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openvswitch: change the data type of error status to atomic_long_t

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Change the date type of error status from u64 to atomic_long_t, and use atomic
operation, then remove the lock which is used to protect the error status.

The operation of atomic maybe faster than spin lock.

Cc: Pravin Shelar <pshelar@nicira.com>
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Li RongQing
2014-09-06 19:06:11 +08:00
committed by David S. Miller
parent 5aaa62d608
commit e403aded79
2 changed files with 12 additions and 23 deletions
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10
net/openvswitch/vport.h
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@@ -62,10 +62,10 @@ int ovs_vport_send(struct vport *, struct sk_buff *);
/* The following definitions are for implementers of vport devices: */
struct vport_err_stats {
u64 rx_dropped;
u64 rx_errors;
u64 tx_dropped;
u64 tx_errors;
atomic_long_t rx_dropped;
atomic_long_t rx_errors;
atomic_long_t tx_dropped;
atomic_long_t tx_errors;
};
/**
* struct vport_portids - array of netlink portids of a vport.
@@ -93,7 +93,6 @@ struct vport_portids {
* @dp_hash_node: Element in @datapath->ports hash table in datapath.c.
* @ops: Class structure.
* @percpu_stats: Points to per-CPU statistics used and maintained by vport
* @stats_lock: Protects @err_stats;
* @err_stats: Points to error statistics used and maintained by vport
*/
struct vport {
@@ -108,7 +107,6 @@ struct vport {
struct pcpu_sw_netstats __percpu *percpu_stats;
spinlock_t stats_lock;
struct vport_err_stats err_stats;
};