Index: user/pho/stress2/misc/swapoff3.sh
===================================================================
--- user/pho/stress2/misc/swapoff3.sh	(nonexistent)
+++ user/pho/stress2/misc/swapoff3.sh	(revision 358063)
@@ -0,0 +1,146 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2020 Mark Johnston
+#
+# 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.
+#
+# $FreeBSD$
+#
+
+# "panic: Swapdev not found" seen:
+# https://people.freebsd.org/~pho/stress/log/swapoff3.txt
+# Fixed by r358024-6
+
+. ../default.cfg
+[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
+dir=`dirname $diskimage`
+[ `df -k $dir | tail -1 | awk '{print $4}'` -lt \
+    $((20 * 1024 * 1024)) ] &&
+    { echo "Need 20GB on $dir"; exit 0; }
+
+cat > /tmp/swapoff3.c <<EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/sysctl.h>
+
+#include <assert.h>
+#include <err.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+int
+main(void)
+{
+	char *addr, *naddr, *res;
+	size_t i, len, swap, vsz;
+	u_int free;
+
+	vsz = sizeof(free);
+	if (sysctlbyname("vm.stats.vm.v_free_count", &free, &vsz, NULL, 0) != 0)
+		err(1, "sysctl(vm.stats.vm.v_free_count)");
+	vsz = sizeof(swap);
+	if (sysctlbyname("vm.swap_total", &swap, &vsz, NULL, 0) != 0)
+		err(1, "sysctl(vm.swap_total)");
+
+	len = (size_t)free * PAGE_SIZE + swap / 4;
+	addr = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE,
+	    -1, 0);
+	if (addr == MAP_FAILED)
+		err(1, "mmap");
+
+	res = malloc(howmany(len, PAGE_SIZE));
+	if (res == NULL)
+		err(1, "malloc");
+
+	for (i = 0; i < len; i += PAGE_SIZE)
+		addr[i] = 1;
+
+	for (;;) {
+		if (mincore(addr, len, res) != 0)
+			err(1, "mincore");
+		for (i = 0; i < howmany(len, PAGE_SIZE); i++)
+			if ((res[i] & MINCORE_INCORE) == 0) {
+				naddr = addr + i * PAGE_SIZE;
+				if (munmap(naddr, PAGE_SIZE) != 0)
+					err(1, "munmap");
+				if (mmap(naddr, PAGE_SIZE,
+				    PROT_READ | PROT_WRITE,
+				    MAP_ANON | MAP_PRIVATE | MAP_FIXED,
+				    -1, 0) == MAP_FAILED)
+					err(1, "mmap");
+				assert(*naddr == 0);
+				*naddr = 1;
+			}
+	}
+
+	return (0);
+}
+EOF
+mycc -o /tmp/swapoff3 -Wall -Wextra -O2 -g /tmp/swapoff3.c || exit
+
+set -e
+md1=$mdstart
+md2=$((md1 + 1))
+[ `sysctl -n vm.swap_total` -gt 0 ] && { swapoff -a > /dev/null; off=1; }
+truncate -s 10G $dir/swap1
+mdconfig -a -t vnode -f $dir/swap1 -u $md1
+swapon /dev/md$md1
+truncate -s 10G $dir/swap2
+mdconfig -a -t vnode -f $dir/swap2 -u $md2
+swapon /dev/md$md2
+set +e
+
+timeout 4m /tmp/swapoff3 &
+for i in `jot 60`; do
+	n=`swapinfo | tail -1 | awk '{print $3}'`
+	[ $n -gt 0 ] && break
+	sleep 1
+done
+echo "Total in use: $n"
+
+n=0
+start=`date +%s`
+while [ $((`date +%s` - start)) -lt 120 ]; do
+	for dev in /dev/md$md1 /dev/md$md2; do
+		for i in `jot 3`; do
+			swapoff $dev && break
+		done
+		swapon $dev
+		n=$((n + 1))
+	done
+	sleep .1
+done
+kill $!
+echo "$n swapoffs"
+[ $n -lt 1000 ] && { echo "Only performed $n swapoffs"; s=1; } || s=0
+wait
+for dev in /dev/md$md1 /dev/md$md2; do
+	swapoff $dev
+done
+mdconfig -d -u $md1
+mdconfig -d -u $md2
+rm -f $dir/swap1 $dir/swap2 /tmp/swapoff3 /tmp/swapoff3.c
+[ $off ] && swapon -a > /dev/null
+exit $s

Property changes on: user/pho/stress2/misc/swapoff3.sh
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Added: svn:executable
## -0,0 +1 ##
+*
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