netdev - RE: [PATCH NEXT 0/2] qlcnic: Add Qlogic 1/10Gb Ethernet driver for CNA devices

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Date:	Tue, 5 Jan 2010 17:56:00 -0800
From:	Dhananjay Phadke <dhananjay.phadke@...gic.com>
To:	David Miller <davem@...emloft.net>
CC:	"shemminger@...tta.com" <shemminger@...tta.com>,
	Amit Salecha <amit.salecha@...gic.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
Subject: RE: [PATCH NEXT 0/2] qlcnic: Add Qlogic 1/10Gb Ethernet driver for
 CNA devices

> But HW LRO is not bridge/forwarding/etc. agnostic because it loses
> information.
> 
> As soon as I turn on forwarding to make a NAT box or whatever, all of
> the hw LRO gets turned off and we're back to square one for local
> connections on the machine.

I won't defend other vendors' implementation. Even if LRO was
not turned off for bridge/forwarding, we still wouldn't accumulate
those remote flows because the dest IP address is not configured in
firmware in our case. This is the reason why we have a inet
notification listener (to tell firmware about local addresses).

-Dhananjay

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