Page overlays
Vivek Seshadri, Gennady Pekhimenko, Olatunji Ruwase, Onur Mutlu, Phillip B. Gibbons, Michael A. Kozuch, Todd C. Mowry, Trishul M. Chilimbi · 2015
Many recent works propose mechanisms demonstrating the potential advantages of managing memory at a fine (e.g., cache line) granularity---e.g., fine-grained deduplication and fine-grained memory protection. Unfortunately, existing virtual memory systems track memory at a larger granularity (e.g., 4 KB pages), inhibiting efficient implementation of such techniques. Simply reducing the page size results in an unacceptable increase in page table overhead and TLB pressure.