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SubjectRe: UUIDs (and devfs and major/minor numbers)
Hi,

On Thu, 17 Jun 1999 tytso@mit.edu wrote:

> Date: Wed, 16 Jun 1999 22:58:00 +1000
> From: Richard Gooch <rgooch@atnf.csiro.au>
>
> So here we are, arguing about names, because suddenly Ted admitted
> that a virtual FS might be good. But then he says he doesn't like the
> names. Before that he was denying to the hilt that a virtual FS had
> any merit.

[snip]

> The issue is not virtual FS versus some other kernel interface. The
> issue is what appears in /dev, and whether the kernel code should be
> hard coding what happears in /dev. It shouldn't. That's policy. The
> kernel shouldn't be dictating policy.

I don't really understand the argument for why "it shouldn't"; but it
doesn't really matter because it already does - all possible root fs
devices (except loopback) are already hardcoded in the kernel so that it
knows what to make of 'root=/dev/hda3'. I don't care if 'policy' on this
matter is dictated in the kernel - for me it's a welcome consistency! Look
at the crap with the 'sg' devices; sga vs sg1. The policy argument
carries no weight at all for me, since I can always create symlinks
(debian does sg1 -> sga) and currently I only see benefits to a consistent
naming scheme. Show me where this ties my hands or causes me problems and
I'll listen.

Given all I've heard and all I've read (devfs FAQ) and the small size of
devfs, count me 'strongly in favor'.

> Instead, the kernel should be exporting sufficient information so that a
> user-mode daemon can provide whatever interesting naming scheme (and
> that naming scheme might include device names based on the UUID or the
> fslabel in the ext2 device, or something else far more general than what
> kernel-space code can provide.)

devfsd?

cheers,
David

- --
David L. Parsley
Network Specialist
City of Salem Schools


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