@@ -848,8 +848,10 @@ you refer to it on the command line.

 > children) for security reasons, and to ensure repeatable builds on remote

 > Docker hosts. This is also the reason why `ADD ../file` will not work.

-`docker build` has a `--cgroup-parent` option that causes the containers used

-in the build to be run with this option.

+When `docker build` is run with the `--cgroup-parent` option the containers used

+in the build will be run with the [corresponding `docker run`

+flag](/reference/run/#specifying-custom-cgroups). 

+

 ## commit

@@ -465,6 +465,13 @@ Note:

 You would have to write policy defining a `svirt_apache_t` type.

+## Specifying custom cgroups

+

+Using the `--cgroup-parent` flag, you can pass a specific cgroup to run a

+container in. This allows you to create and manage cgroups on their own. You can

+define custom resources for those cgroups and put containers under a common

+parent group.

+

 ## Runtime constraints on resources

 The operator can also adjust the performance parameters of the