On Tue, May 10, 2022 at 7:19 PM CGEL <cgel.zte@xxxxxxxxx> wrote: > [...] > > > > > > > > All controls in cgroup v2 should be hierarchical. This is really > > > > required for a proper delegation semantic. > > > > > > > > > > Could we align to the semantic of /sys/fs/cgroup/memory.swappiness? > > > Some distributions like Ubuntu is still using cgroup v1. > > > > Other than enable flag, how would you handle the defrag flag > > hierarchically? It is much more complicated. > > Refer to memory.swappiness for cgroup, this new interface better be independent. Let me give my 0.02. I buy the use-case of Admin restricting THPs to low priority jobs but I don't think memory controller is the right place to enforce that policy. Michal gave one way (prctl()) to enforce that policy. Have you explored the BPF way to enforce this policy?
