[net-next 2/2] ipvs: batch __ip_vs_dev_cleanup

[Haishuang Yan <yanhaishuang@xxxxxxxxxxxxxxxxxxxx>]

It's better to batch __ip_vs_cleanup to speedup ipvs
devices dismantle.

Signed-off-by: Haishuang Yan <yanhaishuang@xxxxxxxxxxxxxxxxxxxx>
---
 net/netfilter/ipvs/ip_vs_core.c | 20 +++++++++++++-------
 1 file changed, 13 insertions(+), 7 deletions(-)

diff --git a/net/netfilter/ipvs/ip_vs_core.c b/net/netfilter/ipvs/ip_vs_core.c
index b4d79b7..58af24a 100644
--- a/net/netfilter/ipvs/ip_vs_core.c
+++ b/net/netfilter/ipvs/ip_vs_core.c
@@ -2434,14 +2434,20 @@ static int __net_init __ip_vs_dev_init(struct net *net)
        return ret;
 }
 
-static void __net_exit __ip_vs_dev_cleanup(struct net *net)
+static void __net_exit __ip_vs_dev_cleanup_batch(struct list_head *net_list)
 {
-       struct netns_ipvs *ipvs = net_ipvs(net);
+       struct netns_ipvs *ipvs;
+       struct net *net;
+       LIST_HEAD(list);
+
        EnterFunction(2);
-       nf_unregister_net_hooks(net, ip_vs_ops, ARRAY_SIZE(ip_vs_ops));
-       ipvs->enable = 0;       /* Disable packet reception */
-       smp_wmb();
-       ip_vs_sync_net_cleanup(ipvs);
+       list_for_each_entry(net, net_list, exit_list) {
+               ipvs = net_ipvs(net);
+               nf_unregister_net_hooks(net, ip_vs_ops, ARRAY_SIZE(ip_vs_ops));
+               ipvs->enable = 0;       /* Disable packet reception */
+               smp_wmb();
+               ip_vs_sync_net_cleanup(ipvs);
+       }
        LeaveFunction(2);
 }
 
@@ -2454,7 +2460,7 @@ static void __net_exit __ip_vs_dev_cleanup(struct net 
*net)
 
 static struct pernet_operations ipvs_core_dev_ops = {
        .init = __ip_vs_dev_init,
-       .exit = __ip_vs_dev_cleanup,
+       .exit_batch = __ip_vs_dev_cleanup_batch,
 };
 
 /*
-- 
1.8.3.1