[etherlab-users] Machine freeze/reset on module load

[Esben Haabendal]

Hi

With ethercat debug, I see something like this:

# ethercat reg_read -p 0 0x1000 --type uint8
[   29.104116] EtherCAT 0: Master debug level set to 1.
[   29.147356] EtherCAT DEBUG 0-0: Processing register request, offset 0x1000, length 1...
[   29.159696] EtherCAT DEBUG 0-0: Register request successful.
0x00 0

Sometimes the hang is before the register read out is printed, sometime
just after, and some times I get the prompt, and the hang is shortly
after.  But not enough so that I have managed to get further information
(yet).

A (perhaps) interesting observation, when doing this as root, the
register read out is (almost) always 0x00 0, whereas when running as
non-priveleged user, the readout is random garbage before the hang.  As
non-priveleged user, it is sometimes possible to read the register a
couple of times before the hang occurs.

I therefore strongly suspect that the hang occurs in the EtherCAT-IDLE
thread, or some other kernel thread.

/Esben

Andreas Stewering-Bone <ab at igh-essen.com> writes:

> Hello,
>
> ethercat debug 1
>
> Greatings
>
> Andreas
>
>
> Esben Haabendal schrieb:
>> Hi
>>
>> Andreas Stewering-Bone <ab at igh-essen.com> writes:
>>
>>   
>>> Under preempt kernel the kernel itself has realtime capabilities, so
>>> you can use the generic driver.
>>>     
>>
>> I know, I am "using" it.  But after starting to use it beyound basic
>> testing, I now look on a bug report with the mentioned bug report.
>>
>>   
>>> Please show the debugging output of the ethercat command if you read
>>> the register.
>>>     
>>
>> How do I enable debug output of the ethercat command?
>>
>> /Esben
>>