From: Karel Zak <kzak@redhat.com>
Date: Thu, 17 Mar 2016 11:19:31 +0000 (+0100)
Subject: umount: add man page note that --force is not perfect
X-Git-Tag: v2.28-rc2~28
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dcc3b1fc2ed53b8b8e7636638ce905187089e9d5;p=thirdparty%2Futil-linux.git

umount: add man page note that --force is not perfect

Signed-off-by: Karel Zak <kzak@redhat.com>
---

diff --git a/sys-utils/umount.8 b/sys-utils/umount.8
index 8236ecddb0..2155f2ba52 100644
--- a/sys-utils/umount.8
+++ b/sys-utils/umount.8
@@ -94,6 +94,10 @@ option.
 .BR \-f , " \-\-force"
 Force an unmount (in case of an unreachable NFS system).  (Requires kernel
 2.1.116 or later.)
+
+Note that this option does not guarantee that umount command does not hang.
+It's strongly recommended to use absolute paths without symlinks to avoid
+unwanted readlink and stat syscalls on unreachable NFS in umount.
 .TP
 .BR \-i , " \-\-internal\-only"
 Do not call the \fB/sbin/umount.\fIfilesystem\fR helper even if it exists.