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Subject[PATCH v9 11/20] mm/memcg: move SetPageLRU out of lru_lock in commit_charge
Date
Since lru lock doesn't defense PageLRU anymore, move the setting out of
lock may save a bit lock contention time.

Signed-off-by: Alex Shi <alex.shi@linux.alibaba.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: cgroups@vger.kernel.org
Cc: linux-mm@kvack.org
Cc: linux-kernel@vger.kernel.org
---
mm/memcontrol.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index f8419f3436a8..7d7b861a948c 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2614,9 +2614,9 @@ static void commit_charge(struct page *page, struct mem_cgroup *memcg,
lruvec = mem_cgroup_page_lruvec(page, pgdat);

VM_BUG_ON_PAGE(PageLRU(page), page);
- SetPageLRU(page);
add_page_to_lru_list(page, lruvec, page_lru(page));
spin_unlock_irq(&pgdat->lru_lock);
+ SetPageLRU(page);
}
}

--
1.8.3.1
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