Re: PCI memory allocation bug with CONFIG_HIGHMEM

[Mika Penttilä]

Andi Kleen wrote:

> > If you ahve a proper e820 map, then it should work correctly, with 
> > anything that is RAM being marked as such (or being marked as "reserved").
> >    
>
> Every e820 map i've seen did not have the AGP aperture marked reserved.
Why should it? It's not ram, and the aperture is marked as reserved 
while doing PCI resource assignment/reservation.

> It is just an undescribed hole.  In fact when you mark the aperture in the
> e820 map the Linux AGP driver stops working, it relies on it being
> in an undescribed hole.
>
>  


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