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| author | Kaixu Xia <kaixuxia@tencent.com> | 2020-06-01 21:49:36 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-02 10:59:09 -0700 |
| commit | 1c4448edb71ab9da35a938244602cdd75809de2b (patch) | |
| tree | 5b7e28ed32baed94bbfaf3e86b4d6ca39d148cd9 | |
| parent | a6f5576bb195c3b7508e3e1c98d2dcf6691f96e8 (diff) | |
| download | linux-stable-1c4448edb71ab9da35a938244602cdd75809de2b.tar.gz | |
mm: memcontrol: simplify value comparison between count and limit
When the variables count and limit have the same value(count == limit),
the result of min(margin, limit - count) statement should be 0 and the
variable margin is set to 0. So in this case, the min() statement is
not necessary and we can directly set the variable margin to 0.
Signed-off-by: Kaixu Xia <kaixuxia@tencent.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Vladimir Davydov <vdavydov.dev@gmail.com>
Link: http://lkml.kernel.org/r/1587479661-27237-1-git-send-email-kaixuxia@tencent.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | mm/memcontrol.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/memcontrol.c b/mm/memcontrol.c index 4bb922c0252179..2243230befd256 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -1314,7 +1314,7 @@ static unsigned long mem_cgroup_margin(struct mem_cgroup *memcg) if (do_memsw_account()) { count = page_counter_read(&memcg->memsw); limit = READ_ONCE(memcg->memsw.max); - if (count <= limit) + if (count < limit) margin = min(margin, limit - count); else margin = 0; |