To gather some metrics, cumulative :iotop -P -aOn one server (Linux 2.6.18-348.6.1.el5, centos 5.9) iotop (iotop 0.4.3) shows :5 be/7 root          0.00 B      0.00 B -125056859448.21 %  0.20 % [ksoftirqd/1]6 rt/3 root          0.00 B      0.00 B -574104403438.82 %  0.00 % [migration/2]migration slowly falls and about 60 seconds later it will be out of the realtime output screen.ksoftirq remains listed with this weird negative 'SWAPIN %'.Question : is this value  a trivial bug of iotop or can it outline a real problem ?
iotop shows negative values for some metrics
linux;io;bugs;metric