To notify user of kill events from systemd-oomd we now use
`SERVICE_FAILURE_OOM_KILL` as the failure result.
`unit_check_oomd_kill` now calls `notify_cgroup_oom` to
update the service result to `oom-kill`.
We add a new xattr `user.oomd_ooms` to keep track of the OOM kills
initiated by systemd-oomd, this helps us resolve a race between sending
SIGKILL to processes and checking for OOM kill status from the xattr.
Related to: #20649
Check if process(es) of a cgroup were killed by Kernel OOM killer
or systemd-oomd before we send the cgroup empty notification.
This allows us to show the right exit state(ServiceResult)
Migrate logind to use the new macros to declare a D-Bus method or signal.
Replaced SD_BUS_METHOD_WITH_NAMES with SD_BUS_METHOD_WITH_ARGS.
Replaced SD_BUS_SIGNAL_WITH_NAMES with SD_BUS_SIGNAL_WITH_ARGS.
systemd-analyze critical-chain accepts an optional unit argument,
however currently there's no shell-completion for it
This change provides unit name completion for both bash and zsh.
Closes: #20927
Nishal Kulkarni