Re: Having troubles binding an SR-IOV VF to uio_pci_generic on Amazon instance

[Avi Kivity <avi@scylladb.com>]

On 10/01/2015 01:44 PM, Michael S. Tsirkin wrote:
> On Thu, Oct 01, 2015 at 01:25:17PM +0300, Avi Kivity wrote:
>> Why use a VF on a non-virtualized system?
> 1. So a userspace bug does not destroy your hardware
>     (PFs generally assume trusted non-buggy drivers, VFs
>      generally don't).

People who use dpdk trust their drivers (those drivers are the reason 
for the system to exist in the first place).

> 2. So you can use a PF or another VF for regular networking.

This is valid, but usually those systems have a separate management 
network.  Unfortunately VFs limit the number of queues you can expose, 
making them less performant than PFs.

The "bifurcated drivers" were meant as a way of enabling this 
functionality without resorting to VFs, but it seems they are stalled.

> 3. So you can manage this system, to some level.
>

Again existing practice doesn't follow this.