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SubjectRe: [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v3
On Mon, Apr 28, 2008 at 1:15 PM, Ingo Molnar <mingo@elte.hu> wrote:
>
> * Yinghai Lu <yhlu.kernel.send@gmail.com> wrote:
>
> > some BIOS like to use continus MTRR layout, and some X driver can not
> > add WB entries for graphical cards when 4g or more RAM installed.
> >
> > the patch will change MTRR to discrete.
> >
> > mtrr_chunk_size= could be used to have smaller continuous block to
> > hold holes. default is 256m, could be set according to size of
> > graphics card memory.
> >
> > v2: fix -1 for UC checking
>
> > v3: default to disable, and need use enable_mtrr_cleanup to enable
> > this feature
> > skip the var state change warning.
> > remove next_basek in range_to_mtrr()
>
> a boot option is often inconvenient though - could you perhaps also make
> this a Kconfig option, with it defaulting to off? Something like
> CONFIG_MTRR_SANITIZE=y or so? That way distros can make a conscious
> decision as well whether they want this feature (for the Xorg they pick)
> or not.

use disable_mtrr_cleanup and CONFIG_MTRR_SANITIZER?

YH


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