Re: (Semi-random) thoughts on device tree structure and devfs

[Joerg Sonnenberger <joerg%britannica.bec.de@localhost>]

On Tue, Mar 09, 2010 at 09:43:03AM -0600, David Young wrote:
> On Tue, Mar 09, 2010 at 04:25:06PM +0100, Joerg Sonnenberger wrote:
> > On Tue, Mar 09, 2010 at 08:09:57AM +0000, Iain Hibbert wrote:
> > > I have never used wedges but, for the disk case, would it not be better to
> > > make a method of configuring a dk in advance, so that whenever a disk
> > > appears with the correct parameters it will already be mapped to the dk
> > > you expect? (perhaps a daemon could handle it) Then you know that /dev/dk3
> > > is your USB stick and will never be anything else..
> > 
> > I don't think it has to be or should be in the kernel. Basically,
> > /dev/dk3 gets created or is used by the kernel. A daemon is notified
> > (*cough* udevd) and that scans the device properties, finds the UUID and
> > creates /dev/uuid/2345324523453245. It also finds the label and creates
> > /dev/label/my-usb-stick. The latter is what you put in /etc/fstab.
> 
> What if udevd is on /dev/uuid/2345324523453245 ?

The boot loader has a separate mechanism to pass down what is booted
from. That should be good enough for getting root mounted.

Joerg