7.2-release/amd64: panic, spin lock held too long

C. C. Tang hiyorin at gmail.com
Thu Sep 17 03:08:53 UTC 2009

>> Dan, is that machine equipped with Hyperthreading?
>> Attilio
> Yes. It's an Intel Atom 330, which is a dualcore CPU with HT (4 cores
> visible in "top" as a result)

Yes, mine is also Atom 330.

I cannot test the patch because my machine is also in production now. 
But I have tested it with hyperthreading.
powerd with HyperThreading -> spin lock hold too long
powerd without HyperThreading -> no problem
no powerd with/without HyperThreading -> no problem

This blog article also describe the same situation:

By the way, I found that the readings of coretemp don't significant 
change when I enabled powerd so that I doubt that powerd may not be very 
useful for Atom CPU?

Thanks very much,

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