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-rw-r--r--src/systemd-nspawn/nspawn.c8
-rw-r--r--src/systemd-nspawn/systemd-nspawn.xml7
2 files changed, 11 insertions, 4 deletions
diff --git a/src/systemd-nspawn/nspawn.c b/src/systemd-nspawn/nspawn.c
index 25376d0b28..5f5e21c0f4 100644
--- a/src/systemd-nspawn/nspawn.c
+++ b/src/systemd-nspawn/nspawn.c
@@ -217,9 +217,13 @@ static void help(void) {
" --uuid=UUID Set a specific machine UUID for the container\n"
" -S --slice=SLICE Place the container in the specified slice\n"
" --property=NAME=VALUE Set scope unit property\n"
- " -U --private-users=pick Run within user namespace, autoselect UID/GID range\n"
- " --private-users[=UIDBASE[:NUIDS]]\n"
+ " --private-users[=yes] Run within user namespace, detect UID/GID range\n"
+ " --private-users=UIDBASE[:NUIDS]\n"
" Similar, but with user configured UID/GID range\n"
+ " --private-users=pick Similar, but autoselect an unused UID/GID range,\n"
+ " implies --private-users-chown"
+ " -U If the kernel supports the user namespaces feature,\n"
+ " equivalent to --private-users=pick; otherwise ignored\n"
" --private-users-chown Adjust OS tree ownership to private UID/GID range\n"
" --private-network Disable network in container\n"
" --network-interface=INTERFACE\n"
diff --git a/src/systemd-nspawn/systemd-nspawn.xml b/src/systemd-nspawn/systemd-nspawn.xml
index c449edee89..0019f948b1 100644
--- a/src/systemd-nspawn/systemd-nspawn.xml
+++ b/src/systemd-nspawn/systemd-nspawn.xml
@@ -881,8 +881,11 @@
<command>systemd-nspawn</command> is invoked from within a
service unit, and the service unit's sole purpose is to run a
single <command>systemd-nspawn</command> container. This
- option is not available if run from a user
- session.</para></listitem>
+ option is not available if run from a user session. If using
+ the cgroup v2 unified hierarchy, this assumes that
+ <command>systemd-nspawn</command> has the control group all to
+ itself; that it is the only process in the
+ group.</para></listitem>
</varlistentry>
<varlistentry>