Kernel hang on 6.x

[John Baldwin]

On Thursday 14 December 2006 16:06, R. Tyler Ballance wrote:
> 
> On Dec 14, 2006, at 1:05 PM, Brian Dean wrote:
> 
> > Hi,
> >
> > We're experiencing a kernel hang on a 6.x quad processor Sun amd64
> > based system.  We are able to reproduce it fairly reliably, but the
> > environment to do so is not easily replicatable so I cannot provide a
> > simple test case.  However, I have been able to build a debug kernel
> > and when the system "hangs", I can break to the debugger prompt.  But
> > once there, I'm not sure what to do to isolate where the system is
> > hung up.  I have confirmed that the hang occurs in both SMP and
> > uniprocessor mode.  Here are some system details:
> 
> 
> I think you'll need to ship this machine to my house for further  
> um....erm, diagnostics, yes, that's it ;)
> 
> 
> On a more serious topic, can you paste the output from:
> 
> 
> ddb> show pcpu
> ddb>allpcpu
> ddb>traceall
> ddb>show alllocks
> ddb>show lockedvnods
> 
> Just curious as to whether those would show more info, because you're  
> right, that trace is about as informative as new printer paper :)

The 'traceall' seemed to miss several threads actually (like pid 18).
Can you get a 'ps'?  Also, are you able to get a kernel dump when this
happens?

-- 
John Baldwin