Re: [RFC] memcg: Add swappiness to cgroup2

[Michal Koutný]

On Thu, Dec 26, 2019 at 02:56:40PM +0800, teawater <teawaterz@xxxxxxxxxxxxxxxxx> wrote:
> For example, an application does a lot of file access work in a
> memory-constrained environment.
> [...]
> Both of them are extreme examples.
The examples are quite generic. Do cgroup v2 controls really prevent
handling such workloads appropriately?

Besides that, note that per-cgroup swappiness as used in v1 cannot be
simply transferred into v2 because, it's a concept that doesn't take
into account cgroup hierarchies (how would parent's swappiness affect
children? what would swappiness on inner nodes mean?).

HTH,
Michal

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