Description of problem:
RHEL-4.8 32 image could not boot up after update kernel to latest.

Version-Release number of selected component (if applicable):
Host kernel:
2.6.32-33.el6.x86_64
qemu-kvm version:
qemu-kvm-0.12.1.2-2.73.el6.x86_64

How reproducible:
100%

Steps to Reproduce:
1. Start a RHEL-4.8 32 guest os.
'qemu-kvm -name 'vm1' -monitor tcp:0:6001,server,nowait -drive file=RHEL-4.8-32-2.qcow2,if=ide,cache=none,boot=on,aio=native -net nic,vlan=0,model=e1000,macaddr=02:8F:50:B4:3c:42 -net tap,vlan=0,ifname=e1000_0_6001,script=/etc/qemu-ifup-switch,downscript=no,vhost=on -m 2048 -smp 2 -soundhw ac97 -redir tcp:5000::22 -vnc :0 -usbdevice tablet -rtc-td-hack -cpu qemu64,+sse2 -no-kvm-pit-reinjection -serial unix:/tmp/serial-20100613-180943-9cCi,server,nowait
'
2. Update RHEL-4.8 kernel to latest.
'rpm -ivhf http://download.devel.redhat.com/brewroot/packages/kernel/2.6.9/89.28.EL/i686/kernel-smp-2.6.9-89.28.EL.i686.rpm'
3. Reboot RHEL-4.8 32 guest os.
  
Actual results:
RHEL-4.8 32 guest could not boot up successfully. It stop at probing PCI hardware.

Expected results:
RHEL-4.8 32 guest boot up successfully. 

Additional info:
Original kernel in RHEL-4.8 32 image(uname -a):
Linux virtlab-66-84-137.englab.nay.redhat.com 2.6.9-89.EL #1 Mon Apr 20 10:22:29 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux

Information got from serial port:
ENABLING IO-APIC IRQs

..TIMER: vector=0x31 pin1=2 pin2=-1

checking TSC synchronization across 2 CPUs: 

CPU#0 had -1393445 usecs TSC skew, fixed it up.

CPU#1 had 0 usecs TSC skew, fixed it up.

Brought up 2 CPUs

zapping low mappings.

checking if image is initramfs... it is

Freeing initrd memory: 1560k freed

NET: Registered protocol family 16

PCI: PCI BIOS revision 2.10 entry at 0xffe77, last bus=0

PCI: Using configuration type 1

mtrr: v2.0 (20020519)

mtrr: your CPUs had inconsistent variable MTRR settings

mtrr: your CPUs had inconsistent MTRRdefType settings

mtrr: probably your BIOS does not setup all CPUs.

mtrr: corrected configuration.

ACPI: Subsystem revision 20040816

ACPI: Interpreter enabled

ACPI: Using IOAPIC for interrupt routing

ACPI: PCI Root Bridge [PCI0] (00:00)

PCI: Probing PCI hardware (bus 00)