International Business Machines Corporation

Ray Mansell

Lisa Cranton Heller

Damian Leo Osisek

Hubertus Franke

Martin Schwidefsky

William Alan Holder

Randall W Philley

Ingo Adlung

Jong Hyuk Choi

Gustav E Sittmann, Iii

Eli M Dow

Jessie Yu

Frank R LeFevre, Jr

Gustav E Sittman, Iii

Randall Philley

Jong Hyuk Ibm Uk Limited Choi

Gustav Sittmann 111

Processing within a computing environment that supports pageable guests is facilitated. Processing is facilitated in many ways, including, but not limited to, associating guest and host state information with guest blocks of storage; maintaining the state information in control blocks in host memory; enabling the changing of states; and using the state information in management decisions. In one particular example, the guest state includes an indication of usefulness and importance of memory contents to the guest, and the host state reflects the ease of access to memory contents. The host and guest state information is used in managing memory of the host and/or guests.

Facilitating processing within computing environments supporting pageable guests

Methods, systems and computer program products for utilizing system configuration information to determine a data migration order. The method includes computer instructions for establishing communication from a source virtual machine to a target virtual machine, the source virtual machine including a memory. The configuration information associated with the source virtual machine is determined and utilized to determine an order of migration for pages in the memory. The pages in the memory are transmitted to the target virtual machine in the order of migration.

Utilizing system configuration information to determine a data migration order

Virtual machine guest migration overcommit is supported by providing a virtual machine with an unschedulable resource that is not available for system scheduling. The unschedulable resource may, but need not, be provided in the form of a memory buffer, or one or more network resources, or one or more resources that are accessible from a network. The unschedulable resource is utilized in one or more domains to temporarily conceal one or more user environments that do not fit into a set of currently available resources, such that the one or more temporarily concealed user environments are not terminated or paged out.

Method, computer program product, and hardware product for supporting virtual machine guest migration overcommit

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Ray Mansell