Efficiently merging non-identical pages in kernel same-page merging (ksm) for efficient and improved memory deduplication and security

A computing platform comprising:

• a System on a Chip (SoC) having a multi-core central processing unit (CPU) with a plurality of processor cores;
• memory, coupled to the SoC, at least a portion of which is logically partitioned into a plurality of pages;
• software instructions, configured to be executed on one or more processor cores of the multi-core CPU,
• wherein the computing platform is enabled to perform operations to effect Kernel Same-page Merging (KSM), including,
• scan memory pages in the at least a portion of memory to identify first and second memory pages storing similar but not identical data;
• create a delta record between a first memory page and a second memory page;
• determine the delta record has a size that is less than a first threshold;
• and
• utilize the delta record to merge the first memory page with the second memory page.

A non-transitory machine-readable medium have instructions stored thereon configured to be executed on central processor unit (CPU) of a System on a Chip (Soc) in a computing platform, the SoC including an accelerator enabled to create delta records between first and second buffers and produce merged buffers using delta records, wherein execution of the instructions enables the computing platform to:

• maintaining information identifying a set of merged memory pages;
• for a memory write to a merged memory page having write data,
• apply the write data to an original buffer associated with the merged memory page to obtain a modified buffer;
• instruct the accelerator to create a delta record between the original buffer and the modified buffer, the accelerator returning the delta record including a size;
• determine whether the delta record has a size that is less than a threshold;
• and
• when the size of the delta record is less than the threshold, instruct the accelerator to use the delta record to merge the modified buffer with the original buffer to update the merged memory page,
• wherein the merged memory page is kept merged.