk_sleep && waitqueue_active(sk->sk_sleep))
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wake_up_interruptible_sync(sk->sk_sleep);
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wake_up_interruptible_sync_poll(sk->sk_sleep, POLLOUT |
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POLLWRNORM | POLLWRBAND);
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/* Should agree with poll, otherwise some programs break */
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if (sock_writeable(sk))
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