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Debugging a hung task problem
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ElDavo
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Joined: 23 Aug 2015
Posts: 12

PostPosted: Sun Mar 24, 2019 9:23 pm    Post subject: Debugging a hung task problem Reply with quote

Hi guys,
My laptop, a Lenovo Yoga 2 11', sometimes just freezes up completely. Sysrq doesn't answer either.
To understand whats going on, I've compiled it with "panic on hung tasks" and debug info. I also emerged crash and configured a dump-RAM system.
Now, I have a good RAM dump and crash is working, but I have no idea of what to do.
Could you please help me to understand as much as possible? I would like to report this bug to upstream Linux.
Thank you very much.
Here we go with all the infos: (I have no idea if I can make attachments here so I will post pastebins)
I'm using UEFI mode with single root btrfs partition.
There are no steps to reproduce as it's completely random. I have no way to trigger it if not using the system for a long time. Sometimes days can go along without nothing happening, sometimes (like the dump I've collected) it just needs one hour to crash.
I use gentoo-sources and no patches.
emerge --info : https://pastebin.com/g8GXB9id
crash summary: https://pastebin.com/hCkdf6qr
dmesg of crashed kernel: https://pastebin.com/vfaCqBEh
normal dmesg: https://pastebin.com/1rVzfcN2
kernel configuration: https://pastebin.com/f1afgw03
crash's bt -a: https://pastebin.com/uVUXPyYE
crash's ps:https://pastebin.com/g4e7sXUB

Of course I'm available to give you more info if you ask me or even to arrange an ssh session if you want to play around with the dump.
EDIT:This started since I got gentoo (when 4.14 was around I guess)
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