Patent Number: 8,881,150

Title: Virtual machine, virtual machine system and method for controlling virtual machine

Abstract: In an exemplary computing machine of the invention, a shared IO device used by a first virtual machine and the second virtual machine includes a physical IO device and a virtual IO device controlled by the physical IO device. In the case of detecting that the first driver has transmitted a stop signal for stopping the physical IO device, a hypervisor keeps the stop signal from being transmitted to the shared IO device, determines whether or not a processing request transmitted by the second driver to the virtual IO device has been completed, and stops the physical IO device with the completion of the processing request as a trigger.

Inventors: Sawa; Yuta (Tokyo, JP), Hattori; Naoya (Yokohama, JP), Tsushima; Yuji (Hachioji, JP)

Assignee: Hitachi, Ltd.

International Classification: G06F 9/455 (20060101)

Expiration Date: 2019-11-04 0:00:00