Date: Sun, 3 Dec 95 21:14 WET From: uhclem%nemesis@fw.ast.com (Frank Durda IV) To: bugs@freebsd.org, davidg@root.com Subject: Re: Mission Impossible-style crashes on 2.1.0 Message-ID: <m0tMRM4-000CJiC@nemesis.lonestar.org>
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[2]These are *very* stock systems where the operating system is concerned.
[2]Kernels have been recompiled to eliminate drivers not in use, but that is
[2]it. Again, X is not in use. C-news, inn, smail and a few other odds and
[2]ends are the applications that are present. Some have network boards
[2]and drivers loaded, but are not connected to an active network.
[3] So you're saying above that the machines do all of the email and news
[3]via UUCP? Are you using the MMAP option with INN? What kind of systems are
[3]these (I mean CPU and motherboard)? Are they all the same?
1. Only two machines have INN and MMAP is disabled on both. Also,
those machines don't see much traffic and don't get as many crashes
as others.
2. The machines that crash more are running CNEWS and using UUCP to
move news around (gziped), with modems sitting on 38400 DTEs
(WorldBlazers, V.32bis or V.34 modems). These machines are
busy and have the most crashes. The drives are always seeking.
3. The MLBs include, Morrisons-100/120(?), Micronics 486 256K L2 cache,
some mystery-AST Pentium-75 MLB ("Rattler"), another AST 486 MLB,
and GRiD/DEC 486-33 with 64K or 128K IDT/T-485 cache modules.
I think that covers all the combinations. All of these systems ran
2.0.5 well for at least 90 days before the migration to 2.1.0.
All board have 16550 UARTS for serial I/O.
They ran the same mix of applications, except for the INN systems
that used to be CNEWS also, and are being migrated to INN.
4. No system or drive is low on disk space as someone suggested. All
partitions (slices if you prefer) have at least 25 Meg free
at all times, not including the last 10%. Most partitions (like
news and spool partitions) have a few hundred meg free.
5. One Morrison and one GRiD/Dec system have switched back to 2.0.5
kernels and after four days still have no crashes. All other
systems have crashed at least once in that amount of time.
It has been suggested that a panic is occurring but the messages are
not being displayed for some reason. Bruce suggested a serial console
might have better luck at getting panic information, so I am setting up a
DOS box with PC-PLUS in log mode so that I can capture any panic that
happens to be sent out that way.
Frank Durda IV
uhclem%nemesis@fw.ast.com
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