On Fri, Jul 29, 2011 at 09:54, Konrad Rzeszutek Wilk
[off-list ref] wrote:

quoted

quoted

quoted

quoted

On Wed, 2011-07-27 at 15:17 -0700, Greg Rose wrote:

quoted

Device drivers that create and destroy SR-IOV virtual functions via
calls to pci_enable_sriov() and pci_disable_sriov can cause

catastrophic

quoted

quoted

quoted

failures if they attempt to destroy VFs while they are assigned to
guest virtual machines.  By adding a flag for use by the KVM module
to indicate that a device is assigned a device driver can check that
flag and avoid destroying VFs while they are assigned and avoid

system

quoted

quoted

quoted

failures.

OK, but I hope Xen can still use the dev_flag assignment bit.

Yeah, I think the attached patch would do it, but I need to double check it.
Do you have a git tree with this patchset?

Not yet, Greg was send these patches out as a RFC to make sure this
was the correct direction to go.

Um, so you are fixing up ixgbe only - what about the cxgb4 and be driver?
Shouldn't they also get some of this treatment?

Yes, Greg made changes to ixgbe to give an idea of what changes would
need to be made with the suggested changes.  From the feedback Greg
received, there is definite changes needed.  When Greg gets finished
with the necessary changes to the kernel/ethtool, we will have a
better idea of what changes are needed for the drivers.

-- 
Cheers,
Jeff