On Thu, Oct 08, 2020 at 01:42:00PM +0200, Vlastimil Babka wrote:
> Currently, pcplists are drained during set_migratetype_isolate() which means
> once per pageblock processed start_isolate_page_range(). This is somewhat
> wasteful. Moreover, the callers might need different guarantees, and the
>
Currently, pcplists are drained during set_migratetype_isolate() which means
once per pageblock processed start_isolate_page_range(). This is somewhat
wasteful. Moreover, the callers might need different guarantees, and the
draining is currently prone to races and does not guarantee that no page
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