63 lines
1.9 KiB
Diff
63 lines
1.9 KiB
Diff
From bc9fec2f87d57bdbff30d296605e24504513f65c Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Dave=20T=C3=A4ht?= <dave.taht@bufferbloat.net>
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Date: Mon, 17 Sep 2012 19:20:22 -0700
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Subject: [PATCH 4/7] net: add skb_reduce_truesize support to common qdiscs
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Reduce skb size under load when queues begin to fill on the
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commont qdiscs.
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---
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net/sched/sch_codel.c | 2 ++
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net/sched/sch_fifo.c | 12 ++++++++----
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net/sched/sch_fq_codel.c | 2 ++
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3 files changed, 12 insertions(+), 4 deletions(-)
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--- a/net/sched/sch_codel.c
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+++ b/net/sched/sch_codel.c
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@@ -96,6 +96,8 @@ static int codel_qdisc_enqueue(struct sk
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struct codel_sched_data *q;
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if (likely(qdisc_qlen(sch) < sch->limit)) {
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+ if(qdisc_qlen(sch) > 128)
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+ skb = skb_reduce_truesize(skb);
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codel_set_enqueue_time(skb);
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return qdisc_enqueue_tail(skb, sch);
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}
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--- a/net/sched/sch_fifo.c
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+++ b/net/sched/sch_fifo.c
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@@ -29,17 +29,21 @@ static int bfifo_enqueue(struct sk_buff
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static int pfifo_enqueue(struct sk_buff *skb, struct Qdisc *sch)
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{
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- if (likely(skb_queue_len(&sch->q) < sch->limit))
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+ if (likely(skb_queue_len(&sch->q) < sch->limit)) {
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+ if (skb_queue_len(&sch->q) > 128)
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+ skb = skb_reduce_truesize(skb);
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return qdisc_enqueue_tail(skb, sch);
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-
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+ }
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return qdisc_reshape_fail(skb, sch);
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}
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static int pfifo_tail_enqueue(struct sk_buff *skb, struct Qdisc *sch)
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{
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- if (likely(skb_queue_len(&sch->q) < sch->limit))
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+ if (likely(skb_queue_len(&sch->q) < sch->limit)) {
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+ if (skb_queue_len(&sch->q) > 128)
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+ skb = skb_reduce_truesize(skb);
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return qdisc_enqueue_tail(skb, sch);
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-
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+ }
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/* queue full, remove one skb to fulfill the limit */
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__qdisc_queue_drop_head(sch, &sch->q);
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sch->qstats.drops++;
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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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@@ -182,6 +182,8 @@ static int fq_codel_enqueue(struct sk_bu
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return ret;
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}
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idx--;
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+ if (sch->q.qlen > 128)
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+ skb = skb_reduce_truesize(skb);
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codel_set_enqueue_time(skb);
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flow = &q->flows[idx];
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