ACK: [PATCH 0/4] [focal/impish linux-aws] AWS: Hibernate resume crashes when platform changes
stefan.bader at canonical.com
Tue Mar 22 07:52:26 UTC 2022
On 19.03.22 17:10, Tim Gardner wrote:
> BugLink: https://bugs.launchpad.net/bugs/1965002
> Even though these are all cherry-picks, there is enough fuzz that 'git am' won't do
> the job whereas 'git cherry-pick' does. Hence the 4 patches that are nearly identical.
> SRU Justification
> At present, if a virt instance is hibernated and restarted in a different environment,
> the instance will crash. We have seen situations where customers have to enable support
> cases to recover an instance. The proposed patch is supposed to enable the kernel to
> detect the change and reboot the instance instead of crashing. In the ACPI specification;
> there is a 'hardware signature' field in the ACPI tables, and the OS can reboot cleanly
> if/when that signature changes, instead of attempting the resume and crashing.
> commit f6c46b1d62f8ffbf2cf6eb43ab0d277bd3f7e948 linux-next
> [Test Case]
> Hibernate an AWS instance, resume on a different platform. Positive test results from Amazon engineers.
> [Where things could go wrong]
> Resume currently crashes when a hibernated instance is migrated to a new machine. It can't
> get much worse, unless the initial hibernate fails.
> [Other Info]
> SF: #00330794
Acked-by: Stefan Bader <stefan.bader at canonical.com>
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