linux-kernel - Re: [PATCH] Define CLONE

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Message-Id: <20070321133938.bff535a3.akpm@linux-foundation.org>
Date:	Wed, 21 Mar 2007 13:39:38 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	sukadev@...ibm.com
Cc:	linux-kernel@...r.kernel.org,
	"Eric W. Biederman" <ebiederm@...ssion.com>, serue@...ibm.com,
	haveblue@...ibm.com, Containers <containers@...ts.osdl.org>,
	clg@...ibm.com
Subject: Re: [PATCH] Define CLONE_NEWPID flag

On Wed, 21 Mar 2007 12:41:03 -0700
sukadev@...ibm.com wrote:

> 
> This was discussed on containers and we thought it would be useful
> to reserve this flag.
> ---
> 
> From: Sukadev Bhattiprolu <sukadev@...ibm.com>
> Subject: [PATCH] Define CLONE_NEWPID flag
> 
> Define CLONE_NEWPID flag that will be used to clone pid namespaces.
> 
> Signed-off-by: Sukadev Bhattiprolu <sukadev@...ibm.com>
> ---
>  include/linux/sched.h |    1 +
>  1 file changed, 1 insertion(+)
> 
> Index: lx26-21-rc3-mm2/include/linux/sched.h
> ===================================================================
> --- lx26-21-rc3-mm2.orig/include/linux/sched.h	2007-03-20 20:13:19.000000000 -0700
> +++ lx26-21-rc3-mm2/include/linux/sched.h	2007-03-21 11:10:33.000000000 -0700
> @@ -26,6 +26,7 @@
>  #define CLONE_STOPPED		0x02000000	/* Start in stopped state */
>  #define CLONE_NEWUTS		0x04000000	/* New utsname group? */
>  #define CLONE_NEWIPC		0x08000000	/* New ipcs */
> +#define CLONE_NEWPID		0x10000000      /* New pid namespace */
>  

Do we actually have any need to reserve it at this time?  I'd have thought
that we could defer adding this until we have some code in-kernel which
uses it.

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