Re: x86-64: Why minimum 64MB aperture?

[Andi Kleen]

On Friday 23 September 2005 10:07, you wrote:
> I get this when I boot:
>
> Checking aperture...
> CPU 0: aperture @ 23a8000000 size 32 MB
> Aperture from northbridge cpu 0 too small (32 MB)
>
>
> arch/x86_64/aperture.c says this when aperture is < 64MB.
>
> I have no way of changing this in my BIOS.  The systems shares video memory
> with RAM.  All I can change is the amount of RAM allocated for video (32,
> 64 or 128 MB, currently set to 64.)

32MB is too small for IOMMU use. Linux will fix it up for you.

-Andi
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