home *** CD-ROM | disk | FTP | other *** search
- Newsgroups: comp.unix.bsd
- Path: sparky!uunet!psinntp!dg-rtp!ponds!rivers
- From: rivers@ponds.uucp (Thomas David Rivers)
- Subject: Hanging problem solved (work-around at least).
- Message-ID: <1992Aug15.010923.6242@ponds.uucp>
- Summary: Problem narrowed down to '387 co-processor
- Keywords: hangs, bugs, 387 coprocessor
- Date: Sat, 15 Aug 1992 01:09:23 GMT
- Lines: 35
-
-
- Well, taking a tip from Doug Anson's (danson@lgc.com) post to this
- news group I decided to try something out.
-
- I had npx.c always return 0 from the probe for the existence of a
- math-coprocessor (I'm too lazy to pull chips out and stick them in again).
-
- and *voila* ..... The kernel no longer crashes.
-
- I'm running a kernel w/ the rlist fixes, and wd fixes (both of them) and
- the MAX_KMAPENT fix (set to 1000), and the other bufpages fix
- Bill Jolitz mentioned. It has been doing nothing but re-compiling the
- kernel over and over again for 14 hours, so I feel rather confidently
- that the problem has been isolated.
-
- Also, I had put in the npx.c fix mentioned by James Van Artsdalen
- (james@raid.dell.com) - but that doesn't correct the hanging problem.
- I don't know what this means to 486DX people; since you can't pull
- your "coprocessor" out in that case.
-
- Just to begin keeping data points on '387 problems, I'm running
- a 20mhz 386 with a ULSI 33mhz coprocessor.
-
- If you have a 387 coprocessor, and experience kernel lockups with no
- recourse, I would suggest you try pulling out the chip, or
- altering npx.c as I have.
-
- Unfortunately, I will be away on a conference this week, and will have
- no opportunity to try and diagnose the details of the problem - if anyone
- does, please post what you find.
-
- - Dave Rivers -
- (rivers@ponds.uucp)
-
-
-