linux-kernel - Re: [ckrm-tech] [PATCH 2/6] Cpusets hooked into containers

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Message-Id: <20061106130921.7ed66fa5.pj@sgi.com>
Date:	Mon, 6 Nov 2006 13:09:20 -0800
From:	Paul Jackson <pj@....com>
To:	"Paul Menage" <menage@...gle.com>
Cc:	balbir@...ibm.com, sekharan@...ibm.com,
	ckrm-tech@...ts.sourceforge.net, jlan@....com, Simon.Derr@...l.net,
	linux-kernel@...r.kernel.org, mbligh@...gle.com, winget@...gle.com,
	rohitseth@...gle.com
Subject: Re: [ckrm-tech] [PATCH 2/6] Cpusets hooked into containers

Paul M wrote:
>  It basically makes "cpuset" an alias for "container"
> in the relevant /proc directories if CONFIG_CPUSETS_LEGACY_API is
> defined.

Paul M - I never replied to your initial CONFIG_CPUSETS_LEGACY_API
patch proposal - sorry.

An aspect of this proposal never made sense to me, so I put it aside
and went on to other things.

It is important to me that the current cpuset API be maintained.  The
cpuset API seems to be working well, for a number of users.

Occassionally I will agree to subtle API changes (see another thread
concerning cpu_exclusive and sched_domain cpuset flags), but not
anything likely to break user code outright, except under duress.

But I presume this CONFIG_CPUSETS_LEGACY_API option means I either
get to build a kernel that supports the new container API, or a kernel
that supports the old cpuset API.  That does not seem useful to me.

We need to support both API's, at runtime, at the same time.  Not a choice
of API's at build time with a kernel CONFIG option.

Perhaps I am missing something ...

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