Patent ID: 7979668
Filing Date: 2011-07-12
Classification: G06F

Abstract:
1. A system for allocating real memory to virtual memory page sizes when all real memory is in use, said system comprising: a processor; a processing storage unit coupled to the processor; and an operating system (OS) executing on the processor and which controls functions occurring on the system, wherein the OS has a plurality of modules that execute within the system to provide the following functions: in response to a page fault, selecting a first page frame for a virtual page; in response to determining that said virtual page does not represent a new page, determining whether said first repaging rate for said first page size in said repaging rates data structure is different than a second repaging rate for a second page size in said repaging rates data structure; decreasing allocated first page frames for said first page size and increasing allocated second page frames for said second page size when said first repaging rate is lower that said second repaging rate; increasing said allocated first page frames for said first page size and decreasing said allocated second page frames for said second page size when said first repaging rate is higher than said second repaging rate, wherein said first page size is different from said second page size; and in response to determining that said first page represents a new page, zeroing said first page frame.