netdev - Re: [Patch net] net_sched: fix a missing rcu barrier in mini_qdisc_pair

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Message-ID: <20171222102352.GD11519@nanopsycho>
Date:   Fri, 22 Dec 2017 11:23:52 +0100
From:   Jiri Pirko <jiri@...nulli.us>
To:     Cong Wang <xiyou.wangcong@...il.com>
Cc:     Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Jiri Pirko <jiri@...lanox.com>,
        John Fastabend <john.fastabend@...il.com>
Subject: Re: [Patch net] net_sched: fix a missing rcu barrier in
 mini_qdisc_pair_swap()

Thu, Dec 21, 2017 at 08:01:35PM CET, xiyou.wangcong@...il.com wrote:
>On Thu, Dec 21, 2017 at 1:03 AM, Jiri Pirko <jiri@...nulli.us> wrote:
>> Thu, Dec 21, 2017 at 08:26:24AM CET, xiyou.wangcong@...il.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.