diff options
| author | Roman Gushchin <guro@fb.com> | 2021-03-30 18:19:09 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-07 12:47:03 +0200 |
| commit | 6f599379fd3a9a9ea4eb10f4f8e7dc74cf2ec249 (patch) | |
| tree | bcdf582a08cce84af3b7a86e3306f7ccfea320a3 /mm | |
| parent | ad6e2898e66e324ed6d386d6a29b0e9a9103670c (diff) | |
mm: fix oom_kill event handling
commit fe6bdfc8e1e131720abbe77a2eb990c94c9024cb upstream.
Commit e27be240df53 ("mm: memcg: make sure memory.events is uptodate
when waking pollers") converted most of memcg event counters to
per-memcg atomics, which made them less confusing for a user. The
"oom_kill" counter remained untouched, so now it behaves differently
than other counters (including "oom"). This adds nothing but confusion.
Let's fix this by adding the MEMCG_OOM_KILL event, and follow the
MEMCG_OOM approach.
This also removes a hack from count_memcg_event_mm(), introduced earlier
specially for the OOM_KILL counter.
[akpm@linux-foundation.org: fix for droppage of memcg-replace-mm-owner-with-mm-memcg.patch]
Link: http://lkml.kernel.org/r/20180508124637.29984-1-guro@fb.com
Signed-off-by: Roman Gushchin <guro@fb.com>
Acked-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru>
Acked-by: Johannes Weiner <hannes@cmpxchg.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[fllinden@amazon.com: backport to 4.14, minor contextual changes]
Signed-off-by: Frank van der Linden <fllinden@amazon.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/memcontrol.c | 6 | ||||
| -rw-r--r-- | mm/oom_kill.c | 2 |
2 files changed, 5 insertions, 3 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 31972189a827..ef6d996a920a 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3648,7 +3648,8 @@ static int mem_cgroup_oom_control_read(struct seq_file *sf, void *v) seq_printf(sf, "oom_kill_disable %d\n", memcg->oom_kill_disable); seq_printf(sf, "under_oom %d\n", (bool)memcg->under_oom); - seq_printf(sf, "oom_kill %lu\n", memcg_sum_events(memcg, OOM_KILL)); + seq_printf(sf, "oom_kill %lu\n", + atomic_long_read(&memcg->memory_events[MEMCG_OOM_KILL])); return 0; } @@ -5320,7 +5321,8 @@ static int memory_events_show(struct seq_file *m, void *v) atomic_long_read(&memcg->memory_events[MEMCG_MAX])); seq_printf(m, "oom %lu\n", atomic_long_read(&memcg->memory_events[MEMCG_OOM])); - seq_printf(m, "oom_kill %lu\n", memcg_sum_events(memcg, OOM_KILL)); + seq_printf(m, "oom_kill %lu\n", + atomic_long_read(&memcg->memory_events[MEMCG_OOM_KILL])); return 0; } diff --git a/mm/oom_kill.c b/mm/oom_kill.c index 6482d743c5c8..6f1bed211122 100644 --- a/mm/oom_kill.c +++ b/mm/oom_kill.c @@ -917,7 +917,7 @@ static void oom_kill_process(struct oom_control *oc, const char *message) /* Raise event before sending signal: task reaper must see this */ count_vm_event(OOM_KILL); - count_memcg_event_mm(mm, OOM_KILL); + memcg_memory_event_mm(mm, MEMCG_OOM_KILL); /* * We should send SIGKILL before granting access to memory reserves |