From 26f26bedab337c9c7e1e55b21949a3e2e0d62840 Mon Sep 17 00:00:00 2001 From: Wei Yang Date: Thu, 18 Jul 2019 15:57:21 -0700 Subject: mm/sparse.c: set section nid for hot-add memory 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. Link: http://lkml.kernel.org/r/20190618005537.18878-1-richardw.yang@linux.intel.com Signed-off-by: Wei Yang Reviewed-by: Oscar Salvador Reviewed-by: David Hildenbrand Reviewed-by: Anshuman Khandual Acked-by: Michal Hocko Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- mm/sparse.c | 1 + 1 file changed, 1 insertion(+) (limited to 'mm/sparse.c') diff --git a/mm/sparse.c b/mm/sparse.c index 1552c855d62a..fe44b2d3bd7e 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -731,6 +731,7 @@ 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); -- cgit v1.2.3-59-g8ed1b