Messages in this thread | | | From | Andi Kleen <> | Subject | Re: [RFC 0/8] Reduce MAX_NR_ZONES and remove useless zones. | Date | Tue, 4 Jul 2006 17:23:46 +0200 |
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> I guess then we should drop ZONE_DMA (its a misnoner anyways since it > seems to indicate that DMA is only possible in this zone). Instead use > > ZONE_ISA_DMA -> ISA DMA Area (16 MB boundary) > ZONE_32BIT_DMA -> 32bit DMA area (well 900 MB on x86_64 but somewhere in that area)
It's 4GB on x86-64.
The 900MB refered to the boundary between NORMAL and HIGHMEM on i386.
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