Re: Need help in interpreting ip status output

["André Hartmann" <aha_1980@gmx.de>]

Thanks Oliver.

Reading the log it indeed seems a good idea to try a newer Kernel.

Marc, do you have any further comments?

Thanks and best regards,
André

On 21.03.20 18:04, Oliver Hartkopp wrote:
> + Marc
>
> Hi André,
>
> On 21/03/2020 16.19, André Hartmann wrote:
>
>>> On 12/03/2020 18.43, André Hartmann wrote:
>>>
>>>>> can someone help me interpreting the following ip output:
>
>>> The reason for the overrun error is a notification from the CAN
>>> controller itself. It tells us that the received CAN frame has not been
>>> read from the controller until the next CAN frame arrived.
>>
>> Ok, that's what I thought too, thanks for the confirmation.
>>
>>> The dropped counter usually indicates that the CAN driver did not get a
>>> skbuff data structure (e.g. out of memory condition).
>>>
>>> This is NOT good. What CAN hardware/setup are you using?
>>
>> Actually it's not my system. The report is from a customer doing a full
>> load test on an iMX8: https://bugreports.qt.io/browse/QTBUG-82610
>
> Thanks for the link!
>
>> I guess the customer should try a more recent Kernel than 4.14 first?
>
> The FlexCAN driver (which is used in the IMX8 AFAIK) had a remarkable
> number of changes last year:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/net/can/flexcan.c
>
>
> So I would definitely suggest an update.
> I added Marc to this thread as he was very active on the FlexCAN
> improvements.
>
> Best,
> Oliver