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SubjectRe: 2.6.10-rc2-mm4
Arjan van de Ven <arjan@infradead.org> wrote:
>
> > > > - x86_64 supports a fourth VM zone: ZONE_DMA32. This may affect memory
> > > > reclaim, but shouldn't.
> > >
> > >
> > > what is the purpose of such a zone ??
> >
> > For pages which have a physical address <4G. I assume this was motivated
> > by the lack of an IOMMU on ia32e?
>
> but there's the swiommu for those... so that can't be it
> realistically....

"This helps mainly graphic drivers who really need a lot of memory below
the 4GB area. Previous they could only use IOMMU+16MB GFP_DMA, which was
not enough memory."

> Is there code using the zone GFP mask yet ??

Nope.
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