4 * Internal slab definitions
8 * State of the slab allocator.
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.
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 */
24 extern enum slab_state slab_state;
26 /* The slab cache mutex protects the management structures during changes */
27 extern struct mutex slab_mutex;
29 /* The list of all slab caches on the system */
30 extern struct list_head slab_caches;
32 /* The slab cache that manages slab cache information */
33 extern struct kmem_cache *kmem_cache;
35 /* Functions provided by the slab allocators */
36 extern int __kmem_cache_create(struct kmem_cache *, unsigned long flags);
38 extern struct kmem_cache *create_kmalloc_cache(const char *name, size_t size,
40 extern void create_boot_cache(struct kmem_cache *, const char *name,
41 size_t size, unsigned long flags);
44 struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
45 size_t align, unsigned long flags, void (*ctor)(void *));
47 static inline struct kmem_cache *__kmem_cache_alias(const char *name, size_t size,
48 size_t align, unsigned long flags, void (*ctor)(void *))
53 /* Legal flag mask for kmem_cache_create(), for various configurations */
54 #define SLAB_CORE_FLAGS (SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA | SLAB_PANIC | \
55 SLAB_DESTROY_BY_RCU | SLAB_DEBUG_OBJECTS )
57 #if defined(CONFIG_DEBUG_SLAB)
58 #define SLAB_DEBUG_FLAGS (SLAB_RED_ZONE | SLAB_POISON | SLAB_STORE_USER)
59 #elif defined(CONFIG_SLUB_DEBUG)
60 #define SLAB_DEBUG_FLAGS (SLAB_RED_ZONE | SLAB_POISON | SLAB_STORE_USER | \
61 SLAB_TRACE | SLAB_DEBUG_FREE)
63 #define SLAB_DEBUG_FLAGS (0)
66 #if defined(CONFIG_SLAB)
67 #define SLAB_CACHE_FLAGS (SLAB_MEM_SPREAD | SLAB_NOLEAKTRACE | \
68 SLAB_RECLAIM_ACCOUNT | SLAB_TEMPORARY | SLAB_NOTRACK)
69 #elif defined(CONFIG_SLUB)
70 #define SLAB_CACHE_FLAGS (SLAB_NOLEAKTRACE | SLAB_RECLAIM_ACCOUNT | \
71 SLAB_TEMPORARY | SLAB_NOTRACK)
73 #define SLAB_CACHE_FLAGS (0)
76 #define CACHE_CREATE_MASK (SLAB_CORE_FLAGS | SLAB_DEBUG_FLAGS | SLAB_CACHE_FLAGS)
78 int __kmem_cache_shutdown(struct kmem_cache *);
84 unsigned long active_objs;
85 unsigned long num_objs;
86 unsigned long active_slabs;
87 unsigned long num_slabs;
88 unsigned long shared_avail;
90 unsigned int batchcount;
92 unsigned int objects_per_slab;
93 unsigned int cache_order;
96 void get_slabinfo(struct kmem_cache *s, struct slabinfo *sinfo);
97 void slabinfo_show_stats(struct seq_file *m, struct kmem_cache *s);
98 ssize_t slabinfo_write(struct file *file, const char __user *buffer,
99 size_t count, loff_t *ppos);