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Message-ID: <20180130225227.GC3503@localhost.localdomain>
Date:   Tue, 30 Jan 2018 20:52:27 -0200
From:   Marcelo Ricardo Leitner <marcelo.leitner@...il.com>
To:     Tommi Rantala <tommi.t.rantala@...ia.com>
Cc:     Vlad Yasevich <vyasevich@...il.com>,
        Neil Horman <nhorman@...driver.com>,
        linux-sctp@...r.kernel.org,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: Re: sctp netns "unregister_netdevice: waiting for lo to become free.
 Usage count = 1"

On Mon, Jan 29, 2018 at 05:55:45PM +0200, Tommi Rantala wrote:
> Hi,
> 
> When running sctp_test from lksctp-tools in netns in 4.4 and 4.9 with
> suitable arguments, the local loopback device in the netns is not getting
> destroyed after deleting the netns.
> 
...
> 
> Based on a quick test, 4.14 and 4.15 does not suffer from this, but its
> reproducible e.g. in 4.4.113 and 4.9.75
> 
> Any ideas?

By the versions you mentioned and report, maybe f186ce61bb82 ("Fix an
intermittent pr_emerg warning about lo becoming free.") fixed it.

  Marcelo

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