> I works about the same way with the 2.6.9-rc3 kernel I'm running.

Ditto here, but with gentoo-sources (2.6.10), and the official nvidia
drivers. In fact I get a much bigger performance hit with yes+glxgears
(glxgears drops to 2fps)... But yes, the point is that something is
going mad here... not good :/

I'm still trying to conceptialise the mechanism. Am I right in
thinking that the kernel driver will initiate DMA between the card and
user process for transporting command data, because pulling the memory
using normal methods will be painfull?

I suppose one advantage of this method would be that a process
wouldn't need any special privelages because it isn't initating the
DMA transfers.

In fact, this whole idea sounds like SGI's graphics pipe (which I like) :)

-Lucas
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