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-rw-r--r--lib/sasl/doc/src/appup.xml37
1 files changed, 31 insertions, 6 deletions
diff --git a/lib/sasl/doc/src/appup.xml b/lib/sasl/doc/src/appup.xml
index 89bcf23b5e..770b7c2492 100644
--- a/lib/sasl/doc/src/appup.xml
+++ b/lib/sasl/doc/src/appup.xml
@@ -319,12 +319,37 @@ point_of_no_return
<pre>
restart_new_emulator
</pre>
- <p>Shuts down the current emulator and starts a ne one. All
- processes are terminated gracefully. The new release must still
- be made permanent when the new emulator is up and running.
- Otherwise, the old emulator is started in case of a emulator
- restart. This instruction should be used when a new emulator is
- introduced, or if a complete reboot of the system should be done.</p>
+ <p>This instruction is used when erts, kernel, stdlib or sasl is
+ upgraded. It shuts down the current emulator and starts a new
+ one. All processes are terminated gracefully, and the new
+ version of erts, kernel, stdlib and sasl are used when the
+ emulator restarts. Only one <c>restart_new_emulator</c>
+ instruction is allowed in the relup, and it shall be placed
+ first. <seealso marker="systools#make_relup/3">systools:make_relup3,4</seealso>
+ will ensure this when the relup is generated. The rest of the
+ relup script is executed after the restart as a part of the boot
+ script.</p>
+ <p>An info report will be written when the upgrade is
+ completed. To programatically find out if the upgrade is
+ complete,
+ call <seealso marker="release_handler#which_releases/0">
+ release_handler:which_releases</seealso> and check if the
+ expected release has status <c>current</c>.</p>
+ <p>The new release must still be made permanent after the upgrade
+ is completed. Otherwise, the old emulator is started in case of
+ an emulator restart.</p>
+ <pre>
+restart_emulator
+ </pre>
+ <p>This instruction is similar to <c>restart_new_emulator</c>,
+ except it shall be placed at the end of the relup script. It is
+ not related to an upgrade of the emulator or the core
+ applications, but can be used by any application when a complete
+ reboot of the system is reqiured. When generating the
+ relup, <seealso marker="systools#make_relup/3">systools:make_relup/3,4</seealso>
+ ensures that there is only one <c>restart_emulator</c>
+ instruction and that it is the last instruction of the
+ relup.</p>
</section>
<section>