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1d640a044f
We have the following timestamp status:
$ systemctl show systemd-fsck-root.service | grep InactiveExitTimestamp
InactiveExitTimestamp=Thu 2023-11-02 12:27:24 CET
InactiveExitTimestampMonotonic=15143158
$ systemctl show | grep UserspaceTimestamp
UserspaceTimestamp=Thu 2023-11-02 12:27:25 CET
UserspaceTimestampMonotonic=15804273
i.e. UserspaceTimestamp is before InactiveExit of systemd-fsck-root.service.
This is fine, but on display, we'd subtract those values and print a huge
negative value bogusly:
$ build/systemd-analyze critical-chain systemd-remount-fs.service
The time when unit became active or started is printed after the "@" character.
The time the unit took to start is printed after the "+" character.
systemd-remount-fs.service +137ms
└─systemd-fsck-root.service @584542y 2w 2d 20h 1min 48.890s +45ms
└─systemd-journald.socket
└─system.slice
└─-.slice
In fact, list_dependencies_print() already had a branch where the check that
'times->activating > boot->userspace_time', but it didn't cover all cases. So
make it cover both branches, and also change to '>=', since it's fine if
something happened with the same timestamp.
With the patch:
$ build/systemd-analyze critical-chain systemd-remount-fs.service
The time when unit became active or started is printed after the "@" character.
The time the unit took to start is printed after the "+" character.
systemd-remount-fs.service +42ms
└─systemd-fsck-root.service
└─systemd-journald.socket
└─system.slice
└─-.slice
Fixes https://github.com/systemd/systemd/issues/17191.