From: Mike Galbraith <umgwanakikbuti-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
To: Tejun Heo <tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
Cc: Paul Turner <pjt-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org>,
Peter Zijlstra <peterz-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org>,
Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Johannes Weiner <hannes-druUgvl0LCNAfugRpC6u6w@public.gmane.org>,
lizefan-hv44wF8Li93QT0dZR+AlfA@public.gmane.org,
cgroups <cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
LKML <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
kernel-team <kernel-team-b10kYP2dOMg@public.gmane.org>,
Linus Torvalds
<torvalds-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>,
Andrew Morton
<akpm-de/tnXTf+JLsfHDXvbKv3WD2FQJk+8+b@public.gmane.org>
Subject: Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy
Date: Wed, 19 Aug 2015 05:23:40 +0200 [thread overview]
Message-ID: <1439954620.3479.30.camel@gmail.com> (raw)
In-Reply-To: <20150818203117.GC15739-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
On Tue, 2015-08-18 at 13:31 -0700, Tejun Heo wrote:
> So, this is a trade-off we're consciously making. If there are
> common-enough use cases which require jumping across different cgroup
> domains, we'll try to figure out a way to accomodate those but by
> default migration is a very cold and expensive path.
Hm. I know of a big data outfit to which attach/detach performance was
important enough for them to have plucked an old experimental overhead
reduction hack (mine) off lkml, and shipped it. It must have mattered a
LOT for them (not suicidal crash test dummies) to have done that.
-Mike
WARNING: multiple messages have this Message-ID (diff)
From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Tejun Heo <tj@kernel.org>
Cc: Paul Turner <pjt@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Johannes Weiner <hannes@cmpxchg.org>,
lizefan@huawei.com, cgroups <cgroups@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
kernel-team <kernel-team@fb.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>
Subject: Re: [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy
Date: Wed, 19 Aug 2015 05:23:40 +0200 [thread overview]
Message-ID: <1439954620.3479.30.camel@gmail.com> (raw)
In-Reply-To: <20150818203117.GC15739@mtj.duckdns.org>
On Tue, 2015-08-18 at 13:31 -0700, Tejun Heo wrote:
> So, this is a trade-off we're consciously making. If there are
> common-enough use cases which require jumping across different cgroup
> domains, we'll try to figure out a way to accomodate those but by
> default migration is a very cold and expensive path.
Hm. I know of a big data outfit to which attach/detach performance was
important enough for them to have plucked an old experimental overhead
reduction hack (mine) off lkml, and shipped it. It must have mattered a
LOT for them (not suicidal crash test dummies) to have done that.
-Mike
next prev parent reply other threads:[~2015-08-19 3:23 UTC|newest]
Thread overview: 150+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-08-03 22:41 [PATCHSET sched,cgroup] sched: Implement interface for cgroup unified hierarchy Tejun Heo
2015-08-03 22:41 ` Tejun Heo
2015-08-03 22:41 ` [PATCH 1/3] cgroup: define controller file conventions Tejun Heo
[not found] ` <1438641689-14655-2-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-08-04 8:42 ` Peter Zijlstra
2015-08-04 8:42 ` Peter Zijlstra
[not found] ` <20150804084257.GJ25159-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2015-08-04 14:51 ` Tejun Heo
2015-08-04 14:51 ` Tejun Heo
2015-08-04 19:31 ` [PATCH v2 " Tejun Heo
2015-08-04 19:31 ` Tejun Heo
[not found] ` <20150804193101.GI17598-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-08-05 0:39 ` Kamezawa Hiroyuki
2015-08-05 0:39 ` Kamezawa Hiroyuki
2015-08-05 7:47 ` Michal Hocko
2015-08-06 2:30 ` Kamezawa Hiroyuki
[not found] ` <55C2C6B0.3080203-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2015-08-07 18:17 ` Michal Hocko
2015-08-07 18:17 ` Michal Hocko
2015-08-17 22:04 ` Johannes Weiner
2015-08-17 21:34 ` Johannes Weiner
2015-08-17 21:34 ` Johannes Weiner
2015-08-04 8:48 ` [PATCH " Peter Zijlstra
2015-08-04 14:53 ` Tejun Heo
2015-08-03 22:41 ` [PATCH 2/3] sched: Misc preps for cgroup unified hierarchy interface Tejun Heo
2015-08-03 22:41 ` [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Tejun Heo
2015-08-04 9:07 ` Peter Zijlstra
2015-08-04 15:10 ` Tejun Heo
[not found] ` <20150804151017.GD17598-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-08-05 9:10 ` Peter Zijlstra
2015-08-05 9:10 ` Peter Zijlstra
[not found] ` <20150805091036.GT25159-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2015-08-05 14:31 ` Tejun Heo
2015-08-05 14:31 ` Tejun Heo
[not found] ` <20150805143132.GK17598-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-08-17 20:35 ` Tejun Heo
2015-08-17 20:35 ` Tejun Heo
[not found] ` <CAPM31RJTf0v=2v90kN6-HM9xUGab_k++upO0Ym=irmfO9+BbFw@mail.gmail.com>
2015-08-18 4:03 ` Paul Turner
2015-08-18 20:31 ` Tejun Heo
2015-08-18 20:31 ` Tejun Heo
2015-08-18 23:39 ` Kamezawa Hiroyuki
2015-08-19 16:23 ` Tejun Heo
[not found] ` <20150818203117.GC15739-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-08-19 3:23 ` Mike Galbraith [this message]
2015-08-19 3:23 ` Mike Galbraith
[not found] ` <1439954620.3479.30.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-08-19 16:41 ` Tejun Heo
2015-08-19 16:41 ` Tejun Heo
2015-08-20 4:00 ` Mike Galbraith
[not found] ` <1440043259.3515.84.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-08-20 7:52 ` Tejun Heo
2015-08-20 7:52 ` Tejun Heo
[not found] ` <20150820075232.GA27917-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-08-20 8:47 ` Mike Galbraith
2015-08-20 8:47 ` Mike Galbraith
2015-08-21 19:26 ` Paul Turner
2015-08-21 19:26 ` Paul Turner
2015-08-22 18:29 ` Tejun Heo
[not found] ` <20150822182916.GE20768-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-08-24 15:47 ` Austin S Hemmelgarn
2015-08-24 15:47 ` Austin S Hemmelgarn
2015-08-24 17:04 ` Tejun Heo
[not found] ` <20150824170427.GA27262-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-08-24 19:18 ` Mike Galbraith
2015-08-24 19:18 ` Mike Galbraith
2015-08-24 20:00 ` Austin S Hemmelgarn
2015-08-24 20:00 ` Austin S Hemmelgarn
[not found] ` <55DB77F1.5080802-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-08-24 20:25 ` Tejun Heo
2015-08-24 20:25 ` Tejun Heo
2015-08-24 21:00 ` Paul Turner
[not found] ` <CAPM31R+ckFO5vNG4L5+h-yokFaZQz6kHe5a+pkRCfbL0H+NjXg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-08-24 21:12 ` Tejun Heo
2015-08-24 21:12 ` Tejun Heo
[not found] ` <20150824211238.GI28944-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-08-24 21:15 ` Paul Turner
2015-08-24 21:15 ` Paul Turner
2015-08-24 20:54 ` Paul Turner
2015-08-24 20:54 ` Paul Turner
[not found] ` <CAPM31RJi07qs42YsH=4JQSbZ+J-zCLv8e7yELb3tF_qAZmLqRA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-08-24 21:02 ` Tejun Heo
2015-08-24 21:02 ` Tejun Heo
2015-08-24 21:10 ` Paul Turner
[not found] ` <CAPM31R+i7BD8x9h_6wZVTa0zCB7XP0SGL5dSA-n6h9PTeAEhug-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-08-24 21:17 ` Tejun Heo
2015-08-24 21:17 ` Tejun Heo
[not found] ` <20150824211707.GJ28944-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-08-24 21:19 ` Paul Turner
2015-08-24 21:19 ` Paul Turner
[not found] ` <CAPM31R+vt1oAPCB-q6570RqZtJVBu5MH=gcQD2m9mjauStV7MA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-08-24 21:40 ` Tejun Heo
2015-08-24 21:40 ` Tejun Heo
2015-08-24 22:03 ` Paul Turner
[not found] ` <CAPM31R+Mnk=AL6h05eMMQvPEEfnjkB3iGb+oZj28jAQ9-ajOxA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-08-24 22:49 ` Tejun Heo
2015-08-24 22:49 ` Tejun Heo
[not found] ` <20150824224936.GO28944-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-08-24 23:15 ` Paul Turner
2015-08-24 23:15 ` Paul Turner
2015-08-25 2:36 ` Kamezawa Hiroyuki
2015-08-25 2:36 ` Kamezawa Hiroyuki
[not found] ` <55DBD4A9.7080603-+CUm20s59erQFUHtdCDX3A@public.gmane.org>
2015-08-25 21:13 ` Tejun Heo
2015-08-25 21:13 ` Tejun Heo
2015-08-25 9:24 ` Ingo Molnar
[not found] ` <20150825092441.GA24131-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-08-25 10:00 ` Peter Zijlstra
2015-08-25 10:00 ` Peter Zijlstra
2015-08-25 19:18 ` Tejun Heo
2015-08-25 19:18 ` Tejun Heo
2015-08-24 20:52 ` Paul Turner
2015-08-24 21:36 ` Tejun Heo
2015-08-24 21:58 ` Paul Turner
[not found] ` <CAPM31RKCO-yxtVf+iUs8FOqk6uGSyixEXtx9zSzxQ1uOGtkDqQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-08-24 22:19 ` Tejun Heo
2015-08-24 22:19 ` Tejun Heo
[not found] ` <20150824221935.GN28944-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-08-24 23:06 ` Paul Turner
2015-08-24 23:06 ` Paul Turner
[not found] ` <CAPM31RK08pC3g9qx+TEw6PQvtHk8idKE3OALQN8cFr_QOuT3FA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-08-25 21:02 ` Tejun Heo
2015-08-25 21:02 ` Tejun Heo
[not found] ` <20150825210234.GE26785-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-09-02 17:03 ` Tejun Heo
2015-09-02 17:03 ` Tejun Heo
2015-09-09 12:49 ` Paul Turner
2015-09-09 12:49 ` Paul Turner
[not found] ` <CAPM31RJvrPL7S37=yhxMA5OGUFNUfPurTZ21nfH6eFRb15ZGtw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-09-12 14:40 ` Tejun Heo
2015-09-12 14:40 ` Tejun Heo
[not found] ` <20150912144007.GA8942-piEFEHQLUPpN0TnZuCh8vA@public.gmane.org>
2015-09-17 14:35 ` Peter Zijlstra
2015-09-17 14:35 ` Peter Zijlstra
[not found] ` <20150917143527.GJ3604-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2015-09-17 14:53 ` Tejun Heo
2015-09-17 14:53 ` Tejun Heo
2015-09-17 15:42 ` Peter Zijlstra
2015-09-17 15:10 ` Peter Zijlstra
2015-09-17 15:10 ` Peter Zijlstra
[not found] ` <20150917151049.GB11639-ndre7Fmf5hadTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2015-09-17 15:52 ` Tejun Heo
2015-09-17 15:52 ` Tejun Heo
[not found] ` <20150917155245.GF7205-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-09-17 15:53 ` Peter Zijlstra
2015-09-17 15:53 ` Peter Zijlstra
2015-09-17 23:29 ` Tejun Heo
2015-09-17 23:29 ` Tejun Heo
2015-09-18 11:27 ` Paul Turner
2015-09-18 11:27 ` Paul Turner
[not found] ` <CAPM31RLAtuaDbE9+nvMvgMB8zaOpxVcriCyE9qqszNM3XXTo5Q-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-10-01 18:46 ` Tejun Heo
2015-10-01 18:46 ` Tejun Heo
2015-10-15 11:42 ` Paul Turner
[not found] ` <CAPM31RKx0vT-9VFN=XASYM4iv4U5ZGZW93XRtJd_7mOHwu76NA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-10-23 22:21 ` Tejun Heo
2015-10-23 22:21 ` Tejun Heo
2015-10-24 4:36 ` Mike Galbraith
2015-10-25 2:18 ` Tejun Heo
[not found] ` <20151025021829.GA15471-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-10-25 3:43 ` Mike Galbraith
2015-10-25 3:43 ` Mike Galbraith
[not found] ` <1445744613.3180.60.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-10-27 3:16 ` Tejun Heo
2015-10-27 3:16 ` Tejun Heo
[not found] ` <20151027031656.GA11962-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-10-27 5:42 ` Mike Galbraith
2015-10-27 5:42 ` Mike Galbraith
[not found] ` <1445924531.2909.79.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-10-27 5:46 ` Tejun Heo
2015-10-27 5:46 ` Tejun Heo
2015-10-27 5:56 ` Mike Galbraith
[not found] ` <1445925402.2909.86.camel-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-10-27 6:00 ` Tejun Heo
2015-10-27 6:00 ` Tejun Heo
[not found] ` <20151027060027.GA2888-qYNAdHglDFBN0TnZuCh8vA@public.gmane.org>
2015-10-27 6:08 ` Mike Galbraith
2015-10-27 6:08 ` Mike Galbraith
2015-10-25 3:54 ` Linus Torvalds
[not found] ` <CA+55aFzMdG5VPA0ZvoFANj-H-7LHeu=JUvvqPykF_w5Nd0pnSA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2015-10-25 9:33 ` Ingo Molnar
2015-10-25 9:33 ` Ingo Molnar
[not found] ` <20151025093331.GA4834-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2015-10-25 10:41 ` Theodore Ts'o
2015-10-25 10:41 ` Theodore Ts'o
2015-10-25 10:47 ` Florian Weimer
[not found] ` <562CB328.3090906-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2015-10-25 11:58 ` Theodore Ts'o
2015-10-25 11:58 ` Theodore Ts'o
2015-10-25 13:17 ` Florian Weimer
2015-10-25 13:40 ` Getrandom wrapper Theodore Ts'o
2015-10-26 13:32 ` Florian Weimer
2015-10-26 14:10 ` [PATCH 3/3] sched: Implement interface for cgroup unified hierarchy Peter Zijlstra
[not found] ` <1438641689-14655-4-git-send-email-tj-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>
2015-08-04 19:32 ` [PATCH v2 " Tejun Heo
2015-08-04 19:32 ` Tejun Heo
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