name : dm-event.service [Unit] Description=Device-mapper event daemon Documentation=man:dmeventd(8) Requires=dm-event.socket After=dm-event.socket Before=local-fs-pre.target shutdown.target Conflicts=shutdown.target DefaultDependencies=no [Service] Type=simple ExecStart=/usr/sbin/dmeventd -f Environment=SD_ACTIVATION=1 PIDFile=/run/dmeventd.pid OOMScoreAdjust=-1000