Re: [PATCH 05/10] cgroup/cpuset: Don't allow creation of local partition over a remote one

[Waiman Long]

On 4/3/25 9:33 AM, Michal Koutný wrote:
> On Sun, Mar 30, 2025 at 05:52:43PM -0400, Waiman Long <longman@xxxxxxxxxx> wrote:
> > Currently, we don't allow the creation of a remote partition underneath
> > another local or remote partition. However, it is currently possible to
> > create a new local partition with an existing remote partition underneath
> > it if top_cpuset is the parent. However, the current cpuset code does
> > not set the effective exclusive CPUs correctly to account for those
> > that are taken by the remote partition.
> That sounds like
> Fixes: 181c8e091aae1 ("cgroup/cpuset: Introduce remote partition")
>
> (but it's merge, so next time :-)

Commit ee8dde0cd2ce ("cpuset: Add new v2 cpuset.sched.partition flag") 
is actually the first commit that introduces the concept of cpuset 
partition which is basically the local partition that I am referring to 
now. It is that commit that did the  partition cleanup in 
cpuset_css_offline() which is now being moved to the new 
cpuset_css_killed() callback function.

Thanks,
Longman