# US 10,481,942 B2 · Virtual machine suspension > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,481,942 B2 - Document ID: US10481942B2 - Status: Granted - Kind: B2 - Application number: 15/979,083 - Filed: 2018-05-14 - Published: 2018-09-27 - Granted: 2019-11-19 - Earliest claimed: 2013-02-26 - Assignees: Red Hat Israel, Ltd. - Applicants: Red Hat Israel, Ltd. - Inventors: Yaniv Kaul - Web page: https://patentgrep.com/patent/US10481942B2 ## CPC - G06F 9/45558: {Hypervisor-specific management and integration aspects} - G06F 2009/45575: {Starting, stopping, suspending or resuming virtual machine instances} - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) ## Abstract A method and system for suspending operation of a virtual machine executed by a processing device of a host computing system. The method and system include storing state information of the virtual machine to a memory of the guest operating system. A notification is sent to an application of the virtual machine to enable the application to flush data prior to suspension of the operation of the virtual machine. Upon receipt of a confirmation that the state information is stored in the memory of the guest operating system, the state information is migrated to storage of the host computing system. ## Claims ### Claim 1 A method comprising: receiving a request to suspend an operation of a guest operating system executing on a virtual machine executed by a processing device of a host computing system comprising host storage; storing state information of the virtual machine to a memory of the guest operating system; placing the virtual machine in a sleep mode to produce a notification to an application executing on the virtual machine, wherein the notification enables the application to flush data to a disk prior to suspension of the operation of the virtual machine; receiving, from the guest operating system, a confirmation that the state information is stored in the memory of the guest operating system; and in response to receiving the confirmation, migrating the state information from the memory of the guest operating system to the host storage. ### Claim 2 (depends on 1) The method of claim 1, further comprising migrating the state information from the host storage to the memory of the guest operating system. ### Claim 3 (depends on 2) The method of claim 2, further comprising issuing a resume instruction to the guest operating system to cause a resuming of the operation of the virtual machine. ### Claim 4 (depends on 3) The method of claim 3, further comprising sending a further notification to the application indicating the resuming of the operation of the virtual machine. ### Claim 5 (depends on 1) The method of claim 1, further comprising storing information associated with a virtual machine device to the memory of the guest operating system. ### Claim 6 (depends on 1) The method of claim 1, further comprising sending a command to the virtual machine to cause the storing of the state information of the virtual machine to the memory of the guest operating system. ### Claim 7 (depends on 1) The method of claim 1, wherein the notification further enables the application to perform at least one of: conserving power, disconnecting a tunnel, disconnecting an open connection, securing the application, saving a draft of an open document, or completing a database transaction. ### Claim 8 A system comprising: a memory; and a processing device, operatively coupled to the memory, to: receive a request to suspend an operation of a guest operating system executing on a virtual machine executed by a processing device of a host computing system comprising host storage; store state information of the virtual machine to a memory of the guest operating system; place the virtual machine in a sleep mode to produce send a notification to an application executing on the virtual machine, wherein the notification enables the application to flush data to a disk prior to suspension of the operation of the virtual machine; receive, from the guest operating system, a confirmation that the state information is stored in the memory of the guest operating system; and in response to receipt of the confirmation, migrate the state information from the memory of the guest operating system to the host storage. ### Claim 9 (depends on 8) The system of claim 8, the processing device to migrate the virtual machine information from the host storage to the memory of the guest operating system. ### Claim 10 (depends on 9) The system of claim 9, the processing device to issue a resume instruction to the guest operating system to cause a resuming of the operation of the virtual machine. ### Claim 11 (depends on 8) The system of claim 8, the processing device to send a further notification to the application indicating the resuming of the operation of the virtual machine. ### Claim 12 (depends on 8) The system of claim 8, the processing device to store information associated with a virtual machine device to the memory of the guest operating system. ### Claim 13 (depends on 8) The system of claim 8, the processing device to send a command to the virtual machine to cause the storing of the state information of the virtual machine to the memory. ### Claim 14 (depends on 8) The system of claim 8, wherein the notification further enables the application to perform at least one of: conserving power, disconnecting a tunnel, disconnecting an open connection, securing the application, saving a draft of an open document, or completing a database transaction. ### Claim 15 A non-transitory computer readable storage medium including instructions that, when executed by a processing device, cause the processing device to: receive a request to suspend an operation of a guest operating system executing on a virtual machine executed by a processing device of a host computing system comprising host storage; store state information of the virtual machine to a memory of the guest operating system; place the virtual machine in a sleep mode to produce a notification to an application executing on the virtual machine, wherein the notification enables the application to flush data prior to suspension of the operation of the virtual machine; send a notification to an application of the virtual machine to enable the application to flush data to a disk prior to suspension of the operation of the virtual machine; receive, from the guest operating system, a confirmation that the state information is stored in the memory of the guest operating system; and in response to receipt of the confirmation, migrate the state information from the memory of the guest operating system to the host storage. ### Claim 16 (depends on 15) The non-transitory computer-readable storage medium of claim 15, the processing device to migrate the virtual machine information from the host storage to the memory of the guest operating system. ### Claim 17 (depends on 16) The non-transitory computer-readable storage medium of claim 16, the processing device to issue a resume instruction to the guest operating system to cause a resuming of the operation of the virtual machine. ### Claim 18 (depends on 15) The non-transitory computer-readable storage medium of claim 15, the processing device to send a further notification to the application indicating the resuming of the operation of the virtual machine. ### Claim 19 (depends on 15) The non-transitory computer-readable storage medium of claim 15, the processing device to store information associated with a virtual machine device to the memory of the guest operating system. ### Claim 20 (depends on 15) The non-transitory computer-readable storage medium of claim 15, the processing device to send a command to the virtual machine to cause the storing of the state information of the virtual machine to the memory.