linux-kernel - 4.9-rc7 known automount/mount namespace interaction issues?

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Message-ID: <CAGmahrT8W+jkBZbt-HjD1ZCGnSk_LbV6yznxpMUAn+HT_=eHdw@mail.gmail.com>
Date:   Thu, 1 Dec 2016 01:04:17 +0100
From:   Sverd Johnsen <sverd.johnsen@...glemail.com>
To:     linux-kernel@...r.kernel.org
Subject: 4.9-rc7 known automount/mount namespace interaction issues?

I just tried 4.9-rc7 (next-20161130) and had some issues.
unfortunately its hard to describe for me. basically umount (the
utility) is getting blocked during stat(2) on a autofs mountpoint in a
mount namespace in scenario that worked fine in previous kernels.