This patch adds an arg_check into the set_vcpus code in xm, so that we

don't output a stack trace if <2 arguments are passed.

Signed-off-by: Dan Smith <danms@us.ibm.com>

tools/python/xen/xm/main.py

@@ -460,6 +460,8 @@ def xm_mem_set(args):
     server.xend_domain_mem_target_set(dom, mem_target)
     
 def xm_set_vcpus(args):
+    arg_check(args, 2, "set-vcpus")
+    
     from xen.xend.XendClient import server
     server.xend_domain_set_vcpus(args[0], int(args[1]))