Flush-9:3 used too much CPU and MEM

Does anyone had a problem that Flush-XX:YY used too much CPU and MEM?

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2543 root 20 0 0 0 0 D 11.3 0.0 14:33.12 flush-9:3

It’s used so much, that I can’t copy files from my computer to MBLD.

P.S. I will check again, after debrick him… :frowning: