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authorWANG Cong <xiyou.wangcong@gmail.com>2016-02-26 01:55:01 +0300
committerDavid S. Miller <davem@davemloft.net>2016-03-01 01:02:33 +0300
commit2ccccf5fb43ff62b2b96cc58d95fc0b3596516e4 (patch)
treed73ec90b0c0cfd1191ef35a4aa0eaea78af1f100 /net/sched/sch_red.c
parent86a7996cc8a078793670d82ed97d5a99bb4e8496 (diff)
downloadlinux-2ccccf5fb43ff62b2b96cc58d95fc0b3596516e4.tar.xz
net_sched: update hierarchical backlog too
When the bottom qdisc decides to, for example, drop some packet, it calls qdisc_tree_decrease_qlen() to update the queue length for all its ancestors, we need to update the backlog too to keep the stats on root qdisc accurate. 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>
Diffstat (limited to 'net/sched/sch_red.c')
-rw-r--r--net/sched/sch_red.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/sched/sch_red.c b/net/sched/sch_red.c
index d5abcee454d8..8c0508c0e287 100644
--- a/net/sched/sch_red.c
+++ b/net/sched/sch_red.c
@@ -210,7 +210,8 @@ static int red_change(struct Qdisc *sch, struct nlattr *opt)
q->flags = ctl->flags;
q->limit = ctl->limit;
if (child) {
- qdisc_tree_decrease_qlen(q->qdisc, q->qdisc->q.qlen);
+ qdisc_tree_reduce_backlog(q->qdisc, q->qdisc->q.qlen,
+ q->qdisc->qstats.backlog);
qdisc_destroy(q->qdisc);
q->qdisc = child;
}