The patch titled
Subject: mm: memcontrol: drain memcg stock on force_empty
has been added to the -mm tree. Its filename is
mm-memcontrol-drain-memcg-stock-on-force_empty.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-memcontrol-drain-memcg-stock-on-force_empty.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-memcontrol-drain-memcg-stock-on-force_empty.patch
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------------------------------------------------------
From: Junaid Shahid <junaids@xxxxxxxxxx>
Subject: mm: memcontrol: drain memcg stock on force_empty
The per-cpu memcg stock can retain a charge of upto 32 pages. On a
machine with large number of cpus, this can amount to a decent amount of
memory. Additionally force_empty interface might be triggering unneeded
memcg reclaims.
Link: http://lkml.kernel.org/r/20180507201651.165879-1-shakeelb@xxxxxxxxxx
Signed-off-by: Junaid Shahid <junaids@xxxxxxxxxx>
Signed-off-by: Shakeel Butt <shakeelb@xxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Greg Thelen <gthelen@xxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memcontrol.c | 3 +++
1 file changed, 3 insertions(+)
diff -puN mm/memcontrol.c~mm-memcontrol-drain-memcg-stock-on-force_empty mm/memcontrol.c
--- a/mm/memcontrol.c~mm-memcontrol-drain-memcg-stock-on-force_empty
+++ a/mm/memcontrol.c
@@ -2615,6 +2615,9 @@ static int mem_cgroup_force_empty(struct
/* we call try-to-free pages for make this cgroup empty */
lru_add_drain_all();
+
+ drain_all_stock(memcg);
+
/* try to free all pages in this cgroup */
while (nr_retries && page_counter_read(&memcg->memory)) {
int progress;
_
Patches currently in -mm which might be from junaids@xxxxxxxxxx are
mm-memcontrol-drain-memcg-stock-on-force_empty.patch
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