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

C. C. Tang hiyorin at gmail.com
Fri Sep 18 11:25:28 UTC 2009

> Attilio Rao wrote:
>> 2009/9/17 C. C. Tang <hiyorin at gmail.com>:
>>>>> 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
>> But these are with the last patch I posted in?
>> (specifically, for 7.2:
>> http://www.freebsd.org/~attilio/sched_ule.diff
>> )
>> So with the patch in, powerd and hyperthreading on you still get a 
>> deadlock?
>> Attilio
I have patched the sched_ule.c and did a make buildkernel & make 
installkernel (is buildworld and installworld necessary?), rebooted and 
the machine is running now.
I will post here again if there is any update.


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