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

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Message-ID: <4F50CFE1.5040605@istac.de>
Date:	Fri, 02 Mar 2012 14:49:21 +0100
From:	Simeon Penev <spenev@...ac.de>
To:	Eric Dumazet <eric.dumazet@...il.com>
CC:	netdev@...r.kernel.org
Subject: Re: Patch for MTU in the routing table cache

Hi Eric,

no, i didn't. I'm new to the developer list and just wanted to post a 
patch proposition. I hoped that the maintainer of the code (probably 
Alan Cox) will decide whether to use it.

Best regards,
Simeon

On 03/02/2012 02:43 PM, Eric Dumazet wrote:
> 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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