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Date: Sat, 13 Aug 2016 00:26:21 -0700
From: Matthew Macy <mmacy@nextbsd.org>
To: "Lundberg, Johannes" <johannes@brilliantservice.co.jp>
Cc: "FreeBSD Current" <freebsd-current@freebsd.org>
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Subject: Re: Wayland work status
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 >=20
 > =E2=80=8BWayland relies on kqueue which is not implemented in drm's 3.8 =
or 4.6
 > branches. I'm working on this now for drm-next-4.6 and it is almost
 > complete.
 > I will probably implement it also in the 3.8 =E2=80=8Bbranch to be able =
to run
 > Wayland on both to compare and find bugs in linuxkpi more easily. Will
 > share patch for 3.8 branch when done.
 >=20

drm-next has working kevent support following shortly after the drm-v4.7 ta=
g. Your kqfilter implementation would be ideal for 3.8 but is not suitable =
for drm-next as it substantially modifies vendor code. I think your impleme=
ntation does in fact work or is very close. Your apparent problem stemmed f=
rom an index overwrite in your modified kmscube.c test case.

A working kmscube.c can be found at:

https://github.com/FreeBSDDesktop/kmscube

With no arguments it will use select. If you pass -k it will use kevent.
-M