linux-kernel - Re: [PATCH 0/2] CGroups: cgroup member list enhancement/fix

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Message-ID: <6599ad830907101658i13e4046br70377a487dd6b49b@mail.gmail.com>
Date:	Fri, 10 Jul 2009 16:58:23 -0700
From:	Paul Menage <menage@...gle.com>
To:	balbir@...ux.vnet.ibm.com
Cc:	lizf@...fujitzu.com, serue@...ibm.com, akpm@...ux-foundation.org,
	containers@...ts.linux-foundation.org, bblum@...gle.com,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/2] CGroups: cgroup member list enhancement/fix

On Sat, Jul 4, 2009 at 11:38 PM, Balbir Singh<balbir@...ux.vnet.ibm.com> wrote:
>
> Paul, I don't see an interface to migrate all procs or at-least I
> can't read it in the changelog. As discussed in the containers
> mini-summit in 2008, it would be a nice thing to have (I've not looked
> at the implementation yet).
>

We're still working on that bit.

We want to provide the guarantee that if you write a tgid to the procs
file, all its threads get migrated even if you race with a clone()
call, and are trying to figure out a nice way to do that without
introducing unnecessary overhead/synchronization in the fork path.

Paul
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