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authorCasey Schaufler <cschaufler@localhost.localdomain>2019-04-02 21:37:12 +0300
committerCasey Schaufler <cschaufler@localhost.localdomain>2019-04-02 21:45:41 +0300
commit4e328b08882a68649df2c2b76fd208b0d0b85503 (patch)
tree1d11925b2e79b19646ff675a0d02bae725f4b21e /security/smack/smack.h
parent460d95a1d69d5c0352379a3651c9cb6ec09e4ddb (diff)
downloadlinux-4e328b08882a68649df2c2b76fd208b0d0b85503.tar.xz
Smack: Create smack_rule cache to optimize memory usage
This patch allows for small memory optimization by creating the kmem cache for "struct smack_rule" instead of using kzalloc. For adding new smack rule, kzalloc is used to allocate the memory for "struct smack_rule". kzalloc will always allocate 32 or 64 bytes for 1 structure depending upon the kzalloc cache sizes available in system. Although the size of structure is 20 bytes only, resulting in memory wastage per object in the default pool. For e.g., if there are 20000 rules, then it will save 240KB(20000*12) which is crucial for small memory targets. Signed-off-by: Vishal Goel <vishal.goel@samsung.com> Signed-off-by: Amit Sahrawat <a.sahrawat@samsung.com> Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Diffstat (limited to 'security/smack/smack.h')
-rw-r--r--security/smack/smack.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/security/smack/smack.h b/security/smack/smack.h
index cf52af77d15e..e41ca1d58484 100644
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
@@ -348,6 +348,7 @@ extern struct list_head smack_onlycap_list;
#define SMACK_HASH_SLOTS 16
extern struct hlist_head smack_known_hash[SMACK_HASH_SLOTS];
+extern struct kmem_cache *smack_rule_cache;
static inline struct task_smack *smack_cred(const struct cred *cred)
{