Index: user/pho/stress2/misc/swap5.sh
===================================================================
--- user/pho/stress2/misc/swap5.sh	(nonexistent)
+++ user/pho/stress2/misc/swap5.sh	(revision 358481)
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2019 Dell EMC Isilon
+#
+# 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.
+#
+# $FreeBSD$
+#
+
+# Test with out of swap space:
+# swp_pager_getswapspace(32): failed
+
+# "panic: freeing free block" sen with WiP kernel code:
+# https://people.freebsd.org/~pho/stress/log/dougm027.txt
+
+. ../default.cfg
+[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
+[ `sysctl -n hw.physmem` -lt $(( 5 * 1024 * 1024 * 1024)) ] && exit 0
+cc -o /tmp/swap5 -Wall -Wextra -O2 ../tools/swap.c || exit 1
+swapoff -a
+mdconfig -a -t malloc -o reserve -s 4g -u $mdstart || exit 1
+swapon /dev/md$mdstart || exit 1
+for i in `jot 3`; do
+	/tmp/swap5 -t 180 -p 85
+done
+swapoff /dev/md$mdstart
+mdconfig -d -u $mdstart
+swapon -a
+rm -f /tmp/swap5
+exit 0

Property changes on: user/pho/stress2/misc/swap5.sh
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