On Wed, Dec 01, 2021 at 09:56:21AM -0500, Waiman Long wrote: > Right, I shouldn't say corner cases. Having task in an intermediate > partition is possible depending on event sequence. I am aware that there are > code in the cpuset code to prevent that, but it didn't block all cases. > > > A valid parent partition may distribute out all its CPUs to > > > its child partitions as long as there is no task associated with it. > > Assuming there's always at least one kernel thread in the root cgroup > > that can't be migrated anyway.] > > I am aware of that. That is why I said root cgroup must have at least one > cpu in its "cpuset.cpus.effective". In that case, let's explicitly describe that condition. Thanks. -- tejun
