linux-kernel - Re: [RFC PATCH] fork: add CLONE

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Message-ID: <CAHk-=wifyY+XGNW=ZC4MyTHD14w81F8JjQNH-GaGAm2RxZ_S8Q@mail.gmail.com>
Date:   Thu, 11 Apr 2019 09:50:47 -0700
From:   Linus Torvalds <torvalds@...ux-foundation.org>
To:     Christian Brauner <christian@...uner.io>
Cc:     Al Viro <viro@...iv.linux.org.uk>, Jann Horn <jannh@...gle.com>,
        David Howells <dhowells@...hat.com>,
        Linux API <linux-api@...r.kernel.org>,
        Linux List Kernel Mailing <linux-kernel@...r.kernel.org>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Andrew Lutomirski <luto@...nel.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Kees Cook <keescook@...omium.org>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Michael Kerrisk-manpages <mtk.manpages@...il.com>,
        Jonathan Kowalski <bl0pbl33p@...il.com>,
        "Dmitry V. Levin" <ldv@...linux.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Oleg Nesterov <oleg@...hat.com>,
        Aleksa Sarai <cyphar@...har.com>,
        Joel Fernandes <joel@...lfernandes.org>,
        Daniel Colascione <dancol@...gle.com>
Subject: Re: [RFC PATCH] fork: add CLONE_PIDFD

On Wed, Apr 10, 2019 at 4:43 PM Christian Brauner <christian@...uner.io> wrote:
>
> RFC-2:
> This alternative patchset uses anonymous file descriptors instead of
> file descriptors from /proc/<pid>.

I think I prefer this one. Your diffstat makes it look bigger, but
that's because you added the example code to use this to that rfc..

Plus making anon_inodes unconditional makes sense anyway.  They are
always selected in practice to begin with.

               Linus