diff options
| author | Kenny Levinsen <kl@kl.wtf> | 2020-04-18 21:26:50 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2020-04-18 21:57:07 -0700 |
| commit | 81b4d1d22ca0d0162360d3536b0eb3f6d5bfcf88 (patch) | |
| tree | 4b6fee58dc8fd0cd51e8d569579062c4bad3a222 /drivers/input | |
| parent | ec4ba6c35b1bd748de50044e36040136f378b9b6 (diff) | |
| download | linux-81b4d1d22ca0d0162360d3536b0eb3f6d5bfcf88.tar.bz2 | |
Input: evdev - use keyed wakeups
Some processes, such as systemd, are only polling for EPOLLERR|EPOLLHUP.
As evdev uses unkeyed wakeups, such a poll receives many spurious
wakeups from uninteresting events.
Use keyed wakeups to allow the wakeup target to more efficiently discard
these uninteresting events.
Signed-off-by: Kenny Levinsen <kl@kl.wtf>
Link: https://lore.kernel.org/r/20200410233557.3892-1-kl@kl.wtf
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'drivers/input')
| -rw-r--r-- | drivers/input/evdev.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/input/evdev.c b/drivers/input/evdev.c index d7dd6fcf2db0..f54d3d31f61d 100644 --- a/drivers/input/evdev.c +++ b/drivers/input/evdev.c @@ -282,7 +282,8 @@ static void evdev_pass_values(struct evdev_client *client, spin_unlock(&client->buffer_lock); if (wakeup) - wake_up_interruptible(&evdev->wait); + wake_up_interruptible_poll(&evdev->wait, + EPOLLIN | EPOLLOUT | EPOLLRDNORM | EPOLLWRNORM); } /* @@ -443,7 +444,7 @@ static void evdev_hangup(struct evdev *evdev) kill_fasync(&client->fasync, SIGIO, POLL_HUP); spin_unlock(&evdev->client_lock); - wake_up_interruptible(&evdev->wait); + wake_up_interruptible_poll(&evdev->wait, EPOLLHUP | EPOLLERR); } static int evdev_release(struct inode *inode, struct file *file) @@ -958,7 +959,7 @@ static int evdev_revoke(struct evdev *evdev, struct evdev_client *client, client->revoked = true; evdev_ungrab(evdev, client); input_flush_device(&evdev->handle, file); - wake_up_interruptible(&evdev->wait); + wake_up_interruptible_poll(&evdev->wait, EPOLLHUP | EPOLLERR); return 0; } |