Re: mtrr madness

[Robert Hancock]

Lukas Hejtmanek wrote:
> Hello,
>
> it seems that all linux kernels contain a bug with mtrr:
>
>  cat /proc/mtrr 
> reg00: base=0x00000000 (   0MB), size=198656MB: write-back, count=1
> reg01: base=0x80000000 (2048MB), size=197120MB: write-back, count=1
> reg02: base=0x9fc00000 (2556MB), size=196612MB: uncachable, count=1
> reg03: base=0x100000000 (4096MB), size=200704MB: write-back, count=1
> reg04: base=0x200000000 (8192MB), size=204800MB: write-back, count=1
>
> (watch the size)
>
> it is definitely  present in the kernels 2.6.16, 2.6.24, 2.6.25, 2.6.26.
>
> 198656 is 0x3080000000, the correct value would be 0x80000000, similarly
> 197120 is 0x3020000000, the correct would be 0x20000000. 

Those are set up by the BIOS, so it would be what's at fault. I think we 
may be adding something to fix this up though?
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