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SubjectRe: [PATCH] Add __GFP_MOVABLE for callers to flag allocations that may be migrated
On Tue, 5 Dec 2006, Andrew Morton wrote:

> > We always run reclaim against the whole zone not against parts. Why
> > would we start running reclaim against a portion of a zone?
>
> Oh for gawd's sake.

Yes indeed. Another failure to answer a simple question.

> If you want to allocate a page from within the first 1/4 of a zone, and if
> all those pages are in use for something else then you'll need to run
> reclaim against the first 1/4 of that zone. Or fail the allocation. Or
> run reclaim against the entire zone. The second two options are
> self-evidently dumb.

Why would one want to allocate from the 1/4th of a zone? (Are we still
discussing Mel's antifrag scheme or what is this about?)


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