Linux内存管理之slab分配器分析(续二)

 五：kmem_cache_create（）分析
我们以一个例子来跟踪分析一下slab的机制：
下面是一个测试模块的代码：
#include <linux/config.h>
#include <linux/module.h>
#include <linux/slab.h>
 
MODULE_LICENSE("GPL");
MODULE_AUTHOR("ericxiao <xgr178@163.com>");
MODULE_DESCRIPTION("slab test module");
 
static kmem_cache_t *test_cachep = NULL;
struct slab_test
{
       int val;
};
 
void fun_ctor(struct slab_test *object , kmem_cache_t *cachep , unsigned long flags )
{
                printk("in ctor fuction ...\n");
                object->val = 1;
}
 
void fun_dtor(struct slab_test *object , kmem_cache_t *cachep , unsigned long flags)
{
     printk("in dtor fuction ...\n");
     object -> val = 0;
}
 
static int __init init(void)
{
       struct slab_test *object = NULL;
       printk("slab test moudle init ... \n");
       test_cachep = kmem_cache_create("test_cachep",sizeof(struct slab_test),0,SLAB_HWCACHE_ALIGN, \
                    fun_ctor, fun_dtor);
       if(!test_cachep)
                        return;            
       object = kmem_cache_alloc( test_cachep, GFP_KERNEL );
       if(object)
       {
   &