monitor Kernel Samepage Merging

[Justin Cinkelj <justin.cinkelj@xxxxxxx>]

I would like to start multiple VMs from the same base image, and monitor 
how much memory is preserved by Kernel Samepage Merging. There are 
metrics in /sys/kernel/mm/ksm/, but they are system-wide. I guess KSM 
might merge memory from ordinary processes (those which are not VM) too, 
if MADV_MERGEABLE is set - I have no idea if such apps actually exist.

Q1: So ideally I would be able to figure out, how much memory of some 
process is merged, from something like /proc/PID/maps or similar. Is 
anything similar available?

Q2: Is it possible to see how much memory of a process (or whole system) 
has MADV_MERGEABLE set?

Thanks
Justin