memcmp
------
Memcmp does basically the same search for equal pages than mergemem, but it
does not need special support from the kernel, since it uses the ptrace
system call.
It is not merging anything, it is only showing you what mergemem could
merge.

memct
-----
A simple program, which is the perfect victim to mergemem.

memtest
-------
Is also a victim to mergemem, but it keeps on verifying the memory.

