From: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>
To: Krzysztof Kozlowski <k.kozlowski@samsung.com>,
nicolas@ndufresne.ca,
"linux-samsung-soc@vger.kernel.org"
<linux-samsung-soc@vger.kernel.org>
Cc: Javier Martinez Canillas <javier@osg.samsung.com>
Subject: Re: Odroid U2 Kernel 4.7rc7+ Hang on reboot
Date: Fri, 15 Jul 2016 15:23:23 +0200 [thread overview]
Message-ID: <5788E3CB.5080103@math.uni-bielefeld.de> (raw)
In-Reply-To: <5788E31D.6010606@samsung.com>
Krzysztof Kozlowski wrote:
> On 07/15/2016 03:15 PM, Tobias Jakobi wrote:
>> Hey,
>>
>> Krzysztof Kozlowski wrote:
>>> On 07/15/2016 09:55 AM, Krzysztof Kozlowski wrote:
>>>>>> Nicolas Dufresne wrote:
>>>>>>> Le jeudi 14 juillet 2016 à 15:37 -0400, Nicolas Dufresne a écrit :
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> I'm using the Odroid U2 to test some features implemented in
>>>>>>>> GStreamer.
>>>>>>>> The parts I need mostly works in mainline kernel, my main
>>>>>>>> annoyance
>>>>>>>> ist
>>>>>>>> that reboot hangs.
>>>>>>>>
>>>>>>>> Is this issue known ? I'm booting from SD card is that matters.
>>>>>>>> Any
>>>>>>>> advise would be appreciated. I'm not list member, so please keep
>>>>>>>> me
>>>>>>>> in
>>>>>>>> CC. I'm sharing my .config, in case that is my fault.
>>>>
>>>> First of all - use just command "reboot" to restart. It should work. If
>>>> it doesn't, please let us now.
>>>>
>>>> I was able to reproduce your issue - OOPS in emergency restart - also in
>>>> my configuration (U3 + eMMC + network boot).
>>>>
>>>> It is weird... I'll take a look at it.
>>>
>>> Actually I did not encounter OOPS of yours. I was able to reproduce a
>>> failure to reboot on U3. XU3 reboots fine. It might be related to pwrseq...
>> I'm not sure how much that helps, but I can't reproduce any of this on
>> my X2 (which is quite closely related to the U2/U3).
>
> You mean sysrq reboot works fine?
No, I haven't checked that yet. But normal reboot and poweroff via init
works properly.
- Tobias
> Best regards,
> Krzysztof
>
>> I'm only encountering non-working reboot when applying Marek's latest
>> IOMMU runpm patchset.
>>
>>
>>> The failure seems to be present for long time, at least since v4.2. I am
>>> in progress of testing more releases.
>> At least not for the X2, and I'm booting from a sdcard like Nicolas.
>> IIRC then pwrseq only plays a role for booting from eMMC.
>>
>>
>>> ext4 backtrace present in your OOPs might be related to improper reboot.
>>> Even for emergency reboot you should first sync, then remount ro and
>>> finally reboot (so sysrq: sub).
>> I currently don't have access to my UART adapater, but I'll try to
>> reproduce the Oops by issuing a reboot SysRq directly.
>>
>>
>> With best wishes,
>> Tobias
>>
>>
>>> Best Regards,
>>> Krzysztof
>>>
>>
>>
>>
>
next prev parent reply other threads:[~2016-07-15 13:23 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <1468525055.4843.4.camel@ndufresne.ca>
2016-07-14 19:45 ` Odroid U2 Kernel 4.7rc7+ Hang on reboot Nicolas Dufresne
2016-07-14 20:01 ` Tobias Jakobi
2016-07-14 20:33 ` Nicolas Dufresne
2016-07-15 7:55 ` Krzysztof Kozlowski
2016-07-15 11:35 ` Krzysztof Kozlowski
2016-07-15 13:15 ` Tobias Jakobi
2016-07-15 13:20 ` Krzysztof Kozlowski
2016-07-15 13:23 ` Tobias Jakobi [this message]
2016-07-15 13:25 ` Krzysztof Kozlowski
2016-07-15 14:33 ` Tobias Jakobi
2016-07-15 15:56 ` Nicolas Dufresne
2016-07-19 11:29 ` Krzysztof Kozlowski
2016-07-20 12:29 ` Krzysztof Kozlowski
2016-07-20 12:53 ` Nicolas Dufresne
2016-07-20 23:56 ` Marian Mihailescu
2016-07-15 13:24 ` Krzysztof Kozlowski
2016-07-15 13:50 ` Nicolas Dufresne
2016-07-14 20:22 ` Nicolas Dufresne
2016-07-16 13:53 ` Marian Mihailescu
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