netdev - Re: Misuse of LRO, how widespread

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Date:	Mon, 06 Dec 2010 15:05:15 -0800
From:	Dimitris Michailidis <dm@...lsio.com>
To:	Stephen Hemminger <shemminger@...tta.com>
CC:	David Miller <davem@...emloft.net>,
	Olof Johansson <olof@...om.net>,
	Ben Hutchings <bhutchings@...arflare.com>,
	Divy Le Ray <divy@...lsio.com>, netdev@...r.kernel.org
Subject: Re: Misuse of LRO, how widespread

Stephen Hemminger wrote:
> On Mon, 06 Dec 2010 13:15:42 -0800
> Dimitris Michailidis <dm@...lsio.com> wrote:
> 
>> Stephen Hemminger wrote:
>>> I inspected all drivers in net-next to see which drivers are using
>>> LRO and which ones are broken. Most concerning is that Chelsio
>>> and Solarflare drivers ignore ETH_FLAG_LRO.
>>>
>>> The ones that are using LRO but allow disabling it:
>>>   qlcnic, netxen, mv643, s2io, myi10ge, bnx2x, ixgbe, vmxnet3
>>>
>>> One driver seems confused about LRO vs GRO:
>>>   mlx4 - comments about LRO and depends on LRO but driver is using GRO
>>>
>>> Drivers with not using ethtool interface to disable LRO:
>>>   pasemi_mac, sfc, ehea, cxgb3, cxgb4
>> cxgb4 uses GRO, not LRO.
> 
> Ok. but cxgb3 still uses LRO (or it least calls it lro).
> 

cxgb3 was the driver Herbert implemented GRO on I think, and he converted it 
to GRO.  It possibly has leftover LRO references as it was using LRO before.
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