Comment 76 for bug 379780

This bug is really bugging me, because despite being upto date with
everything released so far, it wont go away for me. :)

I have tried everything recommended on this thread, but the load does
not come down as much as if I were to shutdown udev completely. I
include a snapshot of all running process, with intermittent udev
restarts, to show that the problem does not go away on my machine.

As you observe in the attached file, the load drops significantly
as soon as I stop udev, but restarting it at various late intervals
does not change the load much.

Interestingly, powertop reports this suggestion for udevd.

The program 'udevd' is writing to file 'block:sr0' on /dev/devtmpfs.
This prevents the disk from going to powersave mode.