datapath: Per NUMA node flow stats.

[sliver-openvswitch.git] / datapath / flow.h

diff --git a/datapath/flow.h b/datapath/flow.h
index c4de0e6..270a324 100644 (file)
--- a/datapath/flow.h
+++ b/datapath/flow.h
@@ -161,12 +161,18 @@ struct sw_flow {
        struct rcu_head rcu;
        struct hlist_node hash_node[2];
        u32 hash;
-
+       int stats_last_writer;          /* NUMA-node id of the last writer on
+                                        * 'stats[0]'.
+                                        */
        struct sw_flow_key key;
        struct sw_flow_key unmasked_key;
        struct sw_flow_mask *mask;
        struct sw_flow_actions __rcu *sf_acts;
-       struct flow_stats __percpu *stats;
+       struct flow_stats __rcu *stats[]; /* One for each NUMA node.  First one
+                                          * is allocated at flow creation time,
+                                          * the rest are allocated on demand
+                                          * while holding the 'stats[0].lock'.
+                                          */
 };
 
 struct arp_eth_header {