Re: dual CPU system hangs

[Christian Groessler <chris%groessler.org@localhost>]

On 07/19/13 20:53, Christos Zoulas wrote:
> In article <51E98526.4000702%groessler.org@localhost>,
> Christian Groessler  <chris%groessler.org@localhost> wrote:
> > On 07/19/13 19:27, Christos Zoulas wrote:
> > > In article <51E9498A.9070305%groessler.org@localhost>,
> > > Christian Groessler  <chris%groessler.org@localhost> wrote:
> > > > On 07/17/13 17:08, Christos Zoulas wrote:
> > > > > In article <51E66514.5080600%groessler.org@localhost>,
> > > > > Christian Groessler  <chris%groessler.org@localhost> wrote:
> > > > > > Is there a way to enter DDB with an USB keyboard? In the FAQ I only
> > > > > > found a way with an ADB keyboard (Command-Option-Power)?
> > > Looks like you are running out of memory. Can you print stack traces
> > > from ddb of the two processes that are stuck in xchicv (cross-call).
> >
> > This brings us back to my original question (see above) :-)
> Well, ddb from usb is not really working ATM for any platform. You definitely
> can't recover once you enter it (because of locking issues), and sometimes
> on my amd64 entering it produces an unresponsive keyboard. So I would say no.


Ok, but there is a way to get into ddb? How did you do it on your amd64?
I don't need to recover and if I can manage to get the stack traces it
would be ok, otherwise...


> The other solution would be a serial console I guess.

... the machine only has a phone (modem) socket on the outside. Don't know
if I could connect a RS232 cable somehow in the inside.
A serial PCI card would be handy, I have one, but I think it's broken.

regards,
chris