sch_htb: update backlog as well
authorWANG Cong <xiyou.wangcong@gmail.com>
Thu, 25 Feb 2016 22:55:02 +0000 (14:55 -0800)
committerDavid S. Miller <davem@davemloft.net>
Mon, 29 Feb 2016 22:02:33 +0000 (17:02 -0500)
commit431e3a8e36a05a37126f34b41aa3a5a6456af04e
tree05e33f502c85d05dad61975f6c488f056a515b3c
parent2ccccf5fb43ff62b2b96cc58d95fc0b3596516e4
sch_htb: update backlog as well

We saw qlen!=0 but backlog==0 on our production machine:

qdisc htb 1: dev eth0 root refcnt 2 r2q 10 default 1 direct_packets_stat 0 ver 3.17
 Sent 172680457356 bytes 222469449 pkt (dropped 0, overlimits 123575834 requeues 0)
 backlog 0b 72p requeues 0

The problem is we only count qlen for HTB qdisc but not backlog.
We need to update backlog too when we update qlen, so that we
can at least know the average packet length.

Cc: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/sched/sch_htb.c