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openvswitch: Use RCU callback when detaching netdevices.

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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>
This commit is contained in:
Jesse Gross 2012-11-28 14:01:52 -08:00
parent 39c7caebc9
commit 92eb1d4771
2 changed files with 13 additions and 4 deletions
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3
net/openvswitch/vport-netdev.h
View file

@ -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;
};