Comment # 7 on bug 939299 from Diego Ercolani

I found somwthing that could be hust my case... the virtualbox module:
This process: iprt-VBoxTscThr
is in "D" state so as stated here:
http://permalink.gmane.org/gmane.comp.emulators.virtualbox.devel/7777

for every process in "D" state, linux load is raised by one.

Do you think it could be the problem? How to address it?

I see it using in another system this simple script:

 while true; do date; ps auxf | awk '{if($8=="D") print $0;}'; sleep 1; done

that output:
[...]
root     25582  0.0  0.0      0     0 ?        D    11:42   0:00  \_
[iprt-VBoxTscThr]
Fri Jul 31 11:42:10 CEST 2015
root     25582  0.0  0.0      0     0 ?        D    11:42   0:00  \_
[iprt-VBoxTscThr]
Fri Jul 31 11:42:11 CEST 2015
root       525  0.0  0.0      0     0 ?        D    00:00   0:01  \_
[md0_raid1]
root     25582  0.0  0.0      0     0 ?        D    11:42   0:00  \_
[iprt-VBoxTscThr]
Fri Jul 31 11:42:12 CEST 2015
root     25582  0.0  0.0      0     0 ?        D    11:42   0:00  \_
[iprt-VBoxTscThr]
Fri Jul 31 11:42:13 CEST 2015
root     25582  0.0  0.0      0     0 ?        D    11:42   0:00  \_
[iprt-VBoxTscThr]
Fri Jul 31 11:42:14 CEST 2015
root     25582  0.0  0.0      0     0 ?        D    11:42   0:00  \_
[iprt-VBoxTscThr]
Fri Jul 31 11:42:15 CEST 2015
root       508  0.0  0.0      0     0 ?        D    00:00   0:01  \_
[md127_raid1]
root       637  0.0  0.0      0     0 ?        D    00:00   0:01  \_
[jbd2/md127-8]
root     25582  0.0  0.0      0     0 ?        D    11:42   0:00  \_
[iprt-VBoxTscThr]
[...]

when "rcvboxdrv start" is started and I see that the system load raise with
this