diff mbox

[v2,3/3] xfstests: dedupe with random io race test

Message ID 20180620084114.25648-3-zlang@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

Zorro Lang June 20, 2018, 8:41 a.m. UTC 
Run several duperemove processes with fsstress on same directory at
same time. Make sure the race won't break the fs or kernel.

Signed-off-by: Zorro Lang <zlang@redhat.com>
---

V2 did below changes:
1) do sleep 1 after kill processes
2) change SLEEP_TIME to sleep_time
3) add the case to stress group

Thanks,
Zorro

 tests/shared/010     | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++
 tests/shared/010.out |   2 +
 tests/shared/group   |   1 +
 3 files changed, 114 insertions(+)
 create mode 100755 tests/shared/010
 create mode 100644 tests/shared/010.out

Comments

Darrick J. Wong June 20, 2018, 4:30 p.m. UTC | #1 
On Wed, Jun 20, 2018 at 04:41:14PM +0800, Zorro Lang wrote:
> Run several duperemove processes with fsstress on same directory at
> same time. Make sure the race won't break the fs or kernel.
> 
> Signed-off-by: Zorro Lang <zlang@redhat.com>
> ---
> 
> V2 did below changes:
> 1) do sleep 1 after kill processes
> 2) change SLEEP_TIME to sleep_time
> 3) add the case to stress group
> 
> Thanks,
> Zorro
> 
>  tests/shared/010     | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++
>  tests/shared/010.out |   2 +
>  tests/shared/group   |   1 +
>  3 files changed, 114 insertions(+)
>  create mode 100755 tests/shared/010
>  create mode 100644 tests/shared/010.out
> 
> diff --git a/tests/shared/010 b/tests/shared/010
> new file mode 100755
> index 00000000..c449c247
> --- /dev/null
> +++ b/tests/shared/010
> @@ -0,0 +1,111 @@
> +#! /bin/bash
> +# FS QA Test 010
> +#
> +# Dedup & random I/O race test, do multi-threads fsstress and dedupe on
> +# same directory/files
> +#
> +#-----------------------------------------------------------------------
> +# Copyright (c) 2018 Red Hat Inc.  All Rights Reserved.
> +#
> +# This program is free software; you can redistribute it and/or
> +# modify it under the terms of the GNU General Public License as
> +# published by the Free Software Foundation.
> +#
> +# This program is distributed in the hope that it would be useful,
> +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> +# GNU General Public License for more details.
> +#
> +# You should have received a copy of the GNU General Public License
> +# along with this program; if not, write the Free Software Foundation,
> +# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
> +#-----------------------------------------------------------------------
> +#
> +
> +seq=`basename $0`
> +seqres=$RESULT_DIR/$seq
> +echo "QA output created by $seq"
> +
> +here=`pwd`
> +tmp=/tmp/$$
> +status=1	# failure is the default!
> +trap "_cleanup; exit \$status" 0 1 2 3 15
> +
> +_cleanup()
> +{
> +	cd /
> +	rm -f $tmp.*
> +	kill_all_stress
> +}
> +
> +# get standard environment, filters and checks
> +. ./common/rc
> +. ./common/filter
> +. ./common/reflink
> +
> +# remove previous $seqres.full before test
> +rm -f $seqres.full
> +
> +# real QA test starts here
> +
> +# duperemove only supports btrfs and xfs (with reflink feature).
> +# Add other filesystems if it supports more later.
> +_supported_fs xfs btrfs
> +_supported_os Linux
> +_require_scratch_dedupe
> +_require_command "$DUPEREMOVE_PROG" duperemove
> +_require_command "$KILLALL_PROG" killall
> +
> +_scratch_mkfs > $seqres.full 2>&1
> +_scratch_mount >> $seqres.full 2>&1
> +
> +function kill_all_stress()
> +{
> +	local f=1
> +	local d=1
> +
> +	# kill the bash process which loop run duperemove
> +	if [ -n "$loop_dedup_pid" ]; then
> +		kill $loop_dedup_pid > /dev/null 2>&1
> +		wait $loop_dedup_pid > /dev/null 2>&1
> +		loop_dedup_pid=""
> +	fi
> +
> +	# Make sure all fsstress and duperemove processes get killed
> +	while [ $((f + d)) -ne 0 ]; do
> +		$KILLALL_PROG -q $FSSTRESS_PROG > /dev/null 2>&1
> +		$KILLALL_PROG -q $DUPEREMOVE_PROG > /dev/null 2>&1
> +		sleep 1
> +		f=`ps -eLf | grep $FSSTRESS_PROG | grep -v "grep" | wc -l`
> +		d=`ps -eLf | grep $DUPEREMOVE_PROG | grep -v "grep" | wc -l`
> +	done
> +}
> +
> +sleep_time=$((50 * TIME_FACTOR))
> +
> +# Start fsstress
> +fsstress_opts="-r -n 1000 -p $((5 * LOAD_FACTOR))"
> +$FSSTRESS_PROG $fsstress_opts -d $SCRATCH_MNT -l 0 >> $seqres.full 2>&1 &
> +loop_dedup_pid=""
> +# Start several dedupe processes on same directory
> +for ((i = 0; i < $((2 * LOAD_FACTOR)); i++)); do
> +	while true; do
> +		$DUPEREMOVE_PROG -dr --dedupe-options=same $SCRATCH_MNT/ \
> +			>>$seqres.full 2>&1

/me wonders why not just touch $TEST_DIR/run, have this loop do:

while test -e $TEST_DIR/run; do
	duperemove...
done

and then rm -f $TEST_DIR/run to end the loop?  Then you don't need the
complex machinery to shut down the bash loop and kill the fsstress and
duperemove processes.

Otherwise looks decent,

--D

> +	done &
> +	loop_dedup_pid="$! $loop_dedup_pid"
> +done
> +
> +# End the test after $sleep_time seconds
> +sleep $sleep_time
> +kill_all_stress
> +
> +# umount and mount again, verify pagecache contents don't mutate and a fresh
> +# read from the disk also doesn't show mutations.
> +find $testdir -type f -exec md5sum {} \; > $TEST_DIR/${seq}md5.sum
> +_scratch_cycle_mount
> +md5sum -c --quiet $TEST_DIR/${seq}md5.sum
> +
> +echo "Silence is golden"
> +status=0
> +exit
> diff --git a/tests/shared/010.out b/tests/shared/010.out
> new file mode 100644
> index 00000000..1d83a8d6
> --- /dev/null
> +++ b/tests/shared/010.out
> @@ -0,0 +1,2 @@
> +QA output created by 010
> +Silence is golden
> diff --git a/tests/shared/group b/tests/shared/group
> index 9c484794..094da27d 100644
> --- a/tests/shared/group
> +++ b/tests/shared/group
> @@ -12,6 +12,7 @@
>  007 dangerous_fuzzers
>  008 auto stress dedupe
>  009 auto stress dedupe
> +010 auto stress dedupe
>  032 mkfs auto quick
>  272 auto enospc rw
>  289 auto quick
> -- 
> 2.14.4
> 
> --
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Eryu Guan June 21, 2018, 1:58 a.m. UTC | #2 
On Wed, Jun 20, 2018 at 09:30:01AM -0700, Darrick J. Wong wrote:
> On Wed, Jun 20, 2018 at 04:41:14PM +0800, Zorro Lang wrote:
> > Run several duperemove processes with fsstress on same directory at
> > same time. Make sure the race won't break the fs or kernel.
> > 
> > Signed-off-by: Zorro Lang <zlang@redhat.com>
> > ---
> > 
> > V2 did below changes:
> > 1) do sleep 1 after kill processes
> > 2) change SLEEP_TIME to sleep_time
> > 3) add the case to stress group
> > 
> > Thanks,
> > Zorro
> > 
> >  tests/shared/010     | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++
> >  tests/shared/010.out |   2 +
> >  tests/shared/group   |   1 +
> >  3 files changed, 114 insertions(+)
> >  create mode 100755 tests/shared/010
> >  create mode 100644 tests/shared/010.out
> > 
> > diff --git a/tests/shared/010 b/tests/shared/010
> > new file mode 100755
> > index 00000000..c449c247
> > --- /dev/null
> > +++ b/tests/shared/010
> > @@ -0,0 +1,111 @@
> > +#! /bin/bash
> > +# FS QA Test 010
> > +#
> > +# Dedup & random I/O race test, do multi-threads fsstress and dedupe on
> > +# same directory/files
> > +#
> > +#-----------------------------------------------------------------------
> > +# Copyright (c) 2018 Red Hat Inc.  All Rights Reserved.
> > +#
> > +# This program is free software; you can redistribute it and/or
> > +# modify it under the terms of the GNU General Public License as
> > +# published by the Free Software Foundation.
> > +#
> > +# This program is distributed in the hope that it would be useful,
> > +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> > +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> > +# GNU General Public License for more details.
> > +#
> > +# You should have received a copy of the GNU General Public License
> > +# along with this program; if not, write the Free Software Foundation,
> > +# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
> > +#-----------------------------------------------------------------------
> > +#
> > +
> > +seq=`basename $0`
> > +seqres=$RESULT_DIR/$seq
> > +echo "QA output created by $seq"
> > +
> > +here=`pwd`
> > +tmp=/tmp/$$
> > +status=1	# failure is the default!
> > +trap "_cleanup; exit \$status" 0 1 2 3 15
> > +
> > +_cleanup()
> > +{
> > +	cd /
> > +	rm -f $tmp.*
> > +	kill_all_stress
> > +}
> > +
> > +# get standard environment, filters and checks
> > +. ./common/rc
> > +. ./common/filter
> > +. ./common/reflink
> > +
> > +# remove previous $seqres.full before test
> > +rm -f $seqres.full
> > +
> > +# real QA test starts here
> > +
> > +# duperemove only supports btrfs and xfs (with reflink feature).
> > +# Add other filesystems if it supports more later.
> > +_supported_fs xfs btrfs
> > +_supported_os Linux
> > +_require_scratch_dedupe
> > +_require_command "$DUPEREMOVE_PROG" duperemove
> > +_require_command "$KILLALL_PROG" killall
> > +
> > +_scratch_mkfs > $seqres.full 2>&1
> > +_scratch_mount >> $seqres.full 2>&1
> > +
> > +function kill_all_stress()
> > +{
> > +	local f=1
> > +	local d=1
> > +
> > +	# kill the bash process which loop run duperemove
> > +	if [ -n "$loop_dedup_pid" ]; then
> > +		kill $loop_dedup_pid > /dev/null 2>&1
> > +		wait $loop_dedup_pid > /dev/null 2>&1
> > +		loop_dedup_pid=""
> > +	fi
> > +
> > +	# Make sure all fsstress and duperemove processes get killed
> > +	while [ $((f + d)) -ne 0 ]; do
> > +		$KILLALL_PROG -q $FSSTRESS_PROG > /dev/null 2>&1
> > +		$KILLALL_PROG -q $DUPEREMOVE_PROG > /dev/null 2>&1
> > +		sleep 1
> > +		f=`ps -eLf | grep $FSSTRESS_PROG | grep -v "grep" | wc -l`
> > +		d=`ps -eLf | grep $DUPEREMOVE_PROG | grep -v "grep" | wc -l`
> > +	done
> > +}
> > +
> > +sleep_time=$((50 * TIME_FACTOR))
> > +
> > +# Start fsstress
> > +fsstress_opts="-r -n 1000 -p $((5 * LOAD_FACTOR))"
> > +$FSSTRESS_PROG $fsstress_opts -d $SCRATCH_MNT -l 0 >> $seqres.full 2>&1 &
> > +loop_dedup_pid=""
> > +# Start several dedupe processes on same directory
> > +for ((i = 0; i < $((2 * LOAD_FACTOR)); i++)); do
> > +	while true; do
> > +		$DUPEREMOVE_PROG -dr --dedupe-options=same $SCRATCH_MNT/ \
> > +			>>$seqres.full 2>&1
> 
> /me wonders why not just touch $TEST_DIR/run, have this loop do:
> 
> while test -e $TEST_DIR/run; do
> 	duperemove...
> done
> 
> and then rm -f $TEST_DIR/run to end the loop?  Then you don't need the
> complex machinery to shut down the bash loop and kill the fsstress and
> duperemove processes.

Yeah, this looks cleaner to me.

Zorro, could you please take a look and update the test as Darrick
suggested? Also, you could update the fstests repo and use new 'new'
script to generate new test template which has correct SPDX tag :)

> 
> Otherwise looks decent,

Thanks for reviewing!

Eryu

> 
> --D
> 
> > +	done &
> > +	loop_dedup_pid="$! $loop_dedup_pid"
> > +done
> > +
> > +# End the test after $sleep_time seconds
> > +sleep $sleep_time
> > +kill_all_stress
> > +
> > +# umount and mount again, verify pagecache contents don't mutate and a fresh
> > +# read from the disk also doesn't show mutations.
> > +find $testdir -type f -exec md5sum {} \; > $TEST_DIR/${seq}md5.sum
> > +_scratch_cycle_mount
> > +md5sum -c --quiet $TEST_DIR/${seq}md5.sum
> > +
> > +echo "Silence is golden"
> > +status=0
> > +exit
> > diff --git a/tests/shared/010.out b/tests/shared/010.out
> > new file mode 100644
> > index 00000000..1d83a8d6
> > --- /dev/null
> > +++ b/tests/shared/010.out
> > @@ -0,0 +1,2 @@
> > +QA output created by 010
> > +Silence is golden
> > diff --git a/tests/shared/group b/tests/shared/group
> > index 9c484794..094da27d 100644
> > --- a/tests/shared/group
> > +++ b/tests/shared/group
> > @@ -12,6 +12,7 @@
> >  007 dangerous_fuzzers
> >  008 auto stress dedupe
> >  009 auto stress dedupe
> > +010 auto stress dedupe
> >  032 mkfs auto quick
> >  272 auto enospc rw
> >  289 auto quick
> > -- 
> > 2.14.4
> > 
> > --
> > To unsubscribe from this list: send the line "unsubscribe fstests" in
> > the body of a message to majordomo@vger.kernel.org
> > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> --
> To unsubscribe from this list: send the line "unsubscribe fstests" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
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Zorro Lang June 21, 2018, 2:20 a.m. UTC | #3 
On Thu, Jun 21, 2018 at 09:58:43AM +0800, Eryu Guan wrote:
> On Wed, Jun 20, 2018 at 09:30:01AM -0700, Darrick J. Wong wrote:
> > On Wed, Jun 20, 2018 at 04:41:14PM +0800, Zorro Lang wrote:
> > > Run several duperemove processes with fsstress on same directory at
> > > same time. Make sure the race won't break the fs or kernel.
> > > 
> > > Signed-off-by: Zorro Lang <zlang@redhat.com>
> > > ---
> > > 
> > > V2 did below changes:
> > > 1) do sleep 1 after kill processes
> > > 2) change SLEEP_TIME to sleep_time
> > > 3) add the case to stress group
> > > 
> > > Thanks,
> > > Zorro
> > > 
> > >  tests/shared/010     | 111 +++++++++++++++++++++++++++++++++++++++++++++++++++
> > >  tests/shared/010.out |   2 +
> > >  tests/shared/group   |   1 +
> > >  3 files changed, 114 insertions(+)
> > >  create mode 100755 tests/shared/010
> > >  create mode 100644 tests/shared/010.out
> > > 
> > > diff --git a/tests/shared/010 b/tests/shared/010
> > > new file mode 100755
> > > index 00000000..c449c247
> > > --- /dev/null
> > > +++ b/tests/shared/010
> > > @@ -0,0 +1,111 @@
> > > +#! /bin/bash
> > > +# FS QA Test 010
> > > +#
> > > +# Dedup & random I/O race test, do multi-threads fsstress and dedupe on
> > > +# same directory/files
> > > +#
> > > +#-----------------------------------------------------------------------
> > > +# Copyright (c) 2018 Red Hat Inc.  All Rights Reserved.
> > > +#
> > > +# This program is free software; you can redistribute it and/or
> > > +# modify it under the terms of the GNU General Public License as
> > > +# published by the Free Software Foundation.
> > > +#
> > > +# This program is distributed in the hope that it would be useful,
> > > +# but WITHOUT ANY WARRANTY; without even the implied warranty of
> > > +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> > > +# GNU General Public License for more details.
> > > +#
> > > +# You should have received a copy of the GNU General Public License
> > > +# along with this program; if not, write the Free Software Foundation,
> > > +# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
> > > +#-----------------------------------------------------------------------
> > > +#
> > > +
> > > +seq=`basename $0`
> > > +seqres=$RESULT_DIR/$seq
> > > +echo "QA output created by $seq"
> > > +
> > > +here=`pwd`
> > > +tmp=/tmp/$$
> > > +status=1	# failure is the default!
> > > +trap "_cleanup; exit \$status" 0 1 2 3 15
> > > +
> > > +_cleanup()
> > > +{
> > > +	cd /
> > > +	rm -f $tmp.*
> > > +	kill_all_stress
> > > +}
> > > +
> > > +# get standard environment, filters and checks
> > > +. ./common/rc
> > > +. ./common/filter
> > > +. ./common/reflink
> > > +
> > > +# remove previous $seqres.full before test
> > > +rm -f $seqres.full
> > > +
> > > +# real QA test starts here
> > > +
> > > +# duperemove only supports btrfs and xfs (with reflink feature).
> > > +# Add other filesystems if it supports more later.
> > > +_supported_fs xfs btrfs
> > > +_supported_os Linux
> > > +_require_scratch_dedupe
> > > +_require_command "$DUPEREMOVE_PROG" duperemove
> > > +_require_command "$KILLALL_PROG" killall
> > > +
> > > +_scratch_mkfs > $seqres.full 2>&1
> > > +_scratch_mount >> $seqres.full 2>&1
> > > +
> > > +function kill_all_stress()
> > > +{
> > > +	local f=1
> > > +	local d=1
> > > +
> > > +	# kill the bash process which loop run duperemove
> > > +	if [ -n "$loop_dedup_pid" ]; then
> > > +		kill $loop_dedup_pid > /dev/null 2>&1
> > > +		wait $loop_dedup_pid > /dev/null 2>&1
> > > +		loop_dedup_pid=""
> > > +	fi
> > > +
> > > +	# Make sure all fsstress and duperemove processes get killed
> > > +	while [ $((f + d)) -ne 0 ]; do
> > > +		$KILLALL_PROG -q $FSSTRESS_PROG > /dev/null 2>&1
> > > +		$KILLALL_PROG -q $DUPEREMOVE_PROG > /dev/null 2>&1
> > > +		sleep 1
> > > +		f=`ps -eLf | grep $FSSTRESS_PROG | grep -v "grep" | wc -l`
> > > +		d=`ps -eLf | grep $DUPEREMOVE_PROG | grep -v "grep" | wc -l`
> > > +	done
> > > +}
> > > +
> > > +sleep_time=$((50 * TIME_FACTOR))
> > > +
> > > +# Start fsstress
> > > +fsstress_opts="-r -n 1000 -p $((5 * LOAD_FACTOR))"
> > > +$FSSTRESS_PROG $fsstress_opts -d $SCRATCH_MNT -l 0 >> $seqres.full 2>&1 &
> > > +loop_dedup_pid=""
> > > +# Start several dedupe processes on same directory
> > > +for ((i = 0; i < $((2 * LOAD_FACTOR)); i++)); do
> > > +	while true; do
> > > +		$DUPEREMOVE_PROG -dr --dedupe-options=same $SCRATCH_MNT/ \
> > > +			>>$seqres.full 2>&1
> > 
> > /me wonders why not just touch $TEST_DIR/run, have this loop do:
> > 
> > while test -e $TEST_DIR/run; do
> > 	duperemove...
> > done

Thanks for your suggestion :)

> > 
> > and then rm -f $TEST_DIR/run to end the loop?  Then you don't need the
> > complex machinery to shut down the bash loop and kill the fsstress and
> > duperemove processes.
> 
> Yeah, this looks cleaner to me.
> 
> Zorro, could you please take a look and update the test as Darrick
> suggested? Also, you could update the fstests repo and use new 'new'
> script to generate new test template which has correct SPDX tag :)

Sure, I'll do that. /me is going to google what is SPDX ...

Thanks,
Zorro

> 
> > 
> > Otherwise looks decent,
> 
> Thanks for reviewing!
> 
> Eryu
> 
> > 
> > --D
> > 
> > > +	done &
> > > +	loop_dedup_pid="$! $loop_dedup_pid"
> > > +done
> > > +
> > > +# End the test after $sleep_time seconds
> > > +sleep $sleep_time
> > > +kill_all_stress
> > > +
> > > +# umount and mount again, verify pagecache contents don't mutate and a fresh
> > > +# read from the disk also doesn't show mutations.
> > > +find $testdir -type f -exec md5sum {} \; > $TEST_DIR/${seq}md5.sum
> > > +_scratch_cycle_mount
> > > +md5sum -c --quiet $TEST_DIR/${seq}md5.sum
> > > +
> > > +echo "Silence is golden"
> > > +status=0
> > > +exit
> > > diff --git a/tests/shared/010.out b/tests/shared/010.out
> > > new file mode 100644
> > > index 00000000..1d83a8d6
> > > --- /dev/null
> > > +++ b/tests/shared/010.out
> > > @@ -0,0 +1,2 @@
> > > +QA output created by 010
> > > +Silence is golden
> > > diff --git a/tests/shared/group b/tests/shared/group
> > > index 9c484794..094da27d 100644
> > > --- a/tests/shared/group
> > > +++ b/tests/shared/group
> > > @@ -12,6 +12,7 @@
> > >  007 dangerous_fuzzers
> > >  008 auto stress dedupe
> > >  009 auto stress dedupe
> > > +010 auto stress dedupe
> > >  032 mkfs auto quick
> > >  272 auto enospc rw
> > >  289 auto quick
> > > -- 
> > > 2.14.4
> > > 
> > > --
> > > To unsubscribe from this list: send the line "unsubscribe fstests" in
> > > the body of a message to majordomo@vger.kernel.org
> > > More majordomo info at  http://vger.kernel.org/majordomo-info.html
> > --
> > To unsubscribe from this list: send the line "unsubscribe fstests" in
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diff mbox

Patch

diff --git a/tests/shared/010 b/tests/shared/010
new file mode 100755
index 00000000..c449c247
--- /dev/null
+++ b/tests/shared/010
@@ -0,0 +1,111 @@ 
+#! /bin/bash
+# FS QA Test 010
+#
+# Dedup & random I/O race test, do multi-threads fsstress and dedupe on
+# same directory/files
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2018 Red Hat Inc.  All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+	cd /
+	rm -f $tmp.*
+	kill_all_stress
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+. ./common/reflink
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+
+# duperemove only supports btrfs and xfs (with reflink feature).
+# Add other filesystems if it supports more later.
+_supported_fs xfs btrfs
+_supported_os Linux
+_require_scratch_dedupe
+_require_command "$DUPEREMOVE_PROG" duperemove
+_require_command "$KILLALL_PROG" killall
+
+_scratch_mkfs > $seqres.full 2>&1
+_scratch_mount >> $seqres.full 2>&1
+
+function kill_all_stress()
+{
+	local f=1
+	local d=1
+
+	# kill the bash process which loop run duperemove
+	if [ -n "$loop_dedup_pid" ]; then
+		kill $loop_dedup_pid > /dev/null 2>&1
+		wait $loop_dedup_pid > /dev/null 2>&1
+		loop_dedup_pid=""
+	fi
+
+	# Make sure all fsstress and duperemove processes get killed
+	while [ $((f + d)) -ne 0 ]; do
+		$KILLALL_PROG -q $FSSTRESS_PROG > /dev/null 2>&1
+		$KILLALL_PROG -q $DUPEREMOVE_PROG > /dev/null 2>&1
+		sleep 1
+		f=`ps -eLf | grep $FSSTRESS_PROG | grep -v "grep" | wc -l`
+		d=`ps -eLf | grep $DUPEREMOVE_PROG | grep -v "grep" | wc -l`
+	done
+}
+
+sleep_time=$((50 * TIME_FACTOR))
+
+# Start fsstress
+fsstress_opts="-r -n 1000 -p $((5 * LOAD_FACTOR))"
+$FSSTRESS_PROG $fsstress_opts -d $SCRATCH_MNT -l 0 >> $seqres.full 2>&1 &
+loop_dedup_pid=""
+# Start several dedupe processes on same directory
+for ((i = 0; i < $((2 * LOAD_FACTOR)); i++)); do
+	while true; do
+		$DUPEREMOVE_PROG -dr --dedupe-options=same $SCRATCH_MNT/ \
+			>>$seqres.full 2>&1
+	done &
+	loop_dedup_pid="$! $loop_dedup_pid"
+done
+
+# End the test after $sleep_time seconds
+sleep $sleep_time
+kill_all_stress
+
+# umount and mount again, verify pagecache contents don't mutate and a fresh
+# read from the disk also doesn't show mutations.
+find $testdir -type f -exec md5sum {} \; > $TEST_DIR/${seq}md5.sum
+_scratch_cycle_mount
+md5sum -c --quiet $TEST_DIR/${seq}md5.sum
+
+echo "Silence is golden"
+status=0
+exit
diff --git a/tests/shared/010.out b/tests/shared/010.out
new file mode 100644
index 00000000..1d83a8d6
--- /dev/null
+++ b/tests/shared/010.out
@@ -0,0 +1,2 @@ 
+QA output created by 010
+Silence is golden
diff --git a/tests/shared/group b/tests/shared/group
index 9c484794..094da27d 100644
--- a/tests/shared/group
+++ b/tests/shared/group
@@ -12,6 +12,7 @@ 
 007 dangerous_fuzzers
 008 auto stress dedupe
 009 auto stress dedupe
+010 auto stress dedupe
 032 mkfs auto quick
 272 auto enospc rw
 289 auto quick