man: be clearer that it's not OK to manipulate systemd's own cgroup hirearchy

diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml
index 69ee4fc5e88c71b4168711d4350d6534f5a296b7..c25d96e9fdde0c9aa4fb0dbfb6a1d809d937b85e 100644 (file)
--- a/man/systemd.exec.xml
+++ b/man/systemd.exec.xml
@@ -825,8 +825,11 @@
                                 in specific paths in specific kernel
                                 controller hierarchies. It is not
                                 recommended to manipulate the service
                                 in specific paths in specific kernel
                                 controller hierarchies. It is not
                                 recommended to manipulate the service

-                                control group path in the systemd
-                                named hierarchy. For details about
+                                control group path in the private
+                                systemd named hierarchy
+                                (i.e. <literal>name=systemd</literal>),
+                                and doing this might result in
+                                undefined behaviour. For details about

                                 control groups see <ulink
                                 url="http://www.kernel.org/doc/Documentation/cgroups/cgroups.txt">cgroups.txt</ulink>.</para>
 
                                 control groups see <ulink
                                 url="http://www.kernel.org/doc/Documentation/cgroups/cgroups.txt">cgroups.txt</ulink>.</para>