Re: [PATCH v2 0/2] cgroup/cpuset: Make cpuset hotplug processing synchronous

[Tejun Heo]

On Thu, Apr 04, 2024 at 09:47:47AM -0400, Waiman Long wrote:
>  v2:
>   - Found that rebuild_sched_domains() has external callers, revert its
>     change and introduce rebuild_sched_domains_cpuslocked() instead.
> 
> As discussed in the LKML thread [1], the asynchronous nature of cpuset
> hotplug handling code is causing problem with RCU testing. With recent
> changes in the way locking is being handled in the cpuset code, it is
> now possible to make the cpuset hotplug code synchronous again without
> major changes.
> 
> This series enables the hotplug code to call directly into cpuset hotplug
> core without indirection with the exception of the special case of v1
> cpuset becoming empty still being handled indirectly with workqueue.
> 
> A new simple test case was also written to test this special v1 cpuset
> case. The test_cpuset_prs.sh script was also run with LOCKDEP on to
> verify that there is no regression.

Applied to cgroup/for-6.10. Hopefully, this one will work out. Thanks for
working on this.

-- 
tejun