netdev - Re: [PATCH net] ipv6: do not overwrite inetpeer metrics prematurely

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Date:	Sat, 8 Mar 2014 09:34:26 +0100
From:	Hannes Frederic Sowa <hannes@...essinduktion.org>
To:	Michal Kubecek <mkubecek@...e.cz>
Cc:	David Miller <davem@...emloft.net>, netdev@...r.kernel.org,
	kuznet@....inr.ac.ru, jmorris@...ei.org, yoshfuji@...ux-ipv6.org,
	kaber@...sh.net
Subject: Re: [PATCH net] ipv6: do not overwrite inetpeer metrics prematurely

On Fri, Mar 07, 2014 at 10:38:42PM +0100, Michal Kubecek wrote:
> Today I also realized another problem with current code: if we already
> have inetpeer with metrics and use "ip route change" with metrics, e.g.
> 
>   ip route add fec0::1 dev eth0 rto_min 1000
>   ip route change fec0::1 dev eth0 hoplimit 10

Hmm, those routes seem to not have RTF_NONEXTHOP (no gateway). I am
a bit concerend that rt6_select returns !RTF_CACHE node and we do end
up doing the inetpeer lookup on every lookup on them. Maybe you have
already investigated?

Thanks,

  Hannes

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