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Alan Jenkins d8e5a93382 slice: system.slice should be perpetual like -.mount 
`-.mount` is placed in `system.slice`, and hence depends on it.
`-.mount` is always active and can never be stopped.  Therefore the same
should be true of `system.slice`.

Synthesize it as perpetual (unless systemd is running as a user manager).
Notice we also drop `Before=slices.target` as unnecessary.

AFAICS the justification for `perpetual` is to provide extra protection
against unintentionally stopping every single service.  So adding
system.slice to the perpetual units is perfectly consistent.

I don't expect this will (or can) fix any other problem.  And the
`perpetual` protection probably isn't formal enough to spend much time
thinking about.  I've just noticed this a couple of times, as something
that looks strange.

Might be a bit surprising that we have user.slice on-disk but not
system.slice, but I think it's ok. `systemctl status system.slice` will
still point you towards `man systemd.special`.  The only detail is that the
system slice disables `DefaultDependencies`.  If you're worrying about how
system shutdown works when you read `man systemd.slice`, I think it is not
too hard to guess that system.slice might do this:

> Only slice units involved with early boot
> or late system shutdown should disable this option

(Docs are great. I really appreciate the systemd ones).
2018-02-04 22:51:34 +00:00
..
user Hook up systemd-tmpfiles as user units 2017-12-06 10:19:35 +01:00
basic.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
bluetooth.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
busnames.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
console-getty.service.m4.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
container-getty@.service.m4.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
cryptsetup-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
cryptsetup.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
debug-shell.service.in units: link up debug-generator documentation from debug-shell.service 2017-12-26 12:13:51 +01:00
dev-hugepages.mount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
dev-mqueue.mount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
emergency.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
emergency.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
exit.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
final.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
getty-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
getty.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
getty@.service.m4 Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
graphical.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
halt-local.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
halt.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
hibernate.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
hybrid-sleep.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-cleanup.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-fs.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-parse-etc.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-root-device.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-root-fs.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-switch-root.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-switch-root.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd-udevadm-cleanup-db.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
initrd.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
kexec.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
kmod-static-nodes.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
ldconfig.service Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
local-fs-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
local-fs.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
machine.slice Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
machines.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
meson-add-wants.sh separate flags from shebang 2017-12-25 19:48:49 +01:00
meson.build slice: system.slice should be perpetual like -.mount 2018-02-04 22:51:34 +00:00
multi-user.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
network-online.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
network-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
network.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
nss-lookup.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
nss-user-lookup.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
paths.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
poweroff.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
printer.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
proc-sys-fs-binfmt_misc.automount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
proc-sys-fs-binfmt_misc.mount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
quotaon.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
rc-local.service.in man: add a systemd-rc-local-generator(8) man page 2017-12-26 12:13:51 +01:00
reboot.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
remote-cryptsetup.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
remote-fs-pre.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
remote-fs.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
rescue.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
rescue.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
rpcbind.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
serial-getty@.service.m4 Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
shutdown.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sigpwr.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sleep.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
slices.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
smartcard.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sockets.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sound.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
suspend.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
swap.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sys-fs-fuse-connections.mount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sys-kernel-config.mount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sys-kernel-debug.mount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
sysinit.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
syslog.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
system-update-cleanup.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
system-update.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-ask-password-console.path Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-ask-password-console.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-ask-password-wall.path Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-ask-password-wall.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-backlight@.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-binfmt.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-coredump.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-coredump@.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-exit.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-firstboot.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-fsck-root.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-fsck@.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-halt.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hibernate-resume@.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hibernate.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hostnamed.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hwdb-update.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-hybrid-sleep.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-importd.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-initctl.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-initctl.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journal-catalog-update.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journal-flush.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journal-gatewayd.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journal-gatewayd.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journal-remote.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journal-remote.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journal-upload.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journald-audit.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journald-dev-log.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journald.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-journald.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-kexec.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-localed.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-logind.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-machine-id-commit.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-machined.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-modules-load.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-networkd-wait-online.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-networkd.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-networkd.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-nspawn@.service.in nspawn: turn on watchdog logic for nspawn too 2017-12-07 12:34:46 +01:00
systemd-poweroff.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-quotacheck.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-random-seed.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-reboot.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-remount-fs.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-resolved.service.in resolved.service: set DefaultDependencies=no 2018-01-11 12:40:44 +01:00
systemd-rfkill.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-rfkill.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-suspend.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-sysctl.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-sysusers.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-timedated.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-timesyncd.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-tmpfiles-clean.service.in units: use SuccessExitStatus to ignore syntax errors in tmpfiles 2017-12-01 18:58:54 +01:00
systemd-tmpfiles-clean.timer Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-tmpfiles-setup-dev.service.in units: use SuccessExitStatus to ignore syntax errors in tmpfiles 2017-12-01 18:58:54 +01:00
systemd-tmpfiles-setup.service.in units: use SuccessExitStatus to ignore syntax errors in tmpfiles 2017-12-01 18:58:54 +01:00
systemd-udev-settle.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-udev-trigger.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-udevd-control.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-udevd-kernel.socket Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-udevd.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-update-done.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-update-utmp-runlevel.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-update-utmp.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-user-sessions.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-vconsole-setup.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
systemd-volatile-root.service.in Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
time-sync.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
timers.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
tmp.mount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
umount.target Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
user.slice Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00
user@.service.in units: delegate only "cpu" and "pids" controllers by default (#7564) 2017-12-07 08:48:08 +01:00
var-lib-machines.mount Add SPDX license headers to unit files 2017-11-19 19:08:15 +01:00