--- /usr/share/man/man5/rc.conf.5.orig	2015-12-02 15:59:11.000000000 +0100
+++ /usr/share/man/man5/rc.conf.5	2016-03-21 21:49:06.000000000 +0100
@@ -331,6 +331,25 @@
 Boolean value.
 Remove block-type swap devices at shutdown time.
 Useful if swapping onto RAIDframe devices.
+.It Sy swapoff_umount
+.Dq "auto"
+or
+.Dq "manual" .
+Before removing block-type swap devices, it is wise to unmount tmpfs filesystems to avoid having to swap their contents back into RAM.
+By default 
+.Dq ( "auto" )
+all tmpfs filesystems that contain no device nodes are unmounted.
+Set to 
+.Dq "manual"
+to explicitly specify which filesystems to unmount before removing swap.
+.It Sy swapoff_umount_fs
+A space-separated list of absolute paths to tmpfs mount points.
+If 
+.Sy swapoff_umount
+is set to
+.Dq "manual" ,
+these tmpfs filesystems will be forcibly unmounted before removing block-type
+swap devices.
 .El
 .Ss Block device subsystems
 .Bl -tag -width net_interfaces