netdev - Re: [PATCH net] net_sched: fix pfifo_head

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Message-ID: <CAM_iQpXzZRwkYexMUAeAQVncFrSBW1UM07+P6grzP3kX04ut_Q@mail.gmail.com>
Date:	Sun, 12 Jun 2016 20:48:00 -0700
From:	Cong Wang <xiyou.wangcong@...il.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	David Miller <davem@...emloft.net>,
	netdev <netdev@...r.kernel.org>,
	Jamal Hadi Salim <jhs@...atatu.com>
Subject: Re: [PATCH net] net_sched: fix pfifo_head_drop behavior vs backlog

On Sun, Jun 12, 2016 at 8:01 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> From: Eric Dumazet <edumazet@...gle.com>
>
> When the qdisc is full, we drop a packet at the head of the queue,
> queue the current skb and return NET_XMIT_CN
>
> Now we track backlog on upper qdiscs, we need to call
> qdisc_tree_reduce_backlog(), even if the qlen did not change.
>
> Fixes: 2ccccf5fb43f ("net_sched: update hierarchical backlog too")
> Signed-off-by: Eric Dumazet <edumazet@...gle.com>
> Cc: WANG Cong <xiyou.wangcong@...il.com>
> Cc: Jamal Hadi Salim <jhs@...atatu.com>


Acked-by: Cong Wang <xiyou.wangcong@...il.com>