Return to BSD News archive
Path: sserve!newshost.anu.edu.au!munnari.oz.au!metro!news.cs.su.oz.au!harbinger.cc.monash.edu.au!yeshua.marcam.com!zip.eecs.umich.edu!newsxfer.itd.umich.edu!newsrelay.iastate.edu!news.iastate.edu!ponderous.cc.iastate.edu!michaelv From: michaelv@iastate.edu (Michael L. VanLoon) Newsgroups: comp.os.386bsd.questions Subject: Re: FreeBSD died on P560 with 32megs ram Date: 22 Mar 94 16:47:32 GMT Organization: Iowa State University, Ames, Iowa Lines: 33 Message-ID: <michaelv.764354852@ponderous.cc.iastate.edu> References: <1994Mar17.095541.29513@paramount.nikhefk.nikhef.nl> <MARK.876.2D87ACA4@ardsley.business.uwo.ca> <2mlb4o$sfh@news.ysu.edu> <ZQ+sgD2.dysonj@delphi.com> NNTP-Posting-Host: ponderous.cc.iastate.edu In <ZQ+sgD2.dysonj@delphi.com> John Dyson <dysonj@delphi.com> writes: >Christopher L. Mikkelson <ap713@yfn.ysu.edu> writes: > >>Is this something new in FreeBSD? My dad had 386BSD 0.1 on a machine with a >>1542C and 24MB of RAM without any trouble. He currently has (dare I say it) >>Linux running on the same machine without trouble. Would NetBSD support >>>16MB? >I don't think that *BSD has any support for ISA & bus mastering DMA > 16MB >yet. FreeBSD will probably have it in V1.2. It is curious that >386BSD 0.1 works > 16MB, maybe the buffers were all pre-allocated at >startup (I think that NetBSD does this) and he just did not happen to >use the swap-pager above 16MB??? This is probably exactly what is happening. With 24meg of RAM, he's almost surely not paging/swapping. You'd have to push your machine pretty hard with X running to get it to start paging in 24meg. Rest assured that if he *does* start to get the machine swapping, he *WILL* crash. NetBSD does not yet support bounce buffers to the lower 16meg. In your case it would work until you started swapping. A better solution, though, is to get a 32-bit SCSI controller (either EISA, VLB, or PCI bus [I don't know if anyone yet has run a PCI bus controller to verify that they work without ugly hacks]). -- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Michael L. VanLoon Iowa State University Computation Center michaelv@iastate.edu Project Vincent Systems Staff Free your mind and your machine -- NetBSD free Un*x for PC/Mac/Amiga/etc. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -