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authorCong Wang <xiyou.wangcong@gmail.com>2020-05-27 07:35:24 +0300
committerDavid S. Miller <davem@davemloft.net>2020-05-28 01:05:49 +0300
commita34dac0b9055202cf9c64e08d8d8dc5e23029d3a (patch)
treeb2276cda43830ba8dc9702c5dffaff950d0bee44 /net
parent4909daba37846317ec7dcba16fba009636f7fe21 (diff)
downloadlinux-a34dac0b9055202cf9c64e08d8d8dc5e23029d3a.tar.xz
net_sched: add tracepoints for qdisc_reset() and qdisc_destroy()
Add two tracepoints for qdisc_reset() and qdisc_destroy() to track qdisc resetting and destroying. Sample output: tc-756 [000] ...3 138.355662: qdisc_reset: dev=ens3 kind=pfifo_fast parent=ffff:ffff handle=0:0 tc-756 [000] ...1 138.355720: qdisc_reset: dev=ens3 kind=pfifo_fast parent=ffff:ffff handle=0:0 tc-756 [000] ...1 138.355867: qdisc_reset: dev=ens3 kind=pfifo_fast parent=ffff:ffff handle=0:0 tc-756 [000] ...1 138.355930: qdisc_destroy: dev=ens3 kind=pfifo_fast parent=ffff:ffff handle=0:0 tc-757 [000] ...2 143.073780: qdisc_reset: dev=ens3 kind=fq_codel parent=ffff:ffff handle=8001:0 tc-757 [000] ...1 143.073878: qdisc_reset: dev=ens3 kind=fq_codel parent=ffff:ffff handle=8001:0 tc-757 [000] ...1 143.074114: qdisc_reset: dev=ens3 kind=fq_codel parent=ffff:ffff handle=8001:0 tc-757 [000] ...1 143.074228: qdisc_destroy: dev=ens3 kind=fq_codel parent=ffff:ffff handle=8001:0 Cc: Jamal Hadi Salim <jhs@mojatatu.com> Cc: Jiri Pirko <jiri@resnulli.us> Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sched/sch_generic.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 7a0b06001e48..abaa446ed01a 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -911,6 +911,8 @@ void qdisc_reset(struct Qdisc *qdisc)
const struct Qdisc_ops *ops = qdisc->ops;
struct sk_buff *skb, *tmp;
+ trace_qdisc_reset(qdisc);
+
if (ops->reset)
ops->reset(qdisc);
@@ -965,6 +967,8 @@ static void qdisc_destroy(struct Qdisc *qdisc)
module_put(ops->owner);
dev_put(qdisc_dev(qdisc));
+ trace_qdisc_destroy(qdisc);
+
call_rcu(&qdisc->rcu, qdisc_free_cb);
}