Date: Fri, 25 Jan 2002 17:30:59 -0800 (PST) From: Matthew Dillon <dillon@apollo.backplane.com> To: Terry Lambert <tlambert2@mindspring.com> Cc: Julian Elischer <julian@elischer.org>, Poul-Henning Kamp <phk@critter.freebsd.dk>, Robert Watson <rwatson@FreeBSD.ORG>, Kirk McKusick <mckusick@mckusick.com>, Rik van Riel <riel@conectiva.com.br>, freebsd-hackers@FreeBSD.ORG, David Xu <bsddiy@21cn.com> Subject: Re: vm balance Message-ID: <200201260130.g0Q1Ux718134@apollo.backplane.com> References: <38778.987605692@critter> <3ADDCDCA.86D1B3BE@elischer.org> <3C51DF9C.F73AF275@mindspring.com>
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:
:Julian Elischer wrote:
:> You can mmap() devices and you can mmap files..
:>
:> you cannot mmap FIFOs or sockets.
:>
:> for this reason I think that devices are still well represented by
:> vnodes. If we merged vnodes and vm objects,
:> then if devices were not vnodes, how would you represent
:> a vm area that maps a device?
:
:Merging vnodes and vm objects is an incredibly bad idea. There
:is a lot of other work that should be done before that can even
:be considered, and then it shouldn't be considered.
:
:In othe words, it's a good excuse for getting some needed
:changes in, but it's not a good idea.
:
:I know you and Kirk love the idea, but, truly, it is a bad
:idea.
I like the idea too, but every time I've looked at it it's been
a huge mess. In short, I don't think we will *ever* be able to merge
vnodes and VM objects.
-Matt
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