Subject: 4MB pages?
To: Jason R Thorpe <>
From: Hubert Feyrer <>
List: tech-kern
Date: 09/06/2000 14:10:05
On Wed, 6 Sep 2000, Jason R Thorpe wrote:
> Modified Files:
> 	syssrc/sys/arch/i386/i386: pmap.c
> Log Message:
> In pmap_extract():
> - Return FALSE if the PTE does not have PG_V set (previously, you would
>   get always get true of the PDE was valid, even if the PTE was not).
> - Teach it about 4MB pages.

Seeing this jump from few kb pages to few MB pages looks ... interresting.
What's the background on this?
Is it intended to make switch pagesize on i386 unconditionally? 

Do you have pointers to docs we can give people, or other documentation on
that? :)

 - Hubert

Hubert Feyrer <>