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- From: terry@cs.weber.edu (A Wizard of Earth C)
- Subject: Re: Occasional system hangs
- Message-ID: <1992Dec14.175811.8493@fcom.cc.utah.edu>
- Sender: news@fcom.cc.utah.edu
- Organization: Weber State University (Ogden, UT)
- References: <andrewh.724059111@bruce.cs.monash.edu.au> <1gaclpINN84v@hrd769.brooks.af.mil> <1992Dec11.142822.6314@crash>
- Date: Mon, 14 Dec 92 17:58:11 GMT
- Lines: 37
-
- In article <1992Dec11.142822.6314@crash> fpm@crash.cts.com (Frank Maclachlan) writes:
- >> I don't think more RAM will help. I have 32M of RAM and and 32M swap
- >>partition. It still hangs. nroff is the usual culprit for me.
- >
- >I had the same problem. My system system would lock up completely from
- >time to time. Nroff seemed to be particularly troublesome. I resolved
- >it by removing my ULSI 80387 fpu. You can see if this is the problem
- >by modifying npxprobe() in '/sys/i386/isa/npx.c' to not find the fpu
- >and return 0. This causes the fpu to be ignored.
-
- Is there a reliable way to identify this particular chip? With the number
- of problems reported, it would seem worthwhile to identify FPU type, and
- emulate only those instructions not supported. This would allow the poor
- people stuck with the chip to derive some benefit from it, as well as
- not requiring major surgery to get a machine with one booted and a kernel
- set up to ignore the FPU before another surgical procedure to reinsert it.
-
- Another useful approach (that would require full acceptance of Julians
- boot blocks -- as in replacing the wdboot code as well) would be to
- allow "arguments" on boot to the kernel, like "NOFPU" and "10BITIO" for
- people with bad FPU's or single sigma 386's. Of course this would also
- require the ability to put these flags in a file somewhere so the
- kernel could have them "on" by default.
-
-
-
- Terry Lambert
- terry@icarus.weber.edu
- terry_lambert@novell.com
- ---
- Any opinions in this posting are my own and not those of my present
- or previous employers.
- --
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- "I have an 8 user poetic license" - me
- Get the 386bsd FAQ from agate.berkeley.edu:/pub/386BSD/386bsd-0.1/unofficial
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