Re: udev & kernel names

[Greg KH <greg@kroah.com>]

On Tue, Apr 26, 2005 at 04:15:16PM -0700, Nishanth Aravamudan wrote:
> Greg, udev Developers,
> 
> One of the most valuable features of new udev-based system is persistent
> device naming. This is especially useful for large systems, which may
> involve upwards of 4000 disks. Rather than determining which disk is
> sdzz, the administrator can name it tray15_disk7 and thus easily access
> the drive. We all know this much, though.
> 
> Another interesting idea would be to somehow inform the kernel of these
> new names (sysfs?).

Um, didn't we talk about this before?

And didn't I get across the point that this is pointless, wrong, and
will never happen? :)

> The gist being that currently, even though udev has
> created a new dev node for the device, the kernel is unaware of this
> ``name'' when reporting errors. I think it could be very useful for our
> friendly sysadmin to see ``tray15_disk7 has failed'' rather than ``sdzz
> has failed.'' Or perhaps they want to offline an entire tray; it would
> be simpler in scripts to refer to ``tray15_*'' than the appropriate
> kernel device nodes.
> 
> My questions are:
> 
> Is this feasible?

No.

> Would a new file per-device in sysfs be the appropriate place for this?

No.

> Is there a better way to go about getting these useful log messages?

Modify your syslog program to do it.

Oh, and what about the fact that I can create 2 device nodes in the fs
that really are the same kernel device?

/me watches the ras developers get all agitated

> If I need to clarify the problem/proposed solution further, please let
> me know.

Please let me know who is trying to drive such a misguided and
ill-conceived issue and I will track them down...

thanks,

greg k-h


-------------------------------------------------------
SF.Net email is sponsored by: Tell us your software development plans!
Take this survey and enter to win a one-year sub to SourceForge.net
Plus IDC's 2005 look-ahead and a copy of this survey
Click here to start!  http://www.idcswdc.com/cgi-bin/survey?id\x105hix
_______________________________________________
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