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From: Peter Zijlstra <peterz@infradead.org>
To: Tejun Heo <tj@kernel.org>
Cc: lizefan@huawei.com, hannes@cmpxchg.org, mingo@redhat.com,
	pjt@google.com, luto@amacapital.net, efault@gmx.de,
	cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
	kernel-team@fb.com, lvenanci@redhat.com,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCHSET for-4.11] cgroup: implement cgroup v2 thread mode
Date: Wed, 22 Mar 2017 15:52:25 +0100	[thread overview]
Message-ID: <20170322145225.nsmnvknla752e6yx@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20170321123958.af7mcvcovexxzahu@hirez.programming.kicks-ass.net>

On Tue, Mar 21, 2017 at 01:39:58PM +0100, Peter Zijlstra wrote:
> 
> And yes, having to consider views is new and a direct consequence of
> this new optional feature. But I don't see how its a problem.
> 

So aside from having (RO) links in thread groups for system controllers,
we could also have a ${controller}_parent link back to whatever group is
the actual parent for that specific controller's view.

So then your B's memcg_parent would point to A, not T.

But I feel this is all superfluous window dressing; but if you want to
clarify the filesystem interface, this could be something to consider.

  reply	other threads:[~2017-03-22 14:52 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-02 20:06 [PATCHSET for-4.11] cgroup: implement cgroup v2 thread mode Tejun Heo
2017-02-02 20:06 ` [PATCH 1/5] cgroup: reorganize cgroup.procs / task write path Tejun Heo
2017-02-02 20:06 ` [PATCH 2/5] cgroup: add @flags to css_task_iter_start() and implement CSS_TASK_ITER_PROCS Tejun Heo
2017-02-02 20:06 ` [PATCH 3/5] cgroup: introduce cgroup->proc_cgrp and threaded css_set handling Tejun Heo
2017-02-02 20:06 ` [PATCH 4/5] cgroup: implement CSS_TASK_ITER_THREADED Tejun Heo
2017-02-02 20:06 ` [PATCH 5/5] cgroup: implement cgroup v2 thread support Tejun Heo
2017-02-02 21:32 ` [PATCHSET for-4.11] cgroup: implement cgroup v2 thread mode Andy Lutomirski
2017-02-02 21:52   ` Tejun Heo
2017-02-03 21:10     ` Andy Lutomirski
2017-02-03 21:56       ` Tejun Heo
2017-02-06  9:50     ` Peter Zijlstra
2017-02-03 20:20 ` Peter Zijlstra
2017-02-03 20:59   ` Tejun Heo
2017-02-06 12:49     ` Peter Zijlstra
2017-02-08 23:08       ` Tejun Heo
2017-02-09 10:29         ` Peter Zijlstra
2017-02-10 15:45           ` Tejun Heo
2017-02-10 17:51             ` Peter Zijlstra
2017-02-12  5:05               ` Tejun Heo
2017-02-12  6:59                 ` Mike Galbraith
2017-02-13  5:45                   ` Mike Galbraith
2017-03-13 19:26                     ` Tejun Heo
2017-03-14 14:45                       ` Mike Galbraith
2017-02-14 10:35                 ` Peter Zijlstra
2017-03-13 20:05                   ` Tejun Heo
2017-03-21 12:39                     ` Peter Zijlstra
2017-03-22 14:52                       ` Peter Zijlstra [this message]
2017-02-09 13:07 ` Paul Turner
2017-02-09 14:47   ` Peter Zijlstra
2017-02-09 15:08     ` Mike Galbraith
     [not found]     ` <CAPM31RJaJjFwenC36Abij+EdzO3KBm-DEjQ_crSmzrtrrn2N2A@mail.gmail.com>
2017-02-13  5:28       ` Mike Galbraith
2017-02-10 15:46   ` Tejun Heo

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