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From: "Serge E. Hallyn" <serge-A9i7LUbDfNHQT0dZR+AlfA@public.gmane.org>
To: "Eric W. Biederman" <ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org>
Cc: Michael Kerrisk
	<mtk.manpages-gM/Ye1E23mwN+BqQ9rBEUg@public.gmane.org>,
	Kirill Korotaev <dev-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>,
	Pavel Emelianov <xemul-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org>,
	Cedric Le Goater <clg-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>,
	lkml <linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
	linux-man-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: CLONE_NEWIPC documentation
Date: Sun, 23 Nov 2008 16:48:42 -0600	[thread overview]
Message-ID: <20081123224842.GD12687@hallyn.com> (raw)
In-Reply-To: <m163mji4cz.fsf-B27657KtZYmhTnVgQlOflh2eb7JE58TQ@public.gmane.org>

Quoting Eric W. Biederman (ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org):
> > +This flag is intended for the implementation of control groups.
> 
> The above sentence is wrong.
> 
> +This flag is intended for the implementation of containers.
> 
> Would be correct.
> 
> Both control groups and namespaces feed into the user space container
> concept.  Control groups are multiprocess resource limits.
> Namespaces are affect the mapping from resource name to resource.
> 
> What is interesting is you can unshare a sysvipc namespace and still have
> sysvipc shared memory mapped from another sysvipc namespace.
> 
> This is something that needs to be watched for.

Oh, I see, so please disregard my last msg, it seems Eric was plenty
clear.

thanks,
-serge
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WARNING: multiple messages have this Message-ID (diff)
From: "Serge E. Hallyn" <serge@hallyn.com>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Michael Kerrisk <mtk.manpages@googlemail.com>,
	Kirill Korotaev <dev@openvz.org>,
	Pavel Emelianov <xemul@openvz.org>,
	Cedric Le Goater <clg@fr.ibm.com>,
	lkml <linux-kernel@vger.kernel.org>,
	linux-man@vger.kernel.org
Subject: Re: CLONE_NEWIPC documentation
Date: Sun, 23 Nov 2008 16:48:42 -0600	[thread overview]
Message-ID: <20081123224842.GD12687@hallyn.com> (raw)
In-Reply-To: <m163mji4cz.fsf@frodo.ebiederm.org>

Quoting Eric W. Biederman (ebiederm@xmission.com):
> > +This flag is intended for the implementation of control groups.
> 
> The above sentence is wrong.
> 
> +This flag is intended for the implementation of containers.
> 
> Would be correct.
> 
> Both control groups and namespaces feed into the user space container
> concept.  Control groups are multiprocess resource limits.
> Namespaces are affect the mapping from resource name to resource.
> 
> What is interesting is you can unshare a sysvipc namespace and still have
> sysvipc shared memory mapped from another sysvipc namespace.
> 
> This is something that needs to be watched for.

Oh, I see, so please disregard my last msg, it seems Eric was plenty
clear.

thanks,
-serge

  parent reply	other threads:[~2008-11-23 22:48 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-11-19 19:12 CLONE_NEWIPC documentation Michael Kerrisk
     [not found] ` <4924651C.4080909-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2008-11-20  1:16   ` Eric W. Biederman
2008-11-20  1:16     ` Eric W. Biederman
     [not found]     ` <m163mji4cz.fsf-B27657KtZYmhTnVgQlOflh2eb7JE58TQ@public.gmane.org>
2008-11-20  8:36       ` Cedric Le Goater
2008-11-20  8:36         ` Cedric Le Goater
     [not found]         ` <49252174.7080709-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>
2008-11-20 11:28           ` Michael Kerrisk
2008-11-20 11:28             ` Michael Kerrisk
     [not found]             ` <cfd18e0f0811200328g643c1bdq46a48bac3a1ea744-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2008-11-20 12:26               ` Cedric Le Goater
2008-11-20 12:26                 ` Cedric Le Goater
     [not found]                 ` <4925575D.8060704-NmTC/0ZBporQT0dZR+AlfA@public.gmane.org>
2008-11-20 16:28                   ` Michael Kerrisk
2008-11-20 16:28                     ` Michael Kerrisk
2008-11-23 22:48       ` Serge E. Hallyn [this message]
2008-11-23 22:48         ` Serge E. Hallyn
  -- strict thread matches above, loose matches on Subject: below --
2007-08-05  9:35 Michael Kerrisk
2007-08-05 12:24 ` Eric W. Biederman
2007-08-06  6:36   ` Michael Kerrisk

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