Re: [PATCH v1 1/2] proc: get process file descriptor from /proc/<pid>

[Andy Lutomirski]

On Mon, Nov 19, 2018 at 2:33 AM Christian Brauner <christian@xxxxxxxxxx> wrote:
>
> With this patch an open() call on /proc/<pid> will give userspace a handle
> to struct pid of the process associated with /proc/<pid>. This allows to
> maintain a stable handle on a process.
> I have been discussing various approaches extensively during technical
> conferences this year culminating in a long argument with Eric at Linux
> Plumbers. The general consensus was that having a handle on a process
> should be something that is very simple and easy to maintain with the
> option of being extensible via a more advanced api if the need arises. I
> believe that this patch is the most simple, dumb, and therefore
> maintainable solution.

How does the mechanism you're adding here differ from proc_pid()?