[PATCH 6/6] gre: Optimize multiple unregistration
From: Eric Dumazet <hidden>
Date: 2009-10-27 17:07:28
Subsystem:
networking [general], networking [ipv4/ipv6], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, David Ahern, Ido Schimmel, Linus Torvalds
Speedup module unloading by factorizing synchronize_rcu() calls Signed-off-by: Eric Dumazet <redacted> --- net/ipv4/ip_gre.c | 15 ++++++++++----- 1 files changed, 10 insertions(+), 5 deletions(-)
diff --git a/net/ipv4/ip_gre.c b/net/ipv4/ip_gre.c
index 40f0439..a77807d 100644
--- a/net/ipv4/ip_gre.c
+++ b/net/ipv4/ip_gre.c@@ -1290,16 +1290,19 @@ static const struct net_protocol ipgre_protocol = { .netns_ok = 1, }; -static void ipgre_destroy_tunnels(struct ipgre_net *ign) +static void ipgre_destroy_tunnels(struct ipgre_net *ign, struct list_head *head) { int prio; for (prio = 0; prio < 4; prio++) { int h; for (h = 0; h < HASH_SIZE; h++) { - struct ip_tunnel *t; - while ((t = ign->tunnels[prio][h]) != NULL) - unregister_netdevice(t->dev); + struct ip_tunnel *t = ign->tunnels[prio][h]; + + while (t != NULL) { + unregister_netdevice_queue(t->dev, head); + t = t->next; + } } } }
@@ -1347,10 +1350,12 @@ err_alloc: static void ipgre_exit_net(struct net *net) { struct ipgre_net *ign; + LIST_HEAD(list); ign = net_generic(net, ipgre_net_id); rtnl_lock(); - ipgre_destroy_tunnels(ign); + ipgre_destroy_tunnels(ign, &list); + unregister_netdevice_many(&list); rtnl_unlock(); kfree(ign); }