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Date: Mon, 29 Jun 2015 11:19:35 +0100
From: Dietmar Eggemann <dietmar.eggemann@arm.com>
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To: "pang.xunlei@zte.com.cn" <pang.xunlei@zte.com.cn>,
        Abel Vesa <abelvesa@linux.com>
CC: Juri Lelli <Juri.Lelli@arm.com>,
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        Morten Rasmussen <Morten.Rasmussen@arm.com>,
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        Peter Boonstoppel <pboonstoppel@nvidia.com>,
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Subject: Re: [RFCv4 PATCH 00/34] sched: Energy cost model for energy-aware
 scheduling
References: <1431459549-18343-1-git-send-email-morten.rasmussen@arm.com>	<5552799E.2060507@nvidia.com>	<20150513134753.GA26396@e105550-lin.cambridge.arm.com> <CAEZQSscFKoang2X4E82xSXddcij=Ym5wyLGDLZwiwy5czJqAZg@mail.gmail.com> <OF2A9F9D14.FDD9C66B-ON48257E73.003184BC-48257E73.0031FA3D@zte.com.cn>
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On 29/06/15 10:06, pang.xunlei@zte.com.cn wrote:
> Hi Abel,
> 
> Abel Vesa <abelvesa@linux.com> wrote 2015-06-29 AM 04:26:31:
>>
>> Re: [RFCv4 PATCH 00/34] sched: Energy cost model for energy-aware 
> scheduling

[...]

>> I wasn't able to determine the cause from the line:
>>
>> 7de5:       49 0f a3 87 00 03 00    bt     %rax,0x300(%r15)
>>
>> Finally, the question I have is: Could this happen because I'm running
>> it from qemu?
>>
>> I hope all this info helps.
> 
> I've met this as well.
> 
> You can try to change "return -1;" in energy_aware_wake_cpu() to "return 
> target_cpu;"
> hope this may help.

Yeah, I also suppose that https://lkml.org/lkml/2015/5/14/330 cures it.

-- Dietmar

[...]