160 lines
3.9 KiB
Bash
Executable File
160 lines
3.9 KiB
Bash
Executable File
#!/bin/sh
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#
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# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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#
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# Copyright (c) 2020 Peter Holm <pho@FreeBSD.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# Attempt to reproduce "vm_page_assert_xbusied: page XXXX not exclusive busy"
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# No problems seen.
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# Test scenario idea by markj@
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. ../default.cfg
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[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
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[ `sysctl -n vm.swap_total` -eq 0 ] && exit 0
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dir=/tmp
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odir=`pwd`
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cd $dir
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sed '1,/^EOF/d' < $odir/$0 > $dir/mmap40.c
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mycc -o mmap40 -Wall -Wextra -O0 -g mmap40.c || exit 1
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rm -f mmap40.c
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cd $odir
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set -e
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mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
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[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
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mdconfig -a -t swap -s 2g -u $mdstart
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newfs $newfs_flags md$mdstart > /dev/null
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mount /dev/md$mdstart $mntpoint
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set +e
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u1=`swapinfo | tail -1 | awk '{print $3}'`
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(nice $odir/../testcases/swap/swap -t 10m -i 30 -h -l 100) &
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while [ $((`swapinfo | tail -1 | awk '{print $3}'` - $u1)) -le 100 ]; do
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sleep 1
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done
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$dir/mmap40
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s=0
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while pkill swap; do :; done
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wait
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[ -f mmap40.core -a $s -eq 0 ] &&
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{ ls -l mmap40.core; mv mmap40.core $dir; s=1; }
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cd $odir
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for i in `jot 6`; do
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mount | grep -q "on $mntpoint " || break
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umount $mntpoint && break || sleep 10
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[ $i -eq 6 ] &&
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{ echo FATAL; fstat -mf $mntpoint; exit 1; }
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done
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mdconfig -d -u $mdstart
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rm -rf $dir/mmap40
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exit $s
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EOF
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#include <sys/param.h>
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#include <sys/mman.h>
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#include <sys/wait.h>
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#include <err.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#define PARALLEL 512
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#define RUNTIME 300
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void
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test(void)
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{
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pid_t pid;
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size_t i, len;
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time_t start;
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void *p;
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char *vec;
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len = 1024 * 1024;
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if ((p = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_ANON, -1, 0)) ==
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MAP_FAILED)
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err(1, "mmap");
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memset(p, 0, len); /* dirty the memory */
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if ((vec = malloc(len / PAGE_SIZE)) == NULL)
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err(1, "malloc");
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start = time(NULL);
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while (time(NULL) - start < RUNTIME) {
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usleep(arc4random() % 1000);
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if (mincore(p, len, vec) == -1)
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err(1, "mincore");
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for (i = 0; i < len / PAGE_SIZE; i++) {
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if ((vec[i] & MINCORE_MODIFIED) == 0) {
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_exit(0);
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}
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}
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if ((pid = fork()) == 0) {
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_exit(0);
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}
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if (waitpid(pid, NULL, 0) != pid)
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err(1, "waitpid)");
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}
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_exit(0);
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}
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int
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main(void)
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{
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pid_t pids[PARALLEL];
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time_t start;
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int i;
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for (i = 0; i < PARALLEL; i++) {
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if ((pids[i] = fork()) == 0)
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test();
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}
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start = time(NULL);
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while (time(NULL) - start < RUNTIME) {
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for (i = 0; i < PARALLEL; i++) {
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if (waitpid(pids[i], NULL, WNOHANG) == pids[i]) {
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if ((pids[i] = fork()) == 0)
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test();
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}
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}
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}
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for (i = 0; i < PARALLEL; i++) {
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if (waitpid(pids[i], NULL, 0) != pids[i])
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err(1, "waitpid");
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}
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return (0);
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}
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