2.6.16-rc6-mm2: Why is CONFIG_MIGRATION available for everyone?

[Adrian Bunk]

On Sat, Mar 18, 2006 at 04:40:56AM -0800, Andrew Morton wrote:
>...
> Changes since 2.6.16-rc6-mm1:
>...
> +page-migration-reorg.patch
>...
>  Reorganise the page migration code
>...

The patch description includes:

5. Make it possible to configure NUMA systems without page migration
   and non-NUMA systems with page migration.


I don't see the point in making this option visible for the majority of 
users on non-NUMA systems who will never need it.

When is it required on non-NUMA systems?
Memory hotplug?
Can we express this explicitely?

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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