From: Jakma, Paul (Paul.Jakma at domain compaq.com)
Date: Thu 23 Sep 1999 - 19:04:09 IST
> Do you think that NT has all the rendering stuff in ring0 too ? No it
> doesn't - it has a little more than Linux does these days.
it doesn't? i thought one of the big differences between nt3.51 and nt4 was
that graphics was moved into kernel space? Also causing massive unstability.
But i always thought the improvement in NT's stability was down to time and
more thoroughly debugged drivers.. did it change again?
> There isn't much
> there, but what there is, apparently speeds stuff up a lot. Of course,
> Linux doesn't have multiple rings - it's in or out
userspace is ring3 on x86 isn't it? (iirc). are there any OS's on x86 that
use the inbetween rings? (linux is either full-blown kernel privileges or
complete userspace. so is NT i thought.)
> Nice piccie of what it's all supposed to do..
>
http://www.precisioninsight.com/dr/mini_poster.jpg
so i guess it's arbitration only, ie make sure that DRI clients and X don't
blast the hardware at the same time.
regards,
paul.
(how OT can this thread go? let's try set a record!)
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