32 extern int fragmentation_index(struct zone *zone, unsigned int order);
36 			struct zone **candidate_zone);
39 extern unsigned long compaction_suitable(struct zone *zone, int order);
49 static inline void defer_compaction(struct zone *zone, int order)  in defer_compaction()  argument
51 	zone->compact_considered = 0;  in defer_compaction()
52 	zone->compact_defer_shift++;  in defer_compaction()
54 	if (order < zone->compact_order_failed)  in defer_compaction()
55 		zone->compact_order_failed = order;  in defer_compaction()
57 	if (zone->compact_defer_shift > COMPACT_MAX_DEFER_SHIFT)  in defer_compaction()
58 		zone->compact_defer_shift = COMPACT_MAX_DEFER_SHIFT;  in defer_compaction()
62 static inline bool compaction_deferred(struct zone *zone, int order)  in compaction_deferred()  argument
64 	unsigned long defer_limit = 1UL << zone->compact_defer_shift;  in compaction_deferred()
66 	if (order < zone->compact_order_failed)  in compaction_deferred()
70 	if (++zone->compact_considered > defer_limit)  in compaction_deferred()
71 		zone->compact_considered = defer_limit;  in compaction_deferred()
73 	return zone->compact_considered < defer_limit;  in compaction_deferred()
81 static inline void compaction_defer_reset(struct zone *zone, int order,  in compaction_defer_reset()  argument
85 		zone->compact_considered = 0;  in compaction_defer_reset()
86 		zone->compact_defer_shift = 0;  in compaction_defer_reset()
88 	if (order >= zone->compact_order_failed)  in compaction_defer_reset()
89 		zone->compact_order_failed = order + 1;  in compaction_defer_reset()
93 static inline bool compaction_restarting(struct zone *zone, int order)  in compaction_restarting()  argument
95 	if (order < zone->compact_order_failed)  in compaction_restarting()
98 	return zone->compact_defer_shift == COMPACT_MAX_DEFER_SHIFT &&  in compaction_restarting()
99 		zone->compact_considered >= 1UL << zone->compact_defer_shift;  in compaction_restarting()
106 			struct zone **candidate_zone)  in try_to_compact_pages()
119 static inline unsigned long compaction_suitable(struct zone *zone, int order)  in compaction_suitable()  argument
124 static inline void defer_compaction(struct zone *zone, int order)  in defer_compaction()  argument
128 static inline bool compaction_deferred(struct zone *zone, int order)  in compaction_deferred()  argument