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110 lines
2.8 KiB
Bash
Executable file
110 lines
2.8 KiB
Bash
Executable file
#!/bin/sh
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#
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# Copyright (c) 2010 Peter Holm <pho@FreeBSD.org>
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# All rights reserved.
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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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# panic: deadlkres: possible deadlock detected for 0xc8576a00, blocked for 1801792 ticks
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# Scenario by kib@
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[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
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. ../default.cfg
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odir=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $odir/$0 > tmpfs6.c
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mycc -o tmpfs6 -Wall -Wextra -O2 tmpfs6.c || exit 1
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rm -f tmpfs6.c
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mount | grep $mntpoint | grep -q tmpfs && umount $mntpoint
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mount -t tmpfs tmpfs $mntpoint
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(cd $mntpoint; /tmp/tmpfs6)
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rm -f /tmp/tmpfs6
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while mount | grep $mntpoint | grep -q tmpfs; do
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umount $mntpoint || sleep 1
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done
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exit
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EOF
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <err.h>
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int pagesize;
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#define FILESIZE (32 * 1024)
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char wbuffer[FILESIZE];
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void
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test(void)
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{
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int fd;
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int len;
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void *addr;
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char filename[80];
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snprintf(filename, sizeof(filename), "file.%07d", getpid());
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if ((fd = open(filename, O_CREAT | O_TRUNC | O_RDWR, S_IRWXU)) == -1)
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err(1, "open(%s)", filename);
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if ((len = write(fd, wbuffer, FILESIZE)) != FILESIZE)
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err(1, "write()");
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fsync(fd);
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if ((addr = mmap(NULL, FILESIZE, PROT_READ | PROT_WRITE , MAP_SHARED, fd, 0)) == MAP_FAILED)
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err(1, "mmap()");
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if (lseek(fd, 0, SEEK_SET) != 0)
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err(1, "lseek()");
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if ((len = write(fd, addr, FILESIZE)) != FILESIZE)
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err(1, "write() 2");
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if (munmap(addr, FILESIZE) == -1)
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err(1, "munmap()");
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close(fd);
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unlink(filename);
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}
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int
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main(void)
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{
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int i;
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for (i = 0; i < 10000; i++)
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test();
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return (0);
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}
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