AW: AW: AW: [PATCH] kern_tc.c: Update pps_event() for uniprocessor configurations

Sebastian Huber sebastian.huber at embedded-brains.de
Fri Jun 10 06:10:09 UTC 2022


On 08.06.22 09:54, Gabriel.Moyano at dlr.de wrote:
>>>>>> I don't know why there is this "if" in the code. I will ask on a FreeBSD mailing list.
>>>>>>
>>>>> I think it is for the case that th_generation has changed in between
>>>>> saving the th and th_counter. If this happens pps->capgen is set to
>>>>> 0 and later pps_event() returns earlier. Since for uniprocessor
>>>>> th_generation equal to 0 is not used, I guess we can removed this if
>>>>> for those configurations
>>>> I asked on a FreeBSD mailing list:
>>>>
>>>> https://lists.freebsd.org/archives/freebsd-hackers/2022-June/001165.h
>>>> tml
>>>>
>>> Thanks for asking.
>>> I'll prepare and send a new patch removing the "if" for uniprocessor configurations just in case.
>> Please wait with a new patch for a response from FreeBSD.
>>
> What is your suggestion here? Should we check the generation only once? Or should we leave the code as is and just remove the "if" in pps_capture() for uniprocessor configurations since th_generation equal to zero is not used?

We should first leave the code as is. I don't know when I have time to 
send patches to FreeBSD.

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