+test_134a() {
+ [[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.7.54) ]] &&
+ skip "Need MDS version at least 2.7.54" && return
+
+ mkdir -p $DIR/$tdir || error "failed to create $DIR/$tdir"
+ cancel_lru_locks mdc
+
+ local nsdir="ldlm.namespaces.*-MDT0000-mdc-*"
+ local unused=$($LCTL get_param -n $nsdir.lock_unused_count)
+ [ $unused -eq 0 ] || "$unused locks are not cleared"
+
+ local nr=1000
+ createmany -o $DIR/$tdir/f $nr ||
+ error "failed to create $nr files in $DIR/$tdir"
+ unused=$($LCTL get_param -n $nsdir.lock_unused_count)
+
+ #define OBD_FAIL_LDLM_WATERMARK_LOW 0x327
+ do_facet mds1 $LCTL set_param fail_loc=0x327
+ do_facet mds1 $LCTL set_param fail_val=500
+ touch $DIR/$tdir/m
+
+ echo "sleep 10 seconds ..."
+ sleep 10
+ local lck_cnt=$($LCTL get_param -n $nsdir.lock_unused_count)
+
+ do_facet mds1 $LCTL set_param fail_loc=0
+ do_facet mds1 $LCTL set_param fail_val=0
+ [ $lck_cnt -lt $unused ] ||
+ error "No locks reclaimed, before:$unused, after:$lck_cnt"
+
+ rm $DIR/$tdir/m
+ unlinkmany $DIR/$tdir/f $nr
+}
+run_test 134a "Server reclaims locks when reaching low watermark"
+
+test_134b() {
+ [[ $(lustre_version_code $SINGLEMDS) -lt $(version_code 2.7.54) ]] &&
+ skip "Need MDS version at least 2.7.54" && return
+
+ mkdir -p $DIR/$tdir || error "failed to create $DIR/$tdir"
+ cancel_lru_locks mdc
+
+ local low_wm=$(do_facet mds1 $LCTL get_param -n ldlm.watermark_mb_low)
+ # disable reclaim temporarily
+ do_facet mds1 $LCTL set_param ldlm.watermark_mb_low=0
+
+ #define OBD_FAIL_LDLM_WATERMARK_HIGH 0x328
+ do_facet mds1 $LCTL set_param fail_loc=0x328
+ do_facet mds1 $LCTL set_param fail_val=500
+
+ $LCTL set_param debug=+trace
+
+ local nr=600
+ createmany -o $DIR/$tdir/f $nr &
+ local create_pid=$!
+
+ echo "Sleep $TIMEOUT seconds ..."
+ sleep $TIMEOUT
+ if ! ps -p $create_pid > /dev/null 2>&1; then
+ do_facet mds1 $LCTL set_param fail_loc=0
+ do_facet mds1 $LCTL set_param fail_val=0
+ do_facet mds1 $LCTL set_param ldlm.watermark_mb_low=$low_wm
+ error "createmany finished incorrectly!"
+ fi
+ do_facet mds1 $LCTL set_param fail_loc=0
+ do_facet mds1 $LCTL set_param fail_val=0
+ do_facet mds1 $LCTL set_param ldlm.watermark_mb_low=$low_wm
+ wait $create_pid || return 1
+
+ unlinkmany $DIR/$tdir/f $nr
+}
+run_test 134b "Server rejects lock request when reaching high watermark"
+