linux-kernel - Re: [ckrm-tech] [PATCH 7/7] containers (V7): Container interface to nsproxy subsystem

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Message-ID: <20070403171155.GK2456@in.ibm.com>
Date:	Tue, 3 Apr 2007 22:41:55 +0530
From:	Srivatsa Vaddagiri <vatsa@...ibm.com>
To:	"Paul Menage" <menage@...gle.com>
Cc:	sekharan@...ibm.com, ckrm-tech@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, xemul@...ru, dev@...ru,
	rohitseth@...gle.com, pj@....com,
	"Eric W. Biederman" <ebiederm@...ssion.com>, mbligh@...gle.com,
	winget@...gle.com, containers@...ts.osdl.org,
	"Serge E. Hallyn" <serue@...ibm.com>, devel@...nvz.org
Subject: Re: [ckrm-tech] [PATCH 7/7] containers (V7): Container interface to nsproxy subsystem

On Tue, Apr 03, 2007 at 09:52:35AM -0700, Paul Menage wrote:
> I'm not saying "let's use nsproxy" - I'm not yet convinced that the
> lifetime/mutation/correlation rate of a pointer in an nsproxy is
> likely to be the same as for a container subsystem; if not, then
> reusing nsproxy could actually increase space overheads (since you'd
> end up with more, larger nsproxy objects, compared to smaller numbers
> of smaller nsproxy objects and smaller numbers of smaller
> container_group objects), even though it saved (just) one pointer per
> task_struct.

Even if nsproxy objects are made larger a bit, the number of such object will
be -much- lesser compared to number of task_structs I would think, so
the win/lose in space savings would need to take that into account.


-- 
Regards,
vatsa
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