From: Miod Vallat <miod@online.fr>
To: TUHS main list <tuhs@minnie.tuhs.org>
Subject: Re: [TUHS] First Unix-like OSes not derived from AT&T code?
Date: Tue, 3 May 2022 07:40:11 +0000 [thread overview]
Message-ID: <YnDcW8aX/3WoGVDQ@tarentaine.gentiane.org> (raw)
In-Reply-To: <CAEoi9W4eD8AF=FwjMT-KPRfyYgD+qgVvE1u3sBwiovm4=1WWLg@mail.gmail.com>
> > At the end of the AOS work circa 1996, most of the kernel was 4.4,
> > except for the network stack which was 4.3-Reno, and the VM system which
> > was still 4.3 (hence no mmap).
>
>
> This happened outside of IBM, didn't it? What prevented the rest of the VM
> code being ported?
Most - if not all - the AOS work was done by Roger Florkowski and Mark
Dapoz, and Roger was definitely working for IBM at that time.
I think time was limiting factor, but also Roger was not really wanting
to port the Mach VM to AOS due to the RT MMU limitations - in
particular, there is no way for multiple virtual addresses to point to
the same page, so you need to keep evicting/switching mappings when you
want a page to be available to the kernel and the currently running
userland process. That was fixed in the POWER MMU.
> I vaguely remember Metaware being somewhat religiously extreme, but again
> the details are fuzzy now. Was there some kind of ecclesiastical reference
> in the man page?
I'm afraid that doesn't ring any bell.
Miod
next prev parent reply other threads:[~2022-05-03 7:42 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-01 9:30 Andrew Warkentin
2022-05-01 11:43 ` Ron Natalie
2022-05-01 11:56 ` Rob Pike
2022-05-01 14:03 ` Kenneth Goodwin
2022-05-03 4:37 ` Jim Carpenter
2022-05-01 14:09 ` Kenneth Goodwin
2022-05-01 18:08 ` ron minnich
2022-05-01 18:22 ` Charles H Sauer (he/him)
2022-05-01 19:49 ` Dan Stromberg
2022-05-01 20:37 ` Charles H Sauer (he/him)
2022-05-02 2:08 ` Kenneth Goodwin
2022-05-02 9:21 ` Dr Iain Maoileoin
2022-05-02 20:19 ` Rich Morin
2022-05-02 21:30 ` Clem Cole
2022-05-02 21:36 ` Dan Cross
2022-05-10 15:28 ` Mary Ann Horton
2022-05-10 16:08 ` Warner Losh
2022-05-10 16:40 ` Heinz Lycklama
2022-05-10 16:42 ` James Frew
2022-05-14 2:56 ` Mary Ann Horton
2022-05-10 16:59 ` Clem Cole
2022-05-10 17:18 ` Clem Cole
2022-05-10 18:05 ` Charles H Sauer (he/him)
2022-05-10 19:27 ` Lars Brinkhoff
2022-05-10 19:08 ` Henry Bent
2022-05-10 19:33 ` Richard Salz
2022-05-10 20:18 ` Ronald Natalie
2022-05-11 16:20 ` James Frew
2022-05-11 16:51 ` Paul Winalski
2022-05-10 20:28 ` Henry Bent
2022-05-10 20:43 ` Warner Losh
2022-05-10 20:46 ` Clem Cole
2022-05-11 16:44 ` Paul Winalski
2022-05-11 17:09 ` Clem Cole
2022-05-11 17:35 ` Larry McVoy
2022-05-12 0:16 ` George Michaelson
2022-05-13 2:46 ` Adam Thornton
2022-05-15 0:48 ` Larry McVoy
2022-05-15 5:36 ` Adam Thornton
2022-05-15 13:37 ` Larry McVoy
2022-05-12 5:22 ` Warner Losh
2022-05-12 12:06 ` Ron Natalie
2022-05-12 12:43 ` John Cowan
2022-05-15 2:00 ` Stuart Remphrey
2022-05-02 2:42 ` Phil Budne
2022-05-02 6:46 ` Ron Natalie
2022-05-02 13:50 ` Clem Cole
2022-05-02 14:46 ` tytso
2022-05-02 15:38 ` Clem Cole
2022-05-02 20:31 ` Warner Losh
2022-05-03 5:01 ` tytso
2022-05-03 11:35 ` Richard Salz
2022-05-02 23:30 ` Gregg Levine
[not found] ` <CAK7dMtD08weh+97mx+ncrq0cxprKgke42C0vFYNPnBkd8Fx9Sg@mail.gmail.com>
2022-05-03 7:28 ` Ronald Natalie
2022-05-02 12:59 ` Kenneth Goodwin
2022-05-02 14:13 ` Richard Salz
2022-05-02 13:14 ` tytso
2022-05-02 13:32 ` Larry McVoy
2022-05-02 13:16 ` Dan Cross
2022-05-02 14:14 ` Miod Vallat
2022-05-02 14:50 ` ron minnich
2022-05-02 16:13 ` Al Kossow
2022-05-02 18:46 ` Miod Vallat
2022-05-02 19:54 ` Chet Ramey
2022-05-02 21:17 ` Dan Cross
2022-05-02 23:49 ` George Michaelson
2022-05-03 7:22 ` Ronald Natalie
2022-05-03 7:40 ` Miod Vallat [this message]
2022-05-03 8:03 ` Ron Natalie
[not found] ` <CAEoi9W4eD8AF=FwjMT-KPRfyYgD+qgVvE1u3sBwiovm4=1WWLg@mail.g mail.com>
2022-05-03 12:14 ` John Foust via TUHS
2022-05-01 20:55 ` Michael Huff
2022-05-03 4:55 ` Jim Carpenter
2022-05-02 15:43 ` Clem Cole
2022-05-02 16:16 ` Bakul Shah
2022-05-02 16:19 ` Bakul Shah
2022-05-02 17:14 ` Clem Cole
2022-05-02 16:29 ` Larry McVoy
2022-05-02 17:42 ` Clem Cole
2022-05-02 17:59 ` Bakul Shah
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