On Friday 13 Nov 2020 at 09:37:14 (+0000), Will Deacon wrote: > If the scheduler cannot find an allowed CPU for a task, > cpuset_cpus_allowed_fallback() will widen the affinity to cpu_possible_mask > if cgroup v1 is in use. > > In preparation for allowing architectures to provide their own fallback > mask, just return early if we're not using cgroup v2 and allow > select_fallback_rq() to figure out the mask by itself. > > Cc: Li Zefan <[email protected]> > Cc: Tejun Heo <[email protected]> > Cc: Johannes Weiner <[email protected]> > Signed-off-by: Will Deacon <[email protected]>
That makes select_fallback_rq() slightly more expensive if you're using cgroup v1, but I don't expect that be really measurable in real-world workloads, so: Reviewed-by: Quentin Perret <[email protected]> Thanks, Quentin
