From owner-freebsd-hackers Wed Jun 28 01:41:58 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.cdrom.com (8.6.10/8.6.6) id BAA28568 for hackers-outgoing; Wed, 28 Jun 1995 01:41:58 -0700 Received: from gndrsh.aac.dev.com (gndrsh.aac.dev.com [198.145.92.241]) by freefall.cdrom.com (8.6.10/8.6.6) with ESMTP id BAA28559 for ; Wed, 28 Jun 1995 01:41:54 -0700 Received: (from rgrimes@localhost) by gndrsh.aac.dev.com (8.6.11/8.6.9) id BAA09125; Wed, 28 Jun 1995 01:40:53 -0700 From: "Rodney W. Grimes" Message-Id: <199506280840.BAA09125@gndrsh.aac.dev.com> Subject: Re: keyboard locks up 950622-SNAP To: ahill@netspace.net.au (Anthony Hill) Date: Wed, 28 Jun 1995 01:40:53 -0700 (PDT) Cc: tom@uniserve.com, jan@bagend.atl.ga.us, hackers@freebsd.org In-Reply-To: from "Anthony Hill" at Jun 28, 95 06:20:14 pm X-Mailer: ELM [version 2.4 PL24] MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Content-Length: 1145 Sender: hackers-owner@freebsd.org Precedence: bulk > > > > > > > On Sun, 25 Jun 1995, Jan Isley wrote: > > > > > The first try was just installing bin. After printing xxxx blocks > > > on debug window I got Fatal trap 12: page fault while in kernel mode. > > > > Sounds like hardware. Try disabling the cache. > > > What is the problem with FreeBSD and caches - I could not install, and > cannot rebuild a kernel with my cache turned on ! Turning it off is a > pretty easy fix - but I also take a pretty big performance hit. > > What does it mean if your cache is causing these problems ? It means more than likely one of two things, either you have a marginal cache SRAM that when pounded on as hard as FreeBSD pounds on a cache it fails and corrupts data, or you have a bus master DMA cache coherency problem that fails to invalidate data in the cache. What motherboard and/or chip set are you running on? I will see if it is in my great mass of grey matter that stores the database for known problematic systems :-) ? -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Reliable computers for FreeBSD