From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Miller <davem@davemloft.net>
Subject: Re: [PATCH 11/16] ipv4: Cache input routes in fib_info nexthops.
Date: Mon, 23 Jul 2012 14:06:57 -0700 (PDT)
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From: David Miller <davem@davemloft.net>
Date: Mon, 23 Jul 2012 12:58:37 -0700 (PDT)

> The only time skb->dev->ifindex can change from rt->rt_iif is when we
> demux a tunnel, but at that point we would first reinject and do
> another route lookup, at which point rt->rt_iif would match again.
> 
> And this is the intended semantic of this field anyways.

Ok Julian, you probably already say the DIRECTSRC patches and upcoming
are two patches to take care of the rt->rt_iif thing.