> I assume the original DRI you are talking about is what IRIX uses. This is
> very different in design from DRI in linux. Linux DRI is designed around
Not really
> the idea of userland locking since low end cards don't support context
> switching. The orginal DRI has schedular hooks to handle the effects of
> context switching on the video sub system. Their are other differences as
The original DRI also does userland locking and management in part because
it has to handle running out of contexts (easy to do at the low end). The
scheduler hooks are solely SMP damping since you can have more CPU's than
contexts and get into an SMP thrashing situation. There are better ways
to handle that IMHO than hacking the scheduler
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