Kernel panic on PowerEdge 1950 under certain stress load

[Borja Marcos]

On 22 Sep 2007, at 00:26, Benjie Chen wrote:

> FreeBSD 6.2 on PowerEdge 1950, RAID1 setup with mfi driver  
> (PERC5i). 4GB
> RAM. I am currently running i386, and not amd64, due to various  
> reasons.
>
> Kernel panic is at 0xC066C731, which from nm shows it's in  
> mtx_lock_spin
>  c066c7b4 T _mtx_lock_spin
>  c066c85c T _mtx_unlock_sleep
>
> So this could mean that independent stress tests will not result in  
> panic if
> there aren't enough concurrency to cause the problem.

I don't have the exact IP address involved, but we experienced  
consistent panics in two heavily loaded mail servers (same hardware  
models, Dell Powereedge) runnning Postfix and FreeBSD 6.2.

Suspecting an issue with the IP stack and smp I tried to set  
"debug.mpsafenet=0" and the problems are gone. Of course I've lost  
some performance, but the systems have been solid for some weeks so far.





Borja.

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