netdev - Re: [PATCH net-next 1/1] pkt_sched: Remove useless qdisc_stab

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Message-ID: <CAM_iQpVXMYg_ep8EvEXvRu6HbEdEydy8wZ-6_OQ=JMzWEVR-kA@mail.gmail.com>
Date:   Fri, 17 Feb 2017 10:02:30 -0800
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     fgao@...ai8.com
Cc:     David Miller <davem@...emloft.net>,
        Jamal Hadi Salim <jhs@...atatu.com>,
        Linux Kernel Network Developers <netdev@...r.kernel.org>,
        Feng Gao <gfree.wind@...il.com>
Subject: Re: [PATCH net-next 1/1] pkt_sched: Remove useless qdisc_stab_lock

On Thu, Feb 16, 2017 at 10:34 PM,  <fgao@...ai8.com> wrote:
> From: Gao Feng <fgao@...ai8.com>
>
> The qdisc_stab_lock is used in qdisc_get_stab and qdisc_put_stab.
> These two functions are invoked in qdisc_create, qdisc_change, and
> qdisc_destroy which run fully under RTNL.
>
> So it already makes sure only one could access the qdisc_stab_list at
> the same time. Then it is unnecessary to use qdisc_stab_lock now.

I posted a (almost) same patch two years ago:
http://marc.info/?l=linux-netdev&m=141512383516640&w=2

Forget why it was not accepted at that time.