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Re: [patch] PID namespace design bug, workaround

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From: Arjan van de Ven <arjan@...>
To: Linus Torvalds <torvalds@...>
Cc: Ingo Molnar <mingo@...>, Dave Hansen <haveblue@...>, Andrew Morton <akpm@...>, Pavel Emelyanov <xemul@...>, Ulrich Drepper <drepper@...>, <linux-kernel@...>, Dinakar Guniguntala [imap] <dino@...>, Sripathi Kodi <sripathik@...>
Subject: Re: [patch] PID namespace design bug, workaround
Date: Saturday, November 3, 2007 - 7:55 pm

On Sat, 3 Nov 2007 15:40:48 -0700 (PDT)
Linus Torvalds <torvalds@linux-foundation.org> wrote:


well... kind of.
THere are 2 things around pid namespaces: which pids you can see/touch
(in proc or signals or otherwise), and the non-uniqueness.

For containers you clearly want the first part... but... is there a
strong reason to not just *not* create duplicate pids even across
namespaces? there's no rule in posix or anything similar to fd's afaik
concerning which pids we can hand out... so we could just make then
unique globally but just with limited visibility....
-
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Messages in current thread:
[patch] PID namespace design bug, workaround, Ingo Molnar, (Thu Nov 1, 10:43 am)
Re: [patch] PID namespace design bug, workaround, Pavel Emelyanov, (Thu Nov 1, 11:02 am)
Re: [patch] PID namespace design bug, workaround, Ulrich Drepper, (Thu Nov 1, 10:53 am)
Re: [patch] PID namespace design bug, workaround, Ingo Molnar, (Thu Nov 1, 11:05 am)
Re: [patch] PID namespace design bug, workaround, Theodore Tso, (Thu Nov 1, 2:57 pm)
Re: [patch] PID namespace design bug, workaround, Ingo Molnar, (Thu Nov 1, 3:53 pm)
Re: [patch] PID namespace design bug, workaround, Ulrich Drepper, (Thu Nov 1, 8:23 pm)
Re: [patch] PID namespace design bug, workaround, Pavel Emelyanov, (Thu Nov 1, 10:51 am)
Re: [patch] PID namespace design bug, workaround, Ulrich Drepper, (Thu Nov 1, 10:56 am)
Re: [patch] PID namespace design bug, workaround, Dave Hansen, (Thu Nov 1, 12:12 pm)
Re: [patch] PID namespace design bug, workaround, Pavel Emelyanov, (Thu Nov 1, 11:05 am)
Re: [patch] PID namespace design bug, workaround, Ulrich Drepper, (Thu Nov 1, 8:21 pm)
Re: [patch] PID namespace design bug, workaround, Pavel Emelyanov, (Fri Nov 2, 3:55 am)
Re: [patch] PID namespace design bug, workaround, Andrew Morton, (Fri Nov 2, 4:04 am)
Re: [patch] PID namespace design bug, workaround, Dave Hansen, (Fri Nov 2, 1:30 pm)
Re: [patch] PID namespace design bug, workaround, Linus Torvalds, (Fri Nov 2, 1:39 pm)
Re: [patch] PID namespace design bug, workaround, Ingo Molnar, (Sat Nov 3, 4:12 pm)
Futexes and network filesystems., Er ic W. Biederman, (Tue Nov 20, 6:53 pm)
Re: Futexes and network filesystems., Kyle Moffett, (Wed Nov 21, 2:16 am)
Re: Futexes and network filesystems., Eric W. Biederman, (Wed Nov 21, 2:30 am)
Re: [patch] PID namespace design bug, workaround, Linus Torvalds, (Sat Nov 3, 6:40 pm)
Re: [patch] PID namespaces, Ingo Molnar, (Sun Nov 4, 6:38 am)
Re: [patch] PID namespaces, Denys Vlasenko, (Mon Nov 5, 10:47 am)
Re: [patch] PID namespaces, Dave Hansen, (Sun Nov 4, 4:12 pm)
Re: [patch] PID namespace design bug, workaround, Arjan van de Ven, (Sat Nov 3, 7:55 pm)
Re: [patch] PID namespace design bug, workaround, , (Sat Nov 3, 8:21 pm)
Re: [patch] PID namespace design bug, workaround, Nicholas Miell, (Sat Nov 3, 12:02 am)
Re: [patch] PID namespace design bug, workaround, Pavel Emelyanov, (Fri Nov 2, 4:14 am)
Re: [patch] PID namespace design bug, workaround, Ulrich Drepper, (Fri Nov 2, 10:05 am)
Re: [patch] PID namespace design bug, workaround, Pavel Emelyanov, (Fri Nov 2, 10:21 am)
Re: [patch] PID namespace design bug, workaround, , (Sat Nov 3, 4:01 pm)
Re: [patch] PID namespace design bug, workaround, Eric W. Biederman, (Sun Nov 4, 3:17 am)
Re: [patch] PID namespace design bug, workaround, Ulrich Drepper, (Fri Nov 2, 11:34 am)
Re: [patch] PID namespace design bug, workaround, Pavel Emelyanov, (Fri Nov 2, 11:58 am)
Re: [patch] PID namespace design bug, workaround, Ulrich Drepper, (Sat Nov 3, 12:34 am)
Re: [patch] PID namespace design bug, workaround, Pavel Emelyanov, (Tue Nov 6, 3:49 am)
Re: [patch] PID namespace design bug, workaround, Theodore Tso, (Fri Nov 2, 5:39 pm)
Re: [patch] PID namespace design bug, workaround, Peter Zijlstra, (Thu Nov 1, 10:56 am)
Re: [patch] PID namespace design bug, workaround, Pavel Emelyanov, (Thu Nov 1, 11:06 am)
Re: [patch] PID namespace design bug, workaround, Ingo Molnar, (Thu Nov 1, 11:17 am)
Re: [patch] PID namespace design bug, workaround, Pavel Emelyanov, (Thu Nov 1, 11:30 am)