From: "Giacomo A. Catenazzi" <cate@debian.org>
To: Tonnerre <tonnerre@thundrix.ch>
Cc: Ian Campbell <icampbell@arcom.com>, Greg KH <greg@kroah.com>,
"Marco d'Itri" <md@Linux.IT>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: udev is too slow creating devices
Date: Wed, 15 Sep 2004 17:45:03 +0200 [thread overview]
Message-ID: <4148637F.9060706@debian.org> (raw)
In-Reply-To: <20040915152019.GD24818@thundrix.ch>
Tonnerre wrote:
>
> On Wed, Sep 15, 2004 at 03:36:06PM +0100, Ian Campbell wrote:
>
>>I wonder if it would be feasible for modprobe (or some other utility) to
>>have a new option: --wait-for=/dev/something which would wait for the
>>device node to appear. Perhaps by:
>> - some mechanism based on HAL, DBUS, whatever
>> - dnotify on /dev/?
>> - falling back to spinning and waiting.
>
>
> This would end up as hideous misfeature as you can't guarantee the
> device to show up *at* *all*.
>
> The reason udev is there is that we can dynamically respond to created
> device nodes and devices that show up. They might have changed since
> the last boot. Maybe they don't show up at all.
>
> Thus you should trigger your actions from /etc/dev.d.
It is right.
But an option --wait would be sufficient.
This option will require modprobe to wait (with a timeout of
x seconds) that hotplug event finish (so if device is created or
not is no more a problem).
Ideally this should be done modifing only hotplug and IMHO
should be enabled by default.
ciao
cate
next prev parent reply other threads:[~2004-09-15 15:45 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-09-14 18:33 udev is too slow creating devices Giacomo A. Catenazzi
2004-09-14 18:42 ` Greg KH
2004-09-14 19:21 ` Chris Meadors
2004-09-14 19:40 ` Chris Friesen
2004-09-14 19:52 ` Greg KH
2004-09-14 20:00 ` Chris Friesen
2004-09-14 20:43 ` Giacomo A. Catenazzi
2004-09-14 21:35 ` Greg KH
2004-09-14 21:45 ` Marco d'Itri
2004-09-14 21:51 ` Greg KH
2004-09-14 22:47 ` Andrea Arcangeli
2004-09-14 23:04 ` Greg KH
2004-09-14 23:20 ` Andrea Arcangeli
2004-09-14 23:34 ` Gianni Tedesco
2004-09-14 23:58 ` Andrea Arcangeli
2004-09-15 16:15 ` Greg KH
2004-09-15 19:21 ` Andrea Arcangeli
2004-09-15 22:09 ` Chris Friesen
2004-09-15 22:15 ` Andrea Arcangeli
2004-09-15 22:25 ` Greg KH
2004-09-15 22:23 ` Greg KH
2004-09-15 22:46 ` Andrea Arcangeli
2004-09-15 13:55 ` Giacomo A. Catenazzi
2004-09-15 14:36 ` Ian Campbell
2004-09-15 15:20 ` Tonnerre
2004-09-15 15:45 ` Giacomo A. Catenazzi [this message]
2004-09-15 16:12 ` Greg KH
2004-09-15 16:51 ` Marc Ballarin
2004-09-15 18:00 ` Greg KH
2004-09-19 16:51 ` Jon Masters
2004-09-19 18:53 ` Andreas Jellinghaus
2004-09-20 2:16 ` Alexander E. Patrakov
2004-09-17 8:06 ` Alexander E. Patrakov
2004-09-15 16:11 ` Greg KH
2004-09-15 16:09 ` Greg KH
2004-09-17 7:48 ` Alexander E. Patrakov
2004-09-14 22:03 ` Marc Ballarin
[not found] <http://lkml.org/lkml/2004/9/14/316@localhost.localdomain>
2004-09-14 20:30 ` Michael Thonke
[not found] <http://lkml.org/lkml/2004/9/15/119@localhost.localdomain>
2004-09-15 14:26 ` Michael Thonke
-- strict thread matches above, loose matches on Subject: below --
2004-09-18 19:25 Ihar 'Philips' Filipau
2004-09-18 21:24 ` Greg KH
2004-09-18 19:44 Ihar 'Philips' Filipau
2004-09-18 20:37 ` Marc Ballarin
2004-09-18 21:30 ` Greg KH
2004-09-19 0:06 ` Ihar 'Philips' Filipau
2004-09-19 0:41 ` Greg KH
2004-09-19 8:18 ` Ihar 'Philips' Filipau
2004-09-20 4:19 ` Greg KH
2004-09-19 4:38 ` Benjamin Herrenschmidt
2004-09-19 8:27 ` Ihar 'Philips' Filipau
2004-09-19 11:53 ` Alexander E. Patrakov
2004-09-19 17:32 ` Greg KH
2004-09-19 18:43 ` Grzegorz Kulewski
2004-09-20 4:11 ` Greg KH
2004-09-20 10:52 ` Jon Masters
2004-09-19 12:00 ` Marc Ballarin
2004-09-19 14:25 ` Ihar 'Philips' Filipau
2004-09-19 15:14 ` Marc Ballarin
2004-09-19 16:00 ` Alexander E. Patrakov
2004-09-19 17:11 ` Marc Ballarin
2004-09-19 17:30 ` Greg KH
2004-09-20 2:29 ` Alexander E. Patrakov
2004-09-20 16:17 ` Giacomo A. Catenazzi
2004-09-29 23:38 ` Randy.Dunlap
2004-09-29 23:53 ` Greg KH
2004-09-19 19:40 ` Ihar 'Philips' Filipau
2004-09-20 0:05 ` Kyle Moffett
2004-09-20 4:06 ` Greg KH
2004-09-20 8:54 ` Marc Ballarin
2004-09-20 0:03 ` Benjamin Herrenschmidt
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