From mboxrd@z Thu Jan 1 00:00:00 1970 From: "J.A. Magallon" Date: Mon, 29 Mar 2004 15:39:32 +0000 Subject: Re: udev - please help me to understand Message-Id: <009401c415a4$081a07c0$d100000a@sbs2003.local> List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: linux-hotplug@vger.kernel.org On 01.02, Greg KH wrote: > On Fri, Jan 02, 2004 at 09:48:36PM +1000, Steve Youngs wrote: > > Hi Greg! > > > > I've been looking at this "udev" thingy and I can't for the life of me > > see why I'd need it. There doesn't appear to be _any_ advantages of > > using udev in my present situation. > > Ok, great. Then don't use it, I'm not forcing you to for 2.6 :) > > > No, I don't use devfs. > > > > I have zero hot-pluggable devices (that might change somewhere in the > > distant future, but for now I don't have any). And never in my wildest > > dreams could I ever imagine running out of device numbers. > > > > Reading through the documentation that I've found about udev, your > > main points seem to be about: > > > > - udev vs devfs > > - running out of device major/minor numbers > > - not having to worry about major/minor numbers > > > > For me, the first point is moot because I don't use devfs. The second > > point is just plain ridiculous, there is just _no_ way that it could > > happen (remember that I'm talking about my own situation). > > If you never have any hotpluggable devices, nor any need to move disks > around in your system, then you don't need udev. > Don't think so. My first use for udev is a cluster (when bproc works on 2.6 ;)). Or in general diskless booting. You build your initrd for remote boot. You have two options: - copy a full /dev from a working host (tons of files that make the rd big just to fit all the inodes). - spend a lot of time guessing what is and what is not needed on each node (you can have ata drives, scsi ones, different network cards, different graphics cards...) I just want to boot with and empty /dev and let udev populate it, even with same device names for different hadrware. And nodes will never hotplug anything. IE, I want a working and race free devfs, and this is udev. -- J.A. Magallon \ Software is like sex: werewolf!able!es \ It's better when it's free Mandrake Linux release 10.0 (Cooker) for i586 Linux 2.6.1-rc1-jam1 (gcc 3.3.2 (Mandrake Linux 10.0 3.3.2-3mdk)) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id70&alloc_id638&op=click _______________________________________________ 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