Abstract: An I/O request processing method in a virtual machine, a device and a computer readable medium are provided. When a backend device of a Guest kernel begins to process an I/O request chain submitted by a frontend device of the Guest kernel into a shared I/O processing memory, the method obtains a starting position of the I/O request chain in the I/O processing memory; according to the starting position of the I/O request chain, sets an element corresponding to the starting position of the I/O request chain in an I/O state array as a value different from initial values of all positions; and upon finishing processing the I/O request chain, sets an element corresponding to the starting position of the I/O request chain in an I/O request state array as a value identical with initial values.

Abstract: Embodiments of the present disclosure disclose a communication method, apparatus and system for a virtual machine and a host machine. An embodiment of the communication method for a virtual machine and a host machine includes: polling a first command completion identifier queue set in a shared memory; comparing, in response to detecting an update of the first command completion identifier queue, the first command completion identifier queue with a second command completion identifier queue stored in the virtual machine to determine an identifier of a currently completed command; and updating the second command completion identifier queue based on the identifier of the currently completed command.

Abstract: A method and apparatus for processing data based on a physical host are provided. A specific embodiment of the method includes: acquiring a read and write request sent by a virtual machine; sending the read and write request to a host machine for processing; starting masking a preset signal interrupting a current process, in response to the host machine completing processing the read and write request; and terminating masking the preset signal in response to completing following: updating a first array recording information of the processed read and write request, updating a second array recording information of completing the acquired read and write request, and informing the virtual machine of a processing result of the read and write request. The embodiment provides a signal masking mechanism, and guarantees data consistency, thereby improving the operating efficiency of a physical host.

Abstract: Embodiments of the present disclosure disclose a communication method, apparatus and system for a virtual machine and a host machine. An embodiment of the communication method for a virtual machine and a host machine includes: polling a first command completion identifier queue set in a shared memory; comparing, in response to detecting an update of the first command completion identifier queue, the first command completion identifier queue with a second command completion identifier queue stored in the virtual machine to determine an identifier of a currently completed command; and updating the second command completion identifier queue based on the identifier of the currently completed command.

Abstract: A method and apparatus for processing data based on a physical host are provided. A specific embodiment of the method includes: acquiring a read and write request sent by a virtual machine; sending the read and write request to a host machine for processing; starting masking a preset signal interrupting a current process, in response to the host machine completing processing the read and write request; and terminating masking the preset signal in response to completing following: updating a first array recording information of the processed read and write request, updating a second array recording information of completing the acquired read and write request, and informing the virtual machine of a processing result of the read and write request. The embodiment provides a signal masking mechanism, and guarantees data consistency, thereby improving the operating efficiency of a physical host.

Abstract: The present disclosure provides an I/O request processing method in a virtual machine, a device and a computer readable medium. The method comprises: when a backend device of a Guest kernel begins to process an I/O request chain submitted by a frontend device of the Guest kernel into a shared I/O processing memory, obtaining a starting position of the I/O request chain in the I/O processing memory; according to the starting position of the I/O request chain, setting an element corresponding to the starting position of the I/O request chain in an I/O state array as a value different from initial values of all positions; upon finishing processing the I/O request chain, setting an element corresponding to the starting position of the I/O request chain in an I/O request state array as a value identical with initial values.