Re: [PATCH] mm: don't rely on system state to detect hot-plug operations

From: David Hildenbrand
Date: Thu Sep 10 2020 - 10:35:48 EST

>> Also, under QEMU, just do a reboot with hotplugged memory and you're in
>> the very same situation.
> OK, I didn't know that. I thought the memory would be presented as a
> normal memory after reboot. Thanks for the clarification.

That's one of the cases where QEMU differs to actual hardware - it's not
added to e820, so ACPI always probes+detects+adds DIMMs during boot.

Some people (me :)) consider that a feature and not a BUG.


David / dhildenb