1 files changed, 10 insertions, 0 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index d313737..61f14a1 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -949,6 +949,16 @@ static int unmap_and_move_huge_page(new_page_t get_new_page,
 	struct page *new_hpage = get_new_page(hpage, private, &result);
 	struct anon_vma *anon_vma = NULL;
 
+	/*
+	 * Movability of hugepages depends on architectures and hugepage size.
+	 * This check is necessary because some callers of hugepage migration
+	 * like soft offline and memory hotremove don't walk through page
+	 * tables or check whether the hugepage is pmd-based or not before
+	 * kicking migration.
+	 */
+	if (!hugepage_migration_support(page_hstate(hpage)))
+		return -ENOSYS;
+
 	if (!new_hpage)
 		return -ENOMEM;