netdev - Re: [PATCH net-next 2/2] net: sched: remove one pair of atomic operations

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Message-ID: <87y26pguln.fsf@toke.dk>
Date:   Tue, 19 Oct 2021 12:46:44 +0200
From:   Toke Høiland-Jørgensen <toke@...hat.com>
To:     Eric Dumazet <eric.dumazet@...il.com>,
        "David S . Miller" <davem@...emloft.net>,
        Jakub Kicinski <kuba@...nel.org>
Cc:     netdev <netdev@...r.kernel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Eric Dumazet <eric.dumazet@...il.com>,
        "Ahmed S . Darwish" <a.darwish@...utronix.de>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Subject: Re: [PATCH net-next 2/2] net: sched: remove one pair of atomic
 operations

Eric Dumazet <eric.dumazet@...il.com> writes:

> From: Eric Dumazet <edumazet@...gle.com>
>
> __QDISC_STATE_RUNNING is only set/cleared from contexts owning qdisc lock.
>
> Thus we can use less expensive bit operations, as we were doing
> before commit f9eb8aea2a1e ("net_sched: transform qdisc running bit into a seqcount")
>
> Fixes: 29cbcd858283 ("net: sched: Remove Qdisc::running sequence counter")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: Ahmed S. Darwish <a.darwish@...utronix.de>
> Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>

Tested-by: Toke Høiland-Jørgensen <toke@...hat.com>