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authorEric Dumazet <eric.dumazet@gmail.com>2009-10-27 07:06:59 +0000
committerDavid S. Miller <davem@davemloft.net>2009-10-28 02:22:08 -0700
commit0694c4c016df34c718b9f9ef6ba5aca2e178163a (patch)
tree3f35a7f623114d8435cbdae049ecdbe7abe714d1 /net/ipv4/ipip.c
parent63c8099d90096db56ee1c66c31f05d4fcfbc1c69 (diff)
downloadblackbird-op-linux-0694c4c016df34c718b9f9ef6ba5aca2e178163a.tar.gz
blackbird-op-linux-0694c4c016df34c718b9f9ef6ba5aca2e178163a.zip
ipip: Optimize multiple unregistration
Speedup module unloading by factorizing synchronize_rcu() calls Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/ipip.c')
-rw-r--r--net/ipv4/ipip.c17
1 files changed, 11 insertions, 6 deletions
diff --git a/net/ipv4/ipip.c b/net/ipv4/ipip.c
index 3bd69988bccf..a2ca53da4372 100644
--- a/net/ipv4/ipip.c
+++ b/net/ipv4/ipip.c
@@ -754,16 +754,19 @@ static struct xfrm_tunnel ipip_handler = {
static const char banner[] __initconst =
KERN_INFO "IPv4 over IPv4 tunneling driver\n";
-static void ipip_destroy_tunnels(struct ipip_net *ipn)
+static void ipip_destroy_tunnels(struct ipip_net *ipn, 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 = ipn->tunnels[prio][h]) != NULL)
- unregister_netdevice(t->dev);
+ struct ip_tunnel *t = ipn->tunnels[prio][h];
+
+ while (t != NULL) {
+ unregister_netdevice_queue(t->dev, head);
+ t = t->next;
+ }
}
}
}
@@ -816,11 +819,13 @@ err_alloc:
static void ipip_exit_net(struct net *net)
{
struct ipip_net *ipn;
+ LIST_HEAD(list);
ipn = net_generic(net, ipip_net_id);
rtnl_lock();
- ipip_destroy_tunnels(ipn);
- unregister_netdevice(ipn->fb_tunnel_dev);
+ ipip_destroy_tunnels(ipn, &list);
+ unregister_netdevice_queue(ipn->fb_tunnel_dev, &list);
+ unregister_netdevice_many(&list);
rtnl_unlock();
kfree(ipn);
}
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