lkml.org 
[lkml]   [2018]   [Oct]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectCAKE and r8169 cause panic on upload in v4.19
Hello.

I was excited regarding the fact that v4.19 introduced CAKE, so I've
deployed it on my home router.

I used this script of mine [1]:

# bufferbloat enp3s0.100 20 20

to do its job on the VLAN interface, where 20/20 ISP link is switched
from the home switch. Basically, it just follows [2] with simple
bandwidth restriction and egress mirroring using ifb.

Then I thought it would be nice to run speedtest-cli on one of the
computer in the home LAN, connected to this router. Download stage went
fine, but immediately after upload started I've got a panic on the
router: [3] (sorry, it is a photo, netconsole didn't work because, I
assume, the panic happened in the networking code). I rebooted the
router and tried once more, and got the same result, again during upload
stage. Then I rebooted again, replaced CAKE script with my former HTB
script, and after running speedtest-cli a couple of times there's no
panic.

Before running speedtest-cli I was using CAKE for a couple of days
without generating much traffic just fine. It seems it crashes only if
lots of traffic is generated with tools like this.

My sysctl: [4] and ethtool -k: [5]

So far, I've found something similar only here: [6] [7]. The common
thing is r8169 driver in use, so, maybe, it is a driver issue, and CAKE
is just happy to reveal it.

If it is something known, please point me to a possible fix. If it is
something new, I'm open to provide more info on your request, try
patches etc (as usual).

Thanks.

--
Oleksandr Natalenko (post-factum)

[1] https://gist.github.com/4b27c49a7f9b4d775e2e38ba23d3f13c
[2] https://www.bufferbloat.net/projects/codel/wiki/Cake
[3] https://bit.ly/2SlUl7R
[4] https://gist.github.com/pfactum/bdad2594b151578f460857cacd94c689
[5] https://gist.github.com/pfactum/cad2cc5d1512b31fbc76d821b3e63dbf
[6] https://boards.4chan.org/g/thread/68171835#p68188019
[7] https://i.4cdn.org/g/1540307271879.jpg

\
 
 \ /
  Last update: 2018-10-26 21:26    [W:0.073 / U:0.180 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site