Re: Forcefully unmounting devfs...

From: Robert Watson (rwatson_at_freebsd.org)
Date: 12/21/04

  • Next message: Poul-Henning Kamp: "Re: Forcefully unmounting devfs..." 
    Date: Tue, 21 Dec 2004 18:23:46 +0000 (GMT)
To: Poul-Henning Kamp <phk@phk.freebsd.dk>

    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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