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Blame SOURCES/0091-man-add-rationale-into-systemd-halt-8.patch

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From e701defc239f63731940b8d0867405e0b36b9ada Mon Sep 17 00:00:00 2001
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From: Jan Engelhardt <jengelh@inai.de>
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Date: Thu, 7 Nov 2013 01:17:49 +0100
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Subject: [PATCH] man: add rationale into systemd-halt(8)
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The explanation is from
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http://people.debian.org/~stapelberg/docs/systemd-dependencies.html
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---
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 man/systemd-halt.service.xml | 6 ++++++
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 1 file changed, 6 insertions(+)
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diff --git a/man/systemd-halt.service.xml b/man/systemd-halt.service.xml
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index 812281e..90b443f 100644
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--- a/man/systemd-halt.service.xml
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+++ b/man/systemd-halt.service.xml
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@@ -83,6 +83,12 @@
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                 remaining swap devices, detach all remaining storage
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                 devices and kill all remaining processes.</para>
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+                <para>It is necessary to have this code in a separate binary
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+                because otherwise rebooting after an upgrade might be broken —
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+                the running PID 1 could still depend on libraries which are not
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+                available any more, thus keeping the filesystem busy, which
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+                then cannot be re-mounted read-only.</para>
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+
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                 <para>Immediately before executing the actual system
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                 halt/poweroff/reboot/kexec
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                 <filename>systemd-shutdown</filename> will run all