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1: SlabÖÐʹÓõÄÒ³Ã涼»á¼ÓÉÏ“PG_slab”±êÖ¾£¬ÒÔ¸úÒ»°ãµÄÒ³ÃæÇø±ð¡£ÁíÍ⣬ÔÚÊÍ·ÅÄÚ´æµÄʱºò£¬¾­³£ÐèÒªÓõ½´ÓÒ³Ãæµ½slabµÄ¶ÔӦת»»¹Øϵ¡£ÄÇÊÇÔõÑù±êʶµÄÄØ£¿
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static void *kmem_getpages(kmem_cache_t *cachep, int flags, int nodeid)
{
     ……
     while (i--) {
         //Ϊ·ÖµÃµÄÿһ¸öÒ³ÃæÉèÖÃPG_slab±êÖ¾
         SetPageSlab(page);
         page++;
     }
……
}
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static int cache_grow (kmem_cache_t * cachep, int flags)
{
     ……
     //ÇëÇóÄÚ´æ¹ýºó£¬ÉèÖÃÄÚ´æÊôÐÔ
set_slab_attr(cachep, slabp, objp);
……
}
static void set_slab_attr(kmem_cache_t *cachep, struct slab *slabp, void *objp)
{
     int i;
     struct page *page;
     //¼ÆËãÒ³Ãæ×ÜÊý
     i = 1 << cachep->gfporder;
     //ÐéÄâµØַת»»³ÉÏàÓ¦Ò³Ãæ
     page = virt_to_page(objp);
     do {
         // #define    SET_PAGE_CACHE(pg,x)  ((pg)->lru.next = (struct list_head *)(x))
         SET_PAGE_CACHE(page, cachep);
         #define  SET_PAGE_SLAB(pg,x)   ((pg)->lru.prev = (struct list_head *)(x))
         SET_PAGE_SLAB(page, slabp);
         page++;
     } while (--i);
}
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