[src/trunk]: src/sbin/mount stress more that discard is experimental, and exp...

[jdolecek <jdolecek%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/d3c38217ae8a
branches:  trunk
changeset: 348836:d3c38217ae8a
user:      jdolecek <jdolecek%NetBSD.org@localhost>
date:      Thu Nov 10 22:28:00 2016 +0000

description:
stress more that discard is experimental, and explain why; also note that
it's not compatible with log

diffstat:

 sbin/mount/mount.8 |  11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)

diffs (32 lines):

diff -r 292ace5d711a -r d3c38217ae8a sbin/mount/mount.8
--- a/sbin/mount/mount.8        Thu Nov 10 22:19:23 2016 +0000
+++ b/sbin/mount/mount.8        Thu Nov 10 22:28:00 2016 +0000
@@ -1,4 +1,4 @@
-.\"    $NetBSD: mount.8,v 1.81 2016/09/12 00:25:23 sevan Exp $
+.\"    $NetBSD: mount.8,v 1.82 2016/11/10 22:28:00 jdolecek Exp $
 .\"
 .\" Copyright (c) 1980, 1989, 1991, 1993
 .\"    The Regents of the University of California.  All rights reserved.
@@ -29,7 +29,7 @@
 .\"
 .\"     @(#)mount.8    8.8 (Berkeley) 6/16/94
 .\"
-.Dd September 12, 2016
+.Dd November 10, 2016
 .Dt MOUNT 8
 .Os
 .Sh NAME
@@ -196,7 +196,12 @@
 mode.
 .It Cm discard
 Use DISCARD/TRIM commands if disk and driver support it.
-EXPERIMENTAL!
+.Pp
+.Em EXPERIMENTAL
+- negatively influences filesystem performance,
+causes free block map inconsistency on unclean shutdown,
+and is incompatible with
+.Cm log .
 .It Cm extattr
 Enable extended attributes, if the filesystem supports them and
 does not enable them by default.