Getting acquainted with Kernel Same Page merging

According to the KVM official documentation:

KSM is a memory-saving deduplication feature that merges anonymous (private) pages (not pagecache ones). Although it started this way, KSM is currently suitable for more than Virtual Machine use, as it can be useful to any application that generates many instances of the same data

http://www.Linux-kvm.org/page/KSM

As is well understood from the earlier quote, KSM is a feature that allows sharing identical pages between the different processes running in the system. We may presume that the identical pages may exist due to certain reasons—for example, if there are multiple processes spawned from the same binary or something similar. There is no rule like that though. KSM scans these identical memory pages and consolidates a Copy on write (COW) shared page. Well, if you don't know what I meant by COW, it is nothing but a mechanism by which, when there is an attempt to change a memory region...