--- wikisrc/ports/xen/howto.mdwn	2021/03/03 15:09:26	1.196
+++ wikisrc/ports/xen/howto.mdwn	2021/03/03 23:17:59	1.197
@@ -412,8 +412,13 @@ file by "memory = N" (in megabytes).  In
 sum of the the memory allocated to the dom0 and all domUs must be less
 than the available memory.
 
-Xen also provides a "balloon" driver, which can be used to let domains
-use more memory temporarily.
+## Balloon driver
+
+Xen provides a `balloon` driver, which can be used to let domains use
+more memory temporarily.
+
+\todo Explain how to set up a aystem to use the balloon scheme in a
+useful manner.
 
 ## Virtual disks