Re: hangup (livelock) - db> prompt in endless loop

From: Alexey Shuvaev <shuvaev_at_physik.uni-wuerzburg.de>
Date: Sun, 11 Jan 2009 20:06:12 +0100
On Mon, Jan 05, 2009 at 04:51:04PM +0100, Attilio Rao wrote:
> 2008/12/19 Anton Yuzhaninov <citrin_at_citrin.ru>:
> > Anton Yuzhaninov wrote:
> >>
> >> My box with fresh current sometimes stops to respond.
> >>
> >> On screen in endless loop printed debugger prompt
> >>
> >> db>
> >>
> >> but I can't type anything here.
> >>
> >> Alt+Ctrl+Esc and Alt+Ctrl+Del don't stops this loop.
> >>
> >> How I can debug this problem?
> >>
> >> system: current from Mon Dec 15 16:16:23 MSK 2008 with GENERIC kernel,
> >> amd64, SMP.
> >>
> >
> > With more fresh current - Wed Dec 17 21:09:38
> > Panic not repeated.
> 
> This is probabilly a bug in the DDB lookup function.
> It just stops immediately or after a couple of commands? (and if it
> does, which comands exactly?)
> 
Hi!
I've seen this too - but only with one src checkout.
The symptoms as they are observed:
Leave the system with Xorg turned off (text mode), logout all users,
switch to ttyv0 (not sure about this) and go away. When you are back,
you see db> prompt running on the screen. This was amd64 CURRENT
with GENERIC kernel.
So, there was no user interaction (via keyboard).

Hope, this helps,
Alexey.
Received on Sun Jan 11 2009 - 18:37:08 UTC

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