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

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Date:	Tue, 14 Jun 2016 17:19:34 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	eric.dumazet@...il.com
Cc:	netdev@...r.kernel.org, xiyou.wangcong@...il.com, jhs@...atatu.com
Subject: Re: [PATCH net] net_sched: fix pfifo_head_drop behavior vs backlog

From: Eric Dumazet <eric.dumazet@...il.com>
Date: Sun, 12 Jun 2016 20:01:25 -0700

> 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>

Applied and queued up for -stable, thanks.