Re: [PATCH] x86: mtrr cleanup for converting continuous to discrete layout v3

[Yinghai Lu]

On Mon, Apr 28, 2008 at 1:15 PM, Ingo Molnar <mingo@xxxxxxx> wrote:
>
>  * Yinghai Lu <yhlu.kernel.send@xxxxxxxxx> 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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