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LinuxÄÚ´æ¹ÜÀíÖ®slab·ÖÅäÆ÷·ÖÎö(ÐøÎå)

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1: SlabÖÐʹÓõÄÒ³Ãæ¶¼»á¼ÓÉÏ“PG_slab”±êÖ¾£¬ÒÔ¸úÒ»°ãµÄÒ³ÃæÇø±ð¡£ÁíÍ⣬ÔÚÊÍ·ÅÄÚ´æµÄʱºò£¬¾­³£ÐèÒªÓõ½´ÓÒ³Ãæµ½slabµÄ¶ÔӦת»»¹ØÏµ¡£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++;
     }
……
}
¹ØÓÚ´ÓÒ³Ãæµ½slabµÄת»»£º
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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;
     //ÐéÄâµØÖ·×ª»»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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²é¿´µ±Ç°µÇ¼Óû§:
node8:/home # who
root     :0           2009-11-04 16:26
root     pts/0       &n ......

LinuxϵÄʵʱÁ÷ýÌå±à³Ì

 
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µÄ¼¼Êõ»ù´¡¡£RTPÊǽøÐÐʵʱÁ÷ýÌå´«ÊäµÄ±ê׼ЭÒéº ......

Linux Shell

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LinuxÄÚ´æ¹ÜÀíÖ®slab·ÖÅäÆ÷·ÖÎö(Ðø¶þ)

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#include <linux/config.h>
#include <linux/module.h>
#include <linux/slab.h>
 
MODULE_LICENSE("GPL");
MODULE_AUTHOR("ericxiao <xgr178@163.com>");
MODULE_DESCRI ......

LinuxÄÚ´æ¹ÜÀíÖ®slab·ÖÅäÆ÷·ÖÎö(ÐøÈý)

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void * kmem_cache_alloc (kmem_cache_t *cachep, int flags)
{
     return __cache_alloc(cachep, flags);
}
ʵ¼ÊÉÏ»áµ÷ÓÃ__cache_allo ......
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