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1 | #ifndef MM_SLAB_H | |
2 | #define MM_SLAB_H | |
3 | /* | |
4 | * Internal slab definitions | |
5 | */ | |
6 | ||
7 | /* | |
8 | * State of the slab allocator. | |
9 | * | |
10 | * This is used to describe the states of the allocator during bootup. | |
11 | * Allocators use this to gradually bootstrap themselves. Most allocators | |
12 | * have the problem that the structures used for managing slab caches are | |
13 | * allocated from slab caches themselves. | |
14 | */ | |
15 | enum slab_state { | |
16 | DOWN, /* No slab functionality yet */ | |
17 | PARTIAL, /* SLUB: kmem_cache_node available */ | |
18 | PARTIAL_ARRAYCACHE, /* SLAB: kmalloc size for arraycache available */ | |
19 | PARTIAL_L3, /* SLAB: kmalloc size for l3 struct available */ | |
20 | UP, /* Slab caches usable but not all extras yet */ | |
21 | FULL /* Everything is working */ | |
22 | }; | |
23 | ||
24 | extern enum slab_state slab_state; | |
25 | ||
26 | /* The slab cache mutex protects the management structures during changes */ | |
27 | extern struct mutex slab_mutex; | |
28 | ||
29 | /* The list of all slab caches on the system */ | |
30 | extern struct list_head slab_caches; | |
31 | ||
32 | /* The slab cache that manages slab cache information */ | |
33 | extern struct kmem_cache *kmem_cache; | |
34 | ||
35 | /* Functions provided by the slab allocators */ | |
36 | extern int __kmem_cache_create(struct kmem_cache *, unsigned long flags); | |
37 | ||
38 | #ifdef CONFIG_SLUB | |
39 | struct kmem_cache *__kmem_cache_alias(const char *name, size_t size, | |
40 | size_t align, unsigned long flags, void (*ctor)(void *)); | |
41 | #else | |
42 | static inline struct kmem_cache *__kmem_cache_alias(const char *name, size_t size, | |
43 | size_t align, unsigned long flags, void (*ctor)(void *)) | |
44 | { return NULL; } | |
45 | #endif | |
46 | ||
47 | ||
48 | int __kmem_cache_shutdown(struct kmem_cache *); | |
49 | ||
50 | struct seq_file; | |
51 | struct file; | |
52 | ||
53 | struct slabinfo { | |
54 | unsigned long active_objs; | |
55 | unsigned long num_objs; | |
56 | unsigned long active_slabs; | |
57 | unsigned long num_slabs; | |
58 | unsigned long shared_avail; | |
59 | unsigned int limit; | |
60 | unsigned int batchcount; | |
61 | unsigned int shared; | |
62 | unsigned int objects_per_slab; | |
63 | unsigned int cache_order; | |
64 | }; | |
65 | ||
66 | void get_slabinfo(struct kmem_cache *s, struct slabinfo *sinfo); | |
67 | void slabinfo_show_stats(struct seq_file *m, struct kmem_cache *s); | |
68 | ssize_t slabinfo_write(struct file *file, const char __user *buffer, | |
69 | size_t count, loff_t *ppos); | |
70 | #endif |