linux-kernel - Re: Improve init/Kconfig help descriptions [PATCH 3/9]

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Message-ID: <20080219151028.GA28294@tull.net>
Date:	Wed, 20 Feb 2008 02:10:28 +1100
From:	Nick Andrew <nick@...k-andrew.net>
To:	Pavel Emelyanov <xemul@...nvz.org>
Cc:	trivial@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: Improve init/Kconfig help descriptions [PATCH 3/9]

On Tue, Feb 19, 2008 at 05:42:07PM +0300, Pavel Emelyanov wrote:
> Nick Andrew wrote:
> > On Wed, Feb 20, 2008 at 01:06:09AM +1100, Nick Andrew wrote:
> >> Here is a series of 9 patches to init/Kconfig intended to improve the
> >> usefulness and consistency of the help descriptions. The patches are
> >> against linux-2.6.24.2.
> >> [...]
> >> Patch 3
> >> 	USER_NS
> >> 	PID_NS
> 
> What about UTS_NS, IPC_NS and NET_NS? 
> Their descriptions can be improved in the same way :)

So far I have edited only init/Kconfig, that's what these 9
patches are for. Next I'll do block/Kconfig. Eventually I expect
to get to net/Kconfig which is where NET_NS is configured,
but I don't know where UTS_NS and IPC_NS come from in 2.6.24.2.

I expect I'll have to start patching against a git tree soon,
to be sure to see the latest code. I assume this should be
Linus' tree?

Is there any actual documentation on user namespaces and friends?
I think I grasp the pid namespaces concept; I am having a little
difficulty visualising what function user namespaces performs.
"provide different user info" isn't a very useful description and
I'd fix it if I understood what it is supposed to mean.

To make a guess at it, how about:

   Enable support for user namespaces.

   This is a function used by container-based virtualisation systems
   (e.g. vservers). User namespaces ensures that processes with the
   same uid which are in different containers are isolated from each other.

   Answer Y if you require container-based virtualisation like
   vservers. If unsure, say N.

Nick.
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