From 664dc2189dd4327dd94959f5167a263276af6b76 Mon Sep 17 00:00:00 2001
From: Dmitry Rokosov <ddrokosov@salutedevices.com>
Date: Thu, 23 Nov 2023 10:19:45 +0300
Subject: mm: memcg: add reminder comment for the memcg v2 events

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>
---
 mm/memcontrol.c | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'mm')

diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index b226090fd906..592572d4842e 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -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]));
-- 
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