Re: [Linux-ia64] patch to no longer use ia64's software mmu

[Alan Cox]

>   Alan> I don't see the need: GFP_DMA is the ISA DMA zone. pci_* API
>   Alan> is used by everyone else [for 2.5].
> 
> Without a 4GB zone, you may end up creating bounce buffers needlessly
> for 32-bit capable DMA devices, no?

Yes - but it becomes an implementation detail. Drivers don't go around
asking for kmalloc in 4Gb zone anymore they ask for PCI memory that a 32bit
pci address can hit. I'm sure a 4Gb zone is what will be there internally
but you don't need GFP_4GBZONE as a visible driver detail.

Alan