projects / mirror_ubuntu-zesty-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 748446bb MG |
1 | #ifndef _LINUX_COMPACTION_H |
| 2 | #define _LINUX_COMPACTION_H | |
| 3 | ||
| 56de7263 MG |
4 | /* Return values for compact_zone() and try_to_compact_pages() */ |
| 5 | /* compaction didn't start as it was not possible or direct reclaim was more suitable */ | |
| 6 | #define COMPACT_SKIPPED 0 | |
| 7 | /* compaction should continue to another pageblock */ | |
| 8 | #define COMPACT_CONTINUE 1 | |
| 9 | /* direct compaction partially compacted a zone and there are suitable pages */ | |
| 10 | #define COMPACT_PARTIAL 2 | |
| 11 | /* The full zone was compacted */ | |
| 12 | #define COMPACT_COMPLETE 3 | |
| 748446bb | 13 | |
| 76ab0f53 MG |
14 | #ifdef CONFIG_COMPACTION |
| 15 | extern int sysctl_compact_memory; | |
| 16 | extern int sysctl_compaction_handler(struct ctl_table *table, int write, | |
| 17 | void __user *buffer, size_t *length, loff_t *ppos); | |
| 56de7263 MG |
18 | |
| 19 | extern int fragmentation_index(struct zone *zone, unsigned int order); | |
| 20 | extern unsigned long try_to_compact_pages(struct zonelist *zonelist, | |
| 21 | int order, gfp_t gfp_mask, nodemask_t *mask); | |
| 22 | #else | |
| 23 | static inline unsigned long try_to_compact_pages(struct zonelist *zonelist, | |
| 24 | int order, gfp_t gfp_mask, nodemask_t *nodemask) | |
| 25 | { | |
| 26 | return COMPACT_CONTINUE; | |
| 27 | } | |
| 28 | ||
| 76ab0f53 MG |
29 | #endif /* CONFIG_COMPACTION */ |
| 30 | ||
| ed4a6d7f MG |
31 | #if defined(CONFIG_COMPACTION) && defined(CONFIG_SYSFS) && defined(CONFIG_NUMA) |
| 32 | extern int compaction_register_node(struct node *node); | |
| 33 | extern void compaction_unregister_node(struct node *node); | |
| 34 | ||
| 35 | #else | |
| 36 | ||
| 37 | static inline int compaction_register_node(struct node *node) | |
| 38 | { | |
| 39 | return 0; | |
| 40 | } | |
| 41 | ||
| 42 | static inline void compaction_unregister_node(struct node *node) | |
| 43 | { | |
| 44 | } | |
| 45 | #endif /* CONFIG_COMPACTION && CONFIG_SYSFS && CONFIG_NUMA */ | |
| 46 | ||
| 748446bb | 47 | #endif /* _LINUX_COMPACTION_H */ |