Embodiments of the present invention provide a memory resource optimization method and apparatus, relate to the computer field, solve a problem that existing multi-level memory resources affect each other, and optimize an existing single partitioning mechanism. A specific solution is: obtaining performance data of each program in a working set by using a page coloring technology, obtaining a category of each program in light of a memory access frequency, selecting, according to the category of each program, a page coloring-based partitioning policy corresponding to the working set, and writing the page coloring-based partitioning policy to an operating system kernel, to complete corresponding page coloring-based partitioning processing. The present invention is used to eliminate or reduce mutual interference of processes or threads on a memory resource in light of a feature of the working set, thereby improving overall performance of a computer.

Methods and apparatus to provide application access to a flash device having page cache memory and storage class memory via a bus by mapping a user process virtual address space, wherein the process for the application resides on a host having a processor with direct cache-line access to the page cache memory, wherein the user process virtual address space includes at least a partial mapping of physical address windows for one or more separate flash devices.

A method for data transfer includes receiving in a data transfer operation data to be written by a peripheral device to a specified virtual address in a random access memory (RAM) of a host computer. Upon receiving the data, it is detected that a page that contains the specified virtual address is marked as not present in a page table of the host computer. The peripheral device receives a notification that the page is not present and an estimate of a length of time that will be required to make the page available and selects a mode for handling of the data transfer operation depending upon the estimate.

Solutions that can provide secure access to memory. Some solutions assign tags to pages of memory and ensure secure access to each page of memory by ensuring that a client seeking to access a tagged page of memory is authorized to access pages marked by that tag.