netdev - Re: [PATCH 2/5] ipv4: Kill ip_rt_frag

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Date:	Wed, 13 Jun 2012 22:42:03 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	steffen.klassert@...unet.com
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH 2/5] ipv4: Kill ip_rt_frag_needed().

From: Steffen Klassert <steffen.klassert@...unet.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.
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