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Date: Thu, 17 Sep 2009 18:31:33 +0800
From: "C. C. Tang" <hiyorin@gmail.com>
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To: Attilio Rao <attilio@freebsd.org>
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Cc: FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org>,
	Dan Naumov <dan.naumov@gmail.com>
Subject: Re: 7.2-release/amd64: panic, spin lock held too long
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Attilio Rao wrote:
> 2009/9/17 C. C. Tang <hiyorin@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
> 
> 
No, the kernel is not patched.

C.C.