1# $FreeBSD$
2
3#
4# Copyright (c) 2008 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# $FreeBSD$
29#
30
31# test recursive flushes in bdwrite().
32
33[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
34
35snap() {
36   for i in `jot 5`; do
37      mksnap_ffs $1 $2
38      [ $? -eq 0 ] && break
39   done
40}
41
42old=`sysctl vfs.recursiveflushes | awk '{print $NF}'`
43cd /var/tmp
44rm -f /var/.snap/pho.*
45trap "rm -f /var/.snap/pho.*" 0
46snap /var /var/.snap/pho.1
47snap /var /var/.snap/pho.2
48snap /var /var/.snap/pho.3
49snap /var /var/.snap/pho.4
50snap /var /var/.snap/pho.5
51
52for i in `jot 32`; do
53   # Create 32 Mb files
54   dd if=/dev/zero of=big.$i bs=16k count=2048 2>&1 | egrep -v "records|transferred"&
55done
56for i in `jot 32`; do
57   wait
58done
59for i in `jot 32`; do
60   rm -f big.$i
61done
62
63rm -f /var/.snap/pho.*
64new=`sysctl vfs.recursiveflushes | awk '{print $NF}'`
65[ $old != $new ] && echo "vfs.recursiveflushes changed from $old to $new"
66