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Date:      Tue, 27 Jan 2004 16:45:56 +0100
From:      "Poul-Henning Kamp" <phk@phk.freebsd.dk>
To:        Lukas Ertl <l.ertl@univie.ac.at>
Cc:        freebsd-geom@freebsd.org
Subject:   Re: Error checking for g_mod_event() and friends 
Message-ID:  <5276.1075218356@critter.freebsd.dk>
In-Reply-To: Your message of "Tue, 27 Jan 2004 16:39:01 %2B0100." <20040127163829.I92925@pcle2.cc.univie.ac.at> 

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In message <20040127163829.I92925@pcle2.cc.univie.ac.at>, Lukas Ertl writes:
>On Tue, 27 Jan 2004, Poul-Henning Kamp wrote:
>
>> In message <20040127160001.N92925@pcle2.cc.univie.ac.at>, Lukas Ertl writes:
>> >
>> >In the geom_vinum case I allocate the "main" vinum geom in the init
>> >method, and this might fail.
>> >
>> >(Of course, this might not be the correct way to do it, but I couldn't
>> >think of another way.)
>>
>> You're right, it isn't :-)
>>
>> You should never allocate anything until you first time taste a disk
>> which looks like yours.
>
>Ok, then how do I spawn a complete class from the tasting routine of
>another class?

You don't.

You initialize the classes when they are loaded.  Once you taste
something you like, you start creating "übergeom"s and what else
you need.

-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.



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