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xfstests: add background noise to test 276 (btrfs backref resolving)

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The backref resolver test for btrfs was run on a static file system so far.
Resolving backrefs on a busy file system is what happens in reality and that
is what should be checked by this test.

I added a parameter such that the script can easily be changed to the former
behavior for development purposes.

Furthermore, this increases two constants which make the test simply cycle a
few seconds longer, increasing the chance to hit on something suspicious in
case we broke something.

Signed-off-by: Jan Schmidt <list.btrfs@jan-o-sch.net>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Rich Johnston <rjohnston@sgi.com>
This commit is contained in:
Jan Schmidt
2013-03-19 16:24:20 +00:00
committed by Rich Johnston
parent 5cc810fb3c
commit cfe73f711e
1 changed files with 26 additions and 3 deletions
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276
+26 -3
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@@ -33,9 +33,16 @@ echo "QA output created by $seq"
here=`pwd`
tmp=/tmp/$$
status=1
noise_pid=0
_cleanup()
{
if [ $noise_pid -ne 0 ]; then
echo "background noise kill $noise_pid" >>$seq.full
kill $noise_pid
noise_pid=0
wait
fi
echo "*** unmount"
umount $SCRATCH_MNT 2>/dev/null
rm -f $tmp.*
@@ -171,6 +178,7 @@ workout()
nfiles=$2
procs=$3
snap_name=$4
do_bg_noise=$5
umount $SCRATCH_DEV >/dev/null 2>&1
echo "*** mkfs -dsize=$fsz" >>$seq.full
@@ -179,7 +187,7 @@ workout()
|| _fail "size=$fsz mkfs failed"
run_check _scratch_mount
# -w ensures that the only ops are ones which cause write I/O
run_check $FSSTRESS_PROG -d $SCRATCH_MNT -w -p $procs -n 1000 \
run_check $FSSTRESS_PROG -d $SCRATCH_MNT -w -p $procs -n 2000 \
$FSSTRESS_AVOID
run_check $BTRFS_UTIL_PROG subvol snap $SCRATCH_MNT \
@@ -190,9 +198,10 @@ workout()
# make some noise but ensure we're not touching existing data
# extents.
run_check $FSSTRESS_PROG -d $SCRATCH_MNT -p $procs -n 2000 \
run_check $FSSTRESS_PROG -d $SCRATCH_MNT -p $procs -n 4000 \
-z -f chown=3 -f link=1 -f mkdir=2 -f mknod=2 \
-f rename=2 -f setxattr=1 -f symlink=2
clean_dir="$SCRATCH_MNT/next"
mkdir $clean_dir
# now make more files to get a higher tree
@@ -201,6 +210,18 @@ workout()
run_check umount $SCRATCH_DEV >/dev/null 2>&1
run_check _scratch_mount "-o atime"
if [ $do_bg_noise -ne 0 ]; then
# make background noise while backrefs are being walked
while /bin/true; do
echo background fsstress >>$seq.full
run_check $FSSTRESS_PROG -d $SCRATCH_MNT/bgnoise -n 999
echo background rm >>$seq.full
rm -rf $SCRATCH_MNT/bgnoise/
done &
noise_pid=`jobs -p %1`
echo "background noise by $noise_pid" >>$seq.full
fi
cnt=0
errcnt=0
dir="$SCRATCH_MNT/$snap_name/"
@@ -230,6 +251,7 @@ workout()
break
fi
done
if [ $errcnt -gt 0 ]; then
_fail "test failed: $errcnt error(s)"
fi
@@ -241,8 +263,9 @@ snap_name="snap1"
filesize=`expr 2000 \* 1024 \* 1024`
nfiles=4
numprocs=1
do_bg_noise=1
workout $filesize $nfiles $numprocs $snap_name
workout $filesize $nfiles $numprocs $snap_name $do_bg_noise
echo "*** done"
status=0