Re: udev and devfs - The final word

[Eric W. Biederman]

viro@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx writes:

> On Sun, Jan 04, 2004 at 08:02:20PM -0800, Linus Torvalds wrote:
> > Now, we'd probably not want to force the switch, but I do suspect we'll 
> > have exactly this as a switch in the "Kernel Debugging Config" section. 
> > Where even _common_ things like disks could end up with per-bootup values. 
> > Just to verify that every part of the system ends up having it right.
> 
> Then we'd better have a very good idea of the things that are going to
> break.  Note that right now even late-boot code in kernel itself will
> break on that - there are explicit checks for ROOT_DEV==MKDEV(2,0),
> all sorts of weird crap deep in the bowels of arch/ppc/*/*, etc.

/sbin/lilo and possibly some of the other bootloaders.  Relationships
between devices are a challenge to work with.  How do you go from a
partition to it's actual block device etc.  I don't remember how many
major numbers lilo has hard coded, I just remember looking at it once
and realizing I couldn't think of a better way to accomplish what it
was trying to do.

Eric

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