diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c
index 955cf6b68a3a..96679018e7fb 100644
--- a/arch/powerpc/mm/book3s64/radix_pgtable.c
+++ b/arch/powerpc/mm/book3s64/radix_pgtable.c
@@ -1033,6 +1033,7 @@ static pte_t * __meminit radix__vmemmap_pte_populate(pmd_t *pmdp, unsigned long
 				p = vmemmap_alloc_block_buf(PAGE_SIZE, node, NULL);
 			if (!p)
 				return NULL;
+			pr_debug("PAGE_SIZE vmemmap mapping\n");
 		} else {
 			/*
 			 * When a PTE/PMD entry is freed from the init_mm
@@ -1045,6 +1046,7 @@ static pte_t * __meminit radix__vmemmap_pte_populate(pmd_t *pmdp, unsigned long
 			 */
 			get_page(reuse);
 			p = page_to_virt(reuse);
+			pr_debug("Tail page reuse vmemmap mapping\n");
 		}
 
 		VM_BUG_ON(!PAGE_ALIGNED(addr));
@@ -1154,6 +1156,7 @@ int __meminit radix__vmemmap_populate(unsigned long start, unsigned long end, in
 			p = vmemmap_alloc_block_buf(PMD_SIZE, node, altmap);
 			if (p) {
 				vmemmap_set_pmd(pmd, p, node, addr, next);
+				pr_debug("PMD_SIZE vmemmap mapping\n");
 				continue;
 			} else if (altmap) {
 				/*