Date: Wed, 28 Jun 1995 01:40:53 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: ahill@netspace.net.au (Anthony Hill) Cc: tom@uniserve.com, jan@bagend.atl.ga.us, hackers@freebsd.org Subject: Re: keyboard locks up 950622-SNAP Message-ID: <199506280840.BAA09125@gndrsh.aac.dev.com> In-Reply-To: <Pine.BSF.3.91.950628181643.10753A-100000@stang.netspace.net.au> from "Anthony Hill" at Jun 28, 95 06:20:14 pm
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> > > > > > > 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
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