Paolo Bonzini wrote on 2014-12-19: > > > On 19/12/2014 02:46, Zhang, Yang Z wrote: >>> If the IRQ is posted, its affinity is controlled by guest (irq >>> <---> vCPU <----> pCPU), it has no effect when host changes its affinity. >> >> That's the problem: User is able to changes it in host but it never >> takes effect since it is actually controlled by guest. I guess it >> will break the IRQ balance too. > > I don't think that's a problem. > > Controlling the affinity in the host affects which CPU in the host > takes care of signaling the guest. > > If this signaling is done directly by the chipset, there is no need to > do anything in the host and thus the host affinity can be bypassed. I don't quite understand it. If user set an interrupt's affinity to a CPU, but he still see the interrupt delivers to other CPUs in host. Do you think it is a right behavior? > > Paolo Best regards, Yang -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
