From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: [PATCH net-next-2.6] ip6mr: Optimize multiple unregistration Date: Wed, 28 Oct 2009 15:48:11 +0100 Message-ID: <4AE859AB.8030801@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Linux Netdev List To: "David S. Miller" Return-path: Received: from gw1.cosmosbay.com ([212.99.114.194]:57212 "EHLO gw1.cosmosbay.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753774AbZJ1OsK (ORCPT ); Wed, 28 Oct 2009 10:48:10 -0400 Sender: netdev-owner@vger.kernel.org List-ID: Speedup module unloading by factorizing synchronize_rcu() calls Signed-off-by: Eric Dumazet --- net/ipv6/ip6mr.c | 15 ++++++++++----- 1 files changed, 10 insertions(+), 5 deletions(-) diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index 85849b4..52e0f74 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -477,7 +477,7 @@ failure: * Delete a VIF entry */ -static int mif6_delete(struct net *net, int vifi) +static int mif6_delete(struct net *net, int vifi, struct list_head *head) { struct mif_device *v; struct net_device *dev; @@ -519,7 +519,7 @@ static int mif6_delete(struct net *net, int vifi) in6_dev->cnf.mc_forwarding--; if (v->flags & MIFF_REGISTER) - unregister_netdevice(dev); + unregister_netdevice_queue(dev, head); dev_put(dev); return 0; @@ -976,6 +976,7 @@ static int ip6mr_device_event(struct notifier_block *this, struct net *net = dev_net(dev); struct mif_device *v; int ct; + LIST_HEAD(list); if (event != NETDEV_UNREGISTER) return NOTIFY_DONE; @@ -983,8 +984,10 @@ static int ip6mr_device_event(struct notifier_block *this, v = &net->ipv6.vif6_table[0]; for (ct = 0; ct < net->ipv6.maxvif; ct++, v++) { if (v->dev == dev) - mif6_delete(net, ct); + mif6_delete(net, ct, &list); } + unregister_netdevice_many(&list); + return NOTIFY_DONE; } @@ -1188,14 +1191,16 @@ static int ip6mr_mfc_add(struct net *net, struct mf6cctl *mfc, int mrtsock) static void mroute_clean_tables(struct net *net) { int i; + LIST_HEAD(list); /* * Shut down all active vif entries */ for (i = 0; i < net->ipv6.maxvif; i++) { if (!(net->ipv6.vif6_table[i].flags & VIFF_STATIC)) - mif6_delete(net, i); + mif6_delete(net, i, &list); } + unregister_netdevice_many(&list); /* * Wipe the cache @@ -1325,7 +1330,7 @@ int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, uns if (copy_from_user(&mifi, optval, sizeof(mifi_t))) return -EFAULT; rtnl_lock(); - ret = mif6_delete(net, mifi); + ret = mif6_delete(net, mifi, NULL); rtnl_unlock(); return ret;