linux-kernel - Re: occasional kernel hang on shutdown

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Message-ID: <20151209132253.GB30912@dhcp22.suse.cz>
Date:	Wed, 9 Dec 2015 14:22:53 +0100
From:	Michal Hocko <mhocko@...nel.org>
To:	Norbert Preining <preining@...ic.at>
Cc:	linux-kernel@...r.kernel.org, Tejun Heo <tj@...nel.org>,
	cgroups mailinglist <cgroups@...r.kernel.org>
Subject: Re: occasional kernel hang on shutdown - kernel/cgroup_pids.c

[CCing Tejun]

Seems to be the same issue as reported here?
http://lkml.kernel.org/r/20151208145851.GJ9837@bark

On Tue 08-12-15 08:53:52, Norbert Preining wrote:
> Dear all
> 
> (please Cc)
> 
> running 4.4-rc4 (written as rc3+ but only the tag commit is missing),
> but I think also earlier in the rc releases, I occasionally see hangs
> on shutdown. Nothing works anymore, but this time at least there
> was some output on the console.
> 
> Manually copied from screen:
> 
> WARNING: CPU: 1 PID: 14 at kernel/cgroup_pids.c:97 pids_cancel.constrprop.8+0x2a
> Modules linked in: ....
> ...
> CPU: 1 PID: 14 Comm: ksoftirqd/1 Tainted: G O 4.4.0-rc3+
> Hardware name: Sony Corporation SVP1322A1J/VAIO, BIOS R2092V7 04/24/2015
> ...
> 
> Does that help in any way?
> 
> All the best
> 
> Norbert
> 
> (please Cc)
> 
> ------------------------------------------------------------------------
> PREINING, Norbert                               http://www.preining.info
> JAIST, Japan                                 TeX Live & Debian Developer
> GPG: 0x860CDC13   fp: F7D8 A928 26E3 16A1 9FA0  ACF0 6CAC A448 860C DC13
> ------------------------------------------------------------------------
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-- 
Michal Hocko
SUSE Labs
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