Date: Sun, 21 May 1995 12:44:11 -0700 (PDT) From: "Rodney W. Grimes" <rgrimes@gndrsh.aac.dev.com> To: tege@cygnus.com (Torbjorn Granlund) Cc: davidg@Root.COM, sef@kithrup.com, freebsd-bugs@FreeBSD.org Subject: Re: MAJOR problem with FreeBSD-2.0-RELEASE Message-ID: <199505211944.MAA03687@gndrsh.aac.dev.com> In-Reply-To: <199505211816.LAA23750@cygnus.com> from "Torbjorn Granlund" at May 21, 95 11:16:04 am
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> > We already tried with a kernel without "BOUNCE_BUFFERS". The kernel still > panics for lots and lots of commands. Now the panics are differewnt, things > like "page fault while in kernel mode". I cannot take out 16M of memory, > since the two 16M SIMMS are both needed for the Triton chip set to be happy. > (And I don't have any 8M SIMMs to try.) If this is the Intel Zappa board, make sure you are using TIN connectors on the SIMM modules, if they are gold you may have a very serious memory system problem. (The data book that came with your Zappa board will say to use only Tin SIMM modules, believe it!!!). This really smells like memory system problems. Are you running a 90Mhz or 100Mhz CPU?? The Zappa board is not rated for 100Mhz operation (or at least the 2 board I looked at clearly stated 75 or 90Mhz but not 100 Mhz.) > Another problem is the driver for the buslogic card (bt742.c?). It doesn't > do synchronuous SCSI with my Buslogic KT-946C. I cannot get to > ftp.cdrom.com, so I cannot check if the driver is improved. Is it? Humm.. been running bt946's in sync mode for over a year, what version of the board/BIOS/firmware do you have? Do you have the sync options enabled on the bt946C? > Note that we observed the exact same behaviour when using FreeBSD 2.0 on a > completely different system (different CPU, motherboard, disks, SCSI card) . > This makes it unlikely to be hardware problems. Ahh... FreeBSD 2.0, been a long time since I've run it, could very well be problems in that release. Though I have run make world using it to upgrade a system to 2.0 current back in February (initial boot strapping of my build environment here after being gone for some time). That was run on a Opti based P54C-90 with a BT946C and 16MB, would not have seen a bounce buffer bug :-(. -- Rod Grimes rgrimes@gndrsh.aac.dev.com Accurate Automation Company Custom computers for FreeBSD
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