Index: xen-4.14.0-testing/tools/examples/xl.conf
===================================================================
--- xen-4.14.0-testing.orig/tools/examples/xl.conf
+++ xen-4.14.0-testing/tools/examples/xl.conf
@@ -7,7 +7,7 @@
 # Control whether dom0 is ballooned down when xen doesn't have enough
 # free memory to create a domain.  "auto" means only balloon if dom0
 # starts with all the host's memory.
-#autoballoon="auto"
+autoballoon="off"
 
 # full path of the lockfile used by xl during domain creation
 #lockfile="/var/lock/xl"