lkml.org 
[lkml]   [2008]   [May]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] x86: mtrr cleanup for converting continuous to discrete - auto detect v2
On Thu, May 1, 2008 at 2:26 PM, H. Peter Anvin <hpa@zytor.com> wrote:
> Yinghai Lu wrote:
>
> >
> > >
> > > >
> > > >
> > > Yes, 16 GB systems are already mainstream; 32 GB is common, so I don't
> see
> > > any reason to stop at 2 GB. Instead, it should loop up to the physical
> > > address size.
> > >
> >
> > but our objective is that has 0xd0000000-0xe0000000 (WC) not to be
> > overlapping with other MTRR entries (UC)..
> >
> >
>
> So, pray tell, how comes this algorithm can come up with a non-solution to
> the problem presented to it?
>
> Overall, I'm feeling there is something really completely wrong if this
> needs manual tunables of any sort.

the problem is BIOS set MTRR like BIG WB - SOME SAMLL UC to spare mtrr regs.

but later X server driver want to set some range to WC. that already
is fallen in UC...

YH


\
 
 \ /
  Last update: 2008-05-01 23:33    [W:0.096 / U:0.468 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site