4 # Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
7 # Redistribution and use in source and binary forms, with or without
8 # modification, are permitted provided that the following conditions
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.
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
31 # test recursive flushes in bdwrite().
33 [ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
42 old=`sysctl vfs.recursiveflushes | awk '{print $NF}'`
44 rm -f /var/.snap/pho.*
45 trap "rm -f /var/.snap/pho.*" 0
46 snap /var /var/.snap/pho.1
47 snap /var /var/.snap/pho.2
48 snap /var /var/.snap/pho.3
49 snap /var /var/.snap/pho.4
50 snap /var /var/.snap/pho.5
54 dd if=/dev/zero of=big.$i bs=16k count=2048 2>&1 | egrep -v "records|transferred"&
63 rm -f /var/.snap/pho.*
64 new=`sysctl vfs.recursiveflushes | awk '{print $NF}'`
65 [ $old != $new ] && echo "vfs.recursiveflushes changed from $old to $new"