From 85f85783569c4a662262c7b7579fb130d25ccd42 Mon Sep 17 00:00:00 2001 From: Jan Engelhardt Date: Thu, 7 Nov 2013 01:17:49 +0100 Subject: [PATCH] man: add rationale into systemd-halt(8) The explanation is from http://people.debian.org/~stapelberg/docs/systemd-dependencies.html --- man/systemd-halt.service.xml | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/man/systemd-halt.service.xml b/man/systemd-halt.service.xml index 812281e..90b443f 100644 --- a/man/systemd-halt.service.xml +++ b/man/systemd-halt.service.xml @@ -83,6 +83,12 @@ remaining swap devices, detach all remaining storage devices and kill all remaining processes. + It is necessary to have this code in a separate binary + because otherwise rebooting after an upgrade might be broken — + the running PID 1 could still depend on libraries which are not + available any more, thus keeping the filesystem busy, which + then cannot be re-mounted read-only. + Immediately before executing the actual system halt/poweroff/reboot/kexec systemd-shutdown will run all