netdev - Re: IPoIB: Fix multicast packet drops before join is complete

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Date:	Thu, 04 Jun 2009 15:30:57 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	cl@...ux-foundation.org
Cc:	rdreier@...co.com, netdev@...r.kernel.org, yosefe@...taire.COM
Subject: Re: IPoIB: Fix multicast packet drops before join is complete

From: Christoph Lameter <cl@...ux-foundation.org>
Date: Thu, 4 Jun 2009 11:52:48 -0400 (EDT)

> On Wed, 3 Jun 2009, David Miller wrote:
> 
>> We don't do this for ARP, for example.  We have a 3 packet limit just
>> like IPoIB implements for multicast here.
> 
> ARP is a management protocol with specific semantics. Socket protocols are
> dealing with streams of datagrams.

Go look at what the ARP backlog queue actually does, then come back to
this conversation (hint: it's not a backlog for ARP packets, it's
a backlog for packets waiting for ARP to resolve).

Thank you.
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