Bug#993978: linux-image-5.10.0-8-arm64: host hangs after some time of use
Hi Paul,
On Thu, Sep 09, 2021 at 09:37:02AM +0200, Paul Gevers wrote:
> Package: src:linux
> Version: 5.10.46-4
> X-Debbugs-CC: debian-ci@lists.debian.org, aron@debian.org
> Severity: serious
> Justification: data loss
>
> Hi,
>
> As discussed over IRC, here is the bug report for one of the hanging
> arm64 hosts we have for ci.debian.net.
>
> Since the upgrade of our hosts to bullseye (days before the bullseye
> release) we have been experiencing random loss of access to our hosts.
> For the hosts that have some form of out-of-bound access, I tried to use
> that to see what's going on, but at AWS our account doesn't have the
> right permissions to use the serial port out-of-bound access and all
> other forms that I tried on all hosts that I have access to some for of
> out-of-bound access that didn't work.
>
> Since the bullseye release I've rebooted (externally triggered) already
> dozens of times and for those host that don't allow rebooting (AWS
> again) I had to reprovision the hosts.
>
> All the architectures (amd64, arm64, ppc64el and s390x) that we have
> experience these hangs. I'm absolutely not claiming that the root cause
> is the same, but on buster we didn't experience this (our s390x host
> never workerd on buster so I don't claim regression there), so there is
> a pattern. However, the symptoms don't look completely the same everywhere.
>
> On one of our arm64 hosts (we call ci-worker-armel-01) I found the
> attached logging as the final logs in the journal.
I suspect it's the same issue as fixed by
https://git.kernel.org/linus/ad9f151e560b016b6ad3280b48e42fa11e1a5440
upstream,
https://lore.kernel.org/lkml/000000000000ef07b205c3cb1234@google.com/
The fix landed in 5.13-rc7 (was backported to 5.12.13 as well, but not
5.10.y). It seems it requires more work to address it as well in
5.10.y.
Asked upstream in
https://lore.kernel.org/lkml/YTkj4xH2Ol075+Ge@eldamar.lan/
Regards,
Salvatore
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