Protection for Memory Deduplication by Copy-on-Write

摘要

An example method of providing deduplication support for one or more memory pages includes setting, by a memory manager, an initial memory page to a write protection mode. The initial memory page is located in an address space allocated to a memory consumer. The method also includes detecting, by the memory manager, an attempted write to the initial memory page. The method further includes creating, by the memory manager, a copy of the initial memory page in response to detecting the attempted write. The method also includes discarding, based on a determination of whether to discard the initial memory page or the copy of the initial memory page, the initial memory page or the copy of the initial memory page to provide protection for memory deduplication.

主权项

1. A method of providing deduplication support for one or more memory pages, comprising:
setting, by a memory manager, an initial memory page to a write protection mode, wherein the initial memory page is located in an address space allocated to a memory consumer; detecting, by the memory manager, an attempted write to the initial memory page; creating, by the memory manager, a copy of the initial memory page in response to detecting the attempted write; determining whether to discard the initial memory page or the copy of the initial memory page; and discarding, based on the determination of whether to discard the initial memory page or the copy of the initial memory page, the initial memory page or the copy of the initial memory page to provide protection for memory deduplication.