netdev - Re: [E1000-devel] [PATCH] net: enable GRO by default for vlan devices

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Date:	Wed, 15 Sep 2010 22:51:46 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	shemminger@...tta.com
Cc:	eric.dumazet@...il.com, bphilips@...e.de,
	e1000-devel@...ts.sourceforge.net, bruce.w.allan@...el.com,
	jesse.brandeburg@...el.com, john.ronciak@...el.com,
	jeffrey.t.kirsher@...el.com, netdev@...r.kernel.org,
	bhutchings@...arflare.com
Subject: Re: [E1000-devel] [PATCH] net: enable GRO by default for vlan
 devices

From: Stephen Hemminger <shemminger@...tta.com>
Date: Wed, 15 Sep 2010 18:16:16 -0700

> On Thu, 16 Sep 2010 00:28:11 +0200
> Eric Dumazet <eric.dumazet@...il.com> wrote:
> 
>> BTW, we have a similar problem for bonding ( GRO is disabled )
>> 
>> # ethtool -K bond0 gro off
>> # ethtool -K bond0 gro on
>> Cannot set device GRO settings: Invalid argument
>> 
>> Same for vlans on top of bond0
> 
> Bridge has same problem as well.

Looking this over it should be a simple matter of:

1) Adding the generic get/set gro ethtool ops to bonding
   and bridge device ops.

2) Set NETIF_F_GRO in bond/bridge device flags

3) Maybe some minor fiddling with netdev_increment_features
   and the flag macros it uses?

Patches welcome :-)
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