WITNESS bug (Was Re: kern/68442: panic - acquiring duplicate lock of same type: "sleepq chain")

[Harald Schmalzbauer]

Am Sonntag, 4. Juli 2004 21:42 schrieb Daniel Lang:

[...]
> >
> > Btw, the addition of WITNESS is indeed something that has
> > changed since all the trouble started. When the machine was
> > still running in a stable fashion I did not have WITNESS
> > enabled. I did it, when I put in more memory and built a PAE
> > kernel and left it in since.
>
> [..]
>
> I am now more convinced, that the bug is indeed in WITNESS itself.
> Without WITNESS the machine is running rock stable again now
> for three days. With WITNESS enabled it has crashed within minutes,
> uptime at most a few hours. Also the stack trace I got points
> into WITNESS code.

I'd like to contribute a completley unqualifide note:
When I build a -current kernel with WITNESS and I use the nvidia driver (not 
the GL-Part, just the kernel module and the x-driver) the system freezes 
without panic or anything else, only a powercycle helps.
After removing WITNESS the box is running fine. Now for about 3 Weeks without 
any problem.....

If I can do any tests please give me instructions, I'd love to help.

-Harry

>
> For me, I can run without WITNESS, but I guess that's not how it
> is supposed to be....
>
> Tomorrow I will reinsert the additional memory and re-enable PAE,
> but certainly not WITNESS. If it still runs stable, I will return it
> to full production.
>
> If anyone is still interested in locking into this bug, please let
> me know. I still have the crash-dump around.
>
> Cheers,
>  Daniel
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