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Commit f1e9016d authored by stephen hemminger's avatar stephen hemminger Committed by David S. Miller
Browse files

net: use rcu for network scheduler API 



Use RCU to walk list of network devices in qdisc dump.
This could be optimized for large number of devices.

Signed-off-by: default avatarStephen Hemminger <shemminger@vyatta.com>
Acked-by: default avatarEric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9e067597

net/sched/sch_api.c

+4 −3
Original line number Diff line number Diff line
@@ -1279,9 +1279,10 @@ static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb) 


	s_idx = cb->args[0];

	s_q_idx = q_idx = cb->args[1];

	read_lock(&dev_base_lock);



	rcu_read_lock();

	idx = 0;

	for_each_netdev(&init_net, dev) {

	for_each_netdev_rcu(&init_net, dev) {

		struct netdev_queue *dev_queue;



		if (idx < s_idx)
@@ -1302,7 +1303,7 @@ static int tc_dump_qdisc(struct sk_buff *skb, struct netlink_callback *cb) 
	}



done:

	read_unlock(&dev_base_lock);

	rcu_read_unlock();



	cb->args[0] = idx;

	cb->args[1] = q_idx;