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

Wei Yang
2022-02-01T02:41:56Z

On Thu, Jan 27, 2022 at 09:53:02AM +0100, Michal Hocko wrote:
>From: Michal Hocko <mhocko@suse.com>
>
>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@redhat.com>
>Signed-off-by: Michal Hocko <mhocko@suse.com>

Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
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Wei Yang
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