From: Andries Brouwer <aebr@win.tue.nl>
To: Linus Torvalds <torvalds@osdl.org>
Cc: Andries Brouwer <aebr@win.tue.nl>, Greg KH <greg@kroah.com>,
Andrey Borzenkov <arvidjaar@mail.ru>,
linux-hotplug-devel@lists.sourceforge.net,
linux-kernel@vger.kernel.org
Subject: Re: removable media revalidation - udev vs. devfs or static /dev
Date: Thu, 08 Jan 2004 03:35:06 +0000 [thread overview]
Message-ID: <20040108043506.A1555@pclin040.win.tue.nl> (raw)
In-Reply-To: <Pine.LNX.4.58.0401071854500.2131@home.osdl.org>; from torvalds@osdl.org on Wed, Jan 07, 2004 at 06:56:30PM -0800
On Wed, Jan 07, 2004 at 06:56:30PM -0800, Linus Torvalds wrote:
> > > When I insert a card in my card reader, it had better "just work". WITHOUT
> > > any strange "poll another device Y to make device X" work.
> >
> > But it does just work.
> >
> > Already today.
>
> Exactly. It works today, because:
>
> - the device nodes are there.
>
> Ergo: udev should create the device nodes
>
> - the kernel autopartitions the device on any open (both main device and
> the subpartitions) when it notices a changed media. No polling
> required.
>
> Ergo: the kernel should continue to do this.
>
> We should _not_ be in the situation where either of these things aren't
> true.
Indeed.
I am even happy in a somewhat more general situation that you are.
If the kernel autopartitions (and make recognition of new partitions
hotplug events so that udev can create the device nodes), all is well.
On the other hand, if the kernel does not autopartition
(for example because I had not selected CONFIG_MAC_PARTITION
and put a Mac disk in my ZIP drive) then all is still well
since user space can tell the kernel about the partitions
it sees on this Mac disk. Of course these partitions that
userspace tells the kernel about must also lead to hotplug
events.
Andries
-------------------------------------------------------
This SF.net email is sponsored by: Perforce Software.
Perforce is the Fast Software Configuration Management System offering
advanced branching capabilities and atomic changes on 50+ platforms.
Free Eval! http://www.perforce.com/perforce/loadprog.html
_______________________________________________
Linux-hotplug-devel mailing list http://linux-hotplug.sourceforge.net
Linux-hotplug-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/linux-hotplug-devel
next prev parent reply other threads:[~2004-01-08 3:35 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-01-01 20:33 removable media revalidation - udev vs. devfs or static /dev Andrey Borzenkov
2004-01-03 5:58 ` Greg KH
2004-01-03 8:51 ` Andrey Borzenkov
2004-01-03 12:37 ` Andries Brouwer
2004-01-03 12:42 ` Olaf Hering
2004-01-03 16:05 ` Andrey Borzenkov
2004-01-03 17:54 ` Jens Axboe
2004-01-07 9:43 ` Olaf Hering
2004-01-07 9:50 ` Jens Axboe
2004-01-07 9:56 ` Olaf Hering
2004-01-07 9:59 ` Jens Axboe
2004-01-07 10:25 ` Olaf Hering
2004-01-07 10:31 ` Jens Axboe
2004-01-07 10:47 ` Andrey Borzenkov
2004-01-07 10:54 ` Jens Axboe
2004-01-07 17:56 ` Greg KH
2004-01-30 12:59 ` Olaf Hering
2004-01-07 11:00 ` Andrey Borzenkov
2004-01-07 11:05 ` Jens Axboe
2004-01-07 11:14 ` Andrey Borzenkov
2004-01-07 11:16 ` Jens Axboe
2004-01-03 20:51 ` Greg KH
2004-01-07 18:38 ` Linus Torvalds
2004-01-07 18:57 ` Greg KH
2004-01-07 19:23 ` Mika Penttilä
2004-01-07 19:24 ` Greg KH
2004-01-07 19:31 ` Mika Penttilä
2004-01-08 1:38 ` Linus Torvalds
2004-01-07 19:31 ` Linus Torvalds
2004-01-07 19:50 ` Greg KH
2004-01-07 20:25 ` Richard Troth
2004-01-07 23:34 ` Greg KH
2004-01-08 0:32 ` Martin J. Bligh
2004-01-08 0:41 ` Greg KH
2004-01-08 1:07 ` Martin J. Bligh
2004-01-08 1:15 ` Greg KH
2004-01-08 1:50 ` Martin J. Bligh
2004-01-08 1:48 ` Linus Torvalds
2004-01-08 0:42 ` viro
2004-01-08 1:16 ` Greg KH
2004-01-09 3:36 ` Joel Becker
2004-01-07 20:52 ` Olaf Hering
2004-01-08 2:03 ` Linus Torvalds
2004-01-08 4:16 ` Gene Heskett
2004-01-08 4:23 ` Linus Torvalds
2004-01-08 7:45 ` Olaf Hering
2004-01-08 2:13 ` Andries Brouwer
2004-01-08 2:19 ` Linus Torvalds
2004-01-08 2:49 ` Andries Brouwer
2004-01-08 2:56 ` Linus Torvalds
2004-01-08 3:35 ` Andries Brouwer [this message]
2004-01-08 3:43 ` Linus Torvalds
2004-01-08 8:00 ` Xavier Bestel
2004-01-09 0:28 ` Robert Love
2004-01-09 0:52 ` Linus Torvalds
2004-01-09 1:16 ` Matt Mackall
2004-01-08 14:06 ` "Andrey Borzenkov"
2004-01-12 9:09 ` Ling, Xiaofeng
2004-03-29 15:39 ` Greg KH
2004-03-29 15:39 ` Andrey Borzenkov
2004-03-29 15:40 ` Andries Brouwer
2004-03-29 15:40 ` Olaf Hering
2004-03-29 15:40 ` Andrey Borzenkov
2004-03-29 15:40 ` Jens Axboe
2004-03-29 15:40 ` Greg KH
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20040108043506.A1555@pclin040.win.tue.nl \
--to=aebr@win.tue.nl \
--cc=arvidjaar@mail.ru \
--cc=greg@kroah.com \
--cc=linux-hotplug-devel@lists.sourceforge.net \
--cc=linux-kernel@vger.kernel.org \
--cc=torvalds@osdl.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).