485  * If no pages were isolated then mark this pageblock to be skipped in the
610 		int isolated;  in isolate_freepages_block()  local
657 		isolated = __isolate_free_page(page, order);  in isolate_freepages_block()
658 		if (!isolated)  in isolate_freepages_block()
662 		nr_scanned += isolated - 1;  in isolate_freepages_block()
663 		total_isolated += isolated;  in isolate_freepages_block()
664 		cc->nr_freepages += isolated;  in isolate_freepages_block()
668 			blockpfn += isolated;  in isolate_freepages_block()
672 		blockpfn += isolated - 1;  in isolate_freepages_block()
673 		page += isolated - 1;  in isolate_freepages_block()
699 	 * pages requested were isolated. If there were any failures, 0 is  in isolate_freepages_block()
721  * Otherwise, function returns one-past-the-last PFN of isolated page
723  * a free page). cc->freepages[] contain free pages isolated.
729 	unsigned long isolated, pfn, block_start_pfn, block_end_pfn;  in isolate_freepages_range()  local
741 	for (; pfn < end_pfn; pfn += isolated,  in isolate_freepages_range()
748 		 * pfn could pass the block_end_pfn if isolated freepage  in isolate_freepages_range()
763 		isolated = isolate_freepages_block(cc, &isolate_start_pfn,  in isolate_freepages_range()
771 		if (!isolated)  in isolate_freepages_range()
797 	unsigned long active, inactive, isolated;  in too_many_isolated()  local
803 	isolated = node_page_state(pgdat, NR_ISOLATED_FILE) +  in too_many_isolated()
809 	 * compactors have already isolated to the limit, but are  in too_many_isolated()
817 	too_many = isolated > (inactive + active) / 2;  in too_many_isolated()
827  * @order:		to-be-isolated folio order
864  * The pages are isolated on cc->migratepages list (not required to be empty),
888 	 * Ensure that there are not too many pages isolated from the LRU  in isolate_migratepages_block()
890 	 * delay for some time until fewer pages are isolated  in isolate_migratepages_block()
920 			 * We have isolated all migration candidates in the  in isolate_migratepages_block()
1019 				 * Hugepage was successfully isolated and placed  in isolate_migratepages_block()
1030 			 * isolated. Fall-through as the check below handles  in isolate_migratepages_block()
1233 		/* Successfully isolated */  in isolate_migratepages_block()
1273 		 * We have isolated some pages, but then failed. Release them  in isolate_migratepages_block()
1322 	 * there were no pages isolated in the block or if the block is  in isolate_migratepages_block()
1653 		/* Skip fast search if enough freepages isolated */  in fast_isolate_freepages()
1728 	 * successfully isolated from, zone-cached value, or the end of the  in isolate_freepages()
1747 	 * and free page scanners meet or enough free pages are isolated.  in isolate_freepages()
1791 		/* Are enough freepages isolated? */  in isolate_freepages()
1796 				 * freepages can be isolated next time.  in isolate_freepages()
1829  * from the isolated freelists in the block we are migrating to.
1884  * This is a migrate-callback that "frees" freepages back to the isolated
1909 	ISOLATE_NONE,		/* No pages isolated, continue scanning */
1910 	ISOLATE_SUCCESS,	/* Pages isolated, migrate */
2169 		 * Either we isolated something and proceed with migration. Or  in isolate_migratepages()
2598 		 * happen if a page cannot be isolated (dirty/writeback in  in compact_zone()
2624 			 * We haven't isolated and migrated anything, but  in compact_zone()