Memory management supporting huge pages

A system comprising:

• one or more processors;
• and
• a memory comprising a main memory and a secondary memory, the memory storing instructions that are operable, when executed, to cause the one or more processors to perform operations comprising:
• receiving a request to access, from a main memory, data contained in a first portion of a first page of data, the first page of data having a first page size and the first portion comprising a second page size that is less than the first page size;
• initiating a page fault based on determining that the first page of data is not stored in the main memory and is stored in a secondary memory;
• in response to initiating the page fault, allocating a portion of the main memory equivalent to the first page size;
• transferring the first portion of the first page of data from the secondary memory to the allocated portion of the main memory without transferring the entire first page of data, wherein a remaining amount of the first page of data remains stored in the secondary memory and the first portion of the page of data that is transferred is made available for access from the main memory before the remaining amount of the page of data is transferred from the secondary memory to the main memory;
• updating a first page table entry associated with the first portion of the first page of data to point to a location of the allocated portion of the main memory to which the first portion of the first page of data is transferred;
• once the entire first page of data is stored in the main memory, reassembling the first page of data from the respective portions of the first page of data transferred from the secondary memory to the allocated portion of the main memory;
• and
• updating a page table entry associated with the first page of data to point to a location of the reassembled first page of data in the main memory.

A non-transitory computer-readable storage device storing instructions executable by one or more processors which, upon such execution, cause the one or more processors to perform operations comprising:

• receiving a request to access, from a main memory, data contained in a first portion of a first page of data, the first page of data having a first page size and the first portion comprising a second page size that is less than the first page size;
• initiating a page fault based on determining that the first page of data is not stored in the main memory and is stored in a secondary memory;
• in response to initiating the page fault, allocating a portion of the main memory equivalent to the first page size;
• transferring the first portion of the first page of data from the secondary memory to the allocated portion of the main memory without transferring the entire first page of data, wherein a remaining amount of the first page of data remains stored in the secondary memory and the first portion of the page of data that is transferred is made available for access from the main memory before the remaining amount of the page of data is transferred from the secondary memory to the main memory;
• updating a first page table entry associated with the first portion of the first page of data to point to a location of the allocated portion of the main memory to which the first portion of the first page of data is transferred;
• once the entire first page of data is stored in the main memory, reassembling the first page of data from the respective portions of the first page of data transferred from the secondary memory to the allocated portion of the main memory;
• and
• updating a page table entry associated with the first page of data to point to a location of the reassembled first page of data in the main memory.