Not sure of effects on SME
Be aware there is a problem in the latest kernel 2.6.32-431.11.2.el6.x86_64 that produces the following error when you try to mount a cifs share.
CentOS Bug Red Hat Bug See comments 37 - 40 of the Red Hat bug
mount error(5): Input/output error
Refer to the mount.cifs(
manual page (e.g. man mount.cifs)
Going back to the previous kernel 2.6.32-431.5.1.el6.x86_64 avoids the error, Centos are aware and have raised a bug with Red Hat.
There is a fix out see Bug details above.
Current SME9 kernel 2.6.32-431.5.1.el6.x86_64
Latest Yum update brings it to 2.6.32-431.11.2.el6.x86_64