Re: [PATCH 2/2] mm: Consider subtrees in memory.events

Tejun Heo
2019-01-28T17:18:25Z

Hello, Shakeel.

On Mon, Jan 28, 2019 at 07:59:33AM -0800, Shakeel Butt wrote:
> Why not make this configurable at the delegation boundary? As you
> mentioned, there are jobs who want centralized workload manager to
> watch over their subtrees while there can be jobs which want to
> monitor their subtree themselves. For example I can have a job which
> know how to act when one of the children cgroup goes OOM. However if
> the root of that job goes OOM then the centralized workload manager
> should do something about it. With this change, how to implement this
> scenario? How will the central manager differentiates between that a
> subtree of a job goes OOM or the root of that job? I guess from the
> discussion it seems like the centralized manager has to traverse that
> job's subtree to find the source of OOM.
>
> Why can't we let the implementation of centralized manager easier by
> allowing to configure the propagation of these notifications across
> delegation boundary.

I think the right way to achieve the above would be having separate
recursive and local counters.

Thanks.

--
tejun