Messages in this thread Patch in this message | | | From | Shakeel Butt <> | Subject | [PATCH] mm: memcontrol: drain memcg stock on force_empty | Date | Mon, 7 May 2018 13:16:51 -0700 |
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From: Junaid Shahid <junaids@google.com>
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.
Signed-off-by: Junaid Shahid <juanids@google.com> Signed-off-by: Shakeel Butt <shakeelb@google.com> --- mm/memcontrol.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index e2d33a37f971..2c3c69524b49 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2841,6 +2841,9 @@ static int mem_cgroup_force_empty(struct mem_cgroup *memcg) /* 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; -- 2.17.0.441.gb46fe60e1d-goog
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