[etherlab-users] e1000e driver freeze on kernel 4.9.80 rtai 5.1

Fri Sep 28 18:20:58 CEST 2018

Hi All, the patches fix the issue !!
Thank you very much.

Gianluca Medini

Il 27/09/2018 09:02, René Reimann ha scritto:
> Hello,
>
> we found out that the problem was in the e1000e driver, which caused 
> the System to freeze under RTAI.
> My colleague will later provide the code that solved the problem.
>
> Best Regards
> René Reimann
>
>
> On 26.09.2018 09:55, René Reimann wrote:
>> We tried to use only the e1000e driver for kernel 4.9.80 and no other 
>> patches. Additionaly we tried the e1000e driver
>> for kernel 3.18.22 with rtai 5.0. The problem remains the same in 
>> both cases.
>>
>> There is no output to the syslog when the system freezes.
>>
>> On 26.09.2018 02:46, Gavin Lambert wrote:
>>> Email Signature
>>>
>>> One of the first things you should try is to triage the patches by 
>>> rolling them back and then adding them one at a time and testing 
>>> until you find which patch appears to introduce the problem (or 
>>> whether it exists in the baseline without any patches). In most 
>>> cases you can then try skipping that patch and applying subsequent 
>>> ones until you find more problematic patches or you successfully 
>>> apply the remainder.
>>>
>>> Please share your findings so that we know where to look for the 
>>> culprit.
>>>
>>> (Also, if it manages to write some information to the syslog before 
>>> freezing then that could be helpful.)
>>>
>>> FWIW, I’ve been using PREEMPT_RT kernel 4.9.51 with e1000e for a 
>>> long while without issues.
>>>
>>> *From:*René Reimann
>>> *Sent:* Tuesday, 25 September 2018 19:28
>>> *To:* Gianluca Medini <gianluca.medini at gmail.com>; 
>>> etherlab-users at etherlab.org
>>> *Subject:* Re: [etherlab-users] e1000e driver freeze on kernel 
>>> 4.9.80 rtai 5.1
>>>
>>> Hello,
>>>
>>> we are experiencing the same problem with rtai 5.1 kernel 4.9.80 and 
>>> rtai 5.0 kernel.
>>> The system freezes randomly after several minutes with the e1000e 
>>> and the unofficial patches.
>>> Does somebody have an idea how to fix this?
>>>
>>> Best Regards
>>> René Reimann
>>>
>>> On 23.09.2018 22:29, Gianluca Medini wrote:
>>>
>>>     Hi all, I've tested the driver e1000e on rtai 5.1 kernel 4.9.80.
>>>
>>>     I'm using Gavin Lambert unofficial patches set that includes
>>>     patched drivers for 4.9.80.
>>>
>>>     The system  freezes randomly after some  minutes.
>>>
>>>     The Igb driver on same configuration works perfectly.
>>>
>>>     Someone have experienced the same issue?
>>>
>>>     GM
>>>
>>>
>>>
>>>
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>>
>>
>> -- 
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>> Logo <http://www.ialb.uni-bremen.de>
>> René Reimann
>> Wissenschaftlicher Mitarbeiter
>> IALB - Institut für elektrische Antriebe, Leistungselektronik und 
>> Bauelemente
>> Otto-Hahn-Allee 1
>> 28359 Bremen
>> Raum: S1390
>> Tel.: +49 421 218 62699
>> Fax: +49 421 218 98 62699
>> E-Mail: rreimann at ialb.uni-bremen.de <mailto:rreimann at ialb.uni-bremen.de>
>>
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> Email Signature
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> René Reimann
> Research Assistent
> IALB - Institut for electrical drives, power electronics and devices
> Otto-Hahn-Allee 1
> 28359 Bremen
> Raum: S1390
> Tel.: +49 421 218 62699
> Fax: +49 421 218 98 62699
> E-Mail: rreimann at ialb.uni-bremen.de <mailto:rreimann at ialb.uni-bremen.de>
>
> www.ialb.uni-bremen.de <http://www.ialb.uni-bremen.de>
>

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