linux-kernel - Re: [PATCH v2 1/3] cgroup: define controller file conventions

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Date:	Mon, 17 Aug 2015 23:34:26 +0200
From:	Johannes Weiner <hannes@...xchg.org>
To:	Tejun Heo <tj@...nel.org>
Cc:	mingo@...hat.com, peterz@...radead.org, lizefan@...wei.com,
	cgroups@...r.kernel.org, linux-kernel@...r.kernel.org,
	kernel-team@...com
Subject: Re: [PATCH v2 1/3] cgroup: define controller file conventions

On Tue, Aug 04, 2015 at 03:31:01PM -0400, Tejun Heo wrote:
> From 6abc8ca19df0078de17dc38340db3002ed489ce7 Mon Sep 17 00:00:00 2001
> From: Tejun Heo <tj@...nel.org>
> Date: Tue, 4 Aug 2015 15:20:55 -0400
> 
> 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.
> 
> v2: Added descriptions of min, low and high knobs.
> 
> Signed-off-by: Tejun Heo <tj@...nel.org>
> Acked-by: Johannes Weiner <hannes@...xchg.org>
> Cc: Li Zefan <lizefan@...wei.com>
> Cc: Peter Zijlstra <peterz@...radead.org>

Acked-by: Johannes Weiner <hannes@...xchg.org>
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