[gentoo-user] [OT?] MTRR and PAT

[pk <peterk2@coolmail.se>]

Hi,

(Sorry if this is off-topic but I really don't know where to turn to...)

Anyone with experience/knowledge about MTRR/PAT and who can tell me 
where to find information about these things so that I might see if 
there's a problem or not? I've tried google but in this case they're not 
my friend... :-(

The MTRR of one of my machines look like this:
reg00: base=0x00000000 (   0MB), size=2048MB: write-back, count=1
reg01: base=0x80000000 (2048MB), size=1024MB: write-back, count=1
reg02: base=0xbff00000 (3071MB), size=   1MB: uncachable, count=1
reg03: base=0x100000000 (4096MB), size=1024MB: write-back, count=1

The gfx card is a (pcie) Radeon HD3850 and the base address for the 
framebuffer is 0xd0000000 (64-bit, prefetchable) [size=256M]. It also 
has (what I believe is) registers at 0xf1000000 (64-bit, 
non-prefetchable) [size=64K].

One of my other machines get's warnings about

All the relevant info that comes up when I use google relates to AGP but 
I use PCIE, so is it still relevant? Also, are there other devices 
besides the graphics card that would benefit from having a correct MTRR 
setting?

TIA,

Peter K
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