netdev - Re: [PATCH net-next 3/4] tunneling: Add generic UDP-Tunnel TSO.

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Message-ID: <CALnjE+oUTOCM=gMTVKRkx40z_dFvG6_t+rzf26WgFa8F+fOsUw@mail.gmail.com>
Date:	Fri, 15 Feb 2013 17:39:50 -0800
From:	Pravin Shelar <pshelar@...ira.com>
To:	Eric Dumazet <eric.dumazet@...il.com>
Cc:	netdev@...r.kernel.org, edumazet@...gle.com, jesse@...ira.com,
	stephen@...workplumber.org
Subject: Re: [PATCH net-next 3/4] tunneling: Add generic UDP-Tunnel TSO.

On Fri, Feb 15, 2013 at 5:34 PM, Eric Dumazet <eric.dumazet@...il.com> wrote:
> On Fri, 2013-02-15 at 17:06 -0800, Pravin B Shelar wrote:
>
>> +     /* segment inner packet. */
>> +     segs = skb_mac_gso_segment(skb, skb->dev->hw_enc_features);
>> +     if (!segs || IS_ERR(segs))
>> +             goto out;
>> +
>
> It seems that hw_enc_features is 0 for all devices.
>
right.

> We should at least inherit NETIF_F_SG
>
ok.

> (and presumably netdev_fix_features() should not remove NETIF_F_SG if
> CSUM is not supported, as we now copy the data _if_ needed in
> skb_checksum_help())
>
yes, that is useful. I have separate patch to kill this dependency, I
will sent it.

Thanks.
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