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From: Brad Davis <brd@FreeBSD.org>
Date: Wed, 20 Dec 2017 15:21:29 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r327025 - head/sbin/reboot
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Author: brd (doc,ports committer)
Date: Wed Dec 20 15:21:29 2017
New Revision: 327025
URL: https://svnweb.freebsd.org/changeset/base/327025

Log:
  Save others some forehead damange by noting that -r require tmpfs.
  
  Reviewed by:	bapt

Modified:
  head/sbin/reboot/reboot.8

Modified: head/sbin/reboot/reboot.8
==============================================================================
--- head/sbin/reboot/reboot.8	Wed Dec 20 14:26:54 2017	(r327024)
+++ head/sbin/reboot/reboot.8	Wed Dec 20 15:21:29 2017	(r327025)
@@ -28,7 +28,7 @@
 .\"	@(#)reboot.8	8.1 (Berkeley) 6/9/93
 .\" $FreeBSD$
 .\"
-.Dd October 23, 2017
+.Dd December 20, 2017
 .Dt REBOOT 8
 .Os
 .Sh NAME
@@ -142,6 +142,9 @@ After changing vfs.root.mountfrom with
 .Xr kenv 1 ,
 .Nm Fl r
 can be used to change the root filesystem while preserving kernel state.
+This requires the
+.Xr tmpfs 5
+kernel module to be loaded.
 .El
 .Pp
 The