No need to try migrate in current context since self migrate
will be handled by next vcpu after context switch.

Signed-off-by Kevin Tian <kevin.tian@intel.com>
diff -r e66f047bc97e xen/common/schedule.c
--- a/xen/common/schedule.c	Tue Jan 09 18:56:44 2007 -0800
+++ b/xen/common/schedule.c	Thu Jan 11 16:31:37 2007 +0800
@@ -243,7 +243,7 @@ int vcpu_set_affinity(struct vcpu *v, cp
 
     vcpu_schedule_unlock_irqrestore(v, flags);
 
-    if ( test_bit(_VCPUF_migrating, &v->vcpu_flags) )
+    if ( (v != current) && test_bit(_VCPUF_migrating, &v->vcpu_flags) )
     {
         vcpu_sleep_nosync(v);
         vcpu_migrate(v);