Date: Tue, 14 Mar 1995 07:51:27 -0500 (EST) From: Peter Dufault <dufault@hda.com> To: tege@cygnus.com (Torbjorn Granlund) Cc: hackers@FreeBSD.org, tege@cygnus.com Subject: Re: Frequent panics in 2.0-RELEASE Message-ID: <199503141251.HAA06512@hda.com> In-Reply-To: <199503141039.CAA27452@cygnus.com> from "Torbjorn Granlund" at Mar 14, 95 02:39:28 am
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Torbjorn Granlund writes: > > Starting with the floppies from ftp.freebsd.org, via the full 2.0 CDROM > distribution, I am trying to build a mildly customized kernel. > Unfortunately, I cannot get past the compile of the new kernel, since the > existing kernel (i.e., the one from the distribution) keeps panicing. > > Here is what I get on the screen (somewhat abridged): > > Fatal trap 1: privileged instruction fault while in kernel mode > instruction pointer = 0x8:0xf013d400 > code segment = base 0x0, limit 0xfffff, type 0x1b > = DPL 0, pres 1, def32 1, gran 1 > processor eflags = resume, IOPL = 0 > current process = Idle > interrupt mask = > > panic: privileged instruction fault > syncing disks > > Fatal trap 12, ... etc etc > > My system has an Asus PCI/I-486SP3G motherboard with and integrated NCR SCSI > 2 controller and a 100 MHz Intel 486DX4, 256 kB L2 cache, and 16 Mb DRAM. I > have set the cache to do write-through instead of the defalt copy-back. (In > the BIOS that is, maybe the kernel overrides this.) The only hard drive is > a 500Mb SCSI 2 device. I borrow a test system with a DX4-100 (a Compaq Presario) and have stopped using it because I get a "privileged instruction fault while in kernel mode" also. The problem goes away when go back to the regular processor. And of course: 'It works "fine" running Microsoft Windows' I've seen references to problems with the first step of the DX4-100, and that is what mine is, but I haven't persued this much further yet.. What does it say when it probes your CPU? -- Peter Dufault Real Time Machine Control and Simulation HD Associates, Inc. Voice: 508 433 6936 dufault@hda.com Fax: 508 433 5267
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