127 void defer_compaction(struct zone *zone, int order)  in defer_compaction()  argument
132 	if (order < zone->compact_order_failed)  in defer_compaction()
133 		zone->compact_order_failed = order;  in defer_compaction()
138 	trace_mm_compaction_defer_compaction(zone, order);  in defer_compaction()
142 bool compaction_deferred(struct zone *zone, int order)  in compaction_deferred()  argument
146 	if (order < zone->compact_order_failed)  in compaction_deferred()
156 	trace_mm_compaction_deferred(zone, order);  in compaction_deferred()
166 void compaction_defer_reset(struct zone *zone, int order,  in compaction_defer_reset()  argument
173 	if (order >= zone->compact_order_failed)  in compaction_defer_reset()
174 		zone->compact_order_failed = order + 1;  in compaction_defer_reset()
176 	trace_mm_compaction_defer_reset(zone, order);  in compaction_defer_reset()
180 bool compaction_restarting(struct zone *zone, int order)  in compaction_restarting()  argument
182 	if (order < zone->compact_order_failed)  in compaction_restarting()
1185 static inline bool is_via_compact_memory(int order)  in is_via_compact_memory()  argument
1187 	return order == -1;  in is_via_compact_memory()
1193 	unsigned int order;  in __compact_finished()  local
1216 	if (is_via_compact_memory(cc->order))  in __compact_finished()
1222 	if (!zone_watermark_ok(zone, cc->order, watermark, cc->classzone_idx,  in __compact_finished()
1227 	for (order = cc->order; order < MAX_ORDER; order++) {  in __compact_finished()
1228 		struct free_area *area = &zone->free_area[order];  in __compact_finished()
1245 		if (find_suitable_fallback(area, order, migratetype,  in __compact_finished()
1259 	trace_mm_compaction_finished(zone, cc->order, ret);  in compact_finished()
1273 static unsigned long __compaction_suitable(struct zone *zone, int order,  in __compaction_suitable()  argument
1279 	if (is_via_compact_memory(order))  in __compaction_suitable()
1287 	if (zone_watermark_ok(zone, order, watermark, classzone_idx,  in __compaction_suitable()
1296 	watermark += (2UL << order);  in __compaction_suitable()
1311 	fragindex = fragmentation_index(zone, order);  in __compaction_suitable()
1318 unsigned long compaction_suitable(struct zone *zone, int order,  in compaction_suitable()  argument
1323 	ret = __compaction_suitable(zone, order, alloc_flags, classzone_idx);  in compaction_suitable()
1324 	trace_mm_compaction_suitable(zone, order, ret);  in compaction_suitable()
1339 	ret = compaction_suitable(zone, cc->order, cc->alloc_flags,  in compact_zone()
1356 	if (compaction_restarting(zone, cc->order) && !current_is_kswapd())  in compact_zone()
1432 		if (cc->order > 0 && cc->last_migrated_pfn) {  in compact_zone()
1435 				cc->migrate_pfn & ~((1UL << cc->order) - 1);  in compact_zone()
1478 static unsigned long compact_zone_order(struct zone *zone, int order,  in compact_zone_order()  argument
1486 		.order = order,  in compact_zone_order()
1519 unsigned long try_to_compact_pages(gfp_t gfp_mask, unsigned int order,  in try_to_compact_pages()  argument
1533 	if (!order || !may_enter_fs || !may_perform_io)  in try_to_compact_pages()
1536 	trace_mm_compaction_try_to_compact_pages(order, gfp_mask, mode);  in try_to_compact_pages()
1544 		if (compaction_deferred(zone, order))  in try_to_compact_pages()
1547 		status = compact_zone_order(zone, order, gfp_mask, mode,  in try_to_compact_pages()
1558 		if (zone_watermark_ok(zone, order, low_wmark_pages(zone),  in try_to_compact_pages()
1566 			compaction_defer_reset(zone, order, false);  in try_to_compact_pages()
1587 			defer_compaction(zone, order);  in try_to_compact_pages()
1646 		if (is_via_compact_memory(cc->order))  in __compact_pgdat()
1649 		if (is_via_compact_memory(cc->order) ||  in __compact_pgdat()
1650 				!compaction_deferred(zone, cc->order))  in __compact_pgdat()
1653 		if (cc->order > 0) {  in __compact_pgdat()
1654 			if (zone_watermark_ok(zone, cc->order,  in __compact_pgdat()
1656 				compaction_defer_reset(zone, cc->order, false);  in __compact_pgdat()
1664 void compact_pgdat(pg_data_t *pgdat, int order)  in compact_pgdat()  argument
1667 		.order = order,  in compact_pgdat()
1671 	if (!order)  in compact_pgdat()
1680 		.order = -1,  in compact_node()