From: Frank C. E. <fe...@ai...> - 2002-05-25 23:11:03
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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 |