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

[Andrey Falko]

On Sun, May 11, 2008 at 3:49 AM, pk <peterk2@××××××××.se> wrote:
> 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

What kernel version are you using? How are you compiling your kernel
(i.e. with genkernel or manually)? If you are manually compiling your
kernel, can you send us your .config file?
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