In fast path, res_counter_charge() will success.
This annotation 'unlikely' works very well to make footprint shorter.
(And you can see the benefit of this by some benchmarks.)
Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Index: mmtom-2.6.27-rc5+/mm/memcontrol.c
===================================================================
--- mmtom-2.6.27-rc5+.orig/mm/memcontrol.c
+++ mmtom-2.6.27-rc5+/mm/memcontrol.c
@@ -683,7 +683,7 @@ static int mem_cgroup_charge_common(stru
css_get(&memcg->css);
}
- while (res_counter_charge(&mem->res, PAGE_SIZE)) {
+ while (unlikely(res_counter_charge(&mem->res, PAGE_SIZE))) {
if (!(gfp_mask & __GFP_WAIT))
goto out;
--
