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mm: memcg: remove redundant seq_buf_has_overflowed()

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Both the end of memory_stat_format() and memcg_stat_format() will call
WARN_ON_ONCE(seq_buf_has_overflowed()).  However, memory_stat_format() is
the only caller of memcg_stat_format(), when memcg is on the default
hierarchy, seq_buf_has_overflowed() will be executed twice, so remove the
redundant one.

Link: https://lkml.kernel.org/r/20240626094232.2432891-1-xiujianfeng@huawei.com
Signed-off-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Xiu Jianfeng 2024-06-26 09:42:32 +00:00 committed by Andrew Morton
parent a591d35c40
commit 1c46cc0989
1 changed files with 0 additions and 3 deletions
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3
mm/memcontrol.c
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@ -1476,9 +1476,6 @@ static void memcg_stat_format(struct mem_cgroup *memcg, struct seq_buf *s)
vm_event_name(memcg_vm_event_stat[i]),
memcg_events(memcg, memcg_vm_event_stat[i]));
}
/* The above should easily fit into one page */
WARN_ON_ONCE(seq_buf_has_overflowed(s));
}
static void memory_stat_format(struct mem_cgroup *memcg, struct seq_buf *s)