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Date: Fri, 11 Apr 2014 12:30:18 +0900 From: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org> To: Eric Dumazet <eric.dumazet@...il.com> CC: Hannes Frederic Sowa <hannes@...essinduktion.org>, David Miller <davem@...emloft.net>, Francois WELLENREITER <f.wellenreiter@...il.com>, netdev@...r.kernel.org, YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org> Subject: Re: [PATCH] ipv6: Limit mtu to 65572 bytes Eric, YOSHIFUJI Hideaki wrote: > Eric Dumazet wrote: >> From: Eric Dumazet <edumazet@...gle.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@...il.com> >> Signed-off-by: Eric Dumazet <edumazet@...gle.com> > Acked-by: YOSHIFUJI Hideaki <yoshfuji@...ux-ipv6.org> Oops, you need to change the subject as well. Otherwise, I am okay. Thanks a lot. --yoshfuji -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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