linux-kernel - Re: [PATCH 03/33] task containersv11 add tasks file interface

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Date:	Wed, 3 Oct 2007 11:15:57 -0700
From:	"Paul Menage" <menage@...gle.com>
To:	"Paul Jackson" <pj@....com>
Cc:	akpm@...ux-foundation.org, balbir@...ux.vnet.ibm.com,
	serue@...ibm.com, clg@...ibm.com, ebiederm@...ssion.com,
	xemul@...nvz.org, rientjes@...gle.com, svaidy@...ux.vnet.ibm.com,
	nickpiggin@...oo.com.au, a.p.zijlstra@...llo.nl,
	containers@...ts.osdl.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 03/33] task containersv11 add tasks file interface

On 10/3/07, Paul Jackson <pj@....com> wrote:
>
> So after changing the 'cpus' of a cpuset, you (something in
> user space) then has to rewrite every pid in that cpusets
> tasks file back to that same tasks file, in order to get the
> change to be applied to each of those tasks, and get them to
> start running on their new CPUs.

What happens to the new child that got forked right between userspace
reading the 'tasks' file and writing back the pids?

Paul
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