linux-kernel - Re: cgroup: avoid attaching a cgroup root to two different superblocks

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Message-ID: <20170416152441.GA27278@wtj.duckdns.org>
Date:   Mon, 17 Apr 2017 00:24:41 +0900
From:   Tejun Heo <tj@...nel.org>
To:     Andrei Vagin <avagin@...tuozzo.com>
Cc:     Li Zefan <lizefan@...wei.com>, dvyukov@...gle.com,
        LKML <linux-kernel@...r.kernel.org>,
        Cgroups <cgroups@...r.kernel.org>
Subject: Re: cgroup: avoid attaching a cgroup root to two different
 superblocks

On Fri, Apr 14, 2017 at 04:27:38PM -0700, Andrei Vagin wrote:
> Hello,
> 
> One of our CRIU tests hangs with this patch.
> 
> Steps to reproduce:
> curl -o cgroupns.c https://gist.githubusercontent.com/avagin/f87c8a8bd2a0de9afcc74976327786bc/raw/5843701ef3679f50dd2427cf57a80871082eb28c/gistfile1.txt
> gcc cgroupns.c -o cgroupns
> ./cgroupns
> ./cgroupns

Reverted the patch for now.  Let's try again later.

Thanks.

-- 
tejun