Asynchronously clearing page frames

A system for managing frames, the system comprising:

• a memory having computer-readable instructions;
• and
• one or more processors for executing the computer-readable instructions, the computer-readable instructions comprising:
• producing two or more clean frames by clearing a first batch of two or more used frames for use in backing virtual memory pages;
• adding the two or more clean frames to a clean frame queue, the clean frame queue comprising a plurality of clean frames that have been cleared;
• receiving from a processor a first request for a frame for use in backing a virtual memory page;
• determining that a transactional memory facility is available for the first request, wherein the transactional memory facility is configured to manage a transactional memory;
• removing a clean frame, of the two or more clean frames, from the clean frame queue, responsive to the first request, wherein the removing the clean frame comprises:
• attempting, by the transactional memory facility, a non-constrained transaction on the transactional memory to remove the clean frame, responsive to determining that the transactional memory facility is available for the first request;
• determining that the non-constrained transaction to remove the clean frame from the clean frame queue failed;
• obtaining a frame-access lock, responsive to determining that the non-constrained transaction on the transactional memory to remove the clean frame from the clean frame queue failed;
• performing, by the transactional memory facility, a constrained transaction on the transactional memory to remove the clean frame from the clean frame queue;
• and
• releasing the frame-access lock;
• and
• delivering the clean frame to the processor, responsive to the first request.

A computer-program product for managing frames, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a processing unit to cause the processing unit to perform a method comprising:

• producing two or more clean frames by clearing a first batch of two or more used frames for use in backing virtual memory pages;
• adding the two or more clean frames to a clean frame queue, the clean frame queue comprising a plurality of clean frames that have been cleared;
• receiving from a processor a first request for a frame for use in backing a virtual memory page of the unit of work;
• determining that a transactional memory facility is available for the first request, wherein the transactional memory facility is configured to manage a transactional memory;
• removing a clean frame, of the two or more clean frames, from the clean frame queue, responsive to the first request, wherein the removing the clean frame comprises:
• attempting, by the transactional memory facility, a non-constrained transaction on the transactional memory to remove the clean frame, responsive to determining that the transactional memory facility is available for the first request;
• determining that the non-constrained transaction to remove the clean frame from the clean frame queue failed;
• obtaining a frame-access lock, responsive to determining that the non-constrained transaction on the transactional memory to remove the clean frame from the clean frame queue failed;
• performing, by the transactional memory facility, a constrained transaction on the transactional memory to remove the clean frame from the clean frame queue;
• and
• releasing the frame-access lock;
• and
• delivering the clean frame to the processor, responsive to the first request.