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SubjectRe: [PATCH v5 2/2] drivers/virt: vmgenid: add vm generation id driver
> +The ``vmgenid`` driver uses ACPI events to be notified by hardware
> +changes to the 128-bit Vm Gen Id UUID.

That's ok, problem is ACPI event processing is asynchronous.
What we need is thus to flush out ACPI events whenever userspace
does a read, otherwise the value it gets will be stale.

--
MST

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