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systemd: do not enable udev-settle.service by default

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This barrier service is usually not enabled by default. If enabled,
it acts as a barrier for basic.target -- so all later services will
wait for udev completely finishing its coldplug run.

It might be enabled just unconditionally, or pulled-in on-demand by
broken or non-hotplug-aware services that assume a fully populated
/dev at startup.
This commit is contained in:
Kay Sievers 2011-03-29 01:14:53 +02:00
parent b4155660f2
commit ce440d1c1b
3 changed files with 18 additions and 1 deletions
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1
Makefile.am
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@ -137,7 +137,6 @@ systemd-install-hook:
mkdir -p $(DESTDIR)$(systemdsystemunitdir)/basic.target.wants
ln -sf ../udev.service $(DESTDIR)$(systemdsystemunitdir)/basic.target.wants/udev.service
ln -sf ../udev-trigger.service $(DESTDIR)$(systemdsystemunitdir)/basic.target.wants/udev-trigger.service
ln -sf ../udev-settle.service $(DESTDIR)$(systemdsystemunitdir)/basic.target.wants/udev-settle.service
INSTALL_DATA_HOOKS += systemd-install-hook
endif

7
NEWS
View File

@ -19,6 +19,13 @@ is preserved for the udev version started in the rootfs.
The command 'udevadm info --convert-db' is gone. The udev daemon
itself, at startup, converts any old database version if necessary.
The systemd services files have been reorganized. The udev control
socket is bound by systemd and passed to the started udev daemon.
The udev-settle.service is no longer active by default. Services which
can not handle hotplug setups properly need to actively pull it in to
act like a barrier for basic.target. Alternatively the settle service
can be unconditionally 'systemctl'enabled to work-around such services.
The fstab_import callout is no longer built or installed. Udev
should not be used to mount, does not watch changes to fstab, and
should not mirror fstab values in the udev database.

11
init/udev-settle.service.in
View File

@ -1,3 +1,11 @@
# This barrier service is usually not enabled by default. If enabled,
# it acts as a barrier for basic.target -- so all later services will
# wait for udev completely finishing its coldplug run.
#
# It might be enabled just unconditionally, or pulled-in on-demand by
# broken or non-hotplug-aware services that assume a fully populated
# /dev at startup.
[Unit]
Description=udev Wait for Complete Device Initialization
DefaultDependencies=no
@ -8,3 +16,6 @@ Before=basic.target
Type=oneshot
RemainAfterExit=yes
ExecStart=@sbindir@/udevadm settle
[Install]
WantedBy=basic.target