From owner-freebsd-hackers Fri Jan 25 17:31: 4 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from apollo.backplane.com (apollo.backplane.com [216.240.41.2]) by hub.freebsd.org (Postfix) with ESMTP id 08BF437B402; Fri, 25 Jan 2002 17:31:02 -0800 (PST) Received: (from dillon@localhost) by apollo.backplane.com (8.11.6/8.9.1) id g0Q1Ux718134; Fri, 25 Jan 2002 17:30:59 -0800 (PST) (envelope-from dillon) Date: Fri, 25 Jan 2002 17:30:59 -0800 (PST) From: Matthew Dillon Message-Id: <200201260130.g0Q1Ux718134@apollo.backplane.com> To: Terry Lambert Cc: Julian Elischer , Poul-Henning Kamp , Robert Watson , Kirk McKusick , Rik van Riel , freebsd-hackers@FreeBSD.ORG, David Xu Subject: Re: vm balance References: <38778.987605692@critter> <3ADDCDCA.86D1B3BE@elischer.org> <3C51DF9C.F73AF275@mindspring.com> Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG : :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 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message