From mboxrd@z Thu Jan 1 00:00:00 1970 From: Greg KH Date: Wed, 27 Apr 2005 16:05:46 +0000 Subject: Re: udev & kernel names Message-Id: <20050427160546.GC2043@kroah.com> List-Id: References: <20050426231516.GD2740@us.ibm.com> In-Reply-To: <20050426231516.GD2740@us.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org 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?id5hix _______________________________________________ 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