[PATCH] nvme: add 'iopolicy' module parameter

[Sagi Grimberg]

> While the 'iopolicy' sysfs attribute can be set at runtime, most
> storage arrays prefer to use the 'round-robin' iopolicy per default.
> We can use udev rules to set this, but is getting rather unwieldy
> for rebranded arrays as we would have to update the udev rules
> anytime a new array shows up, leading to the same mess we currently
> have in multipathd for configuring the RDAC arrays.
> 
> Hence this patch adds a module parameter 'iopolicy' to allow the
> admin to switch the default, and to do away with the need for a
> udev rule here.

This seems fine to me:
Reviewed-by: Sagi Grimberg <sagi at grimberg.me>

What do other think?