DMEVENTD(8) System Manager's Manual DMEVENTD(8) (NAME) dmeventd - Device-Mapper (SYNOPSIS) dmeventd [-d [-d [-d]]] [-e exit_on_path] [-f] [-g seconds] [-h] [-i] [-l] [-R] [-V] [-?] (DESCRIPTION) dmeventd (device-mapper) . . (OPTIONS) -d (-d, -dd, -ddd) (debug) syslog. d . -e exit_on_path (SIGINT, SIGTERM) . . "" . "/run/nologin" . -f (Don't fork) . -g seconds (grace period) (- : ). . (overhead) . . -h . -i . . . -l stdout stderr syslog. -f . -? stderr. -R dmeventd. dmeventd 2.02.77 . dmeventd . -V dmeventd. LVM (LVM PLUGINS) Mirror . : lvm.conf(5). Raid . : lvm.conf(5). Snapshot (snapshot) syslog . . : lvm.conf(5). (mount) (umount) . Thin (thin pool) syslog . . : lvm.conf(5). ( ) thin dmeventd/thin_command . lvm lvextend --use-policies activation/thin_pool_autoextend_threshold . thin dmeventd . . fstrim(8) lvextend --use-policies . LVM_RUN_BY_DMEVENTD=1 lvm2 dmeventd . : DMEVENTD_THIN_POOL_DATA DMEVENTD_THIN_POOL_METADATA. lvs(8) . Vdo VDO syslog . VDO . : lvm.conf(5). VDO vdo dmeventd/ vdo_command . lvm lvextend --use-policies VDO activation/ vdo_pool_autoextend_threshold . vdo dmeventd . VDO . fstrim(8) lvextend --use-policies . LVM_RUN_BY_DMEVENTD=1 lvm2 dmeventd . VDO : DMEVENTD_VDO_POOL. lvs(8) . (ENVIRONMENT VARIABLES) DMEVENTD_THIN_POOL_DATA thin . . . DMEVENTD_THIN_POOL_METADATA thin . . . DMEVENTD_VDO_POOL vdo . VDO . . LVM_RUN_BY_DMEVENTD thin vdo (recursive) dmeventd lvm2 thin_command vdo_command . (SEE ALSO) lvm(8), lvm.conf(5), lvextend(8), fstrim(8) Red Hat, Inc. DM TOOLS 2.03.42(2) (2026-08-06) DMEVENTD(8)