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Make L2ARC tests more robust 

Instead of relying on arbitrary timers after pool export/import or cache
device off/online rely on arcstats. This makes the L2ARC tests more
robust. Also cleanup some functions related to persistent L2ARC.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Adam Moss <c@yotes.com>
Signed-off-by: George Amanakis <gamanakis@gmail.com>
Closes #10983
This commit is contained in:
George Amanakis 2020-10-05 18:29:05 -04:00 committed by GitHub
parent 4e84f67a96
commit a76e4e6761
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
13 changed files with 149 additions and 77 deletions
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17
module/zfs/arc.c
View File

@ -969,7 +969,7 @@ static void l2arc_log_blk_fetch_abort(zio_t *zio);
/* L2ARC persistence block restoration routines. */
static void l2arc_log_blk_restore(l2arc_dev_t *dev,
const l2arc_log_blk_phys_t *lb, uint64_t lb_asize, uint64_t lb_daddr);
const l2arc_log_blk_phys_t *lb, uint64_t lb_asize);
static void l2arc_hdr_restore(const l2arc_log_ent_phys_t *le,
l2arc_dev_t *dev);
@ -9505,8 +9505,6 @@ l2arc_rebuild_vdev(vdev_t *vd, boolean_t reopen)
l2arc_dev_hdr_phys_t *l2dhdr;
uint64_t l2dhdr_asize;
spa_t *spa;
int err;
boolean_t l2dhdr_valid = B_TRUE;
dev = l2arc_vdev_get(vd);
ASSERT3P(dev, !=, NULL);
@ -9535,10 +9533,7 @@ l2arc_rebuild_vdev(vdev_t *vd, boolean_t reopen)
/*
* Read the device header, if an error is returned do not rebuild L2ARC.
*/
if ((err = l2arc_dev_hdr_read(dev)) != 0)
l2dhdr_valid = B_FALSE;
if (l2dhdr_valid && dev->l2ad_log_entries > 0) {
if (l2arc_dev_hdr_read(dev) == 0 && dev->l2ad_log_entries > 0) {
/*
* If we are onlining a cache device (vdev_reopen) that was
* still present (l2arc_vdev_present()) and rebuild is enabled,
@ -9838,7 +9833,7 @@ l2arc_rebuild(l2arc_dev_t *dev)
* L2BLK_GET_PSIZE returns aligned size for log blocks.
*/
uint64_t asize = L2BLK_GET_PSIZE((&lbps[0])->lbp_prop);
l2arc_log_blk_restore(dev, this_lb, asize, lbps[0].lbp_daddr);
l2arc_log_blk_restore(dev, this_lb, asize);
/*
* log block restored, include its pointer in the list of
@ -9918,7 +9913,7 @@ l2arc_rebuild(l2arc_dev_t *dev)
PTR_SWAP(this_lb, next_lb);
this_io = next_io;
next_io = NULL;
}
}
if (this_io != NULL)
l2arc_log_blk_fetch_abort(this_io);
@ -9985,7 +9980,7 @@ l2arc_dev_hdr_read(l2arc_dev_t *dev)
err = zio_wait(zio_read_phys(NULL, dev->l2ad_vdev,
VDEV_LABEL_START_SIZE, l2dhdr_asize, abd,
ZIO_CHECKSUM_LABEL, NULL, NULL, ZIO_PRIORITY_ASYNC_READ,
ZIO_CHECKSUM_LABEL, NULL, NULL, ZIO_PRIORITY_SYNC_READ,
ZIO_FLAG_DONT_CACHE | ZIO_FLAG_CANFAIL |
ZIO_FLAG_DONT_PROPAGATE | ZIO_FLAG_DONT_RETRY |
ZIO_FLAG_SPECULATIVE, B_FALSE));
@ -10156,7 +10151,7 @@ cleanup:
*/
static void
l2arc_log_blk_restore(l2arc_dev_t *dev, const l2arc_log_blk_phys_t *lb,
uint64_t lb_asize, uint64_t lb_daddr)
uint64_t lb_asize)
{
uint64_t size = 0, asize = 0;
uint64_t log_entries = dev->l2ad_log_entries;

39
tests/zfs-tests/include/libtest.shlib
View File

@ -4173,6 +4173,45 @@ function get_arcstat # stat
esac
}
#
# Wait for the specified arcstat to reach non-zero quiescence.
# If echo is 1 echo the value after reaching quiescence, otherwise
# if echo is 0 print the arcstat we are waiting on.
#
function arcstat_quiescence # stat echo
{
typeset stat=$1
typeset echo=$2
typeset do_once=true
if [[ $echo -eq 0 ]]; then
echo "Waiting for arcstat $1 quiescence."
fi
while $do_once || [ $stat1 -ne $stat2 ] || [ $stat2 -eq 0 ]; do
typeset stat1=$(get_arcstat $stat)
sleep 2
typeset stat2=$(get_arcstat $stat)
do_once=false
done
if [[ $echo -eq 1 ]]; then
echo $stat2
fi
}
function arcstat_quiescence_noecho # stat
{
typeset stat=$1
arcstat_quiescence $stat 0
}
function arcstat_quiescence_echo # stat
{
typeset stat=$1
arcstat_quiescence $stat 1
}
#
# Given an array of pids, wait until all processes
# have completed and check their return status.

1
tests/zfs-tests/include/tunables.cfg
View File

@ -59,6 +59,7 @@ MULTIHOST_HISTORY multihost.history zfs_multihost_history
MULTIHOST_IMPORT_INTERVALS multihost.import_intervals zfs_multihost_import_intervals
MULTIHOST_INTERVAL multihost.interval zfs_multihost_interval
OVERRIDE_ESTIMATE_RECORDSIZE send.override_estimate_recordsize zfs_override_estimate_recordsize
PREFETCH_DISABLE prefetch.disable zfs_prefetch_disable
REMOVAL_SUSPEND_PROGRESS removal_suspend_progress zfs_removal_suspend_progress
REMOVE_MAX_SEGMENT remove_max_segment zfs_remove_max_segment
RESILVER_MIN_TIME_MS resilver_min_time_ms zfs_resilver_min_time_ms

14
tests/zfs-tests/tests/functional/l2arc/l2arc_arcstats_pos.ksh
View File

@ -62,27 +62,35 @@ export FILE_SIZE=$(( floor($fill_mb / $NUMJOBS) ))M
log_must truncate -s ${cache_sz}M $VDEV_CACHE
typeset log_blk_start=$(get_arcstat l2_log_blk_writes)
log_must zpool create -f $TESTPOOL $VDEV cache $VDEV_CACHE
log_must fio $FIO_SCRIPTS/mkfiles.fio
log_must fio $FIO_SCRIPTS/random_reads.fio
arcstat_quiescence_noecho l2_size
log_must zpool offline $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
typeset l2_mfu_init=$(get_arcstat l2_mfu_asize)
typeset l2_mru_init=$(get_arcstat l2_mru_asize)
typeset l2_prefetch_init=$(get_arcstat l2_prefetch_asize)
typeset l2_asize_init=$(get_arcstat l2_asize)
log_must zpool online $TESTPOOL $VDEV_CACHE
log_must zpool online $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
log_must zpool export $TESTPOOL
arcstat_quiescence_noecho l2_feeds
log_must test $(get_arcstat l2_mfu_asize) -eq 0
log_must test $(get_arcstat l2_mru_asize) -eq 0
log_must zpool import -d $VDIR $TESTPOOL
arcstat_quiescence_noecho l2_size
log_must fio $FIO_SCRIPTS/random_reads.fio
arcstat_quiescence_noecho l2_size
log_must zpool offline $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
typeset l2_mfu_end=$(get_arcstat l2_mfu_asize)
typeset l2_mru_end=$(get_arcstat l2_mru_asize)
typeset l2_prefetch_end=$(get_arcstat l2_prefetch_asize)

12
tests/zfs-tests/tests/functional/l2arc/l2arc_mfuonly_pos.ksh
View File

@ -49,6 +49,7 @@ function cleanup
log_must set_tunable32 L2ARC_NOPREFETCH $noprefetch
log_must set_tunable32 L2ARC_MFUONLY $mfuonly
log_must set_tunable32 PREFETCH_DISABLE $zfsprefetch
}
log_onexit cleanup
@ -60,6 +61,9 @@ log_must set_tunable32 L2ARC_NOPREFETCH 1
typeset mfuonly=$(get_tunable L2ARC_MFUONLY)
log_must set_tunable32 L2ARC_MFUONLY 1
typeset zfsprefetch=$(get_tunable PREFETCH_DISABLE)
log_must set_tunable32 PREFETCH_DISABLE 1
typeset fill_mb=800
typeset cache_sz=$(( 1.4 * $fill_mb ))
export FILE_SIZE=$(( floor($fill_mb / $NUMJOBS) ))M
@ -75,6 +79,14 @@ log_must fio $FIO_SCRIPTS/random_reads.fio
log_must zpool export $TESTPOOL
log_must zpool import -d $VDIR $TESTPOOL
# Regardless of l2arc_noprefetch, some MFU buffers might be evicted
# from ARC, accessed later on as prefetches and transition to MRU as
# prefetches.
# If accessed again they are counted as MRU and the l2arc_mru_asize arcstat
# will not be 0 (mentioned also in zfs-module-parameters.5)
# For the purposes of this test we mitigate this by disabling (predictive)
# ZFS prefetches with zfs_prefetch_disable=1.
log_must test $(get_arcstat l2_mru_asize) -eq 0
log_must zpool destroy -f $TESTPOOL

17
tests/zfs-tests/tests/functional/l2arc/persist_l2arc_001_pos.ksh
View File

@ -34,7 +34,7 @@
# L2ARC device.
# 6. Import pool.
# 7. Read the amount of log blocks rebuilt in arcstats and compare to
# (4).
# (5).
# 8. Check if the labels of the L2ARC device are intact.
#
# * We can predict the minimum bytes of L2ARC restored if we subtract
@ -83,7 +83,9 @@ log_must zpool import -d $VDIR $TESTPOOL
log_must fio $FIO_SCRIPTS/mkfiles.fio
log_must fio $FIO_SCRIPTS/random_reads.fio
arcstat_quiescence_noecho l2_size
log_must zpool export $TESTPOOL
arcstat_quiescence_noecho l2_feeds
typeset l2_dh_log_blk=$(zdb -l $VDEV_CACHE | grep log_blk_count | \
awk '{print $2}')
@ -91,15 +93,18 @@ typeset l2_dh_log_blk=$(zdb -l $VDEV_CACHE | grep log_blk_count | \
typeset l2_rebuild_log_blk_start=$(get_arcstat l2_rebuild_log_blks)
log_must zpool import -d $VDIR $TESTPOOL
arcstat_quiescence_noecho l2_size
sleep 2
typeset l2_rebuild_log_blk_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
typeset l2_rebuild_log_blk_end=$(get_arcstat l2_rebuild_log_blks)
log_must test $l2_dh_log_blk -eq $(( $l2_rebuild_log_blk_end - $l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk -eq $(( $l2_rebuild_log_blk_end -
$l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk -gt 0
log_must zdb -lll $VDEV_CACHE
log_must zpool offline $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
log_must zdb -lllq $VDEV_CACHE
log_must zpool destroy -f $TESTPOOL

15
tests/zfs-tests/tests/functional/l2arc/persist_l2arc_002_pos.ksh
View File

@ -86,9 +86,9 @@ log_must eval "echo $PASSPHRASE | zfs create -o encryption=on" \
log_must fio $FIO_SCRIPTS/mkfiles.fio
log_must fio $FIO_SCRIPTS/random_reads.fio
arcstat_quiescence_noecho l2_size
log_must zpool export $TESTPOOL
sleep 2
arcstat_quiescence_noecho l2_feeds
typeset l2_dh_log_blk=$(zdb -l $VDEV_CACHE | grep log_blk_count | \
awk '{print $2}')
@ -97,14 +97,17 @@ typeset l2_rebuild_log_blk_start=$(get_arcstat l2_rebuild_log_blks)
log_must zpool import -d $VDIR $TESTPOOL
log_must eval "echo $PASSPHRASE | zfs mount -l $TESTPOOL/$TESTFS1"
arcstat_quiescence_noecho l2_size
sleep 2
typeset l2_rebuild_log_blk_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
typeset l2_rebuild_log_blk_end=$(get_arcstat l2_rebuild_log_blks)
log_must test $l2_dh_log_blk -eq $(( $l2_rebuild_log_blk_end - $l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk -eq $(( $l2_rebuild_log_blk_end - \
$l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk -gt 0
log_must zpool offline $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
log_must zdb -lq $VDEV_CACHE
log_must zpool destroy -f $TESTPOOL

2
tests/zfs-tests/tests/functional/l2arc/persist_l2arc_003_neg.ksh
View File

@ -32,7 +32,7 @@
# 4. Export pool.
# 5. Import pool.
# 6. Check in zpool iostat if the cache device has space allocated.
# 7. Read the file written in (2) and check if l2_hits in
# 7. Read the file written in (3) and check if l2_hits in
# /proc/spl/kstat/zfs/arcstats increased.
#

14
tests/zfs-tests/tests/functional/l2arc/persist_l2arc_004_pos.ksh
View File

@ -33,7 +33,7 @@
# 4. Read amount of log blocks written.
# 5. Import pool.
# 6. Read amount of log blocks built.
# 7. Compare the two amounts
# 7. Compare the two amounts.
# 8. Read the file written in (2) and check if l2_hits in
# /proc/spl/kstat/zfs/arcstats increased.
# 9. Check if the labels of the L2ARC device are intact.
@ -70,12 +70,11 @@ log_must zpool create -f $TESTPOOL $VDEV cache $VDEV_CACHE
log_must fio $FIO_SCRIPTS/mkfiles.fio
log_must fio $FIO_SCRIPTS/random_reads.fio
arcstat_quiescence_noecho l2_size
log_must zpool export $TESTPOOL
sleep 2
arcstat_quiescence_noecho l2_feeds
typeset log_blk_end=$(get_arcstat l2_log_blk_writes)
typeset log_blk_rebuild_start=$(get_arcstat l2_rebuild_log_blks)
log_must zpool import -d $VDIR $TESTPOOL
@ -83,16 +82,19 @@ log_must zpool import -d $VDIR $TESTPOOL
typeset l2_hits_start=$(get_arcstat l2_hits)
log_must fio $FIO_SCRIPTS/random_reads.fio
arcstat_quiescence_noecho l2_size
typeset log_blk_rebuild_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
typeset l2_hits_end=$(get_arcstat l2_hits)
typeset log_blk_rebuild_end=$(get_arcstat l2_rebuild_log_blks)
log_must test $(( $log_blk_rebuild_end - $log_blk_rebuild_start )) -eq \
$(( $log_blk_end - $log_blk_start ))
log_must test $l2_hits_end -gt $l2_hits_start
log_must zpool offline $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
log_must zdb -lq $VDEV_CACHE
log_must zpool destroy -f $TESTPOOL

14
tests/zfs-tests/tests/functional/l2arc/persist_l2arc_005_pos.ksh
View File

@ -36,7 +36,7 @@
# 6. Import pool.
# 7. Mount the encrypted ZFS file system.
# 8. Read amount of log blocks built.
# 9. Compare the two amounts
# 9. Compare the two amounts.
# 10. Read the file written in (3) and check if l2_hits in
# /proc/spl/kstat/zfs/arcstats increased.
# 11. Check if the labels of the L2ARC device are intact.
@ -76,12 +76,11 @@ log_must eval "echo $PASSPHRASE | zfs create -o encryption=on" \
log_must fio $FIO_SCRIPTS/mkfiles.fio
log_must fio $FIO_SCRIPTS/random_reads.fio
arcstat_quiescence_noecho l2_size
log_must zpool export $TESTPOOL
sleep 2
arcstat_quiescence_noecho l2_feeds
typeset log_blk_end=$(get_arcstat l2_log_blk_writes)
typeset log_blk_rebuild_start=$(get_arcstat l2_rebuild_log_blks)
log_must zpool import -d $VDIR $TESTPOOL
@ -90,16 +89,19 @@ log_must eval "echo $PASSPHRASE | zfs mount -l $TESTPOOL/$TESTFS1"
typeset l2_hits_start=$(get_arcstat l2_hits)
log_must fio $FIO_SCRIPTS/random_reads.fio
arcstat_quiescence_noecho l2_size
typeset log_blk_rebuild_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
typeset l2_hits_end=$(get_arcstat l2_hits)
typeset log_blk_rebuild_end=$(get_arcstat l2_rebuild_log_blks)
log_must test $(( $log_blk_rebuild_end - $log_blk_rebuild_start )) -eq \
$(( $log_blk_end - $log_blk_start ))
log_must test $l2_hits_end -gt $l2_hits_start
log_must zpool offline $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
log_must zdb -lq $VDEV_CACHE
log_must zpool destroy -f $TESTPOOL

17
tests/zfs-tests/tests/functional/l2arc/persist_l2arc_006_pos.ksh
View File

@ -71,26 +71,29 @@ log_must zpool create -f $TESTPOOL $VDEV cache $VDEV_CACHE
log_must fio $FIO_SCRIPTS/mkfiles.fio
log_must fio $FIO_SCRIPTS/random_reads.fio
arcstat_quiescence_noecho l2_size
log_must zpool offline $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
log_must zpool export $TESTPOOL
sleep 5
arcstat_quiescence_noecho l2_feeds
typeset l2_rebuild_log_blk_start=$(get_arcstat l2_rebuild_log_blks)
typeset l2_dh_log_blk=$(zdb -l $VDEV_CACHE | grep log_blk_count | \
awk '{print $2}')
log_must zpool import -d $VDIR $TESTPOOL
log_must zpool online $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
sleep 5
typeset l2_rebuild_log_blk_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
typeset l2_rebuild_log_blk_end=$(get_arcstat l2_rebuild_log_blks)
log_must test $l2_dh_log_blk -eq $(( $l2_rebuild_log_blk_end - $l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk -eq $(( $l2_rebuild_log_blk_end - \
$l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk -gt 0
log must zpool offline $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
log_must zdb -lq $VDEV_CACHE
log_must zpool destroy -f $TESTPOOL

22
tests/zfs-tests/tests/functional/l2arc/persist_l2arc_007_pos.ksh
View File

@ -28,12 +28,12 @@
# STRATEGY:
# 1. Create pool with a cache device.
# 2. Create a random file in that pool and random read for 10 sec.
# 3. Read the amount of log blocks written from the header of the
# 3. Offline the L2ARC device.
# 4. Read the amount of log blocks written from the header of the
# L2ARC device.
# 4. Offline the L2ARC device.
# 5. Online the L2ARC device.
# 6. Read the amount of log blocks rebuilt in arcstats and compare to
# (3).
# (4).
# 7. Check if the labels of the L2ARC device are intact.
#
@ -70,24 +70,26 @@ log_must zpool create -f $TESTPOOL $VDEV cache $VDEV_CACHE
log_must fio $FIO_SCRIPTS/mkfiles.fio
log_must fio $FIO_SCRIPTS/random_reads.fio
arcstat_quiescence_noecho l2_size
log_must zpool offline $TESTPOOL $VDEV_CACHE
sleep 10
arcstat_quiescence_noecho l2_size
typeset l2_rebuild_log_blk_start=$(get_arcstat l2_rebuild_log_blks)
typeset l2_dh_log_blk=$(zdb -l $VDEV_CACHE | grep log_blk_count | \
awk '{print $2}')
log_must zpool online $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
sleep 10
typeset l2_rebuild_log_blk_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
typeset l2_rebuild_log_blk_end=$(get_arcstat l2_rebuild_log_blks)
log_must test $l2_dh_log_blk -eq $(( $l2_rebuild_log_blk_end - $l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk -eq $(( $l2_rebuild_log_blk_end - \
$l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk -gt 0
log_must zpool offline $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
log_must zdb -lq $VDEV_CACHE
log_must zpool destroy -f $TESTPOOL

42
tests/zfs-tests/tests/functional/l2arc/persist_l2arc_008_pos.ksh
View File

@ -40,7 +40,7 @@
# 9. Offline the L2ARC device.
# 10. Online the L2ARC device.
# 11. Read the amount of log blocks rebuilt in arcstats and compare to
# (7).
# (8).
# 12. Check if the amount of log blocks on the cache device has
# increased.
# 13. Export the pool.
@ -80,62 +80,62 @@ log_must zpool create -f $TESTPOOL $VDEV cache $VDEV_CACHE
log_must fio $FIO_SCRIPTS/mkfiles.fio
log_must fio $FIO_SCRIPTS/random_reads.fio
arcstat_quiescence_noecho l2_size
log_must zpool offline $TESTPOOL $VDEV_CACHE
sleep 2
arcstat_quiescence_noecho l2_size
typeset l2_dh_log_blk1=$(zdb -l $VDEV_CACHE | grep log_blk_count | \
awk '{print $2}')
typeset l2_rebuild_log_blk_start=$(get_arcstat l2_rebuild_log_blks)
log_must zpool online $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
sleep 5
typeset l2_rebuild_log_blk_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
typeset l2_rebuild_log_blk_end=$(get_arcstat l2_rebuild_log_blks)
log_must test $l2_dh_log_blk1 -eq $(( $l2_rebuild_log_blk_end - $l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk1 -eq $(( $l2_rebuild_log_blk_end - \
$l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk1 -gt 0
log_must fio $FIO_SCRIPTS/mkfiles.fio
log_must fio $FIO_SCRIPTS/random_reads.fio
arcstat_quiescence_noecho l2_size
log_must zpool offline $TESTPOOL $VDEV_CACHE
sleep 2
arcstat_quiescence_noecho l2_size
typeset l2_dh_log_blk2=$(zdb -l $VDEV_CACHE | grep log_blk_count | \
awk '{print $2}')
typeset l2_rebuild_log_blk_start=$(get_arcstat l2_rebuild_log_blks)
log_must zpool online $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
sleep 5
typeset l2_rebuild_log_blk_end=$(get_arcstat l2_rebuild_log_blks)
log_must test $l2_dh_log_blk2 -eq $(( $l2_rebuild_log_blk_end - $l2_rebuild_log_blk_start ))
typeset l2_rebuild_log_blk_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
log_must test $l2_dh_log_blk2 -eq $(( $l2_rebuild_log_blk_end - \
$l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk2 -gt $l2_dh_log_blk1
log_must zpool export $TESTPOOL
arcstat_quiescence_noecho l2_feeds
typeset l2_dh_log_blk3=$(zdb -l $VDEV_CACHE | grep log_blk_count | \
awk '{print $2}')
typeset l2_rebuild_log_blk_start=$(get_arcstat l2_rebuild_log_blks)
log_must zpool import -d $VDIR $TESTPOOL
arcstat_quiescence_noecho l2_size
sleep 5
typeset l2_rebuild_log_blk_end=$(arcstat_quiescence_echo l2_rebuild_log_blks)
typeset l2_rebuild_log_blk_end=$(get_arcstat l2_rebuild_log_blks)
log_must test $l2_dh_log_blk3 -eq $(( $l2_rebuild_log_blk_end - $l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk3 -eq $(( $l2_rebuild_log_blk_end - \
$l2_rebuild_log_blk_start ))
log_must test $l2_dh_log_blk3 -gt 0
log must zpool offline $TESTPOOL $VDEV_CACHE
arcstat_quiescence_noecho l2_size
log_must zdb -lq $VDEV_CACHE
log_must zpool destroy -f $TESTPOOL