1#!/bin/sh 2 3# 4# Copyright (c) 2015 EMC Corp. 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# Trigger the two EDEADLK in vm/vm_pageout.c 30# OOVM deadlock seen 31# https://people.freebsd.org/~pho/stress/log/pageout.txt 32 33# "panic: handle_written_filepage: not started" seen: 34# https://people.freebsd.org/~pho/stress/log/pageout-2.txt 35 36[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 37. ../default.cfg 38 39dir=/tmp 40odir=`pwd` 41cd $dir 42sed '1,/^EOF/d' < $odir/$0 > $dir/pageout.c 43mycc -o pageout -Wall -Wextra -g pageout.c || exit 1 44rm -f pageout.c 45cd $odir 46 47mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint 48mdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart 49 50mdconfig -a -t swap -s 2g -u $mdstart || exit 1 51 52newfs $newfs_flags md$mdstart > /dev/null 53 54mount /dev/md$mdstart $mntpoint 55chmod 777 $mntpoint 56 57f1=$mntpoint/f1 58dd if=/dev/zero of=$f1 bs=1m count=1k status=none 59 60daemon sh -c "(cd ../testcases/swap; ./swap -t 5m -i 20 -l 100 -h)" > /dev/null 61(cd /tmp; /tmp/pageout $f1) & 62sleep .2 63while kill -0 $! 2> /dev/null; do 64 mksnap_ffs $mntpoint $mntpoint/.snap/stress2 && 65 rm -f $mntpoint/.snap/stress2 66done 67while pgrep -q swap; do 68 pkill swap 69done 70wait 71 72while mount | grep $mntpoint | grep -q /dev/md; do 73 umount $mntpoint || sleep 1 74done 75mdconfig -d -u $mdstart 76rm -f /tmp/pageout /tmp/pageout.core 77exit 78 79EOF 80#include <sys/param.h> 81#include <sys/fcntl.h> 82#include <sys/mman.h> 83#include <sys/stat.h> 84 85#include <err.h> 86#include <errno.h> 87#include <stdio.h> 88#include <stdlib.h> 89#include <time.h> 90#include <unistd.h> 91 92const char *file; 93 94#define RUNTIME 600 95 96void 97test(void) 98{ 99 struct stat st; 100 size_t i, len; 101 time_t start; 102 int error, fd, ps; 103 char *p; 104 105 ps = getpagesize(); 106 if ((fd = open(file, O_RDWR)) == -1) 107 err(1, "open(%s)", file); 108 if ((error = fstat(fd, &st)) == -1) 109 err(1, "stat(%s)", file); 110 len = round_page(st.st_size); 111 do { 112 if ((p = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, 113 fd, 0)) == MAP_FAILED) { 114 if (errno == ENOMEM) 115 len -= ps; 116 else 117 err(1, "mmap"); 118 } 119 } while (p == MAP_FAILED); 120 121 start = time(NULL); 122 /* Touch all pages of the file. */ 123 for (i = 0; i < len; i += ps) 124 p[i] = 1; 125 while (time(NULL) - start < RUNTIME) 126 p[arc4random() % len] = 1; 127 128 if (munmap(p, len) == -1) 129 err(1, "unmap()"); 130 close(fd); 131} 132 133int 134main(int argc, char *argv[]) 135{ 136 if (argc != 2) 137 errx(1, "Usage: %s <file>", argv[0]); 138 file = argv[1]; 139 140 test(); 141 142 return (0); 143} 144