From 62808f91237181dbac74c2b5be4fa92adfbbbe40 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 28 Oct 2009 04:37:43 +0000 Subject: ipv6 sit: Optimize multiple unregistration Speedup module unloading by factorizing synchronize_rcu() calls Signed-off-by: Eric Dumazet Signed-off-by: David S. Miller --- net/ipv6/sit.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-) diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c index b6b16264b30..2362a3397e9 100644 --- a/net/ipv6/sit.c +++ b/net/ipv6/sit.c @@ -1145,16 +1145,19 @@ static struct xfrm_tunnel sit_handler = { .priority = 1, }; -static void sit_destroy_tunnels(struct sit_net *sitn) +static void sit_destroy_tunnels(struct sit_net *sitn, struct list_head *head) { int prio; for (prio = 1; prio < 4; prio++) { int h; for (h = 0; h < HASH_SIZE; h++) { - struct ip_tunnel *t; - while ((t = sitn->tunnels[prio][h]) != NULL) - unregister_netdevice(t->dev); + struct ip_tunnel *t = sitn->tunnels[prio][h]; + + while (t != NULL) { + unregister_netdevice_queue(t->dev, head); + t = t->next; + } } } } @@ -1208,11 +1211,13 @@ err_alloc: static void sit_exit_net(struct net *net) { struct sit_net *sitn; + LIST_HEAD(list); sitn = net_generic(net, sit_net_id); rtnl_lock(); - sit_destroy_tunnels(sitn); - unregister_netdevice(sitn->fb_tunnel_dev); + sit_destroy_tunnels(sitn, &list); + unregister_netdevice_queue(sitn->fb_tunnel_dev, &list); + unregister_netdevice_many(&list); rtnl_unlock(); kfree(sitn); } -- cgit v1.2.3-70-g09d2