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

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Message-ID: <7608421F3572AB4292BB2532AE89D5658B0BAE9450@AVEXMB1.qlogic.org>
Date:	Tue, 5 Jan 2010 14:01:19 -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

> You should only do GRO.

Is there problem with stateless packet accumulation by
hardware / firmware when it helps to cut 20% cpu cycles
over GRO and helping some older machines to get line rates
at 10Gbps?

HW LRO is there already in many drivers under different
names (RSC, etc). The difference with netxen_nic and
qlcnic is that it takes care of allowing only local
flows not breaking across bridging or routing topology.

-Dhananjay
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