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/** Maximum wasted space we allow for cache */
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/** Maximum wasted space we allow for cache */
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#define SLAB_MAX_BADNESS(cache)   ((PAGE_SIZE << (cache)->order) >> 2)
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#define SLAB_MAX_BADNESS(cache)   ((PAGE_SIZE << (cache)->order) >> 2)
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/* slab_reclaim constants */
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/* slab_reclaim constants */
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#define SLAB_RECLAIM_ALL  0x1 /**< Reclaim all possible memory, because we are in memory stress */
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/** Reclaim all possible memory, because we are in memory stress */
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#define SLAB_RECLAIM_ALL  0x1
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/* cache_create flags */
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/* cache_create flags */
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/** Do not use per-cpu cache */
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#define SLAB_CACHE_NOMAGAZINE 0x1 /**< Do not use per-cpu cache */
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#define SLAB_CACHE_NOMAGAZINE 0x1
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#define SLAB_CACHE_SLINSIDE   0x2 /**< Have control structure inside SLAB */
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/** Have control structure inside SLAB */
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#define SLAB_CACHE_SLINSIDE   0x2
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/** We add magazine cache later, if we have this flag */
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#define SLAB_CACHE_MAGDEFERRED (0x4 | SLAB_CACHE_NOMAGAZINE) /**< We add magazine cache later, if we have this flag */
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#define SLAB_CACHE_MAGDEFERRED (0x4 | SLAB_CACHE_NOMAGAZINE)
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typedef struct {
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typedef struct {
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    link_t link;
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    link_t link;
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    count_t busy;  /**< Count of full slots in magazine */
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    count_t busy;  /**< Count of full slots in magazine */
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    count_t size;  /**< Number of slots in magazine */
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    count_t size;  /**< Number of slots in magazine */
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typedef struct {
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typedef struct {
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    char *name;
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    char *name;
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    link_t link;
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    link_t link;
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    /* Configuration */
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    /* Configuration */
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    size_t size;        /**< Size of slab position - align_up(sizeof(obj)) */
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    /** Size of slab position - align_up(sizeof(obj)) */
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    size_t size;
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    int (*constructor)(void *obj, int kmflag);
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    int (*constructor)(void *obj, int kmflag);
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    int (*destructor)(void *obj);
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    int (*destructor)(void *obj);
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    int flags;      /**< Flags changing behaviour of cache */
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    /** Flags changing behaviour of cache */
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    int flags;
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    /* Computed values */
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    /* Computed values */
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    uint8_t order;      /**< Order of frames to be allocated */
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    uint8_t order;      /**< Order of frames to be allocated */
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    int objects;        /**< Number of objects that fit in */
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    int objects;        /**< Number of objects that fit in */
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    /* Statistics */
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    /* Statistics */
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    atomic_t allocated_slabs;
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    atomic_t allocated_slabs;
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    atomic_t allocated_objs;
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    atomic_t allocated_objs;
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    atomic_t cached_objs;
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    atomic_t cached_objs;
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    atomic_t magazine_counter; /**< How many magazines in magazines list */
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    /** How many magazines in magazines list */
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    atomic_t magazine_counter;
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    /* Slabs */
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    /* Slabs */
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    link_t full_slabs;  /**< List of full slabs */
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    link_t full_slabs;  /**< List of full slabs */
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    link_t partial_slabs;   /**< List of partial slabs */
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    link_t partial_slabs;   /**< List of partial slabs */
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    SPINLOCK_DECLARE(slablock);
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    SPINLOCK_DECLARE(slablock);
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    /** CPU cache */
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    /** CPU cache */
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    slab_mag_cache_t *mag_cache;
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    slab_mag_cache_t *mag_cache;
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} slab_cache_t;
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} slab_cache_t;
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extern slab_cache_t * slab_cache_create(char *name,
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extern slab_cache_t * slab_cache_create(char *name, size_t size, size_t align,
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                    size_t size,
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                    size_t align,
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                    int (*constructor)(void *obj, int kmflag),
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    int (*constructor)(void *obj, int kmflag), int (*destructor)(void *obj),
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                    int (*destructor)(void *obj),
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                    int flags);
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    int flags);
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extern void slab_cache_destroy(slab_cache_t *cache);
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extern void slab_cache_destroy(slab_cache_t *cache);
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extern void * slab_alloc(slab_cache_t *cache, int flags);
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extern void * slab_alloc(slab_cache_t *cache, int flags);
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extern void slab_free(slab_cache_t *cache, void *obj);
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extern void slab_free(slab_cache_t *cache, void *obj);
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extern count_t slab_reclaim(int flags);
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extern count_t slab_reclaim(int flags);
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/** Initialize slab subsytem */
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/* slab subsytem initialization */
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extern void slab_cache_init(void);
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extern void slab_cache_init(void);
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extern void slab_enable_cpucache(void);
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extern void slab_enable_cpucache(void);
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/* kconsole debug */
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/* kconsole debug */
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extern void slab_print_list(void);
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extern void slab_print_list(void);