Date: 18 Nov 1995 13:40:05 GMT From: hsu@cs.hut.fi (Heikki Suonsivu) To: clinet-list-freebsd-current@clinet.fi Subject: Re: 2.1-stable just hangs Message-ID: <HSU.95Nov18154005@shadows.cs.hut.fi> In-Reply-To: Tom Samplonius's message of 17 Nov 1995 20:14:09 %2B0200 References: <Pine.BSF.3.91.951117093137.15910B-100000@haven.uniserve.com>
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In article <Pine.BSF.3.91.951117093137.15910B-100000@haven.uniserve.com> Tom Samplonius <tom@uniserve.com> writes:
> sometimes (at elast 2 times a weak) a p55tp4xe with p90, 32mb Ram,
> 2940 , smc elite + just hangs.
ASUS SIS chipset based board + p90 + 64mB + 2 * NCR SCSI + probably smc isa
ethernet board. Around same frequency, but we also get disk errors
sometimes (seagate hawks currently).
> You can still enter commands on any ttys and ptys but as soon as the
> command is to be executed, the machine hangs. pressing reset is the
> only way to get it going again.
> Any hints on debugging this?
I have seen this before, with same motherboard and SCSI controller. It
turned out to be heat related. I just left the cover off the system, and
so far it is hasn't happened again.
The cause may be overheated disks getting looped, but there still is a bug
in kernel if the situation is not detected (it should do *something*, even
reboot would be better than getting hung).
I also saw this after a nfs server (FreeBSD 1.1.5.1) got its nfsd processes
killed somehow (out of swap, maybe), the -current machine deadlocked like
above after printing couple of nfs errors.
--
Heikki Suonsivu, T{ysikuu 10 C 83/02210 Espoo/FINLAND,
hsu@cs.hut.fi home +358-0-8031121 work -4513377 fax -4555276 riippu SN
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