From: Michael Mol <mikemol@gmail.com>
To: gentoo-user@lists.gentoo.org
Subject: Re: [gentoo-user] udev + /usr
Date: Thu, 15 Sep 2011 11:37:42 -0400 [thread overview]
Message-ID: <CA+czFiBBj6ake7Lsp=By6zW6_jzGHFaEJRaiHup0=g8QHdCPwA@mail.gmail.com> (raw)
In-Reply-To: <1770201.esc5b3VgKV@pc>
On Thu, Sep 15, 2011 at 11:16 AM, Michael Schreckenbauer <grimlog@gmx.de> wrote:
> On Thursday, 15. September 2011 11:03:09 Michael Mol wrote:
>> > Yes, except that udev ONLY handles kernel-events and doesn't process any
>> > "actions" itself.
>> > These are placed on a seperate queue for a seperate process.
>>
>> The problem with this is that you now need to manage synchronization
>> between the kernel event processor and the action processor, which is
>> actually more complicated than keeping them together in a
>> single-threaded, single-process scenario.
>
> Yes, it's more complicated to do. But not impossible.
> IPC, shared memory and what not, exists for a reason
Sure. But it's not KISS, it's not necessary and it's a royal PITA. One
of queued tasks here at work is debugging _exactly_ that kind of code.
You need a _very_ good reason to use it, because it doesn't make any
solution more elegant.
I don't see a pragmatic value to splitting the process. At work, I
have to do it because it links to badly-written crash-prone code I
can't fix. If I can reasonably guarantee that the code I need to run
will behave, then the overhead and complexity definitely doesn't seem
worthwhile.
And because I've sat on two sides of the KISS argument in as many
messages, I'd like to make some points clear:
* The udev tool needs to be reliable, and this means no complexity
unnecessary to fulfilling its role. However...
* Part of udev's role needs to be *not* impose constraints on a system
without a clear path to get from point A to point B; as long an API is
understood, someone plugging into udev should be able to find a way to
reliably do what they want to do.
--
:wq
next prev parent reply other threads:[~2011-09-15 15:39 UTC|newest]
Thread overview: 254+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-09-12 15:02 [gentoo-user] udev + /usr Alan Mackenzie
2011-09-12 15:33 ` Michael Schreckenbauer
2011-09-12 17:17 ` Alan Mackenzie
2011-09-12 17:39 ` Michael Mol
2011-09-12 18:08 ` Michael Schreckenbauer
2011-09-12 18:37 ` Canek Peláez Valdés
2011-09-12 19:00 ` Michael Mol
2011-09-12 19:35 ` Canek Peláez Valdés
2011-09-12 19:52 ` Michael Mol
2011-09-12 20:24 ` Alex Schuster
2011-09-13 7:08 ` Joost Roeleveld
2011-09-12 20:31 ` Alan Mackenzie
2011-09-13 3:18 ` Peter Humphrey
2011-09-13 7:15 ` Joost Roeleveld
2011-09-13 7:01 ` Paul Colquhoun
2011-09-13 18:15 ` Dale
2011-09-12 20:16 ` David W Noon
2011-09-12 19:07 ` Michael Schreckenbauer
2011-09-12 19:18 ` Michael Mol
2011-09-12 19:41 ` Michael Schreckenbauer
2011-09-12 20:07 ` Michael Mol
2011-09-12 20:57 ` Alan McKinnon
2011-09-12 22:00 ` Michael Schreckenbauer
2011-09-12 23:31 ` Canek Peláez Valdés
2011-09-13 7:28 ` Joost Roeleveld
2011-09-13 8:52 ` Michael Schreckenbauer
2011-09-12 21:14 ` Pandu Poluan
2011-09-13 2:07 ` Walter Dnes
2011-09-13 7:25 ` Joost Roeleveld
2011-09-12 19:56 ` Dale
2011-09-13 3:28 ` Walter Dnes
2011-09-13 7:04 ` Neil Bothwick
2011-09-13 15:21 ` Walter Dnes
2011-09-13 15:38 ` Michael Schreckenbauer
2011-09-13 15:49 ` Neil Bothwick
2011-09-13 16:56 ` Joost Roeleveld
2011-09-12 17:50 ` Michael Schreckenbauer
2011-09-13 14:40 ` Alan Mackenzie
2011-09-13 14:55 ` Michael Schreckenbauer
2011-09-13 15:38 ` Alan Mackenzie
2011-09-13 16:14 ` Canek Peláez Valdés
2011-09-13 20:35 ` Alan McKinnon
2011-09-13 20:52 ` Canek Peláez Valdés
2011-09-13 20:57 ` Michael Mol
2011-09-13 21:10 ` Canek Peláez Valdés
2011-09-13 21:30 ` Michael Schreckenbauer
2011-09-13 21:53 ` Canek Peláez Valdés
2011-09-13 22:10 ` Michael Schreckenbauer
2011-09-13 22:33 ` Canek Peláez Valdés
2011-09-14 5:52 ` Joost Roeleveld
2011-09-14 14:30 ` Canek Peláez Valdés
2011-09-14 18:36 ` Dale
2011-09-14 18:55 ` Canek Peláez Valdés
2011-09-14 23:06 ` William Kenworthy
2011-09-15 0:00 ` Dale
2011-09-15 20:42 ` Mike Edenfield
2011-09-15 21:01 ` Michael Mol
2011-09-15 21:16 ` Joost Roeleveld
2011-09-15 21:28 ` Canek Peláez Valdés
2011-09-15 22:05 ` Mike Edenfield
2011-09-15 22:26 ` Mark Knecht
2011-09-15 22:44 ` Canek Peláez Valdés
2011-09-16 8:46 ` Joost Roeleveld
2011-09-16 10:00 ` Alan McKinnon
2011-09-16 10:54 ` Joost Roeleveld
2011-09-16 13:03 ` Alan McKinnon
2011-09-15 7:01 ` Joost Roeleveld
2011-09-15 13:47 ` Michael Mol
2011-09-15 14:11 ` Joost Roeleveld
2011-09-15 14:32 ` Michael Mol
2011-09-15 14:48 ` Joost Roeleveld
2011-09-15 14:58 ` Canek Peláez Valdés
2011-09-15 17:43 ` Canek Peláez Valdés
2011-09-15 21:25 ` Joost Roeleveld
2011-09-15 21:34 ` Canek Peláez Valdés
2011-09-16 8:54 ` Joost Roeleveld
2011-09-18 7:29 ` Walter Dnes
2011-09-15 15:03 ` Michael Mol
2011-09-15 15:16 ` Michael Schreckenbauer
2011-09-15 15:37 ` Michael Mol [this message]
2011-09-15 15:43 ` Joost Roeleveld
2011-09-15 16:16 ` Michael Mol
2011-09-15 16:37 ` Joost Roeleveld
2011-09-15 15:13 ` Michael Schreckenbauer
2011-09-15 17:59 ` Mick
2011-09-15 19:04 ` Canek Peláez Valdés
2011-09-15 19:17 ` Neil Bothwick
2011-09-15 21:30 ` Joost Roeleveld
2011-09-15 21:38 ` Canek Peláez Valdés
2011-09-16 8:59 ` Joost Roeleveld
2011-09-16 9:29 ` Pandu Poluan
2011-09-16 14:57 ` Canek Peláez Valdés
2011-09-16 15:57 ` Dale
2011-09-16 16:11 ` Canek Peláez Valdés
2011-09-16 16:20 ` Mark Knecht
2011-09-16 17:09 ` Dale
2011-09-16 16:21 ` Pandu Poluan
2011-09-17 6:06 ` Joost Roeleveld
2011-09-16 18:45 ` Carlos Hendson
2011-09-19 0:58 ` Walter Dnes
2011-09-15 14:57 ` Canek Peláez Valdés
2011-09-15 15:08 ` Michael Mol
2011-09-15 15:37 ` Joost Roeleveld
2011-09-15 18:15 ` Neil Bothwick
2011-09-15 21:32 ` Joost Roeleveld
2011-09-15 17:37 ` pk
2011-09-15 21:34 ` Joost Roeleveld
2011-09-15 20:05 ` Sebastian Beßler
2011-09-15 20:27 ` Canek Peláez Valdés
2011-09-15 20:53 ` Sebastian Beßler
2011-09-15 21:05 ` Canek Peláez Valdés
2011-09-16 9:08 ` Joost Roeleveld
2011-09-16 14:53 ` Canek Peláez Valdés
2011-09-17 6:45 ` Joost Roeleveld
2011-09-17 7:04 ` Joost Roeleveld
2011-09-17 14:59 ` Canek Peláez Valdés
2011-09-17 12:33 ` Alan McKinnon
2011-09-17 14:50 ` Canek Peláez Valdés
2011-09-17 15:41 ` Michael Mol
2011-09-17 18:36 ` Canek Peláez Valdés
2011-09-17 19:24 ` Michael Mol
2011-09-17 21:13 ` Canek Peláez Valdés
2011-09-18 19:13 ` Neil Bothwick
2011-09-17 23:00 ` Alan McKinnon
2011-09-17 23:31 ` Michael Mol
2011-09-17 23:45 ` Canek Peláez Valdés
2011-09-17 23:50 ` Michael Mol
2011-09-18 7:37 ` Alan McKinnon
2011-09-18 9:23 ` [gentoo-user] [OT rant] " pk
2011-09-18 10:03 ` Volker Armin Hemmann
2011-09-18 10:44 ` pk
2011-09-18 12:32 ` Volker Armin Hemmann
2011-09-18 12:56 ` Alan McKinnon
2011-09-18 16:55 ` pk
2011-09-18 17:41 ` Indi
2011-09-18 18:13 ` pk
2011-09-18 19:08 ` Alan McKinnon
2011-09-18 20:48 ` Volker Armin Hemmann
2011-09-20 0:20 ` Walter Dnes
2011-09-20 16:50 ` Volker Armin Hemmann
2011-09-20 17:10 ` Alex Schuster
2011-09-20 17:28 ` Michael Mol
2011-09-20 17:33 ` Mark Knecht
2011-09-20 17:54 ` Alex Schuster
2011-09-20 17:19 ` Thanasis
2011-09-20 17:30 ` Volker Armin Hemmann
2011-09-21 16:54 ` Roman Dobosz
2011-09-18 13:19 ` pk
2011-09-18 13:31 ` Canek Peláez Valdés
2011-09-18 17:43 ` pk
2011-09-18 19:52 ` Michael Mol
2011-09-18 21:06 ` Volker Armin Hemmann
2011-09-19 19:23 ` Alan McKinnon
2011-09-19 16:23 ` pk
2011-09-19 16:37 ` Michael Mol
2011-09-19 17:42 ` Volker Armin Hemmann
2011-09-19 18:02 ` Michael Mol
2011-09-19 19:20 ` Alan McKinnon
2011-09-19 19:42 ` Michael Mol
2011-09-19 20:44 ` Volker Armin Hemmann
2011-09-19 22:13 ` Neil Bothwick
2011-09-19 6:21 ` Paul Colquhoun
2011-09-19 16:28 ` Volker Armin Hemmann
2011-09-18 13:37 ` Volker Armin Hemmann
2011-09-18 13:58 ` Michael Mol
2011-09-18 21:07 ` Volker Armin Hemmann
2011-09-19 17:13 ` Michael Mol
2011-09-18 13:15 ` Canek Peláez Valdés
2011-09-18 13:33 ` Volker Armin Hemmann
2011-09-22 15:06 ` [gentoo-user] " Michael Orlitzky
2011-09-17 21:03 ` pk
2011-09-17 21:25 ` Canek Peláez Valdés
2011-09-19 8:30 ` [gentoo-user] " Nicolas Sebrecht
2011-09-19 14:22 ` Alan McKinnon
2011-09-19 14:41 ` Michael Schreckenbauer
2011-09-19 16:36 ` Volker Armin Hemmann
2011-09-19 17:25 ` Michael Schreckenbauer
2011-09-19 17:43 ` Volker Armin Hemmann
2011-09-19 17:59 ` Michael Schreckenbauer
2011-09-19 18:06 ` Michael Mol
2011-09-19 19:12 ` Alan McKinnon
2011-09-19 20:46 ` Volker Armin Hemmann
2011-09-19 21:22 ` Alan McKinnon
2011-09-20 2:00 ` Indi
2011-09-19 18:28 ` pk
2011-09-20 10:13 ` James Broadhead
2011-09-20 23:12 ` Alan McKinnon
2011-09-20 23:47 ` Dale
2011-09-21 17:55 ` Mick
2011-09-17 18:43 ` [gentoo-user] " Canek Peláez Valdés
2011-09-18 14:47 ` Joost Roeleveld
2011-09-18 15:32 ` Pandu Poluan
2011-09-15 20:26 ` Alan McKinnon
2011-09-14 9:06 ` Neil Bothwick
2011-09-14 14:37 ` Canek Peláez Valdés
2011-09-14 14:49 ` Michael Mol
2011-09-14 15:36 ` Neil Bothwick
2011-09-14 15:43 ` Michael Mol
2011-09-14 16:05 ` Allan Gottlieb
2011-09-14 16:10 ` Canek Peláez Valdés
2011-09-14 18:59 ` Neil Bothwick
2011-09-14 22:37 ` Peter Humphrey
2011-09-14 23:43 ` Neil Bothwick
2011-09-14 23:51 ` Peter Humphrey
2011-09-14 15:35 ` Neil Bothwick
2011-09-14 16:07 ` Canek Peláez Valdés
2011-09-14 16:40 ` Sebastian Beßler
2011-09-15 7:37 ` Joost Roeleveld
2011-09-15 7:26 ` Joost Roeleveld
2011-09-14 10:25 ` Alan Mackenzie
2011-09-14 14:10 ` Mick
2011-09-14 14:19 ` Michael Mol
2011-09-14 14:56 ` Canek Peláez Valdés
2011-09-14 14:50 ` Canek Peláez Valdés
2011-09-14 14:47 ` Canek Peláez Valdés
2011-09-14 15:04 ` Stroller
2011-09-14 21:34 ` Alan Mackenzie
2011-09-14 22:05 ` Really OT now (Re: [gentoo-user] udev + /usr) Michael Schreckenbauer
2011-09-14 22:35 ` Michael Mol
2011-09-15 18:58 ` IDE for C/C++ (Was: " David W Noon
2011-09-15 19:16 ` Michael Mol
2011-09-15 19:47 ` Leonardo Guilherme
2011-09-15 19:59 ` Chris Brennan
2011-09-15 20:05 ` Michael Mol
2011-09-15 21:39 ` Joost Roeleveld
2011-09-16 0:22 ` Michael Mol
2011-09-16 9:43 ` Michael Schreckenbauer
2011-09-16 12:30 ` Mike Edenfield
2011-09-16 12:46 ` Michael Mol
2011-09-16 13:10 ` Alan Mackenzie
2011-09-15 21:37 ` Alexander Tanyukevich
2011-09-15 21:38 ` Alexander Tanyukevich
2011-09-15 20:09 ` [gentoo-user] Re: Really OT now (Re: " Nikos Chantziaras
2011-09-15 14:10 ` [gentoo-user] udev + /usr Stroller
2011-09-13 16:24 ` David W Noon
2011-09-13 23:00 ` Mike Edenfield
2011-09-13 12:38 ` Mike Edenfield
2011-09-13 12:45 ` Neil Bothwick
2011-09-13 15:09 ` Stroller
2011-09-13 15:46 ` Neil Bothwick
2011-09-13 23:10 ` Mike Edenfield
2011-09-13 12:59 ` Michael Mol
2011-09-14 20:41 ` pk
2011-09-12 20:45 ` Alan McKinnon
2011-09-12 15:35 ` Canek Peláez Valdés
2011-09-12 15:59 ` Michael Schreckenbauer
2011-09-13 7:28 ` Paul Colquhoun
2011-09-12 16:21 ` Dale
2011-09-12 16:42 ` Canek Peláez Valdés
2011-09-12 16:52 ` Michael Schreckenbauer
2011-09-12 18:26 ` Canek Peláez Valdés
2011-09-12 18:54 ` Michael Schreckenbauer
2011-09-12 16:55 ` Michael Mol
2011-09-12 20:34 ` Alan McKinnon
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