On February 18, 2020 7:35:31 PM GMT+01:00, "Toke Høiland-Jørgensen" <toke@toke.dk> wrote:

Rich Brown <richb.hanover@gmail.com> writes:

 Folks,

 I was running OpenWrt 19.07-rc2 on my Archer C7v2, and experienced a
 potentially-repeatable crash under heavy network traffic load.

 I was uploading several long videos to Youtube (> 5GBytes each) and
 watching Netflix on my 7mbps/768kbps DSL connection. Things were
 working fine (latency remained acceptable - YAY SQM!) My upstream pipe
 (slow as it is) was totally filled by the three competing uploads, and
 Netflix was doing its best to show me the West Wing.

 A couple times during the evening, the Netflix stream just crapped out
 and I lost the connection. (Infinite buffering message on-screen,
 couldn't get to Google, etc. The LuCI GUI showed uptime of a minute or
 so, and then things were fine again.)

 I now have OpenWrt 19.07.1 installed, and have a little bandwidth for
 repeating the experiment.

 What debugging information should I turn on/look for in case this
 happens again? Thanks.

If the box reboots, this sounds like a kernel oops. In which case, we'd
really need a kernel stack dump to debug it. Which I'm not sure there's
a good way to get on OpenWrt without attaching a serial console :(

Unless of course you can find a reliable way to reproduce it without too
much delay, in which case someone with a serial console can take a look,
I guess :)

-Toke
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