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

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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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Bug#1001001: linux-image-5.10.0-9-arm64: kernel BUG at include/linux/swapops.h:204! Diederik de Haas <didi.debian@cknow.org> - 2022-06-21 22:10 +0200
  Bug#1001001: linux-image-5.10.0-9-arm64: kernel BUG at include/linux/swapops.h:204! Paul Gevers <elbrus@debian.org> - 2022-06-21 22:40 +0200
    Bug#1001001: linux-image-5.10.0-9-arm64: kernel BUG at include/linux/swapops.h:204! Paul Gevers <elbrus@debian.org> - 2022-06-22 22:10 +0200
      Bug#1001001: linux-image-5.10.0-9-arm64: kernel BUG at include/linux/swapops.h:204! Diederik de Haas <didi.debian@cknow.org> - 2022-06-22 23:20 +0200
        Bug#1001001: linux-image-5.10.0-9-arm64: kernel BUG at include/linux/swapops.h:204! Diederik de Haas <didi.debian@cknow.org> - 2022-06-22 23:30 +0200
        Bug#1001001: linux-image-5.10.0-9-arm64: kernel BUG at include/linux/swapops.h:204! Paul Gevers <elbrus@debian.org> - 2022-06-23 10:50 +0200

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