slab的简单使用

#include <linux/module.h> #include <linux/init.h> #include <linux/kernel.h> #include <linux/slab.h> #include <linux/fs.h> #define CUTBAG_DIR "CU_T-bagwell" #define MAX_STRING_TEST 20 static struct kmem_cache *T_bagwell_slab_test; struct test{         int count;         unsigned char test_string[MAX_STRING_TEST]; }; struct test *test_for_cu; static int __init test_init(void) {         T_bagwell_slab_test = kmem_cache_create(CUTBAG_DIR,                         sizeof(struct test),                         0, SLAB_RECLAIM_ACCOUNT, NULL                         );         if(!T_bagwell_slab_test){                 printk(KERN_WARNING "kmem_cache_create faild\n");                 return -1;         }         test_for_cu = kmem_cache_alloc(T_bagwell_slab_test, GFP_KERNEL);         if(!test_for_cu){                 printk(KERN_WARNING "kmem_cache_alloc faild\n");                 kmem_cache_destroy(T_bagwell_slab_test);                 return -1;         }         memset(test_for_cu, 0 ,sizeof(struct test));         test_for_cu->count = 100;         memcpy(test_for_cu->test_string, "test_for_chinaunix", MAX_STRING_TEST);         return 0; } static void __exit test_cleanup(void) {         printk(KERN_WARNING "%s %d\n", test_for_cu->test_string, test_for_cu->count);         kmem_cache_free(T_bagwell_slab_test, test_for_cu);         kmem_cache_destroy(T_bagwell_slab_test); } module_init(test_init); module_exit(test_cleanup); MODULE_LICENSE("GPL");