Subject: Re: pageable kernel pmap entries
To: Jonathan Stone <jonathan@DSG.Stanford.EDU>
From: Jason Thorpe <>
List: tech-kern
Date: 05/03/1999 16:02:16
On Mon, 03 May 1999 15:44:05 -0700 
 Jonathan Stone <jonathan@DSG.Stanford.EDU> wrote:

 > >What downside are you talking about?
 > more TLB misses, more TLB thrashing, ....
 > I did *ask* for some justfication of why we were doing this, why it
 > was necesary, what the costs were.... In short, what the performance
 > tradeoffs were.
 > I never saw an answer.

Okay... so, pageable kernel page table entries means "pmap_enter() called
with the `wired' parameter set to FALSE".

I.e. "just like user mappings".

I don't understand what your issue is with it.

        -- Jason R. Thorpe <>