linux-kernel - Re: [PATCHv12 1/3] rdmacg: Added rdma cgroup controller

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Message-ID: <20160910161228.GB29259@lst.de>
Date:   Sat, 10 Sep 2016 18:12:28 +0200
From:   Christoph Hellwig <hch@....de>
To:     Parav Pandit <pandit.parav@...il.com>
Cc:     Christoph Hellwig <hch@....de>, Matan Barak <matanb@...lanox.com>,
        Tejun Heo <tj@...nel.org>, cgroups@...r.kernel.org,
        linux-doc@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-rdma@...r.kernel.org, Li Zefan <lizefan@...wei.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Doug Ledford <dledford@...hat.com>,
        Liran Liss <liranl@...lanox.com>,
        "Hefty, Sean" <sean.hefty@...el.com>,
        Jason Gunthorpe <jgunthorpe@...idianresearch.com>,
        Haggai Eran <haggaie@...lanox.com>,
        Jonathan Corbet <corbet@....net>, james.l.morris@...cle.com,
        serge@...lyn.com, Or Gerlitz <ogerlitz@...lanox.com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-security-module@...r.kernel.org
Subject: Re: [PATCHv12 1/3] rdmacg: Added rdma cgroup controller

On Wed, Sep 07, 2016 at 01:25:13PM +0530, Parav Pandit wrote:
> >  a) delay cgroups support until the grand rewrite is done
> >  b) add it now and deal with the consequences later
> >
> Can we do (b) now and differ adding any HW resources to cgroup until
> they are clearly called out.
> Architecture and APIs are already in place to support this.

Sounds fine to me.  The only thing I want to avoid is pie in the
sky "future proofing" that leads to horrible architectures.  And I assume
that's what Matan proposed.