If your kernel is making use of the -rmap VM, the system may be leaking
memory due to a memory management optimization introduced in -rmap14a.
The -rmap VM has been adopted by several popular distributions, the
memory leak is known to be present in some of the distribution kernels;
it has been fixed in -rmap15e.
If you suspect that your system is affected, please try upgrading your
kernel or contact the distribution's vendor for assistance.