This patch series add batching to vxlan/geneve tunnels so that netns
dismantles are less costly.
Haishuang Yan (2):
vxlan: speedup vxlan tunnels dismantle
geneve: speedup geneve tunnels dismantle
drivers/net/geneve.c | 24 ++++++++++++++++--------
drivers/net/vxlan.c | 26 +++++++++++++++++---------
2 files changed, 33 insertions(+), 17 deletions(-)
--
1.8.3.1
Since we now hold RTNL lock in vxlan_exit_net, it's better to batch them
to speedup vxlan tunnels dismantle.
Signed-off-by: Haishuang Yan <[email protected]>
---
drivers/net/vxlan.c | 26 +++++++++++++++++---------
1 file changed, 17 insertions(+), 9 deletions(-)
diff --git a/drivers/net/vxlan.c b/drivers/net/vxlan.c
index 19b9cc5..48a0dc2 100644
--- a/drivers/net/vxlan.c
+++ b/drivers/net/vxlan.c
@@ -3692,18 +3692,16 @@ static __net_init int vxlan_init_net(struct net *net)
return 0;
}
-static void __net_exit vxlan_exit_net(struct net *net)
+static void vxlan_destroy_tunnels(struct net *net, struct list_head *head)
{
struct vxlan_net *vn = net_generic(net, vxlan_net_id);
struct vxlan_dev *vxlan, *next;
struct net_device *dev, *aux;
unsigned int h;
- LIST_HEAD(list);
- rtnl_lock();
for_each_netdev_safe(net, dev, aux)
if (dev->rtnl_link_ops == &vxlan_link_ops)
- unregister_netdevice_queue(dev, &list);
+ unregister_netdevice_queue(dev, head);
list_for_each_entry_safe(vxlan, next, &vn->vxlan_list, next) {
/* If vxlan->dev is in the same netns, it has already been added
@@ -3711,20 +3709,30 @@ static void __net_exit vxlan_exit_net(struct net *net)
*/
if (!net_eq(dev_net(vxlan->dev), net)) {
gro_cells_destroy(&vxlan->gro_cells);
- unregister_netdevice_queue(vxlan->dev, &list);
+ unregister_netdevice_queue(vxlan->dev, head);
}
}
- unregister_netdevice_many(&list);
- rtnl_unlock();
-
for (h = 0; h < PORT_HASH_SIZE; ++h)
WARN_ON_ONCE(!hlist_empty(&vn->sock_list[h]));
}
+static void __net_exit vxlan_exit_batch_net(struct list_head *net_list)
+{
+ struct net *net;
+ LIST_HEAD(list);
+
+ rtnl_lock();
+ list_for_each_entry(net, net_list, exit_list)
+ vxlan_destroy_tunnels(net, &list);
+
+ unregister_netdevice_many(&list);
+ rtnl_unlock();
+}
+
static struct pernet_operations vxlan_net_ops = {
.init = vxlan_init_net,
- .exit = vxlan_exit_net,
+ .exit_batch = vxlan_exit_batch_net,
.id = &vxlan_net_id,
.size = sizeof(struct vxlan_net),
};
--
1.8.3.1
Since we now hold RTNL lock in geneve_exit_net, it's better batch them
to speedup geneve tunnel dismantle.
Signed-off-by: Haishuang Yan <[email protected]>
---
drivers/net/geneve.c | 24 ++++++++++++++++--------
1 file changed, 16 insertions(+), 8 deletions(-)
diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
index b718a02..667c44f 100644
--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -1638,19 +1638,16 @@ static __net_init int geneve_init_net(struct net *net)
return 0;
}
-static void __net_exit geneve_exit_net(struct net *net)
+static void geneve_destroy_tunnels(struct net *net, struct list_head *head)
{
struct geneve_net *gn = net_generic(net, geneve_net_id);
struct geneve_dev *geneve, *next;
struct net_device *dev, *aux;
- LIST_HEAD(list);
-
- rtnl_lock();
/* gather any geneve devices that were moved into this ns */
for_each_netdev_safe(net, dev, aux)
if (dev->rtnl_link_ops == &geneve_link_ops)
- unregister_netdevice_queue(dev, &list);
+ unregister_netdevice_queue(dev, head);
/* now gather any other geneve devices that were created in this ns */
list_for_each_entry_safe(geneve, next, &gn->geneve_list, next) {
@@ -1658,18 +1655,29 @@ static void __net_exit geneve_exit_net(struct net *net)
* to the list by the previous loop.
*/
if (!net_eq(dev_net(geneve->dev), net))
- unregister_netdevice_queue(geneve->dev, &list);
+ unregister_netdevice_queue(geneve->dev, head);
}
+ WARN_ON_ONCE(!list_empty(&gn->sock_list));
+}
+
+static void __net_exit geneve_exit_batch_net(struct list_head *net_list)
+{
+ struct net *net;
+ LIST_HEAD(list);
+
+ rtnl_lock();
+ list_for_each_entry(net, net_list, exit_list)
+ geneve_destroy_tunnels(net, &list);
+
/* unregister the devices gathered above */
unregister_netdevice_many(&list);
rtnl_unlock();
- WARN_ON_ONCE(!list_empty(&gn->sock_list));
}
static struct pernet_operations geneve_net_ops = {
.init = geneve_init_net,
- .exit = geneve_exit_net,
+ .exit_batch = geneve_exit_batch_net,
.id = &geneve_net_id,
.size = sizeof(struct geneve_net),
};
--
1.8.3.1
From: Haishuang Yan <[email protected]>
Date: Sat, 16 Dec 2017 17:54:48 +0800
> This patch series add batching to vxlan/geneve tunnels so that netns
> dismantles are less costly.
Series applied, thank you.