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    Subject[PATCH 4.4 091/312] sch_qfq: keep backlog updated with qlen
    Date
    From: WANG Cong <xiyou.wangcong@gmail.com>

    commit 2ed5c3f09627f72a2e0e407a86b2ac05494190f9 upstream.

    Reported-by: Stas Nichiporovich <stasn77@gmail.com>
    Fixes: 2ccccf5fb43f ("net_sched: update hierarchical backlog too")
    Cc: Jamal Hadi Salim <jhs@mojatatu.com>
    Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
    Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
    Signed-off-by: David S. Miller <davem@davemloft.net>
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

    ---
    net/sched/sch_qfq.c | 3 +++
    1 file changed, 3 insertions(+)

    --- a/net/sched/sch_qfq.c
    +++ b/net/sched/sch_qfq.c
    @@ -1150,6 +1150,7 @@ static struct sk_buff *qfq_dequeue(struc
    if (!skb)
    return NULL;

    + qdisc_qstats_backlog_dec(sch, skb);
    sch->q.qlen--;
    qdisc_bstats_update(sch, skb);

    @@ -1250,6 +1251,7 @@ static int qfq_enqueue(struct sk_buff *s
    }

    bstats_update(&cl->bstats, skb);
    + qdisc_qstats_backlog_inc(sch, skb);
    ++sch->q.qlen;

    agg = cl->agg;
    @@ -1516,6 +1518,7 @@ static void qfq_reset_qdisc(struct Qdisc
    qdisc_reset(cl->qdisc);
    }
    }
    + sch->qstats.backlog = 0;
    sch->q.qlen = 0;
    }


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