Re: strange MTRR on 2.6.29-git
From: Meelis Roos
Date: Sun Apr 05 2009 - 03:12:23 EST
> > reg00: base=0x000000000 ( 0MB), size= 512MB, count=1: write-back
> > reg01: base=0x020000000 ( 512MB), size= 1MB, count=1: write-back
> > reg02: base=0x020000000 ( 512MB), size= 1MB, count=1: uncachable
> > reg03: base=0x0f2000000 ( 3872MB), size= 32MB, count=2: write-combining
> > reg04: base=0x0f8000000 ( 3968MB), size= 64MB, count=1: write-combining
> that is original setting by BIOS.
> it should be ok.
> if you like, could try to enable
>
> CONFIG_MTRR=y
> CONFIG_MTRR_SANITIZER=y
> CONFIG_MTRR_SANITIZER_ENABLE_DEFAULT=1
> CONFIG_MTRR_SANITIZER_SPARE_REG_NR_DEFAULT=1
>
> it could do the clean up for you.
Thank you, it did clean it up:
reg00: base=0x000000000 ( 0MB), size= 512MB, count=1: write-back
reg01: base=0x0f2000000 ( 3872MB), size= 32MB, count=2: write-combining
reg02: base=0x0f8000000 ( 3968MB), size= 64MB, count=1: write-combining
and it removed the overlapping MTRR-s altogether since there was no RAM
described t be here. Seems to work fine.
--
Meelis Roos (mroos@xxxxxxxx)