[PATCH 3/5] mm, memcg: save some atomic ops when flush is already true
From: Miaohe Lin <linmiaohe@huawei.com>
Date: 2021-07-29 12:58:03
Also in:
linux-mm, lkml
Subsystem:
control group - memory resource controller (memcg), memory management, the rest · Maintainers:
Johannes Weiner, Michal Hocko, Roman Gushchin, Shakeel Butt, Andrew Morton, Linus Torvalds
Add 'else' to save some atomic ops in obj_stock_flush_required() when flush is already true. No functional change intended here. Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> --- mm/memcontrol.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index a03e24e57cd9..5b4592d1e0f2 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c@@ -2231,7 +2231,7 @@ static void drain_all_stock(struct mem_cgroup *root_memcg) if (memcg && stock->nr_pages && mem_cgroup_is_descendant(memcg, root_memcg)) flush = true; - if (obj_stock_flush_required(stock, root_memcg)) + else if (obj_stock_flush_required(stock, root_memcg)) flush = true; rcu_read_unlock();
--
2.23.0