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Message-Id: <20190410191321.9527-3-longman@redhat.com> Date: Wed, 10 Apr 2019 15:13:21 -0400 From: Waiman Long <longman@...hat.com> To: Tejun Heo <tj@...nel.org>, Li Zefan <lizefan@...wei.com>, Johannes Weiner <hannes@...xchg.org>, Jonathan Corbet <corbet@....net>, Michal Hocko <mhocko@...nel.org>, Vladimir Davydov <vdavydov.dev@...il.com> Cc: linux-kernel@...r.kernel.org, cgroups@...r.kernel.org, linux-doc@...r.kernel.org, linux-mm@...ck.org, Andrew Morton <akpm@...ux-foundation.org>, Roman Gushchin <guro@...com>, Shakeel Butt <shakeelb@...gle.com>, Kirill Tkhai <ktkhai@...tuozzo.com>, Aaron Lu <aaron.lu@...el.com>, Waiman Long <longman@...hat.com> Subject: [RFC PATCH 2/2] mm/memcontrol: Add a new MEMCG_SUBSET_HIGH event A new MEMCG_SUBSET_HIGH event is added to record the number of times subset.high value is exceeded. Signed-off-by: Waiman Long <longman@...hat.com> --- include/linux/memcontrol.h | 1 + mm/memcontrol.c | 6 +++++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/include/linux/memcontrol.h b/include/linux/memcontrol.h index 1baf3e4a9eeb..4498db61507a 100644 --- a/include/linux/memcontrol.h +++ b/include/linux/memcontrol.h @@ -52,6 +52,7 @@ enum memcg_memory_event { MEMCG_LOW, MEMCG_HIGH, MEMCG_MAX, + MEMCG_SUBSET_HIGH, MEMCG_OOM, MEMCG_OOM_KILL, MEMCG_SWAP_MAX, diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 7e52adea60d9..feba8b9c55b3 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -2150,8 +2150,10 @@ static void reclaim_high(struct mem_cgroup *memcg, /* * Try memory reclaim if subset_high is exceeded. */ - if (mtype && (memcg_page_state(memcg, mtype) > memcg->subset_high)) + if (mtype && (memcg_page_state(memcg, mtype) > memcg->subset_high)) { + memcg_memory_event(memcg, MEMCG_SUBSET_HIGH); try_to_free_mem_cgroup_pages(memcg, nr_pages, gfp_mask, true); + } do { if (page_counter_read(&memcg->memory) <= memcg->high) @@ -5603,6 +5605,8 @@ static int memory_events_show(struct seq_file *m, void *v) atomic_long_read(&memcg->memory_events[MEMCG_HIGH])); seq_printf(m, "max %lu\n", atomic_long_read(&memcg->memory_events[MEMCG_MAX])); + seq_printf(m, "subset_high %lu\n", + atomic_long_read(&memcg->memory_events[MEMCG_SUBSET_HIGH])); seq_printf(m, "oom %lu\n", atomic_long_read(&memcg->memory_events[MEMCG_OOM])); seq_printf(m, "oom_kill %lu\n", -- 2.18.1
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