138 void defer_compaction(struct zone *zone, int order)  in defer_compaction()  argument
143 	if (order < zone->compact_order_failed)  in defer_compaction()
144 		zone->compact_order_failed = order;  in defer_compaction()
149 	trace_mm_compaction_defer_compaction(zone, order);  in defer_compaction()
153 bool compaction_deferred(struct zone *zone, int order)  in compaction_deferred()  argument
157 	if (order < zone->compact_order_failed)  in compaction_deferred()
167 	trace_mm_compaction_deferred(zone, order);  in compaction_deferred()
177 void compaction_defer_reset(struct zone *zone, int order,  in compaction_defer_reset()  argument
184 	if (order >= zone->compact_order_failed)  in compaction_defer_reset()
185 		zone->compact_order_failed = order + 1;  in compaction_defer_reset()
187 	trace_mm_compaction_defer_reset(zone, order);  in compaction_defer_reset()
191 bool compaction_restarting(struct zone *zone, int order)  in compaction_restarting()  argument
193 	if (order < zone->compact_order_failed)  in compaction_restarting()
1135 	unsigned int order;  in __compact_finished()  local
1164 	if (cc->order == -1)  in __compact_finished()
1170 	if (!zone_watermark_ok(zone, cc->order, watermark, cc->classzone_idx,  in __compact_finished()
1175 	for (order = cc->order; order < MAX_ORDER; order++) {  in __compact_finished()
1176 		struct free_area *area = &zone->free_area[order];  in __compact_finished()
1193 		if (find_suitable_fallback(area, order, migratetype,  in __compact_finished()
1207 	trace_mm_compaction_finished(zone, cc->order, ret);  in compact_finished()
1221 static unsigned long __compaction_suitable(struct zone *zone, int order,  in __compaction_suitable()  argument
1231 	if (order == -1)  in __compaction_suitable()
1239 	if (zone_watermark_ok(zone, order, watermark, classzone_idx,  in __compaction_suitable()
1248 	watermark += (2UL << order);  in __compaction_suitable()
1263 	fragindex = fragmentation_index(zone, order);  in __compaction_suitable()
1270 unsigned long compaction_suitable(struct zone *zone, int order,  in compaction_suitable()  argument
1275 	ret = __compaction_suitable(zone, order, alloc_flags, classzone_idx);  in compaction_suitable()
1276 	trace_mm_compaction_suitable(zone, order, ret);  in compaction_suitable()
1292 	ret = compaction_suitable(zone, cc->order, cc->alloc_flags,  in compact_zone()
1309 	if (compaction_restarting(zone, cc->order) && !current_is_kswapd())  in compact_zone()
1395 		if (cc->order > 0 && last_migrated_pfn) {  in compact_zone()
1398 				cc->migrate_pfn & ~((1UL << cc->order) - 1);  in compact_zone()
1438 static unsigned long compact_zone_order(struct zone *zone, int order,  in compact_zone_order()  argument
1446 		.order = order,  in compact_zone_order()
1479 unsigned long try_to_compact_pages(gfp_t gfp_mask, unsigned int order,  in try_to_compact_pages()  argument
1493 	if (!order || !may_enter_fs || !may_perform_io)  in try_to_compact_pages()
1496 	trace_mm_compaction_try_to_compact_pages(order, gfp_mask, mode);  in try_to_compact_pages()
1504 		if (compaction_deferred(zone, order))  in try_to_compact_pages()
1507 		status = compact_zone_order(zone, order, gfp_mask, mode,  in try_to_compact_pages()
1518 		if (zone_watermark_ok(zone, order, low_wmark_pages(zone),  in try_to_compact_pages()
1526 			compaction_defer_reset(zone, order, false);  in try_to_compact_pages()
1547 			defer_compaction(zone, order);  in try_to_compact_pages()
1606 		if (cc->order == -1)  in __compact_pgdat()
1609 		if (cc->order == -1 || !compaction_deferred(zone, cc->order))  in __compact_pgdat()
1612 		if (cc->order > 0) {  in __compact_pgdat()
1613 			if (zone_watermark_ok(zone, cc->order,  in __compact_pgdat()
1615 				compaction_defer_reset(zone, cc->order, false);  in __compact_pgdat()
1623 void compact_pgdat(pg_data_t *pgdat, int order)  in compact_pgdat()  argument
1626 		.order = order,  in compact_pgdat()
1630 	if (!order)  in compact_pgdat()
1639 		.order = -1,  in compact_node()