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SubjectRe: [RFC 13/16] mm/cma: populate ZONE_CMA and use this zone when GFP_HIGHUSERMOVABLE

2015-02-12 오후 4:32에 Joonsoo Kim 이(가) 쓴 글:
> Until now, reserved pages for CMA are managed altogether with normal
> page in the same zone. This approach has numorous problems and fixing
> them isn't easy. To fix this situation, ZONE_CMA is introduced in
> previous patch, but, not yet populated. This patch implement population
> of ZONE_CMA by stealing reserved pages from normal zones. This stealing
> break one uncertain assumption on zone, that is, zone isn't overlapped.
> In the early of this series, some check is inserted to every zone's span
> iterator to handle zone overlap so there would be no problem with
> this assumption break.
> To utilize this zone, user should use GFP_HIGHUSERMOVABLE, because

I think it might be typo of GFP_HIGHUSER_MOVABLE.

> these pages are only applicable for movable type and ZONE_CMA could
> contain highmem.

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