Re: [PATCH 1/2] mm/memory_hotplug: allow marking of memory sections as hotpluggable

David Hildenbrand
2020-10-17T09:36:51Z

On 17.10.20 10:26, Mike Rapoport wrote:
> On Fri, Oct 16, 2020 at 07:02:23PM -0700, Sudarshan Rajagopalan wrote:
>> Certain architectures such as arm64 doesn't allow boot memory to be
>> offlined and removed. Distinguish certain memory sections as
>> "hotpluggable" which can be marked by module drivers stating to memory
>> hotplug layer that these sections can be offlined and then removed.
>
> I don't quite follow why marking sections as hotpluggable or not should
> be done by a device driver. Can you describe in more details your
> use-case and why there is a need to add a flag to the memory map?
>

This seems to be related to

https://lkml.kernel.org/r/de8388df2fbc5a6a33aab95831ba7db4@codeaurora.org

After reading how the driver is trying to abuse memory hot(un)plug
infrastructure, my tentative

Nacked-by: David Hildenbrand <david@redhat.com>

--
Thanks,

David / dhildenb