linux-kernel - Re: [PATCH v6 1/6] gpu: rfc: Proposal for a GPU cgroup controller

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Date:   Thu, 5 May 2022 16:56:30 -0700
From:   "T.J. Mercier" <tjmercier@...gle.com>
To:     Michal Koutný <mkoutny@...e.com>
Cc:     Tejun Heo <tj@...nel.org>, Zefan Li <lizefan.x@...edance.com>,
        Johannes Weiner <hannes@...xchg.org>,
        Jonathan Corbet <corbet@....net>,
        Daniel Vetter <daniel@...ll.ch>,
        Hridya Valsaraju <hridya@...gle.com>,
        Christian König <christian.koenig@....com>,
        John Stultz <jstultz@...gle.com>,
        Todd Kjos <tkjos@...roid.com>,
        Carlos Llamas <cmllamas@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Kalesh Singh <kaleshsingh@...gle.com>, Kenny.Ho@....com,
        Shuah Khan <skhan@...uxfoundation.org>,
        kernel-team@...roid.com, cgroups@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v6 1/6] gpu: rfc: Proposal for a GPU cgroup controller

On Thu, May 5, 2022 at 4:29 AM Michal Koutný <mkoutny@...e.com> wrote:
>
> On Wed, May 04, 2022 at 10:16:50AM -0700, "T.J. Mercier" <tjmercier@...gle.com> wrote:
> > However the only names that would result from this series are the
> > names of the dma-buf heaps, with "-heap" appended. So they are
> > predictable from the /dev/dma_heap/* names, and only the system and
> > cma heaps currently exist upstream.
>
> It's not so important with the read-only stats currently posted (a
> crafted sysfs file with these names would be an overlikill)...
>
> >
> > For other future uses of this controller I thought we were headed in
> > the direction of "standardized" names which would be
> > predefined/hardcoded and documented, so these names wouldn't really
> > need to be made available to a user at runtime.
> > https://lore.kernel.org/lkml/CABdmKX3gTAohaOwkNccGrQyXN9tzT-oEVibO5ZPF+eP+Vq=AOg@mail.gmail.com/
>
> (Ah, I see.)
>
> ...but if writers (limits) are envisioned, the keys should represent
> something that the user can derive/construct from available info -- e.g.
> the documentation.
>
> OK, so I understand current form just presents some statistics.
>
Yup, thanks for taking a look.

> Michal