On Fri, 10 Sep 2021 10:09:09 -0500
Ian Pilcher [off-list ref] wrote:

On 9/9/21 9:17 PM, Marek Behún wrote:

quoted

So your code allows me to use a partition block device (like sda2) to
register with the blkdev LED trigger, but when I do this, the code will
disregard that I just want the LED to blink on activity on that one
partition. Instead you will blink for whole sda, since you are looking
at stats of only part0.

Am I right?  

You can't add partitions, only whole devices.

But I should be able to, since partition is a block device in /dev.
Any block device from /sys/class/block should be possible to add.

Marek