Re: [PATCH] x86: trim ram need to check if mtrr is there v3

[Yinghai Lu <Yinghai.Lu@Sun.COM>]

On Friday 25 January 2008 10:55:31 am Jeremy Fitzhardinge wrote:
> Ingo Molnar wrote:
> > * Yinghai Lu <Yinghai.Lu@Sun.COM> wrote:
> >
> >   
> >> [PATCH] x86: trim ram need to check if mtrr is there v3
> >>     
> >
> >   
> >>> H. Peter Anvin wrote:
> >>> Looks like the code doesn't check that the CPU *has* MTRRs...
> >>>       
> >> so more strict check if mtrr is there really.
> >> bail out if mtrr all blank when qemu cpu model is used
> >>
> >> and check if is AMD as early
> >> also remove 4G less check, according to hpa.
> >>     
> >
> > thanks, applied. Shouldnt we put in an exception for when there is MTRR 
> > support, but they dont cover anything. Still emit a warning - but 
> > booting up real slow is still better than losing all of RAM and crashing 
> >   
> 
> The problem is re-occuring for me with current x86.git.  Looks like v2 
> did the trick, and v3 is broken...

so the ram size less 4g is way out for your case.

again, can you post /proc/mtrrs with v2 patch?

Thanks

YH