Controlling Memory Redundancy In A System

A method comprising:

• migrating information stored in a first memory node of a system to a second memory node of the system;
• prior to completion of migrating the information, updating a redundant memory aperture storage of a first memory controller associated with the first memory node to indicate an amount of the information migrated from the first memory node to the second memory node;
• and
• executing an operating system (OS)-controlled thread on a processor of the system prior to completion of the memory migration and determining whether an error incurred during a memory access request of the OS-controlled thread to the first memory node occurred in a region of the first memory node that has been migrated to the second memory node and if so retrying the memory access request to the second memory node, otherwise signaling an uncorrectable memory error.

At least one computer readable storage medium comprising instructions that when executed enable the system to:

• migrate information stored in a first memory node of a system to a second memory node of the system;
• prior to completion of migration of the information, update a redundant memory aperture storage of a first memory controller associated with the first memory node to indicate an amount of the information migrated from the first memory node to the second memory node;
• and
• execute an operating system (OS)-controlled thread on a processor of the system and determine whether an error incurred during a memory access request of the OS-controlled thread to the first memory node occurred in a region of the first memory node that has been migrated to the second memory node and if so retry the memory access request to the second memory node, otherwise signal an uncorrectable memory error.