Re: EM stability


After the last hang I added giant locks back in and the machine has
been up since.

I don't have a serial console, just a graphic console. When the
machine hangs it stops replying to ethernet packets at all protocol
levels and doesn't respond to keyboard input in any way, virtual
console or otherwise. If I run a script of the form
while(1)
sleep 1
date >> datelog
end

the file stops updating when the machine hangs.

I will define the debugger in the kernel (options DDB, right?), attach
a serial console, and do what I can to get more information on the
problem.

-Barry


Jack Vogel writes:
On 11/10/06, Barry Boes <barry.boes@xxxxxxxxxxxxx> wrote:

Luck ran out. Hard "must press the reset button" hang. No console
messages. The system was idle at the time.
Is there anything you'd like me to do to attempt to narrow down the
problem or get debugging output? I do not know if the freeze was
related to em or something else.

Is this a machine running some graphic head? If not can you see anything
on the console? Are you sure the machine is dead, like can you get in
over the network... ? One thing I often do when you are dealing with
unpredictable hangs is run 'vmstat 3' on one of the virtual terminals.

You might also define the kernel debugger into your kernel, its best to have
a serial console for this, I've seen the hardware console be locked but the
serial will still work.

The only way we will track this down is thru repetitive reproduction I'm
afraid.

Jack
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