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Date:   Thu, 3 Sep 2020 09:24:50 +0200
From:   Eric Dumazet <>
To:     Yunsheng Lin <>,
        Eric Dumazet <>,
        Cong Wang <>
Cc:     Jamal Hadi Salim <>, Jiri Pirko <>,
        David Miller <>,
        Jakub Kicinski <>,
        Linux Kernel Network Developers <>,
        LKML <>,
Subject: Re: [PATCH net-next] net: sch_generic: aviod concurrent reset and
 enqueue op for lockless qdisc

On 9/2/20 6:14 PM, Yunsheng Lin wrote:

> It seems semantics for some_qdisc_is_busy() is changed, which does not only do
> the checking, but also do the reseting?

Yes, obviously, we would have to rename to a better name.

> Also, qdisc_reset() could be called multi times for the same qdisc if some_qdisc_is_busy()
> return true multi times?

This should not matter, qdisc_reset() can be called multiple times,
as we also call it from qdisc_destroy() anyway.

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