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

On 7/26/21 6:59 PM, Tejun Heo wrote:

On Tue, Jul 20, 2021 at 10:18:27AM -0400, Waiman Long wrote:

quoted

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@redhat.com>

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