Re: [PATCH 2/4] cgroup: define controller file conventions

From: Johannes Weiner
Date: Mon Aug 03 2015 - 09:36:43 EST


On Sun, Aug 02, 2015 at 04:23:42PM -0400, Tejun Heo wrote:
> Traditionally, each cgroup controller implemented whatever interface
> it wanted leading to interfaces which are widely inconsistent.
> Examining the requirements of the controllers readily yield that there
> are only a few control schemes shared among all.
>
> Two major controllers already had to implement new interface for the
> unified hierarchy due to significant structural changes. Let's take
> the chance to establish common conventions throughout all controllers.
>
> This patch defines CGROUP_WEIGHT_MIN/DFL/MAX to be used on all weight
> based control knobs and documents the conventions that controllers
> should follow on the unified hierarchy. Except for io.weight knob,
> all existing unified hierarchy knobs are already compliant. A
> follow-up patch will update io.weight.
>
> Signed-off-by: Tejun Heo <tj@xxxxxxxxxx>
> Cc: Li Zefan <lizefan@xxxxxxxxxx>
> Cc: Johannes Weiner <hannes@xxxxxxxxxxx>

Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
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