Fw: [Bug 74851] New: Using kernel 3.14.x causes NAT Clients having very slow upload (< 5kb/s) or timeouts

Fw: [Bug 74851] New: Using kernel 3.14.x causes NAT Clients having very slow upload (< 5kb/s) or timeouts

[Stephen Hemminger]

Begin forwarded message:

Date: Fri, 25 Apr 2014 11:29:02 -0700
From: "bugzilla-daemon@bugzilla.kernel.org" <bugzilla-daemon@bugzilla.kernel.org>
To: "stephen@networkplumber.org" <stephen@networkplumber.org>
Subject: [Bug 74851] New: Using kernel 3.14.x causes NAT Clients having very slow upload (< 5kb/s) or timeouts


https://bugzilla.kernel.org/show_bug.cgi?id=74851

            Bug ID: 74851
           Summary: Using kernel 3.14.x causes NAT Clients having very
                    slow upload (< 5kb/s) or timeouts
           Product: Networking
           Version: 2.5
    Kernel Version: 3.14.1
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: IPV4
          Assignee: shemminger@linux-foundation.org
          Reporter: ck@conrad-kostecki.de
        Regression: No

Hi!
I've recently upgraded on my router-gentoo box my kernel from 3.13.x to 3.14.1.
The kernel boots fine, but it causes, that every client behind NAT cannot
upload anymore fast. The upload starts very fast (~ 400kb/s) for about 0.5 sec
and drops immediately to about 2-5kb/s. There are also sometime timeouts after
a few more seconds. Only the upload seems to be affected, while downloads is
always full speed and works fine. Uploading directly on the gentoo-router box
works always fine with the new kernel!

I've tried gentoo-sources and vanilla-sources. Both gave me the same result. I
don't know, how to debug this problem. Which information do you need?

Conrad

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Gentoo Linux
Kernel 3.15.6 / 3.14.1
iptables v1.4.21
4x Intel 82574L (Soekris net6501-70 platform)

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