Subject: Re: RFC [patch 13/34] PID Virtualization Define new task_pid api
From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Hubertus Franke <frankeh@watson.ibm.com>,
       Dave Hansen <haveblue@us.ibm.com>, Greg KH <greg@kroah.com>,
       "Serge E. Hallyn" <serue@us.ibm.com>,
       Arjan van de Ven <arjan@infradead.org>, linux-kernel@vger.kernel.org,
       Cedric Le Goater <clg@fr.ibm.com>
In-Reply-To: <m1oe22lp69.fsf@ebiederm.dsl.xmission.com>
References: <20060117143258.150807000@sergelap>
	 <20060117143326.283450000@sergelap>
	 <1137511972.3005.33.camel@laptopd505.fenrus.org>
	 <20060117155600.GF20632@sergelap.austin.ibm.com>
	 <1137513818.14135.23.camel@localhost.localdomain>
	 <1137518714.5526.8.camel@localhost.localdomain>
	 <20060118045518.GB7292@kroah.com>
	 <1137601395.7850.9.camel@localhost.localdomain>
	 <m1fyniomw2.fsf@ebiederm.dsl.xmission.com>
	 <43D14578.6060801@watson.ibm.com>
	 <m1hd7xmylo.fsf@ebiederm.dsl.xmission.com>
	 <43D52592.8080709@watson.ibm.com>
	 <m1oe22lp69.fsf@ebiederm.dsl.xmission.com>
Content-Type: text/plain
Content-Transfer-Encoding: 7bit
Date: Mon, 23 Jan 2006 21:11:23 +0000
Message-Id: <1138050684.24808.29.camel@localhost.localdomain>
Mime-Version: 1.0
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 797
Lines: 16

On Llu, 2006-01-23 at 12:28 -0700, Eric W. Biederman wrote:
> > Yes, that's possible.. In the current patch that is not a problem, because
> > the internal pid (aka kpid) == <vpid,containerid>  mangeled together.
> > So in those cases, the kernel would have to keep <pid, container_id>
> 
> Agreed, and for the internal implementation I think having them mangled
> together make sense, so long as we never export that form to userspace.

You have to refcount the container ids anyway or you may have stale
container references and end up reusing them.

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/