Re: [RFC 0/8] Reduce MAX_NR_ZONES and remove useless zones.

[Christoph Hellwig]

On Mon, Jul 03, 2006 at 04:26:57PM -0700, Christoph Lameter wrote:
> > Which btw is utterly wrong.  It should have a 4GB ZONE_DMA32 and everything
> > else in ZONE_NORMAL.
> 
> So we want to change the definition of ZONE_DMA to refer to the first 16MB 
> only? ZONE_DMA32 is always a 4GB border?

The definition of ZONE_DMA32 is to be te 32bit border.  I think we should
implement it wherever possible but at least on all architectures that
maybe have non-iommu implementations.  ZONE_DMA should be an arch-specific
low memory zone.

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