From mboxrd@z Thu Jan  1 00:00:00 1970
From: Steffen Klassert <steffen.klassert@secunet.com>
Subject: Re: [RFC PATCH 3/3] xfrm4: Invalidate all ipv4 routes on IPsec pmtu
 events
Date: Mon, 21 Jan 2013 13:04:12 +0100
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To: David Miller <davem@davemloft.net>
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On Fri, Jan 18, 2013 at 02:39:23PM -0500, David Miller wrote:
> From: Steffen Klassert <steffen.klassert@secunet.com>
> Date: Fri, 18 Jan 2013 09:16:01 +0100
> 
> > On IPsec pmtu events we can't access the transport headers of
> > the original packet, so we can't find the socket that sent
> > the packet. The only chance to notify the socket about the
> > pmtu change is to force a relookup for all routes. This
> > patch implenents this for the IPsec protocols.
> > 
> > Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
> 
> Expensive, but I really can't come up with a better idea.

I've just applied this to the ipsec tree.
I'll send a pull request tomorrow.