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

From Mike Galbraith <umgwanakikbuti@gmail.com>
Newsgroups linux.kernel
Subject Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource group and PRIO_RGRP
Date 2016-04-09 08:20 +0200
Message-ID <rlUpr-FX-3@gated-at.bofh.it> (permalink)
References (4 earlier) <rlcHL-pI-1@gated-at.bofh.it> <rldaN-RS-1@gated-at.bofh.it> <rlo6e-o4-17@gated-at.bofh.it> <rloIV-Ti-3@gated-at.bofh.it> <rlL2O-Ou-19@gated-at.bofh.it>
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On Fri, 2016-04-08 at 16:11 -0400, Tejun Heo wrote:

> > That's just plain broken... That is not how a proportional weight based
> > hierarchical controller works.
> 
> That's a strong statement.  When the hierarchy is composed of
> equivalent objects as in CPU, not distinguishing internal and leaf
> nodes would be a more natural way to organize; however...

You almost said it yourself, you want to make the natural organization
of cpu, cpuacct and cpuset controllers a prohibited organization. 
 There is no "however..." that can possibly justify that.  It's akin to
mandating: henceforth "horse" shall be spelled "cow", riders thereof
shall teach their "cow" the proper enunciation of "moo".  It's silly.

Like it or not, these controllers have thread encoded in their DNA,
it's an integral part of what they are, and how real users in the real
world use them.  No rationalization will change that cold hard fact.

Make an "Aunt Tilly" button for those incapable of comprehending the
complexities if you will, but please don't make cgroups so rigid and
idiot proof that only idiots (hi system thing) can use it.

	-Mike

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Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Tejun Heo <tj@kernel.org> - 2016-04-06 18:00 +0200
  Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Peter Zijlstra <peterz@infradead.org> - 2016-04-07 08:50 +0200
    Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Johannes Weiner <hannes@cmpxchg.org> - 2016-04-07 09:40 +0200
      Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Peter Zijlstra <peterz@infradead.org> - 2016-04-07 10:10 +0200
        Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Johannes Weiner <hannes@cmpxchg.org> - 2016-04-07 11:30 +0200
          Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Peter Zijlstra <peterz@infradead.org> - 2016-04-07 12:50 +0200
        Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Tejun Heo <tj@kernel.org> - 2016-04-07 21:50 +0200
          Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Peter Zijlstra <peterz@infradead.org> - 2016-04-07 22:30 +0200
            Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Tejun Heo <tj@kernel.org> - 2016-04-08 22:20 +0200
              Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-04-09 08:20 +0200
              Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Peter Zijlstra <peterz@infradead.org> - 2016-04-09 15:40 +0200
                Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Tejun Heo <tj@kernel.org> - 2016-04-13 00:30 +0200
                Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-04-13 09:50 +0200
                Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Tejun Heo <tj@kernel.org> - 2016-04-13 18:10 +0200
                Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-04-13 21:20 +0200
                Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-04-14 08:10 +0200
                Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Tejun Heo <tj@kernel.org> - 2016-04-14 22:00 +0200
                Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-04-15 04:50 +0200
              Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Peter Zijlstra <peterz@infradead.org> - 2016-04-09 18:10 +0200
      Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-04-07 10:10 +0200
      Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Peter Zijlstra <peterz@infradead.org> - 2016-04-07 10:30 +0200
        Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Johannes Weiner <hannes@cmpxchg.org> - 2016-04-07 21:10 +0200
          Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Peter Zijlstra <peterz@infradead.org> - 2016-04-07 21:40 +0200
            Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Johannes Weiner <hannes@cmpxchg.org> - 2016-04-07 22:30 +0200
              Re: [PATCHSET RFC cgroup/for-4.6] cgroup, sched: implement resource  group and PRIO_RGRP Mike Galbraith <umgwanakikbuti@gmail.com> - 2016-04-08 05:20 +0200

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