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Date:	Wed, 17 Sep 2014 18:43:51 -0400
From:	Sowmini Varadhan <>
To:	David L Stevens <>
Cc:	David Miller <>,
Subject: Re: [PATCHv5 net-next 3/3] sunvnet: generate ICMP PTMUD messages for
 smaller port MTUs

On (09/17/14 16:49), David L Stevens wrote:
> +
> +			rt = ip_route_output_key(dev_net(dev), &fl4);
> +			if (!IS_ERR(rt)) {

As I've mentioned before, this layering violation makes me uneasy,
so its benefits should be evaluated carefully.  You will typically not be
able to find an rt for packets coming here from any application
that does not itself use/update the FIB, e.g., uspace based packet-injectors (PF_PACKET-based applications, intel dpdk-based uspace stacks etc.)


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