Micron Technology, Inc.
Generating, maintaining, or utilizing a compressed logical-to-physical table based on sequential writes

Abstract:

A method for managing memory addresses in a memory subsystem is described. The method includes determining that a chunk of logical addresses is sequentially written such that a set of physical addresses mapped to corresponding logical addresses in the chunk are sequential. Thereafter, the memory subsystem updates an entry in a sequential write table for the chunk to indicate that the chunk was sequentially written and a compressed logical-to-physical (L2P) table based on (1) the sequential write table and (2) a full L2P table. The full L2P table includes a set of full L2P entries and each entry corresponds to a logical address in the chunk and references a physical address in the set of physical addresses. The compressed L2P table includes an entry that references a first physical address of the first set of physical addresses that is also referenced by an entry in the L2P table.