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97d06609 CL |
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 | ||
18004c5d CL |
26 | /* The slab cache mutex protects the management structures during changes */ |
27 | extern struct mutex slab_mutex; | |
9b030cb8 CL |
28 | |
29 | /* The list of all slab caches on the system */ | |
18004c5d CL |
30 | extern struct list_head slab_caches; |
31 | ||
9b030cb8 CL |
32 | /* The slab cache that manages slab cache information */ |
33 | extern struct kmem_cache *kmem_cache; | |
34 | ||
45906855 CL |
35 | unsigned long calculate_alignment(unsigned long flags, |
36 | unsigned long align, unsigned long size); | |
37 | ||
9b030cb8 | 38 | /* Functions provided by the slab allocators */ |
8a13a4cc | 39 | extern int __kmem_cache_create(struct kmem_cache *, unsigned long flags); |
97d06609 | 40 | |
45530c44 CL |
41 | extern struct kmem_cache *create_kmalloc_cache(const char *name, size_t size, |
42 | unsigned long flags); | |
43 | extern void create_boot_cache(struct kmem_cache *, const char *name, | |
44 | size_t size, unsigned long flags); | |
45 | ||
cbb79694 CL |
46 | #ifdef CONFIG_SLUB |
47 | struct kmem_cache *__kmem_cache_alias(const char *name, size_t size, | |
48 | size_t align, unsigned long flags, void (*ctor)(void *)); | |
49 | #else | |
50 | static inline struct kmem_cache *__kmem_cache_alias(const char *name, size_t size, | |
51 | size_t align, unsigned long flags, void (*ctor)(void *)) | |
52 | { return NULL; } | |
53 | #endif | |
54 | ||
55 | ||
d8843922 GC |
56 | /* Legal flag mask for kmem_cache_create(), for various configurations */ |
57 | #define SLAB_CORE_FLAGS (SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA | SLAB_PANIC | \ | |
58 | SLAB_DESTROY_BY_RCU | SLAB_DEBUG_OBJECTS ) | |
59 | ||
60 | #if defined(CONFIG_DEBUG_SLAB) | |
61 | #define SLAB_DEBUG_FLAGS (SLAB_RED_ZONE | SLAB_POISON | SLAB_STORE_USER) | |
62 | #elif defined(CONFIG_SLUB_DEBUG) | |
63 | #define SLAB_DEBUG_FLAGS (SLAB_RED_ZONE | SLAB_POISON | SLAB_STORE_USER | \ | |
64 | SLAB_TRACE | SLAB_DEBUG_FREE) | |
65 | #else | |
66 | #define SLAB_DEBUG_FLAGS (0) | |
67 | #endif | |
68 | ||
69 | #if defined(CONFIG_SLAB) | |
70 | #define SLAB_CACHE_FLAGS (SLAB_MEM_SPREAD | SLAB_NOLEAKTRACE | \ | |
71 | SLAB_RECLAIM_ACCOUNT | SLAB_TEMPORARY | SLAB_NOTRACK) | |
72 | #elif defined(CONFIG_SLUB) | |
73 | #define SLAB_CACHE_FLAGS (SLAB_NOLEAKTRACE | SLAB_RECLAIM_ACCOUNT | \ | |
74 | SLAB_TEMPORARY | SLAB_NOTRACK) | |
75 | #else | |
76 | #define SLAB_CACHE_FLAGS (0) | |
77 | #endif | |
78 | ||
79 | #define CACHE_CREATE_MASK (SLAB_CORE_FLAGS | SLAB_DEBUG_FLAGS | SLAB_CACHE_FLAGS) | |
80 | ||
945cf2b6 | 81 | int __kmem_cache_shutdown(struct kmem_cache *); |
945cf2b6 | 82 | |
b7454ad3 GC |
83 | struct seq_file; |
84 | struct file; | |
b7454ad3 | 85 | |
0d7561c6 GC |
86 | struct slabinfo { |
87 | unsigned long active_objs; | |
88 | unsigned long num_objs; | |
89 | unsigned long active_slabs; | |
90 | unsigned long num_slabs; | |
91 | unsigned long shared_avail; | |
92 | unsigned int limit; | |
93 | unsigned int batchcount; | |
94 | unsigned int shared; | |
95 | unsigned int objects_per_slab; | |
96 | unsigned int cache_order; | |
97 | }; | |
98 | ||
99 | void get_slabinfo(struct kmem_cache *s, struct slabinfo *sinfo); | |
100 | void slabinfo_show_stats(struct seq_file *m, struct kmem_cache *s); | |
b7454ad3 GC |
101 | ssize_t slabinfo_write(struct file *file, const char __user *buffer, |
102 | size_t count, loff_t *ppos); | |
ba6c496e GC |
103 | |
104 | #ifdef CONFIG_MEMCG_KMEM | |
105 | static inline bool is_root_cache(struct kmem_cache *s) | |
106 | { | |
107 | return !s->memcg_params || s->memcg_params->is_root_cache; | |
108 | } | |
109 | #else | |
110 | static inline bool is_root_cache(struct kmem_cache *s) | |
111 | { | |
112 | return true; | |
113 | } | |
114 | ||
115 | #endif | |
97d06609 | 116 | #endif |