Hello, Alex
The one way link bottleneck went away this night when I downgraded the sender
from 3.19 Vanilla Kernel to Debian wheezy backport Kernel
(3.16.7-ckt4-3~bpo70+1 )
So either I keep upgrading (as Eric Dumazet recommended) to maybe even Kernel
4-rc.foo.bar and continue introducing 3 new problems for every one I solve.
Or I try to solve my aufs problem, which was the reason for going vanilla,
within the debian stable domain.
I've learned the last weeks that things are moving quite turbulent at the
bleeding edge of linux. And I've learned to appreciate the work of the debian
people, to knit all this turbulence together to form a stable platform.
Wolfgang Rosner
---------- Weitergeleitete Nachricht ----------
Betreff: Re: One way TCP bottleneck over 6 x Gbit tecl aggregated link //
Kernel issue
Datum: Montag, 23. März 2015
Von: Wolfgang Rosner <wros...@tirnet.de>
An: Eric Dumazet <eric.duma...@gmail.com>
Hello, Eric,
It's the kernel, stupid me....
I can't belive it:
I just bootet my gatway into a debian kernel, and it works right away:
5.93 Gbits/sec over a single TCP connection :-)))
root@cruncher:~# cat /proc/version
Linux version 3.16.0-0.bpo.4-amd64 (debian-ker...@lists.debian.org) (gcc
version 4.6.3 (Debian 4.6.3-14) ) #1 SMP Debian 3.16.7-ckt4-3~bpo70+1
(2015-02-12)
as opposed to vanilla 3.19, which was running in the previous tests.
=====================
the sad thing is, that I had to remove the "udba=notify" option from my
aufs-layered nfsroots mimics.
So anytime I make config-Changes or add packages to the blade setup, I have to
run a script to remount all nfs roots, to get the blade known of the change.
(this was the reason why I went for 3.19)
======================
Therefore, I would be glad to get it working with 3.19, too.
And I hope that you, too, were eager to rule out the possibility of a
regression bug :-)
So, what could had have happend:
- regression bug somewhere in the kernel
- broken compatibility between 3.16 and 3.19 (maybe the iproute2 tools?)
- broken compatibility between Vanilla and Debian
- ????
Are you ready to assist me on this track?
Wolfgang Rosner
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-------------------------------------------------------
Wolfgang Rosner
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