Deadlock FreeBSD 6 / 7

[Armin Pirkovitsch]

Robert Watson wrote:
> 
> On Sun, 1 Jan 2006, Armin Pirkovitsch wrote:
> 
>> Robert Watson wrote:
>>
>>>> I guess one of those parts creates the trouble, but I have no idea 
>>>> how to trace it... Is there a way to run the whole thing in some 
>>>> kind of debugger? Or is there a diffrent way to locate the problem?
>>>
>>>
>>> The usual first step to debug a deadlock, if WITNESS or INVARIANTS 
>>> doesn't trigger dropping you into the debugger, is to break into the 
>>> debugger using a console or serial break.  To do this, you need to 
>>> compile:
>>
>>
>> I added options BREAK_TO_DEBUGGER and used make buildkernel and make 
>> installkernel.debug and was not able to reconstruct the crash. I guess 
>> the debug stuff slowed it down enough to not come to the bug... (even 
>> installworld worked fine, which usually kills it) So this is what I 
>> feared - the debug stuff changes the timing by slowing it down which 
>> makes it pretty hard to reconstruct the crash... Is there any other 
>> way? (btw. it's a notebook, so there is no old serial bus)
> 
> 
> Try compiling in only options DDB and BREAK_TO_DEBUGGER.  Even without 
> the fully debugging features on, it may be enough to give us some 
> initial insight into the source of the problem.

without installkernel.debug (just installkernel) I was able to 
reconstruct the crash, but again was not able to enter the debugger.

> Does your notebook have firewire support?

Yes it has and one my other machines has too if that is any help?

-- 
Armin Pirkovitsch
a.pirko at inode.at