diff options
| -rw-r--r-- | Documentation/cgroup-v2.txt | 5 | ||||
| -rw-r--r-- | kernel/cgroup/cgroup.c | 7 |
2 files changed, 3 insertions, 9 deletions
diff --git a/Documentation/cgroup-v2.txt b/Documentation/cgroup-v2.txt index cb9ea281ab72..dec5afdaa36d 100644 --- a/Documentation/cgroup-v2.txt +++ b/Documentation/cgroup-v2.txt @@ -274,8 +274,9 @@ thread mode, the following conditions must be met. - As the cgroup will join the parent's resource domain. The parent must either be a valid (threaded) domain or a threaded cgroup. -- The cgroup must be empty. No enabled controllers, child cgroups or - processes. +- When the parent is an unthreaded domain, it must not have any domain + controllers enabled or populated domain children. The root is + exempt from this requirement. Topology-wise, a cgroup can be in an invalid state. Please consider the following toplogy:: diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index e9a377dc5bdb..e0a558c4d358 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -3147,13 +3147,6 @@ static int cgroup_enable_threaded(struct cgroup *cgrp) return -EOPNOTSUPP; /* - * Allow enabling thread mode only on empty cgroups to avoid - * implicit migrations and recursive operations. - */ - if (cgroup_has_tasks(cgrp) || css_has_online_children(&cgrp->self)) - return -EBUSY; - - /* * The following shouldn't cause actual migrations and should * always succeed. */ |