In case of NODE_NOT_IN_PAGE_FLAGS is set, we store section's node id in section_to_node_table[]. While for hot-add memory, this is missed. Without this information, page_to_nid() may not give the right node id. BTW, current online_pages works because it leverages nid in memory_block. But the granularity of node id should be mem_section wide. Signed-off-by: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx> Reviewed-by: Oscar Salvador <osalvador@xxxxxxx> Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> Reviewed-by: Anshuman Khandual <anshuman.khandual@xxxxxxx> --- v2: * specify the case NODE_NOT_IN_PAGE_FLAGS is effected. * list one of the victim page_to_nid() --- mm/sparse.c | 1 + 1 file changed, 1 insertion(+) diff --git a/mm/sparse.c b/mm/sparse.c index 4012d7f50010..48fa16038cf5 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -733,6 +733,7 @@ int __meminit sparse_add_one_section(int nid, unsigned long start_pfn, */ page_init_poison(memmap, sizeof(struct page) * PAGES_PER_SECTION); + set_section_nid(section_nr, nid); section_mark_present(ms); sparse_init_one_section(ms, section_nr, memmap, usemap); -- 2.19.1
