netdev - RE: [E] Re: [PATCH net-next 1/2] net sched act_vlan: Change stats update to use per-core stats

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <10f80e225811433d89d58f139fba8026@OMZP1LUMXCA01.uswin.ad.vzwcorp.com>
Date:   Wed, 11 Oct 2017 12:35:50 +0000
From:   "Kurup, Manish B" <manish.kurup@...izon.com>
To:     Jamal Hadi Salim <jhs@...atatu.com>,
        Manish Kurup <kurup.manish@...il.com>,
        "xiyou.wangcong@...il.com" <xiyou.wangcong@...il.com>,
        "jiri@...nulli.us" <jiri@...nulli.us>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:     "aring@...atatu.com" <aring@...atatu.com>,
        "mrv@...atatu.com" <mrv@...atatu.com>
Subject: RE: [E] Re: [PATCH net-next 1/2] net sched act_vlan: Change stats
 update to use per-core stats

Hi Jamal, Yes, that's an indentation mismatch - I put in one tab too many. Shall fix before commit.

Thanks,

-Manish

-----Original Message-----
From: Jamal Hadi Salim [mailto:jhs@...atatu.com] 
Sent: Wednesday, October 11, 2017 8:28 AM
To: Manish Kurup; xiyou.wangcong@...il.com; jiri@...nulli.us; davem@...emloft.net; netdev@...r.kernel.org
Cc: aring@...atatu.com; mrv@...atatu.com; Kurup, Manish B
Subject: [E] Re: [PATCH net-next 1/2] net sched act_vlan: Change stats update to use per-core stats

minus lk

On 17-10-10 10:32 PM, Manish Kurup wrote:
> 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.
> 
> Signed-off-by: Manish Kurup <manish.kurup@...izon.com>
> ---
>   net/sched/act_vlan.c | 10 ++++++----
>   1 file changed, 6 insertions(+), 4 deletions(-)
> 
> diff --git a/net/sched/act_vlan.c b/net/sched/act_vlan.c index 
> 16eb067..14c262c 100644
> --- a/net/sched/act_vlan.c
> +++ b/net/sched/act_vlan.c
> @@ -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);
>

Indentation mismatch here?

Otherwise looks good to me.

Acked-by: Jamal Hadi Salim <jhs@...atatu.com>

cheers,
jamal