From: Yafang Shao laoar.shao@gmail.com Subject: mm/memcontrol: fix wrong statistics in memory.stat

When we calculate total statistics for memcg1_stats and memcg1_events, we use the the index 'i' in the for loop as the events index. Actually we should use memcg1_stats[i] and memcg1_events[i] as the events index.

Link: http://lkml.kernel.org/r/1562116978-19539-1-git-send-email-laoar.shao@gmail.... Fixes: 42a300353577 ("mm: memcontrol: fix recursive statistics correctness & scalabilty"). Signed-off-by: Yafang Shao <laoar.shao@gmail.com Reviewed-by: Shakeel Butt shakeelb@google.com Cc: Michal Hocko mhocko@suse.com Cc: Johannes Weiner hannes@cmpxchg.org Cc: Yafang Shao shaoyafang@didiglobal.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

mm/memcontrol.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/mm/memcontrol.c~mm-memcontrol-fix-wrong-statistics-in-memorystat +++ a/mm/memcontrol.c @@ -3523,12 +3523,13 @@ static int memcg_stat_show(struct seq_fi if (memcg1_stats[i] == MEMCG_SWAP && !do_memsw_account()) continue; seq_printf(m, "total_%s %llu\n", memcg1_stat_names[i], - (u64)memcg_page_state(memcg, i) * PAGE_SIZE); + (u64)memcg_page_state(memcg, memcg1_stats[i]) * + PAGE_SIZE); }

for (i = 0; i < ARRAY_SIZE(memcg1_events); i++) seq_printf(m, "total_%s %llu\n", memcg1_event_names[i], - (u64)memcg_events(memcg, i)); + (u64)memcg_events(memcg, memcg1_events[i]));

for (i = 0; i < NR_LRU_LISTS; i++) seq_printf(m, "total_%s %llu\n", mem_cgroup_lru_names[i], _