From mboxrd@z Thu Jan  1 00:00:00 1970
From: Or Gerlitz <ogerlitz@mellanox.com>
Subject: Re: [PATCH net-next 3/9] IB/ipoib: Add support for acting as VIF
Date: Wed, 11 Jul 2012 11:05:12 +0300
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Cc: <davem@davemloft.net>, <roland@kernel.org>,
	<netdev@vger.kernel.org>, <ali@mellanox.com>,
	<sean.hefty@intel.com>, Erez Shitrit <erezsh@mellanox.co.il>
To: Eric Dumazet <eric.dumazet@gmail.com>
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On 7/10/2012 3:26 PM, Eric Dumazet wrote:
> On Tue, 2012-07-10 at 15:16 +0300, Or Gerlitz wrote:
>> The IPoIB code checks the VIF private flag on the RX path, and accoriding
>> to the value of the flag prepares the skb CB data, etc.
>>
>
> skb->cb[] can be destroyed in netif_receive_skb() / __netif_receive_skb()
>
> #ifdef CONFIG_NET_CLS_ACT
> 	skb = handle_ing(skb, &pt_prev, &ret, orig_dev);
> 	...
> #endif

Eric,

Can you elaborate a little further? we're not sure to see where 
skb->cb[] is touched on the flow
you pointed to.

Or.