Re: RFC: Very large allocations for 2.4.x

[Richard Henderson]

On Tue, Jun 27, 2000 at 01:10:09PM -0400, Jeff Garzik wrote:
> Yes, I am aware that most applications -shouldn't- use this, but I am
> hoping to convince the readers here that there is still a need to
> support such allocations.  To this end, I propose a simple but flexible
> system.  Comments requested.

Any machine with an IOMMU needn't reserve contiguous physical memory,
since the appearence of such can be fabricated.

Having a nice functional interface to whatever you come up with to
support x86 machines makes it that much easier to support properly
on sensible hardware.

I imagine that such an interface would look a lot like the 
pci_map_single interface that we already have.  Namely, the
need for pci_dma_sync_single and such.

r~