From mboxrd@z Thu Jan  1 00:00:00 1970
From: ebiederm@xmission.com (Eric W. Biederman)
Subject: Re: [RFC][PATCH] ns: Syscalls for better namespace sharing control.
Date: Fri, 26 Feb 2010 13:42:06 -0800
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Cc: hadi@cyberus.ca, Daniel Lezcano <dlezcano@fr.ibm.com>,
	Patrick McHardy <kaber@trash.net>,
	Linux Netdev List <netdev@vger.kernel.org>,
	containers@lists.linux-foundation.org,
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	Ben Greear <greearb@candelatech.com>,
	Serge Hallyn <serue@us.ibm.com>,
	Matt Helsley <matthltc@us.ibm.com>
To: Pavel Emelyanov <xemul@parallels.com>
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In-Reply-To: <4B883E6F.1060907@parallels.com> (Pavel Emelyanov's message of "Sat\, 27 Feb 2010 00\:34\:39 +0300")
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Pavel Emelyanov <xemul@parallels.com> writes:

>>> Yet another set of per-namespace IDs along with CLONE_NEWXXX ones?
>>> I currently have a way to create all namespaces we have with one
>>> syscall. Why don't we have an ability to enter them all with one syscall?
>> 
>> The CLONE_NEWXXX series of bits has been an royal pain to work with,
>> and it appears to be unnecessary complications for no gain.
>
> That's the answer for the "Yet another set..." question.
> How about the "Why don't we have..." one?

I am not certain which question you are asking:

Why don't we have an ability to enter all namespaces with one syscall
invocation?

Why don't we have a syscall that allows us to enter every namespace?

Eric