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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 | #ifndef _LINUX_COMPACTION_H #define _LINUX_COMPACTION_H /* Return values for compact_zone() and try_to_compact_pages() */ /* compaction didn't start as it was deferred due to past failures */ #define COMPACT_DEFERRED 0 /* compaction didn't start as it was not possible or direct reclaim was more suitable */ #define COMPACT_SKIPPED 1 /* compaction should continue to another pageblock */ #define COMPACT_CONTINUE 2 /* direct compaction partially compacted a zone and there are suitable pages */ #define COMPACT_PARTIAL 3 /* The full zone was compacted */ #define COMPACT_COMPLETE 4 /* For more detailed tracepoint output */ #define COMPACT_NO_SUITABLE_PAGE 5 #define COMPACT_NOT_SUITABLE_ZONE 6 #define COMPACT_CONTENDED 7 /* When adding new states, please adjust include/trace/events/compaction.h */ /* Used to signal whether compaction detected need_sched() or lock contention */ /* No contention detected */ #define COMPACT_CONTENDED_NONE 0 /* Either need_sched() was true or fatal signal pending */ #define COMPACT_CONTENDED_SCHED 1 /* Zone lock or lru_lock was contended in async compaction */ #define COMPACT_CONTENDED_LOCK 2 struct alloc_context; /* in mm/internal.h */ #ifdef CONFIG_COMPACTION extern int sysctl_compact_memory; extern int sysctl_compaction_handler(struct ctl_table *table, int write, void __user *buffer, size_t *length, loff_t *ppos); extern int sysctl_extfrag_threshold; extern int sysctl_extfrag_handler(struct ctl_table *table, int write, void __user *buffer, size_t *length, loff_t *ppos); extern int sysctl_compact_unevictable_allowed; extern int fragmentation_index(struct zone *zone, unsigned int order); extern unsigned long try_to_compact_pages(gfp_t gfp_mask, unsigned int order, int alloc_flags, const struct alloc_context *ac, enum migrate_mode mode, int *contended); extern void compact_pgdat(pg_data_t *pgdat, int order); extern void reset_isolation_suitable(pg_data_t *pgdat); extern unsigned long compaction_suitable(struct zone *zone, int order, int alloc_flags, int classzone_idx); extern void defer_compaction(struct zone *zone, int order); extern bool compaction_deferred(struct zone *zone, int order); extern void compaction_defer_reset(struct zone *zone, int order, bool alloc_success); extern bool compaction_restarting(struct zone *zone, int order); #else static inline unsigned long try_to_compact_pages(gfp_t gfp_mask, unsigned int order, int alloc_flags, const struct alloc_context *ac, enum migrate_mode mode, int *contended) { return COMPACT_CONTINUE; } static inline void compact_pgdat(pg_data_t *pgdat, int order) { } static inline void reset_isolation_suitable(pg_data_t *pgdat) { } static inline unsigned long compaction_suitable(struct zone *zone, int order, int alloc_flags, int classzone_idx) { return COMPACT_SKIPPED; } static inline void defer_compaction(struct zone *zone, int order) { } static inline bool compaction_deferred(struct zone *zone, int order) { return true; } #endif /* CONFIG_COMPACTION */ #if defined(CONFIG_COMPACTION) && defined(CONFIG_SYSFS) && defined(CONFIG_NUMA) extern int compaction_register_node(struct node *node); extern void compaction_unregister_node(struct node *node); #else static inline int compaction_register_node(struct node *node) { return 0; } static inline void compaction_unregister_node(struct node *node) { } #endif /* CONFIG_COMPACTION && CONFIG_SYSFS && CONFIG_NUMA */ #endif /* _LINUX_COMPACTION_H */ |