I browsed both the linuxptp devel and user mail archives, but couldn't see any 
email thread about RHEL back porting of linuxptp and ethtool. Perhaps I didn't 
look at the right places or missed it. Does someone know where the relevant 
information is located? I would much appreciate to learn about the specific 
issues of back porting in the past and how they were solved or still remain 
unsolved? Does 'buggy' refer to the PTP protocol itself or accuracy achievement 
or both?

For deployment with software timestamping, there is no need to back port the 
PHC and to run the phc2sys program. Is that correct? And changes to PTP 
protocol stack in the user space are necessary if an implementation does not 
make use of SO_TIMESTAMPING socket, but have instead some non-generic TX/RX 
FPGA-based hardware timestamping.

Thanks!
Daniel


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