From: Krzysztof Kozlowski <k.kozlowski@samsung.com>
To: Tobias Jakobi <tjakobi@math.uni-bielefeld.de>,
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 15:20:29 +0200 [thread overview]
Message-ID: <5788E31D.6010606@samsung.com> (raw)
In-Reply-To: <5788E1EB.4030003@math.uni-bielefeld.de>
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?
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 13:20 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 [this message]
2016-07-15 13:23 ` Tobias Jakobi
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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