The patch titled
Subject: mm/sparse.c: set section nid for hot-add memory
has been added to the -mm tree. Its filename is
mm-sparse-set-section-nid-for-hot-add-memory.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-sparse-set-section-nid-for-hot-add-memory.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-sparse-set-section-nid-for-hot-add-memory.patch
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------------------------------------------------------
From: Wei Yang <richardw.yang@xxxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx
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>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/sparse.c | 1 +
1 file changed, 1 insertion(+)
--- a/mm/sparse.c~mm-sparse-set-section-nid-for-hot-add-memory
+++ a/mm/sparse.c
@@ -731,6 +731,7 @@ int __meminit sparse_add_one_section(int
*/
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);
_
Patches currently in -mm which might be from richardw.yang@xxxxxxxxxxxxxxx are
mm-sparse-set-section-nid-for-hot-add-memory.patch
