diff --git a/kernel/listeners.c b/kernel/listeners.c
index c113852f..4948d4cd 100644
--- a/kernel/listeners.c
+++ b/kernel/listeners.c
@@ -6,9 +6,58 @@
 #include <aal/ikc.h>
 #include <ikc/master.h>
 
+static unsigned long read_tsc(void)
+{
+	unsigned int low, high;
+
+	asm volatile("rdtsc" : "=a"(low), "=d"(high));
+ 
+	return (low | ((unsigned long)high << 32));
+}
+
+
+void testmem(void *v, unsigned long size)
+{
+	unsigned long i, st, ed, s = 0;
+	unsigned long *p = v;
+
+	for (i = 0; i < size; i += 8) {
+		s += *(unsigned long *)((char *)p + i);
+	}
+
+	st = read_tsc();
+	for (i = 0; i < size; i += 64) {
+		s += *(unsigned long *)((char *)p + i);
+	}
+	ed = read_tsc();
+
+	kprintf("%ld, %ld\n", ed - st, s);
+}
+
+
 static int test_packet_handler(struct aal_ikc_channel_desc *c,
                                 void *__packet, void *__os)
 {
+	struct ikc_test_packet *packet = __packet;
+	struct ikc_test_packet p;
+	unsigned long a, pp, *v;
+	       
+	if (packet->msg == 0x11110011) {
+		kprintf("Test msg : %x, %x\n", packet->msg);
+		a = (unsigned long)packet->param1 << 12;
+		
+		pp = aal_mc_map_memory(NULL, a, 4 * 1024 * 1024);
+		v = aal_mc_map_virtual(pp, 4 * 1024,
+		                       PTATTR_UNCACHABLE);
+		
+		testmem(v, 4 * 1024 * 1024);
+
+		aal_mc_unmap_virtual(v, 4 * 1024);
+		aal_mc_unmap_memory(NULL, pp, 4 * 1024 * 1024);
+	} else if (packet->msg == 0x11110012) {
+		p.msg = 0x11110013;
+		aal_ikc_send(c, &p, 0);
+	}
 	
 	return 0;
 }
diff --git a/kernel/mem.c b/kernel/mem.c
index d1e8a166..6387d063 100644
--- a/kernel/mem.c
+++ b/kernel/mem.c
@@ -83,7 +83,7 @@ static struct aal_page_allocator_desc *vmap_allocator;
 static void virtual_allocator_init(void)
 {
 	vmap_allocator = aal_pagealloc_init(MAP_VMAP_START,
-	                                    MAP_VMAP_SIZE, LARGE_PAGE_SIZE);
+	                                    MAP_VMAP_SIZE, PAGE_SIZE);
 }
 
 void *aal_mc_map_virtual(unsigned long phys, int npages,
diff --git a/kernel/mikc.c b/kernel/mikc.c
index 701b1586..51f69552 100644
--- a/kernel/mikc.c
+++ b/kernel/mikc.c
@@ -32,3 +32,7 @@ static int arch_master_channel_packet_handler(struct aal_ikc_channel_desc *c,
 	return 0;
 }
 
+struct aal_ikc_channel_desc *aal_mc_get_master_channel(void)
+{
+	return &mchannel;
+}