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| author | Davide Libenzi <davidel@xmailserver.org> | 2011-01-12 17:00:25 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-13 08:03:15 -0800 |
| commit | e462c448fdc89252d631b26ff0ed4f7ad6fe8ed2 (patch) | |
| tree | f65b101f714ea996a9ca7c366f3cf8084fbf8cad /fs/pipe.c | |
| parent | 5f829e405ec4e96f711165a4a7b55c271d4363e2 (diff) | |
| download | lwn-e462c448fdc89252d631b26ff0ed4f7ad6fe8ed2.tar.gz lwn-e462c448fdc89252d631b26ff0ed4f7ad6fe8ed2.zip | |
pipe: use event aware wakeups
Send the events the wakeup refers to, so that epoll, and even the new poll
code in fs/select.c can avoid wakeups if the events do not match the
requested set.
Signed-off-by: Davide Libenzi <davidel@xmailserver.org>
Acked-by: David S. Miller <davem@davemloft.net>
Acked-by: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/pipe.c')
| -rw-r--r-- | fs/pipe.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/pipe.c b/fs/pipe.c index 68f1f8e4e23b..04151e2aee96 100644 --- a/fs/pipe.c +++ b/fs/pipe.c @@ -441,7 +441,7 @@ redo: break; } if (do_wakeup) { - wake_up_interruptible_sync(&pipe->wait); + wake_up_interruptible_sync_poll(&pipe->wait, POLLOUT); kill_fasync(&pipe->fasync_writers, SIGIO, POLL_OUT); } pipe_wait(pipe); @@ -450,7 +450,7 @@ redo: /* Signal writers asynchronously that there is more room. */ if (do_wakeup) { - wake_up_interruptible_sync(&pipe->wait); + wake_up_interruptible_sync_poll(&pipe->wait, POLLOUT); kill_fasync(&pipe->fasync_writers, SIGIO, POLL_OUT); } if (ret > 0) @@ -612,7 +612,7 @@ redo2: break; } if (do_wakeup) { - wake_up_interruptible_sync(&pipe->wait); + wake_up_interruptible_sync_poll(&pipe->wait, POLLIN); kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN); do_wakeup = 0; } @@ -623,7 +623,7 @@ redo2: out: mutex_unlock(&inode->i_mutex); if (do_wakeup) { - wake_up_interruptible_sync(&pipe->wait); + wake_up_interruptible_sync_poll(&pipe->wait, POLLIN); kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN); } if (ret > 0) @@ -715,7 +715,7 @@ pipe_release(struct inode *inode, int decr, int decw) if (!pipe->readers && !pipe->writers) { free_pipe_info(inode); } else { - wake_up_interruptible_sync(&pipe->wait); + wake_up_interruptible_sync_poll(&pipe->wait, POLLIN | POLLOUT); kill_fasync(&pipe->fasync_readers, SIGIO, POLL_IN); kill_fasync(&pipe->fasync_writers, SIGIO, POLL_OUT); } |