svn commit: r357720 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Mon Feb 10 08:55:11 2020
New Revision: 357720
URL: https://svnweb.freebsd.org/changeset/base/357720

Log:
  Added a regression test.

Added:
  user/pho/stress2/misc/mlockall6.sh   (contents, props changed)

Added: user/pho/stress2/misc/mlockall6.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/mlockall6.sh	Mon Feb 10 08:55:11 2020	(r357720)
@@ -0,0 +1,205 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2019 Dell EMC Isilon
+#
+# 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: Lock (rw) vm object not locked @ vm/vm_page.c:1013" seen:
+# https://people.freebsd.org/~pho/stress/log/mlockall6-2.txt
+
+. ../default.cfg
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+[ `swapinfo | wc -l` -eq 1 ] && exit 0
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/mlockall6.c
+mycc -o mlockall6 -Wall -Wextra -O0 -g mlockall6.c || exit 1
+rm -f mlockall6.c
+cd $odir
+
+mount | grep "on $mntpoint " | grep -q /dev/md && umount -f $mntpoint
+mdconfig -l | grep -q md$mdstart &&  mdconfig -d -u $mdstart
+mdconfig -a -t swap -s 512m -u $mdstart || exit 1
+bsdlabel -w md$mdstart auto
+newfs $newfs_flags -n md${mdstart}$part > /dev/null
+mount /dev/md${mdstart}$part $mntpoint || exit 1
+
+daemon sh -c "(cd $odir/../testcases/swap; ./swap -t 20m -i 20 -l 100)" \
+    > /dev/null 2>&1
+sleep 2
+
+(cd $mntpoint; /tmp/mlockall6 || echo FAIL)
+
+while pgrep -q swap; do
+	pkill -9 swap
+done
+
+n=0
+while mount | grep "on $mntpoint " | grep -q /dev/md; do
+	umount $mntpoint || sleep 1
+	n=$((n + 1))
+	[ $n -gt 10 ] && { echo FAIL; exit 1; }
+done
+mdconfig -d -u $mdstart
+rm -rf /tmp/mlockall6
+exit 0
+
+EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <machine/atomic.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+#define LOOPS 2
+#define PARALLEL 8
+#define R0 0
+#define R1 1
+#define R2 2
+#define RUNTIME (10 * 60)
+
+static volatile u_int *share;
+static int ps;
+static char c[32 * 1024 * 1024];
+
+static void
+touch(void)
+{
+	int i;
+
+	for (i = 0; i < (int)sizeof(c); i += ps)
+		c[i] = 1;
+}
+
+static void
+test2(void)
+{
+	pid_t pid;
+	volatile u_int *share2;
+	size_t len;
+	int i, status;
+
+	len = ps;
+	if ((share2 = mmap(NULL, len, PROT_READ | PROT_WRITE,
+	    MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+		err(1, "mmap");
+	touch();
+	usleep(arc4random() % 100000);
+	alarm(600);
+	if ((pid = fork()) == 0) {
+		alarm(600);
+		while (share2[R1] == 0)	/* Wait for parent */
+			;
+		atomic_add_int(&share2[R1], 1);
+		if (arc4random() % 100 < 50)
+			usleep(arc4random() % 1000);
+		if (mlockall(MCL_CURRENT | MCL_FUTURE) == -1)
+			err(1, "mlock");
+		touch();
+		atomic_add_int(&share2[R2], 1);
+		_exit(0);
+	}
+	atomic_add_int(&share2[R1], 1);
+	while (share2[R1] != 2)	/* Wait for child */
+		;
+
+	for (i = 0; i < 100000 && share2[R2] == 0; i++)
+		touch();	/* while child is running */
+
+	if (waitpid(pid, &status, 0) == -1)
+		err(1, "wait");
+
+	if (status != 0)
+		fprintf(stderr, "Got signal %d\n", WTERMSIG(status));
+	_exit(WTERMSIG(status));
+}
+
+static void
+test(void)
+{
+	pid_t pid;
+	int i, s, status;
+
+	while (share[R0] == 0)
+		;
+	s = 0;
+	for (i = 0; i < LOOPS; i++) {
+		if ((pid = fork()) == 0)
+			test2();
+		waitpid(pid, &status, 0);
+		s = (s == 0) ? status : s;
+	}
+	_exit(s);
+}
+
+int
+main(void)
+{
+	pid_t pid;
+	size_t len;
+	time_t start;
+	int i, s, status;
+
+	ps = getpagesize();
+	len = ps;
+	if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
+	    MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+		err(1, "mmap");
+	start = time(NULL);
+	s = 0;
+	while (s == 0 && (time(NULL) - start) < RUNTIME) {
+		for (i = 0; i < PARALLEL; i++) {
+			if ((pid = fork()) == 0)
+				test();
+		}
+		atomic_add_int(&share[R0], 1);	/* Start test() runs */
+		for (i = 0; i < PARALLEL; i++) {
+			waitpid(pid, &status, 0);
+			if (status != 0) {
+				fprintf(stderr, "FAIL: status = %d\n",
+				    status);
+			}
+			s = (s == 0) ? status : s;
+		}
+		atomic_add_int(&share[R0], -1);
+	}
+
+	return (s);
+}