RSS CPU affinity doesn't respect isolated cores

[cf-natali]

Hi!

I noticed that the default RSS CPU afffinity rss_cpus=cores - doesn't seem to ignore isolated cores, i.e. those marked with the isolcpus kernel command-line option. Which is a bit annoying since usually one doesn't want to handle IRQs/softirqs on such core - for example irqbalanced ignores those cores and the kernel also does its best to avoid touching those.

Is it something which would make sense to change/add an option for, or maybe add support to https://github.com/Xilinx-CNS/onload/blob/master/scripts/sfcirqaffinity ?

Cheers,