Re: [PATCH 3/6] mm, memory_hotplug: drop arch_free_nodedata

[Oscar Salvador]

On 2022-01-27 09:53, Michal Hocko wrote:
> From: Michal Hocko <mhocko@xxxxxxxx>
>
> Prior to "mm: handle uninitialized numa nodes gracefully" memory 
> hotplug
> used to allocate pgdat when memory has been added to a node
> (hotadd_init_pgdat) arch_free_nodedata has been only used in the
> failure path because once the pgdat is exported (to be visible
> by NODA_DATA(nid)) it cannot really be freed because there is no
> synchronization available for that.
>
> pgdat is allocated for each possible nodes now so the memory hotplug
> doesn't need to do the ever use arch_free_nodedata so drop it.
>
> This patch doesn't introduce any functional change.
>
> Acked-by: Rafael Aquini <raquini@xxxxxxxxxx>
> Signed-off-by: Michal Hocko <mhocko@xxxxxxxx>

Reviewed-by: Oscar Salvador <osalvador@xxxxxxx>

--
Oscar Salvador
SUSE Labs