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Date:      Thu, 17 Sep 2009 11:16:53 +0200
From:      Attilio Rao <attilio@freebsd.org>
To:        "C. C. Tang" <hiyorin@gmail.com>
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
Message-ID:  <3bbf2fe10909170216u29d994aj55c21efdfbc26ba5@mail.gmail.com>
In-Reply-To: <4AB1A838.2040406@gmail.com>
References:  <cf9b1ee00907061812r3da70018i1c8d8d12bb038a80@mail.gmail.com> <3bbf2fe10909121432x7bd4f7es497e9431c4e520d6@mail.gmail.com> <cf9b1ee00909121502v66566b46p754ed2f2e549555@mail.gmail.com> <4AB1A838.2040406@gmail.com>

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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


-- 
Peace can only be achieved by understanding - A. Einstein



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