netdev - Re: [Patch net-next] net: add doc for ip_early

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Message-Id: <20130611.023400.1305427475808933449.davem@davemloft.net>
Date:	Tue, 11 Jun 2013 02:34:00 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	amwang@...hat.com
Cc:	netdev@...r.kernel.org, edumazet@...gle.com,
	alexander.h.duyck@...el.com
Subject: Re: [Patch net-next] net: add doc for ip_early_demux sysctl

From: Cong Wang <amwang@...hat.com>
Date: Thu,  6 Jun 2013 13:10:23 +0800

> +	It may add an additional cost to routing that reduces overall
> +	throughput, in such case you should disable it.

I would state this as "additional cost for pure routing workloads" to
emphasize the fact that the potential bad case is when we are not
delivering to a local socket.

The way you have it worded, it makes it sound like route lookups (in
general) will perform more poorly.  This is simply not the case.
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