No problem, since cgroups v1 are frozen that is a valid stopper.
Let me check what could be done about PSI for swapless cases.

On Tue, Apr 14, 2020 at 6:55 PM Chris Down <chris@chrisdown.name> wrote:

> svc_lmoiseichuk@magicleap.com writes:
> >From: Leonid Moiseichuk <lmoiseichuk@magicleap.com>
> >
> >Populating memcg vmpressure controls with legacy defaults:
> >- memory.pressure_window (512 or SWAP_CLUSTER_MAX * 16)
> >- memory.pressure_level_critical_prio (3)
> >- memory.pressure_level_medium (60)
> >- memory.pressure_level_critical (95)
> >
> >Signed-off-by: Leonid Moiseichuk <lmoiseichuk@magicleap.com>
>
> I'm against this even in the abstract, cgroup v1 is deprecated and its
> interface frozen, and vmpressure is pretty much already supplanted by PSI,
> which actually works (whereas vmpressure often doesn't since it mostly
> ends up
> just measuring reclaim efficiency, rather than actual memory pressure).
>
> Without an extremely compelling reason to expose these, this just muddles
> the
> situation.
>


-- 
With Best Wishes,
Leonid