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From: Ulrich Drepper <drepper@redhat.com>
To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: Davide Libenzi <davidel@xmailserver.org>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Ingo Molnar <mingo@elte.hu>, Eric Dumazet <dada1@cosmosbay.com>
Subject: Re: [patch 7/8] fdmap v2 - implement sys_socket2
Date: Wed, 06 Jun 2007 16:22:37 -0700	[thread overview]
Message-ID: <466741BD.20106@redhat.com> (raw)
In-Reply-To: <20070607001932.35c9591c@the-village.bc.nu>

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Alan Cox wrote:
> Linking to the correct version of a libary and getting the library
> versioning right is not rocket science and isn't a sane excuse. Its no
> different to the stdio to large fd migration issues with many Unixen and
> they all coped just fine.

This has nothing to do with linking and ABI.  The assumptions about
continuous allocation are part of the API.  It's required by POSIX and
provided by Unix since the early days.  There are entire code bases out
there which depend on this assumption.  Linking with code like this,
before or after the new version controlled symbol is introduced, will
break it.  Policies or stateful behavior, however yo want to call it, is
just plain wrong for this (and most other things).

- --
➧ Ulrich Drepper ➧ Red Hat, Inc. ➧ 444 Castro St ➧ Mountain View, CA ❖
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  reply	other threads:[~2007-06-06 23:23 UTC|newest]

Thread overview: 129+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-06-06 22:30 [patch 7/8] fdmap v2 - implement sys_socket2 Davide Libenzi
2007-06-06 22:44 ` David Miller
2007-06-06 22:52   ` Davide Libenzi
2007-06-06 22:57     ` David Miller
2007-06-06 22:57   ` Ulrich Drepper
2007-06-06 23:02     ` David Miller
2007-06-06 22:59 ` Alan Cox
2007-06-06 22:58   ` Ulrich Drepper
2007-06-06 23:04   ` Davide Libenzi
2007-06-06 23:08     ` David Miller
2007-06-06 23:19     ` Alan Cox
2007-06-06 23:22       ` Ulrich Drepper [this message]
2007-06-07 10:04         ` Alan Cox
2007-06-07 11:59           ` Kyle Moffett
2007-06-07 13:12             ` Eric Dumazet
2007-06-07 15:51               ` Davide Libenzi
2007-06-07 19:49               ` Davide Libenzi
2007-06-07 20:02                 ` Ulrich Drepper
2007-06-07 20:05                 ` Eric Dumazet
2007-06-07 20:18                   ` Ulrich Drepper
2007-06-07 21:44                     ` Davide Libenzi
2007-06-07 22:03                       ` Ulrich Drepper
2007-06-07 22:40                         ` Davide Libenzi
2007-06-08 12:07                           ` Theodore Tso
2007-06-08 13:01                             ` Alan Cox
2007-06-08 18:11                               ` Davide Libenzi
2007-06-08 18:26                                 ` Alan Cox
2007-06-08 18:43                                   ` Ulrich Drepper
2007-06-08 18:46                                     ` Al Viro
2007-06-08 18:56                                       ` Ulrich Drepper
2007-06-08 19:07                                         ` Linus Torvalds
2007-06-08 19:21                                           ` Davide Libenzi
2007-06-09  0:03                                             ` Linus Torvalds
2007-06-09  0:13                                               ` Davide Libenzi
2007-06-09  0:36                                               ` Al Viro
2007-06-09  1:19                                                 ` Ulrich Drepper
2007-06-09  1:41                                                   ` Al Viro
2007-06-09  2:10                                                     ` Ulrich Drepper
2007-06-09 15:15                                                       ` Al Viro
2007-06-09 16:26                                                         ` Ulrich Drepper
2007-06-09 16:54                                                           ` Al Viro
2007-06-09 17:04                                                             ` Davide Libenzi
2007-06-09 17:08                                                               ` Davide Libenzi
2007-06-09 17:08                                                             ` Ulrich Drepper
2007-06-09 17:24                                                               ` Al Viro
2007-06-09 19:27                                                                 ` Kyle Moffett
2007-06-09 20:06                                                                   ` Al Viro
2007-06-09 20:21                                                                     ` Linus Torvalds
2007-06-09 20:31                                                                       ` Davide Libenzi
2007-06-09 21:41                                                                         ` Matt Mackall
2007-06-09 22:12                                                                           ` Davide Libenzi
2007-06-09 20:49                                                                       ` Al Viro
2007-06-09 21:55                                                                         ` Matt Mackall
2007-06-09 23:33                                                                         ` Linus Torvalds
2007-06-10  3:35                                                                           ` Davide Libenzi
2007-06-10  3:49                                                                             ` Davide Libenzi
2007-06-10  3:19                                                                       ` Al Viro
2007-06-10  3:48                                                                         ` Linus Torvalds
2007-06-10  4:00                                                                           ` Al Viro
2007-06-10  4:03                                                                             ` Linus Torvalds
2007-06-10  4:06                                                                               ` Al Viro
2007-06-10  4:45                                                                           ` dean gaudet
2007-06-10  5:06                                                                             ` Linus Torvalds
2007-06-10  5:46                                                                               ` Al Viro
2007-06-10 17:23                                                                                 ` Linus Torvalds
2007-06-10  6:35                                                                           ` Kari Hurtta
2007-06-10 15:21                                                                             ` Alan Cox
2007-06-10  9:14                                                                       ` Eric Dumazet
2007-06-10 15:16                                                                         ` Alan Cox
2007-06-10 18:19                                                                         ` Linus Torvalds
2007-06-10  2:40                                                                   ` Al Viro
2007-06-08 19:34                                         ` Alan Cox
2007-06-08 19:30                                     ` Alan Cox
2007-06-08 19:37                                       ` Davide Libenzi
2007-06-08 19:48                                         ` Alan Cox
2007-06-08 19:51                                           ` Davide Libenzi
2007-06-08 21:24                                             ` Alan Cox
2007-06-08 21:59                                               ` Davide Libenzi
2007-06-08 22:28                                                 ` Alan Cox
2007-06-08 22:38                                                   ` Davide Libenzi
2007-06-11  8:24                                       ` Xavier Bestel
2007-06-08 19:22                                   ` Davide Libenzi
2007-06-09  5:41                                 ` Paul Mackerras
2007-06-09 14:38                                   ` Kyle Moffett
2007-06-10  6:48                                     ` Paul Mackerras
2007-06-10 15:56                                       ` Davide Libenzi
2007-06-10 19:16                                       ` Davide Libenzi
2007-06-09 17:00                                   ` Davide Libenzi
2007-06-10  6:26                                     ` Paul Mackerras
2007-06-10  7:10                                       ` William Lee Irwin III
2007-06-10 15:52                                       ` Davide Libenzi
2007-06-08 18:07                             ` Davide Libenzi
2007-06-08 18:35                             ` Linus Torvalds
2007-06-07 21:57                   ` Davide Libenzi
2007-06-08  4:38                     ` Eric Dumazet
2007-06-08  5:20                       ` Davide Libenzi
2007-06-07 14:25           ` Ulrich Drepper
2007-06-07 17:56             ` Eric Dumazet
2007-06-07 18:03               ` Davide Libenzi
2007-06-07 18:57                 ` Eric Dumazet
2007-06-07 18:26               ` Ulrich Drepper
2007-06-07 18:39                 ` Davide Libenzi
2007-06-07 18:56                   ` Ulrich Drepper
2007-06-07 19:12                     ` Davide Libenzi
2007-06-07 20:03                   ` Andrew Morton
2007-06-08  2:55                     ` Ulrich Drepper
2007-06-08  5:16                       ` Davide Libenzi
2007-06-06 23:29       ` Davide Libenzi
2007-06-07 10:06         ` Alan Cox
2007-06-07 10:45           ` Eric Dumazet
2007-06-07 11:27             ` Alan Cox
2007-06-07 15:41           ` Davide Libenzi
2007-06-07 20:10   ` Linus Torvalds
2007-06-07 20:47     ` Eric Dumazet
2007-06-07 21:08       ` Linus Torvalds
2007-06-07 21:41         ` Davide Libenzi
2007-06-07 20:59     ` Guillaume Chazarain
2007-06-07 21:06       ` Guillaume Chazarain
2007-06-07 21:31     ` Ulrich Drepper
2007-06-07 22:22     ` Davide Libenzi
2007-06-07 23:42       ` Linus Torvalds
2007-06-08  0:04         ` Davide Libenzi
2007-06-08  0:59     ` Matt Mackall
2007-06-08  2:25       ` Linus Torvalds
2007-06-08 15:56     ` Jeff Dike
2007-06-07  0:29 ` Arnd Bergmann
2007-06-07  0:33   ` Davide Libenzi
  -- strict thread matches above, loose matches on Subject: below --
2007-06-06 22:30 [patch 1/8] fdmap v2 - fdmap core Davide Libenzi
2007-06-07  6:54 ` Eric Dumazet
2007-06-07  7:10   ` Davide Libenzi
2007-06-07 10:39     ` [patch 7/8] fdmap v2 - implement sys_socket2 Eric Dumazet
2007-06-07 15:42       ` Davide Libenzi

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