DragonFly bugs List (threaded) for 2008-04
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Re: vkernel livelocked and core dumped when killed on -HEAD
Matthew Dillon wrote:
>
> :Tried to cvs checkout the pkgsrc tree and managed to get "intr 1 at
> :40001/40000 hz, livelocked limit engaged!". After kill-ing it, it core
> :dumped. The backtrace repeats itself over and over, I uploaded kernel and
> :kernel.core to leaf:~rumko/crash/vkernel/30.04.2008/
>
> Did the vkernel actually lock-up or was it still responding? e.g. did
> you try ^Z'ing or ^C'ing the checkout? It is quite possible that
> the IO co-thread actually managed to exceed the livelock limit without
> it being a bug.
>
> The crash was due to the IO co-thread crashing. The IO co-thread took
> the shutdown signal from the vkernel when you killed it, but since it
> doesn't have a globaldata context that blew it up.
>
> I will mask the shutdown signal on the co-thread to fix the core
> dumping issue but we still need to investigate the livelock. Have
> you been able to reproduce it?
>
> -Matt
If I remember correctly, it was completely locked-up, but I will retry tonight.
--
Regards,
Rumko
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