Multiple "kworker" are hogging CPU. Possible virus?

I read that it is used on the computer. It has been coming up on my Samsung Galaxy S2. It is on at least 3 times at once and up to 7 or 8 at once. They are called kworker/0:1 through kworker/0:4 and/or kworker/u:1 through kworker/u:4 Occasionally, it comes up as using about 80 % of the CPU. My phone also regularly crashes as of recently. Could kworker be the problem? The virus I have also is kind of trojan-based and has popups when I restart my phone sometimes. Also, when my phone is asleep, and I turn it back on, it says kworker is using 100% of my CPU data.