kernel部分数据结构列表一(内存管理)

/*
 * 内核中用page结构表示系统中每个物理页，结构位于linux/mm.h
*/

struct page {
        page_flags_t          flags;
        atomic_t              _count;
        atomic_t              _mapcount;
        unsigned long         private;
        struct address_space  *mapping;
        pgoff_t               index;
        struct list_head      lru;
        void                  *virtual;
};

/*
* 系统的页被划分为区,每个区用struct zone表示，定义在linux/mmzone.h
*/

struct zone {
        spinlock_t              lock;
        unsigned long           free_pages;
        unsigned long           pages_min;
        unsigned long           pages_low;
        unsigned long           pages_high;
        unsigned long           protection[MAX_NR_ZONES];
        spinlock_t              lru_lock;
        struct list_head        active_list;
        struct list_head        inactive_list;
        unsigned long           nr_scan_active;
        unsigned long           nr_scan_inactive;
        unsigned long           nr_active;
        unsigned long           nr_inactive;
        int                     all_unreclaimable;
        unsigned long           pages_scanned;
        int                     temp_priority;
        int                     prev_priority;
        struct free_area        free_area[MAX_ORDER];
        wait_queue_head_t       *wait_table;
        unsigned long           wait_table_size;
        unsigned long           wait_table_bits;
        struct per_cpu_pageset  pageset[NR_CPUS];
        struct pglist_data      *zone_pgdat;
        struct page             *zone_mem_map;
        unsigned long           zone_start_pfn;
        char                    *name;
        unsigned long           spanned_pages;
        unsigned long           present_pages;
};


/*
*slab描述符strcut slab用来描述每个slab
*/
struct slab {
        struct list_head  list;       /* 满,部分满或者空链表*/
        unsigned long     colouroff;  /* slab着色的偏移量 */
        void              *s_mem;     /* 在slab中的第一个对象 */
        unsigned int      inuse;      /* 已经分配的对象数 */
        kmem_bufctl_t     free;       /* 第一个空闲对象，假如有的话 */
};