Arch Linux

lynix

Member

From: Karlsruhe, Germany

Registered: 2008-04-23

Posts: 230

Inconsistent MTRR settings

Anyone else having these lines in dmesg?

[    0.354461] mtrr: your CPUs had inconsistent fixed MTRR settings
[    0.354462] mtrr: probably your BIOS does not setup all CPUs.
[    0.354463] mtrr: corrected configuration.
[    1.680222] mtrr: type mismatch for f9000000,1000000 old: write-back new: write-combining
[    1.680224] mtrr: type mismatch for f9000000,800000 old: write-back new: write-combining
[    1.680226] mtrr: type mismatch for f9000000,400000 old: write-back new: write-combining
[    1.680228] mtrr: type mismatch for f9000000,200000 old: write-back new: write-combining
[    1.680230] mtrr: type mismatch for f9000000,100000 old: write-back new: write-combining
[    1.680232] mtrr: type mismatch for f9000000,80000 old: write-back new: write-combining
[    1.680233] mtrr: type mismatch for f9000000,40000 old: write-back new: write-combining
[    1.680235] mtrr: type mismatch for f9000000,20000 old: write-back new: write-combining
[    1.680237] mtrr: type mismatch for f9000000,10000 old: write-back new: write-combining
[    1.680239] mtrr: type mismatch for f9000000,8000 old: write-back new: write-combining
[    1.680240] mtrr: type mismatch for f9000000,4000 old: write-back new: write-combining
[    1.680242] mtrr: type mismatch for f9000000,2000 old: write-back new: write-combining
[    1.680244] mtrr: type mismatch for f9000000,1000 old: write-back new: write-combining

The only posts about mtrr mismatches I found are quite old and the fixes mentioned don't work for me. I only see these lines since upgrading to around kernel 3.1, so I doubt it's my BIOS

Regards

lynix

moetunes

Member

From: A comfortable couch

Registered: 2010-10-09

Posts: 1,033

Re: Inconsistent MTRR settings

I have

[ ~ ]$ dmesg | grep -i mtrr
[    0.000000] MTRR default type: uncachable
[    0.000000] MTRR fixed ranges enabled:
[    0.000000] MTRR variable ranges enabled:
[    1.737632] mtrr: no more MTRRs available
[    1.737637] [drm] MTRR allocation failed.  Graphics performance may suffer.

No mismatches but I have some fixin' to do it seems...

---

You're just jealous because the voices only talk to me.

el mariachi

Member

Registered: 2007-11-30

Posts: 595

Re: Inconsistent MTRR settings

I have

☁  ~  dmesg | grep -i mtrr
[    0.000000] MTRR default type: uncachable
[    0.000000] MTRR fixed ranges enabled:
[    0.000000] MTRR variable ranges enabled:
[    6.364707] mtrr: type mismatch for e0000000,10000000 old: write-back new: write-combining
[    6.364711] [drm] MTRR allocation failed.  Graphics performance may suffer.