net_sched: sch_codel: defer skb freeing in codel_change()

codel_change() can use rtnl_qdisc_drop()
to defer expensive skb freeing after locks are released.

codel_reset() already has support for deferred skb freeing
because it uses qdisc_reset_queue()

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/sched/sch_codel.c b/net/sched/sch_codel.c
index dddf3bb..c5bc424 100644 (file)
--- a/net/sched/sch_codel.c
+++ b/net/sched/sch_codel.c
@@ -174,7 +174,7 @@ static int codel_change(struct Qdisc *sch, struct nlattr *opt)
 
                dropped += qdisc_pkt_len(skb);
                qdisc_qstats_backlog_dec(sch, skb);
-               qdisc_drop(skb, sch);
+               rtnl_qdisc_drop(skb, sch);
        }
        qdisc_tree_reduce_backlog(sch, qlen - sch->q.qlen, dropped);