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mm: memcg: add reminder comment for the memcg v2 events

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To maintain the correct state, it is important to ensure that events for
the memory cgroup v2 are aligned with the sample cgroup codes.

Link: https://lkml.kernel.org/r/20231123071945.25811-4-ddrokosov@salutedevices.com
Signed-off-by: Dmitry Rokosov <ddrokosov@salutedevices.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Muchun Song <muchun.song@linux.dev>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Dmitry Rokosov 2023-11-23 10:19:45 +03:00 committed by Andrew Morton
parent becf652960
commit 664dc2189d
1 changed files with 4 additions and 0 deletions
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4
mm/memcontrol.c
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@ -6783,6 +6783,10 @@ static ssize_t memory_max_write(struct kernfs_open_file *of,
return nbytes;
}
/*
* Note: don't forget to update the 'samples/cgroup/memcg_event_listener'
* if any new events become available.
*/
static void __memory_events_show(struct seq_file *m, atomic_long_t *events)
{
seq_printf(m, "low %lu\n", atomic_long_read(&events[MEMCG_LOW]));