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Date: Sun, 14 Jul 2019 07:58:19 -0600 From: David Ahern <dsahern@...il.com> To: Lorenzo Bianconi <lorenzo.bianconi@...hat.com>, davem@...emloft.net Cc: netdev@...r.kernel.org, marek@...udflare.com Subject: Re: [PATCH net v2] net: neigh: fix multiple neigh timer scheduling 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. > + neigh->nud_state = NUD_INCOMPLETE; > neigh->updated = now; > next = now + max(NEIGH_VAR(neigh->parms, RETRANS_TIME), > HZ/2); > @@ -1140,6 +1143,8 @@ int __neigh_event_send(struct neighbour *neigh, struct sk_buff *skb) > } > } else if (neigh->nud_state & NUD_STALE) { > neigh_dbg(2, "neigh %p is delayed\n", neigh); > + if (check_timer) > + neigh_del_timer(neigh); > neigh->nud_state = NUD_DELAY; > neigh->updated = jiffies; > neigh_add_timer(neigh, jiffies +
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