From: dong <bauers@126.com>
To: Vladimir Davydov <vdavydov.dev@gmail.com>
Cc: Michal Hocko <mhocko@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
bugzilla-daemon@bugzilla.kernel.org, linux-mm@kvack.org,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re:Re: Re: [Bug 201699] New: kmemleak in memcg_create_kmem_cache
Date: Mon, 19 Nov 2018 19:56:53 +0800 (CST) [thread overview]
Message-ID: <6185b79c.9161.1672bd49ed1.Coremail.bauers@126.com> (raw)
In-Reply-To: <20181119083045.m5rhvbsze4h5l6jq@esperanza>
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Sorry, there's a leak indeed. The memory was leaking all the time and I tried to run command `echo 3 > /proc/sys/vm/drop_caches`, it didn't help.
But when I delete the log files which was created by the failed systemd service, the leak(cached) memory was released.
I suspect the leak is relevant to the inode objects.
At 2018-11-19 16:30:45, "Vladimir Davydov" <vdavydov.dev@gmail.com> wrote:
>On Sun, Nov 18, 2018 at 08:44:14AM +0800, dong wrote:
>> First of all,I can see memory leak when I run ‘free -g’ command.
>
>This doesn't mean there's a leak. The kernel may postpone freeing memory
>until there's memory pressure. In particular cgroup objects are not
>released until there are objects allocated from the corresponding kmem
>caches. Those objects may be inodes or dentries, which are freed lazily.
>Looks like restarting a service causes recreation of a memory cgroup and
>hence piling up dead cgroups. Try to drop caches.
>
>>So I enabled kmemleak. I got the messages above. When I run ‘cat
>>/sys/kernel/debug/kmemleak’, nothing came up. Instead, the ‘dmesg’
>>command show me the leak messages. So the messages is not the leak
>>reason？How can I detect the real memory leak？Thanks！
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next prev parent reply other threads:[~2018-11-19 11:57 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <bug-201699-27@https.bugzilla.kernel.org/>
2018-11-15 21:06 ` Andrew Morton
2018-11-16 2:23 ` dong
2018-11-16 3:04 ` dong
2018-11-16 3:37 ` dong
2018-11-16 17:50 ` Vladimir Davydov
2018-11-18 0:44 ` dong
2018-11-19 8:30 ` Vladimir Davydov
2018-11-19 10:24 ` Michal Hocko
2018-11-19 11:56 ` dong [this message]
2018-11-21 8:46 ` dong
2018-11-21 8:56 ` Vladimir Davydov
2018-11-21 9:06 ` dong
2018-11-21 9:10 ` Michal Hocko
2018-11-21 9:22 ` dong
2018-11-21 9:36 ` 段熊春
2018-11-21 16:27 ` Michal Hocko
2018-11-22 2:19 ` 段熊春
2018-11-22 7:32 ` Michal Hocko
2018-11-22 2:56 ` 段熊春
2018-11-22 7:34 ` Michal Hocko
2018-11-22 8:21 ` 段熊春
2018-11-23 6:54 ` 段熊春
2018-11-21 8:52 ` Re: " Vladimir Davydov
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