From: Cedric Le Goater <clg@fr.ibm.com>
To: Herbert Poetzl <herbert@13thfloor.at>
Cc: Kirill Korotaev <dev@sw.ru>,
"Eric W. Biederman" <ebiederm@xmission.com>,
linux-kernel@vger.kernel.org, vserver@list.linux-vserver.org,
"Serge E. Hallyn" <serue@us.ibm.com>,
Alan Cox <alan@lxorguk.ukuu.org.uk>,
Dave Hansen <haveblue@us.ibm.com>,
Arjan van de Ven <arjan@infradead.org>,
Suleiman Souhlal <ssouhlal@FreeBSD.org>,
Hubertus Franke <frankeh@watson.ibm.com>,
Kyle Moffett <mrmacman_g4@mac.com>, Greg <gkurz@fr.ibm.com>,
Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>,
Greg KH <greg@kroah.com>, Rik van Riel <riel@redhat.com>,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
Andrey Savochkin <saw@sawoct.com>,
Kirill Korotaev <dev@openvz.org>, Andi Kleen <ak@suse.de>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Jeff Garzik <jgarzik@pobox.com>,
Trond Myklebust <trond.myklebust@fys.uio.no>,
Jes Sorensen <jes@sgi.com>
Subject: Re: [RFC][PATCH 04/20] pspace: Allow multiple instaces of the process id namespace
Date: Wed, 01 Mar 2006 23:06:34 +0100 [thread overview]
Message-ID: <44061AEA.5040304@fr.ibm.com> (raw)
In-Reply-To: <20060220150811.GA18841@MAIL.13thfloor.at>
Herbert Poetzl wrote:
>>>>First of all, I don't think syscalls like
>>>>"do_something and exec" should be introduced.
>>>
>>>Linux-VServer does not have any of those syscalls
>>>and it works quite well, so why should we need such
>>>syscalls?
>>
>>My question is the same! Why?
>
>
> because we don't need them?!
I think that the reason behind such syscalls is to make sure that the
process is "clean" when it enters a new container. "clean" means that the
process is not holding in memory an identifier, like a pid for instance,
that doesn't make sense in the new container.
This is really a edge case which supposes that processes changing
containers don't know what they are doing. This case also depends on how
identifiers will be virtualized.
C.
next prev parent reply other threads:[~2006-03-01 22:06 UTC|newest]
Thread overview: 78+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-02-06 19:19 [RFC][PATCH 0/20] Multiple instances of the process id namespace Eric W. Biederman
2006-02-06 19:22 ` [RFC][PATCH 01/20] pid: Intoduce the concept of a wid (wait id) Eric W. Biederman
2006-02-06 19:27 ` [RFC][PATCH 02/20] pspace: The parent process id of pid 1 is always 0 Eric W. Biederman
2006-02-06 19:29 ` [RFC][PATCH 03/20] pid: Introduce a generic helper to test for init Eric W. Biederman
2006-02-06 19:34 ` [RFC][PATCH 04/20] pspace: Allow multiple instaces of the process id namespace Eric W. Biederman
2006-02-06 19:36 ` [RFC][PATCH 05/20] sched: Fixup the scheduler syscalls to deal with pspaces Eric W. Biederman
2006-02-06 19:39 ` [RFC][PATCH 06/20] cad_pid: Fixup the cad_pid users to assume it is in the initial process id namespace Eric W. Biederman
2006-02-06 19:41 ` [RFC][PATCH 07/20] tty: Update the tty layer to work with pspaces Eric W. Biederman
2006-02-06 19:44 ` [RFC][PATCH 08/20] vt: Update the virtual console to handle pspaces Eric W. Biederman
2006-02-06 19:46 ` [RFC][PATCH 09/20] ptrace: Update ptrace " Eric W. Biederman
2006-02-06 19:49 ` [RFC][PATCH 10/20] capabilities: Update the capabilities code to " Eric W. Biederman
2006-02-06 19:51 ` [RFC][PATCH 11/20] ioprio: Update ioprio " Eric W. Biederman
2006-02-06 19:54 ` [RFC][PATCH 12/20] fcntl: Update fcntl to work with pspaces Eric W. Biederman
2006-02-06 19:57 ` [RFC][PATCH 13/20] kthread: Update kthread " Eric W. Biederman
2006-02-06 19:59 ` [RFC][PATCH 14/20] mm: Update vmscan " Eric W. Biederman
2006-02-06 20:00 ` [RFC][PATCH 15/20] posix-timers: Update posix timers " Eric W. Biederman
2006-02-06 20:02 ` [PATCH 16/20] nfs: Don't use pids to track the lockd server process Eric W. Biederman
2006-02-06 20:03 ` [RFC][PATCH 17/20] usb: Fixup usb so it works with pspaces Eric W. Biederman
2006-02-06 20:05 ` [RFC][PATCH 18/20] posix-mqueue: Make mqueues work with pspspaces Eric W. Biederman
2006-02-06 20:07 ` [RFC][PATCH 19/20] pspace: Upcate the pid_max sysctl to work in a per pspace fashion Eric W. Biederman
2006-02-06 20:12 ` [RFC][PATCH 20/20] proc: Update /proc to support multiple pid spaces Eric W. Biederman
2006-02-10 20:40 ` Kirill Korotaev
2006-02-11 10:10 ` Eric W. Biederman
2006-02-06 20:41 ` [RFC][PATCH 17/20] usb: Fixup usb so it works with pspaces Serge E. Hallyn
2006-02-06 20:53 ` Eric W. Biederman
2006-02-07 16:41 ` [RFC][PATCH 04/20] pspace: Allow multiple instaces of the process id namespace William Lee Irwin III
2006-02-07 17:05 ` Eric W. Biederman
2006-02-10 20:30 ` Kirill Korotaev
2006-02-11 9:42 ` Eric W. Biederman
2006-02-11 10:11 ` Eric W. Biederman
2006-02-11 10:43 ` Eric W. Biederman
2006-02-13 8:53 ` Kirill Korotaev
2006-02-13 16:40 ` Dave Hansen
2006-02-11 11:03 ` Eric W. Biederman
2006-02-13 9:02 ` Kirill Korotaev
2006-02-13 21:31 ` Serge E. Hallyn
2006-02-13 23:41 ` Eric W. Biederman
2006-02-11 11:57 ` Eric W. Biederman
2006-02-13 9:22 ` Kirill Korotaev
2006-02-13 17:02 ` Serge E. Hallyn
2006-02-14 5:59 ` Eric W. Biederman
2006-02-14 5:54 ` Eric W. Biederman
2006-02-14 18:45 ` Dave Hansen
2006-02-15 12:07 ` Kirill Korotaev
2006-02-15 13:31 ` Herbert Poetzl
2006-02-16 13:44 ` Serge E. Hallyn
2006-02-20 9:27 ` Kirill Korotaev
2006-02-20 17:04 ` Herbert Poetzl
2006-02-21 16:29 ` Kirill Korotaev
2006-02-21 23:23 ` Herbert Poetzl
2006-02-20 11:29 ` Kirill Korotaev
2006-02-20 12:34 ` Herbert Poetzl
2006-02-20 14:11 ` Kirill Korotaev
2006-02-20 15:08 ` Herbert Poetzl
2006-03-01 22:06 ` Cedric Le Goater [this message]
2006-02-15 18:40 ` Eric W. Biederman
2006-02-06 19:56 ` [RFC][PATCH 03/20] pid: Introduce a generic helper to test for init Dave Hansen
2006-02-06 20:22 ` Eric W. Biederman
2006-02-07 15:08 ` Geert Uytterhoeven
2006-02-07 15:17 ` Eric W. Biederman
2006-02-06 19:54 ` [RFC][PATCH 01/20] pid: Intoduce the concept of a wid (wait id) Serge E. Hallyn
2006-02-06 20:23 ` Eric W. Biederman
2006-02-07 17:39 ` Jeff Dike
2006-02-07 18:32 ` Eric W. Biederman
2006-02-10 18:51 ` Kirill Korotaev
2006-02-11 9:25 ` Eric W. Biederman
2006-02-13 8:43 ` Kirill Korotaev
2006-02-14 0:04 ` Eric W. Biederman
2006-02-06 20:40 ` [RFC][PATCH 0/20] Multiple instances of the process id namespace Hubertus Franke
2006-02-06 20:51 ` Eric W. Biederman
2006-02-06 21:07 ` Hubertus Franke
2006-02-06 21:56 ` Eric W. Biederman
2006-02-07 0:48 ` Dave Hansen
2006-02-07 5:14 ` Eric W. Biederman
2006-02-07 9:33 ` Andi Kleen
2006-02-08 4:19 ` Randy.Dunlap
2006-02-08 4:28 ` Eric W. Biederman
2006-02-08 4:51 ` Randy.Dunlap
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