svn commit: r255697 - user/pho/stress2/misc
Peter Holm
pho at FreeBSD.org
Thu Sep 19 07:39:09 UTC 2013
Author: pho
Date: Thu Sep 19 07:39:08 2013
New Revision: 255697
URL: http://svnweb.freebsd.org/changeset/base/255697
Log:
Added msync(2) regression test.
Sponsored by: EMC / Isilon storage division
Added:
user/pho/stress2/misc/msync2.sh (contents, props changed)
Added: user/pho/stress2/misc/msync2.sh
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/pho/stress2/misc/msync2.sh Thu Sep 19 07:39:08 2013 (r255697)
@@ -0,0 +1,126 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2013 EMC Corp.
+# All rights reserved.
+#
+# 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: vm_pageout_flush: partially invalid page xx index 0/1" seen.
+# Fixed in r255566.
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/msync2.c
+cc -o msync2 -Wall -Wextra msync2.c || exit 1
+rm -f msync2.c
+cd $odir
+
+dd if=/dev/zero bs=$((4096 + 1)) of=/tmp/msync2.inputfile count=1 2>&1 |
+ egrep -v "records|transferred"
+/tmp/msync2 /tmp/msync2.inputfile
+rm -f /tmp/msync2 /tmp/msync2.inputfile
+exit
+
+EOF
+#include <err.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <sys/fcntl.h>
+#include <sys/mman.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+const char *file;
+char c;
+
+void
+wr(void)
+{
+ struct stat st;
+ char *p1;
+ size_t len;
+ int error, fd;
+
+ if ((fd = open(file, O_RDWR)) == -1)
+ err(1, "open %s", file);
+ if ((error = fstat(fd, &st)) == -1)
+ err(1, "stat(%s)", file);
+ len = round_page(st.st_size);
+ if ((p1 = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == MAP_FAILED)
+ err(1, "mmap");
+// p1[len - 1] = 1; /* No panic with this */
+ p1[arc4random() % len] = 1; /* Need this for the panic */
+
+ if ((error = msync(p1, len, MS_SYNC | MS_INVALIDATE)) == -1)
+ if (errno != EBUSY)
+ err(1, "msync");
+
+ if (munmap(p1, len) == -1)
+ err(1, "unmap()");
+ close(fd);
+
+ _exit(0);
+}
+
+void
+test(void)
+{
+#if 1
+ int i;
+
+ for (i = 0; i < 3; i++)
+ if (fork() == 0)
+ wr();
+ for (i = 0; i < 3; i++)
+ wait(NULL);
+#else
+ wr(); /* No problem here */
+#endif
+
+ _exit(0);
+}
+
+int
+main(int argc, char *argv[])
+{
+ int i;
+
+ if (argc != 2)
+ errx(1, "Usage: %s <file>", argv[0]);
+ file = argv[1];
+
+ for (i = 0; i < 30000; i++) {
+ if (fork() == 0)
+ test();
+ wait(NULL);
+ }
+
+ return (0);
+}
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