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

[David Mosberger <davidm@hpl.hp.com>]

>>>>> On Tue, 4 Dec 2001 18:19:55 +0000 (GMT), Alan Cox <alan@lxorguk.ukuu.org.uk> said:

  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?

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

Oh, OK, we're in agreement then.  When I looked at the zone stuff the
last time, I didn't think you could have an internal 4GB zone without
abusing an existing zone making some changes to the header files in
linux/*.h, but perhaps I missed something.

	--david