From mboxrd@z Thu Jan  1 00:00:00 1970
From: Michal Hocko <mhocko-AlSwsSmVLrQ@public.gmane.org>
Subject: Re: ps stuck on cmdline reading
Date: Tue, 3 Feb 2015 20:40:36 +0100
Message-ID: <20150203194036.GA2490@dhcp22.suse.cz>
References: <20150121095808.GA18656@gandi.net>
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To: William Dauchy <william-M8Sm6a3kpgNeoWH0uzbU5w@public.gmane.org>
Cc: cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org

On Wed 21-01-15 10:58:08, William Dauchy wrote:
> Hello,
> 
> I am sometines triggering an issue on a v3.14.x (v3.14.18 here) where
> the `ps auxwwf` is stuck.
> The setup is several containers which own several process and with
> memory limit on each cgroup.
> A strace reveals the `ps` command is stuck on a read of a cmdline
> file. The concerned process itself is on a non-interruptible IO state.
> The ps command is executed in the global cgroup.

What does /proc/<ps pid>/stack say?

-- 
Michal Hocko
SUSE Labs