Messages in this thread | | | Date | Sun, 27 Apr 2008 22:50:20 -0700 | From | Arjan van de Ven <> | Subject | Re: [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v2 |
| |
On Mon, 28 Apr 2008 17:28:21 +0200 Mika Fischer <mika.fischer@zoopnet.de> wrote:
> Arjan van de Ven schrieb: > > yep one should not touch existing MTRRs. If you run out, tough luck. > > Thats what we have PAT for. > > Changing them anyway is a deathtrap with various things, > > suspend/resume being only one of the nasty cases. > > Hm. I currently have to remove the offending (i.e. overlapping my > video memory) MTRRs and split them so that they have a hole where my > video memory is.
I'm not arguing that it sometimes works. It's just a big trap to default enable ;(
> > Ah, so the new X will be able to use the video memory in > write-combining mode even if I have an MTRR saying this area is > uncachable or write-back?
yes. When it gets released...
| |