From: Erich Focht <efocht@hpce.nec.com>
To: lse-tech@lists.sourceforge.net, colpatch@us.ibm.com
Cc: Paul Jackson <pj@sgi.com>, "Martin J. Bligh" <mbligh@aracnet.com>,
Andrew Morton <akpm@osdl.org>,
ckrm-tech@lists.sourceforge.net,
Nick Piggin <nickpiggin@yahoo.com.au>,
LKML <linux-kernel@vger.kernel.org>,
simon.derr@bull.net, frankeh@watson.ibm.com
Subject: Re: [Lse-tech] [RFC PATCH] scheduler: Dynamic sched_domains
Date: Fri, 8 Oct 2004 12:14:20 +0200 [thread overview]
Message-ID: <200410081214.20907.efocht@hpce.nec.com> (raw)
In-Reply-To: <1097110266.4907.187.camel@arrakis>
Hi Matthew,
On Thursday 07 October 2004 02:51, Matthew Dobson wrote:
> 1) Rip out sched_groups and move them into the sched_domains.
> 2) Add some reference counting, and eventually locking, to
> sched_domains.
> 3) Rewrite & simplify the way sched_domains are built and linked into a
> cohesive tree.
>
> This should allow us to support hotplug more easily, simply removing the
> domain belonging to the going-away CPU, rather than throwing away the
> whole domain tree and rebuilding from scratch. This should also allow
> us to support multiple, independent (ie: no shared root) domain trees
> which will facilitate isolated CPU groups and exclusive domains. I also
> hope this will allow us to leverage the existing topology infrastructure
> to build domains that closely resemble the physical structure of the
> machine automagically, thus making supporting interesting NUMA machines
> and SMT machines easier.
more flexibility in building the sched_domains is badly needed, so
your effort towards providing this is the right step. I'm not sure
yet whether your big change is really (and already) a simplification,
but what you described sounded for me like getting the chance to
configure the sched_domains at runtime, dynamically, from user
space. I didn't notice any user interface in your patch, or overlooked
it. Could you please describe the API you had in mind for that?
Regards,
Erich
next prev parent reply other threads:[~2004-10-08 10:16 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-07 0:51 [RFC PATCH] scheduler: Dynamic sched_domains Matthew Dobson
2004-10-07 2:13 ` Nick Piggin
2004-10-07 17:01 ` Jesse Barnes
2004-10-08 5:55 ` [Lse-tech] " Takayoshi Kochi
2004-10-08 6:08 ` Nick Piggin
2004-10-08 16:43 ` Jesse Barnes
2004-10-07 21:58 ` Matthew Dobson
2004-10-08 0:22 ` Nick Piggin
2004-10-07 22:20 ` Matthew Dobson
2004-10-07 4:12 ` [ckrm-tech] " Marc E. Fiuczynski
2004-10-07 5:35 ` Paul Jackson
2004-10-07 22:06 ` Matthew Dobson
2004-10-07 9:32 ` Paul Jackson
2004-10-08 10:14 ` Erich Focht [this message]
2004-10-08 10:40 ` [Lse-tech] " Nick Piggin
2004-10-08 15:50 ` [ckrm-tech] " Hubertus Franke
2004-10-08 22:48 ` Matthew Dobson
2004-10-08 18:54 ` Matthew Dobson
2004-10-08 21:56 ` Peter Williams
2004-10-08 22:52 ` Matthew Dobson
2004-10-08 23:13 ` Erich Focht
2004-10-08 23:50 ` Nick Piggin
2004-10-10 12:25 ` Erich Focht
2004-10-08 22:51 ` Erich Focht
2004-10-09 1:05 ` Matthew Dobson
2004-10-10 12:45 ` Erich Focht
2004-10-12 22:45 ` Matthew Dobson
2004-10-08 18:45 ` Matthew Dobson
2005-04-18 20:26 ` [RFC PATCH] Dynamic sched domains aka Isolated cpusets Dinakar Guniguntala
2005-04-18 23:44 ` Nick Piggin
2005-04-19 8:00 ` Dinakar Guniguntala
2005-04-19 5:54 ` Paul Jackson
2005-04-19 6:19 ` Nick Piggin
2005-04-19 6:59 ` Paul Jackson
2005-04-19 7:09 ` Nick Piggin
2005-04-19 7:25 ` Paul Jackson
2005-04-19 7:28 ` Paul Jackson
2005-04-19 7:19 ` Paul Jackson
2005-04-19 7:57 ` Nick Piggin
2005-04-19 20:34 ` Paul Jackson
2005-04-23 23:26 ` Paul Jackson
2005-04-26 0:52 ` Matthew Dobson
2005-04-26 0:59 ` Paul Jackson
2005-04-19 9:52 ` Dinakar Guniguntala
2005-04-19 15:26 ` Paul Jackson
2005-04-20 7:37 ` Dinakar Guniguntala
2005-04-19 20:42 ` Paul Jackson
2005-04-19 8:12 ` Simon Derr
2005-04-19 16:19 ` Paul Jackson
2005-04-19 9:34 ` [Lse-tech] " Dinakar Guniguntala
2005-04-19 17:23 ` Paul Jackson
2005-04-20 7:16 ` Dinakar Guniguntala
2005-04-20 19:09 ` Paul Jackson
2005-04-21 16:27 ` Dinakar Guniguntala
2005-04-22 21:26 ` Paul Jackson
2005-04-23 7:24 ` Dinakar Guniguntala
2005-04-23 22:30 ` Paul Jackson
2005-04-25 11:53 ` Dinakar Guniguntala
2005-04-25 14:38 ` Paul Jackson
2005-04-21 17:31 ` [RFC PATCH] Dynamic sched domains aka Isolated cpusets (v0.2) Dinakar Guniguntala
2005-04-22 18:50 ` Paul Jackson
2005-04-22 21:37 ` Paul Jackson
2005-04-23 3:11 ` Paul Jackson
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