[FreeBSD 5.3-RC2] Processes STILL hanging in unkillable state

[Julian Elischer]

Ken Smith wrote:

>On Thu, Nov 04, 2004 at 03:34:26PM +0100, Michael Nottebrock wrote:
>  
>
>>On Thursday, 4. November 2004 07:31, Alex Dupre wrote:
>>    
>>
>>>Michael Nottebrock wrote:
>>>      
>>>
>>>>Could all people who are seeing this please post their kernel
>>>>configurations, sysctl.conf and perhaps some system details (platform,
>>>>UP/MP), too.
>>>>        
>>>>
>>Looking at all of these, I fail to see anything "special" that all these 
>>machines have in common - looks like there's a full range from tuned 
>>configurations with eyebrowraisers like PREEMPTION to almost-unmodified 
>>GENERIC and pretty different hardware, too. :(
>>
>>So if anybody spots something interesting here after all, or thinks Marc 
>>Ramirez backtraces / debug sessions reveal anything about the bug, please 
>>take over...
>>    
>>

if you can get to teh kernel debugger on a serial link, (there is a 
sysctl to drop yuo into it) then
the appropriate lines of 'ps' would be interesting.
also x/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx {address}
where address is the address of the ksegrp in question (in threaded 
processes) myght be interesting.
(you can get that from the ps in ddb)

>>    
>>
>
>In particular if you manage to wedge processes in an unkillable state
>the output of "ps -o f -l" might be useful.  I'd like to see all of the
>flags set for a process that gets wedged.
>  
>

please also add the -H option to show the threads in question.