YES the boot option alone has no effect, you must also compile the kernel with CONFIG_RCU_NOCB_CPU. You should be fine now (I have this confirmed on several different configs). Here's a tutorial: http://blog.programster.org/ubuntu-16-04-compile-custom-kernel-for-ryzen
YES the boot option alone has no effect, you must also compile the kernel with CONFIG_ RCU_NOCB_ CPU. You should be fine now (I have this confirmed on several different configs). Here's a tutorial: http:// blog.programste r.org/ubuntu- 16-04-compile- custom- kernel- for-ryzen