From: Boris Zhmurov <bb@kernelpanic.ru>
To: paulmck@linux.vnet.ibm.com
Cc: Michal Hocko <mhocko@kernel.org>,
Paul Menzel <pmenzel@molgen.mpg.de>,
Donald Buczek <buczek@molgen.mpg.de>,
linux-mm@kvack.org
Subject: Re: INFO: rcu_sched detected stalls on CPUs/tasks with `kswapd` and `mem_cgroup_shrink_node`
Date: Wed, 30 Nov 2016 20:41:20 +0300 [thread overview]
Message-ID: <66fd50e1-a922-846a-f427-7654795bd4b5@kernelpanic.ru> (raw)
In-Reply-To: <20161128150509.GG3924@linux.vnet.ibm.com>
Paul E. McKenney 28/11/16 18:05:
>>>> So Paul, I've dropped "mm: Prevent shrink_node_memcg() RCU CPU stall
>>>> warnings" patch, and stalls got back (attached).
>>>>
>>>> With this patch "commit 7cebc6b63bf75db48cb19a94564c39294fd40959" from
>>>> your tree stalls gone. Looks like that.
>>>
>>> So with only this commit and no other commit or configuration adjustment,
>>> everything works? Or it the solution this commit and some other stuff?
>>>
>>> The reason I ask is that if just this commit does the trick, I should
>>> drop the others.
>>
>> I'd like to ask for some more time to make sure this is it.
>> Approximately 2 or 3 days.
>
> Works for me!
Well, after some testing I may say, that your patch:
---------------------8<-----------------------------------
commit 7cebc6b63bf75db48cb19a94564c39294fd40959
Author: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Date: Fri Nov 25 12:48:10 2016 -0800
mm: Prevent shrink_node_memcg() RCU CPU stall warnings
---------------------8<-----------------------------------
fixes stall warning and dmesg is clean now.
--
Boris Zhmurov
System/Network Administrator
mailto: bb@kernelpanic.ru
"wget http://kernelpanic.ru/bb_public_key.pgp -O - | gpg --import"
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next prev parent reply other threads:[~2016-11-30 17:41 UTC|newest]
Thread overview: 94+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <d6981bac-8e97-b482-98c0-40949db03ca3@kernelpanic.ru>
[not found] ` <20161124133019.GE3612@linux.vnet.ibm.com>
[not found] ` <de88a72a-f861-b51f-9fb3-4265378702f1@kernelpanic.ru>
[not found] ` <20161125212000.GI31360@linux.vnet.ibm.com>
[not found] ` <20161128095825.GI14788@dhcp22.suse.cz>
[not found] ` <20161128105425.GY31360@linux.vnet.ibm.com>
[not found] ` <3a4242cb-0198-0a3b-97ae-536fb5ff83ec@kernelpanic.ru>
[not found] ` <20161128143435.GC3924@linux.vnet.ibm.com>
2016-11-28 14:40 ` INFO: rcu_sched detected stalls on CPUs/tasks with `kswapd` and `mem_cgroup_shrink_node` Boris Zhmurov
2016-11-28 15:05 ` Paul E. McKenney
2016-11-28 19:16 ` Boris Zhmurov
2016-11-29 18:59 ` Paul E. McKenney
2016-11-30 17:41 ` Boris Zhmurov [this message]
2016-11-30 17:48 ` Michal Hocko
2016-11-30 18:12 ` Boris Zhmurov
2016-11-30 18:25 ` Michal Hocko
2016-11-30 18:26 ` Boris Zhmurov
2016-12-01 18:10 ` Boris Zhmurov
2016-12-01 19:39 ` Paul E. McKenney
2016-12-01 19:39 ` Paul E. McKenney
2016-12-02 9:37 ` Michal Hocko
2016-12-02 9:37 ` Michal Hocko
2016-12-02 13:52 ` Paul E. McKenney
2016-12-02 13:52 ` Paul E. McKenney
2016-12-02 16:39 ` Boris Zhmurov
2016-12-02 16:39 ` Boris Zhmurov
2016-12-02 16:44 ` Paul E. McKenney
2016-12-02 16:44 ` Paul E. McKenney
2016-12-02 17:02 ` Michal Hocko
2016-12-02 17:02 ` Michal Hocko
2016-12-02 17:15 ` Paul E. McKenney
2016-12-02 17:15 ` Paul E. McKenney
2016-11-30 19:42 ` Paul E. McKenney
[not found] <24c226a5-1a4a-173e-8b4e-5107a2baac04@molgen.mpg.de>
2016-11-08 12:22 ` Paul Menzel
2016-11-08 17:03 ` Paul E. McKenney
2016-11-08 17:38 ` Paul Menzel
2016-11-08 18:39 ` Paul E. McKenney
2016-11-16 17:01 ` Paul Menzel
2016-11-16 17:30 ` Paul E. McKenney
2016-11-21 13:41 ` Michal Hocko
2016-11-21 14:01 ` Paul E. McKenney
2016-11-21 14:18 ` Michal Hocko
2016-11-21 14:29 ` Paul E. McKenney
2016-11-21 15:35 ` Donald Buczek
2016-11-24 10:15 ` Michal Hocko
2016-11-24 18:50 ` Donald Buczek
2016-11-27 9:37 ` Paul Menzel
2016-11-27 5:32 ` Christopher S. Aker
2016-11-27 9:19 ` Donald Buczek
2016-11-28 11:04 ` Michal Hocko
2016-11-28 12:26 ` Paul Menzel
2016-11-28 12:26 ` Paul Menzel
2016-11-30 10:28 ` Donald Buczek
2016-11-30 10:28 ` Donald Buczek
2016-11-30 11:09 ` Michal Hocko
2016-11-30 11:09 ` Michal Hocko
2016-11-30 11:43 ` Donald Buczek
2016-11-30 11:43 ` Donald Buczek
2016-12-02 9:14 ` Donald Buczek
2016-12-02 9:14 ` Donald Buczek
2016-12-06 8:32 ` Donald Buczek
2016-12-06 8:32 ` Donald Buczek
2016-11-30 11:53 ` Paul E. McKenney
2016-11-30 11:53 ` Paul E. McKenney
2016-11-30 11:54 ` Paul E. McKenney
2016-11-30 11:54 ` Paul E. McKenney
2016-11-30 12:31 ` Paul Menzel
2016-11-30 12:31 ` Paul Menzel
2016-11-30 14:31 ` Paul E. McKenney
2016-11-30 14:31 ` Paul E. McKenney
2016-11-30 13:19 ` Michal Hocko
2016-11-30 13:19 ` Michal Hocko
2016-11-30 14:29 ` Paul E. McKenney
2016-11-30 14:29 ` Paul E. McKenney
2016-11-30 16:38 ` Peter Zijlstra
2016-11-30 16:38 ` Peter Zijlstra
2016-11-30 17:02 ` Paul E. McKenney
2016-11-30 17:02 ` Paul E. McKenney
2016-11-30 17:05 ` Michal Hocko
2016-11-30 17:05 ` Michal Hocko
2016-11-30 17:23 ` Paul E. McKenney
2016-11-30 17:23 ` Paul E. McKenney
2016-11-30 17:34 ` Michal Hocko
2016-11-30 17:34 ` Michal Hocko
2016-11-30 17:50 ` Peter Zijlstra
2016-11-30 17:50 ` Peter Zijlstra
2016-11-30 19:40 ` Paul E. McKenney
2016-11-30 19:40 ` Paul E. McKenney
2016-12-01 5:30 ` Peter Zijlstra
2016-12-01 5:30 ` Peter Zijlstra
2016-12-01 12:40 ` Paul E. McKenney
2016-12-01 12:40 ` Paul E. McKenney
2016-12-01 16:36 ` Peter Zijlstra
2016-12-01 16:36 ` Peter Zijlstra
2016-12-01 16:59 ` Paul E. McKenney
2016-12-01 16:59 ` Paul E. McKenney
2016-12-01 18:09 ` Peter Zijlstra
2016-12-01 18:09 ` Peter Zijlstra
2016-12-01 18:42 ` Paul E. McKenney
2016-12-01 18:42 ` Paul E. McKenney
2016-12-01 18:49 ` Peter Zijlstra
2016-12-01 18:49 ` Peter Zijlstra
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