Subject: Re: 4MB pages?
To: Hubert Feyrer <>
From: Jason R Thorpe <>
List: tech-kern
Date: 09/06/2000 07:11:15
On Wed, Sep 06, 2000 at 02:10:05PM +0200, Hubert Feyrer wrote:

 > 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? 

No, the i386 port will use a combination of 4K and 4MB pages.  The idea is
to use a 4MB page for the kernel text+data+bss to reduce TLB usage for the
kernel, thus improving overall performance.

See the Intel IA32 system programmers reference manual.

        -- Jason R. Thorpe <>