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SubjectRe: [Linux-ia64] patch to no longer use ia64's software mmu
>>>>> On Tue, 4 Dec 2001 17:59:28 +0000 (GMT), Alan Cox <> said:

Alan> ISA DMA. While there is no ISA DMA on ia64 (thankfully) many
Alan> PCI cards have 26-31 bit limits.
>> We could do this if we there was a GFP_4GB zone. Now that 2.5
>> is open for business, it won't be long, right?

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?

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