Recently I noticed that kernel_task is constantly using CPU. I've looked around and seen lots of threads where people are complaining that kernel_task is running wild and using 100% CPU and over a gig of RAM, but mine is steadily using about 350 MB of RAM which seems normal, but is constantly using at least 10% CPU, sometimes as much as 20 when my system is just idling. Is this normal? I'm on Mavericks and I'm really starting to distrust it, so maybe I'm just being paranoid. Thanks for any insight.