[Bloat] Debugging a crash

[Sebastian Moeller]

Have a look at https://forum.openwrt.org/t/crashlog-retrieval-mips/19731. It seems cat /sys/kernel/debug/crashlog after a reboot caused by a crash mightcreveal some more details.

Good luck
        Sebastian

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