linux-kernel - Re: [PATCH] capabilities: add capability cgroup controller

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Message-ID: <CAOS58YM+h0w_UciXLbiJcKizPkXV66FL57LT7Mc+RRWspN+Y2Q@mail.gmail.com>
Date:	Mon, 27 Jun 2016 15:17:45 -0400
From:	Tejun Heo <tj@...nel.org>
To:	Topi Miettinen <toiwoton@...il.com>
Cc:	"Serge E. Hallyn" <serge@...lyn.com>,
	lkml <linux-kernel@...r.kernel.org>, luto@...nel.org,
	Kees Cook <keescook@...omium.org>,
	Jonathan Corbet <corbet@....net>,
	Li Zefan <lizefan@...wei.com>,
	Johannes Weiner <hannes@...xchg.org>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	James Morris <james.l.morris@...cle.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	David Howells <dhowells@...hat.com>,
	David Woodhouse <David.Woodhouse@...el.com>,
	Ard Biesheuvel <ard.biesheuvel@...aro.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Petr Mladek <pmladek@...e.com>,
	"open list:DOCUMENTATION" <linux-doc@...r.kernel.org>,
	"open list:CONTROL GROUP (CGROUP)" <cgroups@...r.kernel.org>,
	"open list:CAPABILITIES" <linux-security-module@...r.kernel.org>
Subject: Re: [PATCH] capabilities: add capability cgroup controller

Hello,

On Mon, Jun 27, 2016 at 3:10 PM, Topi Miettinen <toiwoton@...il.com> wrote:
> I'll have to study these more. But from what I saw so far, it looks to
> me that a separate tool would be needed to read taskstats and if that
> tool is not taken by distros, the users would not be any wiser, right?
> With cgroup (or /proc), no new tools would be needed.

That is a factor but shouldn't be a deciding factor in designing our
user-facing interfaces. Please also note that kernel source tree
already has tools/ subdirectory which contains userland tools which
are distributed along with the kernel.

Thanks.

-- 
tejun