786 isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,  in isolate_migratepages_block()  argument
796 	unsigned long start_pfn = low_pfn;  in isolate_migratepages_block()
802 	cc->migrate_pfn = low_pfn;  in isolate_migratepages_block()
828 		next_skip_pfn = block_end_pfn(low_pfn, cc->order);  in isolate_migratepages_block()
832 	for (; low_pfn < end_pfn; low_pfn++) {  in isolate_migratepages_block()
834 		if (skip_on_failure && low_pfn >= next_skip_pfn) {  in isolate_migratepages_block()
853 			next_skip_pfn = block_end_pfn(low_pfn, cc->order);  in isolate_migratepages_block()
861 		if (!(low_pfn % COMPACT_CLUSTER_MAX)) {  in isolate_migratepages_block()
879 		page = pfn_to_page(low_pfn);  in isolate_migratepages_block()
887 		if (!valid_page && pageblock_aligned(low_pfn)) {  in isolate_migratepages_block()
889 				low_pfn = end_pfn;  in isolate_migratepages_block()
907 				low_pfn += compound_nr(page) - 1;  in isolate_migratepages_block()
916 				low_pfn += compound_nr(page) - 1;  in isolate_migratepages_block()
943 				low_pfn += (1UL << freepage_order) - 1;  in isolate_migratepages_block()
959 				low_pfn += (1UL << order) - 1;  in isolate_migratepages_block()
1070 				if (test_and_set_skip(cc, page, low_pfn))  in isolate_migratepages_block()
1080 				low_pfn += compound_nr(page) - 1;  in isolate_migratepages_block()
1088 			low_pfn += compound_nr(page) - 1;  in isolate_migratepages_block()
1111 			++low_pfn;  in isolate_migratepages_block()
1144 		if (low_pfn < next_skip_pfn) {  in isolate_migratepages_block()
1145 			low_pfn = next_skip_pfn - 1;  in isolate_migratepages_block()
1161 	if (unlikely(low_pfn > end_pfn))  in isolate_migratepages_block()
1162 		low_pfn = end_pfn;  in isolate_migratepages_block()
1182 	if (low_pfn == end_pfn && (!nr_isolated || cc->rescan)) {  in isolate_migratepages_block()
1185 		update_cached_migrate(cc, low_pfn);  in isolate_migratepages_block()
1188 	trace_mm_compaction_isolate_migratepages(start_pfn, low_pfn,  in isolate_migratepages_block()
1196 	cc->migrate_pfn = low_pfn;  in isolate_migratepages_block()
1408 	unsigned long low_pfn, min_pfn, highest = 0;  in fast_isolate_freepages()  local
1433 	low_pfn = pageblock_start_pfn(cc->free_pfn - (distance >> 2));  in fast_isolate_freepages()
1436 	if (WARN_ON_ONCE(min_pfn > low_pfn))  in fast_isolate_freepages()
1437 		low_pfn = min_pfn;  in fast_isolate_freepages()
1471 			if (pfn >= low_pfn) {  in fast_isolate_freepages()
1558 	low_pfn = page_to_pfn(page);  in fast_isolate_freepages()
1559 	fast_isolate_around(cc, low_pfn, nr_isolated);  in fast_isolate_freepages()
1560 	return low_pfn;  in fast_isolate_freepages()
1574 	unsigned long low_pfn;	     /* lowest pfn scanner is able to scan */  in isolate_freepages()  local
1598 	low_pfn = pageblock_end_pfn(cc->migrate_pfn);  in isolate_freepages()
1606 	for (; block_start_pfn >= low_pfn;  in isolate_freepages()
1878 	unsigned long low_pfn;  in isolate_migratepages()  local
1890 	low_pfn = fast_find_migrateblock(cc);  in isolate_migratepages()
1891 	block_start_pfn = pageblock_start_pfn(low_pfn);  in isolate_migratepages()
1900 	fast_find_block = low_pfn != cc->migrate_pfn && !cc->fast_search_fail;  in isolate_migratepages()
1903 	block_end_pfn = pageblock_end_pfn(low_pfn);  in isolate_migratepages()
1911 			cc->migrate_pfn = low_pfn = block_end_pfn,  in isolate_migratepages()
1920 		if (!(low_pfn % (COMPACT_CLUSTER_MAX * pageblock_nr_pages)))  in isolate_migratepages()
1935 		if (pageblock_aligned(low_pfn) &&  in isolate_migratepages()
1953 		if (isolate_migratepages_block(cc, low_pfn, block_end_pfn,  in isolate_migratepages()