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    Subject[PATCH 4.4 088/312] sch_drr: update backlog as well
    Date
    From: WANG Cong <xiyou.wangcong@gmail.com>

    commit 6a73b571b63075ef408c83f07c2565b5652f93cc upstream.

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

    ---
    net/sched/sch_drr.c | 4 ++++
    1 file changed, 4 insertions(+)

    --- a/net/sched/sch_drr.c
    +++ b/net/sched/sch_drr.c
    @@ -375,6 +375,7 @@ static int drr_enqueue(struct sk_buff *s
    cl->deficit = cl->quantum;
    }

    + qdisc_qstats_backlog_inc(sch, skb);
    sch->q.qlen++;
    return err;
    }
    @@ -405,6 +406,7 @@ static struct sk_buff *drr_dequeue(struc

    bstats_update(&cl->bstats, skb);
    qdisc_bstats_update(sch, skb);
    + qdisc_qstats_backlog_dec(sch, skb);
    sch->q.qlen--;
    return skb;
    }
    @@ -426,6 +428,7 @@ static unsigned int drr_drop(struct Qdis
    if (cl->qdisc->ops->drop) {
    len = cl->qdisc->ops->drop(cl->qdisc);
    if (len > 0) {
    + sch->qstats.backlog -= len;
    sch->q.qlen--;
    if (cl->qdisc->q.qlen == 0)
    list_del(&cl->alist);
    @@ -461,6 +464,7 @@ static void drr_reset_qdisc(struct Qdisc
    qdisc_reset(cl->qdisc);
    }
    }
    + sch->qstats.backlog = 0;
    sch->q.qlen = 0;
    }


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