linux-kernel - Re: [RFC] cpuset update_cgroup_cpus

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Message-Id: <20071015222017.6e9e95a6.pj@sgi.com>
Date:	Mon, 15 Oct 2007 22:20:17 -0700
From:	Paul Jackson <pj@....com>
To:	"Paul Menage" <menage@...gle.com>
Cc:	rientjes@...gle.com, nickpiggin@...oo.com.au,
	a.p.zijlstra@...llo.nl, balbir@...ux.vnet.ibm.com,
	linux-kernel@...r.kernel.org, clg@...ibm.com,
	ebiederm@...ssion.com, containers@...ts.osdl.org, serue@...ibm.com,
	svaidy@...ux.vnet.ibm.com, akpm@...ux-foundation.org,
	xemul@...nvz.org
Subject: Re: [RFC] cpuset update_cgroup_cpus_allowed

> Will do - I justed wanted to get this quickly out to show the idea
> that I was working on.

Ok - good.

In the final analysis, I'll take whatever works ;).

I'll lobby for keeping the code "simple" (a subjective metric) and poke
what holes I can in things, and propose what alternatives I can muster.

But so long as setting a cpusets 'cpus' in 2.6.24 leads, whether by my
historical "rewrite the pid to its own 'tasks' file" hack, or by a
proper solution such as you have advocated, or by some other scheme
or hack, to updating the cpus_allowed of each task in that cpuset, then
I'm ok.

Right now, that goal is not met, with the cgroup patches lined up in
*-mm for what will become 2.6.24.

We're getting short of time to fix this.

-- 
                  I won't rest till it's the best ...
                  Programmer, Linux Scalability
                  Paul Jackson <pj@....com> 1.925.600.0401
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