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Subject[PATCH RFC v1 net-next 4/4] net/sched: sch_cbq: Use Qdisc backpressure infrastructure
Date
From: Peilin Ye <peilin.ye@bytedance.com>

Recently we introduced a Qdisc backpressure infrastructure for TCP and
UDP sockets. Use it in CBQ.

Suggested-by: Cong Wang <cong.wang@bytedance.com>
Signed-off-by: Peilin Ye <peilin.ye@bytedance.com>
---
net/sched/sch_cbq.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index 02d9f0dfe356..4a5204da49d0 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -382,6 +382,7 @@ cbq_enqueue(struct sk_buff *skb, struct Qdisc *sch,
return ret;
}

+ qdisc_backpressure_overlimit(sch, skb);
if (net_xmit_drop_count(ret)) {
qdisc_qstats_drop(sch);
cbq_mark_toplevel(q, cl);
@@ -509,6 +510,7 @@ static enum hrtimer_restart cbq_undelay(struct hrtimer *timer)

time = 0;
time = ktime_add_ns(time, PSCHED_TICKS2NS(now + delay));
+ qdisc_backpressure_throttle(sch);
hrtimer_start(&q->delay_timer, time, HRTIMER_MODE_ABS_PINNED);
}

@@ -851,9 +853,11 @@ cbq_dequeue(struct Qdisc *sch)

if (sch->q.qlen) {
qdisc_qstats_overlimit(sch);
- if (q->wd_expires)
+ if (q->wd_expires) {
+ qdisc_backpressure_throttle(sch);
qdisc_watchdog_schedule(&q->watchdog,
now + q->wd_expires);
+ }
}
return NULL;
}
--
2.20.1
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