Re: [PATCH 2/5] ipv4: Kill ip_rt_frag_needed().

From: Steffen Klassert <steffen.klassert@secunet.com>
Date: Thu, 14 Jun 2012 07:35:29 +0200

With your patch applied, we stop setting the DF bit after we
received a 'need to frag' ICMP message, but we don't fragment. We
send the packets out unfragmented. Before we removed
ip_rt_frag_needed(), we did the fragmentation according to the pmtu
informations we got from the icmp message. Now the router with the
low mtu has to do the fragmentation.

Ok, then if we want to do the fragmentation locally then we have to
consider my initial patch which updates the PMTU in raw_err().

Did you test that?  I mean specifically, this patch:

http://marc.info/?l=linux-netdev&m=133945597319917&w=2

If it works for you, I will try to extend it to the other datagram
cases.

Thanks.