I took a look a the newest LVM package. It has a udev rules file, 11
-dm-lvm.rules, which looks like it should do fine to create the symlinks
for valid lvs. Does vgchange -ay do more than that? Here is the file:
# Copyright (C) 2009 Red Hat, Inc. All rights reserved.
#
# This file is part of LVM2.
# Udev rules for LVM.
#
# These rules create symlinks for LVM logical volumes in
# /dev/VG directory (VG is an actual VG name). Some udev
# environment variables are set (they can be used in later
# rules as well):
# DM_LV_NAME - logical volume name
# DM_VG_NAME - volume group name
# DM_LV_LAYER - logical volume layer (blank if not set)
# "add" event is processed on coldplug only!
ACTION!="add|change", GOTO="lvm_end"
ENV{DM_UDEV_RULES_VSN}!="?*", GOTO="lvm_end"
ENV{DM_UUID}!="LVM-?*", GOTO="lvm_end"
# Use DM name and split it up into its VG/LV/layer constituents.
IMPORT{program}="$env{DM_SBIN_PATH}/dmsetup splitname --nameprefixes
--noheadings --rows $env{DM_NAME}"
ENV{DM_UDEV_DISABLE_SUBSYSTEM_RULES_FLAG}=="1", GOTO="lvm_end"
# Do not create symlinks for inappropriate subdevices.
ENV{DM_LV_NAME}=="pvmove?*|?*_vorigin", GOTO="lvm_disable"
ENV{DM_LV_LAYER}=="?*", GOTO="lvm_disable"
# Create symlinks for top-level devices only.
ENV{DM_VG_NAME}=="?*", ENV{DM_LV_NAME}=="?*",
SYMLINK+="$env{DM_VG_NAME}/$env{DM_LV_NAME}", GOTO="lvm_end"
LABEL="lvm_disable"
ENV{DM_UDEV_DISABLE_DISK_RULES_FLAG}="1"
ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}="1"
OPTIONS:="nowatch"
LABEL="lvm_end"
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https://bugs.launchpad.net/bugs/833891
Title:
lvscan often times out during boot
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