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selinux: Use kmem_cache for hashtab_node

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During random test as own device to check slub account,
we found some slack memory from hashtab_node(kmalloc-64).
By using kzalloc(), middle of test result like below:
allocated size 240768
request size 45144
slack size 195624
allocation count 3762

So, we want to use kmem_cache_zalloc() and that
can reduce memory size 52byte(slack size/alloc count) per each struct.

Signed-off-by: Kyeongdon Kim <kyeongdon.kim@lge.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>
This commit is contained in:
Kyeongdon Kim
2017-09-06 18:50:19 +09:00
committed by Paul Moore
parent 2bd6bf03f4
commit 7c620ece12
3 changed files with 23 additions and 2 deletions
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4
security/selinux/ss/hashtab.h
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@@ -84,4 +84,8 @@ int hashtab_map(struct hashtab *h,
/* Fill info with some hash table statistics */
void hashtab_stat(struct hashtab *h, struct hashtab_info *info);
/* Use kmem_cache for hashtab_node */
void hashtab_cache_init(void);
void hashtab_cache_destroy(void);
#endif /* _SS_HASHTAB_H */