diff options
| author | Kenny Levinsen <kl@kl.wtf> | 2020-04-24 16:51:03 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2020-04-28 17:10:56 +0200 |
| commit | 87189b78959c10c454477cce5cb9836c2ee5c730 (patch) | |
| tree | 4ff14629ecd4cccfd14414e254667a782c6f6497 /drivers/gpu/drm/drm_file.c | |
| parent | d83949492427e1c9584c8db91c5d2a26747e7e73 (diff) | |
drm: make drm_file use keyed wakeups
Some processes, such as systemd, are only polling for EPOLLERR|EPOLLHUP.
As drm_file 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>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20200424145103.3048-1-kl@kl.wtf
Diffstat (limited to 'drivers/gpu/drm/drm_file.c')
| -rw-r--r-- | drivers/gpu/drm/drm_file.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/gpu/drm/drm_file.c b/drivers/gpu/drm/drm_file.c index eb009d3ab48f..7194e67e78bd 100644 --- a/drivers/gpu/drm/drm_file.c +++ b/drivers/gpu/drm/drm_file.c @@ -613,7 +613,8 @@ put_back_event: file_priv->event_space -= length; list_add(&e->link, &file_priv->event_list); spin_unlock_irq(&dev->event_lock); - wake_up_interruptible(&file_priv->event_wait); + wake_up_interruptible_poll(&file_priv->event_wait, + EPOLLIN | EPOLLRDNORM); break; } @@ -809,7 +810,8 @@ void drm_send_event_locked(struct drm_device *dev, struct drm_pending_event *e) list_del(&e->pending_link); list_add_tail(&e->link, &e->file_priv->event_list); - wake_up_interruptible(&e->file_priv->event_wait); + wake_up_interruptible_poll(&e->file_priv->event_wait, + EPOLLIN | EPOLLRDNORM); } EXPORT_SYMBOL(drm_send_event_locked); |