On 10/13/16 3:29 PM, Eric Dumazet wrote: > Since netif_index_is_l3_master() is not cheap, can you reorder the > test ? > > if (!net->ipv4.sysctl_tcp_l3mdev_accept) > return netif_index_is_l3_master(net, dif);
sure. Since this use case is called under rcu_read_lock I can make a netif_index_is_l3_master_rcu which saves a few cycles.
