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

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Date:	Thu, 16 Sep 2010 00:28:11 +0200
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Brandon Philips <bphilips@...e.de>
Cc:	Ben Hutchings <bhutchings@...arflare.com>,
	David Miller <davem@...emloft.net>,
	jeffrey.t.kirsher@...el.com, jesse.brandeburg@...el.com,
	bruce.w.allan@...el.com, alexander.h.duyck@...el.com,
	peter.p.waskiewicz.jr@...el.com, john.ronciak@...el.com,
	donald.c.skidmore@...el.com, netdev@...r.kernel.org,
	e1000-devel@...ts.sourceforge.net
Subject: Re: [PATCH] net: enable GRO by default for vlan devices

Le jeudi 16 septembre 2010 à 00:03 +0200, Eric Dumazet a écrit :
> Le mercredi 15 septembre 2010 à 12:24 -0700, Brandon Philips a écrit :
> > Currently vlan devices don't have GRO by default as none of the Ethernet
> > drivers add NETIF_F_GRO to their vlan_features.
> > 
> > As GRO is a software feature add GRO to dev->vlan_features in
> > register_netdevice() and let vlan_dev_init() take care that it gets
> > enabled only when dev->features has NETIF_F_GRO too.
> > 
> > Signed-off-by: Brandon Philips <bphilips@...e.de>
> > 
> 
> Acked-by: Eric Dumazet <eric.dumazet@...il.com>
> 

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



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