diff options
| author | Jesse Gross <jesse@nicira.com> | 2012-11-29 02:01:52 +0400 |
|---|---|---|
| committer | Jesse Gross <jesse@nicira.com> | 2012-11-29 02:04:34 +0400 |
| commit | 92eb1d477145b2e7780b5002e856f70b8c3d74da (patch) | |
| tree | dd9856ff7feb1dd9b10485c31c26fe4fa4d344c4 /net/openvswitch/vport-netdev.c | |
| parent | 39c7caebc94e851f58b84b54659156dd30522e8e (diff) | |
| download | linux-92eb1d477145b2e7780b5002e856f70b8c3d74da.tar.xz | |
openvswitch: Use RCU callback when detaching netdevices.
Currently, each time a device is detached from an OVS datapath
we call synchronize RCU before freeing associated data structures.
However, if a bridge is deleted (which detaches all ports) when
many devices are connected then there can be a long delay. This
switches to use call_rcu() to group the cost together.
Reported-by: Justin Pettit <jpettit@nicira.com>
Signed-off-by: Jesse Gross <jesse@nicira.com>
Diffstat (limited to 'net/openvswitch/vport-netdev.c')
| -rw-r--r-- | net/openvswitch/vport-netdev.c | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/net/openvswitch/vport-netdev.c b/net/openvswitch/vport-netdev.c index a9033481fa5e..a9327e2e48ce 100644 --- a/net/openvswitch/vport-netdev.c +++ b/net/openvswitch/vport-netdev.c @@ -114,6 +114,15 @@ error: return ERR_PTR(err); } +static void free_port_rcu(struct rcu_head *rcu) +{ + struct netdev_vport *netdev_vport = container_of(rcu, + struct netdev_vport, rcu); + + dev_put(netdev_vport->dev); + ovs_vport_free(vport_from_priv(netdev_vport)); +} + static void netdev_destroy(struct vport *vport) { struct netdev_vport *netdev_vport = netdev_vport_priv(vport); @@ -122,10 +131,7 @@ static void netdev_destroy(struct vport *vport) netdev_rx_handler_unregister(netdev_vport->dev); dev_set_promiscuity(netdev_vport->dev, -1); - synchronize_rcu(); - - dev_put(netdev_vport->dev); - ovs_vport_free(vport); + call_rcu(&netdev_vport->rcu, free_port_rcu); } const char *ovs_netdev_get_name(const struct vport *vport) |