diff options
| author | Jesse Gross <jesse@nicira.com> | 2012-11-28 14:01:52 -0800 |
|---|---|---|
| committer | Jesse Gross <jesse@nicira.com> | 2012-11-28 14:04:34 -0800 |
| commit | 92eb1d477145b2e7780b5002e856f70b8c3d74da (patch) | |
| tree | dd9856ff7feb1dd9b10485c31c26fe4fa4d344c4 /net/openvswitch | |
| parent | 39c7caebc94e851f58b84b54659156dd30522e8e (diff) | |
| download | linux-92eb1d477145b2e7780b5002e856f70b8c3d74da.tar.bz2 | |
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')
| -rw-r--r-- | net/openvswitch/vport-netdev.c | 14 | ||||
| -rw-r--r-- | net/openvswitch/vport-netdev.h | 3 |
2 files changed, 13 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) diff --git a/net/openvswitch/vport-netdev.h b/net/openvswitch/vport-netdev.h index f7072a25c604..6478079b3417 100644 --- a/net/openvswitch/vport-netdev.h +++ b/net/openvswitch/vport-netdev.h @@ -20,12 +20,15 @@ #define VPORT_NETDEV_H 1 #include <linux/netdevice.h> +#include <linux/rcupdate.h> #include "vport.h" struct vport *ovs_netdev_get_vport(struct net_device *dev); struct netdev_vport { + struct rcu_head rcu; + struct net_device *dev; }; |