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From:   Jann Horn <jannh@google.com>
Date:   Mon, 29 Apr 2019 20:38:36 -0400
Message-ID: <CAG48ez1CV54c1xZ9s26ym=9avkihiNi=ppW-CWA1-qrCpYdc1A@mail.gmail.com>
Subject: Re: RFC: on adding new CLONE_* flags [WAS Re: [PATCH 0/4] clone: add CLONE_PIDFD]
To:     Linus Torvalds <torvalds@linux-foundation.org>
Cc:     Kevin Easton <kevin@guarana.org>,
        Andy Lutomirski <luto@kernel.org>,
        Christian Brauner <christian@brauner.io>,
        Aleksa Sarai <cyphar@cyphar.com>,
        "Enrico Weigelt, metux IT consult" <lkml@metux.net>,
        Al Viro <viro@zeniv.linux.org.uk>,
        David Howells <dhowells@redhat.com>,
        Linux API <linux-api@vger.kernel.org>,
        LKML <linux-kernel@vger.kernel.org>,
        "Serge E. Hallyn" <serge@hallyn.com>,
        Arnd Bergmann <arnd@arndb.de>,
        "Eric W. Biederman" <ebiederm@xmission.com>,
        Kees Cook <keescook@chromium.org>,
        Thomas Gleixner <tglx@linutronix.de>,
        Michael Kerrisk <mtk.manpages@gmail.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        Oleg Nesterov <oleg@redhat.com>,
        Joel Fernandes <joel@joelfernandes.org>,
        Daniel Colascione <dancol@google.com>
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On Mon, Apr 29, 2019 at 4:21 PM Linus Torvalds
<torvalds@linux-foundation.org> wrote:
>
> On Mon, Apr 29, 2019 at 12:55 PM Jann Horn <jannh@google.com> wrote:
> >
> > ... I guess that already has a name, and it's called vfork(). (Well,
> > except that the Linux vfork() isn't a real vfork().)
>
> What?
>
> Linux vfork() is very much a real vfork(). What do you mean?

... uuuh, whoops. Turns out I don't know what I'm talking about.
Nevermind. For some reason I thought vfork() was just
CLONE_VFORK|SIGCHLD, but now I see I got that completely wrong.