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| author | Eric Dumazet <edumazet@google.com> | 2016-05-15 18:16:38 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-05-16 21:54:24 -0400 |
| commit | 77f57761466e9aef2b57acf8ce07df11bf360e34 (patch) | |
| tree | 5b60d91757574c917d979ff83c37f69671350c44 /net/sched/sch_fq_codel.c | |
| parent | fd24d72ca9b52558b1511edc814951cdfe5f21cf (diff) | |
| download | linux-77f57761466e9aef2b57acf8ce07df11bf360e34.tar.gz linux-77f57761466e9aef2b57acf8ce07df11bf360e34.tar.bz2 linux-77f57761466e9aef2b57acf8ce07df11bf360e34.zip | |
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 <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sched/sch_fq_codel.c')
| -rw-r--r-- | net/sched/sch_fq_codel.c | 3 |
1 files changed, 2 insertions, 1 deletions
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] = { |