Now disk statistics add another option: performance metrics for disks with major X, where X is the major number as shown in /proc/diskstats. By default it is yes for all disks. Turning this to no, will disable performance metrics for these disks.
performance metrics for disks with major X
disk statistics config options cleanup (leftovers from old logic).
disk performance metrics can now be disabled per device major; disk s…
…tatistics config options cleanup