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Description of problem:
Installing 6.1 by using PXE server, it will be kernel panic,
but 6.0 is succesful.

Version-Release number of selected component (if applicable):


How reproducible:
prepare an PXE server and using network installing RHEL6.1

Steps to Reproduce:
1. prepare the PXE server by using the config like below:
DHCP NFS TFTP service is started and workable.

modify the BOOTX64.cfg
vi /var/lib/tftpboot/BOOTX64.cfg
#debug --graphics
default=0
timeout=30
splashimage=(nd)/splash.xpm.gz
timeout 5
hiddenmenu
title Red Hat Enterprise Linux 6.0
	root (nd)
	kernel /rhel6.0/vmlinuz ip=dhcp method=nfs:192.168.16.1:/var/ftp/rhel6.0x64/
	initrd /rhel6.0/initrd.img

title Red Hat Enterprise Linux 6.1
	root (nd)
	kernel /rhel6.1/vmlinuz ip=dhcp method=nfs:192.168.16.1:/var/ftp/rhel6.1x64/ 
	initrd /rhel6.1/initrd.img

2.client using PXE install from PXE server

3.select install RHEL6.1
  
Actual results:
It will show kernel panic - not syncing: VFS: unable to mount root fs on unknown-block(1,0) 

Expected results:
it should be into the grub menu to install OS

Additional info:

This can't be fully evaluated until the traceback that results is attached to the bug, but it's certainlty not an efibootmgr bug.  Reassigning to kernel, though it could still be a grub problem or a dhcpd.conf configuration problem.  No way to tell until we see the traceback.

For some reason the kernel's being asked to boot from /dev/ram0. Reassigning to anaconda.

This can't be an anaconda problem yet, anaconda isn't running.  Too vague.