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SubjectRe: PCI memory allocation bug with CONFIG_HIGHMEM


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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