From: Larry McVoy <lm@mcvoy.com>
To: The Unix Heritage Society mailing list <tuhs@tuhs.org>
Subject: Re: [TUHS] Systematic approach to command-line interfaces
Date: Tue, 28 Sep 2021 11:10:16 -0700 [thread overview]
Message-ID: <20210928181016.GN18305@mcvoy.com> (raw)
In-Reply-To: <m1mVHBR-0036wTC@more.local>
On Tue, Sep 28, 2021 at 10:46:25AM -0700, Greg A. Woods wrote:
> The "unix" nod to
> single level storage by way of mmap() suffers from horribly bad design
> and neglect.
I supported Xerox PARC when they were redoing their OS as a user space
application on SunOS 4.x. They used mmap() and protections to take
user level page faults. Yeah, there were bugs but that was ~30 years
ago.
In more recent times, BitKeeper used mmap() and protections to take the
same page faults (we implemented a compressed, XORed file storage that
filled in "pages" on demand, it was a crazy performance improvement)
and that worked on pretty much every Unix we tried it on. Certainly
worked on Linux first try.
So what is it about mmap you don't like?
next prev parent reply other threads:[~2021-09-28 18:10 UTC|newest]
Thread overview: 100+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-31 12:25 Michael Siegel
2021-07-31 13:05 ` Dan Halbert
2021-07-31 14:21 ` Adam Thornton
2021-07-31 14:25 ` Adam Thornton
2021-07-31 15:45 ` Richard Salz
2021-07-31 16:03 ` Clem Cole
2021-07-31 16:06 ` Richard Salz
2021-07-31 16:21 ` Clem Cole
2021-07-31 16:17 ` Clem Cole
2021-07-31 16:30 ` Dan Cross
2021-07-31 15:56 ` Paul Winalski
2021-07-31 16:19 ` Dan Cross
2021-08-01 17:44 ` Chet Ramey
2021-08-01 21:53 ` Dan Cross
2021-08-01 23:21 ` Chet Ramey
2021-08-01 23:36 ` John Cowan
2021-08-01 23:49 ` Larry McVoy
2021-08-02 0:28 ` Larry McVoy
2021-08-01 23:58 ` Dan Cross
2021-08-02 0:29 ` Steve Nickolas
2021-08-02 0:13 ` Andrew Warkentin
2021-08-02 0:18 ` John Cowan
2021-08-02 0:54 ` Andrew Warkentin
2021-08-02 1:04 ` Dan Cross
2021-08-02 1:05 ` Theodore Ts'o
2021-08-02 2:10 ` Andrew Warkentin
2021-08-02 2:32 ` Bakul Shah
2021-08-02 17:33 ` Lars Brinkhoff
2021-09-28 17:46 ` Greg A. Woods
2021-09-28 18:10 ` Larry McVoy [this message]
2021-09-29 16:40 ` Greg A. Woods
2021-09-29 16:57 ` Larry McVoy
2021-09-30 17:31 ` Greg A. Woods
2021-09-29 23:10 ` Phil Budne
2021-08-02 17:37 ` Lars Brinkhoff
2021-08-02 18:52 ` Clem Cole
2021-08-02 20:59 ` John Cowan
2021-08-02 21:06 ` Al Kossow
2021-08-02 21:14 ` Clem Cole
2021-08-02 21:13 ` Clem Cole
2021-08-01 16:51 ` Michael Siegel
2021-08-01 17:31 ` Jon Steinhart
2021-07-31 16:41 ` Clem Cole
2021-07-31 17:41 ` John Cowan
2021-07-31 17:30 ` Anthony Martin
2021-07-31 17:46 ` John Cowan
2021-07-31 18:56 ` Michael Siegel
2021-07-31 19:41 ` Clem Cole
2021-07-31 21:30 ` Michael Siegel
2021-08-01 17:48 ` Chet Ramey
2021-08-01 19:23 ` Richard Salz
2021-08-01 23:26 ` Chet Ramey
2021-07-31 19:20 ` [TUHS] Systematic approach to command-line interfaces [ meta issues ] Jon Steinhart
2021-07-31 21:06 ` Richard Salz
2021-07-31 21:32 ` Jon Steinhart
2021-07-31 21:37 ` Richard Salz
2021-07-31 21:55 ` Jon Steinhart
2021-07-31 22:10 ` Warner Losh
2021-07-31 22:19 ` Larry McVoy
2021-07-31 22:20 ` Jon Steinhart
2021-07-31 23:26 ` Warner Losh
2021-07-31 23:41 ` Jon Steinhart
2021-07-31 22:04 ` Bakul Shah
2021-07-31 22:13 ` Larry McVoy
2021-07-31 22:14 ` Bakul Shah
2021-07-31 22:17 ` Bakul Shah
2021-07-31 22:16 ` Jon Steinhart
2021-07-31 22:20 ` Bakul Shah
2021-07-31 16:27 [TUHS] Systematic approach to command-line interfaces Nelson H. F. Beebe
2021-07-31 16:47 Ron Young
2021-08-02 2:34 ` Jim Carpenter
2021-08-02 2:38 ` Ron Young
2021-08-02 2:42 Douglas McIlroy
2021-08-02 14:58 ` Theodore Ts'o
2021-08-02 18:15 ` Adam Thornton
2021-08-02 18:24 ` Warner Losh
2021-08-02 20:55 ` John Cowan
2021-08-02 21:06 ` Jon Steinhart
2021-08-02 21:25 ` Dan Cross
2021-08-02 21:59 ` Jon Steinhart
2021-08-02 22:33 ` John Cowan
2021-08-03 0:21 ` Bakul Shah
2021-08-03 1:49 ` Jon Steinhart
2021-08-03 3:21 ` Adam Thornton
2021-08-03 3:27 ` Bakul Shah
2021-08-03 3:51 ` Jon Steinhart
2021-08-03 7:19 ` arnold
2021-08-03 23:12 ` Andrew Warkentin
2021-08-04 15:04 ` Paul Winalski
2021-08-03 15:01 Douglas McIlroy
2021-08-03 17:13 ` Tom Lyon via TUHS
2021-08-11 18:11 ` Tom Ivar Helbekkmo via TUHS
2021-08-11 21:24 ` Tom Lyon via TUHS
2021-08-03 19:12 Douglas McIlroy
2021-09-28 18:15 Noel Chiappa
2021-09-29 18:07 Noel Chiappa
2021-09-29 19:04 ` Dan Cross
2021-09-29 19:12 ` Larry McVoy
2021-09-30 11:41 Douglas McIlroy
2021-10-01 12:11 Paul Ruizendaal
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