lkml.org 
[lkml]   [2008]   [Oct]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: PAT and MTRRs
On Sun, 26 Oct 2008 17:21:41 -0700
"H. Peter Anvin" <hpa@zytor.com> wrote:

> Arjan van de Ven wrote:
> >
> > PAT can't make memory cachable that the MTRR's have as uncachable.
> > What PAT *can* do is, within an MTRR, do fine grained mapping...
> >
>
> Now, if it wasn't for the braindamage called ACPI and SMM, we could
> have cleared the MTRR settings and just used PAT...
>

yeah.. one thing we need to investigate is if we can set the default
"no mtrr coverage" value to cached
(and also.. to check we don't set that to uncached if the bios had it
set to cached..)


--
Arjan van de Ven Intel Open Source Technology Centre
For development, discussion and tips for ape savings,
visit http://www.lesswatts.org


\
 
 \ /
  Last update: 2008-10-27 01:37    [W:0.039 / U:0.188 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site