From: Greg KH <greg@kroah.com>
To: Andrea Arcangeli <andrea@novell.com>
Cc: Chris Friesen <cfriesen@nortelnetworks.com>,
"Marco d'Itri" <md@Linux.IT>,
"Giacomo A. Catenazzi" <cate@pixelized.ch>,
linux-kernel@vger.kernel.org
Subject: Re: udev is too slow creating devices
Date: Wed, 15 Sep 2004 15:25:57 -0700 [thread overview]
Message-ID: <20040915222557.GE26591@kroah.com> (raw)
In-Reply-To: <20040915221523.GG15426@dualathlon.random>
On Thu, Sep 16, 2004 at 12:15:23AM +0200, Andrea Arcangeli wrote:
>
> But the microcode driver has nothing to do with hotplug or usb, and
> waiting for the device creation in the insmod syscall is sure natural
> and doable. Now if we don't want to create a little bit of API in udev
> to let insmod provide a sync behaviour and force people into the dev.d
> scripts and file locking in /var/run that it's one issue (you can aruge
> about higher perf), but there is a whole large class of devices that are
> not hot-pluggable and where the discovery is definitely synchronous,
> even common pci is fully sync in its discovery when you call
> pci_find_device/get_device.
That will be soon going away with my multi-threaded device discovery
work. And I run pci hotplug boxes (and so do all of the PCMCIA/CardBus
users), so don't discard PCI from being a async bus type :)
Async is now the norm, and drivers like the microcode module are the
exception.
thanks,
greg k-h
next prev parent reply other threads:[~2004-09-15 23:46 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 [this message]
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
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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