From owner-freebsd-current Sat Apr 18 14:54:04 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id OAA08745 for freebsd-current-outgoing; Sat, 18 Apr 1998 14:54:04 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from dyson.iquest.net (dyson.iquest.net [198.70.144.127]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id VAA08694 for ; Sat, 18 Apr 1998 21:53:57 GMT (envelope-from toor@dyson.iquest.net) Received: (from root@localhost) by dyson.iquest.net (8.8.8/8.8.8) id QAA25065; Sat, 18 Apr 1998 16:53:36 -0500 (EST) (envelope-from toor) Message-Id: <199804182153.QAA25065@dyson.iquest.net> Subject: Re: There was PicoBSD - let there be a Mini... In-Reply-To: from Andrzej Bialecki at "Apr 18, 98 11:27:54 pm" To: abial@nask.pl (Andrzej Bialecki) Date: Sat, 18 Apr 1998 16:53:36 -0500 (EST) Cc: luigi@labinfo.iet.unipi.it, freebsd-current@FreeBSD.ORG From: "John S. Dyson" Reply-To: dyson@FreeBSD.ORG X-Mailer: ELM [version 2.4ME+ PL38 (25)] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Andrzej Bialecki said: > On Sat, 18 Apr 1998, Luigi Rizzo wrote: > > > > * the whole installation (available in sysinstall :-) would place FreeBSD > > > on an existing DOS partition. Installation program would create the file > > > with filesystem on it (which will then be mounted on a vn(4) device). This > > > will require (well, it depends) ca. 16-24MB of free space on a DOS > > > partition. > > > > you'd need this much space just for the swapfile. > > As I said: it depends. E.g. PicoBSD doesn't use swap at all... So perhaps, > in case of X's, 8MB would be for swap and 16MB for the binaries. > As you probably know, FreeBSD-current has two interesting sysctl variables for swap control, for exactly the case of embedded applications: sysctl vm.defer_swapspace_pageouts Makes it improbable to use swap space, unless the system really needs it. sysctl vm.disable_swapspace_pageouts Makes the system avoid using swap totally. In the above cases, the paging algorithms are changed to be friendly for the application. -- John | Never try to teach a pig to sing, dyson@freebsd.org | it just makes you look stupid, jdyson@nc.com | and it irritates the pig. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message