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Update kernel to 4.x mainline
Install ELRepo Repository
rpm --import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-3.el7.elrepo.noarch.rpm
Install the kernel
yum --enablerepo=elrepo-kernel install kernel-ml -y
Check Grub 2 for the kernel line
egrep ^menuentry /etc/grub2.cfg | cut -f 2 -d \'
Set new kernel as default boot entry
grub2-set-default 1