692 isolate_migratepages_block(struct compact_control *cc, unsigned long low_pfn,  in isolate_migratepages_block()  argument
701 	unsigned long start_pfn = low_pfn;  in isolate_migratepages_block()
726 		next_skip_pfn = block_end_pfn(low_pfn, cc->order);  in isolate_migratepages_block()
730 	for (; low_pfn < end_pfn; low_pfn++) {  in isolate_migratepages_block()
732 		if (skip_on_failure && low_pfn >= next_skip_pfn) {  in isolate_migratepages_block()
751 			next_skip_pfn = block_end_pfn(low_pfn, cc->order);  in isolate_migratepages_block()
759 		if (!(low_pfn % SWAP_CLUSTER_MAX)  in isolate_migratepages_block()
764 		if (!pfn_valid_within(low_pfn))  in isolate_migratepages_block()
768 		page = pfn_to_page(low_pfn);  in isolate_migratepages_block()
788 				low_pfn += (1UL << freepage_order) - 1;  in isolate_migratepages_block()
803 				low_pfn += (1UL << order) - 1;  in isolate_migratepages_block()
865 				low_pfn += (1UL << compound_order(page)) - 1;  in isolate_migratepages_block()
895 			cc->last_migrated_pfn = low_pfn;  in isolate_migratepages_block()
899 			++low_pfn;  in isolate_migratepages_block()
924 		if (low_pfn < next_skip_pfn) {  in isolate_migratepages_block()
925 			low_pfn = next_skip_pfn - 1;  in isolate_migratepages_block()
938 	if (unlikely(low_pfn > end_pfn))  in isolate_migratepages_block()
939 		low_pfn = end_pfn;  in isolate_migratepages_block()
948 	if (low_pfn == end_pfn)  in isolate_migratepages_block()
951 	trace_mm_compaction_isolate_migratepages(start_pfn, low_pfn,  in isolate_migratepages_block()
958 	return low_pfn;  in isolate_migratepages_block()
1073 	unsigned long low_pfn;	     /* lowest pfn scanner is able to scan */  in isolate_freepages()  local
1091 	low_pfn = pageblock_end_pfn(cc->migrate_pfn);  in isolate_freepages()
1098 	for (; block_start_pfn >= low_pfn;  in isolate_freepages()
1229 	unsigned long low_pfn;  in isolate_migratepages()  local
1239 	low_pfn = cc->migrate_pfn;  in isolate_migratepages()
1240 	block_start_pfn = pageblock_start_pfn(low_pfn);  in isolate_migratepages()
1245 	block_end_pfn = pageblock_end_pfn(low_pfn);  in isolate_migratepages()
1252 			low_pfn = block_end_pfn,  in isolate_migratepages()
1261 		if (!(low_pfn % (SWAP_CLUSTER_MAX * pageblock_nr_pages))  in isolate_migratepages()
1283 		low_pfn = isolate_migratepages_block(cc, low_pfn,  in isolate_migratepages()
1286 		if (!low_pfn || cc->contended)  in isolate_migratepages()
1298 	cc->migrate_pfn = low_pfn;  in isolate_migratepages()