Server increasing load due increasing processes in D state

[Eduardo Damato]

Hi Alessandro,

Thanks for the information.

The sysrq-t that I requested is *only* useful during the problem. Please
do that when you encounter the problem again.

It may be that you are overcommitting cpus on your system by having many
virtual machines running on the nova controller node. This is a
completely wild guess, but I would recommend you to look at how many
cpus you have and how many virtual machines and if you have any
processes in real time or sched FIFO.

Cheers,
Eduardo.