[Intel-gfx] "MTRR allocation failed. Graphics performance may suffer" message

[Dmitry Nezhevenko]

Hi,

I've just noticed this in my dmesg:

[    0.950076] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
[    0.950148] i915 0000:00:02.0: setting latency timer to 64
[    0.983710] mtrr: type mismatch for d0000000,10000000 old: write-back new: write-combining
[    0.983795] [drm] MTRR allocation failed.  Graphics performance may suffer.
[    0.984128] i915 0000:00:02.0: irq 46 for MSI/MSI-X
[    0.984135] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[    0.984202] [drm] Driver supports precise vblank timestamp query.
[    1.174276] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem

Is it something important? Log is from 2.6.39 kernel but It's definitely not
2.6.38 -> 2.6.39 regression.

Graphics is followed:
00:02.0 VGA compatible controller: Intel Corporation Mobile 4 Series Chipset Integrated Graphics Controller (rev 07)

Full 2.6.39 dmesg
http://dion.org.ua/uploads/2011/05/dmesg_2.6.39.txt

-- 
WBR, Dmitry