doc: Mention that services doing mounts should depend on user-file-systems.

This is a recent change. If the services do not depend on it, it's possible
user-file-systems will try to unmount the file systems byt itself first.

* doc/guix.texi (Shepherd Services): Mention services should depend on
user-file-systems if they do mounts.

Change-Id: I87f459aa43c2a59ffcae35750e02a08abc3c1f8a
Signed-off-by: Rutherther <rutherther@ditigal.xyz>

1 files changed, 5 insertions, 0 deletions

diff --git a/doc/guix.texi b/doc/guix.texi
index a2e2a8e5dfd..9ed23ebe805 100644
--- a/doc/guix.texi
+++ b/doc/guix.texi
@@ -49227,6 +49227,11 @@ daemons are started after all the file systems have been mounted and
 that, during shutdown, they are stopped before attempting to terminate
 remaining user processes.
 
+Similarly, services that do make mounts during their startup or operation,
+should have @code{user-file-systems} as a requirement. @code{user-processes}
+does depend on @code{user-file-systems} as well.
+So direct requirement only on @code{user-processes} is sufficient.
+
 @cindex one-shot services, for the Shepherd
 @item @code{one-shot?} (default: @code{#f})
 Whether this service is @dfn{one-shot}.  One-shot services stop immediately