Very Computer

i have one problem machine where i have no more idea what to do. this is
a Tyan 1662 SMP Motherboard with 512MB Ram and 2 Pentium Pro 200 CPU`s.
the machine runs fine under heavy load for 6-14 days. then it simply
freeces up. the only chance is to power off and restart. witch gives
sometimes problems when rebooting. till now fsck repaired everything.
machine also has a adaptec 2940u2w controller with 2*8GB hdu's.

i think i will install a single user kernel for now. but this is really
downgrading :-(. and the machine needs both cpu's because of the high
loadage.

problem already happend with 3.3. continues now with 3.4.

many thanks for any ideas.

best regards,

karl

Try installing a kernel with DDB installed. When the machine freezes
up press CTRL-ESC to break to the de*. They type "t" to get a trace
of where the kernel was. Then do "c" to continue. Do this a few times to
see where the kernel is stuck.

If you can't break to the de*, this means the kernel is stuck
somewhere with interrupts disabeled, which will make the problem hard
to find ;-(

        David.

Following up on David's suggestion.  If you are running X11 on the
system, you won't be able to break to the de*i at the console.  
You might want to set up a serial console for debugging.  See the
handbook for details.

--
Steve

Ok, I'm probably wrong because I know nothing about these things but I'm
going to say it anyway:

There was discussion on the linux kernel mailinglist about if some stuff
about whether an optimization to some smp spinlock asm code on intel
architecture should be used. They came to the conclusion that it works
on all processors but older pentium pros causing random crashes on these
machines. Someone mentioned that FreeBSD uses this optimization, maybe
this could be the cause?

--
        Wolter

I temporary have installed a single cpu kernel. This worked perfect
till today. But with the single cpu kernel the machine reboots. Again
no entry in the log files. Because of the weekend i was not in the
office, but it looks like a hard boot. Not really sure where to start
searching.....

just started a cvsup to do a make world tomorrow. Will then compile a
new kernel too and restart the machine. Will wait what happens
next.....

best regards,

karl

Quote:>>>>>>>>>>>>>>>>>> Ursprngliche Nachricht <<<<<<<<<<<<<<<<<<

(Steven G. Kargl) zum Thema Re: SMP freeces up after 6-14 days
(3.3/3.4):