netdev - Re: [PATCH net-next v11 4/4] net sched actions: add time filter for action dumping

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Message-ID: <20170725113452.GB3186@nanopsycho>
Date:   Tue, 25 Jul 2017 13:34:52 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     Jamal Hadi Salim <jhs@...atatu.com>
Cc:     davem@...emloft.net, netdev@...r.kernel.org,
        xiyou.wangcong@...il.com, dsahern@...il.com,
        eric.dumazet@...il.com, mrv@...atatu.com,
        simon.horman@...ronome.com, alex.aring@...il.com
Subject: Re: [PATCH net-next v11 4/4] net sched actions: add time filter for
 action dumping

Tue, Jul 25, 2017 at 01:27:03PM CEST, jhs@...atatu.com wrote:
>On 17-07-24 07:34 AM, Jiri Pirko wrote:
>> Mon, Jul 24, 2017 at 03:35:46AM CEST, jhs@...atatu.com wrote:
>> > From: Jamal Hadi Salim <jhs@...atatu.com>
>
>> 
>> > @@ -128,6 +129,11 @@ static int tcf_dump_walker(struct tcf_hashinfo *hinfo, struct sk_buff *skb,
>> > 			if (index < s_i)
>> > 				continue;
>> > 
>> > +			if (jiffy_since &&
>> > +			    time_after(jiffy_since,
>> > +				       (unsigned long)p->tcfa_tm.lastuse))
>> 
>> You don't need to check jiffy_since==0. Also, nicer  ^^ this with a space :)
>> 
>
>Assuming that time_after() would work fine for jiffy_since being zero,
>but:
>wouldnt it be more efficient to just not call time_after() altogether?

time_after is pretty trivial. But your call.


>
>> Other than this, looks fine.
>
>Ok, please no more changes - I am exhausted ;-> So speak for this
>update or send patches afterwards if you dont like something.
>
>cheers,
>jamal
>