On Mon, Jan 22, 2024 at 09:01:53PM +0800, Baolin Wang wrote: > It can not improve the fragmentation if we isolate the target free pages > exceeding cc->order, especially when the cc->order is less than pageblock_order. > For example, suppose the pageblock_order is MAX_ORDER (size is 4M) and cc->order > is 2M THP size, we should not isolate other 2M free pages to be the migration > target, which can not improve the fragmentation. > > Moreover this is also applicable for large folio compaction. > > Signed-off-by: Baolin Wang <baolin.wang@xxxxxxxxxxxxxxxxx> Acked-by: Mel Gorman <mgorman@xxxxxxxxxxxxxxxxxxx> -- Mel Gorman SUSE Labs
