From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
To: Michal Hocko <mhocko@suse.com>
Cc: cgroups@vger.kernel.org, linux-mm@kvack.org,
"Andrew Morton" <akpm@linux-foundation.org>,
"Johannes Weiner" <hannes@cmpxchg.org>,
"Michal Koutný" <mkoutny@suse.com>,
"Peter Zijlstra" <peterz@infradead.org>,
"Thomas Gleixner" <tglx@linutronix.de>,
"Vladimir Davydov" <vdavydov.dev@gmail.com>,
"Waiman Long" <longman@redhat.com>,
"kernel test robot" <oliver.sang@intel.com>
Subject: [PATCH] mm/memcg: Add a comment regarding the release `obj'.
Date: Fri, 25 Feb 2022 16:15:07 +0100 [thread overview]
Message-ID: <Yhjye3LaBB8q55bg@linutronix.de> (raw)
In-Reply-To: <YhSyXbxaMcgBJJtT@dhcp22.suse.cz>
Please fold into
mm/memcg: Protect memcg_stock with a local_lock_t
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
mm/memcontrol.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/mm/memcontrol.c b/mm/memcontrol.c
index 7883e2f2af3e8..19d4f9297b0c6 100644
--- a/mm/memcontrol.c
+++ b/mm/memcontrol.c
@@ -3245,6 +3245,10 @@ static struct obj_cgroup *drain_obj_stock(struct memcg_stock_pcp *stock)
}
stock->cached_objcg = NULL;
+ /*
+ * The `old' objects needs to be released by the caller via
+ * obj_cgroup_put() outside of memcg_stock_pcp::stock_lock.
+ */
return old;
}
--
2.35.1
next prev parent reply other threads:[~2022-02-25 15:15 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-21 18:25 [PATCH v4 0/6] mm/memcg: Address PREEMPT_RT problems instead of disabling it Sebastian Andrzej Siewior
2022-02-21 18:25 ` [PATCH v4 1/6] mm/memcg: Revert ("mm/memcg: optimize user context object stock access") Sebastian Andrzej Siewior
2022-02-21 18:25 ` [PATCH v4 2/6] mm/memcg: Disable threshold event handlers on PREEMPT_RT Sebastian Andrzej Siewior
2022-02-21 18:25 ` [PATCH v4 3/6] mm/memcg: Protect per-CPU counter by disabling preemption on PREEMPT_RT where needed Sebastian Andrzej Siewior
2022-02-22 5:41 ` Shakeel Butt
2022-02-25 15:17 ` [PATCH] mm/memcg: Add missing counter index which are not update in interrupt Sebastian Andrzej Siewior
2022-02-25 17:08 ` Shakeel Butt
2022-02-25 23:01 ` [PATCH] mm/memcg: Only perform the debug checks on !PREEMPT_RT Sebastian Andrzej Siewior
2022-02-26 0:05 ` Andrew Morton
2022-02-21 18:25 ` [PATCH v4 4/6] mm/memcg: Opencode the inner part of obj_cgroup_uncharge_pages() in drain_obj_stock() Sebastian Andrzej Siewior
2022-02-21 18:25 ` [PATCH v4 5/6] mm/memcg: Protect memcg_stock with a local_lock_t Sebastian Andrzej Siewior
2022-02-22 9:52 ` Michal Hocko
2022-02-25 15:15 ` Sebastian Andrzej Siewior [this message]
2022-02-21 18:25 ` [PATCH v4 6/6] mm/memcg: Disable migration instead of preemption in drain_all_stock() Sebastian Andrzej Siewior
2022-02-22 9:56 ` Michal Hocko
2022-02-25 20:13 ` [PATCH v5 " Sebastian Andrzej Siewior
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