linux-kernel - Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource group and PRIO

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Message-ID: <20160407193127.GB3448@twins.programming.kicks-ass.net>
Date:	Thu, 7 Apr 2016 21:31:27 +0200
From:	Peter Zijlstra <peterz@...radead.org>
To:	Johannes Weiner <hannes@...xchg.org>
Cc:	Tejun Heo <tj@...nel.org>, torvalds@...ux-foundation.org,
	akpm@...ux-foundation.org, mingo@...hat.com, lizefan@...wei.com,
	pjt@...gle.com, linux-kernel@...r.kernel.org,
	cgroups@...r.kernel.org, linux-api@...r.kernel.org,
	kernel-team@...com
Subject: Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource
 group and PRIO_RGRP

On Thu, Apr 07, 2016 at 03:04:24PM -0400, Johannes Weiner wrote:

> All this means here is that if you want to change the shares allocated
> to the tasks in R (or then L) you have to be explicit about it and
> update the weight configuration in L.

Updating the weight of L for every task spawned and killed is simply not
an option.

The fact that you're not willing to admit to this is troubling, but does
confirm I can stop spending time on anything cgroup v2. cpu-cgroup just
isn't going to move to this inferior interface.