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From: Eric Dumazet <eric.dumazet@gmail.com>
Subject: Re: [PATCH v2 net-next] tcp: avoid tx starvation by SYNACK packets
Date: Wed, 27 Jun 2012 10:02:17 +0200
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To: Jesper Dangaard Brouer <brouer@redhat.com>
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On Wed, 2012-06-27 at 09:54 +0200, Jesper Dangaard Brouer wrote:

> Well, that would lead to parallel SYN processing, wouldn't it?

I think we already discussed of the current issues of current code.

Telling people to spread SYN to several cpus is a good way to have a
freeze in case of synflood, because 15 cpus are busy looping while one
is doing progress.

Thats why Intel felt the need of a hardware filter to direct all SYN
packets on a single queue.