linux-kernel - Re: [PATCH 2.6.24-rc8-mm1 00/15] IPC: code rewrite + new functionalities

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Message-ID: <20080204195150.GA4915@elf.ucw.cz>
Date:	Mon, 4 Feb 2008 20:51:50 +0100
From:	Pavel Machek <pavel@....cz>
To:	Benjamin Thery <benjamin.thery@...l.net>
Cc:	pierre.peiffer@...l.net, containers@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2.6.24-rc8-mm1 00/15] IPC: code rewrite + new
	functionalities

Hi!

>>> 	As the namespaces and the "containers" are being integrated in the
>>> kernel, these functionalities may be a first step to implement  the
>>> checkpoint/restart of an application: in fact the existing API does not allow
>>> to specify or to change an ID when creating an IPC, when restarting an
>>> application, and the times/pids values of each IPCs are also altered. May be
>>> someone may find another interest about this ?
>>>
>>> So again, comments are welcome.
>>
>> Checkpoint/restart is nice, but... sysV ipc is broken by design, do we
>> really want to extend it?

>
> For my personal culture, what do you mean by "broken by design"?


       int shmget(key_t key, size_t size, int shmflg);

....so how do you produce key in a way that is guaranteed not to
interfere with other uses?
								Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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