netdev - Re: [PATCH: 2.6.13-15-SMP 3/3] network: concurrently run softirq network code on SMP

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Message-Id: <20070920.104614.58454013.davem@davemloft.net>
Date:	Thu, 20 Sep 2007 10:46:14 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	johny@...mco.com.cn
Cc:	netdev@...r.kernel.org, kuznet@....inr.ac.ru, pekkas@...core.fi,
	jmorris@...ei.org, kaber@...eworks.de
Subject: Re: [PATCH: 2.6.13-15-SMP 3/3] network: concurrently run softirq
 network code on SMP

The whole reason the queues are per-cpu is so that we do not
have to touch remote processor state nor use locks of any
kind whatsoever.

With multi-queue networking cards becoming more and more
available, which will split up the packet workload in
hardware across all available cpus, there is less and less
reason to make a patch like this one.

We've known about this issue for ages, and if we felt it
was appropriate to make this change, we would have done
so years ago.
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