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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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