>A few additional questions:) > >1. If IO to a block device goes through QEMU and not vhost, are there >data copies between kernel and user mode if I do IO to a block device >or is it zero copy? Kind of related to Question (2) also. > I'm not sure, it perhaps depend on which IO mode you chose, qemu pthreads IO, or linux AIO? Somebody else do a favour, please.
>2. A related question to (1), is the QEMU process separate from the VM >process or do they all run on the same process as different threads? I >did read about IO threads and it seemed like they are all part of the >same process, wanted to confirm. > Yes, vcpu threads and qemu backend IO threads belong to the same process(qemu). >Thank you:) -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
