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Commit f5c38208 authored by Neil Horman's avatar Neil Horman Committed by David S. Miller
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netprio_cgroup: don't allocate prio table when a device is registered 



So we delay the allocation till the priority is set through cgroup,
and this makes skb_update_priority() faster when it's not set.

This also eliminates an off-by-one bug similar with the one fixed
in the previous patch.

Origionally-authored-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
Signed-off-by: default avatarNeil Horman <nhorman@tuxdriver.com>
CC: "David S. Miller" <davem@davemloft.net>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a87dfe14

net/core/netprio_cgroup.c

+0 −6
Original line number Diff line number Diff line
@@ -271,7 +271,6 @@ static int netprio_device_event(struct notifier_block *unused, 
{

	struct net_device *dev = ptr;

	struct netprio_map *old;

	u32 max_len = atomic_read(&max_prioidx);



	/*

	 * Note this is called with rtnl_lock held so we have update side
@@ -279,11 +278,6 @@ static int netprio_device_event(struct notifier_block *unused, 
	 */



	switch (event) {



	case NETDEV_REGISTER:

		if (max_len)

			extend_netdev_table(dev, max_len);

		break;

	case NETDEV_UNREGISTER:

		old = rtnl_dereference(dev->priomap);

		RCU_INIT_POINTER(dev->priomap, NULL);