linux-kernel - Re: pidfd design

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Message-ID: <CAKOZuespjOTbaTDbgQLo=7PXTE-nYCLy7k=s+RJh_GpZ_5gwgg@mail.gmail.com>
Date:   Wed, 20 Mar 2019 13:14:01 -0700
From:   Daniel Colascione <dancol@...gle.com>
To:     Alexey Dobriyan <adobriyan@...il.com>
Cc:     Christian Brauner <christian@...uner.io>,
        linux-kernel <linux-kernel@...r.kernel.org>,
        Joel Fernandes <joel@...lfernandes.org>,
        Andy Lutomirski <luto@...nel.org>
Subject: Re: pidfd design

On Wed, Mar 20, 2019 at 1:07 PM Alexey Dobriyan <adobriyan@...il.com> wrote:
> > What would be your opinion to having a
> > /proc/<pid>/handle
> > file instead of having a dirfd.
>
> This is even worse than depending on PROC_FS. Just for the dependency
> pidfd code should be backed out immediately. Forget about /proc.

We already have pidfds, and we've had them since /proc was added ages
ago. Backing out procfs is a bold proposal.