netdev - Re: [PATCH v2 net-next-2.6] ifb: add performance flags

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Message-Id: <20110103.114033.28807428.davem@davemloft.net>
Date:	Mon, 03 Jan 2011 11:40:33 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	jarkao2@...il.com
Cc:	eric.dumazet@...il.com, xiaosuo@...il.com, pstaszewski@...are.pl,
	netdev@...r.kernel.org
Subject: Re: [PATCH v2 net-next-2.6] ifb: add performance flags

From: Jarek Poplawski <jarkao2@...il.com>
Date: Mon, 3 Jan 2011 20:37:03 +0100

> On Sun, Jan 02, 2011 at 09:24:36PM +0100, Eric Dumazet wrote:
>> Le mercredi 29 décembre 2010 ?? 00:07 +0100, Jarek Poplawski a écrit :
>> 
>> > Ingress is before vlans handler so these features and the
>> > NETIF_F_HW_VLAN_TX flag seem useful for ifb considering
>> > dev_hard_start_xmit() checks.
>> 
>> OK, here is v2 of the patch then, thanks everybody.
>> 
>> 
>> [PATCH v2 net-next-2.6] ifb: add performance flags
>> 
>> IFB can use the full set of features flags (NETIF_F_SG |
>> NETIF_F_FRAGLIST | NETIF_F_TSO | NETIF_F_NO_CSUM | NETIF_F_HIGHDMA) to
>> avoid unnecessary split of some packets (GRO for example)
>> 
>> Changli suggested to also set vlan_features,
> 
> He also suggested more GSO flags of which especially NETIF_F_TSO6
> seems interesting (wrt GRO)?

I think at least TSO6 would very much be appropriate here.
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