From: Greg KH <greg@kroah.com>
To: Andreas Jellinghaus <aj@dungeon.inka.de>
Cc: linux-kernel@vger.kernel.org
Subject: Re: State of devfs in 2.6?
Date: Mon, 8 Dec 2003 15:34:28 -0800 [thread overview]
Message-ID: <20031208233428.GA31370@kroah.com> (raw)
In-Reply-To: <pan.2003.12.08.23.04.07.111640@dungeon.inka.de>
On Tue, Dec 09, 2003 at 12:04:08AM +0100, Andreas Jellinghaus wrote:
> On Mon, 08 Dec 2003 15:50:45 +0000, William Lee Irwin III wrote:
> > I would say it's deprecated at the very least. sysfs and udev are
> > supposed to provide equivalent functionality, albeit by a somewhat
> > different mechanism.
>
> huh?
>
> aj@simulacron:/dev$ find -type c -mount |grep -v pty |wc -l
> 164
> aj@simulacron:/dev$ find -type b |wc -l
> 157
> aj@simulacron:/dev$ find /sys/ -name dev |wc -l
> 250
>
> After ignoring .devfsd we are left with 70 devices missing:
> - 15 floppy devices
You have 15 floppy devices connected to your box? All floppy devices
should show up in /sys/block.
> - 5 input/ devices
Patch for sysfs support for this has been posted by Hanna Linder. It
still needs work before being added to the kernel tree.
> - full, kmem, kmsg, mem, null, port, random, urandom, zero
Patch for this has been posted by me to lkml in the past. It will
probably go into 2.6.1
> - printers/0
Hanna Linder is working on a patch for these devices.
> - 5 misc/ devices
Patch for this has been posted by me to lkml in the past. It will
probably go into 2.6.1.
> - 12 snd/ devices
> - 5 sound/ devices
I have a patch here from Leann Ogasawara that adds sysfs support for
these devices. I've been lacking time to test it better, but again, it
will probably make it into 2.6.1.
> - 18 vcc/ devices
Hm, good catch. I wonder why these aren't getting picked up in
/sys/class/tty as they are tty devices. I thought they used to be
there...
> I wouldn't call udev deprecated, unless a newer kernel has the
> essential devices, too.
You mean s/udev/devfs/ right? :)
> And is there a udev version that can
> do devfs names? last time I checked only lanana names were supported.
There is a udev config file that was just posted to linux-hotplug-devel
that supports a lot of devfs names. If there are any missing that you
use, please post a config file for them.
Remember, I don't use devfs, so I really don't care about a udev mapping
for it :)
> Some distributions were quite happy to move from /dev and lanana to
> devfs with better names.
Hm, 2? And one of them (Mandrake) got smart and went back...
> I doubt everyone will rush to udev with lanana names,
Why not? It's the standard afterall. Remember, the devfs users are in
the tiny minority here.
> and
> re-introducing makedev for devices not represented
> in sysfs doesn't sound very nice either. So 2.8.* might be a nice time
> frame for dropping devfs, or at least give sysfs and udev a few months
> to catch up on the issues mentioned.
Regardless of the state of udev, devfs has insolvable problems and you
should not use it. End of story.
thanks,
greg k-h
next prev parent reply other threads:[~2003-12-08 23:42 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-12-08 15:36 State of devfs in 2.6? Andrew Walrond
2003-12-08 15:42 ` William Lee Irwin III
2003-12-08 15:59 ` Andrew Walrond
2003-12-08 23:38 ` Greg KH
2003-12-09 10:37 ` Andrew Walrond
2003-12-09 10:57 ` Måns Rullgård
2003-12-09 12:54 ` Paul P Komkoff Jr
2003-12-09 5:04 ` Rob Landley
2003-12-08 19:09 ` udev sysfs docs " Bob
2003-12-08 23:37 ` Greg KH
2003-12-09 5:17 ` Witukind
2003-12-09 7:21 ` Bob
2003-12-09 7:39 ` Matthew Reppert
2003-12-09 8:52 ` Måns Rullgård
2003-12-09 9:16 ` Greg KH
2003-12-09 9:45 ` Måns Rullgård
2003-12-09 9:18 ` Greg KH
2003-12-09 9:46 ` Andreas Jellinghaus
2003-12-09 10:25 ` Måns Rullgård
2003-12-09 15:28 ` Andreas Jellinghaus
2003-12-09 20:16 ` Oliver Hunt
2003-12-09 20:53 ` Måns Rullgård
2003-12-09 22:14 ` Olaf Hering
2003-12-09 22:46 ` Oliver Hunt
2003-12-09 23:03 ` Måns Rullgård
2003-12-09 7:56 ` Greg KH
2003-12-09 9:00 ` Xavier Bestel
2003-12-09 9:08 ` Greg KH
2003-12-09 9:19 ` Miles Bader
2003-12-09 9:39 ` Måns Rullgård
2003-12-09 11:01 ` Helge Hafting
2003-12-12 11:26 ` Jamie Lokier
2003-12-12 13:33 ` Duncan Sands
2003-12-12 14:51 ` Jamie Lokier
2003-12-12 16:34 ` Chuck Campbell
2003-12-12 17:13 ` Chris Friesen
2003-12-12 17:17 ` Måns Rullgård
2003-12-15 2:12 ` Miles Bader
2003-12-15 3:51 ` Mark Mielke
2003-12-15 6:09 ` Tim Connors
2003-12-10 19:23 ` Witukind
2003-12-10 19:33 ` Måns Rullgård
2003-12-10 20:22 ` Witukind
2003-12-10 20:47 ` Ed Sweetman
2003-12-10 20:53 ` Ed Sweetman
2003-12-10 21:31 ` Witukind
2003-12-10 21:28 ` Witukind
2003-12-10 21:48 ` Måns Rullgård
2003-12-11 6:31 ` Witukind
2003-12-10 21:49 ` Måns Rullgård
2003-12-10 23:48 ` Maciej Zenczykowski
2003-12-11 1:53 ` Mark Mielke
2003-12-11 8:42 ` Måns Rullgård
2003-12-11 16:33 ` Mark Mielke
2003-12-10 20:48 ` Måns Rullgård
2003-12-10 23:40 ` Maciej Zenczykowski
2003-12-09 9:55 ` Xavier Bestel
2003-12-09 13:03 ` Maciej Zenczykowski
2003-12-09 15:01 ` Helge Hafting
2003-12-09 18:30 ` Greg KH
2003-12-09 18:53 ` Måns Rullgård
2003-12-10 7:02 ` Xavier Bestel
2003-12-10 20:06 ` Witukind
2003-12-11 9:27 ` Xavier Bestel
2003-12-11 10:15 ` Måns Rullgård
2003-12-11 11:05 ` Xavier Bestel
2003-12-10 0:38 ` Greg KH
2003-12-09 9:26 ` Måns Rullgård
2003-12-09 9:41 ` Miles Bader
2003-12-10 8:13 ` Jakob Oestergaard
2003-12-10 8:24 ` Rob Landley
2003-12-08 23:04 ` Andreas Jellinghaus
2003-12-08 23:34 ` Greg KH [this message]
2003-12-09 0:31 ` Sven-Haegar Koch
2003-12-09 0:42 ` Greg KH
2003-12-09 0:51 ` [PATCH] sysfs support for vcs devices (was Re: State of devfs in 2.6?) Greg KH
2003-12-09 5:26 ` State of devfs in 2.6? Rob Landley
2003-12-09 18:19 ` Greg KH
2003-12-09 18:20 ` Greg KH
2003-12-09 7:02 ` Andreas Jellinghaus
2003-12-09 7:13 ` Murray J. Root
2003-12-09 8:21 ` Holger Schurig
2003-12-09 8:52 ` Miles Bader
2003-12-09 10:08 ` Holger Schurig
2003-12-09 17:10 ` Mark Mielke
2003-12-10 5:42 ` Greg KH
2003-12-10 23:29 ` jw schultz
2003-12-11 20:32 ` [2.4.23] cursor dissapears in framebuffer console after switching back from X Witukind
2003-12-11 23:59 ` Gene Heskett
2003-12-12 6:24 ` Witukind
2003-12-09 8:32 ` State of devfs in 2.6? Greg KH
2003-12-09 9:59 ` Jan Dittmer
2003-12-09 13:54 ` Matthew Reppert
2003-12-09 16:27 ` Greg KH
2003-12-09 16:47 ` Eduard Bloch
2003-12-09 19:33 ` Greg KH
2003-12-10 2:15 ` Clemens Schwaighofer
2003-12-10 4:10 ` Bob
2003-12-09 7:33 ` Vojtech Pavlik
2003-12-09 9:48 ` Andreas Jellinghaus
2003-12-08 23:35 ` Greg KH
[not found] <10vOq-7mK-11@gated-at.bofh.it>
[not found] ` <10vON-7mK-29@gated-at.bofh.it>
[not found] ` <10CGd-1SM-39@gated-at.bofh.it>
[not found] ` <10DiJ-2Qj-17@gated-at.bofh.it>
[not found] ` <10Kas-8kr-3@gated-at.bofh.it>
[not found] ` <10Kka-dD-11@gated-at.bofh.it>
[not found] ` <10LJg-3zb-9@gated-at.bofh.it>
[not found] ` <10LT5-3Wo-13@gated-at.bofh.it>
[not found] ` <10N8i-7bE-1@gated-at.bofh.it>
2003-12-09 16:22 ` Pascal Schmidt
2003-12-09 18:50 Svetoslav Slavtchev
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