linux-kernel - Re: BUG dcache.c:613 during autofs unmounting in 2.6.19rc2

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Date:	Tue, 17 Oct 2006 21:55:10 +0800
From:	Ian Kent <raven@...maw.net>
To:	Andi Kleen <ak@...e.de>
Cc:	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: BUG dcache.c:613 during autofs unmounting in 2.6.19rc2

On Tue, 2006-10-17 at 12:50 +0200, Andi Kleen wrote:
> On Tuesday 17 October 2006 06:15, Ian Kent wrote:
> > On Mon, 2006-10-16 at 16:58 +0200, Andi Kleen wrote:
> > > While unmounting autofs on shutdown my workstation got a dcache.c:613 BUG 
> > > with 2.6.19rc2.
> > > 
> > > Only jpegs available unfortunately:
> > > 
> > > http://one.firstfloor.org/~andi/autofs-oops1.jpg
> > > http://one.firstfloor.org/~andi/autofs-oops2.jpg
> > > 
> > > I think it was autofs3 instead of autofs4 - at least I got both compiled in.
> > > The autofs user land was autofs-4.1.4 (-6 suse rpm) 
> > 
> > Don't think compiling both in is a good idea.
> > They both register as "autofs" so you really should choose one and
> > disable the other.
> > 
> > For my part I have to recommend autofs4 (personally I'd like to see the
> > autofs v3 module deprecated) and autofs4 is really needed if your using
> > autofs version 4 or above.
> 
> Well it always worked this way in earlier kernels and even if the
> wrong module was suddenly used for some reason it shouldn't BUG.
> So something is broken.

True.

There have been some changes in this area (David Howells made some
changes which affected autofs4) and I'm not sure that the autofs module
was reviewed. I didn't look closely at it at the time, I guess I should
have. Sorry.

It will take a while longer to work out if the autofs if open to the
same issue resulting from Davids change.

Ian


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