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Message-ID: <1397079665.16584.17.camel@edumazet-glaptop2.roam.corp.google.com> Date: Wed, 09 Apr 2014 14:41:05 -0700 From: Eric Dumazet <eric.dumazet@...il.com> To: Francois WELLENREITER <f.wellenreiter@...il.com> Cc: netdev@...r.kernel.org Subject: Re: Does IPv6 support Jumbograms ? On Wed, 2014-04-09 at 21:42 +0200, Francois WELLENREITER wrote: > Hi there, > > I've been recently running performance tests with the loopback interface > increasing the MTU over the 65535 byte limit. > I was really surprised to see that a simple scp onto the ::1 address > systematically blocked after transferring about 2,4 MB. > My interpretation of this behavior is that the current IPv6 kernel layer > does not support Jumbograms at all. Am I wrong ? > If that's not the case, what could then the right interpretation of this > issue ? > And whenever I'm right, is there any plan to support this feature in a > near future ? What do you mean by blocked ? Please give more details (kernel version, exact mtu...), because it should not happen ! # ifconfig lo mtu 100000 # scp -6 vmlinux edumazet@...-localhost:/tmp Password: vmlinux 100% 24MB 23.5MB/s 00:00 # ls -l /tmp/vmlinux -rwxr-xr-x 1 edumazet eng 24668915 Apr 9 14:37 /tmp/vmlinux -- 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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