From owner-freebsd-hackers Wed Dec 18 13:58:29 1996 Return-Path: Received: (from root@localhost) by freefall.freebsd.org (8.8.4/8.8.4) id NAA00353 for hackers-outgoing; Wed, 18 Dec 1996 13:58:29 -0800 (PST) Received: from rah.star-gate.com ([204.188.121.18]) by freefall.freebsd.org (8.8.4/8.8.4) with ESMTP id NAA00348 for ; Wed, 18 Dec 1996 13:58:21 -0800 (PST) Received: from rah.star-gate.com (localhost.star-gate.com [127.0.0.1]) by rah.star-gate.com (8.7.6/8.7.3) with ESMTP id NAA06578 for ; Wed, 18 Dec 1996 13:58:00 -0800 (PST) Message-Id: <199612182158.NAA06578@rah.star-gate.com> X-Mailer: exmh version 1.6.9 8/22/96 To: hackers@freebsd.org Subject: mmap and meteor. Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 18 Dec 1996 13:58:00 -0800 From: Amancio Hasty Sender: owner-hackers@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Prabably the problem is on the VM system given that mmap seems to work the first few times and then it fails to map all the pages requested. Amancio james@miller.cs.uwm.edu said: > From: Jim Lowe To: hasty@rah.star-gate.com > Subject: Re: Jim's mixer (jmix) > Yes, I beleive there is something wrong with the mmap system call and > the vm system. I can't tell exactly what it is or why it happens, > but it is a pain in the butt. > About a month ago, I started to investigate the problem, but havn't > been able to pin the darn thing down. I suspect John Dyson might be > able to find it, but I don't think he has a meteor card or uses mmap > quite the way we do. It is a real twisted type problem and the > solution doesn't seem real obvious to me.