On Sat, Oct 29, 2011 at 12:48:16AM -0000, Dmitry Monakhov wrote:
> During stress testing we want to cover as much code paths as possible
> fsstress is very good for this purpose. But it has expandable nature
> (disk usage almost continually grow). So once it goes in no ENOSPC
> condition it will be where till the end. But by running 'dd' writers
> in parallel we can regularly trigger ENOSPC but only for a limited
> periods of time because each time it opens the same file with O_TRUNC.
>
> Signed-off-by: Dmitry Monakhov <dmonakhov@xxxxxxxxxx>
>
> ---
> 264 | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
> 264.out | 5 +++
> group | 1 +
> 3 files changed, 92 insertions(+), 0 deletions(-)
> create mode 100755 264
> create mode 100644 264.out
>
> diff --git a/264 b/264
> new file mode 100755
> index 0000000..fc6df23
> --- /dev/null
> +++ b/264
> @@ -0,0 +1,86 @@
> +#! /bin/bash
> +# FSQA Test No. 264
> +#
> +# Run fsstress and ENSPC hitters in parallel, check fs consistency an the end
> +#
> +#-----------------------------------------------------------------------
> +# Copyright (c) 2006 Silicon Graphics, 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
> +#
> +#-----------------------------------------------------------------------
> +#
> +# creator
> +owner=dmonakhov@xxxxxxxxxx
> +
> +seq=`basename $0`
> +echo "QA output created by $seq"
> +
> +here=`pwd`
> +tmp=/tmp/$$
> +status=1 # failure is the default!
> +trap "rm -f $tmp.*; exit \$status" 0 1 2 3 15
> +
> +# get standard environment, filters and checks
> +. ./common.rc
> +. ./common.filter
> +# Disable all sync operations to get higher load
> +FSSTRESS_AVOID="$FSSTRESS_AVOID -ffsync=0 -fsync=0 -ffdatasync=0"
> +_workout()
> +{
> + echo ""
> + echo "Run fsstress"
> + echo ""
> + num_iterations=10
> + enospc_time=2
> + out=$SCRATCH_MNT/fsstress.$$
> + args="-p128 -n999999999 -f setattr=1 $FSSTRESS_AVOID -d $out"
> + echo "fsstress $args" >> $here/$seq.full
> + $FSSTRESS_PROG $args > /dev/null 2>&1 &
> + pid=$!
> + echo "Run dd writers in parallel"
> + for ((i=0; i < num_iterations; i++))
> + do
> + # File will be opened with O_TRUNC each time
> + dd if=/dev/zero of=$SCRATCH_MNT/SPACE_CONSUMER bs=1M count=1 \
> + > /dev/null 2>&1
> + sleep $enospc_time
> + done
> + kill $pid
> + wait $pid
> +}
> +
> +# real QA test starts here
> +_supported_fs generic
> +_supported_os Linux
> +_require_scratch
> +_need_to_be_root
> +
> +umount $SCRATCH_DEV 2>/dev/null
> +_scratch_mkfs_sized $((512 * 1024 * 1024)) >> $seq.full 2>&1
> +_scratch_mount
> +
> +if ! _workout; then
> + umount $SCRATCH_DEV 2>/dev/null
> + exit
> +fi
> +
> +if ! _scratch_unmount; then
> + echo "failed to umount"
> + status=1
> + exit
> +fi
> +_check_scratch_fs
> +status=$?
> +exit
> diff --git a/264.out b/264.out
> new file mode 100644
> index 0000000..81b50e5
> --- /dev/null
> +++ b/264.out
> @@ -0,0 +1,5 @@
> +QA output created by 264
> +
> +Run fsstress
> +
> +Run dd writers in parallel
> diff --git a/group b/group
> index 2a8970c..e79c29b 100644
> --- a/group
> +++ b/group
> @@ -377,3 +377,4 @@ deprecated
> 261 auto quick quota
> 262 auto quick quota
> 263 rw auto quick
> +264 auto rw prealloc ioctl enospc
Looks good to me.
Reviewed-By: Phil White <pwhite@xxxxxxx>
Tested-By: Phil White <pwhite@xxxxxxx>
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