Question about ixgbe and ixgbevf

[Kevin Wilson]

Hi,
I have an x86_64 machine (F21) on which ixgbevf is not loaded.
I notices that when running
modprobe ixgbevf max_vfs = 10 (or any other number), this triggers
loading of ixgbevf driver.
I will appreciate if someone can exaplain the implementation details
of how does this happen.
I could not find what in the ixgbe driver code triggers this action

Regards,
Kevni