Re: [PATCH 1/2] mm: remove CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE

David Hildenbrand (Arm)
2026-03-19T18:15:28Z

On 3/19/26 19:12, Zi Yan wrote:
> On 19 Mar 2026, at 14:08, David Hildenbrand (Arm) wrote:
>
>> On 3/19/26 16:24, Gregory Price wrote:
>>>
>>> HOTREMOVE has long been a thorn in my side, I appreciate you cleaning
>>> this up.
>>
>> On a long cardrive today I was wondering: do we still need a separate
>> MEMORY_HOTREMOVE
>
> You mean merge HOTREMOVE into HOTPLUG?

Yes, only have a single config.

> I wondered the same. Is there
> a reason to only have HOTPLUG without HOTREMOVE?
In the past some architectures (e.g., s390x) did not support HOTREMOVE.
Then it made sense. I'm not sure if someone would want to build a kernel
with HOTPLUG but not have the bit of overhead for unplug+migration.

So I would guess nothing major speaks against it.

--
Cheers,

David