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SubjectRe: [PATCH] x86: mtrr cleanup for converting continuous to discrete - auto detect
On Thu, May 1, 2008 at 8:09 AM, Randy Dunlap <randy.dunlap@oracle.com> wrote:
> On Thu, 1 May 2008 01:00:34 -0700 Yinghai Lu wrote:
>
> >
> > loop mtrr chunk_size and gran_size from 1M to 2G to find out optimal value.
>
> What size step (increment) is used for these loops?
>
>
> > so user don't need to add mtrr_chunk_size and mtrr_gran_size,
> >
> > if optimal value is not found, print out all list to help select less optimal
> > value.
> >
> > add mtrr_spare_reg_nr= so user could set 2 instead of 1, if the card need more entries.
> >
> > Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
> >
>
>
> > Index: linux-2.6/Documentation/kernel-parameters.txt
> > ===================================================================
> > --- linux-2.6.orig/Documentation/kernel-parameters.txt
> > +++ linux-2.6/Documentation/kernel-parameters.txt
> > @@ -613,9 +613,17 @@ and is between 256 and 4096 characters.
> > that could hold holes aka. UC entries.
> >
> > mtrr_gran_size=nn[KMG] [X86]
> > - used for mtrr cleanup. It is granity of mtrr block.
> > + used for mtrr cleanup. It is granularity of mtrr block.
> > + default is 1.
>
> Default
>
>
> > Big value could prevent small alignment use up MTRRs.
>
> Large value could prevent small alignment from
> using up MTRRs.
>
>
> >
> > + mtrr_spare_reg_nr=n [X86]
> > + Format: <integer>
> > + range: 0,7 : spare reg number
> > + default : 1
> > + used for mtrr cleanup. It is spare mtrr entries number.
>
> Used
>
>
> > + set to 2 or more if your graphical card need more.
>
> Set needs more.
>
>
> > +
> > disable_mtrr_trim [X86, Intel and AMD only]
> > By default the kernel will trim any uncacheable
> > memory out of your available memory pool based on
>

Ingo, can you change that directly in the patch?
or need me send another updated patch?

YH


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