Messages in this thread | | | From | David Mosberger <> | Date | Tue, 5 Mar 2002 08:44:18 -0800 | Subject | Re: Does kmalloc always return address below 4GB? |
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>>>>> On Tue, 05 Mar 2002 07:47:22 -0800 (PST), "David S. Miller" <davem@redhat.com> said:
DaveM> I know pci_map_single (and _sg) will use bounce buffers on DaveM> platforms without an IOMMU,
DaveM> 64-bit platforms without IOMMU use HIGHMEM.
Not true for ia64 linux.
DaveM> It could for example be solved with a GFP_32BIT flag or DaveM> something (on IA64 I know GFP_DMA is used in DaveM> pci_alloc_consistent() to get memory below 4GB but that can't DaveM> be used on all platforms).
DaveM> IA64 was broken, it now uses HIGHMEM.
No it doesn't. Perhaps you meant to say that the Red Hat version of the ia64 linux kernel uses highmem?
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