why the processes kworker always hold more than 90% cpu

[Richard Liu]

Hi All,
  I installed ubuntu server 12.04 32bit version in my eeebox, and I
recently found that processes kworker (like kworker/0:3, kworker/0:0)
always hold more than 90% cpu. Any other what is the reason for this,
and who can help to fix this issue? Thanks
-- 
Thanks,
Richard