netdev - Re: [patch net-next RFC 0/4] introduce infrastructure for support of switch chip datapath

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Message-ID: <53334874.8000004@mojatatu.com>
Date:	Wed, 26 Mar 2014 17:36:52 -0400
From:	Jamal Hadi Salim <jhs@...atatu.com>
To:	"John W. Linville" <linville@...driver.com>,
	Thomas Graf <tgraf@...g.ch>
CC:	Neil Horman <nhorman@...driver.com>, Jiri Pirko <jiri@...nulli.us>,
	Florian Fainelli <f.fainelli@...il.com>,
	netdev <netdev@...r.kernel.org>,
	David Miller <davem@...emloft.net>, andy@...yhouse.net,
	dborkman@...hat.com, ogerlitz@...lanox.com, jesse@...ira.com,
	pshelar@...ira.com, azhou@...ira.com,
	Ben Hutchings <ben@...adent.org.uk>,
	Stephen Hemminger <stephen@...workplumber.org>,
	jeffrey.t.kirsher@...el.com, vyasevic <vyasevic@...hat.com>,
	Cong Wang <xiyou.wangcong@...il.com>,
	John Fastabend <john.r.fastabend@...el.com>,
	Eric Dumazet <edumazet@...gle.com>,
	Scott Feldman <sfeldma@...ulusnetworks.com>,
	Lennert Buytenhek <buytenh@...tstofly.org>
Subject: Re: [patch net-next RFC 0/4] introduce infrastructure for support
 of switch chip datapath

On 03/26/14 11:22, John W. Linville wrote:

> This part makes sense to me -- use the hardware forwarding offloads if
> they are available, but fall back to software for sake of flexibility.
> It gives the admin enough rope to shoot himself in the foot...
>

This should be left up to policy. Maybe a sysctl? Example:
I should be able to choose whether i want to _only_
use the L3 table in hardware and not in software for certain
traffic which may require lower latency.

cheers,
jamal

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