Forcefully unmounting devfs...
Poul-Henning Kamp
phk at phk.freebsd.dk
Tue Dec 21 10:35:03 PST 2004
In message <Pine.NEB.3.96L.1041221182235.48875Y-100000 at fledge.watson.org>, Robe
rt Watson writes:
>
>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?
It's worse: we specfs the vnodes which results in varying degress of success,
depending on device type.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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