Memory migration within a multi-host data processing environment

A data processing system that is a source host, the data processing system comprising:

• a system fabric;
• a system memory;
• a memory controller of the system memory, wherein the memory controller is communicatively coupled to the system fabric;
• a link controller communicatively coupled to the system fabric and configured to be communicatively coupled to a destination host via a communication link, wherein the destination host is non-coherent with respect to the source host;
• and
• a plurality of processing units communicatively coupled to the system fabric, wherein the plurality of processing units is configured to execute a logical partition having a dataset residing in the system memory and to migrate the logical partition to the destination host via the communication link by:
• migrating, via a communication link, the dataset of the logical partition executing on the source host from the system memory of the source host to a system memory of the destination host;
• after migrating at least a portion of the dataset, migrating, via the communication link, a state of the logical partition from the source host to the destination host, such that the logical partition thereafter executes on the destination host.

A program product, comprising:

• a computer-readable storage device;
• and
• program code, stored within the computer-readable storage device, which when executed by a data processing system serving as a source host causes the data processing system to perform:
• migrating, via a communication link, a dataset of a logical partition executing on a source host from the system memory of the source host to a system memory of a destination host that is non-coherent with respect to the source host;
• after migrating at least a portion of the dataset, migrating, via the communication link, a state of the logical partition from the source host to the destination host;
• and
• after migrating the state of the logical partition to the destination host, executing the logical partition on the destination host.