From: Tejun Heo <tj@kernel.org>
To: Waiman Long <longman@redhat.com>
Cc: Li Zefan <lizefan@huawei.com>,
Johannes Weiner <hannes@cmpxchg.org>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
cgroups@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-doc@vger.kernel.org, linux-mm@kvack.org,
kernel-team@fb.com, pjt@google.com, luto@amacapital.net,
efault@gmx.de
Subject: Re: [RFC PATCH v2 08/17] cgroup: Move debug cgroup to its own file
Date: Fri, 19 May 2017 16:28:09 -0400 [thread overview]
Message-ID: <20170519202809.GB15279@wtj.duckdns.org> (raw)
In-Reply-To: <8d942ee6-ebf4-5ba5-5484-60762808f544@redhat.com>
Hello,
On Fri, May 19, 2017 at 03:33:14PM -0400, Waiman Long wrote:
> On 05/19/2017 03:21 PM, Tejun Heo wrote:
> > Yeah but it also shows up as an integral part of stable interface
> > rather than e.g. /sys/kernel/debug. This isn't of any interest to
> > people who aren't developing cgroup core code. There is no reason to
> > risk growing dependencies on it.
>
> The debug controller is used to show information relevant to the cgroup
> its css'es are attached to. So it will be very hard to use if we
> relocate to /sys/kernel/debug, for example. Currently, nothing in the
> debug controller other than debug_cgrp_subsys are exported. I don't see
> any risk of having dependency on that controller from other parts of the
> kernel.
Oh, sure, I wasn't suggesting moving it under /sys/kernel/debug but
that we'd want to take extra precautions as we can't.
Thanks.
--
tejun
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next prev parent reply other threads:[~2017-05-19 20:28 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-05-15 13:33 [RFC PATCH v2 00/17] cgroup: Major changes to cgroup v2 core Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 01/17] cgroup: reorganize cgroup.procs / task write path Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 02/17] cgroup: add @flags to css_task_iter_start() and implement CSS_TASK_ITER_PROCS Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 03/17] cgroup: introduce cgroup->proc_cgrp and threaded css_set handling Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 04/17] cgroup: implement CSS_TASK_ITER_THREADED Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 05/17] cgroup: implement cgroup v2 thread support Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 06/17] cgroup: Fix reference counting bug in cgroup_procs_write() Waiman Long
2017-05-17 19:20 ` Tejun Heo
2017-05-15 13:34 ` [RFC PATCH v2 07/17] cgroup: Prevent kill_css() from being called more than once Waiman Long
2017-05-17 19:23 ` Tejun Heo
2017-05-17 20:24 ` Waiman Long
2017-05-17 21:34 ` Tejun Heo
2017-05-15 13:34 ` [RFC PATCH v2 08/17] cgroup: Move debug cgroup to its own file Waiman Long
2017-05-17 21:36 ` Tejun Heo
2017-05-18 15:29 ` Waiman Long
2017-05-18 15:52 ` Waiman Long
2017-05-19 19:21 ` Tejun Heo
2017-05-19 19:33 ` Waiman Long
2017-05-19 20:28 ` Tejun Heo [this message]
2017-05-15 13:34 ` [RFC PATCH v2 09/17] cgroup: Keep accurate count of tasks in each css_set Waiman Long
2017-05-17 21:40 ` Tejun Heo
2017-05-18 15:56 ` Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 10/17] cgroup: Make debug cgroup support v2 and thread mode Waiman Long
2017-05-17 21:43 ` Tejun Heo
2017-05-18 15:58 ` Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 11/17] cgroup: Implement new thread mode semantics Waiman Long
2017-05-17 21:47 ` Tejun Heo
2017-05-18 17:21 ` Waiman Long
2017-05-19 20:26 ` Tejun Heo
2017-05-19 20:58 ` Tejun Heo
2017-05-22 17:13 ` Waiman Long
2017-05-22 17:32 ` Waiman Long
2017-05-24 20:36 ` Tejun Heo
2017-05-24 21:17 ` Waiman Long
2017-05-24 21:27 ` Tejun Heo
2017-06-01 14:50 ` Tejun Heo
2017-06-01 15:10 ` Peter Zijlstra
2017-06-01 15:35 ` Tejun Heo
2017-06-01 18:44 ` Waiman Long
2017-06-01 18:47 ` Tejun Heo
2017-06-01 19:27 ` Waiman Long
2017-06-01 20:38 ` Tejun Heo
2017-06-01 20:48 ` Waiman Long
2017-06-01 20:52 ` Tejun Heo
2017-06-01 21:12 ` Waiman Long
2017-06-01 21:18 ` Tejun Heo
2017-06-02 20:36 ` Waiman Long
2017-06-03 10:33 ` Tejun Heo
2017-06-01 19:55 ` Waiman Long
2017-06-01 20:15 ` Waiman Long
2017-06-01 18:41 ` Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 12/17] cgroup: Remove cgroup v2 no internal process constraint Waiman Long
2017-05-19 20:38 ` Tejun Heo
2017-05-20 2:10 ` Mike Galbraith
2017-05-24 17:01 ` Tejun Heo
2017-05-22 16:56 ` Waiman Long
2017-05-24 17:05 ` Tejun Heo
2017-05-24 18:09 ` Waiman Long
2017-05-24 18:19 ` Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 13/17] cgroup: Allow fine-grained controllers control in cgroup v2 Waiman Long
2017-05-19 20:55 ` Tejun Heo
2017-05-19 21:20 ` Waiman Long
2017-05-24 17:31 ` Tejun Heo
2017-05-24 17:49 ` Waiman Long
2017-05-24 17:56 ` Tejun Heo
2017-05-24 18:17 ` Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 14/17] cgroup: Enable printing of v2 controllers' cgroup hierarchy Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 15/17] sched: Misc preps for cgroup unified hierarchy interface Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 16/17] sched: Implement interface for cgroup unified hierarchy Waiman Long
2017-05-15 13:34 ` [RFC PATCH v2 17/17] sched: Make cpu/cpuacct threaded controllers Waiman Long
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