From mboxrd@z Thu Jan  1 00:00:00 1970
From: Jiri Pirko <jiri@resnulli.us>
Subject: Re: [Patch net] net_sched: fix a missing rcu barrier in
 mini_qdisc_pair_swap()
Date: Fri, 22 Dec 2017 11:23:52 +0100
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 <20171221090313.GB1930@nanopsycho>
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Cc: Linux Kernel Network Developers <netdev@vger.kernel.org>,
        Jiri Pirko <jiri@mellanox.com>,
        John Fastabend <john.fastabend@gmail.com>
To: Cong Wang <xiyou.wangcong@gmail.com>
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Thu, Dec 21, 2017 at 08:01:35PM CET, xiyou.wangcong@gmail.com wrote:
>On Thu, Dec 21, 2017 at 1:03 AM, Jiri Pirko <jiri@resnulli.us> wrote:
>> Thu, Dec 21, 2017 at 08:26:24AM CET, xiyou.wangcong@gmail.com wrote:

[...]

>
>
>Seriously? It is this call_rcu still flying after we free the qdisc.
>Did you seriously look into the stack trace from Jakub?

Got it now. You are right. Thank you for politely helping me to get out
of my confusion.