pipe: Remove sync on wake_ups (3c0edea9) · Commits · 戴 / test

fs/pipe.c

+4 −4

Original line number	Diff line number	Diff line
		@@ -332,7 +332,7 @@ pipe_read(struct kiocb iocb, struct iov_iter to)
		do_wakeup = 1;
		wake = head - (tail - 1) == pipe->max_usage / 2;
		if (wake)
		wake_up_interruptible_sync_poll_locked(
		wake_up_locked_poll(
		&pipe->wait, EPOLLOUT \| EPOLLWRNORM);
		spin_unlock_irq(&pipe->wait.lock);
		if (wake)
		@@ -371,7 +371,7 @@ pipe_read(struct kiocb iocb, struct iov_iter to)

		/* Signal writers asynchronously that there is more room. */
		if (do_wakeup) {
		wake_up_interruptible_sync_poll(&pipe->wait, EPOLLOUT \| EPOLLWRNORM);
		wake_up_interruptible_poll(&pipe->wait, EPOLLOUT \| EPOLLWRNORM);
		kill_fasync(&pipe->fasync_writers, SIGIO, POLL_OUT);
		}
		if (ret > 0)
		@@ -477,7 +477,7 @@ pipe_write(struct kiocb iocb, struct iov_iter from)
		* syscall merging.
		* FIXME! Is this really true?
		*/
		wake_up_interruptible_sync_poll_locked(
		wake_up_locked_poll(
		&pipe->wait, EPOLLIN \| EPOLLRDNORM);

		spin_unlock_irq(&pipe->wait.lock);
		@@ -531,7 +531,7 @@ pipe_write(struct kiocb iocb, struct iov_iter from)
		out:
		__pipe_unlock(pipe);
		if (do_wakeup) {
		wake_up_interruptible_sync_poll(&pipe->wait, EPOLLIN \| EPOLLRDNORM);
		wake_up_interruptible_poll(&pipe->wait, EPOLLIN \| EPOLLRDNORM);
		kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN);
		}
		if (ret > 0 && sb_start_write_trylock(file_inode(filp)->i_sb)) {