Date: Wed, 06 Oct 1999 12:48:53 -0400 From: Simon Shapiro as Himself <shimon@simon-shapiro.org> To: "Daniel C. Sobral" <dcs@newsguy.com> Cc: arch@freebsd.org Subject: Re: Minor Device numbers Message-ID: <37FB7D75.1A413D00@simon-shapiro.org> References: <37FA70B9.B5DBA345@simon-shapiro.org> <37FB29E3.94672E74@newsguy.com>
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"Daniel C. Sobral" wrote:
>
> Simon Shapiro as Himself wrote:
> >
> > I am open to any polite suggestion, but my inclination
> > is to recommend 32bit major devices where the lower
> > 8 bits do exactly what they do today, and the upper
> > 24 are as per driver. The problem with that is that
> > the major number is stuck in the middle of the minor.
> > Actually was the upper byte on the PDP-11 :-).
> > To solve that one would need either separate arguments,
> > or turn dev_t to a 64bit integer.
>
> Well, I'd like devfs people to correct me if I'm incorrect, but...
>
> It is my impression that devfs solves your problem, to a certain
> extent. As devices get their numbers as they come and go, there is
> no need to reserve ranges to specific devices. I wouldn't mind
> someone taking this opportunity to explain exactly how devfs deals
> with this. :-)
This does not help production people like me who want 3.x support
and many more who actually want 2.2 support.
> Now, the main point of this message... the solution to all of dev's
> problem is devfs (axiom). As a result, nobody is going to help with
> work-arounds to your problem, since the correct solution is devfs.
> Or, in other words, until devfs comes along, you are not getting a
> solution to your problem. :-(
>
> Furthermore, I'm not sure devfs/slice can get into the tree before
> RELENG_4 comes along, and that would delay it, and anything
> depending on it, until 5.0-RELEASE! Frankly, that's a scenario I'd
> rather avoid. I think we'll be seriously impaired if we delay devfs
> further.
>
> --
> Daniel C. Sobral (8-DCS)
> dcs@newsguy.com
> dcs@freebsd.org
>
> "I always feel generous when I'm in the inner circle of a
> conspiracy to subvert the world order and, with a small group of
> allies, just defeated an alien invasion. Maybe I should value myself
> a little more?"
--
Sincerely Yours, Shimon@Simon-Shapiro.ORG
404.644.6401
Simon Shapiro
Unwritten code has no bugs and executes at twice the speed of mouth
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