Index: vm_map_protect.9
===================================================================
--- vm_map_protect.9
+++ vm_map_protect.9
@@ -96,6 +96,10 @@
 for an entry within the range,
 .Dv KERN_PROTECTION_FAILURE
 is returned.
+If copy-on-write mapping is transitioned from read-only to read-write,
+and too little swap space is available for backing the copied pages,
+.Dv KERN_RESOURCE_SHORTAGE
+is returned.
 .Sh SEE ALSO
 .Xr vm_map 9
 .Sh AUTHORS