Re: DMA to user space

From: Alan Cox (
Date: Thu Mar 16 2000 - 21:06:02 EST

> "impossible" values some of the time) by using a driver-owned buffer which
> the user job mmaps into a window. But I consider that a kludge. I'm a big
> fan of doing what I actually *mean* whenever possible, rather than living

Its the right way for 2.2

> a single 32-bit address space so kernel mode gets the low end and user space
> gets the rest? Or would I have to fiddle with the user's page table directly?

For 2.3.x take a look at the raw I/O stuff Stephen Tweedie added,
the core stuff is there

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