On Mon, May 11, 2026 at 04:05:33PM +0200, David Hildenbrand (Arm) wrote:
> We removed the last user of NODE_INFO in commit 119c31caa59e ("mm/sparse:
> remove !CONFIG_SPARSEMEM_VMEMMAP leftovers for CONFIG_MEMORY_HOTPLUG").
>
> But it really was never used it besides for safety-checks ever since it was
> introduced in commit 04753278769f ("memory hotplug: register section/node
> id to free"), where we had the comment:
>
> 5) The node information like pgdat has similar issues. But, this
> will be able to be solved too by this.
> (Not implemented yet, but, remembering node id in the pages.)
>
> Of course, that never happened, and we are not planning on freeing the
> node data (pgdat/pglist_data), during memory hotunplug.
>
> So let's just stop marking the pgdat as NODE_INFO.
>
> Signed-off-by: David Hildenbrand (Arm) <[email protected]>
Reviewed-by: Mike Rapoport (Microsoft) <[email protected]>
> ---
> mm/bootmem_info.c | 9 +--------
> 1 file changed, 1 insertion(+), 8 deletions(-)
>
> diff --git a/mm/bootmem_info.c b/mm/bootmem_info.c
> index 74c1116626c8..cce1d560f094 100644
> --- a/mm/bootmem_info.c
> +++ b/mm/bootmem_info.c
> @@ -62,15 +62,8 @@ static void __init
> register_page_bootmem_info_section(unsigned long start_pfn)
>
> void __init register_page_bootmem_info_node(struct pglist_data *pgdat)
> {
> - unsigned long i, pfn, end_pfn, nr_pages;
> + unsigned long pfn, end_pfn;
> int node = pgdat->node_id;
> - struct page *page;
> -
> - nr_pages = PAGE_ALIGN(sizeof(struct pglist_data)) >> PAGE_SHIFT;
> - page = virt_to_page(pgdat);
> -
> - for (i = 0; i < nr_pages; i++, page++)
> - get_page_bootmem(node, page, NODE_INFO);
>
> pfn = pgdat->node_start_pfn;
> end_pfn = pgdat_end_pfn(pgdat);
>
> --
> 2.43.0
>
--
Sincerely yours,
Mike.
