svn commit: r253410 - user/pho/stress2/misc
Peter Holm
pho at FreeBSD.org
Wed Jul 17 06:29:42 UTC 2013
Author: pho
Date: Wed Jul 17 06:29:41 2013
New Revision: 253410
URL: http://svnweb.freebsd.org/changeset/base/253410
Log:
Added two regression test for r253189: "Never remove user-wired pages from
an object when doing msync(MS_INVALIDATE)".
Sponsored by: EMC / Isilon storage division
Added:
user/pho/stress2/misc/msync.sh (contents, props changed)
user/pho/stress2/misc/wire_no_page.sh (contents, props changed)
Added: user/pho/stress2/misc/msync.sh
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/pho/stress2/misc/msync.sh Wed Jul 17 06:29:41 2013 (r253410)
@@ -0,0 +1,201 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2013 Peter Holm <pho at FreeBSD.org>
+# 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.
+#
+# $FreeBSD$
+#
+
+# msync(2) / mlockall(2) test scenario.
+# "panic: vm_fault_copy_wired: page missing" seen.
+# http://people.freebsd.org/~pho/stress/log/msync.txt
+# Fixed in r253189.
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/msync.c
+cc -o msync -Wall -Wextra msync.c -lpthread || exit 1
+rm -f msync.c
+cd $odir
+
+/tmp/msync
+
+killall msync > /dev/null 2>&1
+rm -f /tmp/msync
+exit
+
+EOF
+#include <sys/types.h>
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <pwd.h>
+#include <signal.h>
+#include <sys/mman.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <sys/syscall.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+int syscallno = SYS_msync;
+#define N (128 * 1024 / (int)sizeof(u_int32_t))
+u_int32_t r[N];
+
+static void
+hand(int i __unused) { /* handler */
+ _exit(1);
+}
+
+unsigned long
+makearg(void)
+{
+ unsigned int i;
+ unsigned long val;
+
+ val = arc4random();
+ i = arc4random() % 100;
+ if (i < 20)
+ val = val & 0xff;
+ if (i >= 20 && i < 40)
+ val = val & 0xffff;
+ if (i >= 40 && i < 60)
+ val = (unsigned long)(r) | (val & 0xffff);
+#if defined(__LP64__)
+ if (i >= 60) {
+ val = (val << 32) | arc4random();
+ if (i > 80)
+ val = val & 0x00007fffffffffffUL;
+ }
+#endif
+
+ return(val);
+}
+
+void *
+calls(void *arg __unused)
+{
+ int i, num;
+ unsigned long arg1, arg2, arg3;
+
+ usleep(1000);
+ num = syscallno;
+ for (i = 0; i < 500; i++) {
+ arg1 = makearg();
+ arg2 = makearg();
+#if 0
+ arg3 = makearg();
+ arg3 = arg3 & ~MS_INVALIDATE; /* No problem seen */
+#else
+ arg3 = MS_INVALIDATE; /* panic */
+#endif
+
+#if 0
+ fprintf(stderr, "%2d : syscall(%3d, 0x%lx, 0x%lx, 0x%lx)\n",
+ i, num, arg1, arg2, arg3);
+ usleep(50000);
+#endif
+ alarm(1);
+ syscall(num, arg1, arg2, arg3);
+ num = 0;
+ }
+
+ return (0);
+}
+void
+wd(void)
+{
+ int i;
+
+ if (mlockall(MCL_CURRENT | MCL_FUTURE) != 0)
+ err(1, "mlockall failed");
+
+ for (i = 0; i < 800; i++) {
+ if (fork() == 0) {
+ usleep(20000);
+ _exit(0);
+ }
+ wait(NULL);
+ usleep(100000);
+ }
+
+ _exit(0);
+}
+
+int
+main(void)
+{
+ struct passwd *pw;
+ pthread_t cp[50];
+ int i, j;
+
+ if (fork() == 0)
+ wd();
+
+ if ((pw = getpwnam("nobody")) == NULL)
+ err(1, "no such user: nobody");
+
+ if (setgroups(1, &pw->pw_gid) ||
+ setegid(pw->pw_gid) || setgid(pw->pw_gid) ||
+ seteuid(pw->pw_uid) || setuid(pw->pw_uid))
+ err(1, "Can't drop privileges to \"nobody\"");
+ endpwent();
+
+ signal(SIGALRM, hand);
+ signal(SIGILL, hand);
+ signal(SIGFPE, hand);
+ signal(SIGSEGV, hand);
+ signal(SIGBUS, hand);
+ signal(SIGURG, hand);
+ signal(SIGSYS, hand);
+ signal(SIGTRAP, hand);
+
+ alarm(180);
+ for (i = 0; i < 8000; i++) {
+ if (fork() == 0) {
+ arc4random_stir();
+ for (j = 0; j < N; j++)
+ r[j] = arc4random();
+ for (j = 0; j < 50; j++)
+ if (pthread_create(&cp[j], NULL, calls, NULL) != 0)
+ perror("pthread_create");
+
+ for (j = 0; j < 50; j++)
+ pthread_join(cp[j], NULL);
+ _exit(0);
+ }
+ wait(NULL);
+ }
+
+ return (0);
+}
Added: user/pho/stress2/misc/wire_no_page.sh
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ user/pho/stress2/misc/wire_no_page.sh Wed Jul 17 06:29:41 2013 (r253410)
@@ -0,0 +1,105 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2013 Peter Holm <pho at FreeBSD.org>
+# 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.
+#
+# $FreeBSD$
+#
+
+# Test scenario by kib@
+
+# "panic: vm_page_set_invalid: page 0xc3dfe8c0 is busy" seen.
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/wire_no_page.c
+cc -o wire_no_page -Wall -Wextra wire_no_page.c -lpthread || exit 1
+rm -f wire_no_page.c
+cd $odir
+
+cp /tmp/wire_no_page /tmp/wire_no_page2
+for i in `jot 100`; do
+ for j in `jot 50`; do
+ /tmp/wire_no_page /tmp/wire_no_page2 &
+ done
+ for j in `jot 50`; do
+ wait
+ done
+done
+
+rm -f /tmp/wire_no_page /tmp/wire_no_page2
+exit
+
+EOF
+/* $Id: wire_no_page.c,v 1.1 2013/05/17 07:50:30 kostik Exp kostik $ */
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/fcntl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <err.h>
+#include <unistd.h>
+
+int
+main(int argc, char *argv[])
+{
+ struct stat st;
+ char *p1, *p2;
+ size_t len;
+ pid_t child;
+ int error, fd;
+
+ if (argc < 2)
+ errx(1, "file name ?");
+ fd = open(argv[1], O_RDWR);
+ if (fd == -1)
+ err(1, "open %s", argv[1]);
+ error = fstat(fd, &st);
+ if (error == -1)
+ err(1, "stat");
+ len = round_page(st.st_size);
+ p1 = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ if ((void *)p1 == MAP_FAILED)
+ err(1, "mmap");
+ error = mlock(p1, len);
+ if (error == -1)
+ err(1, "mlock");
+ p2 = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
+ if ((void *)p2 == MAP_FAILED)
+ err(1, "mmap");
+ error = msync(p2, len, MS_SYNC | MS_INVALIDATE);
+ if (error == -1)
+ err(1, "msync");
+ child = fork();
+ if (child == -1)
+ err(1, "fork");
+ else if (child == 0)
+ _exit(0);
+
+ return (0);
+}
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