netdev - Re: [net-next PATCH 1/3] ixgbe: enable HW RSC for 82599

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Message-Id: <20090428.175446.191949653.davem@davemloft.net>
Date:	Tue, 28 Apr 2009 17:54:46 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	jesse.brandeburg@...el.com
Cc:	jeffrey.t.kirsher@...el.com, netdev@...r.kernel.org,
	gospo@...hat.com, alexander.h.duyck@...el.com
Subject: Re: [net-next PATCH 1/3] ixgbe: enable HW RSC for 82599

From: "Brandeburg, Jesse" <jesse.brandeburg@...el.com>
Date: Tue, 28 Apr 2009 17:12:10 -0700 (Pacific Daylight Time)

> ah, you're right, but this features enables our new hardware that can do 
> LRO in hardware, and then GRO can work on top of it if necessary.  We 
> wanted some way to turn it off and overloaded the LRO flag to do so.

That ugly.  And the kernel is going to turn this off on you
when the user enables either forwarding or bridging.

> FYI This is not a TOE, it just recognizes a flow and will pack data frames 
> together in a list of descriptors, which the driver then hands to the 
> stack as a large receive.

I know what it is.
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