netdev - Re: [PATCH net v2] net: neigh: fix multiple neigh timer scheduling

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Date:   Sun, 14 Jul 2019 12:15:58 -0700 (PDT)
From:   David Miller <davem@...emloft.net>
To:     dsahern@...il.com
Cc:     lorenzo.bianconi@...hat.com, netdev@...r.kernel.org,
        marek@...udflare.com
Subject: Re: [PATCH net v2] net: neigh: fix multiple neigh timer scheduling

From: David Ahern <dsahern@...il.com>
Date: Sun, 14 Jul 2019 07:58:19 -0600

> On 7/14/19 2:45 AM, Lorenzo Bianconi wrote:
>> @@ -1124,7 +1125,9 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb)
>>  
>>  			atomic_set(&neigh->probes,
>>  				   NEIGH_VAR(neigh->parms, UCAST_PROBES));
>> -			neigh->nud_state     = NUD_INCOMPLETE;
>> +			if (check_timer)
>> +				neigh_del_timer(neigh);
> 
> Why not just always call neigh_del_timer and avoid the check_timer flag?
> Let the NUD_IN_TIMER flag handle whether anything needs to be done.

Agreed.