Re: wsevent MP-safe

[Matthias Drochner <M.Drochner%fz-juelich.de@localhost>]

rmind%netbsd.org@localhost said:
> > have this queue mmap()able,
> > or at least accessible to kernel video drivers
> Why do you think that patch inhibits it

Formerly, the structure was public. (Although I agree that it
was not terribly useful to be synchronized with a userspace
consumer as-is, but it was something to start with.) Now it
is private.
Just want to point out that I'm absolutely not certain whether
X servers etc support that kind of event interface now or in
future. It used to be the case a while ago, at least on DEC
(my mail server):

zelof1> file /dev/ws*
/dev/ws0: character special (33/1) VS_SLU #0 PMAGB-BA terminal #1
zelof1> uname -a
OSF1 zelof1 V5.0 910 alpha

and I believe also on Sun hardware of that time.
And seeing the jerky mouse movements on my dual-core 2GHz
laptop I'm tempted to agree. (If this can't be solved
by NetBSD scheduler measures, which is something you can
certainly give a better answer for.)

best regards
Matthias



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