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act_vlan: Change stats update to use per-core stats 

The VLAN action maintains one set of stats across all cores, and uses a
spinlock to synchronize updates to it from the same. Changed this to use a
per-CPU stats context instead.
This change will result in better performance.

Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Manish Kurup <manish.kurup@verizon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Manish Kurup 2017-11-07 15:48:15 -05:00 committed by David S. Miller
parent cbad52e92a
commit e0496cbbf8
1 changed files with 6 additions and 4 deletions
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10
net/sched/act_vlan.c
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@ -30,9 +30,10 @@ static int tcf_vlan(struct sk_buff *skb, const struct tc_action *a,
int err;
u16 tci;
spin_lock(&v->tcf_lock);
tcf_lastuse_update(&v->tcf_tm);
bstats_update(&v->tcf_bstats, skb);
bstats_cpu_update(this_cpu_ptr(v->common.cpu_bstats), skb);
spin_lock(&v->tcf_lock);
action = v->tcf_action;
/* Ensure 'data' points at mac_header prior calling vlan manipulating
@ -85,7 +86,8 @@ static int tcf_vlan(struct sk_buff *skb, const struct tc_action *a,
drop:
action = TC_ACT_SHOT;
v->tcf_qstats.drops++;
qstats_drop_inc(this_cpu_ptr(v->common.cpu_qstats));
unlock:
if (skb_at_tc_ingress(skb))
skb_pull_rcsum(skb, skb->mac_len);
@ -172,7 +174,7 @@ static int tcf_vlan_init(struct net *net, struct nlattr *nla,
if (!exists) {
ret = tcf_idr_create(tn, parm->index, est, a,
&act_vlan_ops, bind, false);
&act_vlan_ops, bind, true);
if (ret)
return ret;