Re: [PATCH 04/11] Allow CONFIG_MIGRATION to be set withoutCONFIG_NUMA or memory hot-remove

[Mel Gorman]

On Thu, Mar 18, 2010 at 08:56:23AM +0900, KOSAKI Motohiro wrote:
> > On Wed, 17 Mar 2010, Mel Gorman wrote:
> > 
> > > > If select MIGRATION works, we can remove "depends on NUMA || ARCH_ENABLE_MEMORY_HOTREMOVE"
> > > > line from config MIGRATION.
> > > >
> > >
> > > I'm not quite getting why this would be an advantage. COMPACTION
> > > requires MIGRATION but conceivable both NUMA and HOTREMOVE can work
> > > without it.
> > 
> > Avoids having to add additional CONFIG_XXX on the page migration "depends"
> > line in the future.
> 
> Yes, Kconfig mess freqently shot ourself in past days. if we have a chance
> to remove unnecessary dependency, we should do. that's my intention of the last mail.
> 

But if the depends line is removed, it could be set without NUMA, memory
hot-remove or compaction enabled. That wouldn't be very useful. I'm
missing something obvious.

-- 
Mel Gorman
Part-time Phd Student                          Linux Technology Center
University of Limerick                         IBM Dublin Software Lab
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