No "processor.max_cstate=1" is not necessary. I'd also suggest to double check that your motherboard bios is up to date. If it persists I'd try with a more recent kernel (I'm using 13.6) because IIRC the rcu options where a little bit different in earlier versions of 4.13.
No "processor. max_cstate= 1" is not necessary. I'd also suggest to double check that your motherboard bios is up to date. If it persists I'd try with a more recent kernel (I'm using 13.6) because IIRC the rcu options where a little bit different in earlier versions of 4.13.