[atomic77]

Where this could be interesting is in cloud/VM environments where the block device may actually be mounted over the network.

The performance improvement for fast devices cited in a link on the article [1] are pretty dramatic, but I wonder about how slow the device needs to be before polling becomes a problem. That same link mentions that slow devices benefit, but, speculate that it may be due to the CPU not being able to go into a deeper sleep state.

[1] http://lwn.net/Articles/663543/

[ArkyBeagle]

I would think that you'd have the network latency profile and the disk latency profile and that they would add in amusing ( read : non-intuitive ) ways. I read "mounted" to indicate a drive, not always a good assumption.