From owner-freebsd-questions Tue Jan 14 16:28:59 1997 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.4/8.8.4) id QAA19187 for questions-outgoing; Tue, 14 Jan 1997 16:28:59 -0800 (PST) Received: from agora.rdrop.com (root@agora.rdrop.com [199.2.210.241]) by freefall.freebsd.org (8.8.4/8.8.4) with SMTP id QAA19178 for ; Tue, 14 Jan 1997 16:28:56 -0800 (PST) Received: from svpal.svpal.org by agora.rdrop.com with smtp (Smail3.1.29.1 #17) id m0vkJDK-0008wjC; Tue, 14 Jan 97 16:28 PST Received: (from mbranch@localhost) by svpal.svpal.org (8.7.5/8.7.3) id QAA22174; Tue, 14 Jan 1997 16:22:39 -0800 (PST) Date: Tue, 14 Jan 1997 16:22:38 -0800 (PST) From: Mike Branch Subject: Re: the UNIX hole To: Greg Lehey cc: FreeBSD Questions In-Reply-To: <199701130102.TAA00396@papillon.lemis.de> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-questions@FreeBSD.org X-Loop: FreeBSD.org Precedence: bulk hi, there used to be a space in the high memory area, where device bios often loaded in a non-contiguous fashion. This was refered to as "the hole." (as I understand it). I think it is between the end of the kernel and the system bios (f000 on x86). Please correct me if you know different. Mike ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;; Michael A. Branch "I turn big problems ;; ;; into little problems." ;; ;; ;; ;; mbranch@swordfish.eecs.berkeley.edu ;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; On Sun, 12 Jan 1997, Greg Lehey wrote: > Mike Branch writes: > > hi, > > could anybody give an explanation about the UNIX "hole"? > > Is the hole filled in current versions of UNIX? Is it > > still advisable to configure devices in contiguous memory > > locations when building a kernel? > > (You can tell how far behind I am with my mail :-() > > I didn't see a reply to this one, and since I've never heard of the > "UNIX hole", I thought I'd ask you what you mean. > > Greg >