Description of problem:
With kernels later than kernel-2.6.23-0.142.rc3.git10.fc8 my machine fails to 
boot because the initrd does not contain modules for both disk controllers.  
Rerunning mkinitrd --with=ata_piix makes it boot again.

Version-Release number of selected component (if applicable):
Anything later than kernel-2.6.23-0.142.rc3.git10.fc8

How reproducible:
Always

Steps to Reproduce:
1.yum -y update kernel
2.reboot
3.
  
Actual results:
...
Scanning logical volumes
  Reading all physical volumes.  This may take a while...
  Found volume group "FenlasonRawhide" using metadata type lvm2
Activating logical volumes
  2 logical volume(s) in volume group "FenlasonRawhide" now active
  Volume group "VolGroup00" not found
Trying to resume from /dev/VolGroup00/rawhide_swap
Unable to access resume device (/dev/VolGroup00/rawhide_swap)
Creating root device.
Mounting root filesystem.
mount: could not find filesystem '/dev/root'
...

Expected results:
...
Scanning logical volumes                                                        
  Reading all physical volumes.  This may take a while...                       
  Found volume group "VolGroup00" using metadata type lvm2                      
  Found volume group "FenlasonRawhide" using metadata type lvm2                 
Activating logical volumes                                                      
  2 logical volume(s) in volume group "FenlasonRawhide" now active              
  2 logical volume(s) in volume group "VolGroup00" now active                   
Trying to resume from /dev/VolGroup00/rawhide_swap                              
No suspend signature on swap, not resuming.
...

Additional info:
fenlason-lab3.boston.devel.redhat.com