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From: erik quanstrom <quanstro@quanstro.net>
To: 9fans@9fans.net
Subject: Re: [9fans] syscall 53
Date: Mon, 19 May 2014 16:51:48 -0400	[thread overview]
Message-ID: <3b6bd7be273cb91515d8ededd002a3e4@ivey> (raw)
In-Reply-To: <CAEAzY3-4sG5i+ko-ctd9HSod=rhWaqDTOzuS9yG3x0BNuhnh7Q@mail.gmail.com>

> There was another complaint about /dev/bintime. Some people claimed
> that using it leaked file descriptors in multithreaded programs. I
> don't understand why this problem can't be solved by opening it
> close-on-exec. In fact, this problem doesn't exist in the port of
> Go to Plan 9 anymore (although the fix was different)...

close-on-exec doesn't solve any interesting issues.  close on fork might,
but we don't have that.

if two threads share memory, but do not share file descriptor tables, or
if you overflow the file descriptor array, you're really cooked.  things go
seriously wrong in a hurry.

there are other cases that are really terrible, but this is the most glaring one.

- erik



  parent reply	other threads:[~2014-05-19 20:51 UTC|newest]

Thread overview: 117+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-05-17 19:11 goo
2014-05-17 21:17 ` Jeff Sickel
2014-05-17 22:21   ` Jeff Sickel
2014-05-17 22:45   ` Skip Tavakkolian
2014-05-18  4:34     ` lucio
2014-05-18  8:29       ` David du Colombier
2014-05-18 15:28         ` Jeff Sickel
2014-05-18 15:32         ` Skip Tavakkolian
2014-05-18 15:34           ` Skip Tavakkolian
2014-05-18 15:38           ` Jeff Sickel
2014-05-18 16:03             ` Skip Tavakkolian
2014-05-18 22:55               ` Skip Tavakkolian
2014-05-19  1:54                 ` erik quanstrom
2014-05-19  2:27                   ` Jeff Sickel
2014-05-19  4:18                     ` lucio
2014-05-19 12:50                       ` erik quanstrom
2014-05-19 14:01                         ` lucio
2014-05-19 16:24                           ` erik quanstrom
2014-05-19 16:54                             ` erik quanstrom
2014-05-19 17:16                               ` lucio
2014-05-19 17:22                                 ` erik quanstrom
2014-05-19 17:13                             ` lucio
2014-05-19 17:25                               ` erik quanstrom
2014-05-19 19:50                                 ` Bakul Shah
2014-05-19 19:59                                   ` erik quanstrom
2014-05-19 20:54                                     ` ron minnich
2014-05-19 21:30                                       ` Charles Forsyth
2014-05-19 21:41                                         ` ron minnich
2014-05-19 23:02                                           ` Kurt H Maier
2014-05-19 23:06                                             ` andrey mirtchovski
2014-05-19 23:12                                               ` Kurt H Maier
2014-05-19 23:17                                                 ` andrey mirtchovski
2014-05-20  0:09                                                   ` Jeff Sickel
2014-05-19 21:34                                       ` Anthony Sorace
2014-05-20 14:04                                         ` erik quanstrom
2014-05-20 16:41                                           ` ron minnich
2014-05-20 17:14                                             ` erik quanstrom
2014-05-20 18:32                                             ` Kurt H Maier
2014-05-20 19:49                                               ` ron minnich
2014-05-20 19:54                                                 ` erik quanstrom
2014-05-20 20:06                                                 ` Kurt H Maier
2014-05-21 10:23                                                 ` hiro
2014-05-20 20:33                                             ` Jeff Sickel
2014-05-21  1:37                                               ` Skip Tavakkolian
2014-05-21 15:40                                                 ` lucio
2014-05-21 16:25                                                   ` erik quanstrom
2014-05-21 16:56                                                     ` Skip Tavakkolian
2014-05-21 20:05                                                       ` Steffen Nurpmeso
2014-05-22  0:13                                                       ` Bakul Shah
2014-05-22  3:25                                                         ` [9fans] CMS/MMS (VCS/SCM/DSCM) [was: syscall 53] Jeff Sickel
2014-05-22  5:03                                                           ` lucio
2014-05-22  5:07                                                           ` lucio
2014-05-22 13:29                                                             ` erik quanstrom
2014-05-22 13:50                                                               ` lucio
2014-05-22  5:11                                                           ` Bakul Shah
2014-05-22  5:26                                                             ` lucio
2014-05-22 12:57                                                               ` erik quanstrom
2014-05-22 13:43                                                                 ` lucio
2014-05-22 13:57                                                                   ` erik quanstrom
2014-05-22  5:28                                                             ` lucio
2014-05-22  5:36                                                             ` lucio
2014-05-22  6:00                                                               ` Bakul Shah
2014-05-22  6:18                                                                 ` lucio
2014-05-22 12:45                                                                 ` erik quanstrom
2014-05-22 20:05                                                                   ` Bakul Shah
2014-05-22 20:11                                                                     ` erik quanstrom
2014-05-23 20:07                                                                     ` Steve Simon
2014-05-22  9:52                                                               ` Aram Hăvărneanu
2014-05-22 10:29                                                                 ` lucio
2014-05-22 10:46                                                                   ` Aram Hăvărneanu
2014-05-22 13:03                                                             ` erik quanstrom
2014-05-22  5:23                                                           ` Skip Tavakkolian
2014-05-22  5:47                                                             ` lucio
2014-05-22 12:49                                                               ` erik quanstrom
2014-05-22  7:49                                                           ` Alex Jordan
2014-05-22 12:49                                                             ` Riddler
2014-05-22  3:43                                                       ` [9fans] syscall 53 Kurt H Maier
2014-05-22  5:12                                                         ` lucio
2014-05-22 16:15                                                           ` Kurt H Maier
2014-05-22  5:36                                                         ` Bakul Shah
2014-05-22 10:50                                                           ` Aram Hăvărneanu
2014-05-21 17:01                                                     ` lucio
2014-05-21 17:41                                                       ` erik quanstrom
2014-05-21 19:08                                                         ` lucio
2014-05-21 20:36                                                           ` erik quanstrom
2014-05-22  4:46                                                             ` lucio
2014-05-22 13:18                                                               ` erik quanstrom
2014-05-22 13:39                                                                 ` lucio
2014-05-22 14:22                                                                   ` Riddler
2014-05-22  4:54                                                             ` lucio
2014-05-22 13:07                                                               ` erik quanstrom
2014-05-21  1:21                                             ` Skip Tavakkolian
2014-05-21 15:36                                               ` lucio
2014-05-21 15:57                                                 ` erik quanstrom
2014-05-21 17:03                                                   ` lucio
2014-05-21 16:50                                                 ` Kurt H Maier
2014-05-21 18:02                                                   ` hiro
2014-05-20 17:05                                         ` Bakul Shah
2014-05-20 17:28                                           ` erik quanstrom
2014-05-19 17:26                               ` Charles Forsyth
2014-05-19 17:29                                 ` erik quanstrom
2014-05-19 19:15                                   ` Aram Hăvărneanu
2014-05-19 19:44                                     ` Charles Forsyth
2014-05-19 20:51                                     ` erik quanstrom [this message]
2014-05-20  3:52                                     ` cinap_lenrek
2014-05-19  4:15                   ` lucio
2014-05-18  0:34 ` erik quanstrom
  -- strict thread matches above, loose matches on Subject: below --
2014-05-21 18:26 sl
2014-05-21 18:31 ` erik quanstrom
2014-05-18  7:35 goo
2014-05-17 16:54 goo
2014-05-17 13:53 goo
2014-05-17 14:56 ` erik quanstrom
2014-05-17 10:23 goo
2014-05-17 12:11 ` erik quanstrom
2014-05-17 12:23   ` David du Colombier
2014-05-17 12:12 ` erik quanstrom

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