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

[Jeremy Fitzhardinge]

Yinghai Lu wrote:
> On Friday 25 January 2008 10:55:31 am Jeremy Fitzhardinge wrote:
>   
> > Ingo Molnar wrote:
> >     
> > > * Yinghai Lu <Yinghai.Lu@xxxxxxx> 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?
>   

It was empty.  But ignore this report; it wasn't against the right 
version of x86.git.

   J
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