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author | Imre Kaloz <kaloz@openwrt.org> | 2013-10-24 13:50:11 +0000 |
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committer | Imre Kaloz <kaloz@openwrt.org> | 2013-10-24 13:50:11 +0000 |
commit | e72c7e17a475c00134c56f4392578ddc16a47a2e (patch) | |
tree | 842835f958f9c9ed315cb853173d51e43f76bbf5 /target/linux/generic/patches-3.12/657-qdisc_reduce_truesize.patch | |
parent | 4341ea40379ed24c103e37b75661c62bfc3270f6 (diff) | |
download | mtk-20170518-e72c7e17a475c00134c56f4392578ddc16a47a2e.zip mtk-20170518-e72c7e17a475c00134c56f4392578ddc16a47a2e.tar.gz mtk-20170518-e72c7e17a475c00134c56f4392578ddc16a47a2e.tar.bz2 |
preliminary 3.12 support
Signed-off-by: Imre Kaloz <kaloz@openwrt.org>
SVN-Revision: 38528
Diffstat (limited to 'target/linux/generic/patches-3.12/657-qdisc_reduce_truesize.patch')
-rw-r--r-- | target/linux/generic/patches-3.12/657-qdisc_reduce_truesize.patch | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.12/657-qdisc_reduce_truesize.patch b/target/linux/generic/patches-3.12/657-qdisc_reduce_truesize.patch new file mode 100644 index 0000000..93ff7ba --- /dev/null +++ b/target/linux/generic/patches-3.12/657-qdisc_reduce_truesize.patch @@ -0,0 +1,63 @@ +From bc9fec2f87d57bdbff30d296605e24504513f65c Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Dave=20T=C3=A4ht?= <dave.taht@bufferbloat.net> +Date: Mon, 17 Sep 2012 19:20:22 -0700 +Subject: [PATCH 4/7] net: add skb_reduce_truesize support to common qdiscs + +Reduce skb size under load when queues begin to fill on the +commont qdiscs. +--- + net/sched/sch_codel.c | 2 ++ + net/sched/sch_fifo.c | 12 ++++++++---- + net/sched/sch_fq_codel.c | 2 ++ + 3 files changed, 12 insertions(+), 4 deletions(-) + +--- a/net/sched/sch_codel.c ++++ b/net/sched/sch_codel.c +@@ -96,6 +96,8 @@ static int codel_qdisc_enqueue(struct sk + struct codel_sched_data *q; + + if (likely(qdisc_qlen(sch) < sch->limit)) { ++ if(qdisc_qlen(sch) > 128) ++ skb = skb_reduce_truesize(skb); + codel_set_enqueue_time(skb); + return qdisc_enqueue_tail(skb, sch); + } +--- a/net/sched/sch_fifo.c ++++ b/net/sched/sch_fifo.c +@@ -29,17 +29,21 @@ static int bfifo_enqueue(struct sk_buff + + static int pfifo_enqueue(struct sk_buff *skb, struct Qdisc *sch) + { +- if (likely(skb_queue_len(&sch->q) < sch->limit)) ++ if (likely(skb_queue_len(&sch->q) < sch->limit)) { ++ if (skb_queue_len(&sch->q) > 128) ++ skb = skb_reduce_truesize(skb); + return qdisc_enqueue_tail(skb, sch); +- ++ } + return qdisc_reshape_fail(skb, sch); + } + + static int pfifo_tail_enqueue(struct sk_buff *skb, struct Qdisc *sch) + { +- if (likely(skb_queue_len(&sch->q) < sch->limit)) ++ if (likely(skb_queue_len(&sch->q) < sch->limit)) { ++ if (skb_queue_len(&sch->q) > 128) ++ skb = skb_reduce_truesize(skb); + return qdisc_enqueue_tail(skb, sch); +- ++ } + /* queue full, remove one skb to fulfill the limit */ + __qdisc_queue_drop_head(sch, &sch->q); + sch->qstats.drops++; +--- a/net/sched/sch_fq_codel.c ++++ b/net/sched/sch_fq_codel.c +@@ -182,6 +182,8 @@ static int fq_codel_enqueue(struct sk_bu + return ret; + } + idx--; ++ if (sch->q.qlen > 128) ++ skb = skb_reduce_truesize(skb); + + codel_set_enqueue_time(skb); + flow = &q->flows[idx]; |