Date: Tue, 5 Oct 2004 19:47:02 -0700
From: Paul Jackson <pj@sgi.com>
To: colpatch@us.ibm.com
Cc: mbligh@aracnet.com, pwil3058@bigpond.net.au, frankeh@watson.ibm.com,
       dipankar@in.ibm.com, akpm@osdl.org, ckrm-tech@lists.sourceforge.net,
       efocht@hpce.nec.com, lse-tech@lists.sourceforge.net, hch@infradead.org,
       steiner@sgi.com, jbarnes@sgi.com, sylvain.jeaugey@bull.net, djh@sgi.com,
       linux-kernel@vger.kernel.org, Simon.Derr@bull.net, ak@suse.de,
       sivanich@sgi.com
Subject: Re: [Lse-tech] [PATCH] cpusets - big numa cpu and memory placement
Message-Id: <20041005194702.0644070b.pj@sgi.com>
In-Reply-To: <1097014749.4065.48.camel@arrakis>
References: <20040805100901.3740.99823.84118@sam.engr.sgi.com>
	<20040805190500.3c8fb361.pj@sgi.com>
	<247790000.1091762644@[10.10.2.4]>
	<200408061730.06175.efocht@hpce.nec.com>
	<20040806231013.2b6c44df.pj@sgi.com>
	<411685D6.5040405@watson.ibm.com>
	<20041001164118.45b75e17.akpm@osdl.org>
	<20041001230644.39b551af.pj@sgi.com>
	<20041002145521.GA8868@in.ibm.com>
	<415ED3E3.6050008@watson.ibm.com>
	<415F37F9.6060002@bigpond.net.au>
	<821020000.1096814205@[10.10.2.4]>
	<20041003083936.7c844ec3.pj@sgi.com>
	<834330000.1096847619@[10.10.2.4]>
	<1097014749.4065.48.camel@arrakis>
Organization: SGI
Mime-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1112
Lines: 27

Matthew wrote:
> 
> By adding locking and reference counting, and simplifying the way in which
> sched_domains are created, linked, unlinked and eventually destroyed we
> can use sched_domains as the implementation of cpusets.

I'd be inclined to turn this sideways from what you say.

Rather, add another couple of properties to cpusets:

 1) An isolated flag, that guarantees whatever isolation properties
    we agree that schedulers, allocators and resource allocators
    require between domains, and

 2) For those cpusets which are so isolated, the option to add
    links of some form, between that cpuset, and distinct scheduler,
    allocator and/or resource domains.

-- 
                          I won't rest till it's the best ...
                          Programmer, Linux Scalability
                          Paul Jackson <pj@sgi.com> 1.650.933.1373
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/