redhat – ps + kworker with state D

we have redhat machines in cluster

the redhat version is – 7.2

when we act

ps ax

In the machine we saw many kworker with D status

example

17165? D 0:00  [kworker/u66:1]
2151? D 0:58  [kworker/u33:0]
3866? D 0:26  [kworker/u65:0]
14967? D 0:00  [kworker/2:1]
2014? D 0:10  [kworker/u65:1]
19021? D 0:05  [kworker/u65:0]
26880? D 9:43  [kworker/16:2]
7972? D 9:04  [kworker/31:1]
12295? D 2:01  [kworker/3:1]
13859? D 0:11  [kworker/u65:3]

I must say that we also face a high average load on the CPU

Based on that information, what should the conclusion be?

for example, what do we need to verify? Or make some melody for the operating system?