linux-kernel - Re: PAT and MTRRs

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Date:	Tue, 11 Nov 2008 13:30:04 -0100
From:	"Diego M. Vadell" <dvadell@...uxclusters.com.ar>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: PAT and MTRRs

> your bios doesn't cover 4g above RAM..
>
> please do
> 1. boot linux with "disable_mtrr_trim"
> 2. after booting input:
> echo "base=0x100000000 size=0x20000000 type=write-back" >/proc/mtrr
> echo "base=0x120000000 size=0x8000000 type=write-back" >/proc/mtrr
> echo "base=0x128000000 size=0x4000000 type=write-back" >/proc/mtrr
>
> later you could put those three lines in one scripts and call it from
> inittab # grep mtrrfixup /etc/inittab
> mtrrfixup:345:once:/root/mtrrfixup.sh
>
> YH
> --

Hi,

   It worked! It takes 10 minutes to boot, but it gets speedy somewhere in the 
booting process. I checked the memory speed with "stream" and its working.

   Just for the record, I had to change the line in /etc/inittab 
to "mtrr:345:once:/root/mtrrfixup.sh" or else, init would complain about the 
first field being more than 4 characters.

   Thank you very much

 -- Diego 
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