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From: Dhaval Giani <dhaval.giani@gmail.com>
To: Paul Turner <pjt@google.com>
Cc: Tejun Heo <tj@kernel.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Glauber Costa <glommer@parallels.com>,
	linux-kernel@vger.kernel.org, cgroups@vger.kernel.org,
	linux-mm@kvack.org, davej@redhat.com, ben@decadent.org.uk,
	lennart@poettering.net, kay.sievers@vrfy.org,
	Frederic Weisbecker <fweisbec@gmail.com>,
	Balbir Singh <bsingharora@gmail.com>,
	Bharata B Rao <bharata@linux.vnet.ibm.com>
Subject: Re: [RFC 0/5] forced comounts for cgroups.
Date: Sat, 8 Sep 2012 09:36:29 -0400	[thread overview]
Message-ID: <CAPhKKr8f6q=6m4T=-6PA8za-nMQMKy1HykAX-2NRaL9AZoPSjw@mail.gmail.com> (raw)
In-Reply-To: <CAPM31RKVYpkc0oTJKjsdsvqBfif=Bovi3a6TE8qdOOpEYOC0Lw@mail.gmail.com>

On Thu, Sep 6, 2012 at 5:11 PM, Paul Turner <pjt@google.com> wrote:
> On Thu, Sep 6, 2012 at 1:46 PM, Tejun Heo <tj@kernel.org> wrote:
>> Hello,
>>
>> cc'ing Dhaval and Frederic.  They were interested in the subject
>> before and Dhaval was pretty vocal about cpuacct having a separate
>> hierarchy (or at least granularity).
>
> Really?  Time just has _not_ borne out this use-case.  I'll let Dhaval
> make a case for this but he should expect violent objection.
>

I am not objecting directly! I am aware of a few users who are (or at
least were) using cpu and cpuacct separately because they want to be
able to account without control. Having said that, there are tons of
flaws in the current approach, because the accounting without control
is just plain wrong. I have copied a few other folks who might be able
to shed light on those users and if we should still consider them.

[And the lesser number of controllers, the better it is!]

Thanks!
Dhaval

      parent reply	other threads:[~2012-09-08 13:36 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-04 14:18 Glauber Costa
2012-09-04 14:18 ` [RFC 1/5] cgroup: allow some comounts to be forced Glauber Costa
2012-09-04 14:18 ` [RFC 2/5] sched: adjust exec_clock to use it as cpu usage metric Glauber Costa
2012-09-04 14:18 ` [RFC 3/5] sched: do not call cpuacct_charge when cpu and cpuacct are comounted Glauber Costa
2012-09-04 14:18 ` [RFC 4/5] cpuacct: do not gather cpuacct statistics when not mounted Glauber Costa
2012-09-04 14:18 ` [RFC 5/5] sched: add cpusets to comounts list Glauber Costa
2012-09-04 21:46 ` [RFC 0/5] forced comounts for cgroups Tejun Heo
2012-09-05  8:03   ` Glauber Costa
2012-09-05  8:14     ` Tejun Heo
2012-09-05  8:17       ` Glauber Costa
2012-09-05  8:29         ` Tejun Heo
2012-09-05  8:35           ` Glauber Costa
2012-09-05  8:47             ` Tejun Heo
2012-09-05  8:55               ` Glauber Costa
2012-09-05  9:07                 ` Tejun Heo
2012-09-05  9:06                   ` Glauber Costa
2012-09-05  9:14                     ` Tejun Heo
2012-09-05  9:06               ` Peter Zijlstra
2012-09-05  9:07                 ` Peter Zijlstra
2012-09-05  9:22                   ` Tejun Heo
2012-09-05  9:11                 ` Tejun Heo
2012-09-05  9:12                   ` Glauber Costa
2012-09-05  9:19                     ` Tejun Heo
2012-09-05  9:30                       ` Glauber Costa
2012-09-05  9:26                     ` Peter Zijlstra
2012-09-05  9:31                       ` Glauber Costa
2012-09-05  9:45                         ` Tejun Heo
2012-09-05  9:48                           ` Glauber Costa
2012-09-05  9:56                             ` Tejun Heo
2012-09-05 10:20                         ` Peter Zijlstra
2012-09-06 20:38                           ` Tejun Heo
2012-09-06 22:39                             ` Glauber Costa
2012-09-06 22:45                               ` Tejun Heo
2012-09-05  9:32                 ` Tejun Heo
2012-09-05 10:04                   ` Peter Zijlstra
2012-09-06 20:46                     ` Tejun Heo
2012-09-06 21:11                       ` Paul Turner
2012-09-06 22:36                         ` Glauber Costa
2012-09-08 13:36                         ` Dhaval Giani [this message]

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