Subject: Re: 4MB pages?
To: Bill Sommerfeld <sommerfeld@orchard.arlington.ma.us>
From: Jason R Thorpe <thorpej@zembu.com>
List: tech-kern
Date: 09/06/2000 10:55:42
On Wed, Sep 06, 2000 at 01:33:39PM -0400, Bill Sommerfeld wrote:
> The intel feature bits are:
> PSE 4mb page
> PAE 36 bit physical addresses
> PSE36 36 bit PA / 2mb page.
>
> You get 4K/4MB pages with 32 bit PA's and 32 bit PTE's (PSE)
> You get 4K/2MB pages with 36 bit PA's and 64 bit PTE's (PAE, PSE36)
Actually, as I understand it, PSE36 is something totally separate. PSE36
is a way to access the higher PAs using 4MB pages without using the large
PTE format.
--
-- Jason R. Thorpe <thorpej@zembu.com>