Re: [PATCH v3 2/9] cgroup/cpuset: Fix a partition bug with hotplug

[Waiman Long]

On 7/26/21 6:59 PM, Tejun Heo wrote:
> On Tue, Jul 20, 2021 at 10:18:27AM -0400, Waiman Long wrote:
> > In cpuset_hotplug_workfn(), the detection of whether the cpu list
> > has been changed is done by comparing the effective cpus of the top
> > cpuset with the cpu_active_mask. However, in the rare case that just
> > all the CPUs in the subparts_cpus are offlined, the detection fails
> > and the partition states are not updated correctly. Fix it by forcing
> > the cpus_updated flag to true in this particular case.
> >
> > Fixes: 4b842da276a8 ("cpuset: Make CPU hotplug work with partition")
> > Signed-off-by: Waiman Long <longman@xxxxxxxxxx>
> Applied to cgroup/for-5.15 w/ a minor update to the comment (I dropped
> "just" before "all". It read weird to me.)
>
> Thanks.
Thanks for fixing the wording.

Cheers,
Longman