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41 lines
1.2 KiB
Diff
41 lines
1.2 KiB
Diff
From: Eric Dumazet <edumazet@google.com>
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Date: Sun, 15 May 2016 18:16:38 -0700
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Subject: [PATCH] fq_codel: fix memory limitation drift
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memory_usage must be decreased in dequeue_func(), not in
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fq_codel_dequeue(), otherwise packets dropped by Codel algo
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are missing this decrease.
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Also we need to clear memory_usage in fq_codel_reset()
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Fixes: 95b58430abe7 ("fq_codel: add memory limitation per queue")
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Signed-off-by: Eric Dumazet <edumazet@google.com>
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---
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--- a/net/sched/sch_fq_codel.c
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+++ b/net/sched/sch_fq_codel.c
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@@ -259,6 +259,7 @@ static struct sk_buff *dequeue(struct co
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if (flow->head) {
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skb = dequeue_head(flow);
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q->backlogs[flow - q->flows] -= qdisc_pkt_len(skb);
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+ q->memory_usage -= skb->truesize;
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sch->q.qlen--;
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}
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return skb;
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@@ -306,7 +307,6 @@ begin:
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list_del_init(&flow->flowchain);
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goto begin;
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}
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- q->memory_usage -= skb->truesize;
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qdisc_bstats_update(sch, skb);
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flow->deficit -= qdisc_pkt_len(skb);
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/* We cant call qdisc_tree_reduce_backlog() if our qlen is 0,
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@@ -343,6 +343,7 @@ static void fq_codel_reset(struct Qdisc
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}
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memset(q->backlogs, 0, q->flows_cnt * sizeof(u32));
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sch->q.qlen = 0;
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+ q->memory_usage = 0;
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}
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static const struct nla_policy fq_codel_policy[TCA_FQ_CODEL_MAX + 1] = {
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