Date: Tue, 21 Dec 2004 18:23:46 +0000 (GMT) From: Robert Watson <rwatson@freebsd.org> To: Poul-Henning Kamp <phk@phk.freebsd.dk> Cc: arch@freebsd.org Subject: Re: Forcefully unmounting devfs... Message-ID: <Pine.NEB.3.96L.1041221182235.48875Y-100000@fledge.watson.org> In-Reply-To: <67697.1103392317@critter.freebsd.dk>
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On Sat, 18 Dec 2004, Poul-Henning Kamp wrote: > Brainteaser for the x-mas days: > > What is the correct handling of busy device vnodes belonging > to a devfs mountpoint which is being forcefully unmounted ? > > If you think this has a simple answer, please don't bother replying. Being something of a traditionalist, I'd ask the question: what happens in 4.x when you forceably unmount a UFS file system out from under the device nodes? I'm guessing we deadfs the UFS vnodes, which results in varying degrees of havoc depending on the device type? Robert N M Watson FreeBSD Core Team, TrustedBSD Projects robert@fledge.watson.org Principal Research Scientist, McAfee Research
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