diff --git kernel/mem.c kernel/mem.c
index 62cb206..5bfb6d6 100644
--- kernel/mem.c
+++ kernel/mem.c
@@ -542,6 +542,15 @@ static void reserve_pages(struct ihk_page_allocator_desc *pa_allocator,
 	ihk_pagealloc_reserve(pa_allocator, start, end);
 }
 
+#if 1   /* Trace for DEBUG */
+char *mempolicy [] = {
+	"MPOL_DEFAULT",
+	"MPOL_PREFERRED",
+	"MPOL_BIND",
+	"MPOL_INTERLEAVE"
+};
+#endif
+
 extern int cpu_local_var_initialized;
 static void *mckernel_allocate_aligned_pages_node(int npages, int p2align,
 		ihk_mc_ap_flag flag, int pref_node, int is_user, uintptr_t virt_addr)
@@ -585,6 +594,23 @@ static void *mckernel_allocate_aligned_pages_node(int npages, int p2align,
 			}
 		}
 
+#if 1	/* Trace for DEBUG */
+		if (!((range_policy_iter) && (range_policy_iter->numa_mem_policy != MPOL_DEFAULT))) {
+			if ((range_policy_iter) && (range_policy_iter->numa_mem_policy == MPOL_DEFAULT)) {
+				if (chk_shm == 0) {
+					kprintf("%s[%d]: addr(0x%016lx) policy(%s) <NUMA node policy>\n"
+						,__FUNCTION__ ,__LINE__ ,virt_addr ,mempolicy[(range_policy_iter->numa_mem_policy & 0x3)]);
+				}
+			} else {
+				if ((cpu_local_var(current)->vm->numa_mem_policy == MPOL_DEFAULT) && (virt_addr != -1)) {
+					if (virt_addr) {
+						kprintf("%s[%d]: addr(0x%016lx) policy(%s) <default policy>\n"
+							,__FUNCTION__ ,__LINE__ ,virt_addr ,mempolicy[(cpu_local_var(current)->vm->numa_mem_policy & 0x3)]);
+					}
+				}
+			}
+		}
+#endif
 
 		if ((!((range_policy_iter) && (range_policy_iter->numa_mem_policy != MPOL_DEFAULT))) && (chk_shm == 0))
 			goto distance_based;
@@ -647,10 +673,30 @@ static void *mckernel_allocate_aligned_pages_node(int npages, int p2align,
 				chk_shm = 1;
 			} else {
 				numa_mem_policy = range_policy_iter->numa_mem_policy;
+
+#if 1	/* Trace for DEBUG */
+				kprintf("%s[%d]: addr(0x%016lx) policy(%s) <NUMA node policy>\n"
+					,__FUNCTION__ ,__LINE__ ,virt_addr ,mempolicy[(numa_mem_policy & 0x3)]);
+#endif
+
 			}
 		}
 	}
 
+#if 1	/* Trace for DEBUG */
+	if (numa_mem_policy == -1) {
+		if (chk_shm == 1) {
+			kprintf("%s[%d]: addr(0x%016lx) policy(%s) <default policy:Mapping of MAP_SHARED>\n"
+				,__FUNCTION__ ,__LINE__ ,virt_addr ,mempolicy[(cpu_local_var(current)->vm->numa_mem_policy & 0x3)]);
+		} else {
+			if (virt_addr) {
+				kprintf("%s[%d]: addr(0x%016lx) policy(%s) <default policy>\n"
+					,__FUNCTION__ ,__LINE__ ,virt_addr ,mempolicy[(cpu_local_var(current)->vm->numa_mem_policy & 0x3)]);
+			}
+		}
+	}
+#endif
+
 	if (numa_mem_policy == -1)
 		numa_mem_policy = cpu_local_var(current)->vm->numa_mem_policy;