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Date:      Sun, 9 May 1999 17:49:14 +0930
From:      Greg Lehey <grog@lemis.com>
To:        Peter Wemm <peter@netplex.com.au>
Cc:        FreeBSD current users <FreeBSD-current@FreeBSD.ORG>
Subject:   Re: HEADS UP: bdevsw has changed its character
Message-ID:  <19990509174914.A22791@freebie.lemis.com>
In-Reply-To: <19990509081553.6AB261F72@spinner.netplex.com.au>; from Peter Wemm on Sun, May 09, 1999 at 04:15:51PM %2B0800
References:  <19990509100031.N68170@freebie.lemis.com> <19990509081553.6AB261F72@spinner.netplex.com.au>

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On Sunday,  9 May 1999 at 16:15:51 +0800, Peter Wemm wrote:
> Greg Lehey wrote:
>> A day or so ago, bdevsw changed from being an array of struct cdevsws
>> to an inline function.  That's not a problem in itself: do a make
>> world and all will be well.  It does, however, mean that klds which
>> were compiled before the change will no longer load.  I had a report
>> today of one person who forgot to do this, and his source tree is on a
>> vinum volume, and he can't load vinum.  Beware!
>
> That isn't all..  If you are using kld modules, it is a Really Good Idea to
> keep your kld modules compiled and in sync with your kernel while internal
> interfaces are changing.

Right, it was just pretty unfortunate in this case (and I heard of
another one) that the person had his source tree mounted on a vinum
volume, so he could no longer access it :-) If this happens to anybody
else, there's a version of the vinum kld compiled this morning on
ftp://ftp.lemis.com/pub/vinum/vinum.ko.

> kget(8) also will need a recompile.
>
> People who are running -current for stability had better be damn careful
> and be very selective about what they choose to run as a stable snapshot.

I think the real problem is that the klds get built with "make world"
and not with a kernel build.  How about changing that?  I've got the
opposite problem on another machine: I did a make world, but not a
reboot, and now my Linux emulation is broken.

Greg
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