[CentOS] Centos6: Boot from usb 3.0ls /

Wed Feb 29 14:07:03 UTC 2012
John Doe <jdmls at yahoo.com>

From: Volker Poplawski <volker at openbios.org>

> The required xhci_hcd kernel module is not part of the 260 modules in 
> the initrd for some reason. Sony Memory-Stick is included, if you happen 
> to have one of these...
> I was able to rebuild the initrd plus the xhci_hdc module:
> mkinitrd -v --with=xhci_hdc 
> /boot/initramfs-2.6.32-220.4.2.el6.x86_64.img `uname -r`
> Now, how do I tell centos to add the module everytime a new kernel is 
> installed/updated?

Isn't mkinitrd looking at /etc/modprobe.conf?
Or is it only limited to fs, ide/scsi and raid modules?