linux-kernel - Re: [RFC][PATCH 0/3] fork: Add the ability to create tasks with given pids

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Date:	Thu, 17 Nov 2011 17:02:50 +0100
From:	Oleg Nesterov <oleg@...hat.com>
To:	Pavel Emelyanov <xemul@...allels.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alan Cox <alan@...ux.intel.com>,
	Roland McGrath <roland@...k.frob.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Tejun Heo <tj@...nel.org>,
	Cyrill Gorcunov <gorcunov@...nvz.org>,
	James Bottomley <jbottomley@...allels.com>
Subject: Re: [RFC][PATCH 0/3] fork: Add the ability to create tasks with
	given pids

On 11/17, Pavel Emelyanov wrote:
>
> On 11/17/2011 07:49 PM, Oleg Nesterov wrote:
> >
> > But. Speaking of API, it differs a bit compared to the previous version...
> >
> >> The API will be used like in the code below
> >>
> >> 	/* restore new pid namespace with an init in it */
> >> 	pid = clone(CLONE_NEWPID);
> >
> > Yes, CLONE_NEWPID | CLONE_CHILD_USEPIDS is not possible.
>
> It should be.

Yes, I was wrong, sorry. I misread the ->child_reaper == NULL in 3/3.

We simply ignore child_tidptr[0] in this case. This should work.

Oleg.

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