X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Ftests%2Fsanityn.sh;h=1618b82391ec26289bcf9544e428ee554f26a0c2;hp=ec90471d8ca4185381c250def9d15d1a2f0c2ed4;hb=e16e3d46ee8c44e691c5cd3d25161f2f297fa0fd;hpb=9d49453b675fba97002a2553769be89800783db3

diff --git a/lustre/tests/sanityn.sh b/lustre/tests/sanityn.sh
index ec90471..1618b82 100755
--- a/lustre/tests/sanityn.sh
+++ b/lustre/tests/sanityn.sh
@@ -3,44 +3,35 @@
 set -e
 
 ONLY=${ONLY:-"$*"}
-# bug number for skipped test: 9977/LU-7105
-ALWAYS_EXCEPT="                28           $SANITYN_EXCEPT"
-# UPDATE THE COMMENT ABOVE WITH BUG NUMBERS WHEN CHANGING ALWAYS_EXCEPT!
-
-SRCDIR=$(dirname $0)
-PATH=$PWD/$SRCDIR:$SRCDIR:$SRCDIR/../utils:$PATH
 
 SIZE=${SIZE:-40960}
-CHECKSTAT=${CHECKSTAT:-"checkstat -v"}
 OPENFILE=${OPENFILE:-openfile}
 OPENUNLINK=${OPENUNLINK:-openunlink}
-export MULTIOP=${MULTIOP:-multiop}
 export TMP=${TMP:-/tmp}
 MOUNT_2=${MOUNT_2:-"yes"}
 CHECK_GRANT=${CHECK_GRANT:-"yes"}
 GRANT_CHECK_LIST=${GRANT_CHECK_LIST:-""}
 
-SAVE_PWD=$PWD
-
-export NAME=${NAME:-local}
-
-LUSTRE=${LUSTRE:-`dirname $0`/..}
+LUSTRE=${LUSTRE:-$(dirname $0)/..}
 . $LUSTRE/tests/test-framework.sh
-CLEANUP=${CLEANUP:-:}
-SETUP=${SETUP:-:}
 init_test_env $@
-. ${CONFIG:=$LUSTRE/tests/cfg/$NAME.sh}
 init_logging
 
-if [ $(facet_fstype $SINGLEMDS) = "zfs" ]; then
-# bug number for skipped test:
-	ALWAYS_EXCEPT="$ALWAYS_EXCEPT "
-# LU-2829 / LU-2887 - make allowances for ZFS slowness
+ALWAYS_EXCEPT="$SANITYN_EXCEPT "
+# bug number for skipped test:  LU-7105
+ALWAYS_EXCEPT+="                28"
+# UPDATE THE COMMENT ABOVE WITH BUG NUMBERS WHEN CHANGING ALWAYS_EXCEPT!
+
+if [ $mds1_FSTYPE = "zfs" ]; then
+	# LU-2829 / LU-2887 - make allowances for ZFS slowness
 	TEST33_NFILES=${TEST33_NFILES:-1000}
 fi
+
 #                                  23   (min)"
 [ "$SLOW" = "no" ] && EXCEPT_SLOW="33a"
 
+build_test_filter
+
 FAIL_ON_ERROR=false
 
 SETUP=${SETUP:-:}
@@ -61,8 +52,6 @@ dd if=/dev/urandom of=$SAMPLE_FILE bs=1M count=1
 
 check_runas_id $RUNAS_ID $RUNAS_GID $RUNAS
 
-build_test_filter
-
 test_1() {
 	touch $DIR1/$tfile
 	[ -f $DIR2/$tfile ] || error "Check create"
@@ -315,65 +304,52 @@ test_14aa() {
 	MULTIPID=$!
 
 	$DIR2/$tdir/$tfile && error || true
-	kill -USR1 $MULTIPID
-	wait $MULTIPID || return 2
+	kill $MULTIPID
 }
 run_test 14aa "execution of file open for write returns -ETXTBSY"
 
 test_14ab() {
 	test_mkdir $DIR1/$tdir
-	cp -p $(which multiop) $DIR1/$tdir/multiop || error "cp failed"
-	MULTIOP_PROG=$DIR1/$tdir/multiop multiop_bg_pause $TMP/$tfile O_c ||
-		return 1
-	MULTIOP_PID=$!
-	$MULTIOP $DIR2/$tdir/multiop Oc && error "expected error, got success"
-	kill -USR1 $MULTIOP_PID || return 2
-	wait $MULTIOP_PID || return 3
-	rm $TMP/$tfile $DIR1/$tdir/multiop || error "removing multiop"
+	cp -p $(which sleep) $DIR1/$tdir/sleep || error "cp failed"
+	$DIR1/$tdir/sleep 60 &
+	SLEEP_PID=$!
+	$MULTIOP $DIR2/$tdir/sleep Oc && error "expected error, got success"
+	kill $SLEEP_PID
 }
 run_test 14ab "open(RDWR) of executing file returns -ETXTBSY"
 
 test_14b() { # bug 3192, 7040
 	test_mkdir $DIR1/$tdir
-	cp -p $(which multiop) $DIR1/$tdir/multiop || error "cp failed"
-	MULTIOP_PROG=$DIR1/$tdir/multiop multiop_bg_pause $TMP/$tfile O_c ||
-		return 1
-	MULTIOP_PID=$!
-	$TRUNCATE $DIR2/$tdir/multiop 0 && kill -9 $MULTIOP_PID && \
+	cp -p $(which sleep) $DIR1/$tdir/sleep || error "cp failed"
+	$DIR1/$tdir/sleep 60 &
+	SLEEP_PID=$!
+	$TRUNCATE $DIR2/$tdir/sleep 60 && kill -9 $SLEEP_PID && \
 		error "expected truncate error, got success"
-	kill -USR1 $MULTIOP_PID || return 2
-	wait $MULTIOP_PID || return 3
-	cmp $(which multiop) $DIR1/$tdir/multiop || error "binary changed"
-	rm $TMP/$tfile $DIR1/$tdir/multiop || error "removing multiop"
+	kill $SLEEP_PID
+	cmp $(which sleep) $DIR1/$tdir/sleep || error "binary changed"
 }
 run_test 14b "truncate of executing file returns -ETXTBSY ======"
 
 test_14c() { # bug 3430, 7040
 	test_mkdir $DIR1/$tdir
-	cp -p $(which multiop) $DIR1/$tdir/multiop || error "cp failed"
-	MULTIOP_PROG=$DIR1/$tdir/multiop multiop_bg_pause $TMP/$tfile O_c ||
-		return 1
-	MULTIOP_PID=$!
-	cp /etc/hosts $DIR2/$tdir/multiop && error "expected error, got success"
-	kill -USR1 $MULTIOP_PID || return 2
-	wait $MULTIOP_PID || return 3
-	cmp $(which multiop) $DIR1/$tdir/multiop || error "binary changed"
-	rm $TMP/$tfile $DIR1/$tdir/multiop || error "removing multiop"
+	cp -p $(which sleep) $DIR1/$tdir/sleep || error "cp failed"
+	$DIR1/$tdir/sleep 60 &
+	SLEEP_PID=$!
+	cp /etc/hosts $DIR2/$tdir/sleep && error "expected error, got success"
+	kill $SLEEP_PID
+	cmp $(which sleep) $DIR1/$tdir/sleep || error "binary changed"
 }
 run_test 14c "open(O_TRUNC) of executing file return -ETXTBSY =="
 
 test_14d() { # bug 10921
 	test_mkdir $DIR1/$tdir
-	cp -p $(which multiop) $DIR1/$tdir/multiop || error "cp failed"
-	MULTIOP_PROG=$DIR1/$tdir/multiop multiop_bg_pause $TMP/$tfile O_c ||
-		return 1
-	MULTIOP_PID=$!
+	cp -p $(which sleep) $DIR1/$tdir/sleep || error "cp failed"
+	$DIR1/$tdir/sleep 60 &
+	SLEEP_PID=$!
 	log chmod
-	chmod 600 $DIR1/$tdir/multiop || error "chmod failed"
-	kill -USR1 $MULTIOP_PID || return 2
-	wait $MULTIOP_PID || return 3
-	cmp $(which multiop) $DIR1/$tdir/multiop || error "binary changed"
-	rm $TMP/$tfile $DIR1/$tdir/multiop || error "removing multiop"
+	chmod 600 $DIR1/$tdir/sleep || error "chmod failed"
+	kill $SLEEP_PID
+	cmp $(which sleep) $DIR1/$tdir/sleep || error "binary changed"
 }
 run_test 14d "chmod of executing file is still possible ========"
 
@@ -381,7 +357,7 @@ test_15() {	# bug 974 - ENOSPC
 	echo "PATH=$PATH"
 	sh oos2.sh $MOUNT1 $MOUNT2
 	wait_delete_completed
-	grant_error=`dmesg | grep "> available"`
+	grant_error=$(dmesg | grep "< tot_grant")
 	[ -z "$grant_error" ] || error "$grant_error"
 }
 run_test 15 "test out-of-space with multiple writers ==========="
@@ -390,7 +366,7 @@ COUNT=${COUNT:-2500}
 # The FSXNUM reduction for ZFS is needed until ORI-487 is fixed.
 # We don't want to skip it entirely, but ZFS is VERY slow and cannot
 # pass a 2500 operation dual-mount run within the time limit.
-if [ "$(facet_fstype ost1)" = "zfs" ]; then
+if [ "$ost1_FSTYPE" = "zfs" ]; then
 	FSXNUM=$((COUNT / 5))
 	FSXP=1
 elif [ "$SLOW" = "yes" ]; then
@@ -428,21 +404,100 @@ run_test 16a "$FSXNUM iterations of dual-mount fsx"
 test_16b() {
 	local file1=$DIR1/$tfile
 	local file2=$DIR2/$tfile
+	local stripe_size=($($LFS getstripe -S $DIR))
 
 	# to allocate grant because it may run out due to test_15.
 	lfs setstripe -c -1 $file1
-	dd if=/dev/zero of=$file1 bs=$STRIPE_BYTES count=$OSTCOUNT oflag=sync
-	dd if=/dev/zero of=$file2 bs=$STRIPE_BYTES count=$OSTCOUNT oflag=sync
+	dd if=/dev/zero of=$file1 bs=$stripe_size count=$OSTCOUNT oflag=sync ||
+		error "dd failed writing to file=$file1"
+	dd if=/dev/zero of=$file2 bs=$stripe_size count=$OSTCOUNT oflag=sync ||
+		error "dd failed writing to file=$file2"
 	rm -f $file1
 
 	lfs setstripe -c -1 $file1 # b=10919
 	# -o is set to 8192 because writes < 1 page and between 1 and 2 pages
 	# create a mix of tiny writes & normal writes
 	fsx -c 50 -p $FSXP -N $FSXNUM -l $((SIZE * 256)) -o 8192 -S 0 $file1 \
-	$file2
+	$file2 || error "fsx with tiny write failed."
 }
 run_test 16b "$FSXNUM iterations of dual-mount fsx at small size"
 
+test_16c() {
+	local file1=$DIR1/$tfile
+	local file2=$DIR2/$tfile
+	local stripe_size=$(do_facet $SINGLEMDS \
+		"$LCTL get_param -n lod.$(facet_svc $SINGLEMDS)*.stripesize")
+
+	[ "$ost1_FSTYPE" != ldiskfs ] && skip "dio on ldiskfs only"
+
+	# to allocate grant because it may run out due to test_15.
+	$LFS setstripe -c -1 $file1
+	dd if=/dev/zero of=$file1 bs=$stripe_size count=$OSTCOUNT oflag=sync
+	dd if=/dev/zero of=$file2 bs=$stripe_size count=$OSTCOUNT oflag=sync
+	rm -f $file1
+	wait_delete_completed
+
+	local list=$(comma_list $(osts_nodes))
+	if ! get_osd_param $list '' read_cache_enable >/dev/null; then
+		skip "not cache-capable obdfilter"
+	fi
+
+	set_osd_param $list '' read_cache_enable 0
+	set_osd_param $list '' writethrough_cache_enable 0
+
+	$LFS setstripe -c -1 $file1 # b=10919
+	fsx -c 50 -p $FSXP -N $FSXNUM -l $((SIZE * 256)) -S 0 $file1 $file2 \
+		|| error "fsx failed"
+	rm -f $file1
+
+	set_osd_param $list '' read_cache_enable 1
+	set_osd_param $list '' writethrough_cache_enable 1
+
+	return 0
+}
+run_test 16c "verify data consistency on ldiskfs with cache disabled (b=17397)"
+
+test_16d() {
+	local file1=$DIR1/$tfile
+	local file2=$DIR2/$tfile
+	local file3=$DIR1/file
+	local stripe_size=$(do_facet $SINGLEMDS \
+		"$LCTL get_param -n lod.$(facet_svc $SINGLEMDS)*.stripesize")
+
+	# to allocate grant because it may run out due to test_15.
+	$LFS setstripe -c -1 $file1
+	dd if=/dev/zero of=$file1 bs=$stripe_size count=$OSTCOUNT oflag=sync
+	dd if=/dev/zero of=$file2 bs=$stripe_size count=$OSTCOUNT oflag=sync
+	rm -f $file1
+
+	local tmpfile=`mktemp`
+	$LFS setstripe -c -1 $file1 # b=10919
+	$LCTL set_param ldlm.namespaces.*.lru_size=clear
+	
+	# direct write on one client and direct read from another
+	dd if=/dev/urandom of=$file1 bs=1M count=100 oflag=direct
+	dd if=$file2 of=$tmpfile iflag=direct bs=1M
+	diff $file1 $tmpfile || error "file different(1)"
+	rm -f $file1
+
+	# buffer write on one client, but direct read from another
+	dd if=$tmpfile of=$file1 bs=1M count=100
+	dd if=$file2 of=$file3 bs=1M iflag=direct count=100
+	diff $file3 $tmpfile || error "file different(2)"
+
+	rm -f $file3 $file2 $file1
+	# direct write on one client
+	dd if=$tmpfile of=$file1 bs=1M count=100 oflag=direct
+	# buffer read from another client
+	dd if=$file2 of=$file3 bs=1M count=100
+	diff $file3 $tmpfile || error "file different(3)"
+
+	rm -f $file1 $file2 $file3 $tmpfile
+
+}
+run_test 16d "Verify DIO and buffer IO with two clients"
+
+
 test_17() { # bug 3513, 3667
 	remote_ost_nodsh && skip "remote OST with nodsh" && return
 
@@ -480,13 +535,10 @@ test_19() { # bug3811
 	[ "x$DOM" = "xyes" ] && node=$(facet_active_host $SINGLEMDS)
 
 	# check whether obdfilter is cache capable at all
-	if ! get_osd_param $node '' read_cache_enable >/dev/null; then
-		echo "not cache-capable obdfilter"
-		return 0
-	fi
+	get_osd_param $node '' read_cache_enable >/dev/null ||
+		skip "not cache-capable obdfilter"
 
-	local MAX=$(get_osd_param $node '' readcache_max_filesize | \
-		    head -n 1)
+	local MAX=$(get_osd_param $node '' readcache_max_filesize | head -n 1)
 	set_osd_param $node '' readcache_max_filesize 4096
 	dd if=/dev/urandom of=$TMP/$tfile bs=512k count=32
 	local SUM=$(cksum $TMP/$tfile | cut -d" " -f 1,2)
@@ -780,11 +832,13 @@ enable_lockless_truncate() {
 }
 
 test_32a() { # bug 11270
-	local p="$TMP/$TESTSUITE-$TESTNAME.parameters"
+	local save="$TMP/$TESTSUITE-$TESTNAME.parameters"
 	local stripe_size=$(do_facet $SINGLEMDS \
 		"$LCTL get_param -n lod.$(facet_svc $SINGLEMDS)*.stripesize")
 
-	save_lustre_params client "$OSC.*.lockless_truncate" > $p
+	save_lustre_params client "$OSC.*.lockless_truncate" > $save
+	# restore lockless_truncate default values on exit
+	stack_trap "restore_lustre_params < $save; rm -f $save" EXIT
 	cancel_lru_locks $OSC
 	enable_lockless_truncate 1
 	rm -f $DIR1/$tfile
@@ -812,10 +866,7 @@ test_32a() { # bug 11270
 	$CHECKSTAT -s 3000000 $DIR1/$tfile || error "wrong file size"
 	[ $(calc_stats $OSC.*.${OSC}_stats lockless_truncate) -eq 0 ] ||
 		error "lockless truncate disabling failed"
-	rm $DIR1/$tfile
-	# restore lockless_truncate default values
-	restore_lustre_params < $p
-	rm -f $p
+	rm -f $DIR1/$tfile
 }
 run_test 32a "lockless truncate"
 
@@ -893,52 +944,52 @@ print_jbd_stat () {
 
 # commit on sharing tests
 test_33a() {
-    remote_mds_nodsh && skip "remote MDS with nodsh" && return
+	remote_mds_nodsh && skip "remote MDS with nodsh" && return
 
-    [ -z "$CLIENTS" ] && skip "Need two or more clients, have $CLIENTS" && return 0
-    [ $CLIENTCOUNT -lt 2 ] &&
-	skip "Need two or more clients, have $CLIENTCOUNT" && return 0
+	[ -z "$CLIENTS" ] && skip "Need two or more clients, have $CLIENTS"
+	[ $CLIENTCOUNT -lt 2 ] &&
+		skip "Need two or more clients, have $CLIENTCOUNT"
 
-    local nfiles=${TEST33_NFILES:-10000}
-    local param_file=$TMP/$tfile-params
-    local fstype=$(facet_fstype $SINGLEMDS)
+	local nfiles=${TEST33_NFILES:-10000}
+	local param_file=$TMP/$tfile-params
+	local COS
+	local jbdold="N/A"
+	local jbdnew="N/A"
+	local jbd
 
 	save_lustre_params $(get_facets MDS) \
 		"mdt.*.commit_on_sharing" > $param_file
 
-    local COS
-    local jbdold="N/A"
-    local jbdnew="N/A"
-    local jbd
-
-    for COS in 0 1; do
-        do_facet $SINGLEMDS lctl set_param mdt.*.commit_on_sharing=$COS
-        avgjbd=0
-        avgtime=0
-        for i in 1 2 3; do
-            do_nodes $CLIENT1,$CLIENT2 "mkdir -p $DIR1/$tdir-\\\$(hostname)-$i"
-
-            [ $fstype = ldiskfs ] && jbdold=$(print_jbd_stat)
-            echo "=== START createmany old: $jbdold transaction"
-            local elapsed=$(do_and_time "do_nodes $CLIENT1,$CLIENT2 createmany -o $DIR1/$tdir-\\\$(hostname)-$i/f- -r$DIR2/$tdir-\\\$(hostname)-$i/f- $nfiles > /dev/null 2>&1")
-            [ $fstype = ldiskfs ] && jbdnew=$(print_jbd_stat)
-            [ $fstype = ldiskfs ] && jbd=$(( jbdnew - jbdold ))
-            echo "=== END   createmany new: $jbdnew transaction :  $jbd transactions  nfiles $nfiles time $elapsed COS=$COS"
-            [ $fstype = ldiskfs ] && avgjbd=$(( avgjbd + jbd ))
-            avgtime=$(( avgtime + elapsed ))
-        done
-        eval cos${COS}_jbd=$((avgjbd / 3))
-        eval cos${COS}_time=$((avgtime / 3))
-    done
+	for COS in 0 1; do
+		do_facet $SINGLEMDS lctl set_param mdt.*.commit_on_sharing=$COS
+		avgjbd=0
+		avgtime=0
+		for i in 1 2 3; do
+			do_nodes $CLIENT1,$CLIENT2 "mkdir -p $DIR1/$tdir-\\\$(hostname)-$i"
+
+		[ "$mds1_FSTYPE" = ldiskfs ] && jbdold=$(print_jbd_stat)
+		echo "=== START createmany old: $jbdold transaction"
+		local elapsed=$(do_and_time "do_nodes $CLIENT1,$CLIENT2 createmany -o $DIR1/$tdir-\\\$(hostname)-$i/f- -r$DIR2/$tdir-\\\$(hostname)-$i/f- $nfiles > /dev/null 2>&1")
+		[ "$mds1_FSTYPE" = ldiskfs ] && jbdnew=$(print_jbd_stat)
+		[ "$mds1_FSTYPE" = ldiskfs ] && jbd=$(( jbdnew - jbdold ))
+		echo "=== END   createmany new: $jbdnew transaction :  $jbd transactions  nfiles $nfiles time $elapsed COS=$COS"
+		[ "$mds1_FSTYPE" = ldiskfs ] && avgjbd=$(( avgjbd + jbd ))
+		avgtime=$(( avgtime + elapsed ))
+		done
+	eval cos${COS}_jbd=$((avgjbd / 3))
+	eval cos${COS}_time=$((avgtime / 3))
+	done
 
-    echo "COS=0 transactions (avg): $cos0_jbd  time (avg): $cos0_time"
-    echo "COS=1 transactions (avg): $cos1_jbd  time (avg): $cos1_time"
-    [ "$cos0_jbd" != 0 ] && echo "COS=1 vs COS=0 jbd:  $((((cos1_jbd/cos0_jbd - 1)) * 100 )) %"
-    [ "$cos0_time" != 0 ] && echo "COS=1 vs COS=0 time: $((((cos1_time/cos0_time - 1)) * 100 )) %"
+	echo "COS=0 transactions (avg): $cos0_jbd  time (avg): $cos0_time"
+	echo "COS=1 transactions (avg): $cos1_jbd  time (avg): $cos1_time"
+	[ "$cos0_jbd" != 0 ] &&
+		echo "COS=1 vs COS=0 jbd:  $((((cos1_jbd/cos0_jbd - 1)) * 100 )) %"
+	[ "$cos0_time" != 0 ] &&
+		echo "COS=1 vs COS=0 time: $((((cos1_time/cos0_time - 1)) * 100 )) %"
 
-    restore_lustre_params < $param_file
-    rm -f $param_file
-    return 0
+	restore_lustre_params < $param_file
+	rm -f $param_file
+	return 0
 }
 run_test 33a "commit on sharing, cross crete/delete, 2 clients, benchmark"
 
@@ -1003,9 +1054,9 @@ test_33b() {
 run_test 33b "COS: cross create/delete, 2 clients, benchmark under remote dir"
 
 test_33c() {
-	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.7.63) ] &&
-		skip "DNE CoS not supported" && return
+	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs"
+	[ "$MDS1_VERSION" -lt $(version_code 2.7.63) ] &&
+		skip "DNE CoS not supported"
 
 	local sync_count
 
@@ -1061,9 +1112,9 @@ op_trigger_cos() {
 }
 
 test_33d() {
-	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.7.63) ] &&
-		skip "DNE CoS not supported" && return
+	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs"
+	[ "$MDS1_VERSION" -lt $(version_code 2.7.63) ] &&
+		skip "DNE CoS not supported"
 
 	# remote directory create
 	op_trigger_cos "mkdir $DIR/$tdir" "$LFS mkdir -i 1 $DIR/$tdir/subdir"
@@ -1098,13 +1149,12 @@ test_33d() {
 run_test 33d "DNE distributed operation should trigger COS"
 
 test_33e() {
-	[ -n "$CLIENTS" ] || { skip "Need two or more clients" && return 0; }
+	[ -n "$CLIENTS" ] || skip "Need two or more clients"
 	[ $CLIENTCOUNT -ge 2 ] ||
-		{ skip "Need two or more clients, have $CLIENTCOUNT" &&
-								return 0; }
-	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.7.63) ] &&
-		skip "DNE CoS not supported" && return
+		skip "Need two or more clients, have $CLIENTCOUNT"
+	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs"
+	[ "$MDS1_VERSION" -lt $(version_code 2.7.63) ] &&
+		skip "DNE CoS not supported"
 
 	local client2=${CLIENT2:-$(hostname)}
 
@@ -1144,7 +1194,7 @@ cleanup_34() {
 	do_nodes $(comma_list $(osts_nodes)) \
 		"lctl set_param -n fail_loc=0 2>/dev/null || true"
 	for i in $(seq $OSTCOUNT); do
-		wait_osc_import_state client ost$i FULL
+		wait_osc_import_ready client ost$i
 	done
 }
 
@@ -1250,7 +1300,7 @@ test_35() { # bug 17645
 	for g in $gen; do
 	    if ! test "$g" -eq "${generation[count]}"; then
 		list=$(lctl list_param mdc.$FSNAME-MDT*-mdc-*.import)
-		local c = 0
+		local c=0
 		for imp in $list; do
 			if [ $c = $count ]; then
 				break
@@ -1439,13 +1489,32 @@ test_39d() { # LU-7310
 }
 run_test 39d "sync write should update mtime"
 
+pdo_sched() {
+	# how long 40-47 take with specific delay
+	# sleep 0.1 # 78s
+	# sleep 0.2 # 103s
+	# sleep 0.3 # 124s
+	sleep 0.5 # 164s
+}
+
+# for pdo testing, we must cancel MDT-MDT locks as well as client locks to
+# avoid unexpected delays due to previous tests
+pdo_lru_clear() {
+	cancel_lru_locks mdc
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL set_param -n ldlm.namespaces.*mdt*.lru_size=clear
+	do_nodes $(comma_list $(mdts_nodes)) \
+		$LCTL get_param ldlm.namespaces.*mdt*.lock_unused_count \
+			ldlm.namespaces.*mdt*.lock_count | grep -v '=0'
+}
+
 # check that pid exists hence second operation wasn't blocked by first one
 # if it is so then there is no conflict, return 0
 # else second operation is conflicting with first one, return 1
 check_pdo_conflict() {
 	local pid=$1
 	local conflict=0
-	sleep 1 # to ensure OP1 is finished on client if OP2 is blocked by OP1
+	pdo_sched # to ensure OP1 is finished on client if OP2 is blocked by OP1
 	if [[ `ps --pid $pid | wc -l` == 1 ]]; then
 		conflict=1
 		echo "Conflict"
@@ -1459,12 +1528,12 @@ check_pdo_conflict() {
 # test 40: check non-blocking operations
 test_40a() {
 	remote_mds_nodsh && skip "remote MDS with nodsh" && return
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	touch $DIR2
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
+	PID1=$!; pdo_sched
 	touch $DIR2/$tfile-2
 	check_pdo_conflict $PID1 || error "create is blocked"
 	mkdir $DIR2/$tfile-3
@@ -1481,6 +1550,7 @@ test_40a() {
 
 	#  all operations above shouldn't wait the first one
 	check_pdo_conflict $PID1 || error "parallel operation is blocked"
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	wait $PID1
 	rm -rf $DIR/$tfile*
 	return 0
@@ -1489,11 +1559,11 @@ run_test 40a "pdirops: create vs others =============="
 
 test_40b() {
 	remote_mds_nodsh && skip "remote MDS with nodsh" && return
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	touch $DIR1/$tfile &
-	PID1=$!
-	sleep 1
+	PID1=$!; pdo_sched
 	# open|create
 	touch $DIR2/$tfile-2
 	check_pdo_conflict $PID1 || error "create is blocked"
@@ -1511,6 +1581,7 @@ test_40b() {
 	# all operations above shouldn't wait the first one
 
         check_pdo_conflict $PID1 || error "parallel operation is blocked"
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	wait $PID1
 	rm -rf $DIR/$tfile*
 	return 0
@@ -1519,12 +1590,12 @@ run_test 40b "pdirops: open|create and others =============="
 
 test_40c() {
 	remote_mds_nodsh && skip "remote MDS with nodsh" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	link $DIR1/$tfile $DIR1/$tfile-0 &
-	PID1=$!
-	sleep 1
+	PID1=$!; pdo_sched
 	# open|create
 	touch $DIR2/$tfile-2
 	check_pdo_conflict $PID1 || error "create is blocked"
@@ -1542,6 +1613,7 @@ test_40c() {
 
         # all operations above shouldn't wait the first one
 	check_pdo_conflict $PID1 || error "parallel operation is blocked"
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	wait $PID1
 	rm -rf $DIR/$tfile*
 	return 0
@@ -1550,12 +1622,12 @@ run_test 40c "pdirops: link and others =============="
 
 test_40d() {
 	remote_mds_nodsh && skip "remote MDS with nodsh" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
+	PID1=$!; pdo_sched
 	# open|create
 	touch $DIR2/$tfile-2
 	check_pdo_conflict $PID1 || error "create is blocked"
@@ -1573,6 +1645,7 @@ test_40d() {
 
 	# all operations above shouldn't wait the first one
 	check_pdo_conflict $PID1 || error "parallel operation is blocked"
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	wait $PID1
 	return 0
 }
@@ -1580,12 +1653,12 @@ run_test 40d "pdirops: unlink and others =============="
 
 test_40e() {
 	remote_mds_nodsh && skip "remote MDS with nodsh" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mv $DIR1/$tfile $DIR1/$tfile-0 &
-	PID1=$!
-	sleep 1
+	PID1=$!; pdo_sched
 	# open|create
 	touch $DIR2/$tfile-2
 	check_pdo_conflict $PID1 || error "create is blocked"
@@ -1601,6 +1674,7 @@ test_40e() {
 
        # all operations above shouldn't wait the first one
 	check_pdo_conflict $PID1 || error "parallel operation is blocked"
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	wait $PID1
 	rm -rf $DIR/$tfile*
 	return 0
@@ -1609,106 +1683,130 @@ run_test 40e "pdirops: rename and others =============="
 
 # test 41: create blocking operations
 test_41a() {
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile && error "mkdir must fail"
+	PID1=$! ; pdo_sched
+	mkdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; echo "mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "mkdir must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41a "pdirops: create vs mkdir =============="
 
 test_41b() {
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c && error "create must fail"
+	PID1=$! ; pdo_sched
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "create isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "create must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41b "pdirops: create vs create =============="
 
 test_41c() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile-2 $DIR2/$tfile && error "link must fail"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "link must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41c "pdirops: create vs link =============="
 
 test_41d() {
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	rm $DIR2/$tfile || error "unlink must succeed"
+	PID1=$! ; pdo_sched
+	rm $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "unlink must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41d "pdirops: create vs unlink =============="
 
 test_41e() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile-2 $DIR2/$tfile || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41e "pdirops: create and rename (tgt) =============="
 
 test_41f() {
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-2 || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-2 &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41f "pdirops: create and rename (src) =============="
 
 test_41g() {
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null || error "stat must succeed"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "stat must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 41g "pdirops: create vs getattr =============="
 
 test_41h() {
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$MULTIOP $DIR1/$tfile oO_CREAT:O_RDWR:c &
-	PID1=$!
-	sleep 1
-	ls -lia $DIR2/ > /dev/null
+	PID1=$! ; pdo_sched
+	ls -lia $DIR2/ > /dev/null &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "readdir isn't blocked"; }
+	wait $PID2
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -1716,106 +1814,130 @@ run_test 41h "pdirops: create vs readdir =============="
 
 # test 42: unlink and blocking operations
 test_42a() {
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile && error "mkdir must fail"
+	PID1=$! ; pdo_sched
+	mkdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "mkdir must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42a "pdirops: mkdir vs mkdir =============="
 
 test_42b() {
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c && error "create must fail"
+	PID1=$! ; pdo_sched
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "create isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "create must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42b "pdirops: mkdir vs create =============="
 
 test_42c() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile-2 $DIR2/$tfile && error "link must fail"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "link must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42c "pdirops: mkdir vs link =============="
 
 test_42d() {
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	rmdir $DIR2/$tfile || error "unlink must succeed"
+	PID1=$! ; pdo_sched
+	rmdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "unlink must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42d "pdirops: mkdir vs unlink =============="
 
 test_42e() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv -T $DIR2/$tfile-2 $DIR2/$tfile && error "rename must fail"
+	PID1=$! ; pdo_sched
+	mv -T $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "rename must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42e "pdirops: mkdir and rename (tgt) =============="
 
 test_42f() {
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-2 || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-2 &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42f "pdirops: mkdir and rename (src) =============="
 
 test_42g() {
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null || error "stat must succeed"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "stat must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 42g "pdirops: mkdir vs getattr =============="
 
 test_42h() {
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mkdir $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	ls -lia $DIR2/ > /dev/null
+	PID1=$! ; pdo_sched
+	ls -lia $DIR2/ > /dev/null &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "readdir isn't blocked"; }
+	wait $PID2
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -1823,114 +1945,138 @@ run_test 42h "pdirops: mkdir vs readdir =============="
 
 # test 43: unlink and blocking operations
 test_43a() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile || error "mkdir must succeed"
+	PID1=$! ; pdo_sched
+	mkdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "mkdir must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43a "pdirops: unlink vs mkdir =============="
 
 test_43b() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c || error "create must succeed"
+	PID1=$! ; pdo_sched
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "create isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "create must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43b "pdirops: unlink vs create =============="
 
 test_43c() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile-2 $DIR2/$tfile || error "link must succeed"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "link must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43c "pdirops: unlink vs link =============="
 
 test_43d() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	rm $DIR2/$tfile && error "unlink must fail"
+	PID1=$! ; pdo_sched
+	rm $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "unlink must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43d "pdirops: unlink vs unlink =============="
 
 test_43e() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv -u $DIR2/$tfile-2 $DIR2/$tfile || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv -u $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43e "pdirops: unlink and rename (tgt) =============="
 
 test_43f() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-2 && error "rename must fail"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-2 &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "rename must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43f "pdirops: unlink and rename (src) =============="
 
 test_43g() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null && error "stat must fail"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "stat must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 43g "pdirops: unlink vs getattr =============="
 
 test_43h() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	ls -lia $DIR2/ > /dev/null
+	PID1=$! ; pdo_sched
+	ls -lia $DIR2/ > /dev/null &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "readdir isn't blocked"; }
+	wait $PID2
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -1938,15 +2084,18 @@ run_test 43h "pdirops: unlink vs readdir =============="
 
 test_43i() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	rm $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$LFS mkdir -i 1 $DIR2/$tfile || error "remote mkdir must succeed"
+	PID1=$! ; pdo_sched
+	$LFS mkdir -i 1 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 &&
 		{ wait $PID1; error "remote mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "remote mkdir must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -1954,116 +2103,141 @@ run_test 43i "pdirops: unlink vs remote mkdir"
 
 # test 44: rename tgt and blocking operations
 test_44a() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2   0x146
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile && error "mkdir must fail"
-	check_pdo_conflict $PID1 && { wait $PID1; error "mkdir isn't blocked"; }
+	PID1=$! ; pdo_sched
+	mkdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
+	check_pdo_conflict $PID1 && { wait $PID1; date;error "mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "mkdir must fail"
+	date
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44a "pdirops: rename tgt vs mkdir =============="
 
 test_44b() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c && error "create must fail"
+	PID1=$! ; pdo_sched
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "create isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "create must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44b "pdirops: rename tgt vs create =============="
 
 test_44c() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 	touch $DIR1/$tfile-3
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile-3 $DIR2/$tfile && error "link must fail"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile-3 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "link must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44c "pdirops: rename tgt vs link =============="
 
 test_44d() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	rm $DIR2/$tfile || error "unlink must succeed"
+	PID1=$! ; pdo_sched
+	rm $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "unlink must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44d "pdirops: rename tgt vs unlink =============="
 
 test_44e() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 	touch $DIR1/$tfile-2
 	touch $DIR1/$tfile-3
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile-3 $DIR2/$tfile || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile-3 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44e "pdirops: rename tgt and rename (tgt) =============="
 
 test_44f() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 	touch $DIR1/$tfile-3
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-3 || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-3 &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44f "pdirops: rename tgt and rename (src) =============="
 
 test_44g() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null || error "stat must succeed"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "stat must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 44g "pdirops: rename tgt vs getattr =============="
 
 test_44h() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2    0x146
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	ls -lia $DIR2/ > /dev/null
+	PID1=$! ; pdo_sched
+	ls -lia $DIR2/ > /dev/null &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "readdir isn't blocked"; }
+	wait $PID2
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2072,15 +2246,18 @@ run_test 44h "pdirops: rename tgt vs readdir =============="
 # test 44: rename tgt and blocking operations
 test_44i() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK2   0x146
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000146
 	mv $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$LFS mkdir -i 1 $DIR2/$tfile && error "remote mkdir must fail"
+	PID1=$! ; pdo_sched
+	$LFS mkdir -i 1 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1;
 				error "remote mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "remote mkdir must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2088,114 +2265,137 @@ run_test 44i "pdirops: rename tgt vs remote mkdir"
 
 # test 45: rename src and blocking operations
 test_45a() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile || error "mkdir must succeed"
+	PID1=$! ; pdo_sched
+	mkdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "mkdir must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45a "pdirops: rename src vs mkdir =============="
 
 test_45b() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c || error "create must succeed"
+	PID1=$! ; pdo_sched
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "create isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "create must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45b "pdirops: rename src vs create =============="
 
 test_45c() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 	touch $DIR1/$tfile-3
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile-3 $DIR2/$tfile || error "link must succeed"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile-3 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "link must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45c "pdirops: rename src vs link =============="
 
 test_45d() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	rm $DIR2/$tfile && error "unlink must fail"
+	PID1=$! ; pdo_sched
+	rm $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "unlink must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45d "pdirops: rename src vs unlink =============="
 
 test_45e() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 	touch $DIR1/$tfile-3
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile-3 $DIR2/$tfile || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile-3 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45e "pdirops: rename src and rename (tgt) =============="
 
 test_45f() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-3 && error "rename must fail"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-3 &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "rename must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45f "pdirops: rename src and rename (src) =============="
 
 test_45g() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null && error "stat must fail"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "stat must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 45g "pdirops: rename src vs getattr =============="
 
 test_45h() {
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	ls -lia $DIR2/ > /dev/null
+	PID1=$! ; pdo_sched
+	ls -lia $DIR2/ > /dev/null &
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "readdir isn't blocked"; }
+	wait $PID2
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2203,15 +2403,18 @@ run_test 45h "pdirops: unlink vs readdir =============="
 
 test_45i() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	mv $DIR1/$tfile $DIR1/$tfile-2 &
-	PID1=$!
-	sleep 1
-	$LFS mkdir -i 1 $DIR2/$tfile || error "create remote dir must succeed"
+	PID1=$! ; pdo_sched
+	$LFS mkdir -i 1 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1;
 				error "create remote dir isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "create remote dir must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2219,115 +2422,138 @@ run_test 45i "pdirops: rename src vs remote mkdir"
 
 # test 46: link and blocking operations
 test_46a() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile && error "mkdir must fail"
+	PID1=$! ; pdo_sched
+	mkdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "mkdir must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46a "pdirops: link vs mkdir =============="
 
 test_46b() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c && error "create must fail"
+	PID1=$! ; pdo_sched
+	$MULTIOP $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "create isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "create must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46b "pdirops: link vs create =============="
 
 test_46c() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile $DIR2/$tfile && error "link must fail"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "link must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46c "pdirops: link vs link =============="
 
 test_46d() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	rm $DIR2/$tfile || error "unlink must succeed"
+	PID1=$! ; pdo_sched
+	rm $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "unlink must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46d "pdirops: link vs unlink =============="
 
 test_46e() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 	touch $DIR1/$tfile-3
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile-3 $DIR2/$tfile || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile-3 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46e "pdirops: link and rename (tgt) =============="
 
 test_46f() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 	touch $DIR1/$tfile-3
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-3 || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-3 &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46f "pdirops: link and rename (src) =============="
 
 test_46g() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null || error "stat must succeed"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "stat must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
 run_test 46g "pdirops: link vs getattr =============="
 
 test_46h() {
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	ls -lia $DIR2/ > /dev/null
-	check_pdo_conflict $PID1 && { wait $PID1;
-			error "readdir isn't blocked"; }
+	PID1=$! ; pdo_sched
+	ls -lia $DIR2/ > /dev/null &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
+	check_pdo_conflict $PID1 && { wait $PID1; error "readdir isn't blocked"; }
+	wait $PID2
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2335,15 +2561,18 @@ run_test 46h "pdirops: link vs readdir =============="
 
 test_46i() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	link $DIR1/$tfile-2 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	$LFS mkdir -i 1 $DIR2/$tfile && error "remote mkdir must fail"
+	PID1=$! ; pdo_sched
+	$LFS mkdir -i 1 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1;
 				error "remote mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "remote mkdir must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2353,12 +2582,15 @@ run_test 46i "pdirops: link vs remote mkdir"
 test_47a() {
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mkdir $DIR2/$tfile && error "mkdir must fail"
+	PID1=$! ; pdo_sched
+	mkdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "mkdir isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "mkdir must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2367,13 +2599,17 @@ run_test 47a "pdirops: remote mkdir vs mkdir"
 test_47b() {
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	multiop $DIR2/$tfile oO_CREAT:O_EXCL:c && error "create must fail"
+	PID1=$! ; pdo_sched
+	sleep 1 # please do not remove this sleep, see LU-10754
+	multiop $DIR2/$tfile oO_CREAT:O_EXCL:c &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1;
 					error "create isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "create must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2381,14 +2617,17 @@ run_test 47b "pdirops: remote mkdir vs create"
 
 test_47c() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	link $DIR2/$tfile-2 $DIR2/$tfile && error "link must fail"
+	PID1=$! ; pdo_sched
+	link $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1; error "link isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "link must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2396,14 +2635,17 @@ run_test 47c "pdirops: remote mkdir vs link"
 
 test_47d() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	rmdir $DIR2/$tfile || error "unlink must succeed"
+	PID1=$! ; pdo_sched
+	rmdir $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1;
 					error "unlink isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rmdir must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2411,15 +2653,18 @@ run_test 47d "pdirops: remote mkdir vs unlink"
 
 test_47e() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 	touch $DIR1/$tfile-2
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv -T $DIR2/$tfile-2 $DIR2/$tfile && error "rename must fail"
+	PID1=$! ; pdo_sched
+	mv -T $DIR2/$tfile-2 $DIR2/$tfile &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1;
 					error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -ne 0 ] || error "rename must fail"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2427,14 +2672,17 @@ run_test 47e "pdirops: remote mkdir and rename (tgt)"
 
 test_47f() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	mv $DIR2/$tfile $DIR2/$tfile-2 || error "rename must succeed"
+	PID1=$! ; pdo_sched
+	mv $DIR2/$tfile $DIR2/$tfile-2 &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1;
 					error "rename isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "rename must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2442,14 +2690,19 @@ run_test 47f "pdirops: remote mkdir and rename (src)"
 
 test_47g() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
+	sync
+	sync_all_data
+	pdo_lru_clear
 #define OBD_FAIL_ONCE|OBD_FAIL_MDS_PDO_LOCK    0x145
 	do_facet $SINGLEMDS lctl set_param fail_loc=0x80000145
 	$LFS mkdir -i 1 $DIR1/$tfile &
-	PID1=$!
-	sleep 1
-	stat $DIR2/$tfile > /dev/null || error "stat must succeed"
+	PID1=$! ; pdo_sched
+	stat $DIR2/$tfile > /dev/null &
+	PID2=$! ; pdo_sched
+	do_facet $SINGLEMDS lctl set_param fail_loc=0
 	check_pdo_conflict $PID1 && { wait $PID1;
 					error "getattr isn't blocked"; }
+	wait $PID2 ; [ $? -eq 0 ] || error "stat must succeed"
 	rm -rf $DIR/$tfile*
 	return 0
 }
@@ -2502,8 +2755,8 @@ test_51a() {
 run_test 51a "layout lock: refresh layout should work"
 
 test_51b() {
-	[[ $(lustre_version_code $SINGLEMDS) -ge $(version_code 2.3.59) ]] ||
-		{ skip "Need MDS version at least 2.3.59"; return 0; }
+	[[ "$MDS1_VERSION" -ge $(version_code 2.3.59) ]] ||
+		skip "Need MDS version at least 2.3.59"
 
 	local tmpfile=`mktemp`
 
@@ -2744,9 +2997,8 @@ test_55d()
 run_test 55d "rename file vs link"
 
 test_60() {
-	local MDSVER=$(lustre_build_version $SINGLEMDS)
-	[ $(version_code $MDSVER) -lt $(version_code 2.3.0) ] &&
-		skip "MDS version $MDSVER must be >= 2.3.0" && return 0
+	[ $MDS1_VERSION -lt $(version_code 2.3.0) ] &&
+		skip "MDS version must be >= 2.3.0"
 
 	# Create a file
 	test_mkdir $DIR1/$tdir
@@ -2832,22 +3084,19 @@ test_70b() { # LU-2781
 run_test 70b "remove files after calling rm_entry"
 
 test_71a() {
-	local server_version=$(lustre_version_code $SINGLEMDS)
-
-	[[ $server_version -lt $(version_code 2.1.6) ]] &&
-		skip "Need MDS version at least 2.1.6" && return
+	[[ "$MDS1_VERSION" -lt $(version_code 2.1.6) ]] &&
+		skip "Need MDS version at least 2.1.6"
 
 	# Patch not applied to 2.2 and 2.3 branches
-	[[ $server_version -ge $(version_code 2.2.0) ]] &&
-	[[ $server_version -lt $(version_code 2.4.0) ]] &&
-		skip "Need MDS version earlier than 2.2.0 or at least 2.4.0" &&
-			return
+	[[ "$MDS1_VERSION" -ge $(version_code 2.2.0) ]] &&
+	[[ "$MDS1_VERSION" -lt $(version_code 2.4.0) ]] &&
+		skip "Need MDS version earlier than 2.2.0 or at least 2.4.0"
 
 	checkfiemap --test ||
-		{ skip "checkfiemap not runnable: $?" && return; }
+		skip "checkfiemap not runnable: $?"
 	# write data this way: hole - data - hole - data
 	dd if=/dev/urandom of=$DIR1/$tfile bs=40K seek=1 count=1
-	[ "$(facet_fstype ost$(($($GETSTRIPE -i $DIR1/$tfile) + 1)))" = \
+	[ "$(facet_fstype ost$(($($LFS getstripe -i $DIR1/$tfile) + 1)))" = \
 		"zfs" ] &&
 		skip "ORI-366/LU-1941: FIEMAP unimplemented on ZFS" && return 0
 	dd if=/dev/urandom of=$DIR1/$tfile bs=40K seek=3 count=1
@@ -2876,26 +3125,23 @@ test_71a() {
 run_test 71a "correct file map just after write operation is finished"
 
 test_71b() {
-	local server_version=$(lustre_version_code $SINGLEMDS)
-
-	[[ $server_version -lt $(version_code 2.1.6) ]] &&
-		skip "Need MDS version at least 2.1.6" && return
+	[[ "$MDS1_VERSION" -lt $(version_code 2.1.6) ]] &&
+		skip "Need MDS version at least 2.1.6"
 
 	# Patch not applied to 2.2 and 2.3 branches
-	[[ $server_version -ge $(version_code 2.2.0) ]] &&
-	[[ $server_version -lt $(version_code 2.4.0) ]] &&
-		skip "Need MDS version earlier than 2.2.0 or at least 2.4.0" &&
-			return
-	[[ $OSTCOUNT -ge 2 ]] || { skip "needs >= 2 OSTs"; return; }
+	[[ "$MDS1_VERSION" -ge $(version_code 2.2.0) ]] &&
+	[[ "$MDS1_VERSION" -lt $(version_code 2.4.0) ]] &&
+		skip "Need MDS version earlier than 2.2.0 or at least 2.4.0"
+	[[ $OSTCOUNT -ge 2 ]] || skip "needs >= 2 OSTs"
 
 	checkfiemap --test ||
-		{ skip "error $?: checkfiemap failed" && return; }
+		skip "error $?: checkfiemap failed"
 
 	mkdir -p $DIR1/$tdir
 
 	$LFS setstripe -c -1 $DIR1/$tdir || error "setstripe failed"
 	dd if=/dev/urandom of=$DIR1/$tdir/$tfile bs=40K count=1
-	[ "$(facet_fstype ost$(($($GETSTRIPE -i $DIR1/$tdir/$tfile) + 1)))" = \
+	[ "$(facet_fstype ost$(($($LFS getstripe -i $DIR1/$tdir/$tfile) + 1)))" = \
 		"zfs" ] &&
 		skip "ORI-366/LU-1941: FIEMAP unimplemented on ZFS" && return 0
 	checkfiemap $DIR1/$tdir/$tfile 40960 || error "checkfiemap failed"
@@ -2963,8 +3209,8 @@ test_73() {
 run_test 73 "getxattr should not cause xattr lock cancellation"
 
 test_74() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.4.93) ] &&
-		skip "Need MDS version at least 2.4.93" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.4.93) ] &&
+		skip "Need MDS version at least 2.4.93"
 
 	dd if=/dev/zero of=$DIR1/$tfile-1 bs=1K count=1
 	dd if=/dev/zero of=$DIR1/$tfile-2 bs=1K count=1
@@ -2995,10 +3241,10 @@ test_75() {
 run_test 75 "osc: upcall after unuse lock==================="
 
 test_76() { #LU-946
-	[[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.5.53) ]] &&
-		skip "Need MDS version at least 2.5.53" && return
+	[[ "$MDS1_VERSION" -lt $(version_code 2.5.53) ]] &&
+		skip "Need MDS version at least 2.5.53"
 
-	remote_mds_nodsh && skip "remote MDS with nodsh" && return
+	remote_mds_nodsh && skip "remote MDS with nodsh"
 	local fcount=$((MDSCOUNT * 256))
 	declare -a fd_list
 	declare -a fid_list
@@ -3088,31 +3334,47 @@ nrs_write_read() {
 	chmod 777 $dir
 
 	do_nodes $CLIENTS $myRUNAS \
-		dd if=/dev/zero of="$dir/nrs_r_$HOSTNAME" bs=1M count=$n ||
+		dd if=/dev/zero of="$dir/nrs_r_\$HOSTNAME" bs=1M count=$n ||
 		error "dd at 0 on client failed (1)"
 
-	for ((i = 0; i < $n; i++)); do
-		do_nodes $CLIENTS $myRUNAS dd if=/dev/zero \
-			of="$dir/nrs_w_$HOSTNAME" bs=1M seek=$i count=1 ||
-			 error "dd at ${i}MB on client failed (2)" &
-		local pids_w[$i]=$!
-	done
+	do_nodes $CLIENTS $myRUNAS \
+		"declare -a pids_w;
+		for ((i = 0; i < $n; i++)); do
+			dd if=/dev/zero of=$dir/nrs_w_\$HOSTNAME bs=1M \
+seek=\\\$i count=1 conv=notrunc &
+			pids_w[\\\$i]=\\\$!;
+		done;
+		rc_w=0;
+		for ((i = 0; i < $n; i++)); do
+			wait \\\${pids_w[\\\$i]};
+			newrc=\\\$?;
+			[ \\\$newrc -gt \\\$rc_w ] && rc_w=\\\$newrc;
+		done;
+		exit \\\$rc_w" &
+	local pid_w=$!
 	do_nodes $CLIENTS sync;
 	cancel_lru_locks osc
 
-	for ((i = 0; i < $n; i++)); do
-		do_nodes $CLIENTS $myRUNAS dd if="$dir/nrs_w_$HOSTNAME" \
-			of=/dev/zero bs=1M seek=$i count=1 > /dev/null ||
-			error "dd at ${i}MB on client failed (3)" &
-		local pids_r[$i]=$!
-	done
+	do_nodes $CLIENTS $myRUNAS \
+		"declare -a pids_r;
+		for ((i = 0; i < $n; i++)); do
+			dd if=$dir/nrs_r_\$HOSTNAME bs=1M of=/dev/null \
+seek=\\\$i count=1 &
+			pids_r[\\\$i]=\\\$!;
+		done;
+		rc_r=0;
+		for ((i = 0; i < $n; i++)); do
+			wait \\\${pids_r[\\\$i]};
+			newrc=\\\$?;
+			[ \\\$newrc -gt \\\$rc_r ] && rc_r=\\\$newrc;
+		done;
+		exit \\\$rc_r" &
+	local pid_r=$!
 	cancel_lru_locks osc
 
-	for ((i = 0; i < $n; i++)); do
-		wait ${pids_w[$i]}
-		wait ${pids_r[$i]}
-	done
-	rm -rf $dir || error "rm -rf $dir failed"
+	wait $pid_w || error "dd (write) failed (2)"
+	wait $pid_r || error "dd (read) failed (3)"
+	rm -rvf $dir || error "rm -rf $dir failed"
 }
 
 test_77a() { #LU-3266
@@ -3289,7 +3551,7 @@ test_77e() {
 
 	local idis
 	local rateis
-	if [ $(lustre_version_code ost1) -ge $(version_code 2.8.54) ]; then
+	if [ "$OST1_VERSION" -ge $(version_code 2.8.54) ]; then
 		idis="nid="
 		rateis="rate="
 	fi
@@ -3339,14 +3601,13 @@ test_77f() {
 	[[ $rc -eq 3 ]] && skip "jobid_var not found" && return
 	[[ $rc -ne 0 ]] && error "failed to get param jobid_var"
 	if [ $saved_jobid_var != procname_uid ]; then
-		set_conf_param_and_check client			\
-			"$LCTL get_param -n jobid_var"		\
-			"$FSNAME.sys.jobid_var" procname_uid
+		set_persistent_param_and_check client \
+			"jobid_var" "$FSNAME.sys.jobid_var" procname_uid
 	fi
 
 	local idis
 	local rateis
-	if [ $(lustre_version_code ost1) -ge $(version_code 2.8.54) ]; then
+	if [ "$OST1_VERSION" -ge $(version_code 2.8.54) ]; then
 		idis="jobid="
 		rateis="rate="
 	fi
@@ -3378,9 +3639,8 @@ test_77f() {
 	local current_jobid_var=$($LCTL get_param -n jobid_var)
 	[[ $? -ne 0 ]] && error "failed to get param jobid_var"
 	if [ $saved_jobid_var != $current_jobid_var ]; then
-		set_conf_param_and_check client			\
-			"$LCTL get_param -n jobid_var"		\
-			"$FSNAME.sys.jobid_var" $saved_jobid_var
+		set_persistent_param_and_check client \
+			"jobid_var" "$FSNAME.sys.jobid_var" $saved_jobid_var
 	fi
 	return 0
 }
@@ -3402,7 +3662,7 @@ test_77g() {
 
 	local idis
 	local rateis
-	if [ $(lustre_version_code ost1) -ge $(version_code 2.8.54) ]; then
+	if [ "$OST1_VERSION" -ge $(version_code 2.8.54) ]; then
 		idis="jobid="
 		rateis="rate="
 	fi
@@ -3419,8 +3679,8 @@ test_77g() {
 run_test 77g "Change TBF type directly"
 
 test_77h() {
-	[ $(lustre_version_code ost1) -ge $(version_code 2.8.55) ] ||
-		{ skip "Need OST version at least 2.8.55"; return 0; }
+	[ "$OST1_VERSION" -ge $(version_code 2.8.55) ] ||
+		skip "Need OST version at least 2.8.55"
 
 	local old_policy=$(do_facet ost1 \
 		lctl get_param ost.OSS.ost_io.nrs_policies)
@@ -3474,8 +3734,8 @@ tbf_rule_check()
 }
 
 test_77i() {
-	[ $(lustre_version_code ost1) -ge $(version_code 2.8.55) ] ||
-		{ skip "Need OST version at least 2.8.55"; return 0; }
+	[ "$OST1_VERSION" -ge $(version_code 2.8.55) ] ||
+		skip "Need OST version at least 2.8.55"
 
 	for i in $(seq 1 $OSTCOUNT)
 	do
@@ -3529,11 +3789,10 @@ run_test 77i "Change rank of TBF rule"
 test_77j() {
 	local idis
 	local rateis
-	local ost_version=$(lustre_version_code ost1)
 
-	[ $ost_version -ge $(version_code 2.9.53) ] ||
-		{ skip "Need OST version at least 2.9.53"; return 0; }
-	if [ $ost_version -ge $(version_code 2.8.60) ]; then
+	[ "$OST1_VERSION" -ge $(version_code 2.9.53) ] ||
+		skip "Need OST version at least 2.9.53"
+	if [ "$OST1_VERSION" -ge $(version_code 2.8.60) ]; then
 		idis="opcode="
 		rateis="rate="
 	fi
@@ -3585,10 +3844,10 @@ test_id() {
 }
 
 test_77ja(){
-	if [ $(lustre_version_code ost1) -lt $(version_code 2.10.58) ]; then
-		skip "need ost version at least 2.10.58"
-		return 0
+	if [ "$OST1_VERSION" -lt $(version_code 2.11.50) ]; then
+		skip "Need OST version at least 2.11.50"
 	fi
+
 	test_id "u" "500" "5" "-u 500"
 	test_id "g" "500" "5" "-u 500 -g 500"
 }
@@ -3612,8 +3871,8 @@ cleanup_77k()
 }
 
 test_77k() {
-	[[ $(lustre_version_code ost1) -ge $(version_code 2.9.53) ]] ||
-		{ skip "Need OST version at least 2.9.53"; return 0; }
+	[[ "$OST1_VERSION" -ge $(version_code 2.9.53) ]] ||
+		skip "Need OST version at least 2.9.53"
 
 	do_nodes $(comma_list $(osts_nodes)) \
 		lctl set_param ost.OSS.ost_io.nrs_policies="tbf" \
@@ -3655,8 +3914,8 @@ test_77k() {
 
 	trap "cleanup_77k \"ext_a ext_b\" \"fifo\"" EXIT
 
-	[[ $(lustre_version_code ost1) -ge $(version_code 2.10.58) ]] ||
-		{ skip "Need OST version at least 2.10.58"; return 0; }
+	[[ "$OST1_VERSION" -ge $(version_code 2.10.58) ]] ||
+		skip "Need OST version at least 2.10.58"
 
 	do_nodes $(comma_list $(osts_nodes)) \
 		lctl set_param ost.OSS.ost_io.nrs_tbf_rule="stop\ ext_a" \
@@ -3686,8 +3945,8 @@ test_77k() {
 run_test 77k "check TBF policy with NID/JobID/OPCode expression"
 
 test_77l() {
-	[[ $(lustre_version_code ost1) -ge $(version_code 2.10.56) ]] ||
-		{ skip "Need OST version at least 2.10.56"; return 0; }
+	[[ "$OST1_VERSION" -ge $(version_code 2.10.56) ]] ||
+		skip "Need OST version at least 2.10.56"
 
 	do_facet ost1 lctl set_param ost.OSS.ost_io.nrs_policies="tbf\ nid"
 	do_facet ost1 lctl set_param ost.OSS.ost_io.nrs_policies="tbf"
@@ -3706,9 +3965,8 @@ test_77l() {
 run_test 77l "check the output of NRS policies for generic TBF"
 
 test_77m() {
-	if [ $(lustre_version_code ost1) -lt $(version_code 2.9.54) ]; then
+	if [ "$OST1_VERSION" -lt $(version_code 2.9.54) ]; then
 		skip "Need OST version at least 2.9.54"
-		return 0
 	fi
 
 	local dir=$DIR/$tdir
@@ -3758,17 +4016,15 @@ test_77m() {
 run_test 77m "check NRS Delay slows write RPC processing"
 
 test_77n() { #LU-10802
-	if [ $(lustre_version_code ost1) -lt $(version_code 2.10.58) ]; then
+	if [ "$OST1_VERSION" -lt $(version_code 2.10.58) ]; then
 		skip "Need OST version at least 2.10.58"
-		return 0
 	fi
 
 	# Configure jobid_var
 	local saved_jobid_var=$($LCTL get_param -n jobid_var)
 	if [ $saved_jobid_var != procname_uid ]; then
-		set_conf_param_and_check client			\
-			"$LCTL get_param -n jobid_var"		\
-			"$FSNAME.sys.jobid_var" procname_uid
+		set_persistent_param_and_check client \
+			"jobid_var" "$FSNAME.sys.jobid_var" procname_uid
 	fi
 
 	do_nodes $(comma_list $(osts_nodes)) \
@@ -3794,9 +4050,8 @@ test_77n() { #LU-10802
 
 	local current_jobid_var=$($LCTL get_param -n jobid_var)
 	if [ $saved_jobid_var != $current_jobid_var ]; then
-		set_conf_param_and_check client			\
-			"$LCTL get_param -n jobid_var"		\
-			"$FSNAME.sys.jobid_var" $saved_jobid_var
+		set_persistent_param_and_check client \
+			"jobid_var" "$FSNAME.sys.jobid_var" $saved_jobid_var
 	fi
 }
 run_test 77n "check wildcard support for TBF JobID NRS policy"
@@ -4016,7 +4271,7 @@ test_80b() {
 }
 run_test 80b "Accessing directory during migration"
 
-test_81() {
+test_81a() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
 
 	rm -rf $DIR1/$tdir
@@ -4042,11 +4297,39 @@ test_81() {
 
 	return 0
 }
-run_test 81 "rename and stat under striped directory"
+run_test 81a "rename and stat under striped directory"
+
+test_81b() {
+	[ $MDSCOUNT -lt 2 ] &&
+		skip "We need at least 2 MDTs for this test"
+
+	local total
+	local setattr_pid
+
+	total=1000
+
+	$LFS mkdir -c $MDSCOUNT $DIR1/$tdir || error "$LFS mkdir"
+	createmany -o $DIR1/$tdir/$tfile. $total || error "createmany"
+
+	(
+		while true; do
+			touch $DIR1/$tdir
+		done
+	) &
+	setattr_pid=$!
+
+	for i in $(seq $total); do
+		mrename $DIR2/$tdir/$tfile.$i $DIR2/$tdir/$tfile-new.$i \
+			> /dev/null
+	done
+
+	kill -9 $setattr_pid
+}
+run_test 81b "rename under striped directory doesn't deadlock"
 
 test_82() {
-	[[ $(lustre_version_code $SINGLEMDS) -gt $(version_code 2.6.91) ]] ||
-		{ skip "Need MDS version at least 2.6.92"; return 0; }
+	[[ "$MDS1_VERSION" -gt $(version_code 2.6.91) ]] ||
+		skip "Need MDS version at least 2.6.92"
 
 	# Client 1 creates a file.
 	multiop_bg_pause $DIR1/$tfile O_ac || error "multiop_bg_pause 1"
@@ -4101,6 +4384,31 @@ test_83() {
 }
 run_test 83 "access striped directory while it is being created/unlinked"
 
+test_84() {
+	[ $MDS1_VERSION -lt $(version_code 2.12.55) ] &&
+		skip "lustre < 2.12.55 does not contain LU-12485 fix"
+
+	local mtime
+
+	$MULTIOP $DIR/$tfile oO_RDWR:O_CREAT:O_LOV_DELAY_CREATE:c ||
+		error "create $tfile failed"
+	mtime=$(stat -c%Y $DIR/$tfile)
+	mtime=$((mtime + 200))
+
+	#define OBD_FAIL_OBD_0NLINK_RACE  0x60b
+	do_facet mds1 $LCTL set_param fail_loc=0x8000060b
+
+	touch -c -m $mtime $DIR/$tfile &
+	setattr_pid=$!
+	# sleep a while to let 'touch' run first
+	sleep 5
+	rm -f $DIR2/$tfile || error "unlink $tfile failed"
+
+	# touch may fail
+	wait $setattr_pid || true
+}
+run_test 84 "0-nlink race in lu_object_find()"
+
 test_90() {
 	[ $MDSCOUNT -lt 2 ] && skip "needs >= 2 MDTs" && return
 	local pid1
@@ -4205,29 +4513,29 @@ test_93() {
 
 	mkdir -p $DIR1/$tfile-1/
 	mkdir -p $DIR2/$tfile-2/
-	local old_rr=$(do_facet $SINGLEMDS lctl get_param -n \
-		'lod.lustre-MDT*/qos_threshold_rr' | sed -e 's/%//')
-	do_facet $SINGLEMDS lctl set_param -n \
-		'lod.lustre-MDT*/qos_threshold_rr' 100
+	local old_rr=$(do_facet $SINGLEMDS "$LCTL get_param -n \
+		lod.$FSNAME-MDT0000-*/qos_threshold_rr" | sed -e 's/%//')
+	do_facet $SINGLEMDS "$LCTL set_param -n \
+		lod.$FSNAME-MDT0000-*/qos_threshold_rr=100"
 	#define OBD_FAIL_MDS_LOV_CREATE_RACE     0x163
-	do_facet $SINGLEMDS "lctl set_param fail_loc=0x00000163"
+	do_facet $SINGLEMDS "$LCTL set_param fail_loc=0x00000163"
 
-	$SETSTRIPE -c -1 $DIR1/$tfile-1/file1 &
+	$LFS setstripe -c -1 $DIR1/$tfile-1/file1 &
 	local PID1=$!
 	sleep 1
-	$SETSTRIPE -c -1 $DIR2/$tfile-2/file2 &
+	$LFS setstripe -c -1 $DIR2/$tfile-2/file2 &
 	local PID2=$!
 	wait $PID2
 	wait $PID1
-	do_facet $SINGLEMDS "lctl set_param fail_loc=0x0"
-	do_facet $SINGLEMDS "lctl set_param -n \
-		'lod.lustre-MDT*/qos_threshold_rr' $old_rr"
+	do_facet $SINGLEMDS "$LCTL set_param fail_loc=0x0"
+	do_facet $SINGLEMDS "$LCTL set_param -n \
+		lod.$FSNAME-MDT0000-*/qos_threshold_rr=$old_rr"
 
-	$GETSTRIPE $DIR1/$tfile-1/file1
-	rc1=$($GETSTRIPE -q $DIR1/$tfile-1/file1 |
+	$LFS getstripe $DIR1/$tfile-1/file1
+	rc1=$($LFS getstripe -q $DIR1/$tfile-1/file1 |
 		awk '{if (/[0-9]/) print $1 }' | sort | uniq -d | wc -l)
-	$GETSTRIPE $DIR2/$tfile-2/file2
-	rc2=$($GETSTRIPE -q $DIR2/$tfile-2/file2 |
+	$LFS getstripe $DIR2/$tfile-2/file2
+	rc2=$($LFS getstripe -q $DIR2/$tfile-2/file2 |
 		awk '{if (/[0-9]/) print $1 }' | sort | uniq -d | wc -l)
 	echo "rc1=$rc1 and rc2=$rc2 "
 	[ $rc1 -eq 0 ] && [ $rc2 -eq 0 ] ||
@@ -4235,11 +4543,47 @@ test_93() {
 }
 run_test 93 "alloc_rr should not allocate on same ost"
 
+test_94() {
+	$LCTL set_param osc.*.idle_timeout=0
+	dd if=/dev/zero of=$DIR2/$tfile bs=4k count=2 conv=fsync
+
+	local before=$(date +%s)
+	local evict
+
+	$LCTL mark write
+#define OBD_FAIL_LDLM_PAUSE_CANCEL       0x312
+	$LCTL set_param fail_val=5 fail_loc=0x80000312
+	dd if=/dev/zero of=$DIR/$tfile conv=notrunc oflag=append bs=4k count=1 &
+	local pid=$!
+	sleep 2
+
+#define OBD_FAIL_LDLM_PAUSE_CANCEL_LOCAL 0x329
+	$LCTL set_param fail_val=6 fail_loc=0x80000329
+	$LCTL mark kill $pid
+	kill -ALRM $pid
+
+	dd if=/dev/zero of=$DIR2/$tfile conv=notrunc oflag=append bs=4k count=1
+
+	wait $pid
+	dd if=/dev/zero of=$DIR/$tfile bs=4k count=1 conv=fsync
+
+	evict=$(do_facet client $LCTL get_param \
+		osc.$FSNAME-OST*-osc-*/state |
+	    awk -F"[ [,]" '/EVICTED ]$/ { if (t<$5) {t=$5;} } END { print t }')
+
+	[ -z "$evict" ] || [[ $evict -le $before ]] ||
+		(do_facet client $LCTL get_param \
+			osc.$FSNAME-OST*-osc-*/state;
+		    error "eviction happened: $evict before:$before")
+	$LCTL set_param osc.*.idle_timeout=debug
+}
+run_test 94 "signal vs CP callback race"
+
 # Data-on-MDT tests
 test_100a() {
 	skip "Reserved for glimpse-ahead" && return
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	mkdir -p $DIR/$tdir
 
@@ -4250,21 +4594,20 @@ test_100a() {
 
 	$CHECKSTAT -t file -s 4096 $DIR/$tdir/dom || error "stat #1"
 	# first stat from server should return size data and save glimpse
-	local gls=$(lctl get_param -n mdc.*.stats | \
-		awk '/ldlm_glimpse/ {print $2}')
-	[ -z $gls ] || error "Unexpected $gls glimpse RPCs"
+	local gls=$(lctl get_param -n mdc.*.stats | grep -c ldlm_glimpse)
+	[ $gls -eq 0 ] || error "Unexpected $gls glimpse RPCs"
 	# second stat to check size is NOT cached on client without IO lock
 	$CHECKSTAT -t file -s 4096 $DIR/$tdir/dom || error "stat #2"
 
-	local gls=$(lctl get_param -n mdc.*.stats | grep ldlm_glimpse | wc -l)
-	[ "1" == "$gls" ] || error "Expect 1 glimpse RPCs but got $gls"
+	local gls=$(lctl get_param -n mdc.*.stats | grep -c ldlm_glimpse)
+	[ $gls -ge 1 ] || error "Expect glimpse RPCs but none"
 	rm -f $dom
 }
 run_test 100a "DoM: glimpse RPCs for stat without IO lock (DoM only file)"
 
 test_100b() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	mkdir -p $DIR/$tdir
 
@@ -4278,17 +4621,16 @@ test_100b() {
 	# second stat to check size is cached on client
 	$CHECKSTAT -t file -s 4096 $DIR/$tdir/dom || error "stat #2"
 
-	local gls=$(lctl get_param -n mdc.*.stats |
-			awk '/ldlm_glimpse/ {print $2}')
+	local gls=$(lctl get_param -n mdc.*.stats | grep -c ldlm_glimpse)
 	# both stats should cause no glimpse requests
-	[ -z $gls ] || error "Unexpected $gls glimpse RPCs"
+	[ $gls == 0 ] || error "Unexpected $gls glimpse RPCs"
 	rm -f $dom
 }
 run_test 100b "DoM: no glimpse RPC for stat with IO lock (DoM only file)"
 
 test_100c() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	mkdir -p $DIR/$tdir
 
@@ -4302,7 +4644,7 @@ test_100c() {
 	$CHECKSTAT -t file -s 2097152 $DIR/$tdir/dom ||
 		error "Wrong size from stat #1"
 
-	local gls=$(lctl get_param -n osc.*.stats | grep ldlm_glimpse | wc -l)
+	local gls=$(lctl get_param -n osc.*.stats | grep -c ldlm_glimpse)
 	[ $gls -eq 0 ] && error "Expect OST glimpse RPCs but got none"
 
 	rm -f $dom
@@ -4310,8 +4652,8 @@ test_100c() {
 run_test 100c "DoM: write vs stat without IO lock (combined file)"
 
 test_100d() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	mkdir -p $DIR/$tdir
 
@@ -4327,91 +4669,290 @@ test_100d() {
 	$CHECKSTAT -t file -s 4096 $DIR/$tdir/dom ||
 		error "Wrong size from stat #1"
 
-	local gls=$(lctl get_param -n osc.*.stats | grep ldlm_glimpse | wc -l)
+	local gls=$(lctl get_param -n osc.*.stats | grep -c ldlm_glimpse)
 	[ $gls -eq 0 ] && error "Expect OST glimpse but got none"
 
 	rm -f $dom
 }
 run_test 100d "DoM: write+truncate vs stat without IO lock (combined file)"
 
+test_100e() {
+	[ "$MDS1_VERSION" -lt $(version_code 2.11.50) ] &&
+		skip "Need MDS version at least 2.11.50"
+
+	local dom=$DIR/$tdir/dom
+	local dom2=$DIR2/$tdir/dom
+	mkdir -p $DIR/$tdir
+
+	$LFS setstripe -E 1024K -L mdt $DIR/$tdir
+
+	cancel_lru_locks mdc
+	dd if=/dev/urandom of=$dom bs=12000 count=1
+	$TRUNCATE $dom2 6000
+	cancel_lru_locks mdc
+	lctl set_param -n mdc.*.stats=clear
+	# expect read-on-open to return all data before write
+	cat /etc/hosts >> $dom
+	local read=$(lctl get_param -n mdc.*.stats | grep -c ost_read)
+	[[ $read -eq 0 ]] || error "Unexpected $read READ RPCs"
+}
+run_test 100e "DoM: read on open and file size"
+
 test_101a() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	$LFS setstripe -E 1024K -L mdt -E EOF $DIR1/$tfile
 	# to get layout
 	$CHECKSTAT -t file $DIR1/$tfile
 
-	OLD_VAL=$(cat /proc/sys/vm/dirty_writeback_centisecs)
-	echo 0 > /proc/sys/vm/dirty_writeback_centisecs
-	echo $OLD_VAL
+	local old_wb=$(sysctl -n vm.dirty_writeback_centisecs)
+	sysctl -wq vm.dirty_writeback_centisecs=0
+
+	trap "sysctl -wq vm.dirty_writeback_centisecs=$old_wb" EXIT
 
 	# open + IO lock
 	dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 ||
 		error_noexit "Write fails"
 	# must discard pages
 	lctl set_param -n mdc.*.stats=clear
-	rm $DIR2/$tfile || error_noexit "Unlink fails"
-	local writes=$(lctl get_param -n mdc.*.stats | grep ost_write | wc -l)
-	echo $OLD_VAL > /proc/sys/vm/dirty_writeback_centisecs
+	rm $DIR2/$tfile || error "Unlink fails"
 
+	local writes=$(lctl get_param -n mdc.*.stats | grep -c ost_write)
 	[ $writes -eq 0 ] || error "Found WRITE RPC but expect none"
 }
 run_test 101a "Discard DoM data on unlink"
 
 test_101b() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	$LFS setstripe -E 1024K -L mdt -E EOF $DIR1/$tfile
 	touch $DIR1/${tfile}_2
 	# to get layout
 	$CHECKSTAT -t file $DIR1/$tfile
 
-	OLD_VAL=$(cat /proc/sys/vm/dirty_writeback_centisecs)
-	echo 0 > /proc/sys/vm/dirty_writeback_centisecs
-	echo $OLD_VAL
+	local old_wb=$(sysctl -n vm.dirty_writeback_centisecs)
+	sysctl -wq vm.dirty_writeback_centisecs=0
+
+	trap "sysctl -wq vm.dirty_writeback_centisecs=$old_wb" EXIT
 
 	# open + IO lock
-	dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 ||
-		error_noexit "Write fails"
+	dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 || error "Write fails"
 	# must discard pages
 	lctl set_param -n mdc.*.stats=clear
-	mv $DIR2/${tfile}_2 $DIR2/$tfile || error_noexit "Rename fails"
-	local writes=$(lctl get_param -n mdc.*.stats | grep ost_write | wc -l)
-	echo $OLD_VAL > /proc/sys/vm/dirty_writeback_centisecs
+	mv $DIR2/${tfile}_2 $DIR2/$tfile || error "Rename fails"
+
+	local writes=$(lctl get_param -n mdc.*.stats | grep -c ost_write)
 	[ $writes -eq 0 ] || error "Found WRITE RPC but expect none"
 }
 run_test 101b "Discard DoM data on rename"
 
 test_101c() {
-	[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.10.55) ] &&
-		skip "Need MDS version at least 2.10.55" && return
+	[ "$MDS1_VERSION" -lt $(version_code 2.10.55) ] &&
+		skip "Need MDS version at least 2.10.55"
 
 	$LFS setstripe -E 1024K -L mdt -E EOF $DIR1/$tfile
 	# to get layout
 	$CHECKSTAT -t file $DIR1/$tfile
 
-	OLD_VAL=$(cat /proc/sys/vm/dirty_writeback_centisecs)
-	echo 0 > /proc/sys/vm/dirty_writeback_centisecs
-	echo $OLD_VAL
+	local old_wb=$(sysctl -n vm.dirty_writeback_centisecs)
+	sysctl -wq vm.dirty_writeback_centisecs=0
+
+	trap "sysctl -wq vm.dirty_writeback_centisecs=$old_wb" EXIT
 
 	# open + IO lock
-	dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 ||
-		error_noexit "Write fails"
+	dd if=/dev/zero of=$DIR1/$tfile bs=4096 count=1 || error "Write fails"
 	$MULTIOP $DIR1/$tfile O_c &
 	MULTIOP_PID=$!
 	sleep 1
 	lctl set_param -n mdc.*.stats=clear
-	rm $DIR2/$tfile > /dev/null || error_noexit "Unlink fails"
-	kill -USR1 $MULTIOP_PID && wait $MULTIOP_PID ||
-		error_noexit "multiop failure"
-	local writes=$(lctl get_param -n mdc.*.stats | grep ost_write | wc -l)
-	echo $OLD_VAL > /proc/sys/vm/dirty_writeback_centisecs
+	rm $DIR2/$tfile > /dev/null || error "Unlink fails for opened file"
+	kill -USR1 $MULTIOP_PID && wait $MULTIOP_PID || error "multiop failure"
+
+	local writes=$(lctl get_param -n mdc.*.stats | grep -c ost_write)
 	[ $writes -eq 0 ] || error "Found WRITE RPC but expect none"
 }
 run_test 101c "Discard DoM data on close-unlink"
 
+# test to verify file handle related system calls
+# (name_to_handle_at/open_by_handle_at)
+# The new system calls are supported in glibc >= 2.14.
+
+# test to verify we can open by handle an unlinked file from > 1 client
+# This test opens the file normally on $DIR1, which is on one mount, and then
+# opens it by handle on $DIR2, which is on a different mount.
+test_102() {
+	[ "$MDS1_VERSION" -lt $(version_code 2.11.57) ] &&
+		skip "Needs MDS version 2.11.57 or later"
+
+	echo "Test file_handle syscalls" > $DIR/$tfile ||
+		error "write failed"
+	check_fhandle_syscalls $DIR/$tfile $DIR2 ||
+		error "check_fhandle_syscalls failed"
+	rm -f $DIR2/$tfile
+}
+run_test 102 "Test open by handle of unlinked file"
+
+# Compare file size between first & second mount, ensuring the client correctly
+# glimpses even with unused speculative locks - LU-11670
+test_103() {
+	[ $OST1_VERSION -lt $(version_code 2.10.50) ] &&
+		skip "Lockahead needs OST version at least 2.10.50"
+
+	local locktest=23
+
+	test_mkdir -p $DIR/$tdir
+
+	# Force file on to OST0
+	$LFS setstripe -i 0 $DIR/$tdir
+
+	# Do not check multiple locks on glimpse
+	# OBD_FAIL_OSC_NO_SIZE_DATA 0x415
+	$LCTL set_param fail_loc=0x415
+
+	# Delay write commit by 2 seconds to guarantee glimpse wins race
+	# The same fail_loc is used on client & server so it can work in the
+	# single node sanity setup
+	do_facet ost1 $LCTL set_param fail_loc=0x415 fail_val=2
+
+	echo "Incorrect size expected (no glimpse fix):"
+	lockahead_test -d $DIR/$tdir -D $DIR2/$tdir -t $locktest -f $tfile
+	rc=$?
+	if [ $rc -eq 0 ]; then
+		echo "This doesn't work 100%, but this is just reproducing the bug, not testing the fix, so OK to not fail test."
+	fi
+
+	# guarantee write commit timeout has expired
+	sleep 2
+
+	# Clear fail_loc on client
+	$LCTL set_param fail_loc=0
+
+	# Delay write commit by 2 seconds to guarantee glimpse wins race
+	# OBD_FAIL_OST_BRW_PAUSE_BULK 0x214
+	do_facet ost1 $LCTL set_param fail_loc=0x214 fail_val=2
+
+	# Write commit is still delayed by 2 seconds
+	lockahead_test -d $DIR/$tdir -D $DIR2/$tdir -t $locktest -f $tfile
+	rc=$?
+	[ $rc -eq 0 ] || error "Lockahead test$locktest failed, $rc"
+
+	# guarantee write commit timeout has expired
+	sleep 2
+
+	rm -f $DIR/$tfile || error "unable to delete $DIR/$tfile"
+}
+run_test 103 "Test size correctness with lockahead"
+
+get_stat_xtimes()
+{
+	local xtimes
+
+	xtimes=$(stat -c "%X %Y %Z" $DIR/$tfile)
+
+	echo ${xtimes[*]}
+}
+
+get_mdt_xtimes()
+{
+	local mdtdev=$1
+	local output
+	local xtimes
+
+	output=$(do_facet mds1 "$DEBUGFS -c -R 'stat ROOT/$tfile' $mdtdev")
+	((xtimes[0]=$(awk -F ':' /atime/'{ print $2 }' <<< "$output")))
+	((xtimes[1]=$(awk -F ':' /mtime/'{ print $2 }' <<< "$output")))
+	((xtimes[2]=$(awk -F ':' /ctime/'{ print $2 }' <<< "$output")))
+
+	echo ${xtimes[*]}
+}
+
+check_mdt_xtimes()
+{
+	local mdtdev=$1
+	local xtimes=($(get_stat_xtimes))
+	local mdt_xtimes=($(get_mdt_xtimes $mdtdev))
+
+	echo "STAT a|m|ctime ${xtimes[*]}"
+	echo "MDT a|m|ctime ${xtimes[*]}"
+	[[ ${xtimes[0]} == ${mdt_xtimes[0]} ]] ||
+		error "$DIR/$tfile atime (${xtimes[0]}:${mdt_xtimes[0]}) diff"
+	[[ ${xtimes[1]} == ${mdt_xtimes[1]} ]] ||
+		error "$DIR/$tfile mtime (${xtimes[1]}:${mdt_xtimes[1]}) diff"
+	[[ ${xtimes[2]} == ${mdt_xtimes[2]} ]] ||
+		error "$DIR/$tfile ctime (${xtimes[2]}:${mdt_xtimes[2]}) diff"
+}
+
+test_104() {
+	[ "$mds1_FSTYPE" == "ldiskfs" ] || skip_env "ldiskfs only test"
+	[ $MDS1_VERSION -lt $(version_code 2.12.4) ] &&
+		skip "Need MDS version at least 2.12.4"
+
+	local pid
+	local mdtdev=$(mdsdevname ${SINGLEMDS//mds/})
+	local atime_diff=$(do_facet $SINGLEMDS \
+		lctl get_param -n mdd.*MDT0000*.atime_diff)
+
+	do_facet $SINGLEMDS \
+		lctl set_param -n mdd.*MDT0000*.atime_diff=0
+
+	stack_trap "do_facet $SINGLEMDS \
+		lctl set_param -n mdd.*MDT0000*.atime_diff=$atime_diff" EXIT
+
+	dd if=/dev/zero of=$DIR/$tfile bs=1k count=1 conv=notrunc
+	check_mdt_xtimes $mdtdev
+	sleep 2
+
+	dd if=/dev/zero of=$DIR/$tfile bs=1k count=1 conv=notrunc
+	check_mdt_xtimes $mdtdev
+	sleep 2
+	$MULTIOP $DIR2/$tfile Oz8192w8192_c &
+	pid=$!
+	sleep 2
+	dd if=/dev/zero of=$DIR/$tfile bs=1k count=1 conv=notrunc
+	sleep 2
+	kill -USR1 $pid && wait $pid || error "multiop failure"
+	check_mdt_xtimes $mdtdev
+
+	local xtimes
+	local mdt_xtimes
+
+	# Verify mtime/ctime is NOT upated on MDS when there is no modification
+	# on the client side
+	xtimes=($(get_stat_xtimes))
+	$MULTIOP $DIR/$tfile O_c &
+	pid=$!
+	sleep 2
+	kill -USR1 $pid && wait $pid || error "multiop failure"
+	mdt_xtimes=($(get_mdt_xtimes $mdtdev))
+	[[ ${xtimes[1]} == ${mdt_xtimes[1]} ]] ||
+		error "$DIR/$tfile mtime (${xtimes[1]}:${mdt_xtimes[1]}) diff"
+	[[ ${xtimes[2]} == ${mdt_xtimes[2]} ]] ||
+		error "$DIR/$tfile ctime (${xtimes[2]}:${mdt_xtimes[2]}) diff"
+	check_mdt_xtimes $mdtdev
+
+	sleep 2
+	# Change ctime via chmod
+	$MULTIOP $DIR/$tfile o_tc &
+	pid=$!
+	sleep 2
+	kill -USR1 $pid && wait $pid || error "multiop failure"
+	check_mdt_xtimes $mdtdev
+}
+run_test 104 "Verify that MDS stores atime/mtime/ctime during close"
+
+test_105() {
+	test_mkdir -p $DIR/$tdir
+	echo test > $DIR/$tdir/$tfile
+	$LCTL set_param fail_loc=0x416
+	cancel_lru_locks osc & sleep 1
+	fsize1=$(stat -c %s $DIR2/$tdir/$tfile)
+	wait
+	[[ $fsize1 = 5 ]] ||  error "Glimpse returned wrong file size $fsize1"
+}
+run_test 105 "Glimpse and lock cancel race"
+
 log "cleanup: ======================================================"
 
 # kill and wait in each test only guarentee script finish, but command in script