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

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Message-Id: <20090608.142927.122160930.davem@davemloft.net>
Date:	Mon, 08 Jun 2009 14:29:27 -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: Mon, 8 Jun 2009 11:20:31 -0400 (EDT)

> On Fri, 5 Jun 2009, David Miller wrote:
> 
>> It's fundamentally wrong.  You need some limit there.
> 
> Maybe we need a different approach but (since we are at the point of
> talking about categorical fundamentally wrong statements) its
> fundamentally wrong if the IPoIB layer works differently from a regular
> Ethernet NIC. They should work in the same way.

This I agree on.  When a multicast group is joined, the IPoIB layer
should block in some way until the subscription is fully available
for use.
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