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Date:      Sat, 15 May 1999 08:41:56 +0200
From:      Poul-Henning Kamp <phk@critter.freebsd.dk>
To:        Julian Elischer <julian@whistle.com>
Cc:        Luoqi Chen <luoqi@watermarkgroup.com>, obrien@NUXI.com, current@FreeBSD.ORG
Subject:   Re: Today's kernel crashes on starting X 
Message-ID:  <18433.926750516@critter.freebsd.dk>
In-Reply-To: Your message of "Fri, 14 May 1999 12:21:32 PDT." <Pine.BSF.3.95.990514121818.24898A-100000@current1.whistle.com> 

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In message <Pine.BSF.3.95.990514121818.24898A-100000@current1.whistle.com>, Julian Elischer writes:
>
>On Fri, 14 May 1999, Luoqi Chen wrote:
>
>> > > This was due to a kludge in mfs implementation. Try change NUMCDEV in
>> > > kern_conf.c to 255.
>> > 
>> > Are you saying that there is a bug in the mfs implementation and a fix
>> > will be commited soon?  (and change NUMCDEV until then)
>> > 
>> > Or are you saying, the mfs implementation is now considered correct (but
>> > there are some kludges in there) and that changing NUMCDEV in kern_conf.c
>> > to 255 is the perminate fix?
>> >  
>> > -- 
>> > -- David    (obrien@NUXI.com  -or-  obrien@FreeBSD.org)
>> > 
>> This is a fundamental problem with mfs' design, mfs steals bdev major 255 for
>> its private use. One thing we could do is to have mfs legally acquire this
>> major number, i.e., setup a devsw structure and register with device conf
>> system. This problem probably would go away after we have a fully functional
>> DEVFS.
>
>Actually this problem is the one that makes DEVFS explode..
>It does an alias lookup on it's 'dummy' vnode and since teh sytem has been
>switched to use devfs routines for everything, some of it's 
>assumptions are not longer true..

I don't expect the current DEVFS prototype to be indicative of how our
real DEVFS will work.

--
Poul-Henning Kamp             FreeBSD coreteam member
phk@FreeBSD.ORG               "Real hackers run -current on their laptop."
FreeBSD -- It will take a long time before progress goes too far!


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