When creating a guest with 2 virtio-net interfaces, i am running into a issue causing the 2nd i/f falling back to userpace virtio even when vhost is enabled. After some debugging, it turned out that KVM_IOEVENTFD ioctl() call in qemu is failing with ENOSPC. This is because of the NR_IOBUS_DEVS(6) limit in kvm_io_bus_register_dev() routine in the host kernel. I think we need to increase this limit if we want to support multiple network interfaces using vhost-net. Is there an alternate solution? Thanks Sridhar -- 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
