Batched virtual memory remapping for efficient garbage collection of large object areas

A computer system comprising:

• a processor and a computer-readable memory unit coupled to said processor, said memory unit containing instructions that when executed by said processor implement a method of batched remapping of virtual memory addresses for garbage collection in a large object area, said method comprising:
• determining a mapping from a first table to a second table, wherein said first table includes a plurality of identifiers of a plurality of page-aligned large objects included in a large object area of a virtual memory, a first plurality of virtual memory addresses to which said page-aligned large objects are initially assigned, and a plurality of virtual memory sizes of said page-aligned large objects, wherein said second table includes a second plurality of virtual memory addresses to which said page-aligned large objects are assigned for a compaction of said plurality of page-aligned large objects, and wherein said page-aligned large objects are not contiguous in said large object area;
• receiving a request in a single batch, wherein said request includes said second plurality of virtual memory addresses and requests a remapping of said plurality of page-aligned large objects to said second plurality of virtual memory addresses;
• validating said second plurality of virtual memory addresses included in said request;
• and
• remapping said plurality of page-aligned large objects to said second plurality of virtual memory addresses according to said request, wherein a result of said remapping is said compaction that includes said plurality of page-aligned large objects being contiguous in said large object area, and wherein said remapping is performed by a processor of a computer system.

A computer program product, comprising:

• a computer-readable storage medium having a computer-readable program code stored therein, said computer-readable program code containing instructions configured to be executed by a processor of a computer system to implement a method of batched remapping of virtual memory addresses for garbage collection in a large object area, said method comprising:
• determining a mapping from a first table to a second table, wherein said first table includes a plurality of identifiers of a plurality of page-aligned large objects included in a large object area of a virtual memory, a first plurality of virtual memory addresses to which said page-aligned large objects are initially assigned, and a plurality of virtual memory sizes of said page-aligned large objects, wherein said second table includes a second plurality of virtual memory addresses to which said page-aligned large objects are assigned for a compaction of said plurality of page-aligned large objects, and wherein said page-aligned large objects are not contiguous in said large object area;
• receiving a request in a single batch, wherein said request includes said second plurality of virtual memory addresses and requests a remapping of said plurality of page-aligned large objects to said second plurality of virtual memory addresses;
• validating said second plurality of virtual memory addresses included in said request;
• and
• remapping said plurality of page-aligned large objects to said second plurality of virtual memory addresses according to said request, wherein a result of said remapping is said compaction that includes said plurality of page-aligned large objects being contiguous in said large object area, and wherein said remapping is performed by a processor of a computer system.