Michael, >> Qemu needs a userspace write, is that a synchronous one or >>asynchronous one? >It's a synchronous non-blocking write. Sorry, why the Qemu live migration needs the device have a userspace write? how does the write operation work? And why a read operation is not cared here? Thanks Xiaohui -- 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
