Re: Fwd: Re: [PATCH 2/2] ARM: mvebu: dts: Add dts file for DLink DNS-327L

[Andrew <andrew@ncrmnt.org>]

Gregory CLEMENT писал 20.04.2015 18:04:
> Hi Andrew,
> 
> On 13/04/2015 16:32, Andrew wrote:
>> Gregory CLEMENT писал 13.04.2015 17:16:
>>> Hi Andrew(s),
>>> 
>>> On 12/04/2015 21:47, Andrew Lunn wrote:
>>>> On Sun, Apr 12, 2015 at 06:41:31PM +0300, Andrew wrote:
>>>>> Andrew Lunn ?????????? 12.04.2015 17:58:
>>>>>>> Okay, got it.
>>>>>>> I'll file a bug about this issue to the the bugzilla. However
>>>>>>> something
>>>>>>> tells me it might not be cpuidle, but D-link. This one's sounds
>>>>>>> nasty
>>>>>>> and it has been around since 3.16.x. How could it go unnoticed?
>>>>>>> Unfortunately I have no other armada-370 hardware to test it.
>>>>>> 
>>>>>> Hi Andrew
>>>>>> 
>>>>>> A few of us here do have hardware to test with. Please give a
>>>>>> detailed
>>>>>> description of how you reproduce the issue, and your kernel
>>>>>> configuration, if different from mvebu_v7_defconfig, or
>>>>>> multi_v7_defconfig.
>>>>>> 
>>>>>> 	Thanks
>>>>>> 		Andrew
>>>>> 
>>>>> 
>>>>> arch/arm/configs/mvebu_v7_defconfig has
>>>>> CONFIG_ARM_MVEBU_V7_CPUIDLE=y,
>>>>> so it should be sufficient to reproduce the issue. I first
>>>>> encountered
>>>>> this issue using that very config and observed it on 2 DNS-327L 
>>>>> boxes
>>>>> I
>>>>> own.
>>>>> 
>>>>> All I have to do to trigger the bug - enable cpuidle driver and let
>>>>> the box
>>>>> sit for some 4-12 hours, till it hard-freezes. If wdt is enabled -
>>>>> wdt reboot
>>>>> will happen.
>>>> 
>>>> That simple! Well i've got a 370RD which has been sat mostly idle 
>>>> for
>>>> weeks, using the mvebu_v7_defconfig, with a few addition things 
>>>> turned
>>>> on for testing the Ethernet switch on the board. I've not had that
>>>> lockup.
>>>> 
>>>> One thing you can try to narrow it down is the disable the second 
>>>> idle
>>>> mode. Take a look at armada370_idle_driver. Keep the
>>>> ARM_CPUIDLE_WFI_STATE but disable the "Deep Idle" state.
>>> 
>>> Actually you don't have to modify the kernel you can setup the CPU 
>>> idle
>>> level
>>> you want at runtime:
>>> 
>>> echo 1 > /sys/devices/system/cpu/cpu0/cpuidle/state1/disable
>>> 
>>> will disable the state1. By doing this on Armada 370 then you
>>> will only use the WFI state.
>>> 
>>> Do you still have this issue on v4.0-rc7?
>> 
>> Yep, I can confirm having this issue on 4.0-rc7. I will only be able 
>> to
>> test if
>> disabling state1 fixes it the next weekend.
> 
> Did you manage to do some test this week-end?
> 
> Thanks,
> 
> Gregory
> 
> 
>> 
>>> 
>>> Thanks,
>>> 
>>> Gregory
>>> 
>>> 
>>> 
>>>> 
>>>>       Andrew
>>>> 
>> 

Sorry, I've been away for the weekend but managed to take the
hardware home on my way back. I'll rig it for a long test today
in the evening. Expect some test results somewhere around Wednesday.
(Guess it doesn't count unless it's stable for 24+ hours).

-- 
Regards,
Andrew