tests: check memory locking

Check reserved memory and stack is able to disable mlocking.

test/shell/mlock-no-locking.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+# Copyright (C) 2025 Red Hat, Inc. All rights reserved.
+#
+# This copyrighted material is made available to anyone wishing to use,
+# modify, copy, or redistribute it subject to the terms and conditions
+# of the GNU General Public License v.2.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+#
+# Check whether activation without memory locking works as expected
+. lib/inittest
+
+aux prepare_vg
+
+lvcreate -L1 -n $lv1 $vg
+
+# Create snapshot which normally requires suspend -> locking memory
+lvcreate -s -L1 $vg/$lv1 -vvvv &> log
+
+grep "Locking memory" log
+
+# This should be making snapshot without memory locking
+lvcreate -s --config 'activation/reserved_memory=0' -L1 $vg/$lv1 -vvvv &> log
+grep "Skipping memory locking" log
+not grep "Locking memory" log
+
+lvcreate -s --config 'activation/reserved_stack=0' -L1 $vg/$lv1 -vvvv &> log
+grep "Skipping memory locking" log
+not grep "Locking memory" log
+
+lvcreate -s --config 'activation/reserved_stack=0 activation/reserved_memory=0' -L1 $vg/$lv1 -vvvv &> log
+grep "Skipping memory locking" log
+not grep "Locking memory" log
+
+vgremove -f $vg