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Date:      Mon, 9 Oct 2000 23:24:44 -0400 (EDT)
From:      "Marc G. Fournier" <scrappy@hub.org>
To:        Robert Watson <rwatson@freebsd.org>
Cc:        freebsd-current@freebsd.org
Subject:   Re: can't get into single user mode - panic: ffs_valloc: dup alloc
Message-ID:  <Pine.BSF.4.21.0010092323060.23541-100000@hub.org>
In-Reply-To: <Pine.NEB.3.96L.1001009231821.12081E-100000@fledge.watson.org>

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On Mon, 9 Oct 2000, Robert Watson wrote:

> On Mon, 9 Oct 2000, Marc G. Fournier wrote:
> 
> > 	Well, I swear I have to be missing something here that is going to
> > make me slap my forehead, but I can't get into single user mode :(
> > 
> > 	I hit the space bar, type in 'boot -s' and it goes through all the
> > normal start up procedures, sets up the networking, etc ...
> > 
> > 	The reason I'm trying to get into single user mode is cause I
> > can't get into multi-user without it doing:
> 
> That's interesting -- this morning, I hit a ffs_valloc: dup alloc panic
> following a buildworld.  I assumed it was to do with my local ACL patches,
> although I have been unable to find a bug that could trigger it.  I'm
> wondering if this isn't some sort of locking issue in VFS.  I managed to
> trigger it in ufs_mkdir(), as I introduced a potentially location for
> blocking where previously none existed, suggesting that perhaps some UFS
> code is playing fast and loose with vnode locks.  This panic is
> generated when FFS tries to recycle a vnode, but discovers it has a
> non-zero mode, indicating that it is in use elsewhere in the system,
> which should never happen.
> 
> BTW, do you have FFS_EXTATTR enabled?

not that I've enabled ...




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