*BSD News Article 97076


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From: brian@shift.utell.net (Brian Somers)
Newsgroups: comp.unix.bsd.freebsd.misc
Subject: Re: mmap() incapable of mapping block special files
Date: 2 Jun 1997 14:56:31 GMT
Organization: Awfulhak Ltd.
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In article <Pine.BSF.3.95.970601211328.23344A-100000@current1.whistle.com>,
	Julian Elischer <julian@current1.whistle.com> writes:
> I think you should ask this question on 'hackers'
> I think that it is relevant there..
> 
> here is unlikely to get read by the right people..
> 
> I'm not sure if BDEVs can handle that..
> I would doubt it but it MIGHT work..

I doubt it.  If you think about what mmap does, it sort of
makes its target into a block device.....  Wouldn't mmap'ing
a bdev put each page in a buffer twice ?

Why would anyone want to do this anyway (apart from "because
you should be able to abstract things to that level") ?

> julian
> 

-- 
Brian <brian@awfulhak.org> <brian@freebsd.org>
      <http://www.awfulhak.org>
Don't _EVER_ lose your sense of humour !