Re: [PATCH net] net_sched: fix pfifo_head_drop behavior vs backlog
From: Cong Wang <hidden>
Date: 2016-06-13 03:48:20
On Sun, Jun 12, 2016 at 8:01 PM, Eric Dumazet [off-list ref] wrote:
From: Eric Dumazet <edumazet@google.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@google.com>
Cc: WANG Cong <redacted>
Cc: Jamal Hadi Salim <jhs@mojatatu.com>Acked-by: Cong Wang <redacted>