linux-kernel - Re: [PATCH v3 2/2] dmabuf: Add dmabuf inode number to /proc/*/fdinfo

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Date:   Thu, 4 Feb 2021 18:36:43 -0800
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Kalesh Singh <kaleshsingh@...gle.com>
Cc:     jannh@...gle.com, jeffv@...gle.com, keescook@...omium.org,
        surenb@...gle.com, minchan@...nel.org, hridya@...gle.com,
        kernel-team@...roid.com, Alexey Dobriyan <adobriyan@...il.com>,
        Jonathan Corbet <corbet@....net>,
        Sumit Semwal <sumit.semwal@...aro.org>,
        Christian König <christian.koenig@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        Michal Hocko <mhocko@...e.com>,
        Alexey Gladkov <gladkov.alexey@...il.com>,
        Anand K Mistry <amistry@...gle.com>,
        NeilBrown <neilb@...e.de>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Michel Lespinasse <walken@...gle.com>,
        Bernd Edlinger <bernd.edlinger@...mail.de>,
        Andrei Vagin <avagin@...il.com>,
        Yafang Shao <laoar.shao@...il.com>,
        Christian Brauner <christian.brauner@...ntu.com>,
        linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
        linux-doc@...r.kernel.org, linux-media@...r.kernel.org,
        dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org
Subject: Re: [PATCH v3 2/2] dmabuf: Add dmabuf inode number to /proc/*/fdinfo

On 2/4/21 6:23 PM, Kalesh Singh wrote:
> If a FD refers to a DMA buffer add the DMA buffer inode number to
> /proc/<pid>/fdinfo/<FD> and /proc/<pid>/task/<tid>/fdindo/<FD>.
> 
> The dmabuf inode number allows userspace to uniquely identify the buffer
> and avoids a dependency on /proc/<pid>/fd/* when accounting per-process
> DMA buffer sizes.
> 
> Signed-off-by: Kalesh Singh <kaleshsingh@...gle.com>
> ---
> Changes in v3:
>   - Add documentation in proc.rst

Hi,
Thanks for the doc update.

> Changes in v2:
>   - Update patch description
> 
>  Documentation/filesystems/proc.rst | 17 +++++++++++++++++
>  drivers/dma-buf/dma-buf.c          |  1 +
>  2 files changed, 18 insertions(+)
> 

Acked-by: Randy Dunlap <rdunlap@...radead.org> # for Documentation/filesystems/proc.rst


-- 
~Randy