Hello, On Thu, Jun 03, 2021 at 05:24:14PM -0400, Waiman Long wrote: > @@ -2181,6 +2192,13 @@ static int cpuset_can_attach(struct cgroup_taskset *tset) > (cpumask_empty(cs->cpus_allowed) || nodes_empty(cs->mems_allowed))) > goto out_unlock; > > + /* > + * On default hierarchy, task cannot be moved to a cpuset with empty > + * effective cpus. > + */ > + if (is_in_v2_mode() && cpumask_empty(cs->effective_cpus)) > + goto out_unlock; > + This is inconsistent with how other events which leave a root partition empty is handled. Woudln't it be more consistent to switch the parent to PRS_ERROR and behave accordingly but allow it to have valid child roots? Thanks. -- tejun
