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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 | ||
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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 */ |