Index: user/pho/stress2/misc/umount2.sh
===================================================================
--- user/pho/stress2/misc/umount2.sh	(nonexistent)
+++ user/pho/stress2/misc/umount2.sh	(revision 314388)
@@ -0,0 +1,92 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2017 Dell EMC Isilon
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+# 1. Redistributions of source code must retain the above copyright
+#    notice, this list of conditions and the following disclaimer.
+# 2. Redistributions in binary form must reproduce the above copyright
+#    notice, this list of conditions and the following disclaimer in the
+#    documentation and/or other materials provided with the distribution.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+# SUCH DAMAGE.
+#
+# $FreeBSD$
+#
+
+# # ps -l
+# UID   PID  PPID CPU PRI NI  VSZ  RSS MWCHAN STAT TT     TIME COMMAND
+#   0 72280     1   0  20  0 5992 1768 mntref D     0- 0:03.20 umount /mnt
+
+# https://people.freebsd.org/~pho/stress/log/kostik990.txt
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+[ `swapinfo | wc -l` -eq 1 ] && exit 0
+
+. ../default.cfg
+
+mount | grep -q "on $mntpoint " && umount -f $mntpoint
+[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 5g -u $mdstart
+bsdlabel -w md$mdstart auto
+newfs $newfs_flags md${mdstart}$part > /dev/null
+mount /dev/md${mdstart}$part $mntpoint
+chmod 777 $mntpoint
+
+size=$((`sysctl -n hw.physmem` / 1024 / 1024))
+[ $size -gt $((4 * 1024)) ] &&
+    echo "RAM should be capped to 4GB for this test."
+
+export RUNDIR=$mntpoint/stressX
+export runRUNTIME=5m
+export TESTPROGS="
+testcases/symlink/symlink
+testcases/openat/openat
+testcases/fts/fts
+testcases/lockf/lockf
+"
+
+export ftsINCARNATIONS=192
+export lockfINCARNATIONS=132
+export openatINCARNATIONS=218
+export symlinkINCARNATIONS=201
+
+export ftsLOAD=100
+export lockfLOAD=100
+export openatLOAD=100
+export symlinkLOAD=100
+
+export ftsHOG=1
+export lockfHOG=1
+export openatHOG=1
+export symlinkHOG=1
+
+su $testuser -c 'cd ..; ./testcases/run/run $TESTPROGS'
+
+sync
+umount $mntpoint &
+sleep 5
+kill -0 $! 2>/dev/null && { ps -lp$! | grep mntref && exit 1; }
+wait
+
+for i in `jot 6`; do
+	mount | grep -q "on $mntpoint " || break
+	umount $mntpoint && break || sleep 10
+done
+[ $i -eq 6 ] && exit 1
+mdconfig -d -u $mdstart
+exit 0

Property changes on: user/pho/stress2/misc/umount2.sh
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+*
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