Root/mm/slab.h

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 */
15enum 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
24extern enum slab_state slab_state;
25
26/* The slab cache mutex protects the management structures during changes */
27extern struct mutex slab_mutex;
28extern struct list_head slab_caches;
29
30struct kmem_cache *__kmem_cache_create(const char *name, size_t size,
31    size_t align, unsigned long flags, void (*ctor)(void *));
32
33#endif
34

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