[PATCH 5/6] memcg: optimize memcg_get_hierarchical_limit

Wanpeng Li
2012-06-23T06:19:23Z

From: Wanpeng Li <liwp@linux.vnet.ibm.com>

Optimize memcg_get_hierarchical_limit to save cpu cycle.

Signed-off-by: Wanpeng Li <liwp.linux@gmail.com>
---
mm/memcontrol.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index c821e36..1ca79e2 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3917,9 +3917,9 @@ static void memcg_get_hierarchical_limit(struct mem_cgroup *memcg,

min_limit = res_counter_read_u64(&memcg->res, RES_LIMIT);
min_memsw_limit = res_counter_read_u64(&memcg->memsw, RES_LIMIT);
- cgroup = memcg->css.cgroup;
if (!memcg->use_hierarchy)
goto out;
+ cgroup = memcg->css.cgroup;

while (cgroup->parent) {
cgroup = cgroup->parent;
--
1.7.9.5