diff --git a/Makefile b/Makefile
index 1cd3409..1adc097 100644
--- a/Makefile
+++ b/Makefile
@@ -10,7 +10,7 @@ grub_cfg := $(boot_src)/grub.cfg
 assembly_source_files := $(wildcard $(boot_src)/*.asm)
 assembly_object_files := $(patsubst $(boot_src)/%.asm, \
 	build/arch/$(arch)/boot/%.o, $(assembly_source_files))
-qemu_opts := -cdrom $(iso) -smp 2 -serial mon:stdio
+qemu_opts := -cdrom $(iso) -smp 4 -serial mon:stdio
 features := use_apic
 
 ifdef travis
diff --git a/src/arch/x86_64/driver/apic/lapic.rs b/src/arch/x86_64/driver/apic/lapic.rs
index 4331028..51f1d46 100644
--- a/src/arch/x86_64/driver/apic/lapic.rs
+++ b/src/arch/x86_64/driver/apic/lapic.rs
@@ -5,10 +5,15 @@ extern {
 	fn lapicstartap(apicid: u8, addr: u32);
 }
 
-pub fn init(lapic_addr: *const ()) {
-	debug!("WARNING: lapic::init use C lib");
+pub fn set_addr(lapic_addr: *const ()) {
 	unsafe {
 		lapic = lapic_addr;
+	}
+}
+
+pub fn init() {
+	debug!("WARNING: lapic::init use C lib");
+	unsafe {
 		lapicinit();
 	}
 	debug!("lapic: init end");
@@ -25,4 +30,10 @@ pub fn start_ap(apicid: u8, addr: u32) {
 	unsafe {
 		lapicstartap(apicid, addr);
 	}
+}
+
+pub fn lapic_id() -> u8 {
+	unsafe{
+		(*(lapic as *const u32).offset(0x0020/4) >> 24) as u8
+	}
 }
\ No newline at end of file
diff --git a/src/arch/x86_64/driver/apic/mod.rs b/src/arch/x86_64/driver/apic/mod.rs
index c03d30d..2ab9c5f 100644
--- a/src/arch/x86_64/driver/apic/mod.rs
+++ b/src/arch/x86_64/driver/apic/mod.rs
@@ -1,11 +1,16 @@
 pub use self::ioapic::IOAPIC;
-pub use self::lapic::{ack, start_ap};
+pub use self::lapic::{ack, start_ap, lapic_id};
 
 mod lapic;
 mod ioapic;
 
 pub fn init(lapic_addr: *const (), ioapic_id: u8) {
 	assert_has_not_been_called!("apic::init must be called only once");
-	self::lapic::init(lapic_addr);
+	self::lapic::set_addr(lapic_addr);
+	self::lapic::init();
 	self::ioapic::init(ioapic_id);
+}
+
+pub fn other_init() {
+	self::lapic::init();
 }
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index 82594d6..6d984c8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -85,7 +85,9 @@ pub extern "C" fn other_main() -> ! {
     arch::cpu::init();
     arch::gdt::init();
     arch::idt::init();
-    println!("Hello world! from AP!");
+    arch::driver::apic::other_init();
+    // FIXME: deadlock!
+    println!("Hello world! from CPU {}!", arch::driver::apic::lapic_id());
     unsafe{ let a = *(0xdeadbeaf as *const u8); } // Page fault
     loop {}
 }