From owner-freebsd-chat Wed Mar 13 00:56:20 1996 Return-Path: owner-chat Received: (from root@localhost) by freefall.freebsd.org (8.7.3/8.7.3) id AAA15252 for chat-outgoing; Wed, 13 Mar 1996 00:56:20 -0800 (PST) Received: from bunyip.cc.uq.oz.au (pp@bunyip.cc.uq.oz.au [130.102.2.1]) by freefall.freebsd.org (8.7.3/8.7.3) with SMTP id AAA15246 for ; Wed, 13 Mar 1996 00:56:16 -0800 (PST) Received: from bunyip.cc.uq.oz.au by bunyip.cc.uq.oz.au id <08181-0@bunyip.cc.uq.oz.au>; Wed, 13 Mar 1996 18:55:15 +1000 Received: from orion.devetir.qld.gov.au by pandora.devetir.qld.gov.au (8.6.10/DEVETIR-E0.3a) with ESMTP id RAA18346; Wed, 13 Mar 1996 17:53:56 +1000 Received: by orion.devetir.qld.gov.au (8.6.10/DEVETIR-0.3) id RAA20124; Wed, 13 Mar 1996 17:54:13 +1000 Date: Wed, 13 Mar 1996 17:54:13 +1000 From: Stephen McKay Message-Id: <199603130754.RAA20124@orion.devetir.qld.gov.au> To: Jon Loeliger cc: freebsd-chat@freebsd.org, syssgm@devetir.qld.gov.au Subject: Re: historical note.. X-Newsreader: NN version 6.5.0 #1 (NOV) Sender: owner-chat@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Jon Loeliger wrote: >So, like "Jonathan M. Bresler" was saying to me just the other day: >> Julian Elischer wrote: >> > >> > I just found this in the BSD4.3 kernel I'm trying to debug.. >> > it's from vmparam.h.. >> >> HEY! somebody took this out fo the FreeBSD sources! not fair. >> >> i want it back. please submit a diff. ;^) > >I was curious too. So I fired off a piece of mail to >our eternally good buddy Keith. With all due respect, >I forward his private mail to me. He says: > > To: jdl@jdl.com > From: Keith Bostic > Subject: Re: Historical note... > Date: Mon, 11 Mar 1996 15:58:45 EST > ---------------------------------------------------------------- > > [ You don't just happen to know who wrote this, do you? :-) > > But, to be a '81 era comment, it's gotta be more like 4.1, > > (or 2.9?) or earlier, right? -- jdl ] > > Bill Joy checked in the SCCS delta, presumably he wrote the text. > And, yes, this comment disappeared before the 4.2 release, so it's > not a 4.3BSD kernel. > > --keith > >Oh wow! For contrast, here is the appropriate bit from 386BSD 0.1 in /sys/sys.386bsd/i386/include/vmparam.h (yes, I keep some weird old cruft): /* * Just for fun: current memory prices are 4600$ a megabyte on VAX (4/22/81), * so we loan each swapped in process memory worth 100$, or just admit * that we don't consider it worthwhile and swap it out to disk which costs * $30/mb or about $0.75. * { wfj 6/16/89: Retail AT memory expansion $800/megabyte, loan of $17 * on disk costing $7/mb or $0.18 (in memory still 100:1 in cost!) } */ #define SAFERSS 8 /* nominal ``small'' resident set size protected against replacement */ Bill got this from net/2, didn't he? Net/2 was post-4.3, true? What I'm building to is the near-to-impossible suggestion that Keith might be wrong. Still, that's not my main point. I find this sort of buried historical trivia fascinating, and would love to have it re-inserted, together with a 1996 data point. That is, of course, if we can find an appropriate bit of code to attach it to, since SAFERSS no longer exists. Stephen.