On Wed, Feb 15, 2017 at 11:17 AM, Michael S. Tsirkin <mst@xxxxxxxxxx> wrote: > Right. But userspace knows it's random at least. If kernel supplies > affinity e.g. the way your patch does, userspace ATM accepts this as a > gospel. The existing code supplies the same affinity gospels in the #vcpu == #queue case today. And the patch (unless it has a bug in it) should not affect the #vcpu == #queue case's behavior. I don't quite understand what property we'd be changing with the patch. Here's the same dump of smp_affinity_list, on a 16 VCPU machine with unmodified kernel: 0 0 1 1 2 2 [..] 15 15 And xps_cpus 00000001 00000002 [...] 00008000 This patch causes #vcpu != #queue case to follow the same pattern. Thanks again! Ben
