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Date:	Wed, 16 Jul 2008 20:50:59 -0700 (PDT)
From:	David Miller <>
Subject: Re: [PATCH] core: add stat to track unresolved discards in
 neighbor cache

From: Neil Horman <>
Date: Tue, 15 Jul 2008 13:37:31 -0400

> in __neigh_event_send, if we have a neighbour entry which is in NUD_INCOMPLETE
> state, we enqueue any outbound frames to that neighbour to the neighbours
> arp_queue, which is default capped to a length of 3 skbs.  If that queue exceeds
> its set length, it will drop an skb on the queue to enqueue the newly arrived
> skb.  This results in a drop for which we have no statistics incremented.  This
> patch adds an unresolved_discards stat to /proc/net/stat/ndisc_cache to track
> these lost frames.
> Signed-off-by: Neil Horman <>

Applied, thanks a lot Neil.
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