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https://github.com/linux-apfs/apfstests.git
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Zorro Lang
53600ec6d3
When mixing buffered reads and asynchronous direct writes, it is possible to end up with the situation where we have stale data in the page cache while the new data is already written to disk. This issue should be fixed by patch titled: fs: Fix page cache inconsistency when mixing buffered and AIO DIO Signed-off-by: Zorro Lang <zlang@redhat.com> Reviewed-by: Eryu Guan <eguan@redhat.com> Signed-off-by: Eryu Guan <eguan@redhat.com>
91 lines
2.4 KiB
Bash
Executable File
91 lines
2.4 KiB
Bash
Executable File
#! /bin/bash
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# FS QA Test No. 451
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#
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# Test data integrity when mixing buffered reads and asynchronous
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# direct writes a file.
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#
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#-----------------------------------------------------------------------
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# Copyright (c) 2017 Red Hat Inc. All Rights Reserved.
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License as
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# published by the Free Software Foundation.
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#
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# This program is distributed in the hope that it would be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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#-----------------------------------------------------------------------
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#
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seq=`basename $0`
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seqres=$RESULT_DIR/$seq
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echo "QA output created by $seq"
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here=`pwd`
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tmp=/tmp/$$
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status=1 # failure is the default!
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trap "_cleanup; exit \$status" 0 1 2 3 15
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_cleanup()
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{
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cd /
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rm -f $tmp.*
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}
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# get standard environment, filters and checks
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. ./common/rc
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# remove previous $seqres.full before test
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rm -f $seqres.full
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# real QA test starts here
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_supported_fs generic
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_supported_os Linux
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_require_test
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_require_test_program "feature"
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_require_aiodio aio-dio-cycle-write
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_require_command "$TIMEOUT_PROG" timeout
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TESTFILE=$TEST_DIR/tst-aio-dio-cycle-write.$seq
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FSIZE=655360 # bytes
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# More read processes can help to reproduce the bug easier, so run
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# 2 ~ 20 readers according to the number of CPUs
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nr_cpu=`$here/src/feature -o`
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loops=$((nr_cpu / 2))
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if [ $loops -lt 2 ]; then
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loops=2
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elif [ $loops -gt 20 ]; then
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loops=20
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fi
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keep_reading=$tmp.reading
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touch $keep_reading
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# buffered reads the file frequently
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for ((i=0; i<loops; i++)); do
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while [ -e $keep_reading ]; do
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$XFS_IO_PROG -f -c "pread 0 $FSIZE" $TESTFILE >/dev/null 2>&1
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done &
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reader_pid="$reader_pid $!"
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done
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# start an aio writer, which does writing loops internally and check
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# data integrality.
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# For reproduce the original bug, keep testing about 30s will be better,
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# So let the AIO_TEST run as many loops as it can, then kill it in 30s.
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$TIMEOUT_PROG -s TERM 30s $AIO_TEST -c 999999 -b $FSIZE $TESTFILE >/dev/null
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# Remove $keep_reading file to stop the reader cycle
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rm -f $keep_reading
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wait $reader_pid
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echo "Silence is golden"
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status=0
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exit
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