linux-kernel - Re: [REVIEW][PATCH] mount: In propagate_umount handle overlapping mount propagation trees

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Message-ID: <87pomtec6c.fsf@xmission.com>
Date:   Fri, 21 Oct 2016 14:26:19 -0500
From:   ebiederm@...ssion.com (Eric W. Biederman)
To:     Andrei Vagin <avagin@...tuozzo.com>
Cc:     Andrey Vagin <avagin@...nvz.org>,
        Alexander Viro <viro@...iv.linux.org.uk>,
        Linux Containers <containers@...ts.linux-foundation.org>,
        linux-fsdevel <linux-fsdevel@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [REVIEW][PATCH] mount: In propagate_umount handle overlapping mount propagation trees

Andrei Vagin <avagin@...tuozzo.com> writes:
>> Barring some stupid mistake this looks like it fixes both the performance
>> and the correctness issues I was able to spot earlier.  Andrei if you
>> could give this version a look over I would appreciate it.
>
> Eric, could you try out this script:
[snip script]

> It hangs up on my host with this patch.

Ugh.  I am seeing the hang as well digging into it.

Thanks for keeping me honest.

Eric