On Fri, Aug 12, 2022 at 08:36:17PM +0800, Chengming Zhou [off-list ref] wrote:

Could you help take a look if there is anything to improve?

Thanks, just a little nit.

+       The reason this control attribute exists is that PSI accounts stalls for
+       each cgroup separately and aggregates it at each level of the hierarchy.
+       This may cause non-negligible overhead for some workloads when under
+       deep level of the hierarchy, in which case this control attribute can
+       be used to disable PSI accounting in the cgroups.

s/in the cgroups/in the non-leaf cgroups/
or
s/in the cgroups/in the uninteresting cgroups/

(I'm concerned that it may result in lots of disabling if you want the
performance. I'll expand on it in 2nd subthread.)

Michal