Reserving low memory space is fairly easy. You'd probably want a different
function to kmalloc managing it (kmalloc is called an awful lot), and
your dma memory allocator could call kmalloc itself as a last resort.
> (of course the other solution would be modifying the MM to do some more
> aggressive try_to_get_dmable_memory type thingies)
That may work. Someone was playing with it
> And this raises a question about Linux's MM: How hard is it for the kernel
> to relocate things in physical memory?
Its definitely not 2.2 stuff, its a generally hard problem.
Alan
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