From: Eric Dumazet <edumazet@google.com>
Date: Tue, 14 Jun 2016 03:21:52 +0000 (-0700)
Subject: net_sched: sch_codel: defer skb freeing in codel_change()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b3d7e2b29b226c986cbd4efcaf43ab3ff90e6fdb;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

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 dddf3bb65a32..c5bc424e3b3c 100644
--- 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);