linux-kernel - RE: [PATCH v2 0/5] pid: add pidfd

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Message-ID: <8c53a2601a3742bbb017a2a8aca77eaf@AcuMS.aculab.com>
Date:   Mon, 1 Apr 2019 17:00:03 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Daniel Colascione' <dancol@...gle.com>,
        Linus Torvalds <torvalds@...ux-foundation.org>
CC:     Jonathan Kowalski <bl0pbl33p@...il.com>,
        Aleksa Sarai <cyphar@...har.com>,
        Andy Lutomirski <luto@...capital.net>,
        Christian Brauner <christian@...uner.io>,
        Jann Horn <jannh@...gle.com>,
        Andrew Lutomirski <luto@...nel.org>,
        David Howells <dhowells@...hat.com>,
        "Serge E. Hallyn" <serge@...lyn.com>,
        Linux API <linux-api@...r.kernel.org>,
        "Linux List Kernel Mailing" <linux-kernel@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        "Eric W. Biederman" <ebiederm@...ssion.com>,
        Konstantin Khlebnikov <khlebnikov@...dex-team.ru>,
        Kees Cook <keescook@...omium.org>,
        "Alexey Dobriyan" <adobriyan@...il.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Michael Kerrisk-manpages <mtk.manpages@...il.com>,
        "Dmitry V. Levin" <ldv@...linux.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Oleg Nesterov <oleg@...hat.com>,
        Nagarathnam Muthusamy <nagarathnam.muthusamy@...cle.com>,
        Al Viro <viro@...iv.linux.org.uk>,
        Joel Fernandes <joel@...lfernandes.org>
Subject: RE: [PATCH v2 0/5] pid: add pidfd_open()

From: Daniel Colascione
> Sent: 01 April 2019 17:45
...
> > Now, none of this was ever really used. The people who wanted AIO
> > wanted the brain-damaged POSIX kind of AIO, not something cool and
> > clever. So I suspect the whole exit-signal thing was just used for
> > random small per-project things.
> 
> AIO is a whole other ball of wax. :-)

For AIO you need to go back and tell K&R to use the IO_QIO stuff from
RSX/11M rather than the 'IO in process context' they used for Unix :-)

Then you'd end up with the windows kernel.....

	David

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