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authorEric Dumazet <edumazet@google.com>2016-05-15 18:16:38 -0700
committerDavid S. Miller <davem@davemloft.net>2016-05-16 21:54:24 -0400
commit77f57761466e9aef2b57acf8ce07df11bf360e34 (patch)
tree5b60d91757574c917d979ff83c37f69671350c44 /net/sched/sch_fq_codel.c
parentnet: ethernet: ftgmac100: use phy_ethtool_{get|set}_link_ksettings (diff)
downloadlinux-dev-77f57761466e9aef2b57acf8ce07df11bf360e34.tar.xz
linux-dev-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.c3
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] = {