From: Warner Losh <imp@bsdimp.com>
To: Larry McVoy <lm@mcvoy.com>
Cc: TUHS main list <tuhs@minnie.tuhs.org>
Subject: Re: [TUHS] SunOS code?
Date: Fri, 31 Aug 2018 16:02:26 -0600 [thread overview]
Message-ID: <CANCZdfrharMj3kHLvCZHTrrMS=C71tx9VHgC15_ubLRARqch8g@mail.gmail.com> (raw)
In-Reply-To: <20180831215854.GB28971@mcvoy.com>
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On Fri, Aug 31, 2018 at 3:59 PM Larry McVoy <lm@mcvoy.com> wrote:
> A bunch of people stuck around and tried, they really did and I applaud
> them for it but the damage was done. I was gone by the time ZFS came out
> so I have no idea how that passed through the formal vetting process that
> Sun had in place. When I was there, if I had proposed a file system that
> wouldn't use the page cache, you'd have to copy from the buffer cache
> into the page cache to get mmap to work, I would have been kicked out
> of the room and probably kicked out of the kernel group. We had spent
> SO FRIGGING MUCH TIME getting rid of the buffer cache, precisely because
> trying to maintain coherency between the page cache (mmap) and the buffer
> cache (read/write), it was clear that you wanted a unified model.
>
It's reason #1 why Netflix can't use ZFS: the double copy problem...
Warner
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next prev parent reply other threads:[~2018-08-31 22:02 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-30 21:34 Noel Chiappa
2018-08-31 1:59 ` Kevin Bowling
2018-08-31 21:34 ` Cág
2018-08-31 21:39 ` Clem Cole
2018-08-31 21:47 ` Arthur Krewat
2018-08-31 21:57 ` Warner Losh
2018-08-31 21:58 ` Larry McVoy
2018-08-31 22:02 ` Warner Losh [this message]
2018-08-31 22:19 ` Cág
2018-08-31 22:23 ` Jon Forrest
2018-08-31 22:30 ` Cág
2018-08-31 22:34 ` Jon Forrest
2018-09-01 10:46 ` Donald ODona
2018-08-31 22:20 ` Cág
2018-08-31 23:02 ` Arthur Krewat
2018-09-01 1:57 ` Larry McVoy
2018-09-01 3:23 ` Theodore Y. Ts'o
2018-09-01 16:29 ` Kevin Bowling
2018-09-01 16:35 ` Larry McVoy
2018-09-01 19:32 ` Clem Cole
2018-09-01 16:27 ` Kevin Bowling
2018-09-01 17:17 ` Arthur Krewat
2018-09-01 22:19 ` Theodore Y. Ts'o
2018-09-02 5:05 ` Kevin Bowling
2018-09-02 19:43 ` Theodore Y. Ts'o
2018-09-04 11:47 ` Kevin Bowling
2018-09-04 17:39 ` Gilles Gravier
2018-09-04 17:45 ` Henry Bent
2018-09-05 6:31 ` Gilles Gravier
2018-09-05 12:55 ` Arthur Krewat
2018-09-05 15:26 ` Warner Losh
2018-09-05 15:36 ` Chet Ramey
2018-09-05 15:43 ` Arthur Krewat
2018-09-05 23:40 ` Dave Horsfall
2018-09-06 3:21 ` [TUHS] Mail etiquette (was: SunOS code?) Greg 'groggy' Lehey
2018-09-05 0:10 ` [TUHS] SunOS code? Tony Finch
-- strict thread matches above, loose matches on Subject: below --
2018-09-04 17:58 Noel Chiappa
2018-09-06 0:39 ` Dave Horsfall
2018-08-30 19:54 Noel Chiappa
2018-08-30 20:05 ` Earl Baugh
2018-08-30 19:41 Noel Chiappa
2018-08-30 19:46 ` Larry McVoy
2018-08-30 20:04 ` Warner Losh
2018-08-30 20:22 ` Larry McVoy
2018-08-30 20:33 ` Clem Cole
2018-08-30 20:36 ` Larry McVoy
2018-08-30 20:40 ` Clem Cole
2018-08-30 20:43 ` Larry McVoy
2018-08-30 20:38 ` Warner Losh
2018-08-30 20:42 ` Larry McVoy
2018-08-30 20:43 ` Clem Cole
2018-08-30 20:37 ` Clem Cole
2018-08-31 5:49 ` Lars Brinkhoff
2018-08-31 9:50 ` Dave Horsfall
2018-08-31 11:01 ` Gregg Levine
2018-08-31 11:05 ` Lars Brinkhoff
2018-08-24 15:13 [TUHS] Research UNIX on the AT&T 3B2? Seth Morabito
2018-08-24 16:06 ` Clem Cole
2018-08-27 15:54 ` Mary Ann Horton
2018-08-27 17:33 ` Clem Cole
2018-08-28 0:24 ` Dave Horsfall
2018-08-28 0:30 ` Larry McVoy
2018-08-28 6:01 ` arnold
2018-08-28 22:33 ` Dave Horsfall
2018-08-29 0:36 ` Harald Arnesen
2018-08-29 0:46 ` Larry McVoy
2018-08-29 5:29 ` [TUHS] SunOS code? arnold
2018-08-29 14:40 ` Larry McVoy
2018-08-29 14:41 ` Dan Cross
2018-08-29 14:44 ` William Pechter
2018-08-29 14:46 ` Warner Losh
2018-08-29 14:45 ` Clem Cole
2018-08-29 14:43 ` Warner Losh
2018-08-29 14:45 ` Warner Losh
2018-08-29 14:53 ` Larry McVoy
2018-09-01 11:43 ` Steve Mynott
2018-09-01 13:50 ` Andy Kosela
2018-09-01 14:32 ` Warner Losh
2018-09-04 9:39 ` Andy Kosela
2018-09-01 15:01 ` Larry McVoy
2018-09-01 15:20 ` Warner Losh
2018-09-01 18:24 ` Steve Mynott
2018-09-01 18:38 ` Larry McVoy
2018-08-29 23:09 ` David Arnold
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