linux-kernel - Re: Suspend-resume failure on Intel Eagle Lake Core2Duo

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Date:   Mon, 31 Jul 2017 11:41:57 +0300
From:   Tomi Sarvela <tomi.p.sarvela@...el.com>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Martin Peres <martin.peres@...ux.intel.com>,
        jeffy.chen@...k-chips.com, linux-kernel@...r.kernel.org
Subject: Re: Suspend-resume failure on Intel Eagle Lake Core2Duo

On 31/07/17 11:29, Thomas Gleixner wrote:
> On Mon, 31 Jul 2017, Tomi Sarvela wrote:
>> On 31/07/17 10:45, Thomas Gleixner wrote:
>>> On Mon, 31 Jul 2017, Tomi Sarvela wrote:
>>>> On 28/07/17 19:26, Thomas Gleixner wrote:
>>>>> Did you change anything else compared to the tests before ?
>>>>
>>>> I did check that the problem persisted in linus-HEAD before testing your
>>>> patch. The testing was done in order (reading from console logs I happen
>>>> to
>>>> still have in one window):
>>>
>>> What I still do not understand is why this would affect the suspend path in
>>> any way.
>>>
>>> Can you remove the previous patch and apply the one below. If it resumes,
>>> please provide the data from the trace buffer again.
>>
>> No such luck. ELK hangs in the suspend-test with earlier patch removed, this
>> added. Checked again that the power-led is on, no serial output.
>>
>> Tree not pulled: still testing against the previous head -rc2, not current
>> 4.13.0-rc3
> 
> Shouldn't make a difference. Can you please try the following:
> 
> Offline CPU1 before invoking suspend.
> 
> # echo 0 >/sys/devices/system/cpus/cpu1/offline

Tested with your latest patch (irq_trace_state):

echo 0 >/sys/devices/system/cpu/cpu1/online

./scripts/run-tests.sh -vt igt@..._exec_suspend@...ic-s3 -x devices

No change, no wakey at all.

Tomi
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