lkml.org 
[lkml]   [2012]   [Jun]   [18]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] mm/memcg: add unlikely to mercg->move_charge_at_immigrate
Date
From: Wanpeng Li <liwp@linux.vnet.ibm.com>

move_charge_at_immigrate feature is disabled by default. Charges
are moved only when you move mm->owner and it also add additional
overhead.

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 a9c3d01..795a00f 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -5316,7 +5316,7 @@ static int mem_cgroup_can_attach(struct cgroup *cgroup,
int ret = 0;
struct mem_cgroup *memcg = mem_cgroup_from_cont(cgroup);

- if (memcg->move_charge_at_immigrate) {
+ if (unlikely(memcg->move_charge_at_immigrate)) {
struct mm_struct *mm;
struct mem_cgroup *from = mem_cgroup_from_task(p);

--
1.7.9.5


\
 
 \ /
  Last update: 2012-06-18 16:02    [W:0.065 / U:0.308 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site