Re: [PATCH mlx5-next v6 1/4] PCI: Add sysfs callback to allow MSI-X table size change of SR-IOV VFs

Bjorn Helgaas
2021-02-20T19:07:00Z

On Fri, Feb 19, 2021 at 09:20:18AM +0100, Greg Kroah-Hartman wrote:

> Ok, can you step back and try to explain what problem you are trying to
> solve first, before getting bogged down in odd details? I find it
> highly unlikely that this is something "unique", but I could be wrong as
> I do not understand what you are wanting to do here at all.

We want to add two new sysfs files:

sriov_vf_total_msix, for PF devices
sriov_vf_msix_count, for VF devices associated with the PF

AFAICT it is *acceptable* if they are both present always. But it
would be *ideal* if they were only present when a driver that
implements the ->sriov_get_vf_total_msix() callback is bound to the
PF.