On Mon, Jan 31, 2000 at 01:56:58PM -0600, Jeff Garzik wrote:
> On Mon, 31 Jan 2000, Ralf Baechle wrote:
> > People have been using GFP_DMA / MAX_DMA_ADDRESS for other machines where
> > not the entire memory is usable for DMA for hardware or software reasons.
>
> FWIW, I think MAX_DMA_ADDRESS should go away, in these times with zones
> and NUMA. (not GPF_DMA, just MAX_DMA_ADDRESS)
MAX_DMA_ADDRESS was probably born to stay. There are places where you need to
deciede if an address can be directly dma'ed to. MAX_DMA_ADDRESS is by far
the simplest way to do this for ISA.
Good NUMA support is somewhat more hairy. One of the things we're working
on. If you're interested follow the work via anonymous cvs on oss.sgi.com.
Ralf
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