From: Baoquan He <bhe@xxxxxxxxxx> Subject: mm/sparse.c: allocate memmap preferring the given node When allocating memmap for hot added memory with the classic sparse, the specified 'nid' is ignored in populate_section_memmap(). While in allocating memmap for the classic sparse during boot, the node given by 'nid' is preferred. And VMEMMAP prefers the node of 'nid' in both boot stage and memory hot adding. So seems no reason to not respect the node of 'nid' for the classic sparse when hot adding memory. Use kvmalloc_node instead to use the passed in 'nid'. Link: http://lkml.kernel.org/r/20200316125625.GH3486@MiWiFi-R3L-srv Signed-off-by: Baoquan He <bhe@xxxxxxxxxx> Acked-by: Michal Hocko <mhocko@xxxxxxxx> Reviewed-by: Matthew Wilcox (Oracle) <willy@xxxxxxxxxxxxx> Acked-by: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx> Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> Reviewed-by: Wei Yang <richard.weiyang@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/sparse.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/sparse.c~mm-sparsec-allocate-memmap-preferring-the-given-node +++ a/mm/sparse.c @@ -664,8 +664,8 @@ static void free_map_bootmem(struct page struct page * __meminit populate_section_memmap(unsigned long pfn, unsigned long nr_pages, int nid, struct vmem_altmap *altmap) { - return kvmalloc(array_size(sizeof(struct page), - PAGES_PER_SECTION), GFP_KERNEL); + return kvmalloc_node(array_size(sizeof(struct page), + PAGES_PER_SECTION), GFP_KERNEL, nid); } static void depopulate_section_memmap(unsigned long pfn, unsigned long nr_pages, _
