isolcpus sadly isn't complete - some kernel tasks still get scheduled. There was some stuff to improve this - https://lwn.net/Articles/816298/ https://lwn.net/

isolcpus sadly isn't complete - some kernel tasks still get scheduled. There was some stuff to improve this - https://lwn.net/Articles/816298/ https://lwn.net/Articles/816298/ - but it wasn't merged into mainline.