Stephen Hemminger wrote:

Still interested in this. I got part way through integrating it but had
concerns about the API from the application to netem for getting the data.
It seemed like there ought to be a better way to do it that could handle large
data sets better, but never really got a good solution worked out (that is why
I never said anything).

Would spreading them over multiple netlink messages work? A different,
slightly ugly possibility would be to simply use copy_from_user, netlink
is synchronous now (still better than using configfs IMO).