Index: user/pho/stress2/misc/snap11.sh
===================================================================
--- user/pho/stress2/misc/snap11.sh	(nonexistent)
+++ user/pho/stress2/misc/snap11.sh	(revision 332009)
@@ -0,0 +1,78 @@
+#!/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.
+#
+# $FreeBSD$
+#
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+# Page fault seen in call from handle_workitem_freeblocks():
+# https://people.freebsd.org/~pho/stress/log/snap11.txt
+
+# Fixed by r321347-9.
+
+. ../default.cfg
+
+s=0
+log=/tmp/snap11.log
+mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
+[ -c /dev/md$mdstart ] &&  mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 2g -u $mdstart || exit 1
+bsdlabel -w md$mdstart auto
+newfs $newfs_flags md${mdstart}$part > /dev/null
+mount /dev/md${mdstart}$part $mntpoint
+
+export RUNDIR=$mntpoint/stressX
+export runRUNTIME=2m
+(cd ..; ./run.sh io.cfg) > /dev/null &
+
+while kill -0 $! 2>/dev/null; do
+	rm -f $mntpoint/.snap/stress2
+	mksnap_ffs $mntpoint $mntpoint/.snap/stress2 || continue
+
+	m2=$((mdstart + 1))
+	[ -c /dev/md$m2 ] && mdconfig -d -u $m2
+	mdconfig -a -t vnode -f $mntpoint/.snap/stress2 -u $m2 2>/dev/null
+	fsck -t ufs -y /dev/md$m2 2>&1 > $log 2>&1
+	egrep -v "WARNING|WRITE" $log | grep -q "[A-Z]" $log || { cat $log; s=1; }
+	mdconfig -d -u $m2
+done
+wait
+
+sleep 1
+tail -50 /var/log/messages | grep -m 1 "g_vfs_done():md5a" && s=1
+
+for i in `jot 6`; do
+	mount | grep -q "on $mntpoint " || break
+	umount $mntpoint && break || sleep 10
+done
+[ $i -eq 6 ] && exit 1
+fsck -t ufs -y /dev/md${mdstart}$part 2>&1 > $log 2>&1
+egrep -v "IS CLEAN" $log | grep -q "[A-Z]" $log || { cat $log; s=1; }
+mdconfig -d -u $mdstart
+rm -rf $log
+exit $s

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