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Bug#1001001: linux-image-5.10.0-9-arm64: kernel BUG at include/linux/swapops.h:204!



Hi Diederik,

On 21-06-2022 23:19, Diederik de Haas wrote:
I think that the install logs aren't that important (anymore) as the issue/
symptoms appear to be the same:
- some swap action resulting in some failure
- CPU gets stuck
- watchdog triggers a reboot

If the reboot would actually happen/finish, I wouldn't have problems of the hanging host. The issues I spotted required a manual reboot (and that's why I spotted them).

How is swap configured on these devices?

https://salsa.debian.org/ci-team/debian-ci-config/-/blob/master/cookbooks/basics/default.rb#L3 until line 11

Yeah, I _assumed_ as such, but assumptions can be dangerous ;-)

Total ACK.

Normally I scroll (hard) by the hardware listings as that rarely says anything
to me. And I did that before too, but just now I made an important discovery.

I *assumed* it was running on arm64 (native) hardware and was about to ask
specifics about it and then I noticed this:
Host bridge [0600]: Red Hat, Inc. QEMU PCIe Host bridge [1b36:0008]

Qemu. Quite likely unrelated, but a while back I had an issue with qemu in
building arm64 images: https://bugs.debian.org/988174

hmm, OK, right (I forgot that I knew this).

I think it would be useful to know which qemu version(s) were used.

Is there any way to know from inside the VM?

If the issue does occur again, I think it would be useful to bring 'upstream'
into the conversation. They likely can bring much more useful input into this
then (f.e.) I could. Also, if upstream is made aware there is an issue (even
infrequent), then they can make the most informed choice what to do with it.

Ack.

Paul

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