openwrtv4/target/linux/generic/pending-3.18/657-qdisc_reduce_truesize.patch
John Crispin 74d00a8c38 kernel: split patches folder up into backport, pending and hack folders
* properly format/comment all patches
* merge debloat patches
* merge Kconfig patches
* merge swconfig patches
* merge hotplug patches
* drop 200-fix_localversion.patch - upstream
* drop 222-arm_zimage_none.patch - unused
* drop 252-mv_cesa_depends.patch - no longer required
* drop 410-mtd-move-forward-declaration-of-struct-mtd_info.patch - unused
* drop 661-fq_codel_keep_dropped_stats.patch - outdated
* drop 702-phy_add_aneg_done_function.patch - upstream
* drop 840-rtc7301.patch - unused
* drop 841-rtc_pt7c4338.patch - upstream
* drop 921-use_preinit_as_init.patch - unused
* drop spio-gpio-old and gpio-mmc - unused

Signed-off-by: John Crispin <john@phrozen.org>
2017-08-05 08:46:36 +02:00

63 lines
1.9 KiB
Diff

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
@@ -97,6 +97,8 @@ 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);
qdisc_qstats_drop(sch);
--- a/net/sched/sch_fq_codel.c
+++ b/net/sched/sch_fq_codel.c
@@ -185,6 +185,8 @@ 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];