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
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/