Re: [PATCH v2] drm: make drm_file use keyed wakeups

2020-04-30 Thread Daniel Vetter
On Wed, Apr 29, 2020 at 11:19:07AM +, k...@kl.wtf wrote: > April 28, 2020 5:14 PM, "Daniel Vetter" wrote: > > > On Fri, Apr 24, 2020 at 06:26:15PM +0200, Kenny Levinsen wrote: > > > >> Some processes, such as systemd, are only polling for EPOLLERR|EPOLLHUP. > >> As drm_file uses unkeyed wake

Re: [PATCH v2] drm: make drm_file use keyed wakeups

2020-04-30 Thread kl
April 28, 2020 5:14 PM, "Daniel Vetter" wrote: > On Fri, Apr 24, 2020 at 06:26:15PM +0200, Kenny Levinsen wrote: > >> Some processes, such as systemd, are only polling for EPOLLERR|EPOLLHUP. >> As drm_file uses unkeyed wakeups, such a poll can receive many spurious >> wakeups from uninteresting

Re: [PATCH v2] drm: make drm_file use keyed wakeups

2020-04-28 Thread Daniel Vetter
On Fri, Apr 24, 2020 at 06:26:15PM +0200, Kenny Levinsen wrote: > Some processes, such as systemd, are only polling for EPOLLERR|EPOLLHUP. > As drm_file uses unkeyed wakeups, such a poll can receive many spurious > wakeups from uninteresting events if, for example, the file description > is subscri

[PATCH v2] drm: make drm_file use keyed wakeups

2020-04-24 Thread Kenny Levinsen
Some processes, such as systemd, are only polling for EPOLLERR|EPOLLHUP. As drm_file uses unkeyed wakeups, such a poll can receive many spurious wakeups from uninteresting events if, for example, the file description is subscribed to vblank events. This is the case with systemd, as it polls a file