Re: [PATCH v2 2/6] sched/cpuset: Bring back cpuset_mutex

Peter Zijlstra
2023-05-04T06:21:39Z

On Wed, May 03, 2023 at 09:22:24AM +0200, Juri Lelli wrote:
> Turns out percpu_cpuset_rwsem - commit 1243dc518c9d ("cgroup/cpuset:
> Convert cpuset_mutex to percpu_rwsem") - wasn't such a brilliant idea,
> as it has been reported to cause slowdowns in workloads that need to
> change cpuset configuration frequently and it is also not implementing
> priority inheritance (which causes troubles with realtime workloads).

What were they doing ? Dynamically adjusting the DL parameters?