Date: Mon, 16 Aug 1999 14:15:30 +0200 From: Poul-Henning Kamp <phk@critter.freebsd.dk> To: Brian Somers <brian@Awfulhak.org> Cc: Dag-Erling Smorgrav <des@flood.ping.uio.no>, Julian Elischer <julian@whistle.com>, cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/miscfs/specfs spec_vnops.c src/sys/sys conf.h Message-ID: <19048.934805730@critter.freebsd.dk> In-Reply-To: Your message of "Mon, 16 Aug 1999 11:45:19 BST." <199908161045.LAA76741@keep.lan.Awfulhak.org>
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In message <199908161045.LAA76741@keep.lan.Awfulhak.org>, Brian Somers writes:
>> Brian Somers <brian@Awfulhak.org> writes:
>> > From what I can tell, this requires that the driver ignores the minor
>> > number ('cos it's the same for all accesses) but keeps a track of of
>> > the process id in the device structure. The driver would need to
>> > know about fork()s and *all* close()s, and would probably need to
>> > use something faster than `sequential' to find the device structure
>> > from the pid (some sort of hash).
>>
>> What if the same process needs several instances of the same device?
>
>Yes - it would need to know about dup*() too and would have to store
>an instance number as well as the processid. It's definitely
>non-trivial.
You guys lost me here... What are we discussing now ?
--
Poul-Henning Kamp FreeBSD coreteam member
phk@FreeBSD.ORG "Real hackers run -current on their laptop."
FreeBSD -- It will take a long time before progress goes too far!
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