From: Huangzhaoyang <huangzhaoyang@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Michal Hocko <mhocko@kernel.org>,
Vladimir Davydov <vdavydov.dev@gmail.com>,
Zhaoyang Huang <zhaoyang.huang@unisoc.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: [PATCH] mm: skip current when memcg reclaim
Date: Fri, 15 Oct 2021 14:15:29 +0800 [thread overview]
Message-ID: <1634278529-16983-1-git-send-email-huangzhaoyang@gmail.com> (raw)
From: Zhaoyang Huang <zhaoyang.huang@unisoc.com>
Sibling thread of the same process could refault the reclaimed pages
in the same time, which would be typical in None global reclaim and
introduce thrashing.
---
mm/vmscan.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/mm/vmscan.c b/mm/vmscan.c
index 5199b96..ebbdc37 100644
--- a/mm/vmscan.c
+++ b/mm/vmscan.c
@@ -2841,6 +2841,11 @@ static void shrink_node_memcgs(pg_data_t *pgdat, struct scan_control *sc)
sc->memcg_low_skipped = 1;
continue;
}
+ /*
+ * Don't bother current when its memcg is below low
+ */
+ if (get_mem_cgroup_from_mm(current->mm) == memcg)
+ continue;
memcg_memory_event(memcg, MEMCG_LOW);
}
--
1.9.1
next reply other threads:[~2021-10-15 6:15 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-15 6:15 Huangzhaoyang [this message]
2021-10-15 20:00 ` Andrew Morton
2021-10-16 2:28 ` Zhaoyang Huang
2021-10-16 2:58 ` Andrew Morton
2021-10-16 3:05 ` Matthew Wilcox
2021-10-16 8:17 ` Zhaoyang Huang
2021-10-18 8:23 ` Michal Hocko
2021-10-18 9:25 ` Zhaoyang Huang
2021-10-18 12:41 ` Michal Hocko
2021-10-19 7:11 ` Zhaoyang Huang
2021-10-19 9:09 ` Michal Hocko
2021-10-19 12:17 ` Zhaoyang Huang
2021-10-19 13:23 ` Michal Hocko
2021-10-20 7:33 ` Zhaoyang Huang
2021-10-20 8:55 ` Michal Hocko
2021-10-20 11:45 ` Zhaoyang Huang
2021-10-20 15:11 ` Michal Hocko
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