From: Muchun Song <songmuchun@bytedance.com>
To: hannes@cmpxchg.org, mhocko@kernel.org, vdavydov.dev@gmail.com,
akpm@linux-foundation.org
Cc: guro@fb.com, cai@lca.pw, cgroups@vger.kernel.org,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Muchun Song <songmuchun@bytedance.com>
Subject: [PATCH] mm: memcontrol: Fix do not put the css reference
Date: Sun, 14 Jun 2020 20:26:53 +0800 [thread overview]
Message-ID: <20200614122653.98829-1-songmuchun@bytedance.com> (raw)
We should put the css reference when memory allocation failed.
Fixes: f0a3a24b532d ("mm: memcg/slab: rework non-root kmem_cache lifecycle management")
Signed-off-by: Muchun Song <songmuchun@bytedance.com>
---
mm/memcontrol.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 0b38b6ad547d..2323d811ee8e 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -2772,8 +2772,10 @@ static void memcg_schedule_kmem_cache_create(struct mem_cgroup *memcg,
return;
cw = kmalloc(sizeof(*cw), GFP_NOWAIT | __GFP_NOWARN);
- if (!cw)
+ if (!cw) {
+ css_put(&memcg->css);
return;
+ }
cw->memcg = memcg;
cw->cachep = cachep;
--
2.11.0
next reply other threads:[~2020-06-14 12:27 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-14 12:26 Muchun Song [this message]
2020-06-14 17:22 ` Roman Gushchin
2020-06-15 11:50 ` Michal Hocko
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