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Subject[PATCH 2/6] 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.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
---
net/core/netprio_cgroup.c | 6 ------
1 files changed, 0 insertions(+), 6 deletions(-)
diff --git a/net/core/netprio_cgroup.c b/net/core/netprio_cgroup.c
index a296cbb..2edfa6b 100644
--- a/net/core/netprio_cgroup.c
+++ b/net/core/netprio_cgroup.c
@@ -270,7 +270,6 @@ 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
@@ -278,11 +277,6 @@ 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);
--
1.7.3.1

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