4 # Test for race between direct I/O and mmap
6 #-----------------------------------------------------------------------
7 # Copyright (c) 2010 Red Hat, Inc. All Rights Reserved.
9 # This program is free software; you can redistribute it and/or
10 # modify it under the terms of the GNU General Public License as
11 # published by the Free Software Foundation.
13 # This program is distributed in the hope that it would be useful,
14 # but WITHOUT ANY WARRANTY; without even the implied warranty of
15 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 # GNU General Public License for more details.
18 # You should have received a copy of the GNU General Public License
19 # along with this program; if not, write the Free Software Foundation,
20 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 #-----------------------------------------------------------------------
24 owner=lmcilroy@redhat.com
27 echo "QA output created by $seq"
31 status=1 # failure is the default!
32 trap "_cleanup; exit \$status" 0 1 2 3 7 15
37 rm -f $tmp.* $testfile
41 # get standard environment, filters and checks
45 # real QA test starts here
47 # Modify as appropriate.
51 testfile=$TEST_DIR/$seq.$$
57 dd if=/dev/zero of=$testfile bs=$iosize count=$loops &> /dev/null
61 # Direct I/O overwriter
62 dd if=/dev/zero of=$testfile oflag=direct bs=$iosize count=$loops conv=notrunc &> /dev/null &
66 start=`expr $loops - 1`
67 for i in `seq $start -1 0`
69 offset=`expr $i \* $iosize`
70 $XFS_IO_PROG -F -f -c "mmap -w $offset $iosize" -c "mwrite $offset $iosize" $testfile
76 echo "Silence is golden."