From: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
To: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Hannes Frederic Sowa <hannes@stressinduktion.org>,
David Miller <davem@davemloft.net>,
Francois WELLENREITER <f.wellenreiter@gmail.com>,
netdev@vger.kernel.org,
YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Subject: Re: [PATCH] ipv6: Limit mtu to 65572 bytes
Date: Fri, 11 Apr 2014 12:26:53 +0900 [thread overview]
Message-ID: <534760FD.9050306@linux-ipv6.org> (raw)
In-Reply-To: <1397186427.16584.86.camel@edumazet-glaptop2.roam.corp.google.com>
Eric Dumazet wrote:
> From: Eric Dumazet <edumazet@google.com>
>
> 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 <f.wellenreiter@gmail.com>
> Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
--yoshfuji
next prev parent reply other threads:[~2014-04-11 3:26 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-04-09 19:42 Does IPv6 support Jumbograms ? Francois WELLENREITER
2014-04-09 20:35 ` Hannes Frederic Sowa
2014-04-09 21:41 ` Eric Dumazet
2014-04-09 22:35 ` Hannes Frederic Sowa
2014-04-10 0:36 ` Eric Dumazet
2014-04-10 13:28 ` Hannes Frederic Sowa
2014-04-10 14:01 ` Eric Dumazet
2014-04-10 23:54 ` Hannes Frederic Sowa
2014-04-11 0:40 ` Eric Dumazet
2014-04-11 1:42 ` [PATCH] ipv6: Limit mtu to 65572 bytes Eric Dumazet
2014-04-11 1:58 ` Eric Dumazet
2014-04-11 2:30 ` YOSHIFUJI Hideaki
2014-04-11 2:57 ` Hannes Frederic Sowa
2014-04-11 3:14 ` Eric Dumazet
2014-04-11 8:40 ` David Laight
2014-04-11 8:34 ` David Laight
2014-04-11 3:20 ` Eric Dumazet
2014-04-11 3:26 ` YOSHIFUJI Hideaki [this message]
2014-04-11 3:30 ` YOSHIFUJI Hideaki
2014-04-11 3:30 ` David Miller
2014-04-11 4:20 ` Eric Dumazet
2014-04-11 4:23 ` [PATCH v3] ipv6: Limit mtu to 65575 bytes Eric Dumazet
2014-04-11 13:22 ` Hannes Frederic Sowa
2014-04-11 15:26 ` Eric Dumazet
2014-04-11 20:48 ` David Miller
2014-04-11 2:44 ` [PATCH] ipv6: Limit mtu to 65572 bytes Hannes Frederic Sowa
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