Fedora 35, not fully up-to-date I run a SiliconDust tuner that converts OTA TV to mp2, which I'm then able to play back using mplayer. An hard-wired ethernet connection is used between the tuner and the main CPU. I notice that there are leftover kworker processes. They are mostly idle and only a few have non-zero time, and then at most only a couple of seconds. For example,   87547 ?        I      0:00 [kworker/u16:1-phy0]   87554 ?        I      0:00 [kworker/7:2-events]   87555 ?        I      0:00 [kworker/5:2-events]   87556 ?        I      0:00 [kworker/u16:2-btrfs-endio-write]   87557 ?        I      0:00 [kworker/u16:3-btrfs-delalloc]   87558 ?        I      0:00 [kworker/u16:5-btrfs-endio-write]   87559 ?        I      0:00 [kworker/u16:7-events_unbound]   87560 ?        I      0:00 [kworker/u16:9-btrfs-freespace-write]   87561 ?        I      0:00 [kworker/u16:10]   87626 ?        I<     0:00 [kworker/u17:1] The leftover processes seem to vanish when the system is suspended. Should I be concerned? In particular,  I was not aware that I had installed the btrfs filesystem.