linux-kernel - Re: [PATCH 0/2] resource control file system

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Date:	Wed, 07 Mar 2007 14:13:46 -0800
From:	Dave Hansen <hansendc@...ibm.com>
To:	"Serge E. Hallyn" <serue@...ibm.com>
Cc:	Paul Menage <menage@...gle.com>, ckrm-tech@...ts.sourceforge.net,
	linux-kernel@...r.kernel.org, xemul@...ru, pj@....com,
	ebiederm@...ssion.com, winget@...gle.com,
	containers@...ts.osdl.org, akpm@...ux-foundation.org
Subject: Re: [PATCH 0/2] resource control file system - aka containers on
	top of nsproxy!

On Wed, 2007-03-07 at 15:59 -0600, Serge E. Hallyn wrote:
> Space saving was the only reason for nsproxy to exist.
> 
> Now of course it also provides the teensiest reduction in # instructions
> since every clone results in just one reference count inc for the
> nsproxy rather than one for each namespace. 

If we have 7 or 8 namespaces, then it can save us a significant number
of atomic instructions on _each_ of the refcounts, plus touching all of
the cachelines, etc...

-- Dave

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