26 Jul
2021
26 Jul
'21
10:59 p.m.
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@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.
--
tejun