> > So e.g. we could set an affinity hint to a group of CPUs that > > > might transmit to this queue. > > > > We also want to set the xps mask for all cpus in the group to this queue. > > > > Is there a benefit over explicitly choosing one cpu from the set, btw? > > If only one CPU actually transmits on this queue then probably yes. > And virtio doesn't know whether that's the case.
Oh, yes, good example. To plumb that through, vp_set_vq_affinity would have to take a cpu mask like irq_set_affinity_hint, instead of a single value. Though I don't suggest doing that as part of the core virtnet_set_affinity changes.
