On Sun, 2 Jul 2017 16:38:19 -0500 Bjorn Helgaas <helgaas@xxxxxxxxxx> wrote: > On Wed, Jun 28, 2017 at 04:22:04PM -0700, Stephen Hemminger wrote: > > When Intel 10G (ixgbevf) is passed to a Hyper-V guest with SR-IOV, > > the driver requests affinity with all possible CPU's (0-239) even > > those CPU's are not online (and will never be). Because of this the device > > is unable to correctly get MSI interrupt's setup. > > > > This was caused by the change in 4.12 that converted this affinity > > into all possible CPU's (0-31) but then host reports > > an error since this is larger than the number of online cpu's. > > > > Previously, this worked (up to 4.12-rc1) because only online cpu's > > would be put in mask passed to the host. > > > > This patch applies only to 4.12. > > The driver in linux-next needs a a different fix because of the changes > > to PCI host protocol version. > > If Linus decides to postpone v4.12 a week, I can ask him to pull this. But > I suspect he will release v4.12 today. In that case, I don't know what to > do with this other than maybe send it to Greg for a -stable release. Looks like this will have to be queued for 4.12 stable.
