1#!/bin/sh 2 3# 4# Copyright (c) 2013 Peter Holm <pho@FreeBSD.org> 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# Test scenario by kib@ 30 31# "panic: vm_page_set_invalid: page 0xc3dfe8c0 is busy" seen. 32 33[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 34 35. ../default.cfg 36 37dir=/tmp 38odir=`pwd` 39cd $dir 40sed '1,/^EOF/d' < $odir/$0 > $dir/wire_no_page.c 41mycc -o wire_no_page -Wall -Wextra wire_no_page.c -lpthread || exit 1 42rm -f wire_no_page.c 43cd $odir 44 45cp /tmp/wire_no_page /tmp/wire_no_page2 46start=`date '+%s'` 47while [ $((`date '+%s'` - start)) -lt 300 ]; do 48 for i in `jot 50`; do 49 /tmp/wire_no_page /tmp/wire_no_page2 & 50 done 51 wait 52done 53 54rm -f /tmp/wire_no_page /tmp/wire_no_page2 55exit 56 57EOF 58/* $Id: wire_no_page.c,v 1.1 2013/05/17 07:50:30 kostik Exp kostik $ */ 59#include <sys/types.h> 60#include <sys/param.h> 61#include <sys/fcntl.h> 62#include <sys/mman.h> 63#include <sys/stat.h> 64#include <err.h> 65#include <unistd.h> 66 67int 68main(int argc, char *argv[]) 69{ 70 struct stat st; 71 char *p1, *p2; 72 size_t len; 73 pid_t child; 74 int error, fd; 75 76 if (argc < 2) 77 errx(1, "file name ?"); 78 fd = open(argv[1], O_RDWR); 79 if (fd == -1) 80 err(1, "open %s", argv[1]); 81 error = fstat(fd, &st); 82 if (error == -1) 83 err(1, "stat"); 84 len = round_page(st.st_size); 85 p1 = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 86 if ((void *)p1 == MAP_FAILED) 87 err(1, "mmap"); 88 error = mlock(p1, len); 89 if (error == -1) 90 err(1, "mlock"); 91 p2 = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); 92 if ((void *)p2 == MAP_FAILED) 93 err(1, "mmap"); 94 error = msync(p2, len, MS_SYNC | MS_INVALIDATE); 95 if (error == -1) 96 err(1, "msync"); 97 child = fork(); 98 if (child == -1) 99 err(1, "fork"); 100 else if (child == 0) 101 _exit(0); 102 103 return (0); 104} 105