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Date: Wed, 22 Jan 2003 19:05:09 -0800
From: David Schultz <dschultz@uclink.Berkeley.EDU>
To: Peter Wemm <peter@wemm.org>
Cc: Garrett Wollman <wollman@lcs.mit.edu>,
	Matthew Dillon <dillon@apollo.backplane.com>, arch@FreeBSD.ORG
Subject: Re: getsysfd() patch #1 (Re: Virtual memory question)
Message-ID: <20030123030509.GA52151@HAL9000.homeunix.com>
Mail-Followup-To: Peter Wemm <peter@wemm.org>,
	Garrett Wollman <wollman@lcs.mit.edu>,
	Matthew Dillon <dillon@apollo.backplane.com>, arch@FreeBSD.ORG
References: <200301222323.h0MNN7co043532@khavrinen.lcs.mit.edu> <20030123022158.E5F5B2A7EA@canning.wemm.org>
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Thus spake Peter Wemm <peter@wemm.org>:
> Garrett Wollman wrote:
> 
> > >     I would argue that namespace private operations are far better handled
> > >     in userspace then kernelspace (why waste kernel memory managing
> > >     private namespaces?).
> > 
> > Private namespaces are bad and unnecessary.  We already have anonymous
> > shared memory; I don't see any need for ``semi-anonymous'' shared
> > memory.  The garbage-collection problem is already bad enough.
> 
> Meanwhile, in the real world, it is exactly what we need at work.
> Anonymous shared memory (MAP_ANON and /dev/zero) isn't good enough.

I suppose it's too late to argue that the L4 interface would be
sufficient to solve all these problems...

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