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105 lines
3.4 KiB
105 lines
3.4 KiB
#ifndef _LINUX_COMPACTION_H |
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#define _LINUX_COMPACTION_H |
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/* Return values for compact_zone() and try_to_compact_pages() */ |
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/* compaction didn't start as it was deferred due to past failures */ |
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#define COMPACT_DEFERRED 0 |
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/* compaction didn't start as it was not possible or direct reclaim was more suitable */ |
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#define COMPACT_SKIPPED 1 |
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/* compaction should continue to another pageblock */ |
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#define COMPACT_CONTINUE 2 |
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/* direct compaction partially compacted a zone and there are suitable pages */ |
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#define COMPACT_PARTIAL 3 |
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/* The full zone was compacted */ |
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#define COMPACT_COMPLETE 4 |
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/* For more detailed tracepoint output */ |
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#define COMPACT_NO_SUITABLE_PAGE 5 |
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#define COMPACT_NOT_SUITABLE_ZONE 6 |
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#define COMPACT_CONTENDED 7 |
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/* When adding new states, please adjust include/trace/events/compaction.h */ |
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/* Used to signal whether compaction detected need_sched() or lock contention */ |
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/* No contention detected */ |
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#define COMPACT_CONTENDED_NONE 0 |
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/* Either need_sched() was true or fatal signal pending */ |
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#define COMPACT_CONTENDED_SCHED 1 |
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/* Zone lock or lru_lock was contended in async compaction */ |
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#define COMPACT_CONTENDED_LOCK 2 |
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struct alloc_context; /* in mm/internal.h */ |
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#ifdef CONFIG_COMPACTION |
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extern int sysctl_compact_memory; |
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extern int sysctl_compaction_handler(struct ctl_table *table, int write, |
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void __user *buffer, size_t *length, loff_t *ppos); |
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extern int sysctl_extfrag_threshold; |
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extern int sysctl_extfrag_handler(struct ctl_table *table, int write, |
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void __user *buffer, size_t *length, loff_t *ppos); |
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extern int sysctl_compact_unevictable_allowed; |
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extern int fragmentation_index(struct zone *zone, unsigned int order); |
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extern unsigned long try_to_compact_pages(gfp_t gfp_mask, unsigned int order, |
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int alloc_flags, const struct alloc_context *ac, |
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enum migrate_mode mode, int *contended); |
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extern void compact_pgdat(pg_data_t *pgdat, int order); |
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extern void reset_isolation_suitable(pg_data_t *pgdat); |
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extern unsigned long compaction_suitable(struct zone *zone, int order, |
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int alloc_flags, int classzone_idx); |
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extern void defer_compaction(struct zone *zone, int order); |
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extern bool compaction_deferred(struct zone *zone, int order); |
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extern void compaction_defer_reset(struct zone *zone, int order, |
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bool alloc_success); |
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extern bool compaction_restarting(struct zone *zone, int order); |
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#else |
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static inline unsigned long try_to_compact_pages(gfp_t gfp_mask, |
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unsigned int order, int alloc_flags, |
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const struct alloc_context *ac, |
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enum migrate_mode mode, int *contended) |
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{ |
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return COMPACT_CONTINUE; |
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} |
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static inline void compact_pgdat(pg_data_t *pgdat, int order) |
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{ |
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} |
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static inline void reset_isolation_suitable(pg_data_t *pgdat) |
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{ |
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} |
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static inline unsigned long compaction_suitable(struct zone *zone, int order, |
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int alloc_flags, int classzone_idx) |
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{ |
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return COMPACT_SKIPPED; |
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} |
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static inline void defer_compaction(struct zone *zone, int order) |
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{ |
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} |
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static inline bool compaction_deferred(struct zone *zone, int order) |
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{ |
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return true; |
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} |
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#endif /* CONFIG_COMPACTION */ |
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#if defined(CONFIG_COMPACTION) && defined(CONFIG_SYSFS) && defined(CONFIG_NUMA) |
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extern int compaction_register_node(struct node *node); |
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extern void compaction_unregister_node(struct node *node); |
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#else |
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static inline int compaction_register_node(struct node *node) |
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{ |
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return 0; |
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} |
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static inline void compaction_unregister_node(struct node *node) |
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{ |
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} |
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#endif /* CONFIG_COMPACTION && CONFIG_SYSFS && CONFIG_NUMA */ |
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#endif /* _LINUX_COMPACTION_H */
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