the driver vmmemctl missing

Issue

• I'm trying to diagnose a problem that appears to be related to ballooning within the vmware ESX farm (I have no access to the ESX console or vSphere) - and the memory stats that I need should be available through /proc/vmmemctl (having read a couple of posts about this driver).

• However, the file is not present on this 6.4 box.

uname -a
Linux __HOSTNAME__ 2.6.32-358.6.2.el6.x86_64 #1 SMP Tue May 14 15:48:21 EDT 2013 x86_64 x86_64 x86_64 GNU/Linux

modinfo vmware_balloon
filename:       /lib/modules/2.6.32-358.6.2.el6.x86_64/kernel/drivers/misc/vmware_balloon.ko
license:        GPL
alias:          vmware_vmmemctl
alias:          dmi:*:svnVMware*:*
version:        1.2.1.1-k
description:    VMware Memory Control (Balloon) Driver
author:         VMware, Inc.
srcversion:     CD80C0B522E3BAB4BD22D29
depends:
vermagic:       2.6.32-358.6.2.el6.x86_64 SMP mod_unload modversions

cat /etc/redhat-release
Red Hat Enterprise Linux Server release 6.4 (Santiago)

ls -la /proc/vmmemctl
ls: cannot access /proc/vmmemctl: No such file or directory

rpm -qf /lib/modules/2.6.32-358.6.2.el6.x86_64/kernel/drivers/misc/vmware_balloon.ko
kernel-2.6.32-358.6.2.el6.x86_64