linux-kernel - RE: [RFC] transcendent memory for Linux

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Message-ID: <87cb4d6e-dbfe-497b-b651-9b912dc3fbc8@default>
Date:	Thu, 2 Jul 2009 07:03:46 -0700 (PDT)
From:	Dan Magenheimer <dan.magenheimer@...cle.com>
To:	Pavel Machek <pavel@....cz>, Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	linux-kernel@...r.kernel.org, xen-devel@...ts.xensource.com,
	npiggin@...e.de, chris.mason@...cle.com, kurt.hackel@...cle.com,
	dave.mccracken@...cle.com, Avi Kivity <avi@...hat.com>,
	Rik van Riel <riel@...hat.com>, alan@...rguk.ukuu.org.uk,
	Rusty Russell <rusty@...tcorp.com.au>,
	Martin Schwidefsky <schwidefsky@...ibm.com>, akpm@...l.org,
	Marcelo Tosatti <mtosatti@...hat.com>,
	Balbir Singh <balbir@...ux.vnet.ibm.com>,
	tmem-devel@....oracle.com, sunil.mushran@...cle.com,
	linux-mm@...ck.org, Himanshu Raj <rhim@...rosoft.com>,
	Keir Fraser <keir.fraser@...citrix.com>
Subject: RE: [RFC] transcendent memory for Linux

OK, OK, I give up.  I will ensure all code for shared pools
is removed from the next version of the patch.

Though for future reference, I am interested in what
problems it has other than "just" security (offlist
if you want).

> -----Original Message-----
> From: Pavel Machek [mailto:pavel@....cz]
> 
> > > Yeah, a shared namespace of accessible objects is an entirely 
> > > new thing
> > > in the Xen universe.  I would also drop Xen support until 
> > > there's a good
> > > security story about how they can be used.
> > 
> > While I agree that the security is not bulletproof, I wonder
> > if this position might be a bit extreme.  Certainly, the NSA
> > should not turn on tmem in a cluster, but that doesn't mean that
> > nobody should be allowed to.  I really suspect that there are
> 
> This has more problems than "just" security, and yes, security should
> be really solved at design time...
> 								
> 			Pavel
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