diff --git a/arch/s390/mm/mem_detect.c b/arch/s390/mm/mem_detect.c
index d612cc3eec6a311e77cfa9a9659fe26308c6a7e6..0389d8d243589d929ff8be2eb273240abd7a8bc1 100644
--- a/arch/s390/mm/mem_detect.c
+++ b/arch/s390/mm/mem_detect.c
@@ -19,6 +19,8 @@
 
 static inline void memblock_physmem_add(phys_addr_t start, phys_addr_t size)
 {
+	memblock_dbg("memblock_physmem_add: [%#016llx-%#016llx]\n",
+		     start, start + size - 1);
 	memblock_add_range(&memblock.memory, start, size, 0, 0);
 	memblock_add_range(&memblock.physmem, start, size, 0, 0);
 }
@@ -55,4 +57,5 @@ void __init detect_memory_memblock(void)
 	memblock_set_bottom_up(false);
 	if (!max_physmem_end)
 		max_physmem_end = memblock_end_of_DRAM();
+	memblock_dump_all();
 }