slab.h
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:3k
- /*
- * linux/mm/slab.h
- * Written by Mark Hemment, 1996.
- * (markhe@nextd.demon.co.uk)
- */
- #if !defined(_LINUX_SLAB_H)
- #define _LINUX_SLAB_H
- #if defined(__KERNEL__)
- typedef struct kmem_cache_s kmem_cache_t;
- #include <linux/mm.h>
- #include <linux/cache.h>
- /* flags for kmem_cache_alloc() */
- #define SLAB_NOFS GFP_NOFS
- #define SLAB_NOIO GFP_NOIO
- #define SLAB_NOHIGHIO GFP_NOHIGHIO
- #define SLAB_ATOMIC GFP_ATOMIC
- #define SLAB_USER GFP_USER
- #define SLAB_KERNEL GFP_KERNEL
- #define SLAB_NFS GFP_NFS
- #define SLAB_DMA GFP_DMA
- #define SLAB_LEVEL_MASK (__GFP_WAIT|__GFP_HIGH|__GFP_IO|__GFP_HIGHIO|__GFP_FS)
- #define SLAB_NO_GROW 0x00001000UL /* don't grow a cache */
- /* flags to pass to kmem_cache_create().
- * The first 3 are only valid when the allocator as been build
- * SLAB_DEBUG_SUPPORT.
- */
- #define SLAB_DEBUG_FREE 0x00000100UL /* Peform (expensive) checks on free */
- #define SLAB_DEBUG_INITIAL 0x00000200UL /* Call constructor (as verifier) */
- #define SLAB_RED_ZONE 0x00000400UL /* Red zone objs in a cache */
- #define SLAB_POISON 0x00000800UL /* Poison objects */
- #define SLAB_NO_REAP 0x00001000UL /* never reap from the cache */
- #define SLAB_HWCACHE_ALIGN 0x00002000UL /* align objs on a h/w cache lines */
- #define SLAB_CACHE_DMA 0x00004000UL /* use GFP_DMA memory */
- #define SLAB_MUST_HWCACHE_ALIGN 0x00008000UL /* force alignment */
- /* flags passed to a constructor func */
- #define SLAB_CTOR_CONSTRUCTOR 0x001UL /* if not set, then deconstructor */
- #define SLAB_CTOR_ATOMIC 0x002UL /* tell constructor it can't sleep */
- #define SLAB_CTOR_VERIFY 0x004UL /* tell constructor it's a verify call */
- /* prototypes */
- extern void kmem_cache_init(void);
- extern void kmem_cache_sizes_init(void);
- extern kmem_cache_t *kmem_find_general_cachep(size_t, int gfpflags);
- extern kmem_cache_t *kmem_cache_create(const char *, size_t, size_t, unsigned long,
- void (*)(void *, kmem_cache_t *, unsigned long),
- void (*)(void *, kmem_cache_t *, unsigned long));
- extern int kmem_cache_destroy(kmem_cache_t *);
- extern int kmem_cache_shrink(kmem_cache_t *);
- extern void *kmem_cache_alloc(kmem_cache_t *, int);
- extern void kmem_cache_free(kmem_cache_t *, void *);
- extern void *kmalloc(size_t, int);
- extern void kfree(const void *);
- extern int FASTCALL(kmem_cache_reap(int));
- extern int slabinfo_read_proc(char *page, char **start, off_t off,
- int count, int *eof, void *data);
- extern int slabinfo_write_proc(struct file *file, const char *buffer,
- unsigned long count, void *data);
- /* System wide caches */
- extern kmem_cache_t *vm_area_cachep;
- extern kmem_cache_t *mm_cachep;
- extern kmem_cache_t *names_cachep;
- extern kmem_cache_t *files_cachep;
- extern kmem_cache_t *filp_cachep;
- extern kmem_cache_t *dquot_cachep;
- extern kmem_cache_t *bh_cachep;
- extern kmem_cache_t *fs_cachep;
- extern kmem_cache_t *sigact_cachep;
- #endif /* __KERNEL__ */
- #endif /* _LINUX_SLAB_H */