Re: 2.6.20-rc7 mtrr handling

H. Peter Anvin
2007-02-01T06:49:55Z

Sebastian Kemper wrote:
> On Thursday 01 February 2007 07:13, you wrote:
>> Sebastian Kemper wrote:
>>> But now /proc/mtrr shows 256MB of video ram, same as lspci, whereas
>>> the real amount of video ram (as properly detected by X) is only
>>> 128MB.
>> The size of the aperture doesn't have to match the actual amount of
>> memory. For many cards it doesn't.
>>
>> -hpa
>
> Hello Peter,
>
> sorry, I don't understand. Are you talking about the AGP Aperture size
> that I can set in my BIOS or about the actual video ram on the graphics
> card. Because that's the one that the mtrr sets to its double size.

Neither. I'm talking about the window in the address space, as shown in
/proc/pci.

-hpa