From 77f57761466e9aef2b57acf8ce07df11bf360e34 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Sun, 15 May 2016 18:16:38 -0700 Subject: fq_codel: fix memory limitation drift memory_usage must be decreased in dequeue_func(), not in fq_codel_dequeue(), otherwise packets dropped by Codel algo are missing this decrease. Also we need to clear memory_usage in fq_codel_reset() Fixes: 95b58430abe7 ("fq_codel: add memory limitation per queue") Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/sched/sch_fq_codel.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'net/sched') diff --git a/net/sched/sch_fq_codel.c b/net/sched/sch_fq_codel.c index bb8bd9314629..6883a8971562 100644 --- a/net/sched/sch_fq_codel.c +++ b/net/sched/sch_fq_codel.c @@ -262,6 +262,7 @@ static struct sk_buff *dequeue_func(struct codel_vars *vars, void *ctx) if (flow->head) { skb = dequeue_head(flow); q->backlogs[flow - q->flows] -= qdisc_pkt_len(skb); + q->memory_usage -= skb->truesize; sch->q.qlen--; sch->qstats.backlog -= qdisc_pkt_len(skb); } @@ -318,7 +319,6 @@ begin: list_del_init(&flow->flowchain); goto begin; } - q->memory_usage -= skb->truesize; qdisc_bstats_update(sch, skb); flow->deficit -= qdisc_pkt_len(skb); /* We cant call qdisc_tree_reduce_backlog() if our qlen is 0, @@ -355,6 +355,7 @@ static void fq_codel_reset(struct Qdisc *sch) } memset(q->backlogs, 0, q->flows_cnt * sizeof(u32)); sch->q.qlen = 0; + q->memory_usage = 0; } static const struct nla_policy fq_codel_policy[TCA_FQ_CODEL_MAX + 1] = { -- cgit v1.2.3