Re: [PATCH v2 2/3] mm/memory_hotplug: Introduce MHP_NO_FIRMWARE_MEMMAP

Dave Hansen
2020-04-30T16:04:26Z

On 4/30/20 8:52 AM, David Hildenbrand wrote:
>> Justifying behavior by documentation that does not consider memory
>> hotplug is bad thinking.
> Are you maybe confusing this patch series with the arm64 approach? This
> is not about ordinary hotplugged DIMMs.
>
> I'd love to get Dan's, Dave's and Michal's opinion.

The impact on kexec from the DAX "kmem" driver's use of hotplug was
inadvertent and unfortunate.

The problem statement and solution seem pretty sane to me.