netdev - Re: Patch for MTU in the routing table cache

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Message-ID: <1330695791.2469.17.camel@edumazet-laptop>
Date:	Fri, 02 Mar 2012 05:43:11 -0800
From:	Eric Dumazet <eric.dumazet@...il.com>
To:	Simeon Penev <spenev@...ac.de>
Cc:	netdev@...r.kernel.org
Subject: Re: Patch for MTU in the routing table cache

Le vendredi 02 mars 2012 à 14:13 +0100, Simeon Penev a écrit :
> Hi,
> 
> after testing the new 3.2 kernel and the new route caching code, i've 
> found a bug in net/ipv4/route.c. The route cache does not detect changes 
> to the MTU of the interface. Therefore IP fragmentation will happen with 
> false MTU. Please see attached the proposed patch.
> 

Hi

Did you test this patch doesnt break things like

ip ro add 96.17.148.89 via 10.0.0.1 mtu 800

(and keep eth0 mtu being standard mtu)



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