e288e1bd32
OpenWRT changed the default fq_codel sch->limit from 10240 to 1024, without also adjusting q->flows_cnt. Eric Dumazet explains below that you must also adjust the buckets (q->flows_cnt) for this not to break. Eric explains: Limit of 1024 packets and 1024 flows is not wise I think. (If all buckets are in use, each bucket has a virtual queue of 1 packet, which is almost the same than having no queue at all) I suggest to have at least 8 packets per bucket, to let Codel have a chance to trigger. So you could either reduce number of buckets to 128 (if memory is tight), or increase limit to 8192. flows_cnt is now set to 1024/8=128 Signed-off-by: Kevin Darbyshire-Bryant <kevin@darbyshire-bryant.me.uk>
14 lines
386 B
Diff
14 lines
386 B
Diff
--- a/net/sched/sch_fq_codel.c
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+++ b/net/sched/sch_fq_codel.c
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@@ -412,8 +412,8 @@ static int fq_codel_init(struct Qdisc *s
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struct fq_codel_sched_data *q = qdisc_priv(sch);
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int i;
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- sch->limit = 10*1024;
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- q->flows_cnt = 1024;
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+ sch->limit = 1024;
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+ q->flows_cnt = 128;
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q->quantum = psched_mtu(qdisc_dev(sch));
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q->perturbation = prandom_u32();
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INIT_LIST_HEAD(&q->new_flows);
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