Subject: Re: [PATCH] ipv6: Limit mtu to 65572 bytes

From: YOSHIFUJI Hideaki <[email-masked]>
Date: Fri, 11 Apr 2014 12:30:18 +0900

Eric,

YOSHIFUJI Hideaki wrote:
> Eric Dumazet wrote:
>> From: Eric Dumazet <[email-masked]>
>>
>> Francois reported that setting big mtu on loopback device could prevent
>> tcp sessions making progress.
>>
>> We do not support (yet ?) IPv6 Jumbograms and cook corrupted packets.
>>
>> We must limit the IPv6 MTU to (65535 + 40) bytes in theory.
>>
>> Tested:
>>
>> ifconfig lo mtu 70000
>> netperf -H ::1
>>
>> Before patch : Throughput :   0.05 Mbits
>>
>> After patch : Throughput : 35484 Mbits
>>
>> Reported-by: Francois WELLENREITER <[email-masked]>
>> Signed-off-by: Eric Dumazet <[email-masked]>
> Acked-by: YOSHIFUJI Hideaki <[email-masked]>

Oops, you need to change the subject as well.
Otherwise, I am okay.

Thanks a lot.

--yoshfuji