CentOS 5.6 Boot Time Error Messages

I installed CentOS 5.6 and was getting the following 2 warning messages at boot time:

Memory for crash kernel (0x0 to 0x0) notwithin permissible range
WARNING calibrate_APIC_clock: the APIC timer calibration may be wrong.

To fix these, edit /etc/grub.conf and change this line as follows:

kernel /boot/vmlinuz-2.6.18-238.9.1.el5 ro root=LABEL=/ rhgb apiccalibrationdiff=10000 divider=10

So you have to add the following:
apiccalibrationdiff=10000
divider=10

And Remove:
quiet

That should do it.

References:
VMWare KB About APIC Warning Message
Article to Fix the KDump/KExec Warning at Boot Time