linux-kernel - Re: [PATCH 0/6] A config option to compile out some namespaces code (v4)

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Message-ID: <20071114145846.GC17106@sergelap.austin.ibm.com>
Date:	Wed, 14 Nov 2007 08:58:46 -0600
From:	"Serge E. Hallyn" <serue@...ibm.com>
To:	Pavel Emelyanov <xemul@...nvz.org>
Cc:	Andrew Morton <akpm@...l.org>, Cedric Le Goater <clg@...ibm.com>,
	Serge Hallyn <serue@...ibm.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linux Containers <containers@...ts.osdl.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 0/6] A config option to compile out some namespaces
	code (v4)

Quoting Pavel Emelyanov (xemul@...nvz.org):
> Change against v3: rebased on 2.6.24-rc2-mm1
> 
> There were some questions like "do I need this on my cellphone"
> in reply to different namespaces patches. Indeed, the namespaces
> are not useful for most of the embedded systems, but the code
> creating and releasing them weights a lot.
> 
> So I propose to add a config option which will help embedded
> people to reduce the vmlinux size. This option simply compiles
> out the namespaces cloning and releasing code *only*, but keeps
> all the other logic untouched (e.g. the notion of init_ns).
> 
> Moreover, some of the namespaces might be not 100% ready by
> the time of Linux-2.6.xxx release (like user namespaces or pid 
> namespaces are now). Since each namespace has its own option, 
> which depends on the NAMESPACES, it can be mrked with "depends
> on EXPERIMENTAL/BROKEN/ANYTHING_ELSE" not to release the
> functionality that is not 100% ready yet.
> 
> When someone tries to clone some namespace with their support
> turned off, he will receive an EINVAL error.
> 
> This patchset can save more than 2KB from the vmlinux when
> turning the config option "NAMESPACES" to "n".
> 
> Signed-off-by: Pavel Emelyanov <xemul@...nvz.org>

Pretty sure I did this a few versions ago, but

Acked-by: Serge Hallyn <serue@...ibm.com>

for the whole set.

thanks,
-serge
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