[PATCH v7 7/7] mm/memory_hotplug: Enable runtime update of memmap_on_memory parameter

Michal Hocko mhocko at suse.com
Mon Aug 7 22:27:09 AEST 2023

On Sat 05-08-23 19:54:23, Aneesh Kumar K V wrote:
> Do you see a need for firmware-managed memory to be hotplugged in with
> different memory block sizes?

In short. Yes. Slightly longer, a fixed size memory block semantic is
just standing in the way and I would even argue it is actively harmful.
Just have a look at ridicously small memory blocks on ppc. I do
understand that it makes some sense to be aligned to the memory model
(so sparsmem section aligned). In an ideal world, memory hotplug v2
interface (if we ever go that path) should be physical memory range based.
Michal Hocko

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