Forcefully unmounting devfs...
Robert Watson
rwatson at freebsd.org
Tue Dec 21 10:26:49 PST 2004
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 at fledge.watson.org Principal Research Scientist, McAfee Research
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