linux-kernel - Re: [RFC][PATCH] cgroup: Add new capability to allow a process to migrate other tasks between cgroups

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Message-ID: <20161005152711.GB26977@htj.duckdns.org>
Date:   Wed, 5 Oct 2016 11:27:11 -0400
From:   Tejun Heo <tj@...nel.org>
To:     "Serge E. Hallyn" <serge@...lyn.com>
Cc:     John Stultz <john.stultz@...aro.org>,
        lkml <linux-kernel@...r.kernel.org>,
        Li Zefan <lizefan@...wei.com>,
        Jonathan Corbet <corbet@....net>, cgroups@...r.kernel.org,
        Android Kernel Team <kernel-team@...roid.com>,
        Rom Lemarchand <romlem@...roid.com>,
        Colin Cross <ccross@...roid.com>,
        Dmitry Shmidt <dimitrysh@...gle.com>,
        Todd Kjos <tkjos@...gle.com>,
        Christian Poetzsch <christian.potzsch@...tec.com>,
        Amit Pundir <amit.pundir@...aro.org>
Subject: Re: [RFC][PATCH] cgroup: Add new capability to allow a process to
 migrate other tasks between cgroups

Hello,

On Tue, Oct 04, 2016 at 11:25:29PM -0500, Serge E. Hallyn wrote:
> > > If anything I'd say the GLOBAL_ROOT_UID check could be taken out since
> > > otherwise a host-root task effectively cannot drop this capability.
> > 
> > Is this ok to leave for a separate patch?
> 
> Yeah.  And I'm not sure whether Tejun would object to that idea.

With the capability, I think it'd be better to get rid of the explicit
UID check, but can we please rename the cap to CAP_CGROUP_MIGRATE and
loop in linux-api mailing list and ppl who are more familiar with
CAPs?

Thanks!

-- 
tejun