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Document an edge-case with resume and mounting (#4581)

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When trying to read keyfiles from an encrypted partition to unlock the swap,
a cyclic dependency is generated because systemd can not mount the
filesystem before it has checked if there is a swap to resume from.

Closes #3940
This commit is contained in:
Janne Heß 2016-11-23 05:19:56 +01:00 committed by Zbigniew Jędrzejewski-Szmek
parent c5c755e1bc
commit 6d9e45e97f
1 changed files with 7 additions and 0 deletions
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7
man/bootup.xml
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@ -179,6 +179,13 @@
identical to the system manager bootup (see above) until it
reaches <filename>basic.target</filename>. From there, systemd
approaches the special target <filename>initrd.target</filename>.
Before any file systems are mounted, it must be determined whether
the system will resume from hibernation or proceed with normal boot.
This is accomplished by <filename>systemd-hibernate-resume@.service</filename>
which must be finished before <filename>local-fs-pre.target</filename>,
so no filesystems can be mounted before the check is complete.
When the root device becomes available,
<filename>initd-root-device.target</filename> is reached.
If the root device can be mounted at