On Saturday 25 May 2002 06:37 pm, David Willmore wrote:

> I'm new to the devel list--I got on to help test the new Mach64
> code.  I don't have much time these days to contribute coding,
> but I can test. ;)

Everything is welcome- and your testing is appreciated.  (Nice domain name, 
BTW.  I like it!)

> Something struck me while I was watching this thread go on.  Since
> Linus is on the group, why not ask him how he thinks this could
> work?

You know, it never dawned on me to do that.  I've been going off of what 
other people have said on the subject- fairly reliable sources (the O'Reilly 
books on the Kernel operation and device driver development, to be exact...) 
but not the people working on it on a regular basis.  Thanks for mentioning 
it.

Linus, if you're still listening in, can you spare us a moment to tell us 
what consequences quickly mapping and unmapping memory reigons into userspace 
has on the system?  We've got a couple of the DRM modules that do that to 
ensure the driver is secure.  I'm thinking it's a source of some performance 
degredation in the drivers and it may not be good on the memory subsytem.


-- 
Frank Earl

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